Patent ID: 6494458
Filing Date: 2002-12-17
Classification: F16J

Abstract:
A shaft sealing assembly with a pumping device for sealing a fluid at a space between a housing and a rotatable shaft, the shaft sealing assembly comprising:a seal ring unit, coaxially surrounding said shaft within said housing and arranged for movement axially relative to said shaft under a resilient pressure; counter ring unit, coaxially surrounding said shaft within said housing and prevented from axial movement relative to said shaft when in operating position; each of said ring units having an end face for mutual engagement under said resilient pressure to form a seal, one of said ring units being mounted for rotation with said shaft at least one of said end faces having a surface profile to act on a sealed fluid between said end faces; and a pumping means, positioned concentrically with said shaft and concentrically within said housing and positioned between said space and said sealing means for vaporizing a liquid portion of said fluid, said pumping means comprising a threaded internal or external cylindrical surface of a member.