A wind power brake spring force value testing device

Abstract

The utility model discloses a kind of wind power brake spring force value test equipment, it is related to brake detection technical field. Including workbench, conveying mechanism loading brake tooling moves back and forth between installation station and test station;The upper portion of workbench and located test station is provided with lifting mechanism and pressing mechanism, and pressing mechanism includes multiple pressing units, and the pressing end of any pressing unit includes pressure sensor;Pressing end is the end for the measured brake. Still including displacement sensing module, the position of displacement sensing module in height direction can be adjusted by adjusting mechanism;When equipment is in test state, the top of displacement sensing module is inserted and higher than the upper surface of measured brake, when conveying mechanism moves, displacement sensing module is located below workbench. Effectively solve the problem that many models are adapted difficultly due to single pressing mechanism of existing equipment, thereby greatly simplify test procedure, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of brake testing technology, and in particular to a test device for the spring force value of wind turbine brakes. Background Technology

[0002] Wind turbine brakes are crucial safety actuators in wind turbine generator sets, primarily used to provide reliable braking torque when the unit needs to stop or perform emergency braking, ensuring the wind turbine safely stops rotating. Their core function relies on internally pre-compressed, high-strength springs. These springs are compressed and store energy when the brake is released, releasing this energy when a braking command is issued to drive the friction pads and generate braking force. Therefore, the accuracy and stability of the spring force directly determine the brake's performance and reliability.

[0003] To ensure the performance and safe operation of wind turbine brakes before they leave the factory, accurate testing of the force value of their internal springs is an essential step. The basic principle of spring force testing equipment is to simulate the actual working state of the brake: the brake under test is fixed to a fixture, and a vertically downward force is applied to the upper surface of the brake through a specific pressing mechanism. This force is transmitted to the spring through the internal structure of the brake, causing it to be compressed. At the same time, the applied pressure value F and the corresponding compression displacement S of the spring are accurately measured, and finally, a force-displacement curve (FS curve) is plotted to evaluate the performance parameters of the spring.

[0004] However, existing wind turbine brake spring force testing equipment has significant shortcomings in adapting to product diversity. The wind power industry produces numerous brake models with significant structural differences, particularly in the position and shape of their top force-bearing surfaces. Existing equipment typically employs a single-structure pressure head with a fixed position and shape, making it difficult to accommodate the testing requirements of different brake models. When testing different brake models, it often necessitates stopping the machine, manually replacing the entire pressure head, or even adjusting the pressure mechanism structure. This cumbersome and time-consuming operation severely impacts testing efficiency and fails to meet the requirements of mass production and rapid switching between multiple models.

[0005] Therefore, there is an urgent need for a pressing mechanism design that can quickly and conveniently adapt to the top force-bearing structure of different types of wind turbine brakes, so as to significantly improve the versatility and testing efficiency of the testing equipment. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide a wind turbine brake spring force value testing device, which effectively solves the problem of multi-model compatibility caused by the single pressing mechanism of existing equipment, thereby greatly simplifying the testing process and improving testing efficiency.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A wind turbine brake spring force testing device includes a workbench with an installation station and a testing station. A conveying mechanism is provided between the installation station and the testing station. The conveying mechanism carries a brake fixture and moves back and forth between the installation station and the testing station. Above the workbench and at the test station, there is a lifting mechanism and a pressing mechanism. The lifting mechanism includes a lifting platform parallel to the workbench, which can move up and down in the height direction. The pressing mechanism is installed at the bottom of the lifting platform and includes multiple pressing units. The pressing end of any pressing unit includes a pressure sensor. The pressing end is the end that acts on the brake under test.

[0008] It also includes a displacement sensing module, the position of which can be adjusted in the height direction via an adjustment mechanism. When the equipment is in testing mode, the top of the displacement sensing module extends through and is higher than the upper surface of the brake under test. When the conveying mechanism moves, the displacement sensing module is located below the worktable. The height-adjustable displacement sensing module can adapt to the height requirements of different brake models.

[0009] It is worth noting that when the equipment is in the testing state, the brake fixture, the corresponding pressing unit, and the displacement sensing module are in a coaxial state.

