Railway train gear box transmission traction motor bearing test device

Abstract

The utility model discloses a railway train gear box transmission traction motor bearing test device, including test board, test main shaft and radial loading device and axial loading device, oil bath device, the bearing of waiting for testing and accompanying test bearing are equipped in proper order on the test board, and the test main shaft rotatable setting is in the top of test board, and passes through oil bath device, the bearing of waiting for testing and accompanying test bearing and is connected with axial loading device after, and the load of radial loading device is loaded on accompanying test bearing. The utility model has the beneficial effect that through the integration radial and axial loading device, can simulate bearing actual work stress state, promotes the test accuracy, and the cooperation design of oil bath device and test main shaft can realize the accurate control of bearing lubrication condition, guarantees the test reliability, and the overall structure layout is compact, and the installation debugging and maintenance are convenient, and are suitable for the performance test of various models bearings.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for traction motor bearings of railway trains, and more specifically to a testing device for traction motor bearings of railway train gearbox transmissions. Background Technology

[0002] Currently, many high-speed rail axle box bearing tests are conducted using static loading methods. However, high-speed rail experiences varying loads during station entry and exit, high-speed straight runs, curves, junctions, and depot entry and exit, and the external environment changes significantly during operation. These factors are not considered in traditional testing, resulting in many products passing testing but failing to meet requirements during actual installation. Against this backdrop, developing a new generation of dynamic performance testing equipment to fully simulate high-speed rail operating conditions is crucial. Therefore, testing needs to verify various performance indicators and service life of traction motor bearings, verify whether bearings can reach their specified service life under actual or enhanced operating conditions, and assess temperature changes during operation, as well as the impact of different lubricants on traction motor bearings. However, current technology lacks equipment capable of simultaneously performing all of these tests. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a test device for the bearings of traction motors in railway train gearbox transmissions, which solves the problem that traditional static testing cannot reproduce actual operating conditions through dynamic loading and multi-condition simulation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: including a test bench, a test spindle, a radial loading device, and an axial loading device. The test bench is sequentially provided with an oil bath device, a bearing to be tested, and a test bearing. The test spindle is rotatably mounted above the test bench and passes through the oil bath device, the bearing to be tested, and the test bearing before connecting to the axial loading device. The load of the radial loading device is applied to the test bearing.

[0005] As a further improvement of this utility model, the oil bath device includes an oil bath shell and an indicator tube. The test spindle passes through the oil bath shell. A mounting base is fixed to the lower side of the oil bath shell. The mounting base is fixed to the test bench by bolts. A window is opened on the mounting base. One end of the indicator tube is fixed to the upper side of the oil bath shell, and the other end is bent, extended downward, bent again, and inserted into the window and fixed to the lower side of the oil bath shell. The indicator tube is a transparent tube.

[0006] As a further improvement of this utility model, the radial loading device includes a first loading cylinder and a second loading cylinder. Two bearings are provided for both the bearing to be tested and the accompanying bearings. They are arranged along the length of the test spindle in the order of bearing to be tested - accompanying bearing - bearing to be tested - accompanying bearing. A gantry frame is provided above the test bench. The first loading cylinder and the second loading cylinder are installed on the gantry frame at intervals. The loading rods of the first loading cylinder and the second loading cylinder pass downward through the gantry frame and are respectively connected to the two accompanying bearings.

[0007] As a further improvement of this utility model, the lower ends of the first loading cylinder and the second loading cylinder are both fixed with loading gantry frames, and the two ends of the loading gantry frames are connected to the outer ring of the test bearing by pins.

[0008] As a further improvement of this utility model, both the bearing to be tested and the supporting bearing are fitted with test sleeves, and the test sleeves are provided with radially extending temperature measuring holes and axially extending grease filling holes.

[0009] As a further improvement of this utility model, the upper side of the gantry frame is provided with a first track and a second track, the lower end of the cylinder body of the first loading cylinder is fixed with a first mounting seat, the lower end of the cylinder body of the second loading cylinder is fixed with a second mounting seat, and the first mounting seat and the second mounting seat are respectively slidably mounted on the first track and the second track.

[0010] As a further improvement of this utility model, the first mounting base includes a mounting body, a cylinder seat, and an I-shaped slider. The I-shaped slider is fixed on the lower side of the mounting body. An I-shaped groove is provided in the first track. The I-shaped slider and the I-shaped groove cooperate with each other. The cylinder body of the first loading cylinder is fixedly mounted on the cylinder seat. A connecting groove is provided on the cylinder seat. A connecting plate is provided on the mounting body. The connecting plate is inserted into the connecting groove. After passing through the connecting groove and the connecting plate by a swing pin, it is mounted on the groove wall of the connecting groove.

