Test board

Abstract

The utility model relates to a test bench and a shafting used for a wind turbine generator, the shafting comprises a main shaft, a bearing seat and a to-be-tested bearing arranged between the main shaft and the bearing seat, the test bench comprises a base, a loading mechanism, a buffer member and a first monitoring member, the base is used for fixing the bearing seat, the loading mechanism comprises a plurality of loading devices, and the buffer member is arranged on the base. The multiple loading devices are connected to the main shaft and apply radial loads and axial loads to the main shaft respectively, the buffer piece is arranged on a loading path of at least one loading device, and the first monitoring piece is arranged on the buffer piece and is configured to monitor the numerical value of the loads. According to the test board in the embodiment of the invention, the dynamic load precision and the process controllability in the test process can be ensured, the working condition simulation capability of the test board is improved, and the accuracy of a test result is ensured.

Description

Technical Field

[0001] The present application relates to the field of wind power technology, and in particular to a test bench. Background Art

[0002] The impeller of a wind turbine generator set rotates to drive the generator inside the nacelle, thereby achieving wind power generation. The force exerted on the impeller in the air will be transmitted to the generator. To ensure product quality, wind turbine generator sets usually need to conduct simulated loading tests on the test bench before leaving the factory to detect the wind turbine generator set's ability to withstand loads.

[0003] However, existing test benches are mostly used for simulation testing of bearings under static conditions, but have limited simulation capabilities under complex conditions, making it difficult to achieve high-precision dynamic loading, which affects the evaluation results of the performance of the bearings under test. Utility Model Content

[0004] The present application provides a test bench that can ensure the dynamic load accuracy and process controllability of the test process and improve the working condition simulation capability of the test bench.

[0005] According to an embodiment of the present application, a test bench is proposed for a shaft system of a wind turbine generator set, wherein the shaft system includes a main shaft, a bearing seat, and a bearing to be tested arranged between the main shaft and the bearing seat, and the test bench includes: a base for fixing the bearing seat; a loading mechanism including a plurality of loading devices, wherein the plurality of loading devices are connected to the main shaft and apply radial loads and axial loads to the main shaft respectively; a buffer member arranged on a loading path of at least one loading device; and a first monitoring member arranged on the buffer member and configured to monitor the load value.

[0006] According to one aspect of an embodiment of the present application, the loading device includes a fixed seat, a loading member and an adapter. The adapter is used to be connected to the main shaft. The loading member is supported on the fixed seat. The loading member is connected to the adapter through a buffer and applies a load to the adapter.

[0007] According to one aspect of an embodiment of the present application, the buffer member includes a first shell, a second shell and an elastic deformable member; one of the first shell and the second shell is connected to the adapter, and the other is connected to the loading member, the first shell and the second shell define a buffer space, the elastic deformable member and the first monitoring member are located in the buffer space, and the elastic deformation direction of the elastic deformable member is the same as the extension direction of the loading path.

[0008] According to one aspect of the embodiment of the present application, the multiple loading devices include a radial loading device and an axial loading device, and the buffer is at least arranged on the loading path of the axial loading device.

[0009] According to one aspect of an embodiment of the present application, the axial loading device and the radial loading device are respectively located on both sides of the base along the axial direction, and the adapters of the axial loading device and the radial loading device are respectively connected to the two ends of the main shaft; and / or, the axial loading device and the radial loading device are located on the same side of the base along the axial direction, and the adapter of the axial loading device is connected to the adapter of the radial loading device.

[0010] According to one aspect of an embodiment of the present application, in a radial loading device, the adapter includes a loading arm and a radial loading bearing, the loading arm includes a connecting end and a loading end arranged opposite to each other in the axial direction, the connecting end is used to be connected to the main shaft, the radial loading bearing is arranged at the loading end of the loading arm, and the loading member is connected to the radial loading bearing and applies a radial load to the radial loading bearing.