[0010] Furthermore, the lifting mechanism includes a support platform parallel to the lifting platform, with multiple support columns vertically installed between the support platform and the worktable. The lifting platform is slidably connected to the support columns, and a drive electric cylinder is installed on the support platform. The output end of the drive electric cylinder is vertically downward and connected to the lifting platform. The extension and retraction of the output end of the drive electric cylinder drives the lifting platform to move up and down along the support columns.

[0011] Furthermore, the pressing mechanism includes a mounting plate parallel to the lifting platform. The bottom of the mounting plate is provided with a first pressing unit and a second pressing unit at intervals. A translation mechanism is provided between the lifting platform and the mounting plate. The translation mechanism can drive the mounting plate to translate along the length direction of the worktable, and the mounting plate has a first position and a second position in its translation direction. When the mounting plate is in the first position, the second pressing unit faces the test station; when the mounting plate is in the second position, the first pressing unit faces the test station.

[0012] Furthermore, the translation mechanism includes a translation cylinder, a translation guide rail, and a connecting seat. The translation guide rail is fixedly installed on the upper end of the mounting plate and is aligned with the length direction of the workbench. The lifting platform is fixedly installed with a slider and a translation cylinder. The slider is slidably connected to the translation guide rail. The connecting seat is fixedly installed at one end of the mounting plate near the test station. The output end of the translation cylinder is connected to the connecting seat. The translation mechanism also includes a limiting component that restricts the mounting plate to a first position or a second position.

[0013] Furthermore, the limiting component includes a positioning pin and a positioning block. The positioning block is fixedly set on the side of the mounting plate. The top of the positioning block has a pin hole. The mounting plate drives the positioning block to move synchronously to the first position or the second position. The lifting plate has a positioning hole corresponding to the pin hole. The positioning pin can pass through the positioning hole and be inserted into the positioning pin. The bottom of the lifting platform is provided with a limit block in the direction of movement of the mounting plate. When the mounting plate is in the first position, the positioning block contacts the limit block.

[0014] Furthermore, the first pressing unit and the second pressing unit have the same structure, both including a fixed base, a pressure block and a pressure plate. The fixed base is fixedly connected to the mounting plate, the pressure block is located below the fixed base, the pressure sensor is located between the pressure block and the fixed base, and the pressure plate is detachably installed at the bottom of the pressure block.

[0015] Furthermore, the conveying mechanism includes a slide rail, a slide table, and a magnetic couple rodless cylinder. The slide rail is arranged along the length of the worktable, the slide table is slidably connected to the slide rail, the brake fixture is detachably installed on the upper end of the slide table, the output direction of the magnetic couple rodless cylinder is consistent with the extension direction of the slide rail, and the moving part of the magnetic couple rodless cylinder is connected to the slide table through a connecting block; the installation station and the testing station are located at both ends of the slide rail, respectively.

[0016] The magnetic coupler rodless cylinder is equipped with proximity switches at both ends, and a stop block is installed at the end of the slide rail located at the test station. A buffer is installed on the stop block.

[0017] Furthermore, the brake tooling has support pins that match the grooves at the bottom of the brake, and multiple support pins are provided and evenly distributed circumferentially.

[0018] Furthermore, the adjustment mechanism includes a bracket, a mounting base, and a drive cylinder. The bracket is installed at the bottom of the workbench and includes a lifting guide rail arranged along the height direction. The mounting base is slidably connected to the lifting guide rail, the displacement sensing module is installed on the mounting base, and the drive cylinder is fixedly installed at the lower end of the bracket. The output end of the drive cylinder is connected to the mounting base.

[0019] Furthermore, a protective cover is installed on the workbench and at the testing station. The pressure plate mechanism and the lifting mechanism are located inside the cover. A viewing window is provided on the front side of the cover. An opening for the brake fixture to pass through is provided on the side of the cover near the installation station. A grating sensor is installed at the viewing window and the opening respectively.