[0011] The beneficial effects of this invention are as follows: by setting up a test bench, test spindle, radial loading device, and axial loading device, dynamic loading tests on traction motor bearings are realized. This can simulate the load changes of high-speed trains under different operating conditions, solving the problem that traditional static loading tests cannot reproduce actual operating conditions, and improving the accuracy and reliability of test results. The transparent indicator tube of the oil bath device facilitates observation of the oil level; the dual loading cylinder design of the radial loading device enables simultaneous loading of multiple bearings; the temperature measuring hole and grease replenishment hole of the test sleeve facilitate real-time temperature monitoring and grease replenishment; and the track design of the gantry allows for adjustment of the loading cylinder position to adapt to the testing needs of bearings of different specifications. Attached Figure Description

[0012] Figure 1This is an overall structural diagram of the railway train gearbox transmission traction motor bearing test device of this utility model; Figure 2 for Figure 1 Internal structure diagram of the test spindle section. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0014] Reference Figure 1 As shown, this embodiment includes a test bench 1, a test spindle 2, a radial loading device 3, and an axial loading device 9. The test bench 1 is sequentially equipped with an oil bath device 4, a bearing to be tested 5, and a test bearing 6. The test spindle 2 is rotatably mounted above the test bench 1 and passes through the oil bath device 4, the bearing to be tested 5, and the test bearing 6 before connecting to the axial loading device 9. The load of the radial loading device 3 is applied to the test bearing 6. The rotation of the test spindle 2 simulates the bearing's operating state, and the radial and axial loading devices apply dynamic loads to simulate different working conditions such as high-speed rail entering and leaving stations and curves. The oil bath device 4 provides a lubrication environment, solving the problem that traditional static testing cannot simulate actual working conditions.

[0015] Furthermore, refer to Figure 1 As shown, the oil bath device 4 includes an oil bath housing 41 and an indicator tube 42. The test spindle 2 passes through the oil bath housing 41. A mounting base is fixed to the lower side of the oil bath housing 41, and the mounting base is fixed to the test bench 1 by bolts. A window is provided on the mounting base. One end of the indicator tube 42 is fixed to the upper side of the oil bath housing 41, and the other end is bent, extended downwards, bent again, and inserted into the window and fixed to the lower side of the oil bath housing 41. The indicator tube 42 is a transparent tube. The transparent indicator tube 42 allows for real-time observation of oil level changes, ensuring sufficient bearing lubrication and improving the reliability of the test.

[0016] Furthermore, refer to Figure 1 As shown, the radial loading device 3 includes a first loading cylinder 31 and a second loading cylinder 32. Two of each of the bearing to be tested 5 and the accompanying bearing 6 are provided, arranged along the length of the test spindle 2 in a sequence of bearing to be tested 5-accompanying bearing 6-bearing to be tested 5-accompanying bearing 6. A gantry frame 7 is provided above the test bench 1. The first loading cylinder 31 and the second loading cylinder 32 are installed alternately on the gantry frame 7. The loading rods of the first loading cylinder 31 and the second loading cylinder 32 pass downwards through the gantry frame 7 and are respectively connected to the two accompanying bearings 6. The dual loading cylinder design enables synchronous loading of multiple bearings, simulating the composite load in actual operation and improving testing efficiency.

[0017] Furthermore, refer to Figure 1As shown, a loading gantry 33 is fixed to the lower end of both the first loading cylinder 31 and the second loading cylinder 32. The two ends of the loading gantry 33 are connected to the outer ring of the test bearing 6 by pins. The pin connection method ensures stable transmission of loading force, and the rigid structure of the loading gantry 33 avoids deformation during the loading process from affecting the test accuracy.

[0018] Furthermore, refer to Figure 2 As shown, both the bearing to be tested 5 and the supporting bearing 6 are fitted with test sleeves 8. The test sleeves 8 have radially extending temperature measuring holes and axially extending grease filling holes. The temperature measuring holes allow for the insertion of temperature sensors to monitor bearing temperature changes in real time, while the grease filling holes facilitate the replenishment of grease during the test, extending the test duration.

[0019] Furthermore, refer to Figure 1 As shown, the upper side of the gantry 7 is provided with a first track 71 and a second track 72. The lower end of the cylinder body of the first loading cylinder 31 is fixed with a first mounting seat 311, and the lower end of the cylinder body of the second loading cylinder 32 is fixed with a second mounting seat 321. The first mounting seat 311 and the second mounting seat 321 are respectively slidably mounted on the first track 71 and the second track 72. The track design allows the loading cylinder to adjust its position along the main shaft direction to adapt to the bearing testing requirements of different shaft spacings.

