Device and method for improving grinding precision of carbon brush of large water turbine by automatically adjusting radian

Abstract

The invention relates to a device and method for improving the grinding precision of a carbon brush of a large water turbine by automatically adjusting the radian. The device comprises a mounting plate, a grinding device, an adjusting mechanism, a tensioning mechanism, a brush holder and a dust collector, the grinding device and the brush holder are arranged on the two sides of a dust collection hole of the mounting plate respectively, and a dust collection cover of the dust collector is connected with the dust collection hole. A radian adjusting block of the adjusting mechanism makes contact with an elastic plate in the grinding device, a tensioning wheel of the tensioning mechanism is in rolling fit with a grinding belt, the adjusting mechanism adjusts the radian of the elastic plate to be consistent with the radian to be ground of the carbon brush, the tensioning mechanism tensions the grinding belt, and the carbon brush is located in a brush box and abuts against the grinding belt and a coil spring. A grinding motor drives the grinding belt to roll and grind. The device and method for improving the grinding precision of the carbon brush of the large water turbine by automatically adjusting the radian overcome the problem that a carbon brush in the prior art cannot reach the precision of close contact with a collector ring after grinding, thus affecting the stable operation of a unit. The device and method for improving the grinding precision of the carbon brush of the large water turbine by automatically adjusting the radian have the advantages of simple structure, simultaneous grinding of multiple carbon brushes at one time, adjustable grinding radian, high grinding precision, high automatic grinding efficiency and simple and convenient operation.

Description

technical field [0001] The invention belongs to the technical field of generator installation, and relates to a device and a method for automatically adjusting arcs and improving the grinding precision of carbon brushes of large water turbines. Background technique [0002] Large and giant hydroelectric generators are the core components of super hydropower stations. The principle of the synchronous motor in the unit is to convert the mechanical energy of the hydro turbine into electrical energy. The main components of the synchronous generator are the stator and the rotor. Among them, the excitation current generated by the excitation system passes through the excitation cable on the rotor, the carbon brush on the brush holder, the slip ring device, the large shaft lead wire, and flows into the magnetic pole coil on the excitation winding to generate a constant magnetic field. The rotor rotates under the drive of the water turbine, and the stator winding of the generator co...

AI Technical Summary

Problems solved by technology

[0004] In the slip ring chamber, the surface of the slip ring is rubbed and polished. The space is narrow, the operation is inconvenient, and there is a danger of personal electric shock. At present, the arc surface is manually polished, and the accuracy is difficult to guarantee. When the arc surface is not in close contact with the collector ring , there will be uneven current distribution, ignition, overheating and other phenomena, which will affect the safe and stable operation of the generator set

Images