Water -cooled generator group and pressure differential controller thereof

The utility model discloses a pressure differential controller utilizes the throttle principle, opens orifice (being the inlet opening that the internal diameter size of back end is greater than the anterior segment) in the pressure differential controller inner room side of fluid process, reduces the water pressure impact force of hydroecium about getting into, as far as possible the dispersion improve pressure differential controller life to the bigger area, because of acquiescence in the normal use in -process cavity is the static pressure, can not influence pressure differential controller performance yet. This scheme can realize following advantage: 1, simple structure, processing convenience, it can not influence pressure differential controller wholeness, 2, can reduce the water hammer greatly to the impact of diaphragm, improves the reliability. The utility model also discloses an use the cooling water set of above -mentioned pressure differential controller, has solved cooling water set sail hammer impact and has leaded to the fragile condition of pressure differential controller, has realized the complete machine reliability.