[0011] According to one aspect of an embodiment of the present application, in an axial loading device, the adapter includes an axial loading bearing and a main body connected to one side of the axial loading bearing, the axial loading bearing is arranged at the loading end of the main shaft and / or the loading arm, and the loading member is connected to the main body through a buffer member and applies an axial load to the main body.

[0012] According to one aspect of the embodiment of the present application, the length of the loading arm along the axial direction is adjustable.

[0013] According to one aspect of the embodiment of the present application, the loading arm includes a plurality of loading segments arranged along the axial direction, and two adjacent loading segments are detachably connected.

[0014] According to one aspect of an embodiment of the present application, the loading device also includes a joint bearing, which is arranged on a fixed seat, and the loading member is rotatably connected to the fixed seat through the joint bearing, and / or the joint bearing is arranged on an adapter, and the buffer member is rotatably connected to the adapter through the joint bearing.

[0015] According to one aspect of an embodiment of the present application, the test bench also includes: a driving device, which is arranged on one side of the base along the axial direction, and the output end of the driving device is used to be connected to the main shaft and drive the main shaft to rotate axially; a second monitoring device, which is connected to the driving device and is used to monitor the output torque of the driving device.

[0016] According to one aspect of an embodiment of the present application, the driving device includes a driving member, a coupling and a reducer, the coupling connects the output end of the driving member and the reducer, and the second monitoring member is arranged on the coupling.

[0017] The test bench provided in the embodiment of the present application includes a base, a loading mechanism, a buffer and a first monitoring member. The shaft system is fixed on the base, and an axial load and a radial load are applied to the main shaft through the loading mechanism, so as to achieve the performance test of the bearing to be tested. Among them, a buffer is provided on the loading path of at least one loading device, so when the loading device applies a load to the main shaft, the impact of the loading device on the main shaft can be reduced by the buffer, and the stability of dynamic loading can be improved. At the same time, by setting the first monitoring member to monitor the actual load on the main shaft after buffering, it plays a role in precise load control, thereby improving the working condition simulation capability of the test bench, and ensuring the dynamic load accuracy and process controllability of the test process, and improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 It is a structural schematic diagram of a test bench according to an embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of a test bench of another embodiment of the present application;

[0021] Figure 3 is a partial top view of a test bench according to another embodiment of the present application;

[0022] Figure 4 It is a structural schematic diagram of a loading mechanism of an embodiment of the present application.

[0023] In the attached figure:

[0024] 10-test bench; 20-axis system;

[0025] 1-base; 11-carrying body; 12-connecting body; 2-loading mechanism; 21-loading device; 211-fixed seat; 212-loading member; 213-adapter; 214-spherical bearing; 22-first connecting flange; 3-buffer; 4-first monitoring member; 5-driving device; 51-driving member; 52-coupling; 53-reducer; 54-second connecting flange; 6-second monitoring member;

[0026] 21a-axial loading device; 211a-second fixed seat; 212a-second loading member; 213a-second adapter; 2131a-axial loading bearing; 2132a-main body; 214a-second joint bearing;

[0027] 21b- radial loading device; 211b- first fixing seat; 212b- first loading member; 213b- first adapter; 2131b- loading arm; 2132b- radial loading bearing; 214b- first joint bearing;

[0028] X-axial direction; Y-radial direction.

[0029] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0031] The directional words appearing in the following description are all directions shown in the figure, and do not limit the test bench of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In order to better understand this application, Figures 1 to 4 The test bench according to the embodiment of the present application is described in detail.

[0033] See also Figure 1 , Figure 1 A schematic diagram of the structure of a test bench 10 provided in an embodiment of the present application. The present application embodiment provides a test bench 10, which is used for a shaft system 20 of a wind turbine generator set, wherein the shaft system 20 includes a main shaft, a bearing seat, and a bearing to be tested disposed between the main shaft and the bearing seat, and the test bench 10 includes a base 1, a loading mechanism 2, and a buffer 3, wherein the base 1 is used to fix the bearing seat, the loading mechanism 2 includes a plurality of loading devices 21, and the plurality of loading devices 21 are connected to the main shaft and apply radial loads and axial loads to the main shaft respectively, and the buffer 3 is disposed on the loading path of at least one loading device 21, and a first monitoring member 4 is disposed on the buffer 3 and is configured to monitor the value of the load.

