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Publication Title | United States Patent [191 Smithetal. TURBINE ENGINE BLADE VARIABLE COOLINGMEANS

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Text | United States Patent [191 Smithetal. TURBINE ENGINE BLADE VARIABLE COOLINGMEANS | 001



United States Patent [191 Smithetal.

[54] TURBINE ENGINE BLADE VARIABLE COOLINGMEANS

[75] Inventors: Raymond Smith, Monclova; Quentin Z. Peregoy, Toledo; George E.

R-h ’S1 -’n“311- ' 1cardsonyvamaa0 1O

[73] Assignee: TeledyneIndustries,Inc.,Los Angeles,Calif.

[21] Appl. No.: 68,131 _

[22] Flled: Jun-30,1987

[51] Int.Cl.4..F02C7/12 [52] US.Cl...60/39.75;60/3907; 60/3933; 415/127; 137/62531 [58] FieldofSearch..60/3983,39.07,39.29, 60/39.75; 415/150, 127, 116, 175; 137/625.31, 625.28; 251/345; 74/54

[1] PatentNumber: 4,785,624 [45] DateofPatent: Nov.22,1988

4,416,111 11/1983 Lenahanetal...160/3929 4,462,2047/1984Hull.. 60/3907 4,603,547 8/1986 Pfefferleetal.. ..60/3902 4,688,986 8/1987 Schucker..415/150

_,

Primary Examiner-Donald E. Stout

Attorney, Agent, or Firm-Gifford, Groh, VanOphern,

Sheridan,sprinkleandDolgorukov

[57] ABSTRACT ____,_

A turbineengine,havingacoolingpassagedivertinga part of the air?ow from the turbine compressor for

impingement "Po" the turbine blades, includes a con‘ centric Pail‘ 0f apemll'ed rings disposed in the Passage for variably obstructing ?ow through the cooling pas sage between zero and a maximal value. One of the rings is ?xed to the turbine housing, while the other of the rings is rotatable with respect to the ?rst ring and the housing. The mobile ring can be rotated by a pres surized cylinder and piston assembly, or by a biasing device causing abutment ofa stop on the second ring againstanabutmentsurfaceonacam.Thecylinderand pistonareactuated,orthecamisrotated,independence upon an engine operating characteristic such as engine speed, pressure, temperature, ?ight condition or other

determinable parameter.

16 Claims, 3 Drawing Sheets

[56]

References Cited

Us‘ PATENT DOCUMENTS

3,074,432 l/1963 Bealeetal...l37/625.28

3,127,909 4/1964 Alarnprese

3,779,007 12/1973 Lavash .............

3,958,413 5/1976 Corneliuseta1.

4,085,579 4/1978 Holzapfeletal.

4,304,09312/1981 Schulze..60/39.07 4,344,282 8/1982 .,.60/3907 4,398,926 11/1982 Smith ............................60/3983

.137/625.31 ...... 60/3928 ..60/3923 ..60/3904

90 l

Image | United States Patent [191 Smithetal. TURBINE ENGINE BLADE VARIABLE COOLINGMEANS



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