Train bearing test apparatus

Abstract

The application provides a train bearing test device, which comprises an axle box, a first load applying device and a driving device. The axle box is used for mounting a bearing to be tested, the bearing is sleeved on an axle shaft, and the axle shaft and the bearing are located in the axle box. The first load applying device comprises a plurality of load output ends, which are used for contacting the bearing and applying a plurality of lateral loads to the bearing, at least two of which are different in size. The driving device is connected with the axle shaft and is used for driving the axle shaft to rotate. The device accurately simulates the bearing working condition of train running and running to a small radius curve by applying lateral eccentric load to the bearing through the first load applying device, accurately tests the performance of the train bearing, and provides reliable data support for the design and production of the train bearing.

Description

Technical Field

[0001] This invention relates to the field of bearing testing technology, and in particular to a test device for train bearings. Background Technology

[0002] With the development of rail transit technology, train operating speeds are constantly increasing, placing more stringent demands on vehicle operation safety. Train bearings are core components ensuring high-speed train operation, and improving bearing performance and quality is a key focus in rail vehicle design.

[0003] To improve train safety and prevent accidents caused by bearing damage, comprehensive performance testing of train bearings is required before installation. By analyzing bearing test data, design defects can be identified in a timely manner, providing effective test data support for bearing performance improvement.

[0004] Currently, the simulated operating conditions of bearing testing devices deviate significantly from actual operating conditions, resulting in low accuracy of test data and an inability to provide reliable data support for the design, production, and maintenance of train bearings. Summary of the Invention

[0005] This invention provides a train bearing testing device to solve the problem of low bearing testing accuracy in the prior art.

[0006] This invention provides a train bearing testing device, comprising:

[0007] An axle box is used to mount a bearing to be tested, the bearing is sleeved on an axle, and the axle and the bearing are located inside the axle box;

[0008] A first load application device includes multiple load output ends, which are used to contact the bearing and apply multiple lateral loads to the bearing, wherein at least two of the multiple lateral loads are of different magnitudes.

[0009] A drive device is connected to the axle and is used to drive the axle to rotate.

[0010] According to the present invention, a train bearing testing device is provided, wherein the first load application device comprises:

[0011] A bracket is fitted onto the axle, and the plurality of load output ends are arranged circumferentially around the axle on the bracket.

[0012] According to the present invention, a train bearing testing device includes a first load application device comprising:

[0013] A first loading device, the first loading device being used to output load;

[0014] A connecting rod, which connects the first loading device and the bracket.

[0015] The train bearing testing equipment provided by the present invention further includes:

[0016] A vibration damping device is connected to the axle box and is used to provide vertical elastic support force for the bearing.

[0017] According to the present invention, a train bearing testing device includes a vibration damping device comprising:

[0018] Platform, wherein the axle box is fixed to the first plane of the platform;

[0019] An elastic element is connected to a second plane of the platform, and the first plane and the second plane are arranged opposite to each other.

[0020] The train bearing testing equipment provided by the present invention further includes:

[0021] An insulating shell defines a receiving cavity, and the axle box is located within the receiving cavity;

[0022] A temperature control device is provided on the insulation shell and is used to regulate the temperature inside the receiving cavity.

[0023] According to a train bearing testing device provided by the present invention, the temperature control device includes a temperature control component and a gas circulation component;

[0024] The heat-insulating shell is provided with an airflow port, and the gas circulation assembly delivers airflow to the receiving cavity through the airflow port. The temperature control assembly is used to adjust the temperature of the airflow.

[0025] According to the present invention, a train bearing testing device includes a temperature control device comprising:

[0026] A first temperature control device is disposed in the heat-insulating shell and is used to increase the temperature inside the receiving cavity.

[0027] A second temperature control device is disposed in the insulation shell and is used to reduce the temperature inside the cavity.

[0028] The train bearing testing equipment provided by the present invention further includes:

[0029] A second load-applying device is used to contact the axle box and apply a downward vertical load to the axle box.

