Axial flow fan blade balance calibration device

Abstract

The utility model provides an axial flow fan blade balance calibration device, and relates to the technical field of blade balance calibration, the axial flow fan blade balance calibration device comprises a fixing plate, and an axial flow fan blade balance calibration assembly is arranged above the fixing plate; the supporting frame is fixedly installed at the top of the fixing plate, through the arranged axial flow fan blade balance calibration assembly, according to the lowest point of a blade shaft or a blade, the electric telescopic rod can be controlled to drive the installation plate to move at the moment, and the stress plate is located at the lowest point of the blade shaft and the blade; the first motor is controlled to start and drive the first driving shaft and the blade shafts and the blades above to rotate at a high speed, in the high-speed rotating process of the blade shafts and the blades, if the blade shafts and the blades collide with the stress plate, the pressure sensor can be stressed, and the blade shafts and the blades are driven to rotate according to the pressure detected by the pressure sensor. Balance correction can be carried out by adding or removing the counter weight at the appropriate position of the blade, so that the dynamic balance state is achieved, and vibration and noise generated when the fan runs are reduced.

Description

Technical Field

[0001] This utility model relates to the field of blade balance calibration technology, and in particular to a blade balance calibration device for axial flow fans. Background Technology

[0002] In industrial plants, underground parking lots, tunnels and other places, it can exhaust indoor polluted air and introduce fresh air, ensure air circulation, improve air quality, and provide a good air environment for personnel and equipment. During production or long-term use, the impeller of the centrifugal fan may wear out and become unbalanced, which can easily cause greater noise or vibration during use and affect the performance. Therefore, it is necessary to test and calibrate the balance of the impeller blades.

[0003] The announcement number CN216477970U discloses an axial flow fan blade balancing calibration device, including a base plate, a support plate and a clamping assembly fixedly connected to the top of the base plate, a drive mechanism fixedly connected to the left side of the support plate and extending through to the right side of the support plate and movably connected to the right side of the support plate, the drive mechanism including a bearing plate fixedly connected to the left side of the support plate, and a drive motor fixedly connected to the top of the bearing plate;

[0004] In use, existing devices, after fixing the impeller, drive it to rotate via a motor. However, the hot air clamping component makes it difficult for the device to simultaneously balance and calibrate the impeller and blades, and results in a small measurement range. Therefore, we propose an axial flow fan blade balancing calibration device. Utility Model Content

[0005] In view of this, this application provides an axial flow fan blade balancing calibration device, which solves the above technical problems to a certain extent.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An axial flow fan blade balancing calibration device includes a fixing plate, and an axial flow fan blade balancing calibration component is disposed above the fixing plate;

[0008] The axial flow fan blade balance calibration assembly includes a support frame, a sliding box, an electric telescopic rod, a mounting plate, and a pressure sensor. The support frame is fixedly installed on the top of the fixed plate, the sliding box is slidably installed on the top of the support frame, the electric telescopic rod is fixedly installed on the left and right sides inside the sliding box, the mounting plate is fixedly installed on the output end of the electric telescopic rod, and the pressure sensor is fixedly installed on the inner side of the mounting plate.

[0009] As a further improvement to the above solution, a first motor is fixedly installed on the top of the fixed plate, a first drive shaft is fixedly installed on the output end of the first motor, a support plate is fixedly installed on the top of the first drive shaft, a threaded rod is fixedly installed on the top of the support plate, a locking nut is installed on the outer thread of the threaded rod, and a blade calibration adjustment component is provided above the axial flow fan blade balance calibration component.

[0010] As a further improvement to the above solution, the axial flow fan blade balance calibration assembly also includes a spring, a damper, and a force plate. The spring is fixedly installed at the top four corners of the mounting plate, the damper is fixedly installed on the top left and right sides of the mounting plate, and the force plate is fixedly installed on top of the spring and the damper.

[0011] By adopting the above technical solution, based on the lowest point of the blade shaft or blade, the electric telescopic rod can be controlled to move the mounting plate, so that the force plate is located at the lowest point of the blade shaft and blade. The first motor is then started and drives the first drive shaft and the blade shaft and blade above to rotate at high speed. If the blade shaft and blade collide with the force plate during high-speed rotation, the pressure sensor can apply force. Based on the pressure detected by the pressure sensor, the balance can be corrected by adding or removing counterweights at appropriate positions on the blades to achieve dynamic balance and reduce vibration and noise during fan operation.