[0020] The beneficial technical effects of this utility model are: This invention enables the mounting plate to switch the pressure unit via a translation mechanism, effectively solving the problem of multi-model compatibility caused by the single pressure mechanism in existing equipment. It realizes rapid switching testing of the top force structure of different brake models, improves testing efficiency, and meets the batch testing requirements of rapid switching of multiple models in the wind power industry. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model (including the protective cover and the equipment frame). Figure 2 This is a schematic diagram of the overall structure of this utility model (front view, the brake fixture is located at the test station, and the mounting plate is located at the first position). Figure 3 yes Figure 2 A three-dimensional schematic diagram; Figure 4 This is a structural diagram of the pressing mechanism and the translation mechanism (the mounting plate is located in the first position); Figure 5 yes Figure 2 A magnified view of a portion of the image; Figure 6 This is a structural diagram of the adjustment mechanism and sensor module (sensor module lowered below the worktable). Figure 7 This is a structural diagram of the conveying mechanism (the brake fixture is located at the installation position). Figure 8 This is a structural schematic diagram of the brake fixture (including the brake under test); The parts in the attached diagram are labeled as follows: 1. Workbench; 11. Installation station; 12. Testing station; 13. Protective cover; 131. Viewing window; 132. Through port; 133. Optical grating sensor; 2. Conveying mechanism; 21. Slide rail; 22. Slide table; 23. Magnetic couple rodless cylinder; 231. Moving part; 232. Proximity switch; 233. Connecting block; 24. Stop block; 241. Buffer; 3. Lifting mechanism; 31. Lifting platform; 32. Support platform; 33. Support column; 34. Drive cylinder; 4. Pressing mechanism; 41. Mounting plate; 42. First pressing unit; 43. Second pressing unit; 44. Pressure sensor; 45. Fixing base; 46. Pressing block; 47. Pressing plate; 5. Translation mechanism; 51. Translation cylinder; 52. Translation guide rail; 53. Connecting seat; 54. Slider; 55. Limiting assembly; 551. Positioning pin; 552. Positioning block; 5521. Pin hole; 553. Positioning hole; 554. Limiting block; 6. Adjustment mechanism; 61. Bracket; 62. Mounting base; 621. Lifting guide rail; 63. Drive cylinder; 70. Brake fixture; 701. Support pin; 71. Brake under test; 8. Sensor module. Detailed Implementation

[0022] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0023] This specific embodiment discloses in detail a wind turbine brake spring force value testing device, such as... Figures 1 to 8 As shown, the system includes a workbench 1, on which an installation station 11 and a testing station 12 are provided. The installation station 11 is used to place the brake under test 71 onto the brake fixture 70, while the testing station 12 is used to perform spring force value testing. To facilitate material transfer between the two stations, a conveying mechanism 2 is provided between the installation station 11 and the testing station 12. This conveying mechanism 2 carries the brake fixture 70 (along with the brake under test 71 on it) and moves it back and forth between the installation station 11 and the testing station 12.

[0024] Located above the workbench 1 and directly above the test station 12, a lifting mechanism 3 and a pressing mechanism 4 are installed. The lifting mechanism 3 includes a lifting platform 31 parallel to the workbench 1, which can move up and down in the height direction, i.e., perpendicular to the workbench 1. The pressing mechanism 4 is fixedly installed at the bottom of the lifting platform 31, with its pressing end facing the workbench 1. A pressure sensor 44 is installed at the pressing end to detect the applied pressure value in real time. The final point of action of the pressing end is on the upper surface of the brake 71 under test, to simulate the force applied to the brake spring under actual working conditions.

[0025] In addition, the device is equipped with a displacement sensing module 8. This displacement sensing module 8 is mounted via an adjustment mechanism 6, which can drive the displacement sensing module 8 to adjust its position in the height direction. The ingenious design of the device lies in the fact that when the device is in testing mode, the top of the displacement sensing module 8 can extend upwards and above the upper surface of the brake under test 71, thereby measuring its compression displacement; while when the conveying mechanism 2 needs to move the brake fixture 70 in and out of the testing station 12, the adjustment mechanism 6 will drive the displacement sensing module 8 down to below the worktable 1, avoiding interference with the moving fixture. It is particularly important to emphasize that during testing, the brake fixture 70 (loading the brake under test 71), the pressing end of the pressing mechanism 4, and the displacement sensing module 8 must be precisely coaxial to ensure the accuracy and reliability of the test data.