[0034] The test bench 10 provided in the embodiment of the present application, when testing the shaft system 20, will install the shaft system 20 on the base 1, and fix the bearing seat to the base 1, and the loading mechanism 2 includes a plurality of loading devices 21, and the loading devices 21 are used to load the main shaft and transfer it to the bearing to be tested, so as to achieve the performance test of the bearing to be tested. Among them, a buffer 3 is provided on the loading path of at least one loading device 21, so when the loading device 21 applies a load to the main shaft, the buffer 3 can reduce the impact of the loading device 21 on the main shaft, and improve the stability of dynamic loading. At the same time, by setting the first monitoring component 4 to monitor the actual load on the main shaft after buffering, it plays a role in precise load control, thereby improving the working condition simulation capability of the test bench 10, and ensuring the dynamic load accuracy and process controllability of the test process, and improving the accuracy of the test results.

[0035] It is understandable that the test bench 10 uses the assembled wind turbine shaft system 20 as the test object, thereby being able to simulate the load on the actual wind turbine shaft system 20 . The test result can directly reflect the state of the tested bearing, and the test result is more accurate.

[0036] See also Figure 1 In the actual operation of the wind turbine generator set, in addition to being subjected to axial loads and radial loads, the shaft system 20 of the wind turbine generator set will also rotate under the drive of the impeller. Therefore, in some optional embodiments, the test bench 10 also includes a driving device 5 and a second monitoring component 6. The driving device 5 is arranged on one side of the base 1 along the axial direction X. The output end of the driving device 5 is used to be connected to the main shaft and drive the main shaft to rotate around the axial direction X. The second monitoring component 6 is connected to the driving device 5 and is used to monitor the output torque of the driving device 5.

[0037] By setting the driving device 5 to drive the main shaft to rotate, the test conditions of the shaft system 20 of the wind turbine can be made consistent with the actual application scenario, thereby more accurately reflecting the state of the tested bearing and improving the accuracy of the test. In addition, by setting the second monitoring component 6, the output torque of the driving device 5 can be monitored in real time to ensure the dynamic load accuracy and process controllability of the test process.

[0038] Optionally, the second monitoring component 6 can be configured as a torque sensor.

[0039] In some optional embodiments, the driving device 5 includes a driving member 51 , a coupling 52 and a reducer 53 , the coupling 52 is connected to the output end of the driving member 51 and the reducer 53 , and the second monitoring member 6 is disposed on the coupling 52 .

[0040] Among them, during the design, the driving member 51 must meet the friction force of the entire transmission under the maximum bending moment load and the inertia force generated by the acceleration of the rotating part. The reducer 53 can determine the initial transmission ratio according to the predetermined rotational speed of the wind turbine shaft system 20 and the rotational speed of the driving member 51 to ensure that the wind turbine shaft system 20 can rotate at a predetermined speed under the drive of the driving device 5.

[0041] Optionally, the driving member 51 may be configured as a driving motor, that is, the driving motor is connected to the main shaft of the wind turbine shaft system 20 through a reducer 53 and a coupling 52, thereby driving the main shaft to rotate at a predetermined speed.

[0042] The test bench 10 in the embodiment of the present application can be used to implement dynamic loading tests of the bearing to be tested under fatigue test conditions and the shaft system 20 under non-stable conditions such as variable speed and variable load, thereby simulating the robustness test of the bearing to be tested under dynamic loads caused by wind speed changes, direction changes, shutdown and startup in a real environment, and monitoring the test conditions in real time through the first monitoring component 4 and the second monitoring component 6, so as to more reliably implement simulation tests of the bearing to be tested under various loading conditions, further improving the accuracy of the test results.

