齿轮磨合试验中的磨合电现象及其分析

在3种磨合油中的钢质渐开线直齿齿轮磨合试验中,笔者观察到摩擦副间有磨合电现象发生,即在磨合过程中,无论用数字式欧姆表还是用指针模拟式欧姆表去检测齿轮摩擦副间的电阻时,其读数皆可能为负值.研究发现,该磨合电现象是金属齿轮副磨损时发生的表面副间的电荷运动现象.文中还研究了磨合电现象的行为机理.结果表明:磨合齿轮副两表面的氧化磨损率差越大,磨合电现象越显著.文中还提出了通过检测摩擦副间的电阻表读数来判定摩擦磨损状态和修正油膜电阻参数测量值等方法.

Phenomenon of Running-in Electricity in Running-in Experiments and the Corresponding Analyses

In the running-in experiments,there exists a running-in electricity phenomenon among the running-in,the steel,the involute and the spur-gear pairs in any of three kinds of running-in oils,namely,the electric resis-tance between the gear pairs measured by digital or index ohmmeter is probably negative.This phenomenon is a surface electric phenomenon in the presence of the metal pair wear.In this paper,the mechanism of the running-in electricity phenomenon is investigated,finding that the phenomenon becomes more obvious when the difference in oxidative wear of the two surfaces increases.Moreover,a method to judge the wear status of a friction pair by mea-suring the electric resistances between the pair is put forward,also the method to revise the measured data of oil-film electric resistance.