A fan off-line detection platform

Abstract

The application discloses a fan off-line detection platform, which comprises a bottom plate, a plurality of vertical columns arranged in a circumferential equiangular manner are arranged on the bottom plate, the upper ends of the plurality of vertical columns are commonly provided with a clamping mechanism, the clamping mechanism comprises a ring-shaped spring, a plurality of clamping blocks corresponding to the vertical columns are uniformly arranged on the ring-shaped spring in a circumferential direction, the inner wall of the clamping block is matched with the outer wall profile of the fan to be detected, the outer wall of each clamping block is connected with the upper end of the corresponding vertical column through a first return spring, the bottom of one of the clamping blocks is provided with a vibration sensor, the vibration sensor is electrically connected with an external vibration detector, a lower support is further arranged on the bottom plate, an air outlet joint is arranged on the upper part of the lower support, one end of the air outlet joint is used for being communicated with the air outlet of the fan, and the other end of the air outlet joint is provided with a corrugated pipe. The test platform adopts a double-layer elastic support mode, and the influence of tooling and arrangement mode on fan vibration measurement is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the fan vibration detection technical field, especially to a fan off-line detection platform. BACKGROUND

[0002] For miniature fan, the application range is very wide, and the arrangement mode is also more diverse. After the miniature fan is off-line, the vibration of the fan needs to be detected to the greatest extent. Generally, the test table fixes the fan on the specified tooling, detects the vibration of the tooling, and usually adopts the rigid connection mode. Because the weight of the miniature fan itself is relatively light, the tooling often becomes a larger additional mass, which can inhibit the vibration of the motor and cannot detect the actual generated vibration. In addition, for the fixing mode of the tooling, the clamping force and the contact relationship between the fan and the clamping tooling are another important factor affecting the vibration measurement. The test data of the test table at the present stage cannot intuitively reflect the vibration of the fan. SUMMARY

[0003] The purpose of the present application is to provide a fan off-line detection platform to solve the technical problems mentioned in the background.

[0004] To solve the above technical problems, the present application adopts the following technical scheme:

[0005] The fan off-line detection platform comprises a bottom plate, a plurality of vertical columns arranged at equal angles in a circumferential manner are arranged on the bottom plate, a clamping mechanism for clamping a fan to be detected is arranged at the upper ends of the plurality of vertical columns in common, the clamping mechanism comprises a ring-shaped spring, a plurality of clamping blocks corresponding to the vertical columns are uniformly arranged on the ring-shaped spring in a circumferential direction, the inner walls of the clamping blocks are matched with the outer wall profiles of the fans to be detected, and the outer walls of the clamping blocks are respectively connected to the upper ends of the corresponding vertical columns through first return springs. A vibration sensor is arranged at the bottom of one of the clamping blocks, and the vibration sensor is electrically connected to an external vibration detector. A lower support is further arranged on the bottom plate, an air outlet connector is arranged on the upper part of the lower support, one end of the air outlet connector is used for communicating with the air outlet of the fan, and the other end of the air outlet connector is provided with a corrugated pipe.

[0006] Further, the lower ends of the vertical columns are hingedly connected to mounting seats fixedly arranged on the bottom plate.

[0007] Further, a first connecting ring is arranged on the inner side of each vertical column, a second connecting ring is arranged on the outer side of each clamping block, one end of the first return spring is connected to the corresponding first connecting ring, and the other end of the first return spring is connected to the corresponding second connecting ring.

[0008] Further, the bottom plate is vertically provided with a driving cylinder in the middle of the plurality of clamping blocks, the telescopic end of the driving cylinder is fixedly connected with the bottom of the top table, the top table is uniformly provided with a plurality of third connecting rings which are the same in number as the number of the columns in the circumferential direction, and each third connecting ring is connected with a fourth connecting ring provided on the outer side of the upper end of the corresponding column through a first pull rope.

[0009] Further, the bottom plate is rotatably provided with a first pulley on the outer side of each column, a through groove is formed in the middle of each column, and each first pull rope is connected with the fourth connecting ring on the corresponding column after penetrating through the through groove and the first pulley.

[0010] Further, a vertical plate is fixedly arranged on the bottom plate, and the vertical plate is connected with the lower support through a plurality of second return springs.

[0011] Further, the upper end of the lower support is fixedly connected with the lower end of a wave-shaped elastic steel plate, and the air outlet joint is arranged on the upper end of the wave-shaped elastic steel plate.

[0012] Further, a fifth connecting ring is arranged on the top table, and the fifth connecting ring is connected with the lower support through a second pull rope.

