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US 4,071,254 AGranted
Static sealing mechanism for a compressor
AssigneeWestinghouse Electric Corp.
InventorsAlbert A. Raimondi, Howard N. Kaufman, Norman J. Wood
Life of this patent
Estimating the term…
Abstract
A system preventing fluid leakage from the inside of a compressor to the atmosphere. Static sealing of a non-rotating compressor shaft is provided by a multi-faced piston axially contacting a sleeve which is attached to and surrounds the shaft. The multi-faced piston is slidably actuated to the open, unsealed position during shaft rotation and to the closed, sealed position during non-rotation of the shaft by a series of conduits and valves which direct the fluid against an appropriate face of the piston.
Claims7
A machine containing a sealed fluid comprising:
- a non-rotatable, fluid-tight casing which envelops said sealed fluid;
- a rotatable shaft extending through said casing;
- a dynamic sealing means for preventing sealed fluid leakage from the casing along said shaft through a clearance between said shaft and said casing during shaft rotation, said dynamic sealing means having an operative sealing capability which is selectively actuatable and is independent of shaft rotation;
- a static sealing apparatus including an axially displaceable member which is selectively displaceable across said clearance into and out of contact with a seating member, said seating member being rotatable with and extending substantially radially from said shaft;
- and
- controlling means for displacing said displaceable member by providing selected fluid pressures to a portion of the clearance, said portion being defined by said dynamic sealing means and said displaceable member, said pressures being selected to interact with an opposing force to move said displaceable member between positions where it is separated from and where it is in contact with said seating member, the fluid providing the separating pressure comprising said sealed fluid.
3 more elements
Dependencies are inferred from the claim text.