Load reducing variable geometry turbine

Details Load reducing variable geometry turbine Load reducing variable geometry turbine

1994-11-21

1996-06-04

Denion, Thomas E.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

415165, F01D 1714

Patent

active

055226973

ABSTRACT:
A variable geometry turbine comprising a housing 1 including an annular cavity 19 which supports a moveable annular wall member 5. An annular turbine inlet passageway 4 is defined between an end face of the moveable wall member 5 and a facing wall 6 of the housing 1. The moveable wall member 5 is moveable so as to vary the width of the annular turbine inlet passageway 4. Gas tight seals 20, 21 are provided between the wall member 5 and radially inner and outer surfaces of the cavity 19 and apertures 24 are provided through the face of the annular wall member 5. The arrangement is such that the mean pressure difference between the cavity 19 and the annular turbine inlet passageway 4 is reduced so that the total axial load on the wall member 5 due to gas flow through the inlet passageway 4 is reduced.

REFERENCES:
patent: 2957424 (1960-10-01), Brundagen et al.
patent: 3749513 (1973-07-01), Chute
patent: 4415307 (1983-11-01), Fortman
patent: 4416583 (1983-11-01), Byrns
patent: 4557665 (1985-12-01), Szczupak
patent: 4844690 (1989-07-01), DeLaurier et al.
patent: 5183381 (1993-02-01), McKean

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