结构和材料参数对旋转轴唇形密封可靠性影响  

Influence of Structural and Material Parameters on the Reliability of Rotary Shaft Lip Seal

作　　者：韩兆 张付英[1,2] 吴继豪 杨朋伟 HAN Zhao;ZHANG Fuying;WU Jihao;YANG Pengwei(College of Mechanical Engineering,Tianjin University of Science&Technology,Tianjin 300222,China;Key Laboratory of Integrated Design and On Line Monitoring of Light Industry and Food Engineering Machinery and Equipment in Tianjin,Tianjin 300222,China)

机构地区：[1]天津科技大学机械工程学院,天津300222 [2]天津市轻工与食品工程机械装备集成设计与在线监控重点实验室,天津300222

出　　处：《润滑与密封》2024年第7期153-160,共8页Lubrication Engineering

基　　金：科技部创新方法工作专项(2019IM020300)。

摘　　要：基于流量因子统计学方法建立油封密封区域的混合润滑数值模型,利用有限元软件进行求解,分析结构和材料参数对油封密封可靠性的影响规律。结果表明:在研究的参数范围内,静态密封可靠性随腰厚、腰长、空气侧唇角、弹簧的弹性模量、橡胶硬度的增加而提高,随过盈量、油侧角和理论接触宽度的增大而减小;当过盈量为0.4~0.55 mmm、理论接触宽度为0.3~0.6 mm、油侧角为35°~50°、空气侧唇角为15°~30°、腰厚为1.0~1.3 mm、腰长为0.9~1.2 mm、弹簧模量为1 175~1 250 MPa,橡胶硬度为70HA~85HA时有利于油封可靠性的提高,且在此取值范围内,动态密封可靠性随过盈量、油侧唇角、橡胶材料硬度、腰厚和理论接触宽度的增加而增大,随弹簧弹性模量、腰长、空气侧唇角的增大而减小。A mixed lubrication numerical model of the oil seal sealing area was established using flow factor statistical methods.The finite element software was used to solve the model,and the influence of structural and material parameters on the reliability of oil seal was analyzed.The results show that within the range of parameters studied,the reliability of static sealing increases with the increase of waist thickness,waist length,air side lip angle,spring elastic modulus,and rubber hardness,but decreases with the increase of interference,oil side angle,and theoretical contact width.When the interference is 0.4 mm to 0.55 mm,the theoretical contact width is 0.3 mm to 0.6 mm,the oil side angle is 35°to 50°,the air side lip angle is 15°to 30°,the waist thickness is 1.0 mm to 1.3 mm,the waist length is 0.9 mm to 1.2 mm,the spring modulus is 1175 MPa to 1250 MPa,and the rubber hardness is 70HA to 85HA,it is beneficial to improve the reliability of the oil seal.Within this range of values,the reliability of dynamic sealing increases with the increase of interference,oil side lip angle,rubber material hardness,waist thickness,and theoretical contact width,while decreases with the increase of spring elastic modulus,waist length,and air side lip angle.

关 键 词：唇形密封 动态密封 静态密封 密封可靠性 泵吸率 摩擦扭矩 

分 类 号：TH117[机械工程—机械设计及理论] TB42[一般工业技术]