[0030] The train bearing testing equipment provided by the present invention further includes:

[0031] A third load-applying device is used to contact the axle box and intermittently apply an upward vertical load to the axle box.

[0032] The train bearing testing equipment provided by the present invention further includes:

[0033] A drive device is connected to the axle and is used to drive the axle to rotate.

[0034] The train bearing testing equipment provided by this invention applies a lateral off-center load to the bearing by setting a first load application device, accurately simulating the bearing conditions during train operation and operation on small radius curves, and accurately testing the performance of the train bearing, providing reliable data support for the design and production of train bearings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a top view of the train bearing testing equipment provided by the present invention;

[0037] Figure 2 This is a cross-sectional schematic diagram of the train bearing testing equipment provided by the present invention.

[0038] Figure label:

[0039] 110: Platform; 121: First load output end; 122: Second load output end; 123: Support; 124: Connecting rod; 125: First loading device; 130: Elastic element; 140: Insulation shell; 141: Air outlet; 151: First temperature control device; 152: Second temperature control device; 160: Second load application device; 170: Third load application device; 180: Drive device;

[0040] 210: Axle; 220: Bearing; 230: Axle box. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 the embodiments of the present invention 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 the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, a wired communication connection, or a wireless communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Train bearings are core components that ensure high-speed train operation. Improving bearing performance and quality is a key task in the design of rail vehicles.

[0047] Train bearings are not only key components supporting the weight of the train body, but also key components that convert the rotation of the motor into the translation of the rail vehicle. They bear static or dynamic loads from different directions and are easily damaged parts of the train. Approximately 30% of train rotating machinery failures are caused by bearings.

[0048] To improve train safety and prevent accidents caused by bearing damage, comprehensive performance testing of train bearings is required before installation. By analyzing bearing test data, design defects can be identified in a timely manner, providing effective test data support for bearing performance improvement.

[0049] The following is combined Figure 1 and Figure 2 This invention describes a train bearing testing device according to an embodiment of the present invention.

[0050] The train bearing testing equipment provided in this invention can accurately simulate train operating conditions, test the performance of train bearings, and provide reliable data support for the design and production of train bearings.

[0051] like Figure 1 As shown, the train bearing assembly includes an axle 210, a bearing 220, and an axle box 230. The bearing 220 is sleeved on the axle 210 and supports the axle 210. Both the bearing 220 and the axle 210 are located inside the axle box 230.

[0052] In actual operation, the train bearing assembly connects the train wheelset and the side frame or frame together, and transmits the train load to the wheelset. The axle box 230 can limit the excessive lateral movement of the wheelset, prevent rainwater, dust and other foreign objects from entering, and maintain the normal lubrication of the bearing 220.

[0053] The train bearing testing equipment provided in this embodiment of the invention includes: an axle box 230, a first load application device, and a drive device 180.

[0054] In this embodiment, the drive device 180 is connected to the axle 210, and the drive device 180 is used to drive the axle 210 to rotate.

[0055] In the train bearing assembly, bearing 220 supports wheel axle 210, reduces the coefficient of friction during the rotation of wheel axle 210, and ensures its rotational accuracy.

[0056] In this embodiment, a drive device 180 is provided, which drives the axle 210 to rotate, simulating the train operation condition where the axle 210 drives the wheels to rotate. In this embodiment, as... Figure 1 As shown, the axle box 230 is used to mount the bearing 220 to be tested.

[0057] Understandably, during train component assembly, the wheelset is installed at the bottom of the train frame via the axle box 230. When the train bearing to be tested is tested using train bearing testing equipment, the axle box 230 can be fixed in place to simulate the relatively fixed positional relationship between the axle box 230 and the wheelset in actual application.

[0058] like Figure 2 As shown, the first load application device is used to contact the bearing 220 and apply multiple lateral loads to the bearing 220, with the lateral direction being the axial direction of the wheel axle 210.

[0059] Among them, the lateral direction is the axial direction of the wheel axle 210. In the field of trains, the lateral direction refers to the width direction of the train body, which is also the axial direction of the wheel axle 210. The longitudinal direction refers to the length direction of the train body, and the vertical direction refers to the height direction of the train.

