Dynamic balance mechanism for impeller of axial flow fan

Abstract

The utility model relates to the technical field of fans, and particularly discloses a dynamic balance mechanism for an impeller of an axial flow fan, which comprises an axial flow main body provided with a motor; the axial flow fan blades are connected with an output shaft of the motor and can rotate under the driving of the motor; the balance assembly is arranged between the motor and the axial flow fan blades and used for reducing deviation generated in the operation process of the axial flow fan blades; and the fixing assembly is arranged between the axial flow fan blades and the axial flow main body. And by arranging the balancing assembly and the fixing assembly, shaking and deviation of the axial flow fan blades in the operation process are reduced, and the operation stability of the axial flow fan blades is improved.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a dynamic balancing mechanism for an axial flow fan impeller. Background Technology

[0002] Axial flow fans are typically used in applications requiring high flow rates but low pressure. These fans are fixed in position and move air, primarily consisting of an impeller and a casing. While their structure is simple, the specifications are very demanding. Before use, the dynamic balancing mechanism of the axial flow fan needs to be tested to ensure its proper operation. In existing axial flow fans, due to the relatively simple impeller structure, prolonged use can place a significant burden on the impeller, potentially causing internal parts to loosen or become damaged, leading to impeller imbalance and affecting suction power. Utility Model Content

[0003] This invention provides a dynamic balancing mechanism for an axial flow fan impeller to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A dynamic balancing mechanism for an axial flow fan impeller includes:

[0006] The axial flow main body is equipped with a motor;

[0007] Axial flow fan blades are connected to the output shaft of the motor and can rotate under the drive of the motor;

[0008] A balancing component is disposed between the motor and the axial fan blades to reduce the offset generated during the operation of the axial fan blades.

[0009] A fixing component is disposed between the axial flow fan blade and the axial flow body.

[0010] In one possible design, the axial flow body includes:

[0011] Axial flow tube;

[0012] An axial flow base plate is installed on the bottom end face of the axial flow cylinder, the motor is installed in the middle, and filter holes are opened circumferentially along the edge.

[0013] In one possible design, the balancing components include:

[0014] The support rod has a sliding block at the top;

[0015] The first fixing plate is inserted into the outer periphery of the output shaft, and the top is connected to the support rod;

[0016] The shock-absorbing spring is connected at the top to the first fixing plate;

[0017] The second fixing plate is inserted into the outer periphery of the output shaft and connected to the bottom of the shock-absorbing spring.

[0018] In one possible design, the balancing component also includes:

[0019] A limit switch is disposed on the outer periphery of the output shaft;

[0020] The connecting rod has a pin at the top, which is inserted into the upper end face of the first fixing plate, and the bottom is rotatably connected to the limiter.

[0021] In one possible design, there are multiple support rods, shock-absorbing springs, and connecting rods.

[0022] In one possible design, the fixing components include:

[0023] The limiting rod is slidably connected to the axial flow fan blade at the top and fixedly connected to the axial flow base plate at the bottom;

[0024] A pulley is rotatably mounted on the top of the limiting rod.

[0025] In one possible design, there are multiple fixed components distributed around the circumference of the motor.

[0026] In one possible design, the axial fan blades include:

[0027] The wheel hub has a groove at the bottom and a track on the lower outer circumference;

[0028] Blades are mounted circumferentially on the hub.

[0029] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0030] This utility model provides a dynamic balancing mechanism for an axial flow fan impeller. By setting a balancing component between the motor output shaft and the axial flow fan blades, it avoids the offset of the axial flow fan blades during rotation. By installing a shock-absorbing spring at the bottom of the first fixed plate, the shock-absorbing spring buffers the axial flow fan blades, further solving the problem that axial flow fan blades are prone to component damage during long-term operation, resulting in strong shaking, causing the fan blades to offset, and causing the balance to fail, thus affecting the purpose of blade suction. By setting a fixing component, the shaking and offset of the axial flow fan blades during operation are further reduced, improving the stability of the axial flow fan blades during operation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2This is a side sectional view of the present invention;

[0033] Figure 3 This is an enlarged schematic diagram of point A in this utility model;

[0034] Figure 4 This is an enlarged schematic diagram of section B of this utility model.

[0035] In the diagram: 1. Axial flow body; 2. Filter hole; 3. Axial flow fan blade; 4. Slide groove; 5. Sliding block; 6. Support rod; 7. First fixing plate; 8. Shock-absorbing spring; 9. Limiting rod; 10. Roller; 11. Limiting block; 12. Slide rail; 13. Motor; 14. Output shaft; 15. Limiter; 16. Connecting rod; 17. Pin. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to embodiments:

[0037] like Figure 1-4 As shown, this utility model provides a dynamic balancing mechanism for an axial flow fan impeller, including an axial flow body 1, an axial flow fan blade 3, a balancing component, and a fixing component. A motor 13 is mounted on the axial flow body 1, and the middle part of the axial flow fan blade 3 is connected to the output shaft 14 of the motor 13, enabling it to rotate under the drive of the motor 13. The balancing component is disposed between the motor 13 and the axial flow fan blade 3. The top of the balancing component is slidably connected to the bottom of the middle part of the axial flow fan blade 3, and the bottom is slidably connected to the output shaft 14 of the motor 13, used to reduce the offset generated during the operation of the axial flow fan blade 3. The fixing component is disposed between the axial flow fan blade 3 and the axial flow body 1. The top of the fixing component is slidably connected to the outer circumference of the hub of the axial flow fan blade 3, and the bottom is fixedly connected to the axial flow body 1. The fixing component further improves the stability of the operation of the axial flow fan blade 3 and reduces the offset generated during the operation of the axial flow fan blade 3.

