技术领域technical field
本发明属于风机技术领域，特别涉及一种混流风机。The invention belongs to the technical field of fans, in particular to a mixed flow fan.
背景技术Background technique
混流风机广泛用于矿山、纺织、冶金、电站、航空、建筑等行业。混流风机兼具了轴流风机与离心风机的优点，具有高的压力系数和流量系数。混流风机内空气既做离心运动又做轴向运动，由于其独特的结构特点使得内部充满复杂的二次流。Mixed flow fans are widely used in mining, textile, metallurgy, power station, aviation, construction and other industries. The mixed flow fan combines the advantages of the axial flow fan and the centrifugal fan, and has a high pressure coefficient and flow coefficient. The air in the mixed-flow fan is both centrifugal and axial. Due to its unique structural characteristics, the interior is full of complex secondary flows.
混流风机为轴向进气，在叶轮内流动方向发生变化为斜向上流动，流出叶轮后又需要改为轴向进入后导叶或径向进入蜗壳。气流方向改变阻力损失较大。本专利提出的变凹凸性子午流道形状，减少风机流动阻力，消除机匣侧进口漩涡区，提高风机流量和效率。The mixed flow fan adopts axial air intake, and the flow direction in the impeller changes to an oblique upward flow. After flowing out of the impeller, it needs to be changed to axially enter the rear guide vane or radially enter the volute. The resistance loss is greater when the airflow direction changes. The variable concave-convex meridian channel shape proposed in this patent reduces the flow resistance of the fan, eliminates the vortex area at the inlet of the casing side, and improves the flow rate and efficiency of the fan.
后置蜗壳形式的混流风机与离心风机类似，气流流出叶轮方向接近径向。由于使用了蜗壳，径向尺寸增加较多，而且对于许多需要轴向出气的情况，则需要再次改变气流流向，应用局限较大。The mixed flow fan in the form of a rear volute is similar to the centrifugal fan, and the direction of the airflow out of the impeller is close to the radial direction. Due to the use of the volute, the radial dimension increases a lot, and for many situations that require axial air outlet, the air flow direction needs to be changed again, and the application is limited.
后置导叶形式的混流风机，气流流出叶轮方向接近轴向，通常还需要一段弯道将气流完全过渡为轴向然后进入后导叶实现进一步扩压。For mixed-flow fans in the form of rear guide vanes, the direction of the airflow out of the impeller is close to the axial direction. Usually, a bend is required to completely transition the airflow to the axial direction and then enter the rear guide vane to achieve further expansion.
传统混流风机子午流道机匣线轮毂线通常为直线型或圆弧形，直线型子午流道看似流动阻力比较小，但是进口与出口气流都需要进行转向，流道有明显转折，所以流动损失较大。The traditional mixed flow fan meridian channel casing line and hub line are usually straight or arc-shaped. The linear meridian channel seems to have relatively low flow resistance, but both the inlet and outlet airflow need to be turned, and the flow channel has obvious turning points, so the flow Big loss.
圆弧形机匣线轮毂线可以在叶轮内实现一定的气流转向作用。但是对于后置导叶型混流风机，为了使气流流出叶轮后尽可能接近轴向，圆弧形机匣线轮毂线出口为轴向。对于叶轮进出口直径变化较大的高压力混流风机，圆弧形机匣线轮毂线出口为轴向，则进口与轴夹角较大，气流流进叶轮后在机匣则容易形成低速涡流区，削弱叶轮做功能力。The arc-shaped casing wire hub wire can realize a certain airflow turning effect in the impeller. But for the rear guide vane type mixed flow fan, in order to make the air flow out of the impeller as close as possible to the axial direction, the outlet of the arc-shaped casing line and the hub line is axial. For high-pressure mixed-flow fans with large changes in the diameter of the impeller inlet and outlet, the arc-shaped case line and the hub line exit are axial, so the angle between the inlet and the shaft is relatively large, and after the airflow flows into the impeller, it is easy to form a low-speed vortex area in the case , weaken the impeller work ability.