[0060] The first load application device of the train bearing test equipment is located on one side of the train bearing assembly. The first load application device applies a lateral load to the bearing 220, which simulates the load on the end face of the bearing 220 when the train is running.

[0061] In this embodiment, when the first load applying device contacts the bearing 220, it can apply one or more lateral loads to the bearing 220.

[0062] The first load application device can apply multiple lateral loads of the same magnitude to the bearing 220, which is to simulate the axial load of the wheel axle 210 on the bearing 220 during train operation.

[0063] The turning radius of a train to avoid an obstacle is called a small radius curve. It is understandable that when a train runs on a small radius curve, centrifugal force will be generated, which will affect the train's speed. As the train's wheelset rotates, the bearing 220 is subjected to an off-center load in the axial direction of the wheel axle 210.

[0064] In this embodiment, the first load application device can apply multiple lateral loads of different magnitudes to the bearing 220, thereby applying an off-center load to the bearing 220. This can accurately simulate the bearing conditions when a train is running on a curved track, enabling precise testing of the bearing 220's performance and providing reliable data support for the design and production of train bearings.

[0065] The first load application device includes multiple load output ends, which are used to apply multiple lateral loads to the bearing 220.

[0066] The load output end is the component of the first load application device that outputs the load. The first load application device includes multiple load output ends, which can output loads of the same or different sizes.

[0067] In this embodiment, at least two of the multiple lateral loads are of different magnitudes.

[0068] In this embodiment, at least two of the multiple lateral loads applied to the bearing 220 by the multiple load output terminals are of different magnitudes, that is, the first load application device applies an axial load of the axle 210 to the bearing 220.

[0069] Understandably, by adjusting the magnitude of multiple lateral loads output from multiple load output terminals, the bearing conditions when the train is running on a small radius curve can be accurately simulated, and the performance of the train bearings can be accurately tested, providing reliable data support for the design and production of train bearings.

[0070] In actual operation, the first load application device can simulate the turning conditions of the train and adjust the magnitude, quantity and position of the lateral load applied by the bearing 220 of the first load application device to obtain relevant experimental data.

[0071] According to the train bearing testing equipment provided in the embodiments of the present invention, by setting a first load application device, a lateral load is applied to the bearing 220 to accurately simulate the bearing conditions when the train is running and running to a small radius curve, so as to accurately test the performance of the train bearing and provide reliable data support for the design and production of train bearings.

[0072] In some embodiments, the first load application device includes a support 123.

[0073] The bracket 123 is fitted onto the axle 210, and multiple load output ends are arranged circumferentially around the axle 210 on the bracket 123.

[0074] In this embodiment, multiple load output ends are arranged circumferentially around the wheel shaft 210 on the bracket 123, and contact the bearing 220 at different positions to apply multiple lateral loads to the bearing 220.

[0075] In actual implementation, the multiple load output ends on the bracket 123 can be evenly distributed or unevenly distributed.

[0076] For example, the first load application device has a first load output end 121 and a second load output end 122. The first load output end 121 and the second load output end 122 are arranged opposite to each other on the bracket 123, and their contact positions with the bearing 220 are opposite to each other. They are located on the same diameter of the bearing 220. The first load output end 121 and the second load output end 122 are evenly distributed on the two halves of the same end face of the bearing 220.

[0077] The first load output terminal 121 and the second load output terminal 122 output two lateral loads of the same magnitude to the bearing 220, simulating the axial load of the wheel axle 210 on the bearing 220 during train operation.

[0078] The first load output terminal 121 and the second load output terminal 122 output two lateral loads of different sizes to the bearing 220, or when only one of the first load output terminal 121 and the second load output terminal 122 outputs a lateral load, the train is simulated to run to the small radius curve bearing 220 and be subjected to the axial load of the wheel axle 210.

[0079] For example, the first load application device has five load output ends, which are unevenly distributed on the end face of the bearing 220.

[0080] In some embodiments, the first load application device includes a first loading device 125 and a connecting rod 124.

