Test board, test system and test method of wind turbine generator

Abstract

The invention relates to a test bench, a test system and a test method of a wind turbine generator, the test bench is used for a shaft system of the wind turbine generator, the shaft system 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 first loading device and a second loading device, and the base is used for fixing the bearing seat. The first loading device is used for being connected with a main shaft and can apply loading force to the main shaft in the first direction, the second loading device comprises a loading arm and a second loading piece, the loading arm is provided with a connecting end and a loading end which are oppositely arranged in the first direction, the connecting end is used for being connected with the main shaft, and the second loading piece is connected to the loading end. A loading force along a second direction can be applied to the loading end, and the second direction intersects with the first direction. According to the test board, the test system and the test method of the wind turbine generator, the actual shafting load can be simulated, the state of the tested bearing can be directly reflected, and the test result is more accurate.

Description

Technical Field

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

[0002] The rotation of the impeller of the wind turbine generator set drives the generator inside the nacelle to work, thereby realizing wind power generation. The force exerted on the impeller in the air is transmitted to the generator through the shaft system. In order to ensure that the selected shaft system meets the operating requirements of the wind turbine generator, the shaft system of the wind turbine generator set needs to be subjected to a simulated loading test on the test bench to detect the ability of the wind turbine generator set shaft system to withstand loads.

[0003] Among them, the existing tests often directly install the bearing to be tested on a test bench for loading test. However, the bearing state measured in the test cannot truly reflect the state of the bearing to be tested in the actual wind turbine generator set, and the reliability is poor. Summary of the invention

[0004] The present application provides a test bench, a test system and a test method for a wind turbine generator set, which can simulate the actual shaft system load and directly reflect the state of the tested bearing, and the test results are more accurate.

[0005] On the one hand, according to an embodiment of the present application, a test bench is proposed for a shaft system of a wind turbine generator set, the shaft system including a main shaft, a bearing seat and a bearing to be tested arranged between the main shaft and the bearing seat, the test bench including: a base for fixing the bearing seat; a first loading device, the first loading device is used to connect the main shaft and can apply a loading force to the main shaft along a first direction; a second loading device, including a loading arm and a second loading member, the loading arm having a connecting end and a loading end relatively arranged along the first direction, the connecting end being used to connect the main shaft, the second loading member being connected to the loading end and can apply a loading force to the loading end along a second direction, the second direction intersecting with the first direction.

[0006] According to one aspect of an embodiment of the present application, the first loading device includes a support member and a first loading member, the support member extends along the second direction and has a loading surface perpendicular to the first direction, one end of the first loading member abuts against the support surface, and the other end extends along the first direction toward the base, and is used to apply a loading force along the first direction to the main shaft.

[0007] According to one aspect of the embodiment of the present application, the first loading device and the second loading device are respectively arranged on both sides of the base in the first direction, and are respectively used to be connected to the two ends of the main shaft.

[0008] According to one aspect of the embodiment of the present application, the first loading member is fixed on the supporting surface, and the size of the supporting member along the second direction is adjustable.

[0009] According to one aspect of an embodiment of the present application, the first loading device and the second loading device are both arranged on the same side of the base in the first direction, the first loading device is connected to the loading end of the loading arm, and applies a loading force along the first direction to the loading end.

[0010] According to one aspect of the embodiment of the present application, one end of the first loading member is supported on the supporting surface and can move freely along the second direction relative to the supporting surface, and the other end is connected to the loading arm.

[0011] According to one aspect of an embodiment of the present application, it also includes a driving device, which is arranged on one side of the base along the first direction, and the output end of the driving device is used to connect to the main shaft and drive the main shaft to rotate around the first direction.

[0012] According to one aspect of an embodiment of the present application, it also includes a first adapter, which is arranged at one end of the first loading device and / or the second loading device toward the base along the first direction, and the first loading device and / or the second loading device is rotatably connected to the main shaft through the first adapter.

[0013] According to one aspect of an embodiment of the present application, the second loading device is directly connected to the main shaft, and the second loading device also includes a second adapter, which is rotatably connected to the loading end of the loading arm. The second loading member is connected to the second adapter and applies a loading force along the second direction to the second adapter.

[0014] According to one aspect of the embodiment of the present application, the second loading device further comprises a joint bearing, which is arranged at an end of the second loading member away from the loading arm, and the second loading member can be freely rotatable around the joint bearing.