发明内容Contents of the invention
本发明的目的在于提供一种混流风机，以解决上述问题。The object of the present invention is to provide a mixed flow fan to solve the above problems.
为实现上述目的，本发明采用以下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
一种混流风机，包括电机、机匣、叶轮、导叶和集流器；机匣一端的内侧同轴固定设置有导叶，电机设置在导叶的轮毂中心；电机的输出轴固定连接叶轮的中心；机匣的另一端内侧设置有集流器，集流器与叶轮同侧；导叶的轮毂与叶轮的轮毂直径相同；A mixed flow fan, including a motor, casing, impeller, guide vanes and a current collector; guide vanes are coaxially fixed on the inner side of one end of the casing, and the motor is arranged at the center of the hub of the guide vanes; the output shaft of the motor is fixedly connected to the hub of the impeller center; the inner side of the other end of the casing is provided with a current collector, which is on the same side as the impeller; the diameter of the hub of the guide vane is the same as that of the impeller;
叶轮上等间距设置有若干叶片，叶片沿着叶轮的轮毂线设置；叶片相对于轮毂的边缘为两段凹凸性相反的相切圆弧，靠近集流器的一段为下凹段，另一段为上凸段，下凹段的圆弧与上凸段的圆弧的半径比为1：2。There are several blades arranged at equal intervals on the impeller, and the blades are arranged along the hub line of the impeller; the edges of the blades relative to the hub are two sections of tangent arcs with opposite concavity and convexity, and the section near the collector is a concave section, and the other section is The radius ratio of the arcs of the upper convex section and the lower concave section to the arc of the upper convex section is 1:2.
进一步的，靠近集流器一端的叶片高度与另一端的叶片高度之比为1.35。Further, the ratio of the blade height at one end near the current collector to the blade height at the other end is 1.35.
进一步的，集流器内侧壁为圆弧型，集流器内壁与机匣的内壁相切。Further, the inner wall of the current collector is arc-shaped, and the inner wall of the current collector is tangent to the inner wall of the casing.
进一步的，集流器外径与机匣内径配合，集流器外侧边缘设置有集流器定位销，通过集流器定位销轴向限位。Further, the outer diameter of the current collector matches the inner diameter of the casing, and the outer edge of the current collector is provided with a current collector positioning pin, which is axially limited by the current collector positioning pin.
进一步的，叶轮叶片靠近集流器一侧的边缘线前倾，并延转动方向前弯。Further, the edge line of the impeller blade near the side of the collector is inclined forward, and is bent forward along the direction of rotation.
进一步的，叶轮叶片的另一侧边缘线与电机的输出轴垂直。Further, the edge line on the other side of the impeller blade is perpendicular to the output shaft of the motor.
进一步的，电机通过电机固定架固定设置在导叶的轮毂中心；电机的输出轴通过叶轮定位螺母与叶轮的轮毂中心固定连接；叶轮的轮毂为中空半弧形。Further, the motor is fixedly arranged at the center of the hub of the guide vane through the motor fixing bracket; the output shaft of the motor is fixedly connected with the center of the hub of the impeller through the positioning nut of the impeller; the hub of the impeller is hollow and semi-arc.
进一步的，叶轮叶片数为10，导叶叶片数为13。Further, the number of impeller blades is 10, and the number of guide vane blades is 13.
