A wheel set bearing fault diagnosis device and method

Abstract

The present invention relates to the technical field of rail transit, and discloses a wheel set bearing fault diagnosis device and method, which include a first support assembly, a loading assembly, a driving assembly, a detection module, a control module and a data processing module. The first support assembly is used to support the wheel set to be tested, the loading assembly is used to load the wheel set bearing of the wheel set to be tested, and the driving assembly is used to drive the accompanying test wheel set to rotate so as to drive the wheel set to be tested to rotate. The detection module is used to measure the vibration information of the wheel set bearing, and the control module can control the driving assembly to drive the accompanying test wheel set to rotate and control the loading assembly to load the wheel set bearing. The data processing module can judge the fault condition of the wheel set to be tested according to the vibration information measured by the detection module. The present invention can quickly measure the fault condition of the wheel set bearing without disassembling the wheel set bearing, and has high diagnosis efficiency. Moreover, it can ensure the diagnosis accuracy of the wheel set bearing, avoid the use of faulty wheel sets, and improve the driving safety of freight cars.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and particularly to a wheel set bearing fault diagnosis device and method. Background Art

[0002] Internal faults of railway freight car wheel set bearings are major hidden dangers to train operation safety. Due to the lack of understanding of the fault mechanism of wheel set bearings and the lack of correct fault diagnosis methods, it is easy for faulty wheel set bearings to be put into use, leading to train operation safety accidents. During regular maintenance, how to effectively diagnose without disassembling the wheel set bearings to ensure that the wheel set bearings put into use are fault-free is an urgent problem to be solved currently.

[0003] In the prior art, there are two methods for detecting wheel set bearings. One is to judge according to experience, that is, to push the freight car wheel set to the detection station, and the operator pushes the outer ring of the wheel set bearing by hand to make the wheel set bearing rotate, and checks whether there are problems such as jamming, uneven rotation, abnormal noise, etc. of the wheel set bearing by touching with hands and listening with ears, so as to decide whether the wheel set bearing needs to be replaced. However, the rotation speed of the wheel set bearing pushed by hand is very low, which is far from the actual operation condition of the wheel set bearing. Many faults cannot be detected, the fault diagnosis accuracy is low, and manual detection is time-consuming and laborious, with extremely low detection efficiency and high detection cost. The other is to measure the bearing temperature rise by using a rotating device, but the rotation time is limited by the maintenance flow rhythm, and the bearing temperature rise measurement is inaccurate, which also affects the fault diagnosis accuracy of the wheel set bearing. Summary of the Invention

[0004] Based on the above problems, the purpose of the present invention is to provide a wheel set bearing fault diagnosis device and method, which can quickly measure the fault condition of the wheel set bearing without disassembling the wheel set bearing, with accurate fault diagnosis and high diagnosis efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] On the one hand, a wheel set bearing fault diagnosis device is provided, including:

[0007] A first support assembly for supporting the wheel set to be tested, a pilot wheel set is installed below the first support assembly, and the wheel flange of the pilot wheel set is configured to be able to rollingly cooperate with the tread of the wheel set to be tested;

[0008] A loading assembly for loading the wheel set bearing of the wheel set to be tested;

[0009] A driving assembly for driving the pilot wheel set to rotate so as to drive the wheel set to be tested to rotate;

[0010] A detection module for measuring the vibration information of the wheel set bearing;

[0011] A control module, which can control the driving component to drive the test wheel set to rotate and control the loading component to load the wheel set bearing;

[0012] A data processing module, which can judge the fault condition of the to-be-tested wheel set according to the vibration information measured by the detection module.

[0013] As a preferred solution of the wheel set bearing fault diagnosis device of the present invention, the first support component includes a first support frame and a second support frame arranged at intervals. A first fixed track is arranged on the first support frame, and a second fixed track is arranged on the second support frame. The two wheels of the to-be-tested wheel set can respectively rollingly cooperate with the first fixed track and the second fixed track.

[0014] As a preferred solution of the wheel set bearing fault diagnosis device of the present invention, the wheel set bearing fault diagnosis device further includes a first auxiliary track and a second auxiliary track. The two wheels of the test wheel set are respectively located below the first auxiliary track and the second auxiliary track. One end of the first auxiliary track is hinged to the first support frame, and the other end can be selectively docked with the first fixed track. One end of the second auxiliary track is hinged to the second support frame, and the other end can be selectively docked with the second fixed track.

