技术领域Technical Field
本申请涉及增材制造技术领域，具体而言，涉及一种合成射流辅助离心雾化设备。The present application relates to the field of additive manufacturing technology, and in particular to a synthetic jet-assisted centrifugal atomization device.
背景技术Background technique
转盘离心雾化法可以用于增材制造用金属粉末的生产制备，在其生产金属粉末过程中，金属熔体首先流入转盘表面形成一层液膜，随后金属熔体在离心转盘边缘破碎形成雾化熔滴，其中，可以通过增强转盘边缘位置的金属熔体液膜或者金属熔体纤维扰动水平，进而增强离心转盘边缘金属熔体液膜或者金属熔体纤维的破碎作用，从而有效降低转盘离心雾化生成的熔滴粒径，为增强转盘边缘位置的金属熔体液膜或者金属熔体纤维扰动水平，现有技术中通过另外设置辅助气流场和气流源来产生扰动，但气流场也会降低金属熔体温度，从而导致金属熔体粘度提升，降低转盘离心雾化效果，若为了保证气流场的温度，另外设置加热装置，会导致生产成本较高，因此，需要研究一种合成射流辅助离心雾化设备，既能增强离心转盘边缘金属熔体液膜或者金属熔体纤维的破碎作用，有效提升离心转盘的离心雾化效果，又无需要另外设置气流源以及加热装置。The rotating disk centrifugal atomization method can be used for the production and preparation of metal powder for additive manufacturing. In the process of producing metal powder, the metal melt first flows into the surface of the rotating disk to form a liquid film, and then the metal melt is broken at the edge of the centrifugal rotating disk to form atomized molten droplets. Among them, the metal melt liquid film or metal melt fiber disturbance level at the edge of the rotating disk can be enhanced, thereby enhancing the crushing effect of the metal melt liquid film or metal melt fiber at the edge of the centrifugal rotating disk, thereby effectively reducing the droplet particle size generated by the rotating disk centrifugal atomization, in order to enhance the metal melt liquid film or metal melt fiber at the edge of the rotating disk. In order to improve the disturbance level, in the prior art, disturbance is generated by additionally setting an auxiliary airflow field and an airflow source, but the airflow field will also reduce the temperature of the molten metal, thereby increasing the viscosity of the molten metal and reducing the centrifugal atomization effect of the turntable. If a heating device is additionally provided to ensure the temperature of the airflow field, the production cost will be high. Therefore, it is necessary to study a synthetic jet-assisted centrifugal atomization equipment, which can enhance the crushing effect of the molten metal film or the molten metal fiber at the edge of the centrifugal turntable and effectively improve the centrifugal atomization effect of the centrifugal turntable without the need to additionally set an airflow source and a heating device.
针对上述问题，目前尚未有有效的技术解决方案。There is currently no effective technical solution to the above problems.
发明内容Summary of the invention
本申请的目的在于提供一种合成射流辅助离心雾化设备，既能增强离心转盘边缘处液膜的破碎作用，有效提升转盘离心雾化效果，又无需要另外设置气流源以及加热装置，有利于降低生产成本。The purpose of the present application is to provide a synthetic jet-assisted centrifugal atomization device, which can not only enhance the breaking effect of the liquid film at the edge of the centrifugal turntable and effectively improve the centrifugal atomization effect of the turntable, but also does not require the additional provision of an airflow source and a heating device, which is conducive to reducing production costs.
本申请提供了一种合成射流辅助离心雾化设备，包括：熔炼室、雾化室、导流嘴、离心转盘、驱动装置和合成射流激励器；The present application provides a synthetic jet assisted centrifugal atomization device, comprising: a smelting chamber, an atomization chamber, a flow guide nozzle, a centrifugal turntable, a driving device and a synthetic jet actuator;
所述熔炼室包括熔炼坩埚和中间包，所述熔炼坩埚用于将金属母料熔炼成金属熔体，所述中间包用于盛接所述金属熔体；The smelting chamber comprises a smelting crucible and a tundish, wherein the smelting crucible is used to smelt the metal mother material into a metal melt, and the tundish is used to hold the metal melt;
所述雾化室设置在所述熔炼室的下方，所述导流嘴设置在所述中间包的下方且伸入所述雾化室，所述离心转盘同轴设置在所述导流嘴的下方，所述导流嘴用于将所述中间包中的所述金属熔体输送至所述离心转盘，所述离心转盘与所述驱动装置连接，所述驱动装置用于驱动所述离心转盘转动，所述离心转盘用于驱使流至所述离心转盘上的所述金属熔体做离心运动以形成液膜并使所述液膜在所述离心转盘边缘处破碎雾化；The atomizing chamber is arranged below the smelting chamber, the guide nozzle is arranged below the tundish and extends into the atomizing chamber, the centrifugal turntable is coaxially arranged below the guide nozzle, the guide nozzle is used to transport the molten metal in the tundish to the centrifugal turntable, the centrifugal turntable is connected to the driving device, the driving device is used to drive the centrifugal turntable to rotate, and the centrifugal turntable is used to drive the molten metal flowing onto the centrifugal turntable to perform centrifugal motion to form a liquid film and break the liquid film at the edge of the centrifugal turntable to be atomized;
所述合成射流激励器设置在所述雾化室中，所述合成射流激励器利用所述雾化室中的气体生成合成射流并使所述合成射流喷出至所述离心转盘边缘处以加强所述液膜的破碎作用。The synthetic jet actuator is arranged in the atomization chamber. The synthetic jet actuator utilizes the gas in the atomization chamber to generate a synthetic jet and sprays the synthetic jet to the edge of the centrifugal turntable to enhance the breaking effect of the liquid film.
通过上述设置，既能增强离心转盘边缘处液膜的破碎作用，有效提升转盘离心雾化效果，又无需要另外设置气流源以及加热装置，有利于降低生产成本。Through the above arrangement, the breaking effect of the liquid film at the edge of the centrifugal turntable can be enhanced, effectively improving the centrifugal atomization effect of the turntable, and there is no need to set up an additional airflow source and heating device, which is conducive to reducing production costs.
可选地，所述离心转盘的下表面设置有第一倾斜面和第二倾斜面，所述第一倾斜面设置在所述第二倾斜面的上方，所述第一倾斜面的母线与所述离心转盘的中心轴线之间具有第一夹角，且所述第一倾斜面与所述离心转盘的中心轴线的距离从上至下逐渐减小，所述第二倾斜面的母线与所述离心转盘的中心轴线之间具有第二夹角，所述第二倾斜面与所述离心转盘的中心轴线的距离从上至下逐渐减小，且所述第二夹角比所述第一夹角大。Optionally, the lower surface of the centrifugal turntable is provided with a first inclined surface and a second inclined surface, the first inclined surface is arranged above the second inclined surface, a generatrix of the first inclined surface has a first angle with the central axis of the centrifugal turntable, and the distance between the first inclined surface and the central axis of the centrifugal turntable gradually decreases from top to bottom, a generatrix of the second inclined surface has a second angle with the central axis of the centrifugal turntable, the distance between the second inclined surface and the central axis of the centrifugal turntable gradually decreases from top to bottom, and the second angle is larger than the first angle.
可选地，所述第一夹角范围为5°-30°，所述第二夹角范围为50°-85°。Optionally, the first angle ranges from 5° to 30°, and the second angle ranges from 50° to 85°.
