Sealing device for shafts

Details Sealing device for shafts Sealing device for shafts

F - Mech Eng,Light,Heat,Weapons

16

J

277/38

F16J 15/46 (2006.01) F16J 15/24 (2006.01) F16J 15/40 (2006.01)

Patent

CA 1117159

SEALING DEVICE FOR SHAFTS ABSTRACT OF THE DISCLOSURE A sealing device is provided for shafts passing through the wall of a housing containing a pressurized medium of a pres- sure differing from that of the environment external to the hous- ing. The sealing device includes at least one ring of packing or sealing material formed in at least one annular layer around the outer surface of the shaft. A nonrigid sleeve is mounted around the outer surface of the ring of packing material. The sealing device further includes a duct for providing a source of pressurized medium to the outer surface of the nonrigid sleeve. The forces exerted by the pressurized medium on the outer surface of the sleeve are transmitted to the layer of packing material enclosed within the sleeve so that the packing material is main- tained pressed in a close sealing relationship with the outer surface of the shaft.

302368

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