Rotary device with bypass system

Details

Inventors: Swearingen, Judson S.;
Assignee:
Primary Examiner: Husar; C. J.
Assistant Examiner: Holland; Donald S.
Attorney, Agent or Firm: Browning, Bushman & Zamecki

A rotary fluid handling device, such as a turbine or a compressor, comprising a stationary body and a rotor rotatably mounted therein. The rotor has a flowway therethrough having a radially extending end. An annular seal coaxially surrounds the rotor within the stationary body axially distal the radially extending flowway end. The device further comprises a bypass passageway system having an inlet communicating with the area between the rotor and the stationary body on the axially opposite side of the seal from the radially extending flowway end and an outlet communicating with the flowway. The inlet opens at least partially radially outwardly into the stationary body.

DETAILED DESCRIPTION I claim: 1.
A rotary fluid handling device comprising: a stationary body; a rotor rotatably mounted in said stationary body, said rotor having at least one flowway therethrough, said flowway having an end portion extending substantially radially into said rotor; annular seal means coaxially surrounding said rotor, disposed within said stationary body, and axially spaced from said radially extending end of said flowway; and means defining a bypass passageway system having an inlet communicating with the area between said rotor and said stationary body on the axially opposite side of said seal means from said radially extending end of said flowway, said inlet opening at least partially radially outwardly into said stationary body, and an outlet communcating with said flowway, a first portion of said passageway system, including said outlet, comprising a rotor passage extending generally longitudinally through said rotor, and a second portion of said passageway system, including said inlet, comprising a stator passage extending through said stationary body.
2.
The device of claim 1 being a turbine.
3.
The device of claim 1 being a centrifugal compressor.
4.
The device of claim 1 wherein the area of said bypass passageway system inlet is less than the transverse cross-sectional area of said stator passage at any other point.
5.
The device of claim 1 wherein said stator passage is sized to prevent a fluid flow rate through said stator passage greater than the fluid flow rate through said seal means.
6.
The device of claim 5 wherein said seal means comprises a labyrinth seal, and wherein the fluid flow rate through said seal is more than twice as great as the fluid flow rate through said stator passage.
7.
The device of claim 1 wherein said flowway includes an axially directed end on the axially opposite side of said seal means from said radially extending end.
8.
The device of claim 7 wherein said rotor passage communicates with said flowway distal the radially directed 9

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