Test method for bearing dynamic load testing device

Abstract

The application provides a test method of a bearing dynamic load test device, the device comprising: first and second shaft boxes being spaced apart and being connected with a shaft body through bearings respectively; a first axial actuator being connected with one end of the first shaft box away from the shaft body along the axial direction of the shaft body to apply axial force to the first shaft box; a second axial actuator being connected with one end of the second shaft box away from the shaft body along the axial direction of the shaft body to apply axial force to the second shaft box; and a first valve body being connected with compression chambers and stretching chambers of the first and second axial actuators respectively to synchronously supply oil to the first and second axial actuators respectively. The application realizes simultaneous stretching and compression of two sets of loading systems on the shaft boxes at both ends of the shaft body by arranging actuators on the shaft boxes at both ends of the shaft body respectively, arranging valve bodies connected with the two actuators respectively, and interconnecting compression chambers of the two sets of loading systems and interconnecting stretching chambers of the two sets of loading systems.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test equipment, in particular to a test method of a bearing dynamic load test device. BACKGROUND

[0002] The bearing of a rail vehicle needs to be tested by dynamic loading, and the test data of the bearing is obtained to further judge the performance of the rail vehicle. The current dynamic loading test device is complex, cannot realize synchronous loading of the bearings at both ends of the shaft, and cannot accurately obtain the related data of the bearing during the loading process. SUMMARY

[0003] The present application provides a test method of a bearing dynamic load test device to solve the above-mentioned defects, by setting actuators on the shaft boxes at both ends of the shaft, and valve bodies connected with the two actuators respectively, and connecting the compression chambers of the two sets of loading systems with each other, and connecting the stretching chambers of the two sets of loading systems with each other, the simultaneous stretching and compression of the shaft boxes by the two sets of loading systems in physics can be realized.

[0004] According to the test method of the bearing dynamic load test device provided by the first aspect of the present application, a shaft body, a first shaft box, a second shaft box, a first axial actuator, a second axial actuator and a first valve body are included.

[0005] The first shaft box and the second shaft box are arranged at intervals and are connected with the shaft body through bearings respectively;

[0006] The first axial actuator is connected with one end of the first shaft box away from the shaft body along the axial direction of the shaft body, so as to apply an axial force to the first shaft box;

[0007] The second axial actuator is connected with one end of the second shaft box away from the shaft body along the axial direction of the shaft body, so as to apply an axial force to the other second shaft box;

[0008] The first valve body is connected with the compression chamber and the stretching chamber of the first axial actuator and the second axial actuator respectively, so as to realize synchronous oil supply to the first axial actuator and the second axial actuator respectively.

[0009] According to an embodiment of the present application, a first axial sensor and a second axial sensor are further included.

[0010] The first axial sensor is connected with the first axial actuator to obtain the displacement parameter and / or the force parameter of the first axial actuator;

[0011] The second axial sensor is connected with the second axial actuator to obtain displacement parameters and / or force parameters of the second axial actuator.

[0012] Specifically, the embodiment provides an implementation of the first axial sensor and the second axial sensor, and the first axial sensor and the second axial sensor are arranged to obtain the related parameters of the first axial sensor and the second axial actuator during the action.

[0013] According to an implementation of the present application, the first axial joint hinge and the second axial joint hinge are further included.

[0014] The first axial joint hinge is connected with the first axle box and the first axial actuator, respectively.

[0015] The second axial joint hinge is connected with the second axle box and the second axial actuator, respectively.

[0016] Specifically, the embodiment provides an implementation of the first axial joint hinge and the second axial joint hinge, and the first axial joint hinge and the second axial joint hinge are arranged to avoid stress concentration at the connection during the process of applying force to the first axle box and the second axle box by the first axial actuator and the second axial actuator.

[0017] According to an implementation of the present application, the first radial actuator and the second radial actuator are further included.

[0018] The first radial actuator is connected with the first axle box along the radial direction of the shaft body to apply radial force to the first axle box.

[0019] The second radial actuator is connected with the second axle box along the radial direction of the shaft body to apply radial force to the second axle box.

[0020] Specifically, the embodiment provides an implementation of the first radial actuator and the second radial actuator, and the first radial actuator and the second radial actuator are arranged to apply radial force to the first axle box and the second axle box, and to test the radial mechanical properties of the bearings in the axle box.

[0021] According to an implementation of the present application, the first radial sensor and the second radial sensor are further included.

