Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part – Between axial flow runner and vane or vane diaphragm structure
Reexamination Certificate
2011-05-24
2011-05-24
Look, Edward (Department: 3745)
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
Between axial flow runner and vane or vane diaphragm structure
C416S19300A, C416S24100B
Reexamination Certificate
active
07946808
ABSTRACT:
A rotor and a stator assembly, wherein the rotor (30) comprises at least one stage of rotor blades (32) and the stator (34) comprises at least one stage of turbine stator vanes (36). The rotor blades (32) have aerofoils and platforms (42) and the turbine stator vanes (36) having aerofoils and platforms (48). A seal (43,45) is defined between the rotor blade (32) platforms (42) and the stator vane (36) platforms (48) wherein a portion (42B) of the rotor blade platforms (42) and/or a portion (48B) of the stator vane (36) platforms (48) comprise a shape memory alloy member or a bimetallic member. The shape memory alloy member, or bimetallic member, controls the flow of cooling air through the seals (43,45) allowing a greater cooling flow at higher temperatures than at lower temperatures.
REFERENCES:
patent: 2970808 (1961-02-01), Coppa
patent: 3982850 (1976-09-01), Jenkinson
patent: 5333993 (1994-08-01), Stueber et al.
patent: 2005/0058539 (2005-03-01), Diakunchak
patent: 2008/0267770 (2008-10-01), Webster et al.
patent: 2 715 968 (1995-08-01), None
Taylor Mark D
Webster John R
Eastman Aaron R
Look Edward
Manelli Denison & Selter PLLC
Melcher Jeffrey S.
Rolls-Royce plc
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