Fluid pressure assisted rotary shaft seal with labyrinth bushing and replacement seal sleeve cartridge

摘要

A replaceable wear sleeve cartridge fixedly mounted to a housing bore carries internally the fixed race of an anti-friction bearing and a static seal race. The wear sleeve cartridge defines with a labyrinth preseal bushing fixed to the shaft, the basic elements of a labyrinth preseal and additionally resiliently couples through a seal wedge, a rotating seal race whose end face is both fluid pressure and resiliently biased against the end face of the annular static seal race.