[0026] Specifically, the lifting mechanism 3 includes a support platform 32 parallel to the lifting platform 31. The support platform 32 is supported and fixed by multiple support columns 33 vertically installed between it and the worktable 1. The lifting platform 31 is slidably connected to the support columns 33 via linear bearings, which are not shown separately in the diagram and are usually located at the four corners of the lifting platform. A drive electric cylinder 34 or a pneumatic cylinder is installed on the support platform 32. The output end of the drive electric cylinder 34 extends vertically downward and is connected to the lifting platform 31. By controlling the extension and retraction of the output end of the drive electric cylinder 34, the lifting platform 31 and its pressing mechanism 4 can be precisely driven to move up and down along the support columns 33.

[0027] The pressing mechanism 4 includes a mounting plate 41 parallel to the lifting platform 31. At the bottom of the mounting plate 41, two identical pressing units are spaced apart: a first pressing unit 42 and a second pressing unit 43, which can correspond to different types or sizes of brakes. To enable switching between these two pressing units, a translation mechanism 5 is provided between the lifting platform 31 and the mounting plate 41. The translation mechanism 5 can drive the mounting plate 41 to move horizontally along the length of the workbench 1. The mounting plate 41 has two preset working positions in its translation direction: a first position and a second position. When the mounting plate 41 is moved to the first position, the center point of the second pressing unit 43 is directly opposite the test station 12 below; when the mounting plate 41 is moved to the second position, the center point of the first pressing unit 42 is now directly opposite the test station 12.

[0028] The translation mechanism 5 includes a translation cylinder 51, a translation guide rail 52, and a connecting seat 53. The translation guide rail 52 is fixedly mounted on the upper surface of the mounting plate 41, and its extension direction is consistent with the length direction of the worktable 1. The translation cylinder 51 and a slider 54 that cooperates with the translation guide rail 52 are fixedly mounted on the lifting platform 31. The slider 54 and the translation guide rail 52 form a sliding pair. The connecting seat 53 is fixedly mounted on one end or side of the mounting plate 41 near the test station 12. The output end of the translation cylinder 51 is connected to the connecting seat 53, and its telescopic movement pushes or pulls the mounting plate 41 to move. To ensure that the mounting plate 41 can accurately stop at the first position or the second position, the translation mechanism 5 is also provided with a limit component 55.

[0029] One embodiment of the limiting component 55 includes a positioning pin 551 and a positioning block 552. The positioning block 552 is fixedly disposed on the side of the mounting plate 41. A pin hole 5521 is provided on the top of the positioning block 552. When the mounting plate 41 is driven to a first position or a second position by the translation mechanism 5, the positioning block 552 moves into position accordingly. At this time, a positioning hole 553 corresponding to the pin hole 5521 is provided on the lifting platform 31 or a component fixed thereto. The operator or automatic device can pass the positioning pin 551 through the positioning hole 553 and insert it into the pin hole 5521 on the positioning block 552, thereby firmly locking the mounting plate 41 in this position. As an auxiliary positioning, limiting blocks 554 are provided on both sides of the bottom of the lifting platform 31 in the direction of movement of the mounting plate 41. For example, when the mounting plate 41 moves to the first position, the positioning block 552 or other protruding structure on its side will contact the corresponding limiting block 554, playing a hard limiting role.

[0030] The first pressing unit 42 and the second pressing unit 43 have the same structure, both including a fixed base 45, a pressure block 46, and a pressure plate 47. The fixed base 45 is fixedly connected to the mounting plate 41 by bolts or other means. The pressure block 46 is located below the fixed base 45. A pressure sensor 44 is precisely positioned between the pressure block 46 and the fixed base 45 to sense the pressure transmitted from the pressure block 46. The pressure plate 47 is detachably mounted to the bottom of the pressure block 46 by bolts or other means, serving as the component that directly contacts the brake 71 under test. Different pressure plates 47 can be designed with different shapes or sizes to adapt to the contact surface requirements of different brakes under test.

