For the phenomenon of governor oil pump pumping frequently in the FeiLaiXia power plant 4# units, the analysis get a conclusion is the blade relay device was broken, and find out the direct reason is the Blade relay cylinder Roulette bolt falled off in open cavity, scraping in the gap between the piston and cylinder, caused cylinder body burst apart, lead to the blade relay closed and open cavity string of oil.the damaged blades relay cylinder and piston got through soldering, laser Molten and surface Lathe Roughing Operation, then, the blade relay device was fitted back, as a result, the phenomenon of oil pump was disappeared, and the 4# units running in good condition now.%飞来峡电厂4#机组调速器油泵频繁泵油的现象, 其直接原因是桨叶接力器缸铜套骑缝螺栓脱落至开启腔内, 在活塞与缸体间刮擦, 引起缸体材料崩裂, 导致桨叶接力器开启腔和关闭腔串油. 受损的桨叶接力器缸和活塞经过焊接、激光熔复和表面粗车处理后回装,4#机组调速器油泵频繁泵油的现象消失, 机组运行状况良好.
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