与现有技术相比，本发明有以下技术效果：Compared with the prior art, the present invention has the following technical effects:
本发明提出的变凹凸性机匣线由一段下凹圆弧与一段上凸圆弧相切组成，这样保证了进口处和出口处与转轴的夹角为零，同时能保证叶轮进出口有较大的直径差，充分利用离心力增大气流压力。采用这种设计，减少了非做功区域的体积，气流轴向进气，在叶轮内获得能量，并由斜上流动转为轴向流动，然后在导叶内，气流的一部份动能转化为压力能，提高气流压力。The variable concave-convex casing line proposed by the present invention is composed of a section of concave circular arc and a section of convex circular arc tangent, which ensures that the angle between the inlet and outlet and the rotating shaft is zero, and at the same time can ensure that the inlet and outlet of the impeller have a relatively small gap. The large diameter difference makes full use of the centrifugal force to increase the airflow pressure. With this design, the volume of the non-working area is reduced, the airflow enters the axial direction, obtains energy in the impeller, and changes from oblique upward flow to axial flow, and then in the guide vane, part of the kinetic energy of the airflow is converted into Pressure energy, increase the airflow pressure.
本发明采用后置导叶，较后置蜗壳的径向结构更加紧凑，产品尺寸小。The invention adopts the rear guide vane, which is more compact than the radial structure of the rear volute, and the product size is small.
修改叶轮子午流道形状后，使气流轴向进入后导叶，没有弯道结构，轴向紧凑。After modifying the shape of the meridian channel of the impeller, the air flow enters the rear guide vane axially, without a curved structure, and the axial direction is compact.
风机整体是沿轴向进气，沿轴向出气。更适合应用于管道等直线送风。减少了气流冲击，流动损失小，气流噪声低。The fan as a whole is air intake along the axial direction and air outlet along the axial direction. It is more suitable for straight air supply such as pipelines. The impact of the airflow is reduced, the flow loss is small, and the airflow noise is low.
本发明保证了叶轮子午流道沿流动方向逐渐缩小，能减少流动分离，实现低噪声高效率。The invention ensures that the meridian channel of the impeller gradually shrinks along the flow direction, reduces flow separation, and realizes low noise and high efficiency.
叶轮进出口直径比大，可以有效利用离心力做功，风机增压能力强，可以有效克服流动阻力，可胜任长管道，浮躁流道等场合的送风任务。The diameter ratio of the impeller inlet and outlet is large, which can effectively use the centrifugal force to do work. The fan has a strong pressurization capacity and can effectively overcome the flow resistance.
下凹式圆弧进口段气流进气顺畅，减少了流道机匣侧的低速区。配合圆弧型集流器，流道斜率连续，减少流动阻力，增加风机风量，提高效率。The airflow in the concave arc inlet section is smooth, which reduces the low-speed area on the casing side of the runner. With the arc-shaped current collector, the slope of the flow channel is continuous, which reduces the flow resistance, increases the air volume of the fan, and improves the efficiency.
本发明方案合理，结构简单，容易实现，能充分发挥混流风机的优势。The invention has reasonable scheme, simple structure, easy realization, and can give full play to the advantages of the mixed-flow fan.
附图说明Description of drawings
图1是本发明的侧剖面示意图。Fig. 1 is a schematic side sectional view of the present invention.
图2是本发明的子午流道示意图。Fig. 2 is a schematic diagram of the meridian flow channel of the present invention.
其中：1-集流器，2-机匣，3-叶轮，4-导叶，5-电机，6-电机转轴，7-电机固定架，8-叶轮定位螺母，9-集流器定位销，10-轮盖线，11-叶轮出口，12-导叶进口，13-导叶出口，14-叶轮进口，15-叶轮叶片前缘，16-轮毂线，17-叶轮叶片后缘，18-导叶叶片前缘，19-导叶叶片后缘，20-转轴，21-叶轮叶片，22-导叶叶片。Among them: 1-current collector, 2-casing, 3-impeller, 4-guide vane, 5-motor, 6-motor shaft, 7-motor fixing frame, 8-impeller positioning nut, 9-current collector positioning pin , 10-wheel cover line, 11-impeller outlet, 12-guide vane inlet, 13-guide vane outlet, 14-impeller inlet, 15-impeller blade leading edge, 16-hub line, 17-impeller blade trailing edge, 18- Guide vane blade leading edge, 19-guide vane blade trailing edge, 20-rotating shaft, 21-impeller blade, 22-guide vane blade.