[0012] As a further improvement to the above solution, the blade calibration and adjustment assembly includes a second motor, a second drive shaft, a transmission gear, a limiting frame, and a tooth groove. The second motor is fixedly installed on one side of the sliding box, the second drive shaft is fixedly installed on the output end of the second motor, the transmission gear is fixedly installed on the left and right sides of the outer side of the second drive shaft, the limiting frame is fixedly installed on the left and right sides of the bottom of the sliding box, and the tooth groove is opened on the left and right sides of the top of the support frame. The transmission gear meshes with the adjacent tooth groove.

[0013] By adopting the above technical solution, the staff can adjust the position of the force plate by balancing the blade shaft or blades as needed. At this time, the second motor can be controlled to drive the second drive shaft and transmission gear to rotate. After the transmission gear rotates, it can drive the sliding box to move its position through the tooth groove. After the sliding box moves, the position of the force plate can be determined.

[0014] As a further improvement to the above solution, the top of the support frame is provided with a scale groove, and the left and right sides of the top of the support frame are provided with limit grooves, and the limit frame is slidably installed inside the limit grooves.

[0015] As a further improvement to the above solution, a through groove is provided at the bottom of the sliding box, and the transmission gear is rotatably disposed inside the through groove.

[0016] As a further improvement to the above solution, a sliding groove is provided on the top of the sliding box, and the minimum outer diameter of the electric telescopic rod is the same as the inner diameter of the sliding groove.

[0017] As a further improvement to the above solution, the outer side of the force-bearing plate is provided with an arc-shaped chamfer, and the top of the force-bearing plate is provided with a rubber pad.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) The present invention provides an axial flow fan blade balance calibration device. By setting an axial flow fan blade balance calibration component, the electric telescopic rod can be controlled to move the mounting plate according to the lowest point of the blade shaft or blade, so that the force plate is located at the lowest point of the blade shaft and blade. The first motor is controlled to start and drive the first drive shaft and the blade shaft and blade above to rotate at high speed. If the blade shaft and blade collide with the force plate during the high-speed rotation, the pressure sensor can be subjected to force. According to the pressure detected by the pressure sensor, the balance can be corrected by adding or removing counterweights at appropriate positions on the blade to achieve dynamic balance and reduce the vibration and noise of the fan during operation.

[0020] (2) The present invention provides an axial flow fan blade balance calibration device. Through the blade calibration adjustment component, the operator can adjust the position of the force plate by calibrating the balance of the blade shaft or blade as needed. At this time, the second motor can be controlled to drive the second drive shaft and transmission gear to rotate. After the transmission gear rotates, it can drive the sliding box to move through the tooth groove. After the sliding box moves, the position of the force plate can be determined.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of an axial flow fan blade balancing calibration device proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of a three-dimensional view of a partial structure of an axial flow fan blade balancing calibration device according to an embodiment of this application;

[0024] Figure 3 A schematic diagram showing a three-dimensional cross-sectional view of an axial flow fan blade balancing calibration device according to an embodiment of this application is provided.

[0025] Figure 4A schematic diagram of the exploded portion structure of an axial flow fan blade balancing calibration device provided according to an embodiment of this application is shown.

[0026] Figure label:

[0027] 1. Axial flow fan blade balancing calibration assembly; 2. Blade calibration and adjustment assembly; 3. Fixing plate; 4. First motor; 5. First drive shaft; 6. Support plate; 7. Threaded rod; 8. Locking nut;

[0028] 11. Support frame; 12. Sliding box; 13. Electric telescopic rod; 14. Mounting plate; 15. Pressure sensor; 16. Spring; 17. Damper; 18. Force plate;

[0029] 21. Second motor; 22. Second drive shaft; 23. Transmission gear; 24. Limiting frame; 25. Gear groove; 26. Limiting groove; 27. Scale groove. Detailed Implementation

[0030] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings;

[0031] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] refer to Figure 1-4 An axial flow fan blade balance calibration device includes a fixed plate 3, and an axial flow fan blade balance calibration component 1 is disposed above the fixed plate 3.

