Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural distributing means immediately upstream of runner
Patent
1992-11-02
1994-03-01
Kwon, John T.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Plural distributing means immediately upstream of runner
415200, 415915, F04D 2954
Patent
active
052901432
ABSTRACT:
A bicast vane and shroud rings is provided in which thermal stresses are minimized. The vane has a flange portion along its inner and outer edge. These flange portions extend from the mid-chord of the vane part way towards the leading and trailing edges and follow the camber of the vane. Each of the flange portions has a width greater than that of the vane so has to form an overhang or lip about which conventional shroud rings are cast. As the flange portions approach the leading and trailing edges their width decreases and the overhang blends into the inner and outer edge to form rounded tops and bottoms at the leading and trailing edge. These rounded tops and bottoms reduce stress concentrations in the shroud rings and increase shroud material near these edges. Additionally, a stress relieving member is provided that embraces the top and bottom edges of the thin trailing edge, and inhibits the melting of the trailing edge during bicasting.
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Kington Harry L.
Pringnitz Steven J.
Allied Signal
Holden Jerry J.
Kwon John T.
McFarland James W.
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