[0015] On the other hand, according to an embodiment of the present application, a test system is proposed, including: a test bench as in the above embodiment; and a collection device configured to collect status information of a bearing to be tested of a shaft system under a predetermined load.

[0016] According to one aspect of an embodiment of the present application, the acquisition device includes a vibration sensor and / or a temperature sensor, the vibration sensor is used to acquire vibration information of the bearing to be tested, and the temperature sensor is used to acquire temperature information of the bearing to be tested.

[0017] On the other hand, according to an embodiment of the present application, a testing method for a wind turbine is proposed, which is characterized in that it includes: an installation step, providing a testing system of the above embodiment, fixing the bearing seat of the wind turbine shaft system on the base of the test bench, and connecting the first loading device and the second loading device to the main shaft of the wind turbine shaft system; a testing step, applying a loading force along a first direction to the main shaft through the first loading device, and applying a loading force along a second direction to the main shaft through the second loading device, and collecting state information of the bearing to be tested of the wind turbine shaft system under a predetermined load.

[0018] According to one aspect of an embodiment of the present application, in the installation step, the test system also includes a driving device, which connects the driving device to the main shaft; the testing step also includes: driving the main shaft to rotate around a first direction by the driving device, and collecting state information of the bearing to be tested of the wind turbine shaft system under a predetermined speed and a predetermined load.

[0019] According to one aspect of an embodiment of the present application, in the test step: the predetermined load includes an equivalent load under normal power generation conditions and a load under special conditions, and the equivalent load under normal power generation conditions and the load under special conditions are applied alternately according to a predetermined time.

[0020] The test bench, test system and test method of a wind turbine generator set provided in the embodiment of the present application include a base, a first loading device and a second loading device. The test bench is used for the shaft system of the wind turbine generator set. The bearing seat of the shaft system is fixed on the base. The first loading device and the second loading device are used to load the main shaft of the shaft system. The main shaft can transmit the loading force to the bearing to be tested to achieve the performance test of the bearing to be tested. Therefore, the test bench uses the shaft system of the assembled wind turbine generator set as the test object, so as to simulate the actual load on the shaft system of the wind turbine generator set. The test result can directly reflect the state of the bearing to be tested, and the test result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of a test bench according to an embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of a test bench of another embodiment of the present application;

[0024] Figure 3 It is a flow chart of a method for testing a wind turbine generator set according to an embodiment of the present application.

[0025] In the attached figure:

[0026] 10-test bench; 20-shaft system; 210-spindle; 220-bearing seat; 230-bearing to be tested;

[0027] 1-base; 2-first loading device; 21-support member; 22-first loading member; 3-second loading device; 31-loading arm; 32-second loading member; 33-second adapter; 4-driving device; 41-driving member; 42-reducer; 43-coupling; 5-first adapter;

[0028] X-first direction; Z-second 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 figures, and do not limit the test bench, test system and test method of wind turbine generator set 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] Most of the existing wind turbine test benches test bearings separately. Specifically, the test bench is provided with a main shaft and a bearing seat. When testing the bearing, the inner ring of the bearing to be tested is connected to the main shaft of the test bench, and the outer ring of the bearing to be tested is connected to the bearing seat of the test bench to install the bearing to be tested, and the actual load condition of the bearing to be tested during the operation of the wind turbine is simulated by loading the bearing to be tested.

[0033] After research, the applicant found that, firstly, the force on the bearing to be tested is related to the stiffness of the bearing seat and the preload of the bearing to be tested, so the boundary of the bearing to be tested obtained by the test does not match the load-bearing capacity of the bearing to be tested in the actual wind turbine. Secondly, the types of bearings to be tested that can be tested by the wind turbine test bench are limited, and they are often small bearings. Small bearings can verify the materials and processes of large bearings, but cannot equivalently verify the failure of bearings. Furthermore, the shaft system of a wind turbine is often equipped with double bearings, and the bearing combinations in the shaft system are different, and there are also deviations in the load-bearing of different bearings in the same shaft system. Therefore, the bearing state measured by testing the bearing alone cannot truly reflect the state of the bearing to be tested in the actual wind turbine, and the reliability is poor.

[0034] In order to solve the above problems, the embodiments of the present application provide a test bench, a test system and a test method for a wind turbine generator set. The test bench can directly use the shaft system of the wind turbine generator set as the test object to directly reflect the performance of the tested bearing in the wind turbine generator set.

