技术领域technical field
本发明涉及一种无阀压电泵，具体地说，是一种基于仿生型柔性尾鳍压电振子的变腔体无阀压电泵。The invention relates to a valveless piezoelectric pump, in particular to a variable cavity valveless piezoelectric pump based on a bionic flexible caudal fin piezoelectric vibrator.
背景技术Background technique
现有的压电泵中，大多为方形泵，不利于在滴灌中应用，而圆形泵多为阻流体无阀泵、有阀泵，结构体积较大，而压电振子多采用周边固支，存在振幅小、泵送流量小的问题，虽然压电叠堆泵使振子振幅有所增加，但多需要采用多级杠杆放大机构，放大效果不明显，同时造成体积较大，不利于泵的微小化，而对于现有双晶片压电振子尾鳍，多采用长方形，泵送流量虽然增大，但混合搅拌效果不好，泵送流量仍有待提高。Most of the existing piezoelectric pumps are square pumps, which are not conducive to the application in drip irrigation, while the circular pumps are mostly non-valve pumps and valve pumps with bleeders, and the structure is relatively large, while the piezoelectric vibrator mostly adopts peripheral fixed supports , there are problems of small amplitude and small pumping flow rate. Although the piezoelectric stack pump increases the vibration amplitude of the vibrator, it usually needs to use a multi-stage lever amplification mechanism. The amplification effect is not obvious, and at the same time it causes a large volume, which is not conducive to the pump Miniaturization, and for the tail fin of the existing bimorph piezoelectric vibrator, the rectangular shape is mostly used. Although the pumping flow rate is increased, the mixing and stirring effect is not good, and the pumping flow rate still needs to be improved.
发明内容Contents of the invention
本发明针对上述目前的压电泵存在的问题，提出一种泵送量大、体积小、搅拌效果好、利于在滴灌中使用的无阀压电泵。Aiming at the above-mentioned problems existing in the current piezoelectric pump, the present invention proposes a valveless piezoelectric pump with large pumping capacity, small volume, good stirring effect and favorable use in drip irrigation.
本发明的变腔体无阀压电泵，包括泵体以及横向安装在泵体的内腔中的压电振子，所述泵体的前端和后端分别设置进液口和出液口。The variable cavity valveless piezoelectric pump of the present invention includes a pump body and a piezoelectric vibrator installed laterally in the inner cavity of the pump body. The front end and the rear end of the pump body are respectively provided with a liquid inlet and a liquid outlet.
所述泵体的内腔中安装有内芯，所述内芯的外壁贴到所述泵体的内壁上，所述内芯横向设置有泵送通道，所述泵送通道的纵截面积小于所述泵体内腔的纵截面积，所述泵送通道的后端与出液口间隔设置。An inner core is installed in the inner cavity of the pump body, the outer wall of the inner core is attached to the inner wall of the pump body, and the inner core is provided with a pumping channel transversely, and the longitudinal sectional area of the pumping channel is less than The longitudinal sectional area of the inner cavity of the pump, the rear end of the pumping channel and the liquid outlet are arranged at intervals.
所述压电振子包括板状的振子基体，所述振子基体的上表面和下表面都安装有压电陶瓷，所述振子基体前端通过支架固定在泵体的内腔中。The piezoelectric vibrator includes a plate-shaped vibrator base, piezoelectric ceramics are installed on the upper surface and the lower surface of the vibrator base, and the front end of the vibrator base is fixed in the inner cavity of the pump body through a bracket.
优选的是，所述振子基体后端安装有柔性尾鳍，所述柔性尾鳍的宽度自前向后逐渐增大。Preferably, a flexible tail fin is installed at the rear end of the vibrator base, and the width of the flexible tail fin gradually increases from front to back.
