Ship, in particular deep draft vessel having concentric, contra-

Details Ship, in particular deep draft vessel having concentric, contra- Ship, in particular deep draft vessel having concentric, contra-

1993-09-30

1994-12-20

Basinger, Sherman

Marine propulsion

Screw propeller

Propeller arrangement

277 3, 277 59, 416174, 440 83, B63H 510

Patent

active

053742087

ABSTRACT:
A ship, in particular a deep-draft vessel configured for travel on the oceans or great lakes, can have a hull with two concentrically rotating propeller shafts passing through the hull, and rotate in opposite directions to one another. The ship will generally have seals between the propeller shafts, and between the propeller shafts and the hull. In general, it is necessary to lubricate and cool the sealing surfaces of the individual seals, so that the useful life of the individual seals is prolonged, and the risk of failure of the seals is reduced. For the effective lubrication of highly-stressed seals of propeller drive systems for ships with two concentric propellers rotating in opposite directions, a forced feed lubrication system with circulating lubricating oil has been found to be advantageous.

REFERENCES:
patent: 3413008 (1968-11-01), Greiner
patent: 3625523 (1971-12-01), Gardner et al.
patent: 4413829 (1983-11-01), Pietsch
patent: 4793773 (1988-12-01), Kinouchi et al.
patent: 4984811 (1991-01-01), Kuwabara et al.

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