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A fretting damage test device for the interference fit surface of a train wheelset

A technology of interference fit and test device, applied in the direction of railway vehicle testing, etc., can solve the problem of fretting damage test equipment being blank and so on

Active Publication Date: 2020-05-22
合肥龙智机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fretting damage testing equipment for the interference fit surface of the train axle is still blank in the prior art

Method used

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  • A fretting damage test device for the interference fit surface of a train wheelset
  • A fretting damage test device for the interference fit surface of a train wheelset
  • A fretting damage test device for the interference fit surface of a train wheelset

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The purpose of the present invention is to provide a fretting damage testing device for the interference fit surface of the train wheel set, so as to solve the above-mentioned problems in the prior art, so that the device can test the fretting wear state of the surface of the train wheel set interference fit surface .

[0031] In order to make the above objects, features and advantages of the present invention more comprehensible, the pres...

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Abstract

The invention discloses a fretting damage testing device for interference fit surfaces of train wheel sets. The device comprises a testing unit, a driving unit and a braking unit, wherein the testingunit comprises a wheel, a wheel axle, a steel rail wheel, a steel rail shaft and a bearing seat; the wheel is connected with the wheel axle; and the wheel and the wheel axle are in interference fit. During testing, the wheel is abutted against the steel rail wheel, which is equivalent to the rolling contact between a train wheel set and a rail; a radial load (i.e. an axle load) is loaded onto thewheel axle through a loading disc to simulate an actual Load and a motor and a magnetic powder brake are started to simulate actual working conditions of train acceleration and deceleration; after thesimulation is finished, an expansion ring is removed to serve as a test sample; and the surface topography and the surface crack state of the interference fit surface of the train wheel set under different working conditions are analyzed to obtain the surface fretting wear state and the surface fretting fatigue crack initiating and expanding mechanism.

Description

technical field [0001] The invention relates to the technical field of testing the service performance of a train wheel set, in particular to a fretting damage testing device for an interference fit surface of a train wheel set. Background technique [0002] An axle is a machine consisting of a wheel and a shaft that can rotate around a common axis. The fit of train axles is a typical interference fit. When a high-speed and heavy-duty train is decelerated by tread braking during operation, the wheelset not only bears the axle load, but also bears the resistance moment on the contact tread of the wheel and rail. Therefore, the axle, wheel seat and hub Under the combined action of bending moment and torque, the mating surface of the hole will produce more significant circumferential fretting slippage and axial fretting slippage than the steady-state operating state, which will cause fretting wear and fretting fatigue of the interference fit surface. Damage, the fretting damag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/10
CPCG01M17/10
Inventor 宋剑锋董永刚焦朝旭李小龙王庭轩程颢王兆丰
Owner 合肥龙智机电科技有限公司