[0022] The first radial sensor is connected with the first radial actuator to obtain displacement parameters and / or force parameters of the first radial actuator.

[0023] The second radial sensor is connected with the second radial actuator to obtain displacement parameters and / or force parameters of the second radial actuator.

[0024] Specifically, the embodiment provides an implementation of the first radial sensor and the second radial sensor, and by arranging the first radial sensor and the second radial sensor, the related parameters of the first radial sensor and the second radial actuator during the action process are obtained.

[0025] According to an embodiment of the present application, further comprising: a first radial joint hinge and a second radial joint hinge;

[0026] The first radial joint hinge is connected with the first shaft box and the first radial actuator respectively;

[0027] The second radial joint hinge is connected with the second shaft box and the second radial actuator respectively.

[0028] Specifically, the embodiment provides an implementation of the first radial joint hinge and the second radial joint hinge, and by arranging the first radial joint hinge and the second radial joint hinge, the stress concentration at the connection during the process of applying force to the first shaft box and the second shaft box by the first radial actuator and the second radial actuator is avoided.

[0029] According to an embodiment of the present application, further comprising: a second valve body and a third valve body;

[0030] The second valve body is connected with the compression cavity and the stretching cavity of the first axial actuator to realize oil supply to the first axial actuator;

[0031] The third valve body is connected with the compression cavity and the stretching cavity of the second axial actuator to realize oil supply to the second axial actuator.

[0032] Specifically, the embodiment provides an implementation of the second valve body and the third valve body, and by arranging the second valve body and the third valve body, when the first axial actuator and the second axial actuator are insufficient in oil intake, displacement or force during the action process, the second valve body and the third valve body can compensate for the oil supply, and the coupling phenomenon of the first axial actuator and the second axial actuator during the test process is avoided.

[0033] According to the test method based on the bearing dynamic load test device provided by the second aspect of the present application, comprising:

[0034] In response to the loading signal, the actuators at both ends of the first shaft box and the second shaft box are synchronously supplied with oil;

[0035] obtaining a first load feature vector and a second load feature vector, wherein the first load feature vector is directed to a load parameter of the first axle box, and the second load feature vector is directed to a load parameter of the second axle box;

[0036] determining a dynamic loading test result of the first axle box and the second axle box according to the first load feature vector and the second load feature vector.

[0037] According to an embodiment of the present application, the step of synchronously supplying oil to the actuators at both ends of the first axle box and the second axle box in response to the loading signal specifically comprises:

[0038] obtaining a first oil supply feature vector, a second oil supply feature vector, a third oil supply feature vector and a fourth oil supply feature vector, wherein the first oil supply feature vector is directed to a position parameter of two oil inlet chambers of the actuators, the second oil supply feature vector is directed to a flow parameter of oil supplied to the two actuators per unit time, the third oil supply feature vector is directed to a displacement parameter of the two actuators, and the fourth oil supply feature vector is directed to a force parameter of the two actuators;

[0039] generating a dynamic load function according to the first oil supply feature vector, the second oil supply feature vector, the third oil supply feature vector and the fourth oil supply feature vector, and making a judgment;

[0040] determining that a dynamic load curve generated by the dynamic load function meets a preset load curve in a continuous collection time period, generating a first oil supply strategy according to the dynamic load function, and synchronously supplying oil to the actuators at both ends of the first axle box and the second axle box according to the first oil supply strategy;

[0041] determining that the dynamic load curve generated by the dynamic load function does not meet the preset load curve in the continuous collection time period, extracting an offset parameter of the dynamic load curve and the preset load curve, generating a second oil supply strategy according to the offset parameter, and synchronously supplying oil to the actuators at both ends of the first axle box and the second axle box according to the second oil supply strategy.

[0042] Specifically, the embodiment provides an implementation manner of synchronously supplying oil to the actuators at both ends of the first axle box and the second axle box. According to the judgment of the dynamic load curve and the preset load curve, it can be determined whether the forces applied to both ends of the first axle box and the second axle box reach synchronization, that is, force size synchronization, force direction synchronization and force point synchronization, and further, it can be predicted whether the coupling phenomenon will occur at both ends of the first axle box and the second axle box, and a corresponding oil supply strategy can be generated according to the judgment result.

