Contact interaction “brush – collector” and working efficiency of locomotive traction electric motor

Abstract

The working efficiency of locomotive traction electric motors of direct current is largely determined by the reliability of the collector-brush assembly. The paper presents the results of simulation of the contact interaction "brush-collector" in the traction electric motor of an electric locomotive. The influence of the structural features of the brush holder, the conditions and operating modes on the contact area "brush-collector", and the quality of switching is considered. Technical solutions for improving the current collection quality in the contact "brush-collector" and ensuring the working efficiency of traction electric motors of locomotives are proposed.

Contact interaction “brush – collector” and working efficiency of locomotive traction electric motor

“…To ensure a uniform distribution of the pressure of the spring shank on the brush surface, to improve the stability of the contact area and the quality of the current collector in the contact "brush-collector", an improved design of the brush holder is proposed [19] (fig. 7), including a casing 1 with windows into which two split brushes 2 are inserted, axis 5 fixed in the casing with a cotter pin, on which two clamps 3 and spiral springs 4 are mounted.…”

“…The component АED is spent on elastic deformation of the material. The work А PD is spent on plastic deformation and on the destruction of the material [5][6][7]. The thermal energy Q M released as a result of mechanical interaction is numerically equal to the work А PD .…”

“…There is a load for one roughness on the collector plate [3] , (7) where N -pressing force of the spiral spring shank of the brush holder; nnumber of roughness along the length of the collector plate (depends on the quality of the turning of the collector during repair of TEM); lplcollector plate length; аswbrush (sweeper) length.…”