[0035] See also Figure 1 and Figure 2 According to an embodiment of the present application, a test bench 10 is proposed, which is used for a shaft system 20 of a wind turbine generator set. The shaft system 20 includes a main shaft 210, a bearing seat 220, and a bearing 230 to be tested arranged between the main shaft 210 and the bearing seat 220. The test bench 10 includes a base 1, a first loading device 2, and a second loading device 3. The base 1 is used to fix the bearing seat 220. The first loading device 2 is used to connect the main shaft 210 and can apply a loading force along a first direction X to the main shaft 210. The second loading device 3 includes a loading arm 31 and a second loading member 32. The loading arm 31 has a connecting end and a loading end that are relatively arranged along the first direction X. The connecting end is used to connect the main shaft 210. The second loading member 32 is connected to the loading end and can apply a loading force along a second direction Z to the loading end. The second direction Z intersects with the first direction X.

[0036] The test bench 10, the test system and the test method of the wind turbine generator set provided in the embodiment of the present application, the test bench 10 comprises a base 1, a first loading device 2 and a second loading device 3, the test bench 10 is used for the shaft system 20 of the wind turbine generator set, the bearing seat 220 of the shaft system 20 is fixed on the base 1, the first loading device 2 and the second loading device 3 are used to load the main shaft 210 of the shaft system 20, and the main shaft 210 can transmit the loading force to the bearing 230 to be tested, so as to realize the performance test of the bearing 230 to be tested. Therefore, the test bench 10 uses the shaft system 20 of the assembled wind turbine generator set as the test object, so as to simulate the load of the shaft system 20 of the actual wind turbine generator set, and the test result can directly reflect the state of the tested bearing, and the test result is more accurate.

[0037] It can be understood that the first direction X can be set to the axial direction, and the second direction Z can be set to the radial direction, so the first loading device 2 can apply an axial force to the main shaft 210, and the second loading device 3 can apply a bending moment to the main shaft 210 through the loading arm 31, thereby realizing the axial force and bending moment 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 axial force and bending moment are loaded by the first loading device 2 and the second loading device 3 respectively, the axial force loading and the bending moment 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.

[0038] For the sake of simplicity, the following description is given by taking the loading force in the first direction X as the axial force and the loading force in the second direction Z as the radial force as an example.

[0039] Regarding the base 1, since the base 1 is the most important load-bearing component for fixing the shaft system 20, the base 1 can be fixed on the foundation. In addition, the base 1 can also be provided with feet to ensure the stability of the test bench 10 by increasing the contact area between the feet and the ground.

[0040] Optionally, the base 1 is provided with a bearing surface matched with the bearing seat 220, and a connecting portion may be provided on the base 1, so that the shaft system 20 of the wind turbine can be detachably connected to the base 1 through the connecting portion. The connecting portion may be provided as a bolt, the number of the connecting portions may be provided as more than two, and the connecting portions may be provided at intervals along the first direction X, so as to improve the connection strength between the base 1 and the bearing seat 220.

[0041] With respect to the first loading device 2 and the second loading device 3 , since the first loading device 2 and the second loading device 3 are main loading components of the wind turbine shaft system 20 , the first loading device 2 and the second loading device 3 need to ensure that they can be reliably loaded onto the main shaft 210 .

[0042] In some optional embodiments, the first loading device 2 includes a support member 21 and a first loading member 22, the support member 21 extends along the second direction Z and has a supporting surface perpendicular to the first direction X, one end of the first loading member 22 abuts against the supporting surface, and the other end extends toward the base 1.

[0043] By dividing the first loading device 2 into a support member 21 and a first loading member 22, when an axial force is applied to the main shaft 210 by the first loading member 22, the support member 21 can be used to provide axial force support, thereby ensuring that the first loading member 22 can reliably apply the axial force to the main shaft 210.

[0044] Optionally, the first loading member 22 and the second loading member 32 may be configured as hydraulic cylinders. When the first loading member 22 is configured as a hydraulic cylinder, its piston rod is configured to reciprocate along the first direction X to apply a force along the first direction X to the spindle 210. When the second loading member 32 is a hydraulic cylinder, its piston rod is configured to reciprocate along the second direction Z to apply a force along the second direction Z to the loading end of the loading arm 31.

[0045] See also Figure 1 Considering that both the first loading device 2 and the second loading device 3 need to apply loading force to the main shaft 210, in some optional embodiments, the first loading device 2 and the second loading device 3 are respectively arranged on both sides of the base 1 in the first direction X, and are respectively used to be connected to the two ends of the main shaft 210.