[0033] The axial flow fan blade balancing calibration assembly 1 includes a support frame 11, a sliding box 12, an electric telescopic rod 13, a mounting plate 14, and a pressure sensor 15. The support frame 11 is fixedly mounted on the top of the mounting plate 3. The sliding box 12 is slidably mounted on the top of the support frame 11. The electric telescopic rod 13 is fixedly mounted on the left and right sides inside the sliding box 12. The mounting plate 14 is fixedly mounted on the output end of the electric telescopic rod 13. The pressure sensor 15 is fixedly mounted on the inner side of the mounting plate 14. The function of the pressure sensor 15 is to detect the pressure generated by the rotating impeller and blades. Its effect is that by detecting the pressure, the range of impeller and blade misalignment can be determined, thereby providing a basis for operators to accurately add counterweights above the blades, helping to achieve impeller and blade balance correction, and ensuring stable operation of the equipment. The pressure sensor 15 is prior art, so it is not described in detail in this utility model.

[0034] In a further preferred embodiment of this utility model, a first motor 4 is fixedly installed on the top of the fixed plate 3, a first drive shaft 5 is fixedly installed on the output end of the first motor 4, a support plate 6 is fixedly installed on the top of the first drive shaft 5, a threaded rod 7 is fixedly installed on the top of the support plate 6, a locking nut 8 is installed on the outer thread of the threaded rod 7, and a blade calibration adjustment component 2 is provided above the axial flow fan blade balance calibration component 1.

[0035] In a further preferred embodiment of this utility model, the axial flow fan blade balance calibration assembly 1 further includes a spring 16, a damper 17, and a force plate 18. The spring 16 is fixedly installed at the top four corners of the mounting plate 14, the damper 17 is fixedly installed on the top left and right sides of the mounting plate 14, and the force plate 18 is fixedly installed on the top of the spring 16 and the damper 17. The spring 16 and the damper 17 facilitate the reset of the force plate 18, and the damper 17 can absorb and cancel the force of vibration, so that the force plate 18 is less likely to experience aggravated shaking.

[0036] In a further preferred embodiment of this utility model, the blade calibration and adjustment assembly 2 includes a second motor 21, a second drive shaft 22, a transmission gear 23, a limiting frame 24, and a toothed groove 25. The second motor 21 is fixedly installed on one side of the sliding box 12, the second drive shaft 22 is fixedly installed on the output end of the second motor 21, the transmission gear 23 is fixedly installed on the left and right sides of the outer side of the second drive shaft 22, the limiting frame 24 is fixedly installed on the left and right sides of the bottom of the sliding box 12, and the toothed groove 25 is opened on the left and right sides of the top of the support frame 11. The transmission gear 23 and the adjacent toothed groove 25 mesh with each other.

[0037] In a further preferred embodiment of the present invention, a scale groove 27 is provided on the top of the support frame 11, and limit grooves 26 are provided on the left and right sides of the top of the support frame 11. The limit frame 24 is slidably installed inside the limit groove 26. The limit groove facilitates the limitation of the limit frame 24, so that the sliding box 12 can only slide after being subjected to force, which can achieve a more stable movement of the sliding box 12.

[0038] In a further preferred embodiment of the present invention, a through groove is provided at the bottom of the sliding box 12, and the transmission gear 23 is rotatably disposed inside the through groove.

[0039] In a further preferred embodiment of this utility model, a sliding groove is provided on the top of the sliding box 12, and the minimum outer diameter of the electric telescopic rod 13 is the same as the inner diameter of the sliding groove; the electric telescopic rod 13 can move through the sliding groove, which facilitates the electric telescopic rod 13 to adjust the position of the mounting plate 14 and the force plate 18 above.

[0040] In a further preferred embodiment of the present invention, an arc-shaped chamfer is provided on the outer side of the force plate 18, and a rubber pad is provided on the top of the force plate 18; the arc-shaped chamfer and the rubber pad facilitate the protection of the impeller and blades, preventing them from being damaged after colliding with the force plate 18.