具体实施方式Detailed ways
以下结合附图对本发明进一步说明：The present invention is further described below in conjunction with accompanying drawing:
请参阅图1和图2，一种混流风机，包括电机5、机匣2、叶轮3、导叶4和集流器1；机匣2一端的内侧同轴固定设置有导叶4，电机5设置在导叶4的轮毂中心；电机5的输出轴固定连接叶轮3的中心；机匣2的另一端内侧设置有集流器1，集流器1与叶轮3同侧；导叶4的轮毂与叶轮3的轮毂直径相同；Please refer to Fig. 1 and Fig. 2, a kind of mixed flow fan, comprises motor 5, case 2, impeller 3, guide vane 4 and current collector 1; Set at the center of the hub of the guide vane 4; the output shaft of the motor 5 is fixedly connected to the center of the impeller 3; the other end of the casing 2 is provided with a current collector 1 on the same side as the impeller 3; the hub of the guide vane 4 Same diameter as the hub of impeller 3;
叶轮3上等间距设置有若干叶片，叶片沿着叶轮3的轮毂线设置；叶片相对于轮毂的边缘为两段凹凸性相反的相切圆弧，靠近集流器1的一段为下凹段，另一段为上凸段，下凹段的圆弧与上凸段的圆弧的半径比为1：2。A number of blades are arranged at equal intervals on the impeller 3, and the blades are arranged along the hub line of the impeller 3; the edges of the blades relative to the hub are two sections of tangent circular arcs with opposite concavity and convexity, and the section close to the collector 1 is a concave section. The other section is the convex section, and the radius ratio of the arc of the concave section to the arc of the convex section is 1:2.
靠近集流器1一端的叶片高度与另一端的叶片高度之比为1.35。The ratio of the vane height near one end of the collector 1 to the vane height at the other end is 1.35.
集流器1内侧壁为圆弧型，集流器型线与机匣2的内壁相切。The inner wall of the current collector 1 is arc-shaped, and the shape line of the current collector is tangent to the inner wall of the casing 2 .
集流器1外径与机匣2内径配合，集流器1外侧边缘设置有集流器定位销9，通过集流器定位销9轴向限位。The outer diameter of the current collector 1 matches the inner diameter of the casing 2, and the outer edge of the current collector 1 is provided with a current collector positioning pin 9, which is axially limited by the current collector positioning pin 9.
叶轮叶片靠近集流器1一侧的边缘线前倾，并延转动方向前弯。The edge line of the impeller blade near the side of the collector 1 leans forward and bends forward along the direction of rotation.
叶轮叶片的另一侧边缘线与电机5的输出轴垂直。The other side edge line of the impeller blade is perpendicular to the output shaft of the motor 5 .
电机5通过电机固定架7固定设置在导叶4的轮毂中心；电机5的输出轴通过叶轮定位螺母与叶轮3的轮毂中心固定连接；叶轮3的轮毂为中空半弧形。The motor 5 is fixedly arranged at the hub center of the guide vane 4 through the motor fixing bracket 7; the output shaft of the motor 5 is fixedly connected with the hub center of the impeller 3 through the impeller positioning nut; the hub of the impeller 3 is hollow and semi-arc.
叶轮叶片数为10，导叶叶片数为13。The number of impeller blades is 10, and the number of guide vane blades is 13.
本发明一种混流换气装置，包括集流器、叶轮、机匣、导叶和电气设备；A mixed-flow ventilation device of the present invention includes a collector, an impeller, a casing, guide vanes and electrical equipment;
本发明的工作过程如下所示：Working process of the present invention is as follows:
该混流风机在进行作业时，电机转轴5带动风机叶轮4一起运动，电机通过支架与导叶固定在一起。When the mixed flow fan is in operation, the motor shaft 5 drives the fan impeller 4 to move together, and the motor is fixed together with the guide vane through the bracket.
