油气润滑对环－块摩擦副动态接触特性的影响

摘要

以环－块线接触摩擦副为研究对象，借助显式动力学有限元数值模拟分析技术，采用热力耦合分析方法，考察油气润滑条件下的冷却和润滑行为对线接触特性的影响情况。结果表明：在油气润滑条件下，增大压缩空气流速可以减轻摩擦副局部过高温度、降低温升，并减小接触应力；当空气流速增大到一定程度后，空气流速的变化对温升和应力大小影响逐渐减小。%With the help of explicit dynamic finite element numerical simulation analysis tool ,along with thermo-mechanical coupling analysis method ,the influences of lubricating and cooling behavior on line contact characteristic under oil-air lubrication were studied by the object of ring-block friction pair .The result shows that ,increasing air flow rate under oil-air lubrication can improve local high temperature ,reduce the rise in friction temperature and contact stress to a lesser degree of the friction pair ;When the air flow rate increases to a certain extent ,the influences of the change of air flow rate on temperature and stress is less .