[0081] The first loading device 125 is used to output the load, and the connecting rod 124 connects the first loading device 125 and the bracket 123.

[0082] In actual implementation, the first loading device 125 can be a hydraulic loader, a hydraulic testing machine, an electro-hydraulic servo loading system, or other loading devices.

[0083] The connecting rod 124 is a component that transmits the load output by the first loading device 125. The load output by the first loading device 125 is applied to the bearing 220 via the connecting rod 124 and the bracket 123.

[0084] It is understandable that during train operation, the wheel axle 210 and bearing 220 are linked. When the train runs on a small radius curve, the rotation of the train's wheelset will affect both the wheel axle 210 and bearing 220.

[0085] In this embodiment, by setting up the connecting rod 124 and the bracket 123, the influence of the linkage between the wheel axle 210 and the bearing 220 on the bearing 220 when the train runs on a small radius curve is accurately simulated. The lateral load applied to the bearing 220 by the first load application device is more accurate, realizing precise testing of the train bearing performance and providing more reliable data support for the design and production of train bearings.

[0086] In some embodiments, the bearing testing equipment may further include a vibration damping device.

[0087] In this embodiment, the vibration damping device is connected to the axle box 230 and is used to provide vertical elastic support force for the bearing 220.

[0088] In actual implementation, the vibration damping device includes an elastic element 130 and a platform 110.

[0089] The first plane and the second plane of the platform 110 are arranged opposite to each other. The axle box 230 is fixed to the first plane of the platform 110, and the elastic element 130 is connected to the second plane of the platform 110. That is, the axle box 230 is located above the platform 110, and the elastic element 130 is located below the platform 110.

[0090] In this embodiment, the vibration damping device is used to simulate the primary suspension between the axle box 230 and the frame of the train. The primary suspension system refers to the axle box suspension system between the wheelset and the frame, which plays the role of transmitting forces between the axle box 230 and the wheelset and positioning.

[0091] In some embodiments, the bearing testing equipment may further include a second load application device 160.

[0092] The second load application device 160 is used to contact the axle box 230 and apply a vertical load to the axle box 230.

[0093] In this embodiment, the second load application device 160 is located above the axle box 230, and the second load application device 160 can directly contact the axle box 230 to apply a downward vertical load to the axle box 230.

[0094] The second load application device 160 can simulate gravity loads caused by the self-weight of the train structure and the weight of the people and goods carried by the train.

[0095] In actual implementation, the second load application device 160 can be a hydraulic loader, a hydraulic testing machine, an electro-hydraulic servo loading system, or other loading devices.

[0096] By adjusting the magnitude of the vertical load applied by the second load application device 160, the stress conditions of train bearings under different train models and different load conditions are simulated, and the performance of train bearings is accurately tested, providing reliable data support for the design and production of train bearings and the setting of load limits for train operation.

[0097] In some embodiments, the bearing testing equipment may further include a third load application device 170.

[0098] The third load application device 170 is used to contact the axle box 230 and intermittently apply an upward vertical load to the axle box 230.

[0099] Understandably, the third load application device 170 intermittently applies an upward vertical load to the axle box 230, which can simulate the wheel-rail excitation phenomenon that is common during train operation.

[0100] Wheel-rail excitation is an excitation load generated by track irregularities, non-circular wheels, etc. Wheel-rail excitation is divided into low-frequency excitation and medium- and high-frequency excitation. Although the presence of low-frequency excitation will limit the train's speed through curves, it has little impact on the service performance of vehicle / track system components. Medium- and high-frequency excitation will seriously affect the train's running quality. The system is in a medium- and high-frequency vibration state for a long time, causing structural resonance of components and accelerating fatigue damage to components such as bearing 220 in the system.

[0101] In this embodiment, by adjusting the magnitude and frequency of the vertical load applied by the third load application device 170, a comprehensive and accurate simulation of the wheel-rail excitations existing during train operation, including low-frequency excitations and medium-to-high-frequency excitations, can be performed. This allows for accurate testing of the train bearing performance and provides reliable data support for the design and production of train bearings.