可选地，所述合成射流激励器包括激励信号发生器、压电振动片、腔体和进出口，所述腔体内设置有空腔，所述压电振动片设置在所述腔体中，所述进出口设置在所述腔体上且开口朝向所述离心转盘边缘位置，所述进出口用于连通所述空腔和所述雾化室，所述激励信号发生器与所述压电振动片连接并用于控制所述压电振动片振动，所述压电振动片用于在振动时周期性地驱动所述空腔内的空气从所述进出口排出形成所述合成射流。Optionally, the synthetic jet actuator includes an excitation signal generator, a piezoelectric vibrating piece, a cavity and an inlet and outlet, wherein a cavity is arranged in the cavity, the piezoelectric vibrating piece is arranged in the cavity, the inlet and outlet are arranged on the cavity and the opening is toward the edge of the centrifugal turntable, the inlet and outlet are used to connect the cavity and the atomization chamber, the excitation signal generator is connected to the piezoelectric vibrating piece and is used to control the vibration of the piezoelectric vibrating piece, and the piezoelectric vibrating piece is used to periodically drive the air in the cavity to be discharged from the inlet and outlet during vibration to form the synthetic jet.
通过上述设置，实现空腔周期性的排气及吸气动作，空腔周期性的排气和吸气动作可以产生合成射流，合成射流为不连续的周期性流动射流，可以有效产生扰动作用。Through the above arrangement, the periodic exhaust and intake action of the cavity is realized, and the periodic exhaust and intake action of the cavity can generate a synthetic jet. The synthetic jet is a discontinuous periodic flow jet, which can effectively generate a disturbance effect.
可选地，所述腔体的形状为环形且所述腔体与所述离心转盘同轴设置，所述腔体设置有多个围绕所述离心转盘的中轴线呈环形排布的所述进出口或一个与所述腔体同轴设置的环形的所述进出口。Optionally, the cavity is annular in shape and is coaxially arranged with the centrifugal turntable. The cavity is provided with a plurality of inlets and outlets arranged in an annular shape around the central axis of the centrifugal turntable or an annular inlet and outlet coaxially arranged with the cavity.
可选地，所述腔体中设置有至少一个环形的所述压电振动片和/或多个呈环形排布的离散的所述压电振动片。Optionally, at least one annular piezoelectric vibration plate and/or a plurality of discrete piezoelectric vibration plates arranged in an annular shape are disposed in the cavity.
可选地，所述进出口远离所述空腔的一侧设置有引导部，所述引导部用于导引所述空腔的气体排出。Optionally, a guide portion is provided on a side of the inlet and outlet away from the cavity, and the guide portion is used to guide the gas in the cavity to be discharged.
可选地，所述进出口的宽度为0.5mm-3mm，所述空腔的高度为所述进出口的宽度的0.5倍-1.2倍，所述引导部的高度为所述进出口的宽度的0.5倍-1倍。Optionally, the width of the inlet and outlet is 0.5 mm-3 mm, the height of the cavity is 0.5 times-1.2 times the width of the inlet and outlet, and the height of the guide portion is 0.5 times-1 times the width of the inlet and outlet.
可选地，所述腔体设置有多个，多个所述腔体环绕所述离心转盘设置，每个所述腔体设置有至少一个所述进出口和至少一个所述压电振动片。Optionally, a plurality of the cavities are provided, and the plurality of the cavities are arranged around the centrifugal turntable, and each of the cavities is provided with at least one inlet and outlet and at least one piezoelectric vibration piece.
可选地，所述离心转盘的上方和/或下方设置有至少一个所述合成射流激励器。Optionally, at least one synthetic jet actuator is arranged above and/or below the centrifugal turntable.
通过上述设置，可以实现合成射流加强液膜的破碎作用。Through the above arrangement, the synthetic jet can achieve the effect of enhancing the breaking of the liquid film.
可选地，所述离心转盘的下方设置有至少一个所述合成射流激励器，所述离心转盘边缘位置向下投影落在设置在所述离心转盘下方的其中一个所述合成射流激励器的所述进出口上并偏向所述离心转盘的中心轴线。Optionally, at least one synthetic jet actuator is arranged below the centrifugal turntable, and the edge position of the centrifugal turntable is projected downward onto the inlet and outlet of one of the synthetic jet actuators arranged below the centrifugal turntable and is biased toward the central axis of the centrifugal turntable.
可选地，所述离心转盘的上方设置有所述合成射流激励器，设置在所述离心转盘上方的所述合成射流激励器设置在所述导流嘴的外侧，且设置在所述离心转盘上方的所述合成射流激励器的所述压电振动片设置在靠近所述导流嘴的一侧的侧面上。Optionally, the synthetic jet actuator is arranged above the centrifugal turntable, the synthetic jet actuator arranged above the centrifugal turntable is arranged on the outside of the guide nozzle, and the piezoelectric vibration piece of the synthetic jet actuator arranged above the centrifugal turntable is arranged on the side surface close to the guide nozzle.
可选地，设置在所述离心转盘上方的所述合成射流激励器与所述导流嘴之间设置有分隔筒套，所述分隔筒套与所述导流嘴同轴设置，所述分隔筒套与所述导流嘴的外周面围成第一流道，所述分隔筒套与设置在所述离心转盘上方的所述合成射流激励器的设置有所述压电振动片的侧面围成第二流道，所述第一流道的入口和所述第二流道的入口均与一气流分配室连通，所述气流分配室用于连通所述雾化室的气流循环系统并向所述第一流道和所述第二流道提供气流，所述第一流道的出口和所述第二流道的出口均朝向所述离心转盘。Optionally, a separation sleeve is arranged between the synthetic jet actuator arranged above the centrifugal turntable and the guide nozzle, and the separation sleeve is coaxially arranged with the guide nozzle. The separation sleeve and the outer peripheral surface of the guide nozzle form a first flow channel, and the separation sleeve and the side surface of the synthetic jet actuator arranged above the centrifugal turntable on which the piezoelectric vibration plate is arranged form a second flow channel. The inlet of the first flow channel and the inlet of the second flow channel are both connected to an airflow distribution chamber, and the airflow distribution chamber is used to connect to the airflow circulation system of the atomization chamber and provide airflow to the first flow channel and the second flow channel, and the outlet of the first flow channel and the outlet of the second flow channel are both facing the centrifugal turntable.
可选地，设置在所述离心转盘上方的所述合成射流激励器的所述空腔与所述气流分配室连通。Optionally, the cavity of the synthetic jet actuator disposed above the centrifugal turntable is communicated with the airflow distribution chamber.
可选地，设置在所述离心转盘上方的所述合成射流激励器的所述压电振动片的形状为环形，所述压电振动片环绕所述导流嘴的外周面设置。Optionally, the piezoelectric vibration plate of the synthetic jet actuator disposed above the centrifugal turntable is in a ring shape, and the piezoelectric vibration plate is disposed around the outer circumference of the guide nozzle.