[0015] As a preferred solution of the wheel set bearing fault diagnosis device of the present invention, the wheel set bearing fault diagnosis device further includes a first lifting drive mechanism and a cross bar connected to the first lifting drive mechanism. One end of the cross bar is connected to the first auxiliary track, and the other end is connected to the second auxiliary track. The first lifting drive mechanism can drive the cross bar to lift, so as to drive the first auxiliary track and the second auxiliary track to rotate relative to the first support frame and the second support frame.

[0016] As a preferred solution of the wheel set bearing fault diagnosis device of the present invention, the wheel set bearing fault diagnosis device further includes a second support component. The loading component is installed on the second support component and is located above the to-be-tested wheel set.

[0017] As a preferred solution of the wheel set bearing fault diagnosis device of the present invention, the second support component includes a first bracket, a second bracket and a cross beam. The two ends of the cross beam are respectively connected to the first bracket and the second bracket. The loading component includes a second lifting drive mechanism, a mounting frame, and a first claw and a second claw respectively arranged at both ends of the mounting frame. The first claw and the second claw can respectively hold the corresponding wheel set bearing. The second lifting drive mechanism is installed on the cross beam and is used to drive the mounting frame to lift relative to the cross beam, so that the first claw and the second claw load the wheel set bearing.

[0018] As a preferred solution of the wheel pair bearing fault diagnosis device of the present invention, the detection module includes a first vibration sensor and a second vibration sensor. The first vibration sensor is disposed on the first jaw, and the second vibration sensor is disposed on the second jaw.

[0019] As a preferred solution of the wheel pair bearing fault diagnosis device of the present invention, the wheel pair bearing fault diagnosis device further includes a detection camera electrically connected to the data processing module. The detection camera is used to detect the model of the to-be-tested wheel pair.

[0020] As a preferred solution of the wheel pair bearing fault diagnosis device of the present invention, the wheel pair bearing fault diagnosis device further includes a first fixing seat and a second fixing seat. The two bearings of the test wheel pair are respectively fixed on the first fixing seat and the second fixing seat.

[0021] On the other hand, a method for diagnosing faults of a wheel pair bearing is provided. Using the wheel pair bearing fault diagnosis device as described above, the method includes the following steps:

[0022] Place the to-be-tested wheel pair on the first support assembly, and adjust the to-be-tested wheel pair to be centered with the test wheel pair;

[0023] Control the loading assembly to load the wheel pair bearing of the to-be-tested wheel pair through the control module until the load is loaded to a preset value, and then stop loading;

[0024] Control the driving assembly to drive the test wheel pair to rotate through the control module, and drive the to-be-tested wheel pair to rotate until the to-be-tested wheel pair reaches a preset rotational speed;

[0025] The detection module measures the vibration information of the wheel pair bearing in real time, and transmits the vibration information of the wheel pair bearing to the data processing module;

[0026] The data processing module determines whether there is a fault in the wheel pair bearing according to the vibration information measured by the detection module.

[0027] The beneficial effects of the present invention are:

[0028] The wheel set bearing fault diagnosis device provided by the present invention, when detecting the fault condition of the wheel set bearing, first places the wheel set to be tested on the first support assembly and adjusts the position of the wheel set to be tested to make it centered with the reference wheel set, that is, to ensure that the flange of the reference wheel set can rollingly cooperate with the tread of the wheel set to be tested. Then, the control module controls the loading assembly to start to load the wheel set bearing of the wheel set to be tested. When the loading load reaches the preset value, the loading is stopped. Subsequently, the control module controls the driving assembly to start, so that the driving assembly drives the reference wheel set to rotate and drives the wheel set to be tested to rotate until the rotational speed of the wheel set to be tested reaches the preset value. During this process, the detection module can measure the vibration information of the two wheel set bearings of the wheel set to be tested in real time and transmit the measured vibration information to the data processing module. The data processing module can judge whether there is a fault in the wheel set bearing of the wheel set to be tested according to the vibration information of the wheel set bearing, so as to complete the fault diagnosis of the wheel set bearing. The wheel set bearing fault diagnosis method provided by the present invention can quickly measure the fault condition of the wheel set bearing without disassembling the wheel set bearing, and has high diagnosis efficiency. Moreover, this diagnosis method does not rely on human experience judgment, does not require a large amount of labor, reduces the test cost, can ensure the diagnosis accuracy of the wheel set bearing, avoids the use of faulty wheel sets, and thus improves the driving safety of freight cars. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0030] Figure 1 is the front view of the wheel set bearing fault diagnosis device provided by the specific embodiment of the present invention;

[0031] Figure 2 is the side view of the wheel set bearing fault diagnosis device provided by the specific embodiment of the present invention;

[0032] Figure 3 is the top view of the wheel set bearing fault diagnosis device provided by the specific embodiment of the present invention;

[0033] Figure 4 is the flowchart of the wheel set bearing fault diagnosis method provided by the specific embodiment of the present invention.