优选的是，所述泵送通道自前向后分为多个泵送段，其中一个泵送段的纵截面积均小于后侧相邻的另一个泵送段的纵截面积。Preferably, the pumping channel is divided into a plurality of pumping sections from front to back, wherein the longitudinal sectional area of one pumping section is smaller than the longitudinal sectional area of another adjacent pumping section on the rear side.
优选的是，所述泵体内腔的横截面为圆形或椭圆形，所述泵送通道的横截面为矩形。Preferably, the inner chamber of the pump body has a circular or elliptical cross section, and the pumping channel has a rectangular cross section.
优选的是，所述内芯位于泵体的中部，将泵体的内腔前后分为第一内腔和第二内腔。Preferably, the inner core is located in the middle of the pump body, and divides the inner cavity of the pump body into a first inner cavity and a second inner cavity.
优选的是，所述泵体包括主体以及分别安装在主体两端设置的开口上的两个端盖，所述进液口和出液口分别设置在位于前端的端盖上和位于后端的端盖上。Preferably, the pump body includes a main body and two end covers respectively installed on the openings provided at both ends of the main body, and the liquid inlet and liquid outlet are respectively arranged on the end cover at the front end and the end cover at the rear end. cover.
优选的是，进一步包括泵座，所述泵体为圆柱形，穿入并固定在泵座设置的固定孔中。Preferably, it further includes a pump base, the pump body is cylindrical, penetrates and is fixed in a fixing hole provided on the pump base.
本发明的有益效果是：变腔体无阀压电泵内部设置空间较小的泵送通道，使液体进入泵体内后，能够使流体由小空间进入大空间，减小了流体阻力，利于流体流动，提高泵送量。The beneficial effects of the present invention are: a variable cavity valveless piezoelectric pump is provided with a pumping channel with a small space inside, so that after the liquid enters the pump body, the fluid can enter a large space from a small space, which reduces the fluid resistance and facilitates the flow of fluid. Flow, increase pumping capacity.
压电振子安装柔性尾鳍，活动幅度大，并且具有较大的宽度，能够在不增加压电振子体积的情况下，提高泵送能力。The piezoelectric vibrator is equipped with a flexible tail fin, which has a large range of activities and a large width, which can improve the pumping capacity without increasing the volume of the piezoelectric vibrator.
泵送通道内形成空间逐渐增大的结构，减小流体阻力，增加泵送量。空间较大的内腔采用圆形，空间较小的泵送通道采用方形，进一步增加流体流动空间变化时的变化程度，更加有利于流体的混合或泵送。而且泵送通道采用方形，使泵送通道内壁与压电振子的距离较近，增加流体被搅拌混合的效果。A structure with gradually increasing space is formed in the pumping channel to reduce fluid resistance and increase pumping volume. The inner cavity with a larger space adopts a circular shape, and the pumping channel with a smaller space adopts a square shape, which further increases the degree of change when the fluid flow space changes, and is more conducive to mixing or pumping of the fluid. Moreover, the pumping channel adopts a square shape, so that the distance between the inner wall of the pumping channel and the piezoelectric vibrator is relatively close, and the effect of stirring and mixing the fluid is increased.
内芯将泵体内分为三段，使流体能够由大空间先进入小空间，提高搅拌混合效果。The inner core divides the pump body into three sections, so that the fluid can enter the small space from the large space first, and improve the stirring and mixing effect.
进液口和出液口设置在端盖上，使泵体通过端盖能够打开，便于内部结构的安装。泵体采用圆形，体积小，便于适用到滴灌中，泵体固定在泵座上，使其能够在平面上稳定放置。The liquid inlet and the liquid outlet are arranged on the end cover, so that the pump body can be opened through the end cover, which is convenient for the installation of the internal structure. The pump body is circular and small in size, which is convenient for drip irrigation. The pump body is fixed on the pump base so that it can be placed stably on a plane.