由上可知，本申请提供的合成射流辅助离心雾化设备，通过在雾化室中设置合成射流激励器，由合成射流激励器将雾化室中的气体生成合成射流并使所述合成射流喷出至离心转盘边缘处以加强液膜的破碎作用，由于合成射流激励器是利用雾化室中的气体生成合成射流，因此，该合成射流的温度不会较低，再利用该合成射流喷向离心转盘边缘处，对液膜施加扰动，从而加强液膜的破碎作用，所以，本申请提供的合成射流辅助离心雾化设备既能增强离心转盘边缘处液膜的破碎作用，有效提升转盘离心雾化效果，又无需要另外设置气流源以及加热装置，有利于降低生产成本。From the above, it can be seen that the synthetic jet-assisted centrifugal atomization equipment provided by the present application, by arranging a synthetic jet actuator in the atomization chamber, the synthetic jet actuator generates a synthetic jet from the gas in the atomization chamber and sprays the synthetic jet to the edge of the centrifugal turntable to enhance the breakup of the liquid film. Since the synthetic jet actuator utilizes the gas in the atomization chamber to generate a synthetic jet, the temperature of the synthetic jet will not be low. The synthetic jet is then sprayed to the edge of the centrifugal turntable to impart disturbance to the liquid film, thereby enhancing the breakup of the liquid film. Therefore, the synthetic jet-assisted centrifugal atomization equipment provided by the present application can enhance the breakup of the liquid film at the edge of the centrifugal turntable and effectively improve the centrifugal atomization effect of the turntable without the need to separately set up an airflow source and a heating device, which is beneficial to reducing production costs.
本申请的其他特征和优点将在随后的说明书阐述，并且，部分地从说明书中变得显而易见，或者通过实施本申请实施例了解。本申请的目的和其他优点可通过在所写的说明书、以及附图中所特别指出的结构来实现和获得。Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本申请实施例提供的合成射流辅助离心雾化设备的第一种整体结构图。FIG1 is a first overall structural diagram of a synthetic jet-assisted centrifugal atomization device provided in an embodiment of the present application.
图2为本申请实施例提供的合成射流辅助离心雾化设备的第二种整体结构图。FIG. 2 is a second overall structural diagram of the synthetic jet-assisted centrifugal atomization device provided in an embodiment of the present application.
图3为本申请实施例提供的合成射流激励器设置在离心转盘下方的第一种位置示意图。FIG3 is a schematic diagram of a first position of a synthetic jet actuator provided in an embodiment of the present application, in which the synthetic jet actuator is arranged below a centrifugal turntable.
图4为本申请实施例提供的合成射流激励器设置在离心转盘下方的第二种位置示意图。FIG. 4 is a schematic diagram of a second position of the synthetic jet actuator provided in an embodiment of the present application, in which the synthetic jet actuator is arranged below the centrifugal turntable.
图5为本申请实施例提供的合成射流激励器的第一种结构示意图。FIG. 5 is a schematic diagram of the first structure of the synthetic jet actuator provided in an embodiment of the present application.
图6为本申请实施例提供的腔体的形状为环形的第一种结构的结构示意图。FIG6 is a schematic structural diagram of a first structure in which the cavity provided in an embodiment of the present application is in the shape of a ring.
图7为本申请实施例提供的腔体的形状为环形的第二种结构的结构示意图。FIG. 7 is a schematic diagram of the structure of a second structure in which the cavity provided in an embodiment of the present application is in the shape of a ring.
图8为本申请实施例提供的腔体的形状为环形的第三种结构的结构示意图。FIG8 is a schematic structural diagram of a third structure in which the cavity provided in an embodiment of the present application is in the shape of a ring.
图9为本申请实施例提供的多个合成射流激励器的第一种结构示意图。FIG. 9 is a schematic diagram of a first structure of multiple synthetic jet actuators provided in an embodiment of the present application.
图10为本申请实施例提供的多个合成射流激励器的第二种结构示意图。FIG. 10 is a schematic diagram of a second structure of multiple synthetic jet actuators provided in an embodiment of the present application.
图11为本申请实施例提供的合成射流激励器设置在离心转盘上方的位置示意图。FIG. 11 is a schematic diagram showing the position of a synthetic jet actuator provided in an embodiment of the present application, which is arranged above a centrifugal turntable.
图12为本申请实施例提供的合成射流激励器的第二种结构示意图。FIG. 12 is a schematic diagram of a second structure of a synthetic jet actuator provided in an embodiment of the present application.
标号说明：100、熔炼室；101、熔炼坩埚；102、中间包；110、雾化室；120、导流嘴；130、离心转盘；140、驱动装置；150、合成射流激励器；151、激励信号发生器；152、压电振动片；153、腔体；154、进出口；155、空腔；156、引导部；161、第一倾斜面；162、第二倾斜面；163、分隔筒套；164、气流分配室；171、第一收粉罐；172、第二收粉罐；173、第三收粉罐；174、旋风分离器；175、除尘器；176、引风机；177、第一回风机；178、第三管道。Explanation of reference numerals: 100, smelting chamber; 101, smelting crucible; 102, tundish; 110, atomizing chamber; 120, guide nozzle; 130, centrifugal turntable; 140, driving device; 150, synthetic jet actuator; 151, excitation signal generator; 152, piezoelectric vibrating plate; 153, cavity; 154, inlet and outlet; 155, cavity; 156, guide portion; 161, first inclined surface; 162, second inclined surface; 163, partition sleeve; 164, air flow distribution chamber; 171, first powder collecting tank; 172, second powder collecting tank; 173, third powder collecting tank; 174, cyclone separator; 175, dust collector; 176, induced draft fan; 177, first return air fan; 178, third duct.
具体实施方式Detailed ways
下面将结合本申请实施例中附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。同时，在本申请的描述中，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
请参照图1-图12，图1是本申请一些实施例中的合成射流辅助离心雾化设备的整体结构图。既能增强离心转盘130边缘金属熔体液膜或者金属熔体离心纤维的破碎作用，有效提升转盘离心雾化效果，又无需要另外设置气流源以及加热装置，有利于降低生产成本。Please refer to Figures 1 to 12, Figure 1 is an overall structural diagram of a synthetic jet-assisted centrifugal atomization device in some embodiments of the present application. It can enhance the crushing effect of the metal melt liquid film or the metal melt centrifugal fiber at the edge of the centrifugal turntable 130, effectively improve the centrifugal atomization effect of the turntable, and there is no need to set up an additional airflow source and heating device, which is conducive to reducing production costs.
本申请提供的一种合成射流辅助离心雾化设备，包括：熔炼室100、雾化室110、导流嘴120、离心转盘130、驱动装置140和合成射流激励器150；The present application provides a synthetic jet assisted centrifugal atomization device, comprising: a smelting chamber 100, an atomization chamber 110, a flow guide nozzle 120, a centrifugal turntable 130, a driving device 140 and a synthetic jet actuator 150;
熔炼室100包括熔炼坩埚101和中间包102，熔炼坩埚101用于将金属母料熔炼成金属熔体，中间包102用于盛接金属熔体；The smelting chamber 100 includes a smelting crucible 101 and a tundish 102. The smelting crucible 101 is used to smelt the metal mother material into a metal melt, and the tundish 102 is used to contain the metal melt.
雾化室110设置在熔炼室100的下方，导流嘴120设置在中间包102的下方且伸入雾化室110，离心转盘130同轴设置在导流嘴120的下方，导流嘴120用于将中间包102中的金属熔体输送至离心转盘130，离心转盘130与驱动装置140连接，驱动装置140用于驱动离心转盘130转动，离心转盘130用于驱使流至离心转盘130上的金属熔体做离心运动以形成液膜并使液膜在离心转盘130边缘处破碎雾化；The atomizing chamber 110 is arranged below the smelting chamber 100, the guide nozzle 120 is arranged below the tundish 102 and extends into the atomizing chamber 110, the centrifugal turntable 130 is coaxially arranged below the guide nozzle 120, the guide nozzle 120 is used to transport the molten metal in the tundish 102 to the centrifugal turntable 130, the centrifugal turntable 130 is connected to the driving device 140, the driving device 140 is used to drive the centrifugal turntable 130 to rotate, and the centrifugal turntable 130 is used to drive the molten metal flowing onto the centrifugal turntable 130 to perform centrifugal motion to form a liquid film and make the liquid film broken and atomized at the edge of the centrifugal turntable 130;
合成射流激励器150设置在雾化室110中，合成射流激励器150利用雾化室110中的气体生成合成射流并使合成射流喷出至离心转盘130边缘处以加强液膜的破碎作用。The synthetic jet actuator 150 is disposed in the atomizing chamber 110 . The synthetic jet actuator 150 utilizes the gas in the atomizing chamber 110 to generate a synthetic jet and ejects the synthetic jet to the edge of the centrifugal turntable 130 to enhance the breaking effect of the liquid film.