[0034] In the figure:

[0035] 1 - First support component; 2 - Loading component; 3 - Driving component; 5 - Second support component; 6 - First auxiliary track; 7 - Second auxiliary track; 8 - First lifting drive mechanism; 9 - Cross bar; 10 - Detection camera; 20 - First fixed seat; 30 - Second fixed seat; 40 - Third fixed seat;

[0036] 11 - First support frame; 12 - Second support frame; 13 - Connecting rod;

[0037] 111 - First fixed track; 112 - Top support beam; 113 - Bottom support beam; 114 - First vertical support beam; 115 - Second vertical support beam; 116 - Third vertical support beam; 121 - Second fixed track;

[0038] 21 - Second lifting drive mechanism; 22 - Mounting bracket; 23 - First claw; 24 - Second claw;

[0039] 41 - First vibration sensor; 42 - Second vibration sensor;

[0040] 51 - First bracket; 52 - Second bracket; 53 - Cross beam;

[0041] 100 - Wheel set to be tested; 101 - Wheel set bearing; 200 - Companion wheel set; 300 - Test platform. Detailed implementation mode

[0042] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] As Figures 1 to 3 shown, this embodiment provides a wheel set bearing fault diagnosis device, which can diagnose faults of the wheel set bearing 101 of a railway freight car. The wheel set bearing fault diagnosis device includes a first support assembly 1, a loading assembly 2, a driving assembly 3, a detection module, a control module, and a data processing module.

[0046] Among them, the first support assembly 1 is used to support the wheel set 100 to be tested. A trial wheel set 200 is installed below the first support assembly 1, and the flange of the trial wheel set 200 is configured to be able to rollingly cooperate with the tread of the wheel set 100 to be tested. The loading assembly 2 is used to load the wheel set bearing 101 of the wheel set 100 to be tested, and the driving assembly 3 is used to drive the trial wheel set 200 to rotate so as to drive the wheel set 100 to be tested to rotate. The detection module is used to measure the vibration information of the wheel set bearing 101, and the control module can control the driving assembly 3 to drive the trial wheel set 200 to rotate and control the loading assembly 2 to load the wheel set bearing 101. The data processing module can judge the fault condition of the wheel set 100 to be tested according to the vibration information measured by the detection module.

[0047] When the wheel set bearing fault diagnosis device provided in this embodiment detects the fault condition of the wheel set bearing 101, first place the wheel set 100 to be tested on the first support assembly 1 and adjust the position of the wheel set 100 to be tested to be centered with the trial wheel set 200, that is, ensure that the flange of the trial wheel set 200 can rollingly cooperate with the tread of the wheel set 100 to be tested. Then, control the loading assembly 2 to start through the control module to load the wheel set bearing 101 of the wheel set 100 to be tested, and stop loading when the loading load reaches the preset value. Subsequently, control the driving assembly 3 to start through the control module so that the driving assembly 3 drives the trial wheel set 200 to rotate and drives the wheel set 100 to be tested to rotate until the rotation speed of the wheel set 100 to be tested reaches the preset value. During this process, the detection module can measure the vibration information of the two wheel set bearings 101 of the wheel set 100 to be tested in real time and transmit the measured vibration information to the data processing module. The data processing module can judge whether the wheel set bearing 101 of the wheel set 100 to be tested has a fault according to the vibration information of the wheel set bearing 101 to complete the fault diagnosis of the wheel set bearing 101.

[0048] The wheel set bearing fault diagnosis device provided in this embodiment can quickly measure the fault condition of the wheel set bearing 101 without disassembling the wheel set bearing 101, with high diagnosis efficiency. And it does not rely on human experience judgment, does not require a large amount of labor input, can ensure the diagnosis accuracy of the wheel set bearing 101 while reducing the test cost, avoid the use of faulty wheel sets, and thus improve the driving safety of freight cars.