[0102] In some embodiments, the train bearing testing equipment may further include: an insulated housing 140 and a temperature control device.

[0103] In this embodiment, the heat-insulating shell 140 defines a receiving cavity, the axle box 230 is located inside the receiving cavity, and the temperature control device is disposed in the heat-insulating shell 140 and is used to regulate the temperature inside the receiving cavity.

[0104] It is understandable that as trains continue to increase in speed, the spatial span of train operation gradually increases, and trains can travel longer distances in a shorter time, which in turn increases the degree of temperature variation in the train environment.

[0105] In this embodiment, the heat insulation shell 140 defines the receiving cavity, the axle box 230 is placed in the receiving cavity of the heat insulation shell 140, and the temperature in the receiving cavity is adjusted by the temperature control device to simulate the operating conditions of the train bearing under different temperature environments.

[0106] In actual operation, the temperature control device can increase the temperature inside the containment cavity, making it a high-temperature environment, or it can decrease the temperature inside the containment cavity, making it a low-temperature environment, to simulate real-world temperature changes.

[0107] The temperature control device can adjust the temperature inside the containment cavity to a fixed value, or it can control the temperature inside the containment cavity to change at a certain rate.

[0108] For example, the temperature inside the containment chamber can be adjusted to -10℃, or the temperature inside the containment chamber can be increased at a rate of 5℃ / h.

[0109] It is understandable that the operating temperature of bearing 220 is between -40℃ and 50℃, and the temperature control device can adjust the temperature inside the housing between -40℃ and 50℃ to apply different temperature environments to the train bearing assembly.

[0110] In some embodiments, the temperature control device may include a temperature control component and a gas circulation component.

[0111] In this embodiment, the heat-insulating shell 140 is provided with an airflow port 141, the gas circulation assembly delivers airflow to the receiving cavity through the airflow port 141, and the temperature control assembly is used to regulate the temperature of the airflow.

[0112] Understandably, the temperature control component regulates the temperature of the airflow, and the gas circulation component delivers airflow to the containment cavity through the airflow port 141. The continuously circulating airflow fills the entire containment cavity, resulting in a stable and uniform temperature throughout the cavity.

[0113] In this embodiment, the temperature control device may further include a humidity control component, which adjusts the humidity of the airflow delivered by the gas circulation component to simulate real-world humidity changes, improve the accuracy of train bearing performance testing, and provide reliable data support for the design and production of train bearings.

[0114] In some embodiments, the temperature control device includes a first temperature control device 151 and a second temperature control device 152.

[0115] The first temperature control device 151 is located in the heat-insulating shell 140 and is used to increase the temperature inside the cavity; the second temperature control device 152 is located in the heat-insulating shell 140 and is used to decrease the temperature inside the cavity.

[0116] In this embodiment, the heat-insulating shell 140 is provided with a first temperature control device 151 for increasing the temperature inside the cavity and a second temperature control device 152 for decreasing the temperature inside the cavity, with the heating device and the cooling device being provided separately.

[0117] When it is necessary to increase the temperature inside the cavity, simply turn on the first temperature control device 151 and turn off the second temperature control device 152 to achieve a rapid increase in the temperature inside the cavity; when it is necessary to decrease the temperature inside the cavity, simply turn on the second temperature control device 152 and turn off the first temperature control device 151 to achieve a rapid decrease in the temperature inside the cavity. The heating and cooling devices are set separately, and the temperature control devices can adjust the temperature inside the cavity more sensitively and quickly.

[0118] The following is a specific example.

[0119] like Figure 1 As shown, the first temperature control device 151 and the second temperature control device 152 are respectively disposed on both sides of the heat insulation shell 140. High temperature airflow and low temperature airflow are delivered to the receiving cavity through the airflow port 141 on the heat insulation shell 140 to simulate the real temperature environment for the train bearing assembly in the receiving cavity.

