F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/39
F16J 15/32 (2006.01) F16J 15/16 (2006.01)
Patent
CA 1150745
ABSTRACT There is disclosed a high pressure shaft seal for use between a shaft and a surrounding housing, the shaft and housing being relatively rotatable, the housing having an opening extending therethrough for receiving the shaft there- in. A rigid case is adapted to be fixed relatively to the housing in a position encircling the shaft, the case having a central axis adapted to be generally coincident with that of the shaft, and comprising an outer annular wall portion adapted to fit within the housing and a front wall portion extending radially inwardly perpendicular to the central axis on a lower pressure side of the seal. A rigid pressure member is provided, having a central axis adapted to be gener- ally coincident with that of the shaft and comprising an outer annular wall portion adapted to fit within the housing with its front end abutting the front wall portion of the case and a rear wall portion extending radially inwardly perpendicular to the central axis and spaced from the front wall portion of the case to form therebetween an inwardly open annular groove having its bottom spaced radially outwardly from the shaft. An elastomeric primary sealing member, having a central axis adapted to be generally coincident with that of the shaft comprises an outer annular wall portion fitting within the outer annular wall portion of the rigid case with its front side abutting the rear wall portion of the pressure member and a radially inwardly directed sealing lip for engaging said shaft. An annular floating support element is mounted within the groove for free radial movement therein, the support element having an inner surface for engaging the shaft and an outer surface spaced radially inwardly from the bottom of the annular groove. The floating support element, when fitted, is free to move radially within the groove with the shaft to accommodate any relative eccentricity between the shaft and housing and so prevent extrusion of the primary sealing lip between the shaft and support element.
370373
International Packings Corporation
Smart & Biggar
LandOfFree
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