[0049] Optionally, refer to Figure 1 and Figure 3 , the first support assembly 1 includes a first support frame 11 and a second support frame 12 arranged at intervals. A first fixed track 111 is provided on the first support frame 11, and a second fixed track 121 is provided on the second support frame 12. The two wheels of the wheel set 100 to be measured can respectively roll and cooperate with the first fixed track 111 and the second fixed track 121. Specifically, when transporting the wheel set 100 to be measured to the detection position, first place the two wheels of the wheel set 100 to be measured on the first fixed track 111 and the second fixed track 121 respectively, and then drive the wheel set 100 to be measured to roll to the detection position. The first fixed track 111 and the second fixed track 121 can provide a guiding function for the movement of the wheel set 100 to be measured, prevent the wheel set 100 to be measured from deviating, and the transfer of the wheel set 100 to be measured is convenient.

[0050] In this embodiment, refer to Figure 2 , both the first support frame 11 and the second support frame 12 include a top support beam 112, a bottom support beam 113, and a first vertical support beam 114, a second vertical support beam 115, and a third vertical support beam 116 arranged in sequence along the length direction of the bottom support beam 113. One end of the top support beam 112 is connected to the first vertical support beam 114, and the other end is connected to the second vertical support beam 115. The first fixed track 111 is fixed on the top support beam 112 of the first support frame 11, and the second fixed track 121 is fixed on the top support beam 112 of the second support frame 12. Further, refer to Figure 1 and Figure 3 , a plurality of connecting rods 13 are further arranged between the bottom support beam 113 of the first support frame 11 and the bottom support beam 113 of the second support frame 12. The plurality of connecting rods 13 can connect the first support frame 11 and the second support frame 12, enhancing the support stability of the entire first support assembly 1.

[0051] Optionally, refer to Figure 2 and Figure 3, the wheel set bearing fault diagnosis device further includes a first auxiliary track 6 and a second auxiliary track 7. The two wheels of the test wheel set 200 are respectively located below the first auxiliary track 6 and the second auxiliary track 7. One end of the first auxiliary track 6 is hinged to the first support frame 11, and the other end can be selectively docked with the first fixed track 111. One end of the second auxiliary track 7 is hinged to the second support frame 12, and the other end can be selectively docked with the second fixed track 121. In this embodiment, the first auxiliary track 6 is hinged to the top of the third vertical support beam 116 of the first support frame 11, and the second auxiliary track 7 is hinged to the top of the third vertical support beam 116 of the second support frame 12. The test wheel set 100 can be moved into place through the first auxiliary track 6 and the second auxiliary track 7.

[0052] In the initial state, the first auxiliary track 6 is docked and flush with the first fixed track 111 (the two are not connected and fixed together), and the second auxiliary track 7 is docked and flush with the second fixed track 121 (the two are not connected and fixed together). When the test wheel set 100 rolls along the first fixed track 111 and the second fixed track 121 onto the first auxiliary track 6 and the second auxiliary track 7 and is aligned with the test wheel set 200 below, the test wheel set 100 stops rolling. Subsequently, the first auxiliary track 6 and the second auxiliary track 7 are driven to rotate downward, so that the two drive the test wheel set 100 to descend until the treads of the two wheels of the test wheel set 100 are respectively in contact with the wheel rims of the two wheels of the test wheel set 200. When the first auxiliary track 6 and the second auxiliary track 7 both disengage from the two wheels of the test wheel set 100, the test wheel set 100 is moved into place. At this time, the test wheel set 200 can be driven to rotate by the driving assembly 3, and then drive the test wheel set 100 to rotate to diagnose the faults of the wheel set bearing 101 of the test wheel set 100.

[0053] Optionally, refer to Figures 1 to 3, the axle - wheel bearing fault diagnosis device further includes a first lifting drive mechanism 8 and a cross - bar 9 connected to the first lifting drive mechanism 8. One end of the cross - bar 9 is connected to the first auxiliary track 6, and the other end is connected to the second auxiliary track 7. The second lifting drive mechanism 21 can drive the cross - bar 9 to lift or lower, so as to drive the first auxiliary track 6 and the second auxiliary track 7 to rotate relative to the first support frame 11 and the second support frame 12. In the initial state, the first auxiliary track 6 is flush with the first fixed track 111, and the second auxiliary track 7 is flush with the second fixed track 121. When the axle - wheel pair 100 to be tested rolls to face the test - companion axle - wheel pair 200, start the first lifting drive mechanism 8 to drive the cross - bar 9 to descend. At this time, the ends of the first auxiliary track 6 and the second auxiliary track 7 in contact with the axle - wheel pair 100 will descend. When the axle - wheel pair 100 descends to contact the test - companion axle - wheel pair 200 and both the first auxiliary track 6 and the second auxiliary track 7 are separated from the axle - wheel pair 100, the first lifting drive mechanism 8 stops. After the axle - wheel bearing 101 of the axle - wheel pair 100 is tested, start the first lifting drive mechanism 8 again to drive the cross - bar 9 to rise, and then drive the ends of the first auxiliary track 6 and the second auxiliary track 7 close to the axle - wheel pair 100 to rise, while jacking up the axle - wheel pair 100 until the first auxiliary track 6 and the second auxiliary track 7 are respectively flush with the first fixed track 111 and the second fixed track 121. At this time, the tested axle - wheel pair 100 can be moved out along the first fixed track 111 and the second fixed track 121.