[0020] Furthermore, refer to Figure 1 As shown, the first mounting base 311 includes a mounting body 3111, a cylinder seat 3112, and an I-shaped slider. The I-shaped slider is fixed to the lower side of the mounting body 3111. An I-shaped groove is formed in the first track 71, and the I-shaped slider cooperates with the I-shaped groove. The cylinder body of the first loading cylinder 31 is fixedly mounted on the cylinder seat 3112. A connecting groove is formed on the cylinder seat 3112, and a connecting plate is provided on the mounting body 311. The connecting plate is inserted into the connecting groove, and a swing pin 3113 passes through the connecting groove and the connecting plate and is mounted on the groove wall of the connecting groove. The cooperation between the I-shaped slider and the groove ensures smooth movement of the mounting base, and the swing pin connection allows the loading cylinder to adjust its angle slightly during loading, avoiding uneven loading force that could affect the test results.

[0021] In summary, this utility model, through a dynamic loading system, a multi-bearing arrangement structure, and an adjustable loading mechanism, enables performance testing of railway train traction motor bearings under simulated actual operating conditions. It solves the problem of the disconnect between traditional static testing and actual operating conditions, improves the accuracy of bearing life assessment and performance verification, and provides a reliable testing platform for the research and development and quality control of high-speed rail bearings.

[0022] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A test device for bearings of a traction motor in a railway train gearbox transmission, characterized in that: The test bench includes a test spindle (2), a radial loading device (3), and an axial loading device (9). The test bench (1) is provided with an oil bath device (4), a bearing to be tested (5), and a test bearing (6) in sequence. The test spindle (2) is rotatably set above the test bench (1) and passes through the oil bath device (4), the bearing to be tested (5), and the test bearing (6) before connecting to the axial loading device (9). The load of the radial loading device (3) is applied to the test bearing (6).

2. The test device for bearings of railway train gearbox transmission traction motors according to claim 1, characterized in that: The oil bath device (4) includes an oil bath housing (41) and an indicator tube (42). The test spindle (2) passes through the oil bath housing (41). A mounting base is fixed to the lower side of the oil bath housing (41). The mounting base is fixed to the test bench (1) by bolts. A window is opened on the mounting base. One end of the indicator tube (42) is fixed to the upper side of the oil bath housing (41), and the other end is bent, extended downward, bent again, and inserted into the window and fixed to the lower side of the oil bath housing (41). The indicator tube (42) is a transparent tube.

3. The test device for bearings of railway train gearbox transmission traction motors according to claim 1 or 2, characterized in that: The radial loading device (3) includes a first loading cylinder (31) and a second loading cylinder (32). The test bearing (5) and the accompanying bearing (6) are provided in twos. They are arranged along the length of the test spindle (2) in the order of test bearing (5) - accompanying bearing (6) - test bearing (5) - accompanying bearing (6). A gantry frame (7) is provided above the test bench (1). The first loading cylinder (31) and the second loading cylinder (32) are installed on the gantry frame (7) at intervals. The loading rods of the first loading cylinder (31) and the second loading cylinder (32) pass down through the gantry frame (7) and are connected to the two accompanying bearings (6) respectively.

4. The test device for bearings of railway train gearbox transmission traction motors according to claim 3, characterized in that: The lower ends of the first loading cylinder (31) and the second loading cylinder (32) are both fixed with loading gantry (33), and the two ends of the loading gantry (33) are connected to the outer ring of the test bearing (6) by pins.

5. The test device for bearings of railway train gearbox transmission traction motors according to claim 4, characterized in that: Both the bearing to be tested (5) and the bearing to be tested (6) are fitted with test sleeves (8), and the test sleeves (8) are provided with radially extending temperature measuring holes and axially extending grease filling holes.

6. The test device for bearings of railway train gearbox transmission traction motors according to claim 3, characterized in that: The upper side of the gantry (7) is provided with a first track (71) and a second track (72). The lower end of the cylinder body of the first loading cylinder (31) is fixed with a first mounting seat (311), and the lower end of the cylinder body of the second loading cylinder (32) is fixed with a second mounting seat (321). The first mounting seat (311) and the second mounting seat (321) are respectively slidably mounted on the first track (71) and the second track (72).

7. The test device for bearings of railway train gearbox transmission traction motors according to claim 6, characterized in that: The first mounting base (311) includes a mounting body (3111), a cylinder seat (3112), and an I-shaped slider. The I-shaped slider is fixed on the lower side of the mounting body (3111). An I-shaped groove is provided in the first track (71). The I-shaped slider and the I-shaped groove cooperate with each other. The cylinder body of the first loading cylinder (31) is fixedly mounted on the cylinder seat (3112). A connecting groove is provided on the cylinder seat (3112). A connecting plate is provided on the mounting body (3111). The connecting plate is inserted into the connecting groove. After passing through the connecting groove and the connecting plate by the swing pin (3113), it is mounted on the groove wall of the connecting groove.

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