附图说明Description of drawings
附图1为变腔体无阀压电泵的结构示意图一；Accompanying drawing 1 is the structural schematic diagram 1 of variable cavity valveless piezoelectric pump;
附图2为变腔体无阀压电泵的结构示意图二；Accompanying drawing 2 is the structure schematic diagram II of variable cavity valveless piezoelectric pump;
附图3为变腔体无阀压电泵的结构示意图三；Accompanying drawing 3 is the structural schematic diagram three of variable chamber valveless piezoelectric pumps;
附图4为压电振子的结构示意图。Accompanying drawing 4 is the structure diagram of piezoelectric vibrator.
具体实施方式Detailed ways
为了能进一步了解本发明的结构、特征及其它目的，现结合所附较佳实施例详细说明如下，所说明的较佳实施例仅用于说明本发明的技术方案，并非限定本发明。In order to further understand the structure, features and other purposes of the present invention, the detailed description is as follows in conjunction with the attached preferred embodiments. The described preferred embodiments are only used to illustrate the technical solutions of the present invention, not to limit the present invention.
本发明的具体实施方式如下：The specific embodiment of the present invention is as follows:
如图1至3所示，变腔体无阀压电泵包括泵体1以及横向安装在泵体1的内腔中的压电振子2。As shown in FIGS. 1 to 3 , the variable cavity valveless piezoelectric pump includes a pump body 1 and a piezoelectric vibrator 2 installed laterally in the inner cavity of the pump body 1 .
泵体1的前端和后端分别设置进液口11和出液口12。The front end and the rear end of the pump body 1 are respectively provided with a liquid inlet 11 and a liquid outlet 12 .
泵体1的内腔中安装有内芯3，内芯3的外壁贴到泵体1的内壁上。An inner core 3 is installed in the inner cavity of the pump body 1 , and the outer wall of the inner core 3 is attached to the inner wall of the pump body 1 .
内芯3横向设置有泵送通道4，泵送通道4前端与进液口11对齐，后端与出液口12对齐。泵送通道4的纵截面积小于泵体1内腔的纵截面积，泵送通道4的后端与出液口12间隔设置。The inner core 3 is horizontally provided with a pumping channel 4 , the front end of the pumping channel 4 is aligned with the liquid inlet 11 , and the rear end of the pumping channel 4 is aligned with the liquid outlet 12 . The longitudinal sectional area of the pumping channel 4 is smaller than that of the inner cavity of the pump body 1 , and the rear end of the pumping channel 4 is spaced from the liquid outlet 12 .
如图4所示，压电振子2包括板状的振子基体21，振子基体21的上表面和下表面都安装有压电陶瓷22。As shown in FIG. 4 , the piezoelectric vibrator 2 includes a plate-shaped vibrator base 21 , and piezoelectric ceramics 22 are installed on both the upper surface and the lower surface of the vibrator base 21 .
振子基体21前端通过支架23固定在泵体1的内腔中，中部位于泵送通道4内。The front end of the vibrator base 21 is fixed in the inner cavity of the pump body 1 through the bracket 23 , and the middle part is located in the pumping channel 4 .
通过逆压电效应，压电陶瓷22带动振子基体21产生弯曲变形，上下摆动，拨动泵体1内的流体。Through the inverse piezoelectric effect, the piezoelectric ceramic 22 drives the vibrator base 21 to produce bending deformation, swing up and down, and stir the fluid in the pump body 1 .
流体从进液口11进入到泵体1内的泵送通道4中，通过压电振子2的作用下，再进入泵体1后部的内腔，最后通过出液口12泵出。The fluid enters the pumping channel 4 in the pump body 1 from the liquid inlet 11 , and then enters the inner cavity at the rear of the pump body 1 under the action of the piezoelectric vibrator 2 , and is finally pumped out through the liquid outlet 12 .
