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空心轴的干涉配合装配与微动磨损分析

Interference assembly and fretting wear analysis of hollow shaft.

作者信息

Han Chuanjun, Zhang Jie

机构信息

School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China.

出版信息

ScientificWorldJournal. 2014;2014:919518. doi: 10.1155/2014/919518. Epub 2014 May 12.

DOI:10.1155/2014/919518
PMID:24955422
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4052619/
Abstract

Fretting damage phenomenon often appears in the interference fit assembly. The finite element model of hollow shaft and shaft sleeve was established, and the equivalent stress and contact stress were computed after interference assembly. The assembly body of hollow shaft and shaft sleeve was in whirling bending load, and the contact status (sticking, sliding, and opening) and the distribution of stress along one typical contact line were computed under different loads, interferences, hollow degrees, friction coefficient, and wear quantity. Judgment formula of contact state was fixed by introducing the corrected coefficient k. The computation results showed that the "edge effect" appears in the contact surface after interference fit. The size of slip zone is unchanged along with the increase of bending load. The greater the interference value, the bigger the wear range. The hollow degree does not influence the size of stick zone but controls the position of the junction point of slip-open. Tangential contact stress increases with the friction coefficient, which has a little effect on normal contact stress. The relationship between open size and wear capacity is approximately linear.

摘要

微动损伤现象经常出现在过盈配合装配中。建立了空心轴与轴套的有限元模型，并在过盈装配后计算了等效应力和接触应力。空心轴与轴套的装配体承受旋转弯曲载荷，计算了不同载荷、过盈量、空心度、摩擦系数和磨损量下的接触状态（粘着、滑动和分离）以及沿一条典型接触线的应力分布。通过引入修正系数k确定了接触状态的判定公式。计算结果表明，过盈配合后接触表面出现“边缘效应”。随着弯曲载荷的增加，滑动区尺寸不变。过盈值越大，磨损范围越大。空心度不影响粘着区的大小，但控制滑动-分离交界点的位置。切向接触应力随摩擦系数的增大而增大，对法向接触应力影响较小。分离尺寸与磨损量之间的关系近似呈线性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b087/4052619/b2f651576687/TSWJ2014-919518.015.jpg
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