加强对牵引电机电刷的摩擦与磨损问题的研究,关系到电机工作的可靠性及电刷和换向器的使用寿命问题,这对提高牵引电机的工作品质,降低运用和检修的经济成本,都有现实的意义。一、电刷与换向器滑动接触的特点1.局部面积上的不断变化着的点接触由于电刷结构疏松、有气孔,换向器表面也不是极光滑,因此接触面是局部的。随着电 The research on the friction and wear of the brush motor is related to the reliability of the motor and the service life of the brush and the commutator. This will improve the working quality of the traction motor, reduce the economic cost of operation and maintenance, All have real meaning. First, the brush and the commutator sliding contact characteristics 1. Local area of ​​the changing point of contact As the brush structure loose, stomatal, commutator surface is not very smooth, so the contact surface is partial. With electricity