宽内圈关节轴承径向极限承载破裂失效原因  

Crack failure reasons in extended inner ring of spherical plain bearings under radial limit loading

作　　者：林志埙 

机构地区：[1]福建龙溪轴承(集团)股份有限公司,福建漳州363000 [2]福建省关节轴承企业重点实验室,福建漳州363000

出　　处：《计算机辅助工程》2017年第6期71-75,共5页Computer Aided Engineering

基　　金：国家科技支撑计划(2014BAF08B03)

摘　　要：对端部有台阶(宽内圈)和无台阶(窄内圈)关节轴承施加相同的径向极限载荷时,宽内圈端部台阶发生破裂失效现象,而窄内圈却完好无损。为分析台阶破裂原因,采用有限元方法对2种内圈结构进行径向极限承载分析,从位移、等效应力和主应力等3个方面分别描述两者之间的区别。结果表明:宽内圈端部台阶的局部应力集中部位最大等效应力值较小,但是该部位的变形量较大;第一主应力呈拉应力状态且其数值已超过材料的屈服强度,是造成宽内圈开裂的主要原因。When the same radial limit loading is applied to the extended bearings with step at the end and the narrow one without step , crack failure occurs on the extended inner ring with step at the end # while the narrow one remains intact . In order to analyze the reasons for the crack of step , the finite element metliod analysis is carried out on the condition that tlie two kinds of inner ring structure are performed under the radial limit loading # and the differences between them are described in three aspects including displacement ,equivalent stress , and principal stress . The resultsindicate that there is a smaller maximum equivalent stress at the local stress concentration place of theextended inner ring with step at the end ,but there is a larger deformatiprincipal stress acts as tensile stress and its value exceeds the yield strength of the material ,which is themain reason for t!ie crack on the extended ring .

关 键 词：宽内圈 径向静载 破裂失效 等效应力 主应力 变形 轴承 

分 类 号：TH133.33[机械工程—机械制造及自动化]