[0043] For each structure of the test bench 10 , the base 1 is the most important load-bearing component for fixing the shaft system 20 , so the base 1 can be fixed on the foundation. In addition, the base 1 can also be provided with reinforcing ribs to increase the strength of the base 1 to ensure the stability of the test bench 10 .

[0044] Optionally, the base 1 may include a bearing body 11 and a connecting body 12 detachably connected to the bearing body 11, and the connecting body 12 is used to connect to the bearing seat. The end of the loading device 21 facing the main shaft is detachably connected to the first connecting flange 22, and the first adapter 213b is connected to the main shaft through the first connecting flange 22. Similarly, the end of the driving device 5 facing the main shaft is detachably connected to the second connecting flange 54. Among them, the first connecting flange 22, the second connecting flange 54 and the connecting body 12 have various specifications, so that according to the structure of the shaft system 20, only the connecting body 12, the first connecting flange 22 and the second connecting flange 54 need to be replaced to achieve the installation and performance testing of shaft systems 20 of various specifications and sizes, thereby improving the applicability of the test bench 10.

[0045] Optionally, the bearing body 11 forms a bearing surface for bearing the shaft system 20. According to the matching requirements of the base 1 and the bearing seat, the bearing surface can be set horizontally or formed with a certain inclination angle, which can meet the requirements of realizing axial X and radial loading of the main shaft through the loading device 21 after the bearing seat is fixed to the base 1.

[0046] With respect to the loading device 21 , since the loading device 21 is the main loading component of the wind turbine shaft system 20 , the loading device 21 needs to ensure that the load can be stably transmitted to the bearing to be tested.

[0047] In some optional embodiments, the loading device 21 includes a fixed seat 211, a loading member 212 and an adapter 213, the adapter 213 is used to connect with the main shaft, the loading member 212 is supported on the fixed seat 211, and the loading member 212 is connected to the adapter 213 through the buffer 3 and applies a load to the adapter 213. That is, the buffer 3 can be integrated into the loading device 21 and arranged at the output end of the loading member 212, so that when the loading member 212 applies a load, the impact of the load can be reduced by the buffer 3, so that the load can stably act on the main shaft through the adapter 213.

[0048] Optionally, the loading member 212 can be configured as a hydraulic cylinder, and the hydraulic loading end can use digital hydraulic technology to achieve load control, further improving the dynamic loading accuracy and stability. The buffer 3 is used to buffer the impact of the loading device 21 on the spindle. According to the impact resistance requirements of the buffer 3, the buffer 3 can be configured as at least one of a spring buffer, a liquid buffer, and a gas buffer.

[0049] See also Figure 1 When the buffer 3 is set as a spring buffer, in some optional embodiments, the buffer 3 includes a first shell, a second shell and an elastic deformation member, one of the first shell and the second shell is connected to the adapter 213, and the other is connected to the loading member 212, the first shell and the second shell define a buffer space, the elastic deformation member and the first monitoring member 4 are located in the buffer space, and the elastic deformation direction of the elastic deformation member is the same as the extension direction of the loading path.

[0050] Taking the example of the first shell being connected to the output end of the loader 212 and the second shell being connected to the adapter 213, when the loader 212 applies a load to the first shell, the load will first be transmitted to the elastic deformation part in the buffer space through the first shell. The elastic deformation part will undergo elastic deformation to mitigate part of the impact, and then the load will be applied to the main shaft through the adapter 213. The first monitoring part 4 is arranged in the buffer space and can monitor the load applied to the main shaft in real time, thereby improving the controllability of the test.

[0051] By making the elastic deformation direction of the elastic deformable member the same as the extension direction of the loading path, the buffering effect on the load can be improved, the force-bearing reliability of the elastic deformable member can be improved, and the service life of the elastic deformable member can be extended.