[0120] like Figure 2 As shown, in the vertical direction, a second load application device 160 is provided above the axle box 230, and a third load application device 170 and an elastic member 130 are provided below the platform 110 on which the axle box 230 is installed.

[0121] The third load application device 170 intermittently applies vertical loads to the platform 110 to simulate the wheel-rail excitation phenomenon that is common during train operation. The second load application device 160 simulates the gravity load caused by the self-weight of the train structure and the weight of the passengers and goods carried by the train. The elastic element 130 simulates the primary suspension between the axle box 230 and the frame of the train.

[0122] The second load application device 160, the third load application device 170, and the elastic element 130 can comprehensively and accurately simulate the loads that the train experiences in the vertical direction during operation.

[0123] A first load application device is provided on one side in the lateral direction, and a drive device 180 is provided on the other side.

[0124] The drive unit 180 drives the wheel axle 210 to rotate, simulating the train operation condition where the wheel axle 210 drives the wheels to rotate. The first load application device can apply load or off-center load to the bearing 220 to accurately simulate the train operation and the bearing operation condition when running on a small radius curve.

[0125] The train bearing testing equipment provided in this embodiment of the invention can comprehensively apply rotational, vertical, and lateral loads to the bearing 220, simulate the excitation of track irregularities, apply an off-center load to the bearing 220 through a first load application device to simulate the bearing conditions when the train passes through a small radius curve, and simulate the bearing 220 under real ambient temperature changes through a temperature control device to accurately test the performance of the train bearing and provide reliable data support for the design and production of train bearings.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A train bearing testing device, characterized in that, include: An axle box is used to mount a bearing to be tested, the bearing is sleeved on an axle, and the axle and the bearing are located inside the axle box; A first load application device includes multiple load output ends, which are used to contact the bearing and apply multiple lateral loads to the bearing, wherein at least two of the multiple lateral loads are of different magnitudes. A drive device, which is connected to the axle, is used to drive the axle to rotate; The first load application device is located on one side of the train bearing assembly; The first load application device applies multiple lateral loads of different magnitudes to the bearing, thereby applying an axial load to the bearing in the axle direction.

2. The train bearing testing equipment according to claim 1, characterized in that, The first load application device includes: A bracket is fitted onto the axle, and the plurality of load output ends are arranged circumferentially around the axle on the bracket.

3. The train bearing testing equipment according to claim 2, characterized in that, The first load application device includes: A first loading device, the first loading device being used to output load; A connecting rod, which connects the first loading device and the bracket.

4. The train bearing testing equipment according to claim 1, characterized in that, Also includes: A vibration damping device is connected to the axle box and is used to provide vertical elastic support force for the bearing.

5. The train bearing testing equipment according to claim 4, characterized in that, The vibration damping device includes: Platform, wherein the axle box is fixed to the first plane of the platform; An elastic element is connected to a second plane of the platform, and the first plane and the second plane are arranged opposite to each other.

6. The train bearing testing equipment according to claim 1, characterized in that, Also includes: An insulating shell defines a receiving cavity, and the axle box is located within the receiving cavity; A temperature control device is provided on the insulation shell and is used to regulate the temperature inside the receiving cavity.

7. The train bearing testing equipment according to claim 6, characterized in that, The temperature control device includes a temperature control component and a gas circulation component; The heat-insulating shell is provided with an airflow port, and the gas circulation assembly delivers airflow to the receiving cavity through the airflow port. The temperature control assembly is used to adjust the temperature of the airflow.

8. The train bearing testing equipment according to claim 6, characterized in that, The temperature control device includes: A first temperature control device is disposed in the heat-insulating shell and is used to increase the temperature inside the receiving cavity. A second temperature control device is disposed in the insulation shell and is used to reduce the temperature inside the cavity.

9. The train bearing testing equipment according to any one of claims 1-8, characterized in that, Also includes: A second load-applying device is used to contact the axle box and apply a downward vertical load to the axle box.

10. The train bearing testing equipment according to any one of claims 1-8, characterized in that, Also includes: A third load-applying device is used to contact the axle box and intermittently apply an upward vertical load to the axle box.

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