[0013] Further, a second pulley is rotatably arranged on the outer side of the vertical plate and the lower support of the bottom plate, a through hole is formed in the middle of the vertical plate, and the second pull rope is connected with the lower support after sequentially penetrating through two second pulleys and the through hole.

[0014] Compared with the prior art, the beneficial technical effects of the present application are:

[0015] The present test bench adopts a double-layer elastic support mode, greatly reduces the influence of tooling and arrangement mode on fan vibration measurement, adopts annular spring clamping, and the light tooling is arranged in a symmetrical manner. The annular spring can automatically return, the clamping force is uniform and symmetrical and can be offset; the lower support on which the air outlet joint is arranged adopts a wave-shaped elastic steel plate, which is light and can store energy at the bending part, and can be arranged in the desired direction according to actual needs, so that more reasonable lateral and vertical stiffness can be obtained, and better vibration isolation effect can be obtained, and the air outlet joint adopts a corrugated pipe to additionally isolate the influence of vibration at the extension end of the air outlet joint. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the description of the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of the top view structure of the present application;

[0019] Figure 3 This is a schematic diagram of the connection of multiple clamping blocks according to the present invention;

[0020] Figure 4 This is a schematic diagram of the top platform structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the air outlet connector connection of the present invention;

[0022] Figure 6 This is a schematic diagram of the base plate structure of the present invention;

[0023] Figure 7 This is a schematic diagram showing the movement of each component when the drive cylinder extends;

[0024] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Column; 3. Mounting base; 4. First return spring; 5. Clamping block; 6. First connecting ring; 7. Second connecting ring; 8. Fan; 9. Ring spring; 10. Vibration sensor; 11. Drive cylinder; 12. Top platform; 13. Third connecting ring; 14. First pull rope; 15. Fourth connecting ring; 16. First pulley; 17. Through groove; 18. Lower support; 19. Vertical plate; 20. Second return spring; 21. Air outlet connector; 22. Corrugated elastic steel plate; 23. Corrugated pipe; 24. Fifth connecting ring; 25. Second pull rope; 26. Second pulley; 27. Through hole. Detailed Implementation

[0025] like Figures 1-6 As shown, a wind turbine offline testing platform includes a base plate 1, on which a plurality of columns 2 are installed in a circular, equidistant arrangement. In this embodiment, the number of columns 2 is four, and the lower end of each column 2 is hinged to a mounting base 3 fixedly installed on the base plate 1.

[0026] The upper ends of multiple columns 2 are collectively provided with a clamping mechanism for holding the fan under test. The clamping mechanism includes a ring spring 9, on which multiple clamping blocks 5, corresponding one-to-one with each column 2, are uniformly sleeved along the circumference. The inner wall of each clamping block 5 is adapted to the outer contour of the fan 8 under test, and the outer wall of each clamping block 5 is connected to the upper end of the corresponding column 2 via a first return spring 4. Specifically, a first connecting ring 6 is provided on the inner side of the upper end of each column 2, and a second connecting ring 7 is provided on the outer side of each clamping block 5. One end of the first return spring 4 is connected to the corresponding first connecting ring 6, and the other end of the first return spring 4 is connected to the corresponding second connecting ring 7. A vibration sensor 10 is installed at the bottom of one of the clamping blocks 5, and the vibration sensor 10 is electrically connected to an external vibration detector.

[0027] The bottom plate 1 is provided with a vertical driving cylinder 11 below the middle of the plurality of clamping blocks 5, and the telescopic end of the driving cylinder 11 is fixedly connected with the bottom of a top table 12.

[0028] In the embodiment, the bottom plate 1 is rotatably installed with a first pulley 16 at the outer part of each of the columns 2, and the middle part of each of the columns 2 is provided with a through slot 17, and each of the first pull ropes 14 is connected with the fourth connecting ring 15 on the corresponding column 2 after penetrating through the through slot 17 and passing through the first pulley 16.

[0029] The bottom plate 1 is further provided with a lower support 18, and specifically, the bottom plate 1 is fixedly installed with a vertical plate 19 perpendicular thereto, and the vertical plate 19 is connected with the lower support 18 through a plurality of second return springs 20.

[0030] The upper part of the lower support 11 is installed with an air outlet joint 21, and specifically, the upper part of the lower support 18 is fixedly connected with the lower end of a wave-shaped elastic steel plate 22, the air outlet joint 21 is arranged at the upper end of the wave-shaped elastic steel plate 22, and one end of the air outlet joint 21 is used for being in communication with the air outlet of the fan 8, and the other end is installed with a corrugated pipe 23.

[0031] The top table 12 is provided with a fifth connecting ring 24, and the fifth connecting ring 24 is connected with the lower support 18 through a second pull rope 25.