具体地，通过在雾化室110中设置合成射流激励器150，由合成射流激励器150将雾化室110中的气体生成合成射流并使合成射流喷出至离心转盘130边缘处以加强液膜的破碎作用，由于合成射流激励器150利用雾化室110中的气体生成合成射流，因此，该合成射流的温度不会较低，再利用该合成射流喷向离心转盘130边缘处，对液膜施加扰动，从而加强液膜的破碎作用，所以，本申请提供的合成射流辅助离心雾化设备既能增强离心转盘130边缘处液膜的破碎作用，有效提升转盘离心雾化效果，又无需要另外设置气流源以及加热装置，有利于降低生产成本。Specifically, a synthetic jet actuator 150 is arranged in the atomization chamber 110, and the synthetic jet actuator 150 generates a synthetic jet from the gas in the atomization chamber 110 and sprays the synthetic jet to the edge of the centrifugal turntable 130 to enhance the breakup of the liquid film. Since the synthetic jet actuator 150 generates a synthetic jet using the gas in the atomization chamber 110, the temperature of the synthetic jet will not be low. The synthetic jet is then sprayed to the edge of the centrifugal turntable 130 to impart disturbance to the liquid film, thereby enhancing the breakup of the liquid film. Therefore, the synthetic jet-assisted centrifugal atomization device provided in the present application can enhance the breakup of the liquid film at the edge of the centrifugal turntable 130 and effectively improve the centrifugal atomization effect of the turntable without the need to separately set up an airflow source and a heating device, which is beneficial to reducing production costs.
工作过程：金属原材料在熔炼室100的熔炼坩埚101内完成熔炼，进而成为熔融状态的金属熔体，随后通过倒炉作业，将熔炼坩埚101内熔融状态的金属熔体转移至中间包102中，中间包102内熔融状态的金属熔体进入导流嘴120内，在导流嘴120内形成熔融状态的金属液柱，并从导流嘴120的出口流入雾化室110中的离心转盘130上，在离心力的作用下，熔融状态的金属熔体在离心转盘130的表面形成熔融状态金属液体膜，当熔融状态金属液体膜达到离心转盘130边缘后，熔融状态金属液体膜会在离心转盘130边缘处形成液膜或液体纤维，随后发生破碎，为了进一步加强离心转盘130边缘处的液膜破碎作用，通过合成射流激励器150将雾化室110中的气体生成合成射流并使合成射流喷出至离心转盘130边缘处，对液膜施加扰动，从而加强液膜的破碎作用，最终形成大量微小的熔融状态金属液滴，微小熔滴在飞行过程中冷却凝固形成金属粉末，从而完成雾化作业。Working process: The metal raw materials are melted in the melting crucible 101 of the melting chamber 100 to become a molten metal melt. Then, the molten metal melt in the melting crucible 101 is transferred to the tundish 102 through the furnace pouring operation. The molten metal melt in the tundish 102 enters the guide nozzle 120, forms a molten metal liquid column in the guide nozzle 120, and flows from the outlet of the guide nozzle 120 to the centrifugal turntable 130 in the atomization chamber 110. Under the action of centrifugal force, the molten metal melt forms a molten metal liquid film on the surface of the centrifugal turntable 130. When After the molten metal liquid film reaches the edge of the centrifugal turntable 130, the molten metal liquid film will form a liquid film or liquid fiber at the edge of the centrifugal turntable 130, and then break. In order to further strengthen the liquid film breaking effect at the edge of the centrifugal turntable 130, the synthetic jet actuator 150 generates a synthetic jet from the gas in the atomization chamber 110 and sprays the synthetic jet to the edge of the centrifugal turntable 130, thereby applying disturbance to the liquid film, thereby strengthening the liquid film breaking effect, and finally forming a large number of tiny molten metal droplets. The tiny molten droplets cool and solidify during flight to form metal powder, thereby completing the atomization operation.
在一些实施方式中，离心转盘130的下表面设置有第一倾斜面161和第二倾斜面162，第一倾斜面161设置在第二倾斜面162的上方，第一倾斜面161的母线与离心转盘130的中心轴线之间具有第一夹角A，且第一倾斜面161与离心转盘130的中心轴线的距离从上至下逐渐减小，第二倾斜面162的母线与离心转盘130的中心轴线之间具有第二夹角B，第二倾斜面162与离心转盘130的中心轴线的距离从上至下逐渐减小，且第二夹角B比第一夹角A大。In some embodiments, the lower surface of the centrifugal turntable 130 is provided with a first inclined surface 161 and a second inclined surface 162, the first inclined surface 161 is arranged above the second inclined surface 162, a first angle A is formed between the generatrix of the first inclined surface 161 and the central axis of the centrifugal turntable 130, and the distance between the first inclined surface 161 and the central axis of the centrifugal turntable 130 gradually decreases from top to bottom, a second angle B is formed between the generatrix of the second inclined surface 162 and the central axis of the centrifugal turntable 130, the distance between the second inclined surface 162 and the central axis of the centrifugal turntable 130 gradually decreases from top to bottom, and the second angle B is larger than the first angle A.
具体地，如图4所示，通过设置第二倾斜面162来引导由离心转盘130旋转形成的气流流向离心转盘130的边缘处，以进一步加强液膜的扰动，通过设置第一倾斜面161，将第二倾斜面162引导的气流以及离心转盘130的下表面处的部分合成射流流向离心转盘130边缘处，以提高离心转盘130边缘处液膜的扰动效果。Specifically, as shown in Figure 4, the second inclined surface 162 is set to guide the airflow formed by the rotation of the centrifugal turntable 130 to flow to the edge of the centrifugal turntable 130 to further enhance the disturbance of the liquid film. The first inclined surface 161 is set to guide the airflow guided by the second inclined surface 162 and part of the synthetic jet at the lower surface of the centrifugal turntable 130 to the edge of the centrifugal turntable 130 to improve the disturbance effect of the liquid film at the edge of the centrifugal turntable 130.
在一些实施方式中，第一夹角A范围为5°-30°，第二夹角范围B为50°-85°。In some embodiments, the first angle A ranges from 5° to 30°, and the second angle B ranges from 50° to 85°.
具体地，如图4所示,通过设置第一夹角A和第二夹角B的范围，能够有效引导由离心转盘130旋转形成的气流以及离心转盘130的下表面处的部分合成射流流向离心转盘130边缘处。4, by setting the range of the first angle A and the second angle B, the airflow formed by the rotation of the centrifugal turntable 130 and part of the synthetic jet at the lower surface of the centrifugal turntable 130 can be effectively guided to the edge of the centrifugal turntable 130.