流体在泵体1内自前向后流动的过程中，先在空间较小的泵送通道4中流通，然后进入空间较大的泵提1后部的内腔，使流体流经的空间变大，减小流体流动的阻力，利于流体流动，增加流体通过出液口12泵出的速度，从而增加压电泵的泵送量。When the fluid flows from front to back in the pump body 1, it first circulates in the pumping channel 4 with a small space, and then enters the inner cavity at the rear of the pump lift 1 with a large space, so that the space through which the fluid flows becomes larger , reduce the resistance of the fluid flow, facilitate the fluid flow, increase the speed at which the fluid is pumped through the liquid outlet 12, thereby increasing the pumping volume of the piezoelectric pump.
为了进一步提高泵送效果，振子基体21后端安装有柔性尾鳍24，柔性尾鳍24质地较为柔软，振子基体21上下摆动的情况下，柔性尾鳍24也随之上下摆动，并且摆动幅度大于振子基体21，提高流体被拨动的程度，从而增加流体向后流动的速度。In order to further improve the pumping effect, a flexible tail fin 24 is installed at the rear end of the vibrator base 21. The flexible tail fin 24 is relatively soft in texture. , increasing the degree to which the fluid is tossed, thereby increasing the speed at which the fluid flows backwards.
柔性尾鳍24的宽度自前向后逐渐增大，使柔性尾鳍24具有较大的面积，进一步提高了其对流体拨动的程度。The width of the flexible caudal fin 24 gradually increases from front to rear, so that the flexible caudal fin 24 has a larger area, further improving its ability to move the fluid.
泵送通道4自前向后分为多个泵送段41，其中一个泵送段41的纵截面积均小于后侧相邻的另一个泵送段41的纵截面积。The pumping passage 4 is divided into a plurality of pumping sections 41 from front to back, and the longitudinal sectional area of one pumping section 41 is smaller than that of the other adjacent pumping section 41 on the rear side.
泵送通道4内自前向后，空间逐段增大，使流体在泵送通道4内的流动阻力逐段减小，流体的流速逐段加快。也使泵送通道4前段的泵送段41空间较小，能够使流体汇聚到较小的空间，进行混合，增强压电泵的搅拌性能。The space in the pumping channel 4 increases step by step from front to back, so that the flow resistance of the fluid in the pumping channel 4 decreases step by step, and the flow velocity of the fluid increases step by step. The space of the pumping section 41 in the front section of the pumping channel 4 is also made smaller, so that the fluid can be gathered in a smaller space for mixing, and the stirring performance of the piezoelectric pump can be enhanced.
泵体1内腔的横截面为圆形或椭圆形，泵送通道4的横截面为矩形。流体离开泵送通道4后，进入泵体1内腔，使流体从具有棱角的矩形空间进入到较为平滑的圆形空间，进一步增大流体阻力降低的幅度。The cross section of the inner cavity of the pump body 1 is circular or oval, and the cross section of the pumping channel 4 is rectangular. After the fluid leaves the pumping channel 4, it enters the inner cavity of the pump body 1, so that the fluid enters from the angular rectangular space into a relatively smooth circular space, further increasing the range of fluid resistance reduction.
并且矩形空间的泵送通道4，使泵送通道4内壁各个表面能够最大程度的靠近压电振子2，使泵送通道4内的流体都汇集到压电振子2周围，使压电振子2的运动能够更加明显的作用到流体上，使流体的流动程度更强，增加流体的搅拌程度，从而提高混合搅拌性能。Moreover, the pumping channel 4 in a rectangular space enables each surface of the inner wall of the pumping channel 4 to be close to the piezoelectric vibrator 2 to the greatest extent, so that the fluid in the pumping channel 4 gathers around the piezoelectric vibrator 2, so that the piezoelectric vibrator 2 Movement can act on the fluid more obviously, making the fluid flow stronger and increasing the stirring degree of the fluid, thereby improving the mixing and stirring performance.
为了进一步提高泵的混合搅拌性能，内芯3位于泵体1的中部，将泵体1的内腔前后分为第一内腔13和第二内腔14。In order to further improve the mixing performance of the pump, the inner core 3 is located in the middle of the pump body 1 and divides the inner cavity of the pump body 1 into a first inner cavity 13 and a second inner cavity 14 .
