ELECTRICAL MACHINE BRUSH Russian patent published in 2000 - IPC

FIELD: electrical machines taking heavy electrical and vibration loads such as motors. SUBSTANCE: brush has flat mounting pressure device (best of all permanent-pressure one) beveled relative to center line through certain angle in upper plane; novelty is that brush has flat bevel angle to specific pressure ratio chosen between 0.36 and 0.82; tangential-to-radial dimension ratio of brush is specified between 0.20 and 0.40. Mentioned ratios provide for steady operation of sliding contact under heavy electrical and vibration loads thereby reducing brush wear by 9-20% and raising their service life by 1.2-2.5 times. EFFECT: improved wear resistance and service life of brush and brush gear. 1 dwg, 1 tbl