[0041] The specific operation involves installing the impeller and blades above the axial flow fan onto the threaded rod 7 via a threaded connection, and locking the impeller with a locking nut 8. Operators can adjust the position of the force plate 18 by balancing the impeller or blades as needed. At this time, the second motor 21 can be controlled to drive the second drive shaft 22 and the transmission gear 23 to rotate. After rotation, the transmission gear 23, through the tooth groove 25, drives the sliding box 12 to move. After the sliding box 12 moves, the position of the force plate 18 is determined based on the lowest point of the impeller or blade. The electric telescopic rod 13 can be controlled to move the mounting plate 14, so that the force plate 18 is located at the lowest point of the blade shaft and blades. The first motor 4 is controlled to start and drive the first drive shaft 5 and the blade shaft and blades above to rotate at high speed. If the blade shaft and blades collide with the force plate 18 during high-speed rotation, the pressure sensor 15 can be subjected to force. According to the pressure detected by the pressure sensor 15, the balance can be corrected by adding or removing counterweights at appropriate positions on the blades to achieve dynamic balance and reduce vibration and noise during operation of the fan.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for balancing and calibrating axial flow fan blades, characterized in that, include: A fixed plate (3) is provided above the fixed plate (3) and an axial flow fan blade balance calibration assembly (1) is provided above the fixed plate (3); The axial flow fan blade balance calibration assembly (1) includes a support frame (11), a sliding box (12), an electric telescopic rod (13), a mounting plate (14), and a pressure sensor (15). The support frame (11) is fixedly installed on the top of the fixed plate (3). The sliding box (12) is slidably installed on the top of the support frame (11). The electric telescopic rod (13) is fixedly installed on the left and right sides inside the sliding box (12). The mounting plate (14) is fixedly installed on the output end of the electric telescopic rod (13). The pressure sensor (15) is fixedly installed on the inside of the mounting plate (14).

2. The axial flow fan blade balancing calibration device according to claim 1, characterized in that, A first motor (4) is fixedly installed on the top of the fixed plate (3), a first drive shaft (5) is fixedly installed on the output end of the first motor (4), a support plate (6) is fixedly installed on the top of the first drive shaft (5), a threaded rod (7) is fixedly installed on the top of the support plate (6), a locking nut (8) is installed on the outer thread of the threaded rod (7), and a blade calibration adjustment assembly (2) is provided above the axial flow fan blade balance calibration assembly (1).

3. The axial flow fan blade balancing calibration device according to claim 1, characterized in that, The axial flow fan blade balance calibration assembly (1) also includes a spring (16), a damper (17) and a force plate (18). The spring (16) is fixedly installed at the top four corners of the mounting plate (14). The damper (17) is fixedly installed on the top left and right sides of the mounting plate (14). The force plate (18) is fixedly installed on the top of the spring (16) and the damper (17).

4. The axial flow fan blade balancing calibration device according to claim 2, characterized in that, The blade calibration and adjustment assembly (2) includes a second motor (21), a second drive shaft (22), a transmission gear (23), a limiting frame (24), and a toothed groove (25). The second motor (21) is fixedly installed on one side of the sliding box (12). The second drive shaft (22) is fixedly installed at the output end of the second motor (21). The transmission gear (23) is fixedly installed on the left and right sides of the outer side of the second drive shaft (22). The limiting frame (24) is fixedly installed on the left and right sides of the bottom of the sliding box (12). The toothed groove (25) is opened on the left and right sides of the top of the support frame (11). The transmission gear (23) meshes with the adjacent toothed groove (25).

5. The axial flow fan blade balancing calibration device according to claim 4, characterized in that, The top of the support frame (11) is provided with a scale groove (27), and the left and right sides of the top of the support frame (11) are provided with limit grooves (26). The limit frame (24) is slidably installed on the inner side of the limit groove (26).

6. The axial flow fan blade balancing calibration device according to claim 4, characterized in that, The bottom of the sliding box (12) is provided with a through groove, and the transmission gear (23) is rotatably disposed inside the through groove.

7. The axial flow fan blade balancing calibration device according to claim 1, characterized in that, The top of the sliding box (12) is provided with a sliding groove, and the minimum outer diameter of the electric telescopic rod (13) is the same as the inner diameter of the sliding groove.

8. The axial flow fan blade balancing calibration device according to claim 3, characterized in that, The outer side of the force-bearing plate (18) is provided with an arc-shaped chamfer, and the top of the force-bearing plate (18) is provided with a rubber pad.

Images