[0043] According to one embodiment of the present application, when the dynamic load curve generated by the dynamic load function does not satisfy the preset load curve in the continuous acquisition time period, the offset parameters of the dynamic load curve and the preset load curve are extracted, and in the step of generating a second oil supply strategy according to the offset parameters, specifically comprising:

[0044] According to the second oil supply feature vector, the third oil supply feature vector and the fourth oil supply feature vector, a fifth oil supply feature vector is determined, wherein the fifth oil supply feature vector points to the axle box that needs to be supplemented with oil supply;

[0045] According to the offset parameters, a sixth oil supply feature vector is determined, wherein the sixth oil supply feature vector points to the oil supply flow parameter that needs to be supplemented;

[0046] According to the first oil supply feature vector, the fifth oil supply feature vector and the sixth oil supply feature vector, the second oil supply strategy is generated;

[0047] According to the second oil supply strategy, the corresponding axle box is supplemented with oil supply.

[0048] Specifically, the embodiment provides an embodiment of generating a second oil supply strategy according to the offset parameters, determines the axle box that needs to be supplemented with oil supply and the oil supply flow that needs to be supplemented through the judgment of the forces acting on the two ends of the first axle box and the second axle box, and then supplies oil to the corresponding actuator, so as to avoid the coupling phenomenon occurring at the two ends of the first axle box and the second axle box, and ensure the test.

[0049] The above one or more technical solutions in the present application have at least one of the following technical effects: the test method of the bearing dynamic load test device provided by the present application can realize the simultaneous stretching and compression of the two sets of loading systems on the axle box by respectively arranging the actuators on the axle boxes at the two ends of the shaft body, respectively connecting the valve bodies with the two actuators, and connecting the compression chambers of the two sets of loading systems with each other.

[0050] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0052] Figure 1 is one of the assembly relationship schematic diagram of the bearing dynamic load test device provided by the application;

[0053] Figure 2 is the second assembly relationship schematic diagram of the bearing dynamic load test device provided by the application;

[0054] Figure 3 is the third assembly relationship schematic diagram of the bearing dynamic load test device provided by the application;

[0055] Figure 4 is the fourth assembly relationship schematic diagram of the bearing dynamic load test device provided by the application;

[0056] Figure 5 is the fifth assembly relationship schematic diagram of the bearing dynamic load test device provided by the application;

[0057] Figure 6 is the test method flow schematic diagram of the bearing dynamic load test device provided by the application.

[0058] Reference signs:

[0059] 10, shaft body;

[0060] 20, first shaft box; 21, first axial actuator; 22, first axial sensor; 23, first axial joint hinge; 24, first radial actuator; 25, first radial sensor; 26, first radial joint hinge;

[0061] 30, second shaft box; 31, second axial actuator; 32, second axial sensor; 33, second axial joint hinge; 34, second radial actuator; 35, second radial sensor; 36, second radial joint hinge;

[0062] 40, first valve body; 41, second valve body; 42, third valve body; 43, fourth valve body; 44, fifth valve body. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0064] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0065] In some specific embodiments of the present application, as shown in the scheme, Figures 1 to 5 The scheme provides a test method of a bearing dynamic load test device, which comprises a shaft body 10, a first shaft box 20, a second shaft box 30, a first axial actuator 21, a second axial actuator 31 and a first valve body 40; the first shaft box 20 and the second shaft box 30 are arranged at intervals and are connected with the shaft body 10 through bearings respectively; the first axial actuator 21 is connected with one end of the first shaft box 20 away from the shaft body 10 along the axial direction of the shaft body 10, so as to exert an axial force on the first shaft box 20; the second axial actuator 31 is connected with one end of the second shaft box 30 away from the shaft body 10 along the axial direction of the shaft body 10, so as to exert an axial force on the other second shaft box 30; the first valve body 40 is connected with the compression cavity and the stretching cavity of the first axial actuator 21 and the second axial actuator 31 respectively, so as to synchronously supply oil to the first axial actuator 21 and the second axial actuator 31 respectively.

[0066] In detail, the present application can realize the simultaneous stretching and compression of the two shaft boxes by the two sets of loading systems by arranging the actuators on the shaft boxes at both ends of the shaft body 10 respectively, arranging the valve body connected with the two actuators, and connecting the compression cavities of the two sets of loading systems with each other and connecting the stretching cavities of the two sets of loading systems with each other.

[0067] It should be noted that by connecting the compression cavity and the stretching cavity of the first axial actuator 21 and the second axial actuator 31 with one first valve body 40, the compression cavity and the stretching cavity of the first axial actuator 21 and the second axial actuator 31 are connected in parallel, the synchronism of the exertion of force on the two shaft boxes is ensured, the coupling effect between the loops is completely eliminated, and the first axial actuator 21 and the second axial actuator 31 can be synchronously stretched or synchronously compressed.

