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Bending fretting fatigue test device for dropper of high-speed railway catenary

A high-speed railway, fretting fatigue technology, applied in measuring devices, using repetitive force/pulse force to test material strength, instruments, etc., can solve the problem that there is no tailor-made test equipment for hanging string bending fretting fatigue test, etc. Achieve the effect of ensuring reliability, overcoming single test conditions and good stability

Pending Publication Date: 2019-02-19
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

At present, there is no test equipment specially tailored for suspension string bending fretting fatigue test

Method used

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  • Bending fretting fatigue test device for dropper of high-speed railway catenary

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Embodiment Construction

[0023] 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, not all, embodiments of the present invention. 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.

[0024] The object of the present invention is to provide a high-speed railway catenary suspension string bending fretting fatigue test device to solve the problems in the prior art. The test device is simple and easy to operate, and can realize various working conditions and various specifications of suspension strings The unique bending fretting fatigue test has high measurement and control precision and more reliable data.

[0025] Based on this, the high-sp...

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Abstract

The invention discloses a bending fretting fatigue test device for a dropper of a high-speed railway catenary, which comprises a dropper fixing end, a force compensating end, a fatigue load loading part and a data acquisition and processing unit. One end of a dropper sample is fixed on a support of the fixing end, and the other end is fixed on a support of the force compensating end. A pre-tightening force is applied to the dropper by a force compensating spring. The middle part of the dropper is connected to a fatigue test machine through a loading rod. During the whole test, the bending fretting fatigue test of the dropper with variable parameters and multiple working conditions is carried out by controlling the fatigue test machine after the pressure of the fixing end and the pre-tightening force of the dropper are set.

Description

technical field [0001] The invention relates to the technical field of suspension string fatigue testing of railway pantograph-catenary system, in particular to a high-speed railway catenary suspension string bending fretting fatigue test device. Background technique [0002] Fretting fatigue refers to the relative motion with extremely small amplitude between the contact surfaces of two contacting workpieces under the action of various alternating loads such as mechanical vibration, fatigue load, electromagnetic vibration or thermal cycle, which causes high stress concentration and Abrasive fatigue behavior. It widely exists in fastening and fitting components in aerospace, automobile, machinery, railway, electric power, nuclear reactor, bridge, biomedicine and other fields, and is the main cause of failure of many key components. [0003] In the past ten years, with the rapid development of economy and society, China's high-speed railway has developed by leaps and bounds,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0067G01N2203/0073
Inventor 彭金方朱旻昊刘曦洋贺继樊蔡振兵刘建华莫继良张林
Owner SOUTHWEST JIAOTONG UNIV
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