Machined shaft seal encased in an elastomeric sleeve

Details Machined shaft seal encased in an elastomeric sleeve Machined shaft seal encased in an elastomeric sleeve

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/32 (2006.01) F16J 15/16 (2006.01)

Patent

CA 2176751

A manually assembled shaft seal assembly includes plastic sealing element having an annular tubular mounting portion and a shaft-engaging sealing lip. An annular elas- tomeric sleeve extends around the inner and outer surfaces of the tubular mounting portion to provide a resilient mount- ing mechanism for the shaft seal assembly. During service at high operating temperatures the elastomeric sleeve ab- sorbs and accommodates stresses generated m the plastic tubular portion of the sealing element by thermal expansion The elastomeric sleeve is in a compressed condition when mounted within a shaft seal housing so that it can expand slightly if necessary, to compensate for shrinkage or creep in the plastic material, such that the seal assembly is pre- vented from becoming loose in the shaft seal housing.

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