[0046] By respectively arranging the first loading device 2 and the second loading device 3 on both sides of the base 1 in the first direction X, it is easier to arrange the first loading device 2 and the second loading device 3. In addition, the first loading device 2 can directly apply an axial force to the main shaft 210, and the second loading device 3 can directly apply a bending moment to the main shaft 210. By making the loading force act directly on the main shaft 210, the force transmission loss can be reduced, thereby improving the reliability of the loading of the shaft system 20.

[0047] Optionally, when the first loading device 2 and the second loading device 3 are respectively arranged on both sides of the base 1 in the first direction X, the first loading member 22 is fixed on the supporting surface, and the size of the supporting member 21 along the second direction Z is adjustable.

[0048] Since the loading arm 31 can adjust its position along the second direction Z according to the second loading member 32, by making the size of the support member 21 along the second direction Z adjustable, the first loading member 22 can be located at the same height as the loading arm 31 along the second direction Z, so that the first loading device 2 and the second loading device 3 can be respectively connected to the two ends of the shaft system 20 along the first direction X, thereby ensuring the reliability of the loading force transmission. In addition, by adjusting the position of the first loading member 22 and the support arm along the second direction Z, the shaft system 20 of different models of wind turbines can be adapted to improve the applicability of the test bench 10.

[0049] See also Figure 2 In some other optional embodiments, in the first direction X, the first loading device 2 and the second loading device 3 are both arranged on the same side of the base 1, the first loading device 2 is connected to the loading end of the loading arm 31, and applies a loading force along the first direction X to the loading end.

[0050] That is, the first loading device 2 and the second loading device 3 can also be arranged on the same side of the base 1 in the first direction X. In this case, the first loading device 2 can be arranged on the side of the second loading device 3 away from the wind turbine shaft system 20. The first loading device 2 can apply an axial force to the loading arm 31, and then transmit the axial force to the main shaft 210 through the loading arm 31, thereby realizing the axial force and bending moment loading of the wind turbine shaft system 20.

[0051] In some optional embodiments, when the first loading device 2 and the second loading device 3 are arranged on the same side of the base 1 in the first direction X, one end of the first loading member 22 is supported on the support surface and can freely move relative to the support surface along the second direction Z, and the other end is connected to the loading arm 31. Since when the second loading member 32 applies radial force to the loading end of the loading arm 31, the first loading member 22 moves along the second direction Z with the loading end of the loading arm 31, so by making the first loading member 22 freely move relative to the support surface along the second direction Z, the first loading member 22 can also adjust its position on the support surface during the process of the second loading member 32 applying radial force to the loading arm 31, so as to reduce the risk of deformation of the first loading member 22, and at the same time, the first loading member 22 can more reliably apply axial force to the spindle 210.

[0052] Optionally, a roller is provided at one end of the first loading member 22 facing the support surface, that is, the first loading member 22 abuts against the support surface through the roller, thereby reducing the friction between the first loading member 22 and the support member 21 and reducing the influence of the radial force applied to the second loading member 32.

[0053] It should be noted that the first loading device 2 and the second loading device 3 can both be arranged on the base 1, but considering that the loading arm 31 has a preset length, if the first loading device 2 and the second loading device 3 are both arranged on the base 1, the volume of the base 1 is relatively large. Therefore, at least one of the first loading device 2 and the second loading device 3 can be arranged separately from the base 1, for example, the support member 21 can be fixed on the foundation, and / or the second loading member 32 can be fixed on the foundation, so as to reduce weight and save costs.

[0054] See also Figure 1 and Figure 2 In the actual operation of the wind turbine generator set, in addition to being subjected to axial force and bending moment, the shaft system 20 of the wind turbine generator set will also rotate its main shaft 210 driven by the impeller. Therefore, in some optional embodiments, the test bench 10 also includes a driving device 4, which is arranged on one side of the base 1 along the first direction X. The output end of the driving device 4 is used to be connected to the main shaft 210 and can drive the main shaft 210 to rotate around the first direction X.

[0055] By providing the driving device 4 to drive the main shaft 210 to rotate around the first direction X, the test conditions of the shaft system 20 of the wind turbine generator set can be made consistent with the actual state, thereby more accurately reflecting the state of the tested bearing and improving the accuracy of the test.