[0068] In some possible embodiments of the present application, the first axial sensor 22 and the second axial sensor 32 are further included; the first axial sensor 22 is connected with the first axial actuator 21 to realize the acquisition of the displacement parameter and / or the force parameter of the first axial actuator 21; the second axial sensor 32 is connected with the second axial actuator 31 to realize the acquisition of the displacement parameter and / or the force parameter of the second axial actuator 31.

[0069] Specifically, the present embodiment provides an implementation of the first axial sensor 22 and the second axial sensor 32; by arranging the first axial sensor 22 and the second axial sensor 32, the relevant parameters of the first axial sensor 22 and the second axial actuator 31 during the action process are realized.

[0070] In possible implementations, the first axial sensor 22 and the second axial sensor 32 are displacement sensors.

[0071] In possible implementations, the first axial sensor 22 and the second axial sensor 32 are force sensors.

[0072] In possible implementations, the first axial sensor 22 and the second axial sensor 32 can respectively measure the displacement and the force of the first axial actuator 21 and the second axial actuator 31.

[0073] In some possible embodiments of the present application, the first axial joint hinge 23 and the second axial joint hinge 33 are further included; the first axial joint hinge 23 is respectively connected with the first shaft box 20 and the first axial actuator 21; the second axial joint hinge 33 is respectively connected with the second shaft box 30 and the second axial actuator 31.

[0074] Specifically, the present embodiment provides an implementation of the first axial joint hinge 23 and the second axial joint hinge 33; by arranging the first axial joint hinge 23 and the second axial joint hinge 33, the stress concentration of the connection part of the first axial actuator 21 and the second axial actuator 31 during the process of applying the force to the first shaft box 20 and the second shaft box 30 is avoided.

[0075] In some possible embodiments of the present application, the first radial actuator 24 and the second radial actuator 34 are further included; the first radial actuator 24 is connected with the first shaft box 20 along the radial direction of the shaft body 10 to realize the application of the radial force to the first shaft box 20; the second radial actuator 34 is connected with the second shaft box 30 along the radial direction of the shaft body 10 to realize the application of the radial force to the second shaft box 30.

[0076] Specifically, the embodiment provides an implementation of the first radial actuator 24 and the second radial actuator 34, by arranging the first radial actuator 24 and the second radial actuator 34, radial force exerted on the first shaft box 20 and the second shaft box 30 is realized, and the radial mechanical properties of the bearing in the shaft box are tested.

[0077] In some possible embodiments of the present application, the first radial sensor 25 and the second radial sensor 35 are further included; the first radial sensor 25 is connected with the first radial actuator 24 to realize acquisition of displacement parameters and / or force parameters of the first radial actuator 24; and the second radial sensor 35 is connected with the second radial actuator 34 to realize acquisition of displacement parameters and / or force parameters of the second radial actuator 34.

[0078] Specifically, the embodiment provides an implementation of the first radial sensor 25 and the second radial sensor 35, by arranging the first radial sensor 25 and the second radial sensor 35, the related parameters of the first radial sensor 25 and the second radial actuator 34 in the action process are acquired.

[0079] In possible implementations, the first radial sensor 25 and the second radial sensor 35 are displacement sensors.

[0080] In possible implementations, the first radial sensor 25 and the second radial sensor 35 are force sensors.

[0081] In possible implementations, the first radial sensor 25 and the second radial sensor 35 can respectively measure the displacement and the force of the first radial actuator 24 and the second radial actuator 34.

[0082] In some possible embodiments of the present application, the first radial joint hinge 26 and the second radial joint hinge 36 are further included; the first radial joint hinge 26 is respectively connected with the first shaft box 20 and the first radial actuator 24; and the second radial joint hinge 36 is respectively connected with the second shaft box 30 and the second radial actuator 34.

[0083] Specifically, the embodiment provides an implementation of the first radial joint hinge 26 and the second radial joint hinge 36, by arranging the first radial joint hinge 26 and the second radial joint hinge 36, stress concentration at the connection of the first radial actuator 24 and the second radial actuator 34 in the process of exerting force on the first shaft box 20 and the second shaft box 30 is avoided.

