Inspection and repair of the collector ring to carry out delicate inspection: Collector ring work surface is not smooth, there are no burn marks, vertical marks, etc. . Collecting ring and shaft and each ring and insulation bushing should be strong, with hammer hitting copper ring and sleeve copper mutual cooperation, there should be metal material sound. The insulation pipe of the collector ring has no crack and no loose condition. The connection of lead-out wire should be firm, and the value of grounding resistance should not be less than 0. 5m. In the commutator brush equipment layer, the brush box bottom edge and collector ring surface distance of 2 ~ 4mm, distance from the forum will cause the brush in the brush box vibration, if the brush is hard, will be broken. The carbon brush should be easily dragged in the brush box, the surface of the hole in the brush box is smooth, the diameter standard tolerance in the brush box is H10, the radial standard tolerance is H8. Standard tolerances for total width and thickness of carbon brushes 11. The gap between Carbon Brush and brush box wall should be 0.1 ~ 0.2 mm, the gap is too large, the carbon brush causes tangential sloshing in the brush box, which affects the normal operation of the collector ring; the gap is too small, so that the electricity is in the brush box, which leads to the surface layer of the electric light copper ring with similar arc welding, carbon Brush and ring contact should be inseparable. The pressure difference between brushes can not exceed its average value of 20, the winding-wire motor with brush-lifting equipment rotor asynchronous motor, the electric shock accident of short-circuit fault ring and the knife head on the collecting ring touch evenly, the total contact area is about 60, to prevent motor Rotor single-phase electrical operation or circuit breaker overtemperature loss of ductility. For the collector ring surface light burn marks, black spots, brush marks, etc. , can be polished with oil stone, fine file, with zero-point sandpaper cloth. Http://www.czkk.com/news/470.html