Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1990-07-05
1991-11-12
Cuda, Irene
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
29405, 29445, 4152191, F01D 2524
Patent
active
050636618
ABSTRACT:
A method for fabricating a split compressor case for a gas turbine engine is described which comprises the steps of assembling the two axial sections of the split case along corresponding flanges of the sections with a flat shim disposed between corresponding flanges and machining this first assembly to preselected contour, determining the degree of ovalization of the first assembly at the engine operating temperature as a function of axial extent of the assembly, assembling the two axial sections with a pair of tapered shims each having thickness which varies along the length and width thereof in correspondence with the determination of ovalization of the first assembly as a function of axial extent whereby ovalization is substantially eliminated at the engine operating temperature in an assembly of the axial sections and tapered shims.
REFERENCES:
patent: 1269832 (1918-06-01), Martell
patent: 1677264 (1928-07-01), Barney
patent: 4128928 (1978-12-01), Shotts et al.
patent: 4137006 (1979-01-01), Becker
patent: 4305192 (1981-12-01), Becker
patent: 4308655 (1982-01-01), Berger
patent: 4551065 (1985-11-01), Becker
Cuda Irene
Scearce Bobby D.
Singer Donald J.
The United States of America as represented by the Secretary of
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