开机后叶轮转动，气流经集流器轴向进入风机叶轮，平滑地进入叶轮。在叶轮内气体由于离心作用，气体沿流道斜向上流动。由于流道减缩，气体流速增加，并沿流道转为轴向流动，进入导叶，在导叶内气体的一部份动能转化为压力能。由于混流风机进出口直径差，能有效利用离心力做功，以及后导叶的扩压作用，风机出口气流静压高，克服流动阻力能力强，可以用于复杂流道，长管道等流动损失大的应用场景。After starting up, the impeller rotates, and the air flow enters the fan impeller axially through the collector, and enters the impeller smoothly. Due to the centrifugal effect of the gas in the impeller, the gas flows obliquely upward along the flow channel. Due to the shrinkage of the flow channel, the gas flow velocity increases, and turns to axial flow along the flow channel, and enters the guide vane, where a part of the kinetic energy of the gas is converted into pressure energy. Due to the difference in diameter between the inlet and outlet of the mixed flow fan, the centrifugal force can be effectively used to do work, and the diffuser effect of the rear guide vane, the static pressure of the air flow at the fan outlet is high, and the ability to overcome the flow resistance is strong. It can be used in complex flow channels, long pipelines and other large flow losses. Application scenarios.
具体特征：轮盖线与两端凹凸性相反的相切圆弧组成，如图2所示，前端为下凹段，保证进口处斜率为零，使气流顺畅进入叶轮；前端为上凸段，保证出口处斜率为零，使气流顺畅流出叶轮，进入导叶；两端圆弧相切，半径比为1：2，同时配合圆弧型集流器，集流器型线与机匣线相切，进一步降低进口流动损失，提高效率，增大风量；轮毂线为圆弧线，配合机匣线形状，使子午流道截面沿着流动方向是减缩的。叶轮进出口外径比约为1.35，高的外径比，使气流流经叶轮时可以利用离心力对气体做工，提高出口气流压力。Specific features: the wheel cover line is composed of a tangent arc with opposite concavity and convexity at both ends, as shown in Figure 2, the front end is a downward concave section, which ensures that the slope at the inlet is zero, so that the airflow enters the impeller smoothly; the front end is an upward convex section, Ensure that the slope at the outlet is zero, so that the airflow flows out of the impeller smoothly and enters the guide vane; the arcs at both ends are tangent, and the radius ratio is 1:2. cutting, further reducing the inlet flow loss, improving efficiency, and increasing air volume; the hub line is a circular arc line, which matches the shape of the casing line, so that the cross section of the meridian flow channel is reduced along the flow direction. The outer diameter ratio of the impeller inlet and outlet is about 1.35. The higher outer diameter ratio makes it possible to use the centrifugal force to work on the gas when the air flow passes through the impeller and increase the outlet air pressure.
叶轮前缘线前倾，并延转动方向前弯，抑制二次流，提高效率，降低噪声，The leading edge of the impeller is tilted forward and bent forward along the direction of rotation to suppress secondary flow, improve efficiency, and reduce noise.
叶轮后缘线与转轴垂直，结构紧凑；The trailing edge of the impeller is perpendicular to the shaft, and the structure is compact;
叶轮叶片数为10，导叶叶片数为13。The number of impeller blades is 10, and the number of guide vane blades is 13.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735199.5ACN110529410B (en) | 2019-08-09 | 2019-08-09 | Mixed flow fan |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735199.5ACN110529410B (en) | 2019-08-09 | 2019-08-09 | Mixed flow fan |
| Publication Number | Publication Date |
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| CN110529410Atrue CN110529410A (en) | 2019-12-03 |
| CN110529410B CN110529410B (en) | 2021-12-31 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735199.5AActiveCN110529410B (en) | 2019-08-09 | 2019-08-09 | Mixed flow fan |
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| CN (1) | CN110529410B (en) |
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