The invention relates to a shaft sealing structure of a ship propeller. A race is fixedly connected with a conical ring; the conical ring is arranged on a gearbox body; a thermal spraying bushing sleeves a propeller shaft in an interference way; four rotary skeleton oil seals are arranged on a ceramic area of the thermal spraying bushing; the outer diameter of each rotary skeleton oil seal is in interference fit with an inner hole of the race; a sealing lip of the inner diameter is in contact with the ceramic area of the thermal spraying bushing; the sealing lip of the outermost rotary skeleton oil seal faces outwards, the sealing lip of the innermost rotary skeleton oil seal faces inwards, a space ring is arranged between the two middle rotary skeleton oil seals, and the space ring, the two middle rotary skeleton oil seals and the thermal spraying bushing form a cavity; a communicated gravity oil passage is arranged in the gearbox body, the conical ring, the race and the space ring, and is communicated with the cavity; a sealing part sleeves the thermal spraying bushing; a sealing lip of the sealing part is in contact with the vertical end surface of a cover plate. The propeller shaft sealing structure has the advantage that gravity oil is filled into the gravity oil cavity through the oil passage, so the seawater is prevented from entering the gearbox, and the emulsifying of lubricating oil is avoided.
Propeller shaft sealing structure of ship propeller
2015-07-29
Patent
Elektronische Ressource
Englisch
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