[0038] When the axial flow fan blade 3 is in operation, the fixing component and the balancing component are used to stabilize the axial flow fan blade 3, thereby avoiding the problem of swaying, shaking and deviation during the rotation of the axial flow fan blade 3, which would lead to a decrease in the suction of the fan blade.

[0039] In one possible design, the axial flow body 1 includes an axial flow cylinder and an axial flow base plate. The axial flow base plate is installed on the bottom end face of the axial flow cylinder, the motor 13 is installed in the middle, and filter holes 2 are formed circumferentially along the edges. This prevents dust and debris from entering the axial flow body 1 and causing damage to the internal equipment.

[0040] In one possible design, the balancing assembly includes: a support rod 6, a first fixing plate 7, a shock-absorbing spring 8, and a second fixing plate connected sequentially from top to bottom. The top of the support rod 6 is provided with a sliding block 5, which is slidably connected to the bottom of the axial flow blade 3. The first fixing plate 7 and the second fixing plate are both inserted into the outer periphery of the output shaft 14 and can rotate relative to the output shaft 14.

[0041] The output shaft 14 of the motor 13 drives the axial flow fan blade 3 to rotate. On the one hand, when the axial flow fan blade 3 moves away from the axis under the vibration of the motor 13, the support rod 6 pulls the axial flow fan blade 3 to move closer to the axis; when the axial flow fan blade 3 moves closer to the axis under the vibration of the motor 13, the support rod 6 holds the axial flow fan blade 3 to move away from the axis, thereby limiting the axial flow fan blade 3 within a fixed trajectory range and preventing the axial flow fan blade 3 from deviating during operation. On the other hand, the shock-absorbing spring 8 is used to buffer the axial flow fan blade 3, thereby preventing the axial flow fan blade 3 from shaking violently during operation, which could damage the internal parts of the equipment.

[0042] In one possible design, the balancing assembly further includes a limiter 15 and a connecting rod 16. The limiter 15 is mounted on the outer periphery of the output shaft 14, and the connecting rod 16 has a pin 17 at the top, which is inserted into the upper end face of the first fixing plate 7 at the top and rotatably connected to the limiter 15 at the bottom.

[0043] In specific implementation, the motor 13 at the bottom of the axial flow body 1 is started, and the transmission shaft 14 of the motor 13 drives the axial flow fan blade 3 to rotate. A limiter 15 is set on the outer periphery of the output shaft 14. The limiter 15 is rotated to connect the connecting rod 16. The pin 17 set at the top of the connecting rod 16 is used to insert the pin 17 into the upper end face of the first fixing plate 7, thereby avoiding the fixing plate 7 from shifting due to vibration during operation, which would cause damage to the axial flow fan blade 3.

[0044] In one possible design, there are multiple support rods 6, damping springs 8, and connecting rods 16. These multiple support rods 6, damping springs 8, and connecting rods 16 are evenly distributed around the outer periphery of the transmission shaft 14. During the rotation of the axial fan blade 3, when the axial fan blade 3 becomes eccentric, the tops of multiple support rods 6 are slidably connected to the axial fan blade 3. One support rod 6, with its top furthest from the axis of the transmission shaft 14, pulls the axial fan blade 3 towards the axis of the transmission shaft 14; another support rod 6, with its top furthest from the axis of the transmission shaft 14, supports the axial fan blade 3, moving it away from the axis of the transmission shaft 14. This improves the stability of the axial fan blade 3's operation and reduces the offset generated during its operation.

[0045] In one possible design, the fixing components include: a limiting rod 9 and a pulley 10, with the top of the limiting rod 9 slidably connected to the axial flow fan blade 3 and the bottom fixedly connected to the axial flow base plate; the pulley 10 is rotatably mounted on the top of the limiting rod 9.

[0046] This invention provides a limiting block 11 on the outer periphery of the hub of the axial flow fan blade 3, with a slide rail 12 on the limiting block 11. A roller 10 is installed in the slide rail 12 and connected to a limiting rod 9. The bottom of the limiting rod 9 is connected to the axial flow body 1. Thus, when the axial flow fan blade 3 is running, the roller 10 limits the axial flow fan blade 3, preventing the axial flow fan blade 3 from shifting during long-term operation, which would lead to balance failure and affect the suction force of the blade.

