High-speed EMU axle end grounding device wear test bench

Abstract

The invention relates to a wear test bench for a shaft end grounding device of a high-speed EMU (electric multiple unit) train. The wear test bench comprises a test bench, a constant current source, an electric control cabinet and an industrial control computer. The test bench adopts a manual loading mode to simulate train weight borne by bearings, a wear test of the shaft end grounding device is performed during steady-state loading of the bearings, furthermore, the loading process is visible and controllable, multiple train weights can be simulated, and realness and practicability of the test bench are improved; meanwhile, all that is required is to apply very small force when the test bench is used, very large loading force can be obtained, the rotating speed and the current working conditions in an actual path can further be accurately simulated, and test data are real and accurate; when the test bench is used for the test, the measuring train speed completely meets requirements of the wear test of the shaft end grounding device of the high-speed EMU train which is put into operation or is under development in China, accordingly, the wear test bench has a good promoting function in the aspects of improvement of integrated technical level of the high-speed EMU train and guarantee of safe operation, and good social and economic benefits are produced.

Description

technical field [0001] The invention relates to a wear test bench for a shaft end grounding device of a rail vehicle, in particular to a wear test bench for a shaft end grounding device when a bearing of a high-speed EMU is under steady loading. Background technique [0002] As the main artery of the national economy, the railway is an important symbol to measure a country's infrastructure level and transportation capacity. High-speed EMUs are one of the core technologies of high-speed railways. Under the premise of ensuring operational safety, in order to further improve the operation quality of my country's high-speed railways, it is urgent to improve the overall technical level of high-speed EMUs. [0003] The high-speed EMU receives current from the catenary through the pantograph. The current flows through the electrical equipment, then flows into the rail through the grounding system, and enters the ground through the integrated ground wire, and returns the current to ...

AI Technical Summary

Problems solved by technology

However, the wear test of the shaft end grounding device is a destructive test, and only when the shaft end grounding device is operating at high speed can the damage and its cause be diagnosed

However, the existing test benches for wear tests of axle-end grounding devices of rail vehicles cannot simulate the high-speed operating conditions during actual operation. Therefore, it is urgent to develop a device for simulating the wear test of axle-end grounding devices under steady-state loading of high-speed EMU bearings.

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