[0032] In the embodiment, the bottom plate 1 is rotatably installed with a second pulley 26 at the outer part of the vertical plate 19 and the lower support 18, the middle part of the vertical plate 19 is provided with a through hole 27, and the second pull rope 25 is connected with the lower support 18 after sequentially passing through two second pulleys 26 and penetrating through the through hole 27.

[0033] In the working process of the application, the driving cylinder is elongated, each first pull rope and second pull rope is pulled by the top table, each component is moved in the direction as shown in the drawings, so that the plurality of clamping blocks 5 are opened outward, and the air outlet joint 21 is moved outward, so that the fan 8 is arranged between the plurality of clamping blocks 5. Figure 7 After the driving cylinder is reset, the plurality of clamping blocks are moved towards each other under the restoring elastic force of the plurality of first return springs and second return springs, so as to stably clamp the fan, and the air outlet joint is in communication with the air outlet of the fan.

[0034] The test bench adopts a double-layer elastic support mode, greatly reduces the influence of tooling and arrangement mode on fan vibration measurement, adopts annular spring clamping, light tooling is arranged in a symmetrical mode, the annular spring can automatically return, the clamping force is uniform and symmetrical and is mutually offset; the lower support for installing the air outlet joint adopts a wave elastic steel plate, is light, the bending part can store energy, and can be arranged according to actual needs, so that more reasonable lateral and vertical stiffness can be obtained, and better vibration isolation effect can be obtained, and the air outlet joint outlet adopts a corrugated pipe, and the influence of vibration of the extension end of the air outlet pipe is additionally isolated.

[0035] The application can greatly reduce the influence of tooling arrangement mode on fan vibration measurement; meanwhile, a pulley mechanism is adopted, so that the arrangement of the micro fan on the detection table can be completed by one-step operation, and semi-automatic detection is realized.

[0036] The above-described embodiments are only used to describe the preferred modes of the application, and do not limit the scope of the application, and various modifications and improvements to the technical solutions of the application made by those skilled in the art without departing from the design spirit of the application shall fall within the protection scope of the claims of the application.

Claims

1. A wind turbine offline testing platform, characterized in that: The device includes a base plate on which multiple columns are arranged equiangularly in a circular pattern. A clamping mechanism for holding a fan under test is provided at the upper end of each column. The clamping mechanism includes a ring spring with multiple clamping blocks evenly spaced along its circumference, each corresponding to one of the columns. The inner wall of each clamping block is adapted to the outer contour of the fan under test. The outer wall of each clamping block is connected to the upper end of the corresponding column via a first return spring. A vibration sensor is provided at the bottom of one of the clamping blocks and is electrically connected to an external vibration detector. A lower support is also provided on the base plate, with an air outlet connector at its upper part. One end of the air outlet connector is connected to the air outlet of the fan, and the other end is equipped with a corrugated pipe. The lower end of each column is hinged to a mounting base fixed on the base plate; a first connecting ring is provided on the inner side of each column, and a second connecting ring is provided on the outer side of each clamping block; one end of the first return spring is connected to the corresponding first connecting ring, and the other end of the first return spring is connected to the corresponding second connecting ring. The base plate has a driving cylinder vertically arranged below the middle of the multiple clamping blocks. The telescopic end of the driving cylinder is fixedly connected to the bottom of the top platform. The top platform is evenly arranged with multiple third connecting rings in the same number as the columns along the circumference. Each of the third connecting rings is connected to a fourth connecting ring located on the outer side of the upper end of the corresponding column by a first pull rope. The base plate is rotatably equipped with first pulleys on the outside of each of the columns. Each column has a through groove in the middle. Each first pull rope passes through the through groove, passes through the first pulley, and is connected to the fourth connecting ring on the corresponding column.

2. The wind turbine offline testing platform according to claim 1, characterized in that: A vertical plate is fixedly installed on the base plate, and the vertical plate is connected to the lower support through multiple second return springs.

3. The wind turbine offline testing platform according to claim 2, characterized in that: The upper part of the lower support is fixedly connected to the lower end of a corrugated elastic steel plate, and the air outlet connector is located at the upper end of the corrugated elastic steel plate.

4. The wind turbine offline testing platform according to claim 3, characterized in that: A fifth connecting ring is provided on the top platform, and the fifth connecting ring is connected to the lower support through a second pull rope.

5. The wind turbine offline testing platform according to claim 4, characterized in that: The base plate is rotatably equipped with second pulleys on the outside of the upright plate and the lower support. A through hole is opened in the middle of the upright plate. The second pull rope passes through two second pulleys in sequence and through the through hole before connecting to the lower support.

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