[0031] The conveying mechanism 2 includes a slide rail 21, a slide table 22, and a magnetic coupler rodless cylinder 23. The slide rail 21 is fixedly laid on the worktable 1 along its length. The slide table 22 is slidably connected to the slide rail 21 via components such as a slider. The brake fixture 70 is detachably mounted on the upper surface of the slide table 22 via positioning pins, bolts, or quick clamps. The main body of the magnetic coupler rodless cylinder 23 is fixedly mounted on the worktable 1, and its output direction, i.e., its moving direction, is consistent with the extension direction of the slide rail 21. The moving part 231 of the magnetic coupler rodless cylinder 23 is connected to the slide table 22 via a connecting block 233, thereby driving the slide table 22 and the fixture to move along the slide rail 21. The installation station 11 and the testing station 12 are located at both ends of the slide rail 21, respectively. In order to achieve precise stopping and buffering of the slide table 22 at both ends, proximity switches 232 are respectively provided at both ends of the magnetic coupler rodless cylinder 23 to detect the limit position of the moving part 231. Meanwhile, a stop 24 is provided at one end of the slide rail 21 located at the test station 12. A buffer 241, such as a hydraulic buffer, is installed on the stop 24 to absorb the impact when the slide table 22 reaches the end point.

[0032] The core feature of the brake fixture 70 is that it has multiple support pins 701 on its top. The shape and distribution of these support pins 701 are designed to precisely match the mounting grooves or holes on the bottom of the brake under test 71, that is, they are evenly distributed circumferentially, so as to stably support the brake body during testing and ensure that its center position is aligned with the pressing mechanism and displacement sensing module.

[0033] The adjustment mechanism 6, used to control the lifting and lowering of the displacement sensing module 8, includes a bracket 61, a mounting base 62, and a drive cylinder 63. The bracket 61 is fixedly mounted on the bottom of the worktable 1. A lifting guide rail 621 extending along the height direction is provided on the bracket 61. The mounting base 62 is slidably connected to the lifting guide rail 621. The displacement sensing module 8 is fixedly mounted on the mounting base 62. The drive cylinder 63 is fixedly mounted on the lower end of the bracket 61, with its output end facing upwards and connected to the mounting base 62. By extending or retracting the drive cylinder 63, the mounting base 62 and the displacement sensing module 8 can be driven to rise or fall along the lifting guide rail 621.

[0034] For operational safety and environmental isolation, a protective cover 13 is installed on the workbench 1 and in the testing station 12 area. The main bodies of the pressing mechanism 4 and the lifting mechanism 3 are both located inside the cover 13. A viewing window 131 is provided on the front side of the cover 13 for easy observation of the testing process. An opening 132 for the brake fixture 70 to pass through is provided on the side of the cover 13 near the installation station 11. To ensure safety and prevent personnel from entering the danger zone while the equipment is running, a grating sensor 133 and a safety light curtain are respectively installed on the inner edge of the viewing window 131 and the inner edge of the opening 132. Once an obstruction is detected, the equipment will stop immediately.

[0035] It is worth reiterating that, in order to enable the displacement sensing module 8 to smoothly extend through the central hole of the brake under test 71 to measure the displacement of its upper surface, the slide 22, the worktable 1, and the center of the brake fixture 70 are all provided with through slots. These through slots are aligned in the vertical direction, providing the necessary channels for the lifting and lowering of the displacement sensing module 8.

[0036] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A test device for the spring force value of a wind turbine brake, characterized in that: Includes a workbench (1), on which an installation station (11) and a testing station (12) are provided. A conveying mechanism (2) is provided between the installation station and the testing station. The conveying mechanism carries a brake fixture and moves back and forth between the installation station and the testing station. A lifting mechanism (3) and a pressing mechanism (4) are provided above the workbench and at the test station. The lifting mechanism includes a lifting platform (31) parallel to the workbench. The lifting platform can move up and down in the height direction. The pressing mechanism is installed at the bottom of the lifting platform. The pressing mechanism includes multiple pressing units. The pressing end of any pressing unit includes a pressure sensor (44). It also includes a displacement sensing module (8), the position of the displacement sensing module in the height direction can be adjusted by the adjustment mechanism (6); when the equipment is in the test state, the top of the displacement sensing module extends through and is higher than the upper surface of the brake under test; when the conveying mechanism moves, the displacement sensing module is located below the worktable.