在一些实施方式中，合成射流激励器150包括激励信号发生器151、压电振动片152、腔体153和进出口154，腔体153内设置有空腔155，压电振动片152设置在腔体153中，进出口154设置在腔体153上且开口朝向离心转盘130边缘位置，进出口154用于连通空腔155和雾化室110，激励信号发生器151与压电振动片152连接并用于控制压电振动片152振动，压电振动片152用于在振动时周期性地驱动空腔155内的气体从进出口154排出形成合成射流。In some embodiments, the synthetic jet actuator 150 includes an excitation signal generator 151, a piezoelectric vibration piece 152, a cavity 153 and an inlet and outlet 154. The cavity 153 is provided with a cavity 155. The piezoelectric vibration piece 152 is provided in the cavity 153. The inlet and outlet 154 are provided on the cavity 153 and the opening is toward the edge of the centrifugal turntable 130. The inlet and outlet 154 are used to connect the cavity 155 and the atomization chamber 110. The excitation signal generator 151 is connected to the piezoelectric vibration piece 152 and is used to control the vibration of the piezoelectric vibration piece 152. The piezoelectric vibration piece 152 is used to periodically drive the gas in the cavity 155 to be discharged from the inlet and outlet 154 to form a synthetic jet when vibrating.
具体地，合成射流激励器150工作时，由激励信号发生器151发出控制信号，使得压电振动片152按照一定的频率和振幅发生周期性的形变振动，压电振动片152利用周期性的形变振动交替吹吸周围气体，吹出的气体从进出口154喷出合成射流。例如，如图4所示，在一个工作周期内，当压电振动片152往下振动时（图4中压电振动片152下方虚线所示），空腔155体积增大，雾化室110内的气体从进出口154进入空腔155中，实现空腔155的吸气，空腔155吸气过程一直持续到压电振动片152往下振动的最大幅值处，随后压电振动片152开始向上振动，此时空腔155的体积减小，空腔155内的气体通过进出口154喷出，形成合成射流，空腔155的喷气一直持续到压电振动片152向上振动的最大幅值处（图4中压电振动片152上方虚线所示），然后又开始向下振动，以此循环，从而实现空腔155周期性的排气及吸气动作，空腔155周期性的排气和吸气动作可以产生合成射流，合成射流为不连续的周期性流动射流，可以有效产生扰动作用。Specifically, when the synthetic jet actuator 150 is working, the excitation signal generator 151 sends a control signal, so that the piezoelectric vibration piece 152 undergoes periodic deformation vibration at a certain frequency and amplitude. The piezoelectric vibration piece 152 uses periodic deformation vibration to alternately blow and suck the surrounding gas, and the blown gas is ejected into a synthetic jet from the inlet and outlet 154. For example, as shown in FIG4 , in one working cycle, when the piezoelectric vibration piece 152 vibrates downward (as shown by the dotted line below the piezoelectric vibration piece 152 in FIG4 ), the volume of the cavity 155 increases, and the gas in the atomization chamber 110 enters the cavity 155 from the inlet and outlet 154, realizing the suction of the cavity 155. The suction process of the cavity 155 continues until the piezoelectric vibration piece 152 reaches the maximum amplitude of the downward vibration, and then the piezoelectric vibration piece 152 begins to vibrate upward, at which time the volume of the cavity 155 decreases, and the cavity 155 is compressed. The gas in 155 is ejected through the inlet and outlet 154 to form a synthetic jet. The jet of cavity 155 continues until the piezoelectric vibrating piece 152 reaches the maximum amplitude of the upward vibration (as shown by the dotted line above the piezoelectric vibrating piece 152 in FIG4 ), and then starts to vibrate downward, repeating this cycle, thereby realizing the periodic exhaust and intake action of cavity 155. The periodic exhaust and intake action of cavity 155 can generate a synthetic jet. The synthetic jet is a discontinuous periodic flow jet that can effectively generate a disturbance effect.
在一些实施方式中，腔体153的形状为环形且腔体153与离心转盘130同轴设置，腔体153设置有多个围绕离心转盘130的中轴线呈环形排布的进出口154或一个与腔体153同轴设置的环形的进出口154。In some embodiments, the cavity 153 is annular in shape and is coaxially arranged with the centrifugal turntable 130 . The cavity 153 is provided with a plurality of inlets and outlets 154 arranged in an annular shape around the central axis of the centrifugal turntable 130 or an annular inlet and outlet 154 coaxially arranged with the cavity 153 .
具体地，通过设置腔体153的形状为环形，腔体153设置有多个围绕离心转盘130的中轴线呈环形排布的进出口154或一个与腔体153同轴设置的环形的进出口154，如图6-图8所示，其中，进出口154的形状可以为环形槽、矩形孔或者圆孔，但不限于此。Specifically, by setting the shape of the cavity 153 to be annular, the cavity 153 is provided with a plurality of inlets and outlets 154 arranged in a ring around the central axis of the centrifugal turntable 130 or an annular inlet and outlet 154 coaxially arranged with the cavity 153, as shown in Figures 6-8, wherein the shape of the inlet and outlet 154 can be an annular groove, a rectangular hole or a circular hole, but is not limited thereto.
在一些实施方式中，腔体153中设置有至少一个环形的压电振动片152和/或多个呈环形排布的离散的压电振动片152。In some embodiments, at least one annular piezoelectric vibrating piece 152 and/or a plurality of discrete piezoelectric vibrating pieces 152 arranged in an annular shape are disposed in the cavity 153 .
具体地，腔体153中的压电振动片152的设置方式有多种，例如，腔体153中设置有至少一个环形的压电振动片152，该环形的压电振动片152与环形的腔体153相适配；腔体153中也可以同时设置有至少一个环形的压电振动片152和多个呈环形排布的离散的压电振动片152，多个呈环形排布的离散的压电振动片152环绕一个环形的压电振动片152周围设置，环形的压电振动片152和多个呈环形排布的离散的压电振动片152均与一个激励信号发生器151连接，其中，离散的压电振动片152是指相对环形来说，沿圆形的周边分散排布；腔体153中也可以仅设置多个呈环形排布的离散的压电振动片152，从而产生合成射流喷出至离心转盘130边缘处以加强液膜的破碎作用。Specifically, there are many ways to set the piezoelectric vibration plate 152 in the cavity 153. For example, at least one annular piezoelectric vibration plate 152 is set in the cavity 153, and the annular piezoelectric vibration plate 152 is compatible with the annular cavity 153; at least one annular piezoelectric vibration plate 152 and multiple discrete piezoelectric vibration plates 152 arranged in a ring can also be set in the cavity 153 at the same time, and the multiple discrete piezoelectric vibration plates 152 arranged in a ring are arranged around an annular piezoelectric vibration plate 152, and the annular piezoelectric vibration plate 152 and the multiple discrete piezoelectric vibration plates 152 arranged in a ring are all connected to an excitation signal generator 151, wherein the discrete piezoelectric vibration plates 152 refer to those that are dispersedly arranged along the periphery of the circle relative to the ring; the cavity 153 can also only have multiple discrete piezoelectric vibration plates 152 arranged in a ring, so as to generate a synthetic jet that is ejected to the edge of the centrifugal turntable 130 to enhance the crushing effect of the liquid film.
在一些实施方式中，进出口154远离空腔155的一侧设置有引导部156，引导部156用于导引空腔155的气体排出。In some embodiments, a guide portion 156 is disposed on a side of the inlet/outlet 154 away from the cavity 155 , and the guide portion 156 is used to guide the gas in the cavity 155 to be discharged.
