SEAL FOR ROTATING SHAFT OF PROPELLER SHIP Russian patent published in 2017 - IPC B63H23/36 F16J15/16 

FIELD: transportation.

SUBSTANCE: shaft seal device ship propulsor between the outside water and filled with lubricant space includes multiple seal, that from the side of the outer water has at least one outward sealing ring, and from the filled lubricant space by at least one inwardly directed sealing ring. Between each two adjacent O-rings, the seal chamber is made. The first chamber is filled with the outer seal water. The second seal chamber along the feed line is fed with a gaseous medium such as compressed air, and which is controlled by the drain channel. The third sealing chamber is filled with oil and is provided with a supply from the tank through the supply line. In the supply line (43) of the oil-filled chamber (23), the sealing between the tank (8) and the chamber (23) is a circulation pump seals. Supply line (43), connected to the lower region of the chamber (23), seals the chamber and an upper region (23) has a discharge line seals (44) to the tank (8).

EFFECT: durability of the system.

19 cl, 2 dwg