Failure evaluation method for bearing material under unsteady state lubrication
A bearing material and failure assessment technology, applied in the direction of analyzing materials, mechanical bearing testing, measuring devices, etc., can solve problems such as bearing wear
Pending Publication Date: 2021-09-14
HENAN UNIV OF SCI & TECH
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[0004] The purpose of the present invention is to provide a method for evaluating the failure of bearing materials under unsteady lubrication, so as to solve the problem that the failure of bearing materials under unsteady lubrication can not be found in time and cause serious bearing wear
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[0034] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0035] The present invention finds through experiments on bearing materials that from normal lubrication to lubrication failure, the bearing material must undergo a sudden change in the friction coefficient, and the change rate of the friction coefficient represents the stability of the bearing friction coefficient (bearing operation). Therefore, the present invention selects the sudden change of the friction coefficient change rate and the sudden change time of the friction coefficient change rate as indicators for evaluating the failure of the bearing material under unsteady lubrication. The maximum value of the change rate of the friction coefficient, and the change time of the change rate refers to the time elapsed from the change rate of the friction coefficient of the bearing to the change rate of the friction coefficient change rate fr...
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The invention relates to a failure evaluation method for a bearing material under unsteady state lubrication, and belongs to the technical field of bearing material detection. According to the method, the abrupt change quantity of the friction coefficient change rate and the abrupt change time of the friction coefficient change rate are selected as evaluation indexes for evaluating the lubrication failure of the bearing material, when the bearing is poor in lubrication, the friction coefficient of the bearing in the service process is detected in real time, and the obtained friction coefficient change rate is compared with the abrupt change quantity of the friction coefficient change rate; and whether lubrication of the bearing material fails or not is judged according to the comparison result, wherein the abrupt change quantity of the friction coefficient change rate is related to the bearing material and the working condition. Through the evaluation mode, the bearing lubrication failure can be accurately and timely found, and safety accidents caused by long-time lubrication failure are avoided.
Description
technical field [0001] The invention relates to a failure evaluation method for bearing materials under unsteady state lubrication, and belongs to the technical field of bearing material detection. Background technique [0002] Bearings are the core basic components in the field of equipment manufacturing. The bearing industry is a national basic strategic industry, which plays an important supporting role in the development of the national economy and national defense construction. During the service of the bearing, as the working conditions change, there will often be unsteady lubrication conditions under conditions such as rapid acceleration / deceleration, high speed / variable load, high temperature / low temperature, and lack of oil. The high friction contact area of the bearing will generate high temperature, High stress leads to the transformation of bearing material structure, including austenite and martensite transformation, carbide decomposition, precipitation, grain...
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IPC IPC(8): G01N19/02G01M13/04
CPCG01N19/02G01M13/04
Inventor 贺甜甜张永振杜三明刘建傅丽华岳赟逄显娟郑晓猛
Owner HENAN UNIV OF SCI & TECH