2. The wind turbine brake spring force testing device according to claim 1, characterized in that: The lifting mechanism includes a support platform (32) parallel to the lifting platform. Multiple support columns (33) are vertically installed between the support platform and the workbench. The lifting platform is slidably connected to the support columns. A drive electric cylinder (34) is installed on the support platform. The output end of the drive electric cylinder is vertically downward and connected to the lifting platform. The lifting platform is driven to move up and down along the support columns by the extension and retraction of the output end of the drive electric cylinder.

3. The wind turbine brake spring force testing device according to claim 1, characterized in that: The pressing mechanism includes a mounting plate (41) parallel to the lifting platform. The bottom of the mounting plate is provided with a first pressing unit (42) and a second pressing unit (43) spaced apart. A translation mechanism (5) is provided between the lifting platform and the mounting plate. The translation mechanism can drive the mounting plate to translate along the length direction of the workbench, and the mounting plate has a first position and a second position in its translation direction. When the mounting plate is in the first position, the second pressing unit is facing the test station; when the mounting plate is in the second position, the first pressing unit is facing the test station.

4. The wind turbine brake spring force testing device according to claim 3, characterized in that: The translation mechanism includes a translation cylinder (51), a translation guide rail (52), and a connecting seat (53). The translation guide rail is fixedly installed on the upper end of the mounting plate and is aligned with the length direction of the workbench. The lifting platform is fixedly installed with a slider (54) and the translation cylinder. The slider is slidably connected to the translation guide rail. The connecting seat is fixedly installed at one end of the mounting plate near the test station. The output end of the translation cylinder is connected to the connecting seat. The translation mechanism further includes a limiting component (55) that restricts the mounting plate to be in the first position or the second position.

5. The wind turbine brake spring force testing device according to claim 4, characterized in that: The limiting component includes a positioning pin (551) and a positioning block (552). The positioning block is fixedly disposed on the side of the mounting plate. The top of the positioning block has a pin hole (5521). The mounting plate drives the positioning block to move synchronously to the first position or the second position. The lifting plate has a positioning hole (553) corresponding to the pin hole. The positioning pin can pass through the positioning hole and be inserted into the positioning pin. The bottom of the lifting platform is provided with a limit block (554) in the moving direction of the mounting plate. When the mounting plate is in the first position, the positioning block contacts the limit block.

6. The wind turbine brake spring force testing device according to claim 3, characterized in that: The first pressing unit and the second pressing unit have the same structure, both including a fixed base (45), a pressing block (46) and a pressing plate (47). The fixed base is fixedly connected to the mounting plate. The pressing block is disposed below the fixed base. The pressure sensor is disposed between the pressing block and the fixed base. The pressing plate is detachably installed at the bottom of the pressing block.

7. The wind turbine brake spring force testing device according to claim 1, characterized in that: The conveying mechanism includes a slide rail (21), a slide table (22), and a magnetic couple rodless cylinder (23). The slide rail is arranged along the length of the worktable, the slide table is slidably connected to the slide rail, the brake fixture is detachably installed on the upper end of the slide table, the output direction of the magnetic couple rodless cylinder is consistent with the extension direction of the slide rail, and the moving part of the magnetic couple rodless cylinder is connected to the slide table through a connecting block (233).

8. The wind turbine brake spring force testing device according to claim 1, characterized in that: The brake fixture has a support pin (701) that matches the groove at the bottom of the brake, and the support pin is provided in multiple and evenly distributed circumferentially.

9. The wind turbine brake spring force testing device according to claim 1, characterized in that: The adjustment mechanism includes a bracket (61), a mounting base (62), and a drive cylinder (63). The bracket is installed at the bottom of the workbench. The bracket includes a lifting guide rail (621) arranged along the height direction. The mounting base is slidably connected to the lifting guide rail. The displacement sensing module is installed on the mounting base. The drive cylinder is fixedly installed at the lower end of the bracket. The output end of the drive cylinder is connected to the mounting base.

10. A wind turbine brake spring force testing device according to claim 1, characterized in that: A protective cover (13) is provided on the workbench and at the test station. The pressing mechanism and the lifting mechanism are located inside the cover. A viewing window (131) is provided on the front side of the cover. A passage (132) for the brake fixture to pass through is provided on the side of the cover near the installation station. A grating sensor (133) is provided at the viewing window and the passage, respectively.

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