[0084] In some possible embodiments of the present application, the second valve body 41 and the third valve body 42 are further included; the second valve body 41 is connected with the compression cavity and the stretching cavity of the first axial actuator 21 to realize oil supply to the first axial actuator 21; and the third valve body 42 is connected with the compression cavity and the stretching cavity of the second axial actuator 31 to realize oil supply to the second axial actuator 31.

[0085] Specifically, the present embodiment provides an implementation of the second valve body 41 and the third valve body 42, by arranging the second valve body 41 and the third valve body 42, when the first axial actuator 21 and the second axial actuator 31 have problems such as insufficient oil intake, insufficient displacement or inconsistent force during the operation, the second valve body 41 and the third valve body 42 can compensate for oil supply, thereby avoiding the coupling phenomenon of the first axial actuator 21 and the second axial actuator 31 during the test.

[0086] In some possible embodiments, the fourth valve body 43 and the fifth valve body 44 are further included; the fourth valve body 43 is connected with the compression cavity and the stretching cavity of the first radial actuator 24 to realize oil supply to the first radial actuator 24; and the fifth valve body 44 is connected with the compression cavity and the stretching cavity of the second radial actuator 34 to realize oil supply to the second radial actuator 34.

[0087] It should be noted that, by arranging the fourth valve body 43 and the fifth valve body 44, when the first radial actuator 24 and the second radial actuator 34 have problems such as insufficient oil intake, insufficient displacement or inconsistent force during the operation, the fourth valve body 43 and the fifth valve body 44 can compensate for oil supply, thereby avoiding the coupling phenomenon of the first radial actuator 24 and the second radial actuator 34 during the test.

[0088] In some specific embodiments of the present application, as shown in Figures 1 to 6 The present application provides a test method based on the bearing dynamic load test device, which comprises the following steps:

[0089] In response to the loading signal, synchronously supply oil to the actuators at both ends of the first shaft box 20 and the second shaft box 30;

[0090] Obtain a first load feature vector and a second load feature vector, wherein the first load feature vector is directed to the load parameters of the first shaft box 20, and the second load feature vector is directed to the load parameters of the second shaft box 30;

[0091] Determine the dynamic load test results of the first shaft box 20 and the second shaft box 30 according to the first load feature vector and the second load feature vector.

[0092] In some possible embodiments of the present application, in the step of synchronously supplying oil to the actuators at both ends of the first axle box 20 and the second axle box 30 in response to the loading signal, specifically includes:

[0093] The first oil supply feature vector, the second oil supply feature vector, the third oil supply feature vector and the fourth oil supply feature vector are obtained, wherein the first oil supply feature vector points to the position parameter of the two actuator oil inlet chambers, the second oil supply feature vector points to the flow parameter of the oil supplied to the two actuators respectively within a unit time, the third oil supply feature vector points to the displacement parameter of the two actuators, and the fourth oil supply feature vector points to the force parameter of the two actuators.

[0094] The dynamic load function is generated according to the first oil supply feature vector, the second oil supply feature vector, the third oil supply feature vector and the fourth oil supply feature vector, and a judgment is made.

[0095] In the continuous acquisition time period, if it is determined that the dynamic load curve generated by the dynamic load function satisfies the preset load curve, a first oil supply strategy is generated according to the dynamic load function, and the actuators at both ends of the first axle box 20 and the second axle box 30 are synchronously supplied with oil according to the first oil supply strategy.

[0096] In the continuous acquisition time period, if it is determined that the dynamic load curve generated by the dynamic load function does not satisfy the preset load curve, an offset parameter of the dynamic load curve and the preset load curve is extracted, a second oil supply strategy is generated according to the offset parameter, and the actuators at both ends of the first axle box 20 and the second axle box 30 are synchronously supplied with oil according to the second oil supply strategy.

[0097] Specifically, the embodiment provides an implementation manner of synchronously supplying oil to the actuators at both ends of the first axle box 20 and the second axle box 30. According to the judgment of the dynamic load curve and the preset load curve, it can be determined whether the forces applied at both ends of the first axle box 20 and the second axle box 30 reach synchronization, i.e., force size synchronization, force direction synchronization and force point synchronization, and further, it can be predicted whether the coupling phenomenon will occur at both ends of the first axle box 20 and the second axle box 30, and a corresponding oil supply strategy is generated according to the judgment result.

[0098] In possible embodiments, the forces at both ends of the first axle box 20 and the second axle box 30 include the axial tensile forces applied by the first axial actuator 21 and the second axial actuator 31 to the first axle box 20 and the second axle box 30 respectively.

