Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Reexamination Certificate
2008-07-01
2008-07-01
Nguyen, Ninh H (Department: 3745)
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
C415S163000, C415S164000, C415S165000, C415S048000, C415S126000, C415S209300
Reexamination Certificate
active
11103961
ABSTRACT:
An apparatus and method are provided for permitting free rotation of turbine nozzle vanes, while minimizing or eliminating leakage on the vane side-walls. The device incorporates a plurality of nozzle vanes arranged around the circumference of a radial or mixed inflow turbine. Each of the nozzles is individually attached to a rod positioned perpendicular to the flow direction. The nozzle rods in the circumferential array protrude through a movable annular back-wall, and are rotated by a linkage or gear. Between discrete movements of the vane mechanism, a bellows device is used to provide pressure-actuated force in the movable back-wall, thereby clamping the nozzle between the two surfaces. Prior to rotating the nozzles, pressure within the bellows interior is decreased via venting to cause a retraction of the back wall.
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Corbeil Antoine H.
Kesseli James B.
Robinson Ward H.
Brayton Energy, LLC
McLane, Graf, Raulerson & Middleton, P.A.
Nguyen Ninh H
Rand Scott C.
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