[0056] Specifically, the driving device 4 includes a driving member 41, a reducer 42 and a coupling 43. The driving member 41 is connected to the reducer 42, and the output end of the reducer 42 is configured to be fixedly connected to the main shaft 210 through the coupling 43. The driving member 41 can be set as a driving motor, that is, the driving motor is connected to the main shaft 210 of the wind turbine shaft system 20 through the reducer 42 and the coupling 43, thereby driving the main shaft 210 to rotate at a predetermined speed.

[0057] Among them, during the design, the driving member 41 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 42 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 41 to ensure that the wind turbine shaft system 20 can rotate at a predetermined speed under the drive of the driving device 4.

[0058] See also Figure 1 and Figure 2 Since the first loading device 2 and the second loading device 3 are also connected to the main shaft 210, in some optional embodiments, the test bench 10 also includes a first adapter 5, and the first adapter 5 is arranged at one end of the first loading device 2 and / or the second loading device 3 toward the base 1 along the first direction X. The first loading device 2 and / or the second loading device 3 are rotatably connected to the main shaft 210 through the first adapter 5 to ensure stable loading of the first loading device 2 and the second loading device 3 under the condition of rotation of the main shaft 210.

[0059] Optionally, the first adapter 5 can be configured as a thrust bearing, the fixed ring of the thrust bearing is connected to the first loading device 2 and / or the second loading device 3, and the moving ring is connected to the main shaft 210, so as to realize the rotational connection between the loading device and the main shaft 210. In addition, the first adapter 5 can also be configured as a coaxially arranged inner shaft, an outer shaft, and a three-row cylindrical roller bearing arranged between the inner shaft and the outer shaft, the inner shaft is connected to the loading device, the outer shaft is connected to the main shaft 210, the inner and outer rings of the three-row cylindrical roller bearings are respectively connected to the inner shaft and the outer shaft, and are positioned and fixed to each other through shaft shoulders, so that the loading device can transmit force through the shaft shoulders and apply the loading force to the main shaft 210.

[0060] It can be understood that the first loading device 2 and / or the second loading device 3 are rotatably connected to the main shaft 210 via the first adapter 5, which includes the situation where both the first loading device 2 and the second loading device 3 are rotatably connected to the main shaft 210 via the first adapter 5, and also includes the situation where one of the first loading device 2 and the second loading device 3 is rotatably connected to the main shaft 210 via the first adapter 5 and the other is fixedly connected to the main shaft 210.

[0061] See also Figure 1In some optional embodiments, the second loading device 3 is directly connected to the main shaft 210, and the second loading device 3 also includes a second adapter 33, the second adapter 33 is rotatably connected to the loading end of the loading arm 31, and the second loading member 32 is connected to the second adapter 33 and applies a loading force along the second direction Z to the second adapter 33.

[0062] When the second loading device 3 is fixedly connected to the main shaft 210, that is, the connecting end of the loading arm 31 can be connected to the main shaft 210 through a flange structure, etc., the loading arm 31 will be rotated synchronously with the main shaft 210. Therefore, at this time, a second adapter 33 can be set at the loading end of the loading arm 31, so that the second loading component 32 can be rotatably connected to the loading end of the loading arm 31 through the second adapter 33, so as to realize stable loading of the loading arm 31 by the second loading component 32.

[0063] Taking into account that the loading arm 31 may have a certain degree of deflection and horizontal shaking during its rotation, the second adapter 33 can be set as a spherical roller bearing, the inner ring of the spherical roller bearing can be connected to the loading end of the loading arm 31, and the second loading member 32 acts on the outer ring of the spherical roller bearing, so that the second loading device 3 can provide the required radial force while also providing angle adjustment to eliminate the horizontal shaking of the loading arm 31.

[0064] In some optional embodiments, the second loading device 3 further includes a joint bearing, which is arranged at one end of the second loading member 32 away from the loading arm 31, and the second loading member 32 can be freely rotated around the joint bearing. By arranging the joint bearing at one end of the second loading member 32 away from the loading arm 31, the second loading member 32 can be fixed on the foundation through the joint bearing, thereby further eliminating the horizontal shaking of the loading arm 31 and ensuring the reliability of the loading of the second loading device 3.

[0065] It can be understood that the specific connection method between the first loading device 2 and the second loading device 3 and the main shaft 210 is related to the setting position of the first loading device 2 and the second loading device 3 relative to the wind turbine bearing, and the specific connection method can be adjusted according to the actual needs of the test bench 10, and this application does not make any specific limitations on this.

