聚脲润滑脂稠化剂对球轴承疲劳寿命的影响  

Effect of Polyurea Grease Thickeners on Fatigue Life of Ball Bearings

作　　者：冯强[1,2] 任成祖[1] 吴宝杰[2] 陈治 刘建龙[2] FENG Qiang;REN Chengzu;WU Baojie;CHEN Zhi;LIU Jianlong(School of Mechanical Engineering,Tianjin University,Tianjin 300072,China;Grease Branch,Sinopec Lubricant Co.,Ltd.,Tianjin 300480,China)

机构地区：[1]天津大学机械工程学院,天津300072 [2]中国石化润滑油有限公司润滑脂分公司,天津300480

出　　处：《轴承》2024年第5期138-145,共8页Bearing

摘　　要：采用光干涉法、动态击穿电压测试对3种聚脲润滑脂样品润滑膜厚进行了表征,同时测试了3种样品的轴承疲劳寿命和温升特性,对比研究了聚脲润滑脂稠化剂对润滑状态的影响,结果表明:聚脲润滑脂稠化剂在摩擦副表面吸附形成垫层,阻碍了润滑脂乏油润滑引起的润滑膜厚持续减小;聚脲润滑脂稠化剂的类型、含量对表面起源型剥落的轴承疲劳寿命有显著影响,合理的稠化剂配方可显著延长轴承疲劳寿命,这可能与聚脲润滑脂稠化剂的回流特性相关。The lubricating film thickness of three polyurea grease samples is characterized using optical interference method and dynamic breakdown voltage test.At the same time,the fatigue life and temperature rise characteristics of bearings filled with three samples are tested,and the effect of polyurea grease thickeners on lubrication state is compared and studied.The results show that the thickeners adsorb on surface of friction pair to form a cushion,which hinders the continuous reduction of lubricating film thickness caused by starved-oil lubrication of the greases;the type and content of the thickeners have a significant impact on fatigue life of bearings with surface originated flaking.A reasonable formula of thickeners can significantly prolong the fatigue life of bearings,which may be related to reflux characteristics of the thickeners.

关 键 词：滚动轴承 深沟球轴承 聚脲润滑脂 润滑脂稠化剂 疲劳寿命 

分 类 号：TH133.331[机械工程—机械制造及自动化] TH117.2