Floating sealing device of nuclear power station hydrodynamic pressure type main pump mechanical seal

The invention belongs to the technical field of nuclear power maintenance and particularly relates to a floating sealing device of a nuclear power station hydrodynamic pressure type main pump mechanical seal. According to the embodiment of the invention, the size of a static ring guide of an O-shaped ring can be better matched with the outer diameter of a static ring guide sleeve, so that the frictional resistance between the static ring guide sleeve and a static ring seat is greatly reduced compared with the related art, the follow-up performance of a static ring is obviously improved, the O-shaped ring can still keep the original shape after being used for a long time, the low-pressure leakage amount of the mechanical seal is effectively reduced, and the problem of a high leakage amountis solved. The disclosed sealing structure of the nuclear power station hydrodynamic pressure type main pump mechanical equipment, the problem that a certain hydrodynamic pressure type main pump mechanical seal frequently bre