深海机械密封端面摩擦及变形特性研究  

Study on Friction and Deformation Characteristics of End Faces of Deep⁃sea Mechanical Seal

作　　者：樊智敏[1] 哈振骞 李龙 李庆党 FAN Zhimin;HA Zhenqian;LI Long;LI Qingdang(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao Shandong 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《润滑与密封》2020年第9期36-42,共7页Lubrication Engineering

基　　金：山东省重点研发计划项目(2017CXGC0607);山东省自然科学基金项目(ZR2018MEE014).

摘　　要：以深海推进器等水下设备用机械密封为研究对象,建立机械密封环模型,考虑深海变工况下接触端面摩擦因数的差异性,采用分离法分别对机械密封动、静环端面进行热-力耦合变形分析,并对分别考虑密封环热变形、力变形、热-力耦合变形的分析结果进行比较。结果表明:接触端面摩擦因数大小与介质压力、转速、液膜厚度等因素有关,端面摩擦因数随介质压力增大而减小,随转速增大而增大,随液膜厚度增大而减小;单一力变形、热变形分析与热-力耦合变形分析结果差别较大,热-力耦合分析结果要比单一变形分析更接近实际、分析更准确;瞬态工况下,端面温度及端面接触应力峰值均出现由外向内的变化趋势,端面接触状态受端面温度分布影响明显。Taking mechanical seal of deep⁃sea thruster as the research object,a mechanical seal ring model was established.Considering the difference of the friction coefficients of contact end faces under variable working conditions,the thermal⁃mechanical coupling deformation of the end faces of mechanical seal dynamic and static rings were analyzed by the separation method.The analysis results considering thermal deformation,force deformation and thermal⁃mechanical coupling deformation of sealing ring were compared.The results show that the frictional coefficient of contact end faces is related to the medium pressure,rotational speed,liquid film thickness and other factors.The frictional coefficient of contact end faces is decreased with the increase of the medium pressure,increased with the increase of the rotational speed,and decreased with the increase of the liquid film thickness.The results of single force deformation analysis,thermal deformation analysis and thermo⁃mechanical coupling deformation analysis are quite different.The results of thermo⁃mechanical coupling analysis are more accurate than those of single deformation analysis.Under transient working conditions,the peak contact pressure and temperature of the end face show a change trend from outside to inside,and the contact state of the end face is obviously affected by the temperature distribution of the end face.

关 键 词：机械密封环 端面摩擦因数 端面变形 热-力耦合 

分 类 号：TH136[机械工程—机械制造及自动化]