高频轻载自润滑关节轴承加速寿命试验方法  

Test Method for Accelerated Life of High-Frequency Light-Load Self-Lubricating Spherical Plain Bearings

作　　者：董炳武 牛荣军[1] 徐曼君 张文虎 邓四二[1,4,5] DONG Bingwu;NIU Rongjun;XU Manjun;ZHANG Wenhu;DENG Si′er(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China;Beijing Institute of Space Launch,Beijing 100076,China;Postdoctoral Workstation,Changzhou Guangyang Bearing Co.,Ltd.,Changzhou 213001,China;National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Major Machine Manufacturing in Liaoning,Dalian 116024,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]北京航天发射技术研究所,北京100076 [3]常州光洋轴承股份有限公司博士后工作站,江苏常州213001 [4]高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023 [5]辽宁重大装备制造协同创新中心,辽宁大连116024

出　　处：《轴承》2021年第3期21-25,共5页Bearing

摘　　要：为在短时间内获得高频轻载自润滑关节轴承的寿命信息,通过增大载荷的方式建立了加速寿命试验模型,进行了2组恒定应力加速寿命试验。采用韦布尔分布对关节轴承寿命进行描述,并借助最小二乘法对韦布尔分布函数的2个参数进行估算,确定出关节轴承可靠性寿命的相关指标,最终计算出基准载荷下关节轴承的可靠性寿命。数据统计结果表明,关节轴承的寿命服从韦布尔分布,其加速模型符合逆幂律关系,从而验证了在不改变失效机理的前提下对高频轻载自润滑关节轴承进行载荷应力加速寿命试验的可行性,极大地提高了产品寿命的预测效率。In order to obtain life information of high-frequency light-load self-lubricating spherical plain bearings in a short time,an accelerated life test model for is established by increasing load.Two groups of constant stress accelerated life tests are carried out.The Weibull distribution is used to describe life of spherical plain bearings,and two parameters of Weibull distribution function are estimated by least square method to determine relevant indexes of reliability life of spherical plain bearings,and finally calculate reliability life of spherical plain bearings under reference load.The statistical results of data show that the life of spherical plain bearings obeys Weibull distribution,and its acceleration model conforms to inverse power law relationship.The feasibility of load stress accelerated life test for high-frequency light-load self-lubricating plain bearings without changing failure mechanism is verified,and the prediction efficiency of product life is greatly improved.

关 键 词：滑动轴承 自润滑关节轴承 加速寿命试验 可靠性分析 韦布尔分布 

分 类 号：TH133.31[机械工程—机械制造及自动化] TB114.37[理学—概率论与数理统计]