High-frequency vibration test bed for axle-end bearing of double-axle and double-rotation railway vehicle

Abstract

The invention provides a high-frequency vibration test bed for the axle-end bearing of a double-axle and double-rotation railway vehicle. The test bed comprises a framework, a motor, a simulation static load actuator, a vertical actuator, a transverse actuator, simulation wheel shafts and an axle-end axle box. The test bed is characterized in that one simulation wheel shaft is connected with the front end and the rear end of the motor respectively. Each simulation wheel shaft is provided with a wheel-set simulation axle box positioned corresponding to a wheel set and a bearing is arranged inside the wheel-set simulation axle box. The vertical actuator is arranged right below wheel-set simulation axle boxes. Two wheel-set simulation axle boxes, arranged front and back, are connected with each other through longitudinal supporting beams. Two longitudinal supporting beams are movably connected through a transverse supporting beam. The upper part of the transverse supporting beam is movably connected with a framework upper cross beam through a horizontal rotating shaft. According to the invention, the high-speed rotation and high-frequency vibration conditions of a bearing during the movement of the railway vehicle can be truly simulated in a laboratory. More accurate and detailed experimental data can be obtained through transversely and vertically applying a shock excitation. Therefore, the test bed provides more reliable test data for the design production and the maintenance of axle-box bearings.

Description

technical field [0001] The invention relates to a test device for a rail vehicle axle end bearing, in particular to a high-frequency vibration test bench for a double-axis double-rotation axle end bearing. Background technique [0002] High-speed is the development trend of my country's rail transit at this stage, but the increase in the speed of rail vehicles will inevitably put forward stricter requirements for vehicle operation safety. There are many factors that affect the safety of rail vehicles, but the axle box bearing is one of the main factors that affect the safety of rail vehicles. The axle box bearing is not only a key component to support the weight of the car body, but also a key component to convert the motor rotation into translational motion of the rail vehicle. It bears static and dynamic radial loads and is subject to additional unsteady stress in the axial direction. Therefore, the axle box Bearings are the most vulnerable components on a train. Accordi...

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Problems solved by technology

At present, the bearing test of domestic bearing manufacturers is still only based on the bench test according to the EN12082 standard, and it is still unable to simulate the actual situation of the line operation to carry out the research test of the bearing.

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