Anti-shuttle pump
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United States of America Patent
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-
Feb 2, 1988
Issued Date -
N/A
app pub date -
Feb 25, 1986
filing date -
Apr 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sealing arrangement is herein disclosed for use in a high energy centrifugal pump and the like wherein a chamber is defined about the discharge portion of the pump wheel which is attached to a shaft to form a rotor which rotates with respect to stationary parts and has limited axial movement as determined by the thrust bearing clearance. An annular seal is disposed operatively about the outside diameter of the pump wheel with sufficient clearance for the pump wheel to clear the seal regardless of the extent of the axial movement of the wheel. The seal acts to retard the shock waves of transient pressure differentials developed across the wheel. the seal further operates to define a dashpot arrangement wherein the wheel comprises a piston which automatically equalizes any pressure differential developed across the wheel and by-passing the seal.
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