[0099] In possible embodiments, the forces at both ends of the first axle box 20 and the second axle box 30 include the axial compression forces applied by the first axial actuator 21 and the second axial actuator 31 to the first axle box 20 and the second axle box 30 respectively.

[0100] In possible embodiments, the forces acting on both ends of the first axle box 20 and the second axle box 30 include the radial tensile forces applied by the first radial actuator 24 and the second radial actuator 34 to the first axle box 20 and the second axle box 30, respectively.

[0101] In possible embodiments, the forces acting on both ends of the first axle box 20 and the second axle box 30 include the radial compressive forces applied by the first radial actuator 24 and the second radial actuator 34 to the first axle box 20 and the second axle box 30, respectively.

[0102] In some possible embodiments of the present application, if the dynamic load curve generated by the dynamic load function does not satisfy the preset load curve in the continuous acquisition time period, the offset parameters of the dynamic load curve and the preset load curve are extracted, and in the step of generating the second oil supply strategy according to the offset parameters, the step specifically includes:

[0103] A fifth oil supply feature vector is determined according to the second oil supply feature vector, the third oil supply feature vector, and the fourth oil supply feature vector, wherein the fifth oil supply feature vector points to the axle box that needs to be supplemented with oil supply;

[0104] A sixth oil supply feature vector is determined according to the offset parameters, wherein the sixth oil supply feature vector points to the oil supply flow parameter that needs to be supplemented;

[0105] A second oil supply strategy is generated according to the first oil supply feature vector, the fifth oil supply feature vector, and the sixth oil supply feature vector;

[0106] According to the second oil supply strategy, oil supply is supplemented to the corresponding axle box.

[0107] Specifically, the present embodiment provides an implementation of generating a second oil supply strategy according to offset parameters, by judging the forces acting on both ends of the first axle box 20 and the second axle box 30, the axle box that needs to be supplemented with oil supply and the oil supply flow that needs to be supplemented are determined, and then oil supply is performed to the corresponding actuator, so as to avoid the occurrence of the coupling phenomenon on both ends of the first axle box 20 and the second axle box 30, and ensure the performance of the test.

[0108] In possible embodiments, at least one of the displacement, the force, and the flow of the first axial actuator 21 is smaller than that of the second axial actuator 31, the oil supply amount that needs to be supplemented is determined, and through the second valve body 41, oil supply is performed to the corresponding chamber of the first axial actuator 21.

[0109] In possible embodiments, at least one of the displacement, the force, and the flow of the first radial actuator 24 is smaller than that of the second radial actuator 34, the oil supply amount that needs to be supplemented is determined, and through the fourth valve body 43, oil supply is performed to the corresponding chamber of the first radial actuator 24.

[0110] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connected to", "connection", "connect", "connecting", etc. should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0111] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "way", "specific way", or "some ways" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or way are included in at least one embodiment or way of the embodiments of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or way. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or ways in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or features of the different embodiments or ways described in the present application without contradiction.

[0112] Finally, it should be noted that: the above implementation is only used to illustrate the present application, and is not limited to the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and should be covered in the scope of the claims of the present application.