[0054] Preferably, the first lifting drive mechanism 8 is a hydraulic cylinder, with stable lifting drive and capable of realizing remote control. In other embodiments, the first lifting drive mechanism 8 can also be a pneumatic cylinder or a lead - screw lifting mechanism.

[0055] Optionally, refer to Figures 1 to 3 , the axle - wheel bearing fault diagnosis device further includes a second support assembly 5. The loading assembly 2 is installed on the second support assembly 5 and is located above the axle - wheel pair 100 to be tested. Specifically, the second support assembly 5 includes a first support 51, a second support 52 and a cross - beam 53. The two ends of the cross - beam 53 are respectively connected to the first support 51 and the second support 52. Refer to Figure 2 , both the first support 51 and the second support 52 include two columns arranged at intervals to stably support the cross - beam 53. Refer to Figure 1 and Figure 2, the loading component 2 includes a second lifting drive mechanism 21, a mounting bracket 22, and a first claw 23 and a second claw 24 respectively disposed at both ends of the mounting bracket 22. One end of the mounting bracket 22 is located between the two columns of the first bracket 51, and the other end is located between the two columns of the second bracket 52. The first claw 23 and the second claw 24 can respectively hold the corresponding axle journal bearings 101. The second lifting drive mechanism 21 is installed on the cross beam 53 and is used to drive the mounting bracket 22 to lift relative to the cross beam 53, so that the first claw 23 and the second claw 24 load the axle journal bearings 101.

[0056] Preferably, the second lifting drive mechanism 21 is a hydraulic cylinder, with stable lifting and easy control. In other embodiments, a pneumatic cylinder or the like can also be used.

[0057] In this embodiment, a second lifting drive mechanism 21 is provided at each end of the cross beam 53, and the two second lifting drive mechanisms 21 are respectively opposite to the first claw 23 and the second claw 24. In the initial state, both second lifting drive mechanisms 21 are at the upper limit position, and the first claw 23 and the second claw 24 are both far away from the axle journal to be tested 100 to prevent interference with the first claw 23 and the second claw 24 during the process of the axle journal to be tested 100 rolling into place. When the axle journal to be tested 100 moves to directly above the companion axle journal 200, the control module controls the two second lifting drive mechanisms 21 to drive the mounting bracket 22 to descend to the first lower limit position, so that the first claw 23 and the second claw 24 respectively hold the corresponding axle journal bearings 101 (at this time, the first claw 23 and the second claw 24 only contact the axle journal bearings 101 and do not apply load). Refer to Figure 2 , arc-shaped grooves are provided on both the first claw 23 and the second claw 24, and the axle journal bearings 101 are located in the arc-shaped grooves.

[0058] After the first claw 23 and the second claw 24 respectively hold the corresponding axle journal bearings 101, the control module controls the first lifting drive mechanism 8 to drive the cross bar 9 to descend, so that one end of the first auxiliary track 6 and the second auxiliary track 7 in contact with the axle journal to be tested 100 descends. When the axle journal to be tested 100 descends to contact the companion axle journal 200, the control module controls the two second lifting drive mechanisms 21 to drive the mounting bracket 22 to continue descending, so that the first claw 23 and the second claw 24 apply load to the axle journal bearings 101 until the applied load reaches the preset value. At this time, the mounting bracket 22 descends to the second lower limit position, and the second lifting drive mechanism 21 stops descending. Subsequently, the control module controls the drive assembly 3 to drive the companion axle journal 200 to rotate, thereby driving the axle journal to be tested 100 to rotate for fault diagnosis of the axle journal bearings 101 of the axle journal to be tested 100.

