大桥电厂水轮发电机集电环磨损分析

摘要

水轮发电机的集电环在运行十年后，其外圆直径减少两厘米多，而且负极滑环的磨损较正极滑环严重，正极碳刷的损耗较负极碳刷的损耗稍快。在直流电流的强迫作用下，接正极的材料因失去电子被氧化而从单质变为离子，接负极的材料则因得到电子而被还原，仍以单质形式存在，这就是腐蚀电池原理。利用该特性，可以对阴极材料进行保护。%Having run for ten years, the outer diameter of hydro-generator collector ring reduced more than two centimeters, the wear of negative slip ring was more serious than that of the positive slip ring, and, the wastage of the anode carbon brush was more quickly than that of the cathode carbon brush. Under the effect of direct current, the galvanic cell’s anode material was oxidized because of lost electrons and changes into ions from elementary substance, however, the cathode material is restored because of getting electronic and still exists as elemental, this is called the Corrosive Cell Principle. Using this feature, the cathode materials can be protected.