Patent ID: 8961102
Filing Date: 2015-02-24
Classification: F04D,F16J

Abstract:
1. A shaft sealing system for a rotating machine, comprising: an outer seal ring axially-spaced from an inner seal ring along a shaft arranged for rotation in a casing of the rotating machine, the outer and inner seal rings being radially-offset from an outer surface of the shaft to define a clearance between the seals and the shaft; an oil reservoir and a pump configured to introduce oil from the oil reservoir to the clearance; an annular port defined in the casing between the inner seal ring and an outer labyrinth seal, the annular port being adapted to receive a portion of the oil introduced to the clearance, which mixes with process gas to generate an oil and gas mixture; and a blower configured to circulate the oil and gas mixture from the annular port to a trap, and return a separated process gas back to the annular port.