[0059] Optionally, refer to Figure 1, the detection module includes a first vibration sensor 41 and a second vibration sensor 42. The first vibration sensor 41 is arranged on the first jaw 23 and is used to measure the vibration information of the left wheel pair bearing 101 of the to-be-tested wheel pair 100 (refer to the orientation in Figure 1 ), and the second vibration sensor 42 is arranged on the second jaw 24 and is used to measure the vibration information of the right wheel pair bearing 101 of the to-be-tested wheel pair 100. Both the first vibration sensor 41 and the second vibration sensor 42 are communicatively connected to the data processing module through signal lines, and the vibration information measured by both is transmitted to the data processing module in a network form, so as to judge the fault condition of the wheel pair bearing 101 according to the vibration information. In this embodiment, the measured vibration information is a vibration wave.

[0060] Optionally, referring to Figure 2 , the wheel pair bearing fault diagnosis device further includes a detection camera 10 electrically connected to the data processing module. The detection camera 10 is used to detect the model of the to-be-tested wheel pair 100. The detection camera 10 is installed on the first bracket 51 of the second support assembly 5 and is opposite to the pasting position of the identification plate of the to-be-tested wheel pair 100. When the to-be-tested wheel pair 100 moves into place, the control module receives the corresponding command information and controls the detection camera 10 to start, takes a picture of the identification plate on the to-be-tested wheel pair 100, and the taken picture is transmitted to the data processing module in a network form. The data processing module identifies the identification plate information according to the image, so that the measured vibration information and the fault result are in one-to-one correspondence with the identification plate, which is convenient for later viewing and identifying the to-be-tested wheel pair 100 with faults.

[0061] Optionally, referring to Figures 1 to 3 , the wheel pair bearing fault diagnosis device further includes a first fixing seat 20 and a second fixing seat 30. The two bearings of the test wheel pair 200 are respectively fixed on the first fixing seat 20 and the second fixing seat 30, so that the driving component 3 can drive the axle of the test wheel pair 200 to rotate relative to the wheel pair bearing 101. In this embodiment, both the first fixing seat 20 and the second fixing seat 30 are fixed on the test platform 300. The test platform 300 can be the ground of the test site or a specially erected platform. The bottoms of the first bracket 51 and the second bracket 52 are also fixed on the test platform 300.

[0062] Furthermore, a third fixing seat 40 is also arranged on the test platform 300, and the driving component 3 is installed on the third fixing seat 40. In this embodiment, the driving component 3 is a variable-frequency motor.

[0063] As Figure 4 shown, this embodiment also provides a method for diagnosing faults of wheel pair bearings. Using the wheel pair bearing fault diagnosis device as described above, it specifically includes the following steps:

[0064] S1. Place the wheel set 100 to be measured on the first support assembly 1, and adjust the wheel set 100 to be measured to be centered with the companion wheel set 200;

[0065] S2. Control the loading assembly 2 to load the wheel set bearing 101 of the wheel set 100 to be measured through the control module until the load reaches the preset value, and then stop loading;

[0066] S3. Control the driving assembly 3 to drive the companion wheel set 200 to rotate through the control module, and drive the wheel set 100 to be measured to rotate until the wheel set 100 to be measured reaches the preset rotational speed;

[0067] S4. The detection module measures the vibration information of the wheel set bearing 101 in real time, and transmits the vibration information of the wheel set bearing 101 to the data processing module;

[0068] S5. The data processing module determines whether there is a fault in the wheel set bearing 101 according to the vibration information measured by the detection module.

[0069] In this embodiment, both the control module and the data processing module include corresponding control programs, and the control of the driving assembly 3 and the loading assembly 2 is realized through the control programs, and the fault diagnosis process of the wheel set bearing 101 is completed. The control function of the control module can be realized through the main console or through the sub-control cabinet. Specifically, the main control system of the control module is provided with a console-control and cabinet-control changeover switch. When it is switched to the console-control state, the control right is handed over to the main console, and the control buttons in the sub-control cabinet become ineffective. Similarly, when it is switched to the cabinet-control state, the control right is handed over to the sub-control cabinet, and the control buttons of the main console become ineffective. Among them, the cabinet-control function is mainly used for debugging, and the console-control state is in the normal state.

[0070] In step S1, after the wheel set 100 to be measured is placed on the first fixed track 111 and the second fixed track 121, drive the wheel set 100 to be measured to roll along the first fixed track 111 and the second fixed track 121 onto the first auxiliary track 6 and the second auxiliary track 7, so that the wheel set 100 to be measured is facing the companion wheel set 200, and then drive the ends of the first auxiliary track 6 and the second auxiliary track 7 in contact with the wheel set 100 to descend through the first lifting drive mechanism 8 until the wheel set 100 to be measured contacts the companion wheel set 200, and both the first auxiliary track 6 and the second auxiliary track 7 are separated from the wheel set 100 to be measured.