[0052] Optionally, the elastic deformation member is a spring, and the first monitoring member 4 may be a force sensor.

[0053] In the process of loading test on the shaft system 20, axial loading and radial loading of the shaft system 20 are required. In some optional embodiments, the multiple loading devices 21 include radial loading devices 21b and axial loading devices 21a, and the buffer member 3 is at least arranged on the loading path of the axial loading device 21a.

[0054] The radial loading device 21b is used to apply a radial load to the main shaft, and the axial loading device 21a is used to apply an axial load to the main shaft, thereby realizing radial loading and axial loading of the wind turbine shaft system 20, so as to equivalently simulate the actual load of the wind turbine shaft system 20. In addition, since the radial loading and the axial loading are respectively loaded by the radial loading device 21b and the axial loading device 21a, the radial loading and the axial loading can be decoupled, and the two can be loaded synchronously without interfering with each other, and the coupling effect of multiple systems is eliminated, and the loading is more accurate.

[0055] The buffer 3 is at least arranged on the loading path of the axial loading device 21a, and the buffer 3 may be integrated only in the axial loading device 21a, or may be integrated in both the axial loading device 21a and the radial loading device 21b. Since the loading range of the radial loading device 21b is larger than that of the axial loading device 21a, by integrating the buffer 3 at least in the axial loading device 21a with a smaller loading range, the stability of the applied load can be more reliably controlled, and the cost can be controlled, which is more cost-effective.

[0056] For the convenience of description, the following description will be made by taking the example of integrating the buffer component 3 only in the axial loading device 21 a.

[0057] See also Figures 1 to 3 There are multiple layouts for the axial loading device 21a and the radial loading device 21b. In some optional embodiments, the axial loading device 21a and the radial loading device 21b are respectively located on both sides of the base 1 along the axial direction X, and the adapters 213 of the axial loading device 21a and the radial loading device 21b are respectively connected to the two ends of the main shaft.

[0058] By respectively arranging the axial loading device 21a and the radial loading device 21b on both sides of the base 1 in the axial direction X, the axial loading device 21a and the radial loading device 21b can directly load the main shaft. By making the loading force act directly on the main shaft, the force transmission loss can be reduced, thereby improving the reliability of loading.

[0059] In some other optional embodiments, the axial loading device 21a and the radial loading device 21b are located on the same side of the base 1 along the axial direction X, and the adapter 213 of the axial loading device 21a is connected to the adapter 213 of the radial loading device 21b.

[0060] By connecting the adapter 213 of the axial loading device 21a to the adapter 213 of the radial loading device 21b, the loading mechanism 2 can be integrated on the same side of the base 1, which is more convenient for setting the axial loading device 21a and the radial loading device 21b. In addition, the connection between the shaft system 20 and the loading mechanism 2 can be achieved by simply connecting the main shaft of the shaft system 20 to the adapter 213 of the radial loading device 21b, simplifying the connection steps.

[0061] Optionally, when the loading mechanism 2 is integrated on the same side of the base 1 , the loading mechanism 2 can be connected to the front end of the shaft system 20 , and the driving device 5 is connected to the rear end of the shaft system 20 , so as to facilitate the setting of the loading mechanism 2 .

[0062] In some further optional embodiments, the number of the axial loading devices 21 a is more than two, and the more than two axial loading devices 21 a are respectively arranged on both sides of the base 1 along the axial direction X.

[0063] Taking two axial loading devices 21a as an example, one axial loading device 21a and the radial loading device 21b are respectively located on both sides of the base 1 along the axial direction X and are directly connected to the main shaft, and the other axial loading device 21a is arranged on the same side as the radial loading device 21b and is connected to the adapter 213 of the radial loading device 21b. By arranging the axial loading devices 21a on both sides of the base 1 along the axial direction X, the load-bearing condition of the shaft system 20 can be improved, and the loading accuracy and stability can be improved.

[0064] Optionally, buffer components 3 are integrated in each axial loading device 21 a on both sides of the base 1 along the axial direction X.

