Metal friction pair surface roughness prediction method based on micro-convex body contact theory

Abstract

The invention discloses a metal friction pair surface roughness prediction method based on a micro-bulge contact theory, and the method comprises the steps: determining a tribology system load representation parameter corresponding to a metal friction pair according to the lubrication condition and material of the metal friction pair; based on the determined tribological system load characterization parameters, predicting and calculating the surface roughness of the metal friction pair in the abrasion process in real time through a surface roughness calculation formula of the metal friction pair. According to the method for predicting the surface roughness of the metal friction pair based on the micro-bulge contact theory, the surface roughness of the metal friction pair can be accuratelypredicted and calculated in the abrasion process of the metal friction pair, and a data basis is provided for accurate calculation of the abrasion state of the metal friction pair; and the accuracy and reliability of the prediction result of the wear state of the friction pair are obviously improved.

Description

technical field [0001] The invention relates to the technical field of metal friction pairs, in particular to a method for predicting the surface roughness of metal friction pairs based on asperity contact theory. Background technique [0002] Among the metal friction pairs of existing mechanical equipment, the working condition indicators of the metal friction pairs are not stable most of the time. When the equipment power index fluctuates greatly, the friction pairs are under dynamic load conditions, such as clutches, cylinder liners - Metal friction pairs in typical mechanical equipment such as piston rings, crankshaft-bearing bushes, and bearings. When the friction pair is under dynamic load conditions, the dynamic load will easily cause dynamic changes in the contact pressure, relative speed, temperature and other parameters between the friction pairs, which will cause the lubricating oil film to be squeezed and ruptured, the bearing capacity will decrease, and the wear...

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Problems solved by technology

However, according to the principle of dynamic running-in, the change of the parameters of the tribological system will have a significant impact on the wear rate. When only the shear characteristics of the friction pair material are considered, the lubrication state of the friction pair and the relative velocity and contact pressure changes of the friction pair are not considered. In the case of influence, there are great limitations in predicting the wear state, and the accuracy of the prediction results of the wear state of the friction pair is also poor

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