[0071] In this embodiment, the control module can control the first auxiliary track 6 and the second auxiliary track 7 to stop rotating at the corresponding limits through the first lifting drive mechanism 8, preventing the first auxiliary track 6 and the second auxiliary track 7 from rotating beyond the limit. The first lifting drive mechanism 8 takes a hydraulic cylinder as an example. In the state of console (cabinet) control, if the up button (down button) of the main console (sub-control cabinet) is pressed, the hydraulic rod of the hydraulic cylinder extends (retracts). When the up button (down button) is released or the emergency stop button is pressed, the hydraulic rod of the hydraulic cylinder automatically stops extending (retracting).

[0072] In step S2, when the loading component 2 loads the wheel pair bearing 101, the control module can control the mounting bracket 22 to stop moving at the corresponding limits through the second lifting drive mechanism 21. For example, when at the upper limit, the first lower limit, and the second lower limit, the second lifting drive mechanism 21 will automatically stop moving, preventing the first claw 23 and the second claw 24 from moving beyond the limit. At the same time, in the state of console (cabinet) control, when the down button (up button) of the main console (sub-control cabinet) is pressed, the second lifting drive mechanism 21 drives the mounting bracket 22 to descend (ascend). When the down button (up button) is released or the emergency stop button is pressed, the second lifting drive mechanism 21 will also stop moving. Of course, when the loading load of the loading component 2 reaches the preset value, the second lifting drive mechanism 21 will also automatically stop moving to prevent overloading.

[0073] In step S3, when the rotational speed of the drive component 3 reaches the preset value, it indicates that the rotational speed of the wheel pair 100 to be measured reaches the preset value. The drive component 3 takes a variable-frequency motor as an example. The control module is a computer control system. When adjusting the rotational speed of the variable-frequency motor to the preset value, the rotational speed preset value needs to be set in the computer in advance. This rotational speed preset value is converted into an electrical signal (such as a 4 - 20 mA signal) through the DA module (signal conversion module) in the computer control system and input into the analog input interface of the frequency converter as the rotational speed given signal to achieve the speed regulation function of the variable-frequency motor.

[0074] In this embodiment, the preset value of the loading load of the loading component 2 can also be set by the above method. The second lifting drive mechanism 21 of the loading component 2 takes a hydraulic cylinder as an example. The preset value of the loading load is set in the computer in advance. The preset value of the loading load is converted into a 4 - 20 mA signal through the DA module in the computer control system and input into the electro-hydraulic proportional valve drive board of the hydraulic cylinder. The pressure of the hydraulic cylinder is controlled through the electro-hydraulic proportional valve to achieve the control of the loading load of the hydraulic cylinder.

[0075] In step S4, the first vibration sensor 41 and the second vibration sensor 42 measure the vibration information of the axle bearing 101 in real time at a preset rotational speed of the axle 100 to be measured, and transmit the measured vibration data to the data processing module. The data processing module has a built-in model, and by combining the vibration data and the built-in model, the fault condition of the axle bearing 101 can be judged, and the fault diagnosis of the axle bearing 101 is completed.

[0076] In step S5, after the fault diagnosis of the axle bearing 101 is completed, the drive assembly 3 is controlled to stop by the control module, and the loading assembly 2 is controlled to unload, so as to perform the test on the next axle 100 to be measured or stop the whole system.

[0077] The axle bearing fault diagnosis method provided by this embodiment can quickly measure the fault condition of the axle bearing 101 without disassembling the axle bearing 101, and has high diagnosis efficiency. Moreover, this diagnosis method does not rely on manual experience judgment, does not require a large amount of labor input, can ensure the diagnosis accuracy of the axle bearing 101 while reducing the test cost, and avoid the use of faulty axles, thereby improving the driving safety of freight cars.