[0065] It is understandable that the position of the axial loading device 21a can be adjusted according to the space margin on both sides of the base 1 along the axial direction X, and can satisfy the requirement of applying radial load and axial load to the main shaft. The following takes the axial loading device 21a and the radial loading device 21b as an example, which are arranged on the same side and connected to the adapter 213 of the radial loading device 21b, as an example, and the structures of the axial loading device 21a and the radial loading device 21b are described in detail.

[0066] See also Figure 4 For the radial loading device 21b, in some optional embodiments, the adapter 213 includes a loading arm 2131b and a radial loading bearing 2132b, the loading arm 2131b includes a connecting end and a loading end relatively arranged along the axial direction X, the connecting end is used to be connected to the main shaft, the radial loading bearing 2132b is arranged at the loading end of the loading arm 2131b, and the loading member 212 is connected to the radial loading bearing 2132b and applies a radial load to the radial loading bearing 2132b.

[0067] Specifically, the radial loading device 21b includes a first fixed seat 211b, a first loading member 212b and a first adapter 213b. The first adapter 213b includes a loading arm 2131b and a radial loading bearing 2132b. The first loading member 212b applies a radial Y force to the loading end of the loading arm 2131b through the radial loading bearing 2132b, thereby realizing a bending moment loading on the main shaft to equivalently simulate the actual loading of the wind turbine shaft system 20.

[0068] Optionally, the radial loading bearing 2132b may be configured as a spherical roller bearing.

[0069] In some optional embodiments, the length of the loading arm 2131b along the axial direction X is adjustable, so that in addition to being able to adjust the radial load through the first loading member 212b, the distance between the loading end and the connecting end of the loading arm 2131b can be changed by adjusting the length of the loading arm 2131b along the axial direction X, thereby achieving the adjustment of the bending moment loading of the main shaft by the radial loading device 21b. In addition, by making the length of the loading arm 2131b along the axial direction X adjustable, the adjustment range of the bending moment loading can be increased to adapt to the test loading of the bearing of the wind turbine under various working conditions, thereby improving the applicability of the test bench 10.

[0070] In some optional embodiments, the loading arm 2131b includes a plurality of loading segments arranged along the axial direction X, and two adjacent loading segments are detachably connected. The length of the loading arm 2131b along the axial direction X can be adjusted by adjusting the number of loading arms 2131b or replacing loading arms 2131b of different sizes.

[0071] Optionally, two adjacent loading sections can be connected via a flange. By dividing the loading arm 2131b into multiple loading sections and splicing them via flanges, the structural strength of the loading arm 2131b can be improved, making it easier to transfer loads through the loading arm 2131b to achieve reliable loading of the main shaft.

[0072] It is understandable that when the length of the loading arm 2131b along the axial direction X is adjusted, the position of the loading mechanism 2 also needs to be adjusted synchronously so as to achieve reliable loading of the shaft system 20.

[0073] In some embodiments, the first fixing seat 211b of the radial loading device 21b can be detachably connected to the base 1, so that when the length of the loading arm 2131b along the axial direction X is adjusted, the position of the first fixing seat 211b relative to the base 1 is synchronously adjusted to reliably achieve the adjustment of the bending moment loading.

[0074] Alternatively, the first fixing seat 211b of the radial loading device 21b may be separately provided from the base 1, for example, the first fixing seat 211b may also be provided on the foundation, and the connection position of at least one of the base 1 and the first fixing seat 211b along the axial direction X may be adjustable. Taking the example of the adjustable connection position of the first fixing seat 211b along the axial direction X, a slide groove may be provided on one of the foundation and the first fixing seat 211b, and a guide rail matched with the slide groove may be provided on the other. When it is necessary to adjust the length of the loading arm 2131b along the axial direction X, the connection position of the first fixing seat 211b along the axial direction X may be adjusted synchronously, and after being adjusted to a preset position, the first fixing seat 211b may be locked to the foundation by means of bolts or the like, thereby achieving the fixation of the loading mechanism 2.