Claims

1. A test method of a bearing dynamic load test device, characterized in that, the device comprises: a shaft body, a first shaft box, a second shaft box, a first axial actuator, a second axial actuator and a first valve body; the first shaft box and the second shaft box are arranged at intervals and are connected with the shaft body through bearings respectively; the first axial actuator is connected with one end of the first shaft box away from the shaft body along the axial direction of the shaft body to apply axial force to the first shaft box; the second axial actuator is connected with one end of the second shaft box away from the shaft body along the axial direction of the shaft body to apply axial force to the second shaft box; the first valve body is connected with the compression chamber and the stretching chamber of the first axial actuator and the second axial actuator respectively, so that the compression chamber and the stretching chamber of the first axial actuator and the second axial actuator are connected in parallel to realize synchronous oil supply to the first axial actuator and the second axial actuator respectively; the method comprises: synchronously supplying oil to the actuators at both ends of the first shaft box and the second shaft box in response to a loading signal; obtaining a first load feature vector and a second load feature vector, wherein the first load feature vector is directed to a load parameter of the first shaft box, and the second load feature vector is directed to a load parameter of the second shaft box; determining a dynamic load test result of the first shaft box and the second shaft box according to the first load feature vector and the second load feature vector; specifically comprising: obtaining a first oil supply feature vector, a second oil supply feature vector, a third oil supply feature vector and a fourth oil supply feature vector, wherein the first oil supply feature vector is directed to a position parameter of the oil inlet chamber of the two actuators, the second oil supply feature vector is directed to a flow parameter of oil supply to the two actuators per unit time respectively, the third oil supply feature vector is directed to a displacement parameter of the two actuators, and the fourth oil supply feature vector is directed to a force parameter of the two actuators; generating a dynamic load function according to the first oil supply feature vector, the second oil supply feature vector, the third oil supply feature vector and the fourth oil supply feature vector, and judging; in a continuous acquisition time period, determining that a dynamic load curve generated by the dynamic load function satisfies a preset load curve, then generating a first oil supply strategy according to the dynamic load function, and synchronously supplying oil to the actuators at both ends of the first shaft box and the second shaft box according to the first oil supply strategy; in a continuous acquisition time period, determining that a dynamic load curve generated by the dynamic load function does not satisfy a preset load curve, then extracting an offset parameter of the dynamic load curve and the preset load curve, generating a second oil supply strategy according to the offset parameter, and synchronously supplying oil to the actuators at both ends of the first shaft box and the second shaft box according to the second oil supply strategy; According to the judgment of the dynamic load curve and the preset load curve, whether the forces applied to the two ends of the first shaft box and the second shaft box reach synchronization, i.e., force size synchronization, force direction synchronization and force point synchronization, can be determined, and whether the coupling phenomenon will occur at the two ends of the first shaft box and the second shaft box can be predicted, and a corresponding oil supply strategy is generated according to the judgment result.

2. The test method of the bearing dynamic load tester according to claim 1, wherein The device further comprises a first axial sensor and a second axial sensor; The first axial sensor is connected with the first axial actuator to obtain the displacement parameter and / or the force parameter of the first axial actuator; The second axial sensor is connected with the second axial actuator to obtain the displacement parameter and / or the force parameter of the second axial actuator.

3. The test method of the bearing dynamic load tester according to claim 1, wherein The device further comprises a first axial joint hinge and a second axial joint hinge; The first axial joint hinge is connected with the first axial actuator and the first shaft box respectively; The second axial joint hinge is connected with the second axial actuator and the second shaft box respectively.

4. The test method of the bearing dynamic load tester according to any one of claims 1 to 3, characterized in that, The device further comprises a first radial actuator and a second radial actuator; The first radial actuator is connected with the first shaft box along the radial direction of the shaft body to apply a radial force to the first shaft box; The second radial actuator is connected with the second shaft box along the radial direction of the shaft body to apply a radial force to the second shaft box.

5. The test method of a bearing dynamic load tester according to claim 4, wherein The device further comprises a first radial sensor and a second radial sensor; The first radial sensor is connected with the first radial actuator to obtain the displacement parameter and / or the force parameter of the first radial actuator; The second radial sensor is connected with the second radial actuator to obtain the displacement parameter and / or the force parameter of the second radial actuator.

6. The test method of claim 4, wherein The device further comprises a first radial joint hinge and a second radial joint hinge; The first radial joint hinge is connected with the first radial actuator and the first shaft box respectively; The second radial joint hinge is connected with the second radial actuator and the second shaft box respectively.

7. The test method of the bearing dynamic load tester according to any one of claims 1 to 3, characterized by, The device further comprises a second valve body and a third valve body; The second valve body is connected with the compression cavity and the stretching cavity of the first axial actuator to supply oil to the first axial actuator; The third valve body is connected with the compression cavity and the stretching cavity of the second axial actuator to supply oil to the second axial actuator.

8. The test method of claim 1, wherein, In the step of determining that the dynamic load curve generated by the dynamic load function does not satisfy the preset load curve in the continuous acquisition time period, the specific steps include: determining a fifth oil supply feature vector according to the second oil supply feature vector, the third oil supply feature vector and the fourth oil supply feature vector, wherein the fifth oil supply feature vector points to the shaft box that needs to be supplemented with oil; determining a sixth oil supply feature vector according to the offset parameter, wherein the sixth oil supply feature vector points to the oil flow parameter that needs to be supplemented; generating the second oil supply strategy according to the first oil supply feature vector, the fifth oil supply feature vector and the sixth oil supply feature vector; supplementing oil to the corresponding axle box according to the second oil supply strategy.

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