Variable turbomachine stator

Details Variable turbomachine stator Variable turbomachine stator

1975-07-02

1976-12-28

Raduazo, Henry F.

Rotary kinetic fluid motors or pumps

With lubricating, sealing, packing or bearing means having...

For shaft sealing, packing, lubricating or bearing means

415160, 415171, F01D 1100

Patent

active

039998835

ABSTRACT:
A turbine nozzle has a row of vanes each rotatable about an axis extending spanwise of the vane. Each vane is rotated by a shaft which extends through one shroud of the stator vane stage. The free end of each vane is sealed by a flexible seal ring structure made up of overlapping flexible leaves. These leaves are fixed to the nozzle inner shroud at the downstream side of the vanes and motive fluid under pressure is admitted upstream of the vanes to the space between the leaves and the shroud so that the pressure difference across the leaves biases them into engagement with the ends of the vanes. The purpose is to seal against leakage past the vane ends without causing undue frictional resistance to varying the vane setting angle.

REFERENCES:
patent: 1857961 (1932-05-01), Lamb
patent: 3647311 (1972-03-01), Wootton et al.
patent: 3904309 (1975-09-01), Keetley

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