Stern tube seal device
First Claim
1. A stern tube seal device characterized in that an annular case member is arranged in the outer periphery of a shaft, a mechanical seal for sealing a portion between said case member and the peripheral surface of the shaft is disposed at a position closer to the ship in the inner periphery of said case member, an annular recess portion is formed externally of the ship of said mechanical seal in the inner peripheral surface of said case member, a limited leaking type seal in sliding relation with the peripheral surface of the shaft is fitted into said annular recess portion, and a pressure fluid feed line, which is open to an annular space between said limited leaking type seal and said mechanical seal is feed pressure fluid, is provided.
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Accused Products
Abstract
A stern tube seal device wherein an annular case member is arranged in the outer periphery of a shaft, a mechanical seal is arranged in a gap therebetween and at a position at the side of the ship, a limited leaking type seal is arranged at a position at the side of sea water, and pressure fluid is fed in the intermediate between both the seal members to enhance a sealing effect by pressure of the pressure fluid.
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Citations
1 Claim
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1. A stern tube seal device characterized in that an annular case member is arranged in the outer periphery of a shaft, a mechanical seal for sealing a portion between said case member and the peripheral surface of the shaft is disposed at a position closer to the ship in the inner periphery of said case member, an annular recess portion is formed externally of the ship of said mechanical seal in the inner peripheral surface of said case member, a limited leaking type seal in sliding relation with the peripheral surface of the shaft is fitted into said annular recess portion, and a pressure fluid feed line, which is open to an annular space between said limited leaking type seal and said mechanical seal is feed pressure fluid, is provided.
Specification
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- Resources
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Current AssigneeEagle Industry Company Limited, Mitsubishi Jukogyo Kabushiki Kaisha (Mitsubishi Heavy Industries, Ltd.)
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Original AssigneeEagle Industry Company Limited, Mitsubishi Jukogyo Kabushiki Kaisha (Mitsubishi Heavy Industries, Ltd.)
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InventorsKawamura, Eiichi, Ishitani, Kenichiro
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Primary Examiner(s)Ward, Robert S.
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Application NumberUS06/593,330Time in Patent Office232 DaysField of Search277/3, 277/27, 277/59, 277/65, 277/71, 277/72 R, 277/72 FM, 277/79, 277/81 R, 277/81 S, 277/93 R, 277/93 SD, 277/192US Class Current277/352CPC Class CodesF16J 15/008 with provision to put out o...
