Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural distributing means immediately upstream of runner
Patent
1988-11-07
1989-05-30
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Plural distributing means immediately upstream of runner
4152094, F01D 102, F01D 904
Patent
active
048346144
ABSTRACT:
A segmented turbine vane nozzle assembly for a steam turbine has an inner ring and a plurality of vanes with each vane having a base end and a profile tip and a profile tip trailing edge extension portion and each vane base end being attached to the inner ring and extending radially therefrom. An annular outer ring has a plurality of arcuate grooves of predetermined depth therein. The outer ring is mounted concentrically with the inner ring. Each vane profile tip trailing edge extension portion extends into one outer ring arcuate groove. Each of the vane profile tips leading edge portion is attached to the outer ring so that a vane assembly is formed without welding the profile tip trailing edge of the vanes. This reduces flow leakage and the formation of erosion caused by the formation and release of large droplets. A method of making a segmented turbine vane nozzle assembly is also disclosed.
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Davids Joseph
Silvestri, Jr. George J.
Bach K.
Garrett Robert E.
Readey Michael V.
Westinghouse Electric Corp.
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