Guide bearing bush pump ring structure applicable for giant unit of hydro-generator

The utility model relates to a guide bearing bush pump ring structure applicable for a giant unit of a hydro-generator. The structure consists of a pump ring, a fixed ring, a sliding rotor, an adjusting gasket and a guide bearing bush, wherein the pump ring is connected by the fixed ring; a clearance between the pump ring and the sliding rotor is adjusted by using the adjusting gasket, so that a clearance pump is formed; lubricating oil in an oil tank of a bearing is supplied to the bearing bush by using pressure difference generated by the clearance pump to realize a lubrication effect. According to the structure, the clearance between the pump ring and the sliding rotor can be accurately adjusted by using the adjusting gasket, so that excellent precise matching between designed oil consumption and actual demand is realized; in the case of mismatching between calculated oil consumption and actual oil consumption during the period of installation or trial run, the precise adjustment can be implemented through