Proportional test device for rotating bending fatigue of train wheel axle

Abstract

The invention relates to a proportional test device for the rotating bending fatigue of a train wheel axle. A base is provided with an electric spindle controlled by a data acquisition and control system; the electric spindle is connected with a spring collet through a coupler and an axle box filled with cooling oil; the spring collet clamps the axle of a wheel axle sample; a rotating speed sensor and a revolution sensor are arranged beside the coupler; the wheel of the wheel axle sample is contacted with a driven wheel below; the axle of the driven wheel is arranged on a driven wheel bracket; a guide sleeve of the driven wheel bracket is sleeved on a guide pillar of a sensor base; a threaded hole of a pressure sensor of the sensor base is connected with an adjusting upright post; the upper end of the adjusting upright post is contacted with the lower surface of a bottom plate of the driven wheel bracket; and the middle part of the adjusting upright post is provided with a self-locking threaded ring. The test device can conveniently simulate the rotating bending fatigue damage of the train wheel axle under the action of a complex alternating load so as to provide a more reliable and accurate test basis for improving the fatigue damage resistance of the wheel axle and better protecting the wheel axle.

Description

technical field [0001] The invention relates to the technical field of rail transportation, in particular to a proportional test device for rotational bending fatigue of train axles. Background technique [0002] Fatigue phenomenon widely exists in aviation, aerospace, machinery, transportation, electric power and other fields, and it is one of the main forms of metal component fracture. The earliest fatigue problems that attracted people's attention can be traced back to the failure of railway locomotives, rails, and metal bridges in the 1920s. With the development of science and technology, the importance of fatigue strength is becoming more and more prominent. A series of catastrophic aircraft accidents, train derailment accidents, and nuclear power plant explosion accidents have been found to be caused by fatigue damage after investigation. Up to now, the problem of fatigue failure has always been an important factor related to safety and economy in many engineering fi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the existing fatigue testing machine cannot simulate the actual working conditions of the train axle and carry out the fatigue damage test, and provide a proportional test device for the rotational bending fatigue of the train axle. Under the action of rotating bending fatigue damage under complex alternating loads, the fatigue life and fatigue strength of the train axle under the action of rotating bending are obtained; in order to improve the anti-fatigue damage performance of the wheel axle, better protect the wheel axle and improve the use of high-speed train axles Life and safety of vehicle operation, providing more reliable and accurate test basis

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