[0075] See also Figure 4 For the axial loading device 21a, in some optional embodiments, the adapter 213 includes an axial loading bearing 2131a and a main body 2132a connected to one side of the axial loading bearing 2131a, the axial loading bearing 2131a is arranged at the loading end of the main shaft and / or the loading arm 2131b, and the loading member 212 is connected to the main body 2132a through the buffer member 3 and applies an axial load to the main body 2132a.

[0076] Specifically, the axial loading device 21a includes a second fixed seat 211a, a second loading member 212a and a second adapter 213a. The second adapter 213a includes an axial loading bearing 2131a and a main body 2132a connected to one side of the axial loading bearing 2131a. The main body 2132a can be configured as a cover body connected to the loading end of the loading arm 2131b. The second loading member 212a applies an axial load to the cover body through the buffer member 3, and transmits force through the loading arm 2131b, so that the axial load acts on the shaft system 20, so as to equivalently simulate the actual loading of the wind turbine shaft system 20.

[0077] Optionally, the axial loading bearing 2131a may be configured as a three-row column bearing.

[0078] See also Figure 4 In some optional embodiments, the loading device 21 also includes a joint bearing 214, the joint bearing 214 is arranged on the fixed seat 211, and the loading member 212 is rotatably connected to the fixed seat 211 through the joint bearing 214, and / or, the joint bearing 214 is arranged on the adapter 213, and the buffer member 3 is rotatably connected to the adapter 213 through the joint bearing 214.

[0079] Optionally, both the radial loading device 21b and the axial loading device 21a may be provided with spherical bearings 214. For ease of description, the spherical bearings 214 on the radial loading device 21b are defined as first spherical bearings 214b, and the spherical bearings 214 on the axial loading device 21a are defined as second spherical bearings 214a.

[0080] For the radial loading device 21b, the first joint bearing 214b can be arranged at the connecting end of the first fixed seat 211b and the first loading member 212b, that is, the first loading member 212b is rotatably connected to the first fixed seat 211b through the movable first joint bearing 214b, so that it is easier to control the loading force of the first loading member 212b to be output along the radial direction Y, thereby improving the accuracy and effectiveness of the radial loading.

[0081] For the axial loading device 21a, the second joint bearing 214a can be arranged at the connecting end of the second fixed seat 211a and the second loading member 212a, and the connecting end of the buffer member 3 and the second adapter 213a, that is, one end of the second loading member 212a is rotatably connected to the second fixed seat 211a through the movable second joint bearing 214a, and the other end is rotatably connected to the second adapter 213a through the movable second joint bearing 214a. On the one hand, the second joint bearing 214a can support the load and reduce the influence of the gravity of the second loading member 212a on the radial loading. On the other hand, it can be more convenient to control the loading force of the second loading member 212a to be output along the axial direction X, thereby improving the consistency of the axial loading and the axis and the effectiveness of the test load.

[0082] In summary, the test bench 10 in the embodiment of the present application can not only simulate the working conditions of the bearing to be tested under conventional static loads, but also simulate the working conditions of the bearing to be tested under dynamic loading such as start-stop, fatigue, idling, low-frequency operation, extreme load, emergency stop, etc., and can ensure the dynamic load accuracy of the test process and the controllability of the process, so as to comprehensively evaluate the performance of the bearing to be tested in the actual environment and improve the accuracy of the test results.

[0083] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A test bench for a shaft system (20) of a wind turbine generator set, the shaft system (20) comprising a main shaft, a bearing seat and a bearing to be tested arranged between the main shaft and the bearing seat, characterized in that: The test bench (10) comprises: A base (1) for fixing the bearing seat; A loading mechanism (2) comprising a plurality of loading devices (21), wherein the plurality of loading devices (21) are connected to the main shaft and respectively apply radial loads and axial loads to the main shaft; A buffer member (3) is arranged on a loading path of at least one of the loading devices (21); A first monitoring component (4) is disposed on the buffer component (3) and is configured to monitor the value of the load.