[0066] The embodiment of the present application further proposes a test system, including a test bench 10, a collection device and a monitoring device, wherein the collection device is configured to collect state information of a bearing 230 to be tested of a shaft system 20 of a wind turbine generator system under a predetermined load.

[0067] The test system in the embodiment of the present application includes the test bench 10 in the above embodiment, so it has the technical effect of the technical solution of the test bench 10 in any of the above embodiments, and the explanation of the structure and terminology that are the same or corresponding to the above embodiment will not be repeated here.

[0068] Since the test system is integrated with a collection device and a monitoring device in addition to the test bench 10, it can collect the status information of the tested bearing in real time while applying axial force and bending moment to the shaft system 20 of the wind turbine through the test bench 10, so as to monitor the status of the tested bearing 230 in real time.

[0069] In some optional embodiments, the acquisition device includes a vibration sensor and / or a temperature sensor, the vibration sensor is used to collect vibration information to be measured, and the temperature sensor is used to collect temperature information of the bearing 230 to be measured. Specifically, when the shaft system 20 of the wind turbine generator includes a double bearing, the vibration sensor can be installed at the position of the front and rear bearings of the shaft system 20, and the temperature sensor can be installed at the temperature measuring hole of the shaft system 20 to test the temperature of the inner ring of the bearing 230 to be measured and the temperature field on the surface of the shaft system 20, so as to intuitively judge the state of the bearing 230 to be measured.

[0070] See also Figure 3 The embodiment of the present application also proposes a method for testing a shaft system 20 of a wind turbine generator set, including:

[0071] Installation step, providing the test system of the above embodiment, fixing the bearing seat 220 of the wind turbine shaft system 20 on the base 1 of the test bench 10, and connecting the first loading device 2 and the second loading device 3 to the main shaft 210 of the wind turbine shaft system 20;

[0072] The test steps include applying a loading force along a first direction X to the main shaft 210 through the first loading device 2, and applying a loading force along a second direction Z to the main shaft 210 through the second loading device 3, and collecting the state information of the bearing 230 to be tested of the wind turbine shaft system 20 under a predetermined load.

[0073] The first loading device 2 and the second loading device 3 are used to load the main shaft 210 of the shaft system 20, and the main shaft 210 can transmit the loading force to the bearing 230 to be tested, so as to achieve the performance test of the bearing 230 to be tested. The first loading device 2 and the second loading device 3 can load the main shaft 210 synchronously to simulate the main load of the shaft system 20 in the wind turbine in the wind farm.

[0074] In some optional embodiments, in the installation step, the test system also includes a drive device 4, which connects the drive device 4 to the main shaft 210, and the test step also includes: driving the main shaft 210 to rotate around the first direction X through the drive device 4, and collecting state information of the bearing 230 to be tested of the wind turbine shaft system 20 under a predetermined speed and a predetermined load.

[0075] The driving device 4 can be provided to drive the main shaft 210 to rotate around the first direction X, so that the test conditions of the shaft system 20 of the wind turbine generator set are consistent with the actual state, thereby more accurately reflecting the state of the tested bearing and improving the accuracy of the test of the tested bearing 230.

[0076] To further simulate the operating state of the bearing 230 to be tested, in some optional embodiments, in the test step: the predetermined load includes an equivalent load under normal power generation conditions and a load under special conditions, and the equivalent load under normal power generation conditions and the load under special conditions are applied alternately at a predetermined time.

[0077] It can be understood that special operating conditions include starting and stopping, fatigue, idling and emergency stop of the wind turbine shaft system 20. By distributing the special operating condition load equivalent to the special operating condition evenly according to the equivalent time according to the operating time of each robust operating condition, the equivalent load of the normal power generation condition and the special operating condition load are applied alternately according to the predetermined time, which can be closer to the actual operating state of the wind turbine, thereby further improving the accuracy of the test of the bearing 230 to be tested.

[0078] 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 (10) for a shaft system (20) of a wind turbine generator set, the shaft system (20) comprising a main shaft (210), a bearing seat (220) and a bearing to be tested (230) arranged between the main shaft (210) and the bearing seat (220), characterized in that: The test bench (10) comprises: A base (1) for fixing the bearing seat (220); A first loading device (2), the first loading device (2) being used to connect to the main shaft (210) and capable of applying a loading force along a first direction to the main shaft (210); The second loading device (3) comprises a loading arm (31) and a second loading member (32), wherein the loading arm (31) has a connecting end and a loading end arranged opposite to each other along the first direction, the connecting end being used to connect to the main shaft (210), and the second loading member (32) being connected to the loading end and capable of applying a loading force along a second direction to the loading end, wherein the second direction intersects with the first direction.