具体地，如图4所示，通过在进出口154远离空腔155的一侧设置有引导部156，由引导部156导引空腔155的气体排出，加强合成射流对离心转盘130边缘处液膜的扰动。Specifically, as shown in FIG. 4 , a guide portion 156 is provided on a side of the inlet and outlet 154 away from the cavity 155 , and the gas in the cavity 155 is discharged by the guide portion 156 , thereby enhancing the disturbance of the liquid film at the edge of the centrifugal turntable 130 by the synthetic jet.
在一些实施例中，进出口154的宽度W为0.5mm-3mm，空腔155的高度h为进出口154的宽度W的0.5倍-1.2倍，引导部156的高度t为进出口154的宽度W的0.5倍-1倍。In some embodiments, the width W of the inlet and outlet 154 is 0.5 mm-3 mm, the height h of the cavity 155 is 0.5 times-1.2 times the width W of the inlet and outlet 154 , and the height t of the guide portion 156 is 0.5 times-1 times the width W of the inlet and outlet 154 .
具体地，如图5所示，通过限制引导部156的高度t，对喷出的合成射流起引导作用的同时又不会过多妨碍吸气阶段的气体流入，通过限制空腔155的高度h，能够有效产生合成射流。Specifically, as shown in FIG. 5 , by limiting the height t of the guide portion 156 , the ejected synthetic jet is guided without excessively hindering the inflow of gas during the inhalation phase. By limiting the height h of the cavity 155 , the synthetic jet can be effectively generated.
其中，若进出口154的形状为环形槽，则进出口154的宽度W为环形槽的宽度（如图6所示），若进出口154的形状为矩形孔，则进出口154的宽度W为矩形孔的宽度（如图7所示），若进出口154的形状为圆孔，则进出口154的宽度W为圆孔的孔径（如图8所示）。Among them, if the shape of the inlet and outlet 154 is an annular groove, the width W of the inlet and outlet 154 is the width of the annular groove (as shown in Figure 6); if the shape of the inlet and outlet 154 is a rectangular hole, the width W of the inlet and outlet 154 is the width of the rectangular hole (as shown in Figure 7); if the shape of the inlet and outlet 154 is a circular hole, the width W of the inlet and outlet 154 is the aperture of the circular hole (as shown in Figure 8).
在一些实施方式中，腔体153设置有多个，多个腔体153环绕离心转盘130设置，每个腔体153设置有至少一个进出口154和至少一个压电振动片152。In some embodiments, a plurality of cavities 153 are provided, and the plurality of cavities 153 are arranged around the centrifugal turntable 130 . Each cavity 153 is provided with at least one inlet and outlet 154 and at least one piezoelectric vibrating piece 152 .
具体地，如图9和10所示，通过设置腔体153有多个，多个腔体153环绕离心转盘130设置，每个腔体153设置有至少一个进出口154和至少一个压电振动片152，从而产生合成射流并使合成射流喷出至离心转盘130边缘处以加强液膜的破碎作用，其中，进出口154和压电振动片152的数量可根据实际需要设置。Specifically, as shown in Figures 9 and 10, a plurality of cavities 153 are provided, and the plurality of cavities 153 are arranged around the centrifugal turntable 130. Each cavity 153 is provided with at least one inlet and outlet 154 and at least one piezoelectric vibration plate 152, thereby generating a synthetic jet and making the synthetic jet spray to the edge of the centrifugal turntable 130 to enhance the breaking effect of the liquid film, wherein the number of the inlet and outlet 154 and the piezoelectric vibration plate 152 can be set according to actual needs.
在一些实施方式中，离心转盘130的上方和/或下方设置有至少一个合成射流激励器150。In some embodiments, at least one synthetic jet actuator 150 is disposed above and/or below the centrifugal disk 130 .
具体地，在离心转盘130的上方和/或下方设置有至少一个合成射流激励器150，均可以实现合成射流加强液膜的破碎作用。Specifically, at least one synthetic jet actuator 150 is disposed above and/or below the centrifugal turntable 130 , and both can realize the synthetic jet-enhanced liquid film breaking effect.
例如，可以仅在离心转盘130的上方或仅在离心转盘130的下方设置合成射流激励器150，也可以在离心转盘130的上方和下方均设置有合成射流激励器150。For example, the synthetic jet actuator 150 may be disposed only above the centrifugal turntable 130 or only below the centrifugal turntable 130 , or the synthetic jet actuator 150 may be disposed both above and below the centrifugal turntable 130 .
具体地，当在离心转盘130的上方和下方均设置有合成射流激励器150的时候，在实际使用时，可以使离心转盘130上方的合成射流激励器150的进出口154的位置和离心转盘130下方的合成射流激励器150的进出口154的位置稍微错开，或者使离心转盘130上方的合成射流激励器150和离心转盘130下方的合成射流激励器150之间的频率和/或激励信号相位差不同，从而产生合成射流并使合成射流喷出至离心转盘130边缘处，进一步加强液膜的破碎作用。Specifically, when synthetic jet actuators 150 are provided above and below the centrifugal turntable 130, in actual use, the positions of the inlet and outlet 154 of the synthetic jet actuator 150 above the centrifugal turntable 130 and the inlet and outlet 154 of the synthetic jet actuator 150 below the centrifugal turntable 130 can be slightly staggered, or the frequency and/or excitation signal phase difference between the synthetic jet actuator 150 above the centrifugal turntable 130 and the synthetic jet actuator 150 below the centrifugal turntable 130 can be different, thereby generating a synthetic jet and making the synthetic jet ejected to the edge of the centrifugal turntable 130, further enhancing the breakup effect of the liquid film.
其中，当合成射流激励器150设置有多个，且为偶数时，相邻的合成射流激励器150的压电振动片152的激励信号相位差均为90°或者均为180°，也即使得相邻的合成射流激励器150的压电振动片152的振动方向不同步，从而加强合成射流对离心转盘130边缘处的液膜的扰动作用，有利于强化离心雾化效果。Among them, when there are multiple synthetic jet actuators 150 and they are an even number, the phase difference of the excitation signals of the piezoelectric vibration pieces 152 of adjacent synthetic jet actuators 150 is 90° or 180°, that is, the vibration directions of the piezoelectric vibration pieces 152 of adjacent synthetic jet actuators 150 are not synchronized, thereby strengthening the disturbance effect of the synthetic jet on the liquid film at the edge of the centrifugal turntable 130, which is beneficial to enhancing the centrifugal atomization effect.
在一些实施方式中，离心转盘130的下方设置有至少一个合成射流激励器150，离心转盘130边缘位置向下投影落在设置在离心转盘130下方的其中一个合成射流激励器150的进出口154上并偏向离心转盘130的中心轴线。In some embodiments, at least one synthetic jet actuator 150 is disposed below the centrifugal turntable 130 , and the edge of the centrifugal turntable 130 is projected downward onto the inlet and outlet 154 of one of the synthetic jet actuators 150 disposed below the centrifugal turntable 130 and is biased toward the central axis of the centrifugal turntable 130 .