[0047] In one possible design, there are multiple fixed components distributed around the circumference of the motor 13. One fixed component of the roller 10, away from the axis of the transmission shaft 14, pulls the axial fan blade 3 towards the axis of the transmission shaft 14; another fixed component of the roller 10, near the axis of the transmission shaft 14, supports the axial fan blade 3 as it moves away from the axis of the transmission shaft 14. By being fixedly connected to the axial body 1, the fixed components improve the stability of the axial fan blade 3 during operation and reduce the offset generated during the operation of the axial fan blade 3.

[0048] In one possible design, the axial fan blade 3 includes: a hub and blades located on the outer periphery of the hub. The hub is a cylindrical structure with a closed top. The bottom of the hub is provided with a groove 4, and the lower outer periphery is provided with a slide rail 12. That is, the lower surface of the closed top surface of the hub is provided with an annular groove 4, and the sliding block 5 is embedded in the groove 4 and can slide along the groove 4. The lower outer periphery of the cylindrical structure of the hub is provided with an annular limiting block 11, and the outer periphery of the limiting block 11 is provided with an annular slide rail 12. The roller 10 is embedded in the annular slide rail 12 and can slide along the slide rail 3.

[0049] The working principle of the axial flow fan impeller dynamic balancing mechanism will be explained in detail below.

[0050] like Figure 1-4As shown, by starting the motor 13 installed on the axial flow body 1, the output shaft 14 of the motor 13 rotates, driving the top axial flow fan blade 3 to rotate. A limiter 15 is set on the outer periphery of the output shaft 14, and a connecting rod 16 is rotatably connected to the limiter 15. One end of the connecting rod 16 is provided with a pin 17, which is inserted into the first fixing plate 7. This prevents the first fixing plate 7 from shifting due to vibration during the operation of the axial flow body 1, thus avoiding damage to the axial flow fan blade 3. A sliding block 5 is embedded in the groove 4 on the lower end face of the hub of the axial flow fan blade 3. The sliding block 5 is connected to the support rod 6, and the end of the rod fixes the first fixing plate 7, thereby preventing the axial flow fan blade 3 from shifting. During the process, a deviation occurs. By setting a shock-absorbing spring 8 on one side of the first fixed plate 7, the shock-absorbing spring 8 is used to buffer the axial flow fan blade 3, thereby preventing the blade from shaking violently during operation and causing damage to the internal parts of the equipment. By setting a limiting block 11 on the outer periphery of the hub of the axial flow fan blade 3, and opening a slide 12 on the outer periphery of the limiting block 11, by embedding a roller 10 in the slide 12, the roller 10 is connected to the limiting rod 9, and the end of the limiting rod 9 is connected to the axial flow body 1, so that when the axial flow fan blade 3 is running, the roller 10 is used to limit the blade, preventing the axial flow fan blade 3 from deviating during long-term operation, which would lead to balance failure and affect the purpose of blade suction.

[0051] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A dynamic balancing mechanism for an axial flow fan impeller, characterized in that: include: The axial flow main body is equipped with a motor; Axial flow fan blades are connected to the output shaft of the motor and can rotate under the drive of the motor; A balancing component is disposed between the motor and the axial fan blades to reduce the offset generated during the operation of the axial fan blades. A fixing component is disposed between the axial flow fan blade and the axial flow body.

2. The axial flow fan impeller dynamic balancing mechanism according to claim 1, characterized in that: The axial flow body includes: Axial flow tube; An axial flow base plate is installed on the bottom end face of the axial flow cylinder, the motor is installed in the middle, and filter holes are opened circumferentially along the edge.

3. The axial flow fan impeller dynamic balancing mechanism according to claim 1, characterized in that: The balancing component includes: The support rod has a sliding block at the top; The first fixing plate is inserted into the outer periphery of the output shaft, and the top is connected to the support rod; The shock-absorbing spring is connected at the top to the first fixing plate; The second fixing plate is inserted into the outer periphery of the output shaft and connected to the bottom of the shock-absorbing spring.

4. The axial flow fan impeller dynamic balancing mechanism according to claim 3, characterized in that: The balancing component also includes: A limit switch is disposed on the outer periphery of the output shaft; The connecting rod has a pin at the top, which is inserted into the upper end face of the first fixing plate, and the bottom is rotatably connected to the limiter.

5. A dynamic balancing mechanism for an axial flow fan impeller according to any one of claims 3-4, characterized in that: The number of support rods, shock-absorbing springs, and connecting rods are all multiple.

6. The axial flow fan impeller dynamic balancing mechanism according to claim 2, characterized in that: The fixing component includes: The limiting rod is slidably connected to the axial flow fan blade at the top and fixedly connected to the axial flow base plate at the bottom; A pulley is rotatably mounted on the top of the limiting rod.

7. A dynamic balancing mechanism for an axial flow fan impeller according to any one of claims 1-3, characterized in that: The number of fixed components is multiple, and they are distributed around the circumference of the motor.

8. A dynamic balancing mechanism for an axial flow fan impeller according to any one of claims 1-3, characterized in that: The axial flow fan blades include: The wheel hub has a groove at the bottom and a track on the lower outer circumference; Blades are mounted circumferentially on the hub.

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