2. The test bench according to claim 1, characterized in that: The loading device (21) comprises a fixed seat (211), a loading component (212) and an adapter (213); the adapter (213) is used to be connected to the main shaft; the loading component (212) is supported on the fixed seat (211); the loading component (212) is connected to the adapter (213) via the buffer component (3) and applies a load to the adapter (213).

3. The test bench according to claim 2, characterized in that: The buffer member (3) comprises a first shell, a second shell and an elastic deformation member; One of the first shell and the second shell is connected to the adapter (213), and the other is connected to the loading member (212); the first shell and the second shell define a buffer space; the elastic deformation member and the first monitoring member (4) are located in the buffer space; and the elastic deformation direction of the elastic deformation member is the same as the extension direction of the loading path.

4. The test bench according to claim 2, characterized in that: The plurality of loading devices (21) include radial loading devices (21b) and axial loading devices (21a), and the buffer (3) is at least arranged on the loading path of the axial loading device (21a).

5. The test bench according to claim 4, characterized in that: The axial loading device (21a) and the radial loading device (21b) are respectively located on both sides of the base (1) along the axial direction (X), and the adapters (213) of the axial loading device (21a) and the radial loading device (21b) are respectively connected to two ends of the main shaft; And / or, the axial loading device (21a) and the radial loading device (21b) are located on the same side of the base (1) along the axial direction (X), and the adapter (213) of the axial loading device (21a) is connected to the adapter (213) of the radial loading device (21b).

6. The test bench according to claim 4, characterized in that: In the radial loading device (21b), the adapter (213) includes a loading arm (2131b) and a radial loading bearing (2132b), the loading arm (2131b) includes a connecting end and a loading end which are arranged opposite to each other along the axial direction (X), the connecting end is used to be connected to the main shaft, the radial loading bearing (2132b) is arranged at the loading end of the loading arm (2131b), and the loading member (212) is connected to the radial loading bearing (2132b) and applies a radial load to the radial loading bearing (2132b).

7. The test bench according to claim 6, characterized in that: In the axial loading device (21a), the adapter (213) comprises an axial loading bearing (2131a) and a main body (2132a) connected to one side of the axial loading bearing (2131a), the axial loading bearing (2131a) is arranged at the loading end of the main shaft and / or the loading arm (2131b), and the loading member (212) is connected to the main body (2132a) through the buffer member (3) and applies an axial load to the main body (2132a).

8. The test bench according to claim 6, characterized in that: The length of the loading arm (2131b) along the axial direction (X) is adjustable.

9. The test bench according to claim 8, characterized in that: The loading arm (2131b) comprises a plurality of loading segments arranged along the axial direction (X), and two adjacent loading segments are detachably connected.

10. The test bench according to claim 2, characterized in that: The loading device (21) further comprises a joint bearing (214), wherein the joint bearing (214) is arranged on the fixing seat (211), and the loading member (212) is rotatably connected to the fixing seat (211) via the joint bearing (214), and / or the joint bearing (214) is arranged on the adapter (213), and the buffer member (3) is rotatably connected to the adapter (213) via the joint bearing (214).

11. The test bench according to claim 1, characterized in that: The test bench (10) further comprises: A driving device (5) is arranged on one side of the base (1) along the axial direction (X), and an output end of the driving device (5) is used to be connected to the main shaft and drive the main shaft to rotate around the axial direction (X); The second monitoring component (6) is connected to the driving device (5) and is used to monitor the output torque of the driving device (5).

12. The test bench according to claim 11, characterized in that: The driving device (5) comprises a driving member (51), a coupling (52) and a reducer (53); the coupling (52) is connected to the output end of the driving member (51) and the reducer (53); and the second monitoring member (6) is arranged on the coupling (52).

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