Secondary containment spray pump

The utility model relates to a secondary containment spray pump which is composed of a disc spring, an inducer, a suction section, an impeller, a guide vane, a middle bushing, a hydrodynamic journal bearing, a filter, an outlet tube, a rotating shaft and an inlet and outlet section. A rotating shaft on a suction port is provided with the high-accuracy high-strength inducer, a disc spring support ring, the disc spring and a disc spring base plate are sequentially sleeved at the tail end of the rotating shaft and fixed through a round nut, and an H-shaped groove made of non-ferrocobalt base alloy is arranged on the surface of the hydrodynamic journal bearing. The secondary containment spray pump has the advantages of being safe in structure, stable in performance, strong in resistance to heat shock, high in cavitation resistance and the like and can meet the special requirements of the working environment of a pressurized water reactor nuclear power station.