具体地，离心转盘130边缘位置向下的投影为一个圆周线（以下称之为投影线）；若设置在离心转盘130下方的合成射流激励器150的进出口154为环形的进出口154，则离心转盘130边缘位置向下投影落在设置在离心转盘130下方的合成射流激励器150的进出口154上并偏向离心转盘130的中心轴线是指投影线位于进出口154的中心圆环线（即，与环形的进出口154的内圆周和外圆周距离相等且同心的圆环线）的内侧；若设置在离心转盘130下方的合成射流激励器150设置有多个呈环形排布的进出口154，则离心转盘130边缘位置向下投影落在设置在离心转盘130下方的合成射流激励器150的进出口154上并偏向离心转盘130的中心轴线是指投影线位于这些进出口154的圆环分布基线（为各进出口154的中心所在的圆环线）的内侧。当离心转盘130边缘位置向下投影落在设置在离心转盘130下方的合成射流激励器150的进出口154上并偏向离心转盘130的中心轴线时，可以使合成射流更好地对离心转盘130边缘的液膜产生扰动。Specifically, the downward projection of the edge of the centrifugal turntable 130 is a circular line (hereinafter referred to as the projection line); if the inlet and outlet 154 of the synthetic jet actuator 150 disposed below the centrifugal turntable 130 is an annular inlet and outlet 154, then the downward projection of the edge of the centrifugal turntable 130 falls on the inlet and outlet 154 of the synthetic jet actuator 150 disposed below the centrifugal turntable 130 and deviates toward the central axis of the centrifugal turntable 130, which means that the projection line is located at the central circular line of the inlet and outlet 154 (that is, the projection line is aligned with the annular inlet and outlet 154). If the synthetic jet actuator 150 disposed below the centrifugal turntable 130 is provided with a plurality of inlets and outlets 154 arranged in an annular pattern, the projection line of the edge of the centrifugal turntable 130 falling on the inlets and outlets 154 of the synthetic jet actuator 150 disposed below the centrifugal turntable 130 and deviating from the central axis of the centrifugal turntable 130 means that the projection line is located inside the annular distribution baseline of these inlets and outlets 154 (the annular line where the center of each inlet and outlet 154 is located). When the projection line of the edge of the centrifugal turntable 130 falls on the inlets and outlets 154 of the synthetic jet actuator 150 disposed below the centrifugal turntable 130 and deviates from the central axis of the centrifugal turntable 130, the synthetic jet can better disturb the liquid film at the edge of the centrifugal turntable 130.
在一些实施例中，离心转盘130的上方设置有合成射流激励器150，设置在离心转盘130上方的合成射流激励器150设置在导流嘴120的外侧，且设置在离心转盘130上方的合成射流激励器150的压电振动片152设置在靠近导流嘴120的一侧的侧面上。In some embodiments, a synthetic jet actuator 150 is disposed above the centrifugal turntable 130, the synthetic jet actuator 150 disposed above the centrifugal turntable 130 is disposed on the outside of the guide nozzle 120, and the piezoelectric vibration piece 152 of the synthetic jet actuator 150 disposed above the centrifugal turntable 130 is disposed on the side surface close to the guide nozzle 120.
具体地，如图11和图12所示，当合成射流激励器150不工作时，压电振动片152处于静止位置；当合成射流激励器150工作时，激励信号发生器151发出控制信号，在一个工作周期内，压电振动片152往前振动时（即向靠近导流嘴120的方向振动，如图12中导流嘴120左侧的压电振动片152所示的右侧虚线，或者如图12中导流嘴120右侧的压电振动片152所示的左侧虚线），空腔155体积增大，雾化室110中的气体从进出口154进入空腔155中，实现空腔155的吸气，空腔155吸气过程一直持续到压电振动片152往前振动的最大幅值处；随后压电振动片152开始往后振动（即向远离导流嘴120的方向振动，如图12中导流嘴120左侧的压电振动片152所示的左侧虚线，如图12中导流嘴120右侧的压电振动片152所示的右侧虚线），此时空腔155的体积减小，空腔155内的气体通过进出口154喷出，形成合成射流，空腔155的喷气一直持续到压电振动片152向后振动的最大幅值处（即向远离导流嘴120的方向振动，如图12中导流嘴120左侧的压电振动片152所示的左侧虚线，或者如图12中导流嘴120右侧的压电振动片152所示的右侧虚线），然后又开始往前振动，以此循环，从而实现空腔155周期性的排气及吸气动作，空腔155周期性的排气和吸气动作可以产生合成射流，合成射流为不连续的周期性流动射流，可以有效产生扰动作用。Specifically, as shown in Figures 11 and 12, when the synthetic jet actuator 150 is not working, the piezoelectric vibration piece 152 is in a static position; when the synthetic jet actuator 150 is working, the excitation signal generator 151 sends a control signal. Within a working cycle, when the piezoelectric vibration piece 152 vibrates forward (i.e., vibrates in a direction close to the guide nozzle 120, as shown by the right dotted line of the piezoelectric vibration piece 152 on the left side of the guide nozzle 120 in Figure 12, or as shown by the left dotted line of the piezoelectric vibration piece 152 on the right side of the guide nozzle 120 in Figure 12), the volume of the cavity 155 increases, and the gas in the atomization chamber 110 enters the cavity 155 from the inlet and outlet 154, thereby realizing the suction of the cavity 155. The suction process of the cavity 155 continues until the maximum amplitude of the piezoelectric vibration piece 152 vibrates forward; then the piezoelectric vibration piece 152 begins to vibrate backward (i.e., vibrates in a direction away from the guide nozzle 120, as shown in Figure 12 12 ), at this time, the volume of the cavity 155 is reduced, and the gas in the cavity 155 is ejected through the inlet and outlet 154 to form a synthetic jet. The jet of the cavity 155 continues until the piezoelectric vibrating piece 152 vibrates backwards with the maximum amplitude (i.e., vibrates in the direction away from the flow guide nozzle 120, as shown by the left dotted line of the piezoelectric vibrating piece 152 on the left side of the flow guide nozzle 120 in FIG. 12 , or the right dotted line of the piezoelectric vibrating piece 152 on the right side of the flow guide nozzle 120 in FIG. 12 ), and then starts to vibrate forward again, and the cycle is repeated to achieve periodic exhaust and intake actions of the cavity 155. The periodic exhaust and intake actions of the cavity 155 can generate a synthetic jet. The synthetic jet is a discontinuous periodic flow jet, which can effectively generate a disturbance effect.
在一些实施例中，设置在离心转盘130上方的合成射流激励器150与导流嘴120之间设置有分隔筒套163，分隔筒套163与导流嘴120同轴设置，分隔筒套163与导流嘴120的外周面围成第一流道，分隔筒套163与设置在离心转盘130上方的合成射流激励器150的设置有压电振动片152的侧面围成第二流道，第一流道的入口和第二流道的入口均与一气流分配室164连通，气流分配室164用于连通雾化室110的气流循环系统并向第一流道和第二流道提供气流，第一流道的出口和第二流道的出口均朝向离心转盘130。In some embodiments, a separation sleeve 163 is arranged between the synthetic jet actuator 150 arranged above the centrifugal turntable 130 and the guide nozzle 120. The separation sleeve 163 is coaxially arranged with the guide nozzle 120. The separation sleeve 163 and the outer peripheral surface of the guide nozzle 120 form a first flow channel. The separation sleeve 163 and the side of the synthetic jet actuator 150 arranged above the centrifugal turntable 130 on which the piezoelectric vibration piece 152 is provided form a second flow channel. The inlet of the first flow channel and the inlet of the second flow channel are both connected to an airflow distribution chamber 164. The airflow distribution chamber 164 is used to connect to the airflow circulation system of the atomization chamber 110 and provide airflow to the first flow channel and the second flow channel. The outlet of the first flow channel and the outlet of the second flow channel are both facing the centrifugal turntable 130.