[0078] Note that the above is only a preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A wheel set bearing fault diagnosis device, characterized in that, it includes: A first support assembly (1) for supporting the wheel set to be tested (100). A trial wheel set (200) is installed below the first support assembly (1). The wheel rim of the trial wheel set (200) is configured to be able to rollingly cooperate with the tread surface of the wheel set to be tested (100); A loading assembly (2) for loading the wheel set bearing (101) of the wheel set to be tested (100); A driving assembly (3) for driving the trial wheel set (200) to rotate so as to drive the wheel set to be tested (100) to rotate; A detection module for measuring the vibration information of the wheel set bearing (101); A control module which can control the driving assembly (3) to drive the trial wheel set (200) to rotate and control the loading assembly (2) to load the wheel set bearing (101); A data processing module which can judge the fault condition of the wheel set to be tested (100) according to the vibration information measured by the detection module; The first support assembly (1) includes a first support frame (11) and a second support frame (12) arranged at intervals. A first fixed track (111) is arranged on the first support frame (11), and a second fixed track (121) is arranged on the second support frame (12). The two wheels of the wheel set to be tested (100) can respectively rollingly cooperate with the first fixed track (111) and the second fixed track (121); The wheel set bearing fault diagnosis device further includes a first auxiliary track (6) and a second auxiliary track (7). The two wheels of the trial wheel set (200) are respectively located below the first auxiliary track (6) and the second auxiliary track (7). One end of the first auxiliary track (6) is hinged to the first support frame (11), and the other end can be selectively docked with the first fixed track (111). One end of the second auxiliary track (7) is hinged to the second support frame (12), and the other end can be selectively docked with the second fixed track (121); The wheel set bearing fault diagnosis device further includes a first lifting drive mechanism (8) and a cross bar (9) connected to the first lifting drive mechanism (8). One end of the cross bar (9) is connected to the first auxiliary track (6), and the other end is connected to the second auxiliary track (7). The first lifting drive mechanism (8) can drive the cross bar (9) to lift, so as to drive the first auxiliary track (6) and the second auxiliary track (7) to rotate relative to the first support frame (11) and the second support frame (12); When detecting the fault condition of the wheel set bearing (101), first place the wheel set to be tested (100) on the first support assembly (1), and adjust the position of the wheel set to be tested (100) to make it centered with the trial wheel set (200).

2. The wheel set bearing fault diagnosis device according to claim 1, characterized in that, The wheel set bearing fault diagnosis device further includes a second support assembly (5), and the loading assembly (2) is mounted on the second support assembly (5) and is located above the wheel set to be tested (100).

3. The wheel set bearing fault diagnosis device according to claim 2, wherein, the second support assembly (5) includes a first bracket (51), a second bracket (52) and a cross beam (53). The two ends of the cross beam (53) are respectively connected to the first bracket (51) and the second bracket (52). The loading assembly (2) includes a second lifting drive mechanism (21), a mounting frame (22), and a first claw (23) and a second claw (24) respectively disposed at both ends of the mounting frame (22). The first claw (23) and the second claw (24) can respectively hold the corresponding wheel set bearing (101). The second lifting drive mechanism (21) is mounted on the cross beam (53) and is used to drive the mounting frame (22) to lift relative to the cross beam (53), so that the first claw (23) and the second claw (24) load the wheel set bearing (101).

4. The wheel set bearing fault diagnosis device according to claim 3, wherein, the detection module includes a first vibration sensor (41) and a second vibration sensor (42). The first vibration sensor (41) is disposed on the first claw (23), and the second vibration sensor (42) is disposed on the second claw (24).

5. The wheel set bearing fault diagnosis device according to any one of claims 1-4, wherein, the wheel set bearing fault diagnosis device further includes a detection camera (10) electrically connected to the data processing module. The detection camera (10) is used to detect the model of the wheel set to be tested (100).

6. The wheel set bearing fault diagnosis device according to any one of claims 1-4, wherein, the wheel set bearing fault diagnosis device further includes a first fixing seat (20) and a second fixing seat (30). The two bearings of the test wheel set (200) are respectively fixed on the first fixing seat (20) and the second fixing seat (30).

7. A method for diagnosing faults of a wheel set bearing, using the wheel set bearing fault diagnosis device according to any one of claims 1-6, wherein, it includes the following steps: Placing the wheel set to be tested (100) on the first support assembly (1), and adjusting the wheel set to be tested (100) to be centered with the test wheel set (200); Controlling, by the control module, the loading assembly (2) to load the wheel set bearing (101) of the wheel set to be tested (100) until the load is loaded to a preset value, and then stopping the loading; Controlling, by the control module, the drive assembly (3) to drive the test wheel set (200) to rotate and drive the wheel set to be tested (100) to rotate until the wheel set to be tested (100) reaches a preset rotational speed; The detection module measures the vibration information of the axle box bearing (101) in real time and transmits the vibration information of the axle box bearing (101) to the data processing module; The data processing module determines whether there is a fault in the axle box bearing (101) according to the vibration information measured by the detection module.

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