Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Casing – runner – or shaft position or extent of motion...
Patent
1988-12-27
1990-11-20
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Casing, runner, or shaft position or extent of motion...
415 16, 415175, F01D 1100, F01D 2512
Patent
active
049715178
ABSTRACT:
A control system 30 for measuring the clearance "x" between the tip 26 of a blade 24 and wall 28 in a turbine engine8. A series of probes 32, 32' and 32.sup.N located in the wall 28 each have a reference orifice 52 and a sensing orifice 54. Fluid from a source flows through the reference orifices 52 into the turbine engine. This fluid flow is substantially unrestricted and as a result a fluid pressure P.sub.2 is established in a reference chamber 44. Fluid flow from the sensing orifice 54 is restricted by the relationship of the tip 26 of each blade 24 and as a result fluid pressure P.sub.2 ' is created in chamber 48. A multiplexer 62 sequentially provides transducer 92 and 94 with fluid pressure P.sub.2 from the reference chamber 44 and P.sub.2 ' from sensing chamber 48. The transducers 92 and 94 convert the pneumatic signals into electrical signals which are supplied to a computer 116. The computer 116 supplies a control member 118 with a operational signal to allow cooling air to flow to housing 10 to maintain a desired tip clearance "x" for the blades of the turbine.
REFERENCES:
patent: 3561216 (1971-02-01), Moore
patent: 4384819 (1983-05-01), Baker
patent: 4632635 (1986-12-01), Thoman et al.
patent: 4657479 (1987-04-01), Brown et al.
patent: 4683716 (1987-08-01), Wright et al.
Perkey Russell C.
Stanage Nickie L.
Allied-Signal Inc.
Decker Ken C.
Garrett Robert E.
McCormick Jr. Leo H.
Nguyen Hoang
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