2. The test bench (10) according to claim 1, characterized in that The first loading device (2) comprises a support member (21) and a first loading member (22); the support member (21) is extended along the second direction and has a loading surface perpendicular to the first direction; one end of the first loading member (22) abuts against the support surface, and the other end extends along the first direction toward the base (1), and is used to apply a loading force along the first direction to the main shaft (210).

3. The test bench (10) according to claim 2, characterized in that The first loading device (2) and the second loading device (3) are respectively arranged on both sides of the base (1) in the first direction, and are respectively used to be connected to both ends of the main shaft (210).

4. The test bench (10) according to claim 3, characterized in that The first loading member (22) is fixed on the supporting surface, and the size of the supporting member (21) along the second direction is adjustable.

5. The test bench (10) according to claim 2, characterized in that The first loading device (2) and the second loading device (3) are both arranged on the same side of the base (1) in the first direction; the first loading device (2) is connected to the loading end of the loading arm (31) and applies a loading force along the first direction to the loading end.

6. The test bench (10) according to claim 5, characterized in that One end of the first loading member (22) is supported on the supporting surface and can freely move relative to the supporting surface along the second direction, and the other end is connected to the loading arm (31).

7. The test bench (10) according to claim 1, characterized in that It also comprises a driving device (4), wherein the driving device (4) is arranged on one side of the base (1) along the first direction, and an output end of the driving device (4) is used to be connected to the main shaft (210) and drive the main shaft (210) to rotate around the first direction.

8. The test bench (10) according to claim 1 or 2, characterized in that: The invention also comprises a first adapter (5), wherein the first adapter (5) is arranged at one end of the first loading device (2) and / or the second loading device (3) along the first direction toward the base (1), and the first loading device (2) and / or the second loading device (3) are rotatably connected to the main shaft (210) via the first adapter (5).

9. The test bench (10) according to claim 1 or 2, characterized in that: The second loading device (3) is directly connected to the main shaft (210), and the second loading device (3) also includes a second adapter (33), the second adapter (33) is rotatably connected to the loading end of the loading arm (31), and the second loading member (32) is connected to the second adapter (33) and applies a loading force along the second direction to the second adapter (33).

10. The test bench (10) according to claim 9, characterized in that The second loading device (3) further comprises a joint bearing, which is arranged at one end of the second loading member (32) away from the loading arm (31), and the second loading member (32) can be freely rotatable around the joint bearing.

11. A testing system, characterized in that: include: A test bench (10) as claimed in any one of claims 1 to 10; The collecting device is configured to collect status information of a bearing (230) to be tested of a shaft system (20) under a predetermined load.

12. The test system according to claim 11, characterized in that: The acquisition device comprises a vibration sensor and / or a temperature sensor, wherein the vibration sensor is used to acquire vibration information of the bearing to be tested (230), and the temperature sensor is used to acquire temperature information of the bearing to be tested (230).

13. A method for testing a wind turbine generator set, characterized in that: include: An installation step, providing a test system as claimed in claim 11 or 12, fixing a bearing seat (220) of a wind turbine shaft system (20) on a base (1) of the test bench (10), and connecting the first loading device (2) and the second loading device (3) to a main shaft (210) of the wind turbine shaft system (20); A test step, applying a loading force along a first direction to the main shaft (210) by means of the first loading device (2), and applying a loading force along a second direction to the main shaft (210) by means of the second loading device (3), and collecting state information of a bearing (230) to be tested of the shaft system (20) of the wind turbine generator set under a predetermined load.

14. The wind turbine testing method according to claim 13, characterized in that: In the installation step, the test system further comprises a driving device (4), and the driving device (4) is connected to the main shaft (210); The test step also includes: driving the main shaft (210) to rotate around the first direction by the drive device (4), and collecting state information of the bearing (230) to be tested of the wind turbine shaft system (20) at a predetermined speed and a predetermined load.

15. The wind turbine testing method according to claim 13, characterized in that: In the test steps: The predetermined load includes a normal power generation condition equivalent load and a special condition load, and the normal power generation condition equivalent load and the special condition load are applied alternately according to a predetermined time.

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