流体从进液口11进入泵体1中，在进入泵送通道4之前，先进入空间较大的泵体1内腔，然后再进入空间较小的泵送通道4。使流体先汇聚后，再进入泵送通道4，使流体能够得以混合，实现搅拌的目的。The fluid enters the pump body 1 from the liquid inlet 11 , and before entering the pumping channel 4 , it first enters the inner cavity of the pump body 1 with a larger space, and then enters the pumping channel 4 with a smaller space. After the fluids converge first, they enter the pumping channel 4, so that the fluids can be mixed to achieve the purpose of stirring.
为了便于装配，泵体1包括主体15以及分别安装在主体15两端设置的开口上的两个端盖16。进液口11和出液口12分别设置在位于前端的端盖16上和位于后端的端盖16上。For ease of assembly, the pump body 1 includes a main body 15 and two end covers 16 respectively mounted on openings provided at two ends of the main body 15 . The liquid inlet 11 and the liquid outlet 12 are respectively arranged on the end cover 16 located at the front end and the end cover 16 located at the rear end.
将端盖16从主体15上拆下，即可将泵体1打开，通过泵体1两端的开口，可拆装内芯3、压电振子2等泵体1内腔中的部件，便于安装和维修。The pump body 1 can be opened by removing the end cover 16 from the main body 15. Through the openings at both ends of the pump body 1, the inner core 3, piezoelectric vibrator 2 and other components in the inner cavity of the pump body 1 can be disassembled for easy installation. and maintenance.
为了减小泵的体积，泵体1为圆柱形，安装在泵座5上。泵体1穿入并固定在泵座5设置的固定孔6中。In order to reduce the volume of the pump, the pump body 1 is cylindrical and installed on the pump base 5 . The pump body 1 penetrates and is fixed in the fixing hole 6 provided on the pump base 5 .
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196779.4ACN106837753B (en) | 2016-12-22 | 2016-12-22 | Become cavity Valveless piezoelectric pump |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196779.4ACN106837753B (en) | 2016-12-22 | 2016-12-22 | Become cavity Valveless piezoelectric pump |
| Publication Number | Publication Date |
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| CN106837753A CN106837753A (en) | 2017-06-13 |
| CN106837753Btrue CN106837753B (en) | 2018-07-13 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201611196779.4AActiveCN106837753B (en) | 2016-12-22 | 2016-12-22 | Become cavity Valveless piezoelectric pump |
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| CN (1) | CN106837753B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196769B (en)* | 2020-09-29 | 2022-11-08 | 长春工业大学 | A valveless piezoelectric pump imitating pectoral fin structure |
| CN112177903A (en)* | 2020-09-29 | 2021-01-05 | 长春工业大学 | Rectangular cavity flexible membrane double-vibrator valveless piezoelectric pump |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3587328A (en)* | 1969-06-05 | 1971-06-28 | Hercules Inc | A fluid-jet deflection type instrument having a diaphragm type pump with piezoelectric actuation |
| US7390294B2 (en)* | 2004-05-28 | 2008-06-24 | Ethicon Endo-Surgery, Inc. | Piezo electrically driven bellows infuser for hydraulically controlling an adjustable gastric band |
| CN101858331B (en)* | 2010-05-18 | 2012-07-04 | 南京航空航天大学 | Valveless piezoelectric stack pump |
| CN104963834B (en)* | 2015-06-30 | 2017-02-01 | 丽水学院 | Oscillating vibrator of piezoelectric pump |
| CN206338175U (en)* | 2016-12-22 | 2017-07-18 | 青岛农业大学 | Become cavity valveless piezoelectric pump |
| Publication number | Publication date |
|---|---|
| CN106837753A (en) | 2017-06-13 |
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