具体地，通过在离心转盘130上方的合成射流激励器150与导流嘴120之间设置有分隔筒套163以形成第一流道和第二流道，并且第一流道的出口和第二流道的出口均朝向离心转盘130，从而使第一流道和第二流道的气流均吹向离心转盘130表面，为离心转盘130旋转驱动的卷吸气流进行补气，同时对离心转盘130表面的熔融状态金属液体膜产生一定的扰动作用，有利于提高离心雾化效果。其中，由于气流分配室164连通雾化室110的气流循环系统，即使用雾化室110中的气体（具体有一定温度），可以降低第一流道和第二流道吹出的气流对离心转盘130表面熔融状态金属液体膜的冷却作用，以保证离心转盘130上的金属熔体的过热度。Specifically, a separation sleeve 163 is provided between the synthetic jet actuator 150 and the guide nozzle 120 above the centrifugal turntable 130 to form a first flow channel and a second flow channel, and the outlet of the first flow channel and the outlet of the second flow channel are both oriented toward the centrifugal turntable 130, so that the airflows of the first flow channel and the second flow channel are both blown toward the surface of the centrifugal turntable 130, replenishing the air for the entrained airflow driven by the rotation of the centrifugal turntable 130, and at the same time generating a certain disturbance effect on the molten metal liquid film on the surface of the centrifugal turntable 130, which is beneficial to improving the centrifugal atomization effect. Among them, since the airflow distribution chamber 164 is connected to the airflow circulation system of the atomization chamber 110, that is, using the gas in the atomization chamber 110 (specifically having a certain temperature), the cooling effect of the airflow blown out of the first flow channel and the second flow channel on the molten metal liquid film on the surface of the centrifugal turntable 130 can be reduced to ensure the superheat of the metal melt on the centrifugal turntable 130.
其中，雾化室110的气流循环系统包括第一收粉罐171、第二收粉罐172、第三收粉罐173、旋风分离器174、除尘器175、引风机176和第一回风机177；The air circulation system of the atomizing chamber 110 includes a first powder collecting tank 171, a second powder collecting tank 172, a third powder collecting tank 173, a cyclone separator 174, a dust collector 175, an induced draft fan 176 and a first return air fan 177;
第一收粉罐171设置在雾化室110的出口的下方且与雾化室110出口连通，雾化室110的侧方通过第一管道与旋风分离器174连通，旋风分离器174的下方设置有第二收粉罐172，旋风分离器174的上方通过第二管道与除尘器175连通，第三收粉罐173设置在除尘器175的下方，除尘器175的侧方设置有第一开口与引风机176连通，第一回风机177与除尘器175连通；The first powder collecting tank 171 is arranged below the outlet of the atomizing chamber 110 and is communicated with the outlet of the atomizing chamber 110. The side of the atomizing chamber 110 is communicated with the cyclone separator 174 through the first pipeline. The second powder collecting tank 172 is arranged below the cyclone separator 174. The top of the cyclone separator 174 is communicated with the dust collector 175 through the second pipeline. The third powder collecting tank 173 is arranged below the dust collector 175. The side of the dust collector 175 is provided with a first opening that is communicated with the induced draft fan 176. The first return air fan 177 is communicated with the dust collector 175.
第一收粉罐171用于收集雾化室110中的粗粒径粉末，第二收粉罐172用于收集旋风分离器174中的细粒径粉末，第三收粉罐173用于收集除尘器175中的超细粒径粉末，引风机176用于对雾化室110的排气提供流动的抽吸力，第一回风机177用于将除尘器175排出的气体进行升压并通过第三管道178与气流分配室164的入口连通；其中，粗粒径粉末的平均粒径比细粒径粉末大，细粒径粉末的平均粒径比超细粒径粉末大。The first powder collecting tank 171 is used to collect coarse-grained powder in the atomization chamber 110, the second powder collecting tank 172 is used to collect fine-grained powder in the cyclone separator 174, the third powder collecting tank 173 is used to collect ultra-fine-grained powder in the dust collector 175, the induced draft fan 176 is used to provide flow suction force for the exhaust of the atomization chamber 110, and the first return air fan 177 is used to increase the pressure of the gas discharged from the dust collector 175 and connect it to the inlet of the air flow distribution chamber 164 through the third pipe 178; wherein the average particle size of the coarse-grained powder is larger than that of the fine-grained powder, and the average particle size of the fine-grained powder is larger than that of the ultra-fine-grained powder.
在一些实施例中，设置在离心转盘130上方的合成射流激励器150的空腔155与气流分配室164连通。In some embodiments, the cavity 155 of the synthetic jet actuator 150 disposed above the centrifugal disk 130 is in communication with the air flow distribution chamber 164 .
具体地，当合成射流激励器150不工作时，可以通过气流分配室164向合成射流激励器150的空腔155中提供气流，气流从进出口154喷出，从而对离心转盘130边缘的液膜产生扰动作用。Specifically, when the synthetic jet actuator 150 is not working, airflow can be provided to the cavity 155 of the synthetic jet actuator 150 through the airflow distribution chamber 164, and the airflow is ejected from the inlet and outlet 154, thereby disturbing the liquid film at the edge of the centrifugal turntable 130.
在一些实施例中，设置在离心转盘130上方的合成射流激励器150的压电振动片152的形状为环形，压电振动片152环绕导流嘴120的外周面设置。In some embodiments, the piezoelectric vibration piece 152 of the synthetic jet actuator 150 disposed above the centrifugal turntable 130 is in a ring shape, and the piezoelectric vibration piece 152 is disposed around the outer circumference of the guide nozzle 120 .
具体地，为了减少压电振动片152设置的个数，将设置在离心转盘130上方的合成射流激励器150的压电振动片152的形状设置为环形，并且压电振动片152环绕导流嘴120的外周面设置，从而实现设置在离心转盘130上方的合成射流激励器150对离心转盘130边缘处的液膜产生扰动作用。Specifically, in order to reduce the number of piezoelectric vibration pieces 152, the shape of the piezoelectric vibration piece 152 of the synthetic jet actuator 150 arranged above the centrifugal turntable 130 is set to be ring-shaped, and the piezoelectric vibration piece 152 is arranged around the outer peripheral surface of the guide nozzle 120, so that the synthetic jet actuator 150 arranged above the centrifugal turntable 130 can disturb the liquid film at the edge of the centrifugal turntable 130.
在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.
以上所述仅为本申请的实施例而已，并不用于限制本申请的保护范围，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410777270.7ACN118357470B (en) | 2024-06-17 | 2024-06-17 | Synthetic jet auxiliary centrifugal atomizing equipment |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410777270.7ACN118357470B (en) | 2024-06-17 | 2024-06-17 | Synthetic jet auxiliary centrifugal atomizing equipment |
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| CN118357470Atrue CN118357470A (en) | 2024-07-19 |
| CN118357470B CN118357470B (en) | 2024-09-10 |
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| CN202410777270.7AActiveCN118357470B (en) | 2024-06-17 | 2024-06-17 | Synthetic jet auxiliary centrifugal atomizing equipment |
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| CN118635516A (en)* | 2024-08-13 | 2024-09-13 | 季华实验室 | A centrifugal fiber jet atomization device and a centrifugal drum design method |
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| CN113059169A (en)* | 2021-03-18 | 2021-07-02 | 中国科学院力学研究所 | Device for producing high-temperature metal powder by adopting turntable centrifugal atomization method |
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