Arrangement for maintaining clearances between a turbine rotor a

Details Arrangement for maintaining clearances between a turbine rotor a Arrangement for maintaining clearances between a turbine rotor a

1982-06-30

1984-04-03

Hart, Douglas

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

60 3936, 415117, 415136, 415139, F02C 718, F01D 1108, F01D 2512

Patent

active

044399812

ABSTRACT:
An annular sleeve surrounds a turbine rotor and is fixed with respect to the turbine casing, the sleeve being elastically deformable in a radial direction. A wear ring is carried by the sleeve, the wear ring being composed of segments arranged end-to-end circumferentially. The adjacent ends of the segments are spaced apart when the turbine is cold or idling. The thermal expansions of the turbine rotor and of the sleeve and ring are so related that in one operating temperature range of the turbine the spaces between the adjacent ends of the ring segments close and the segment ends engage each other, and in a higher operating temperature range of the turbine the sleeve expands. Air leaving the compressor is directed against the sleeve and the stationary part carrying the sleeve. The wear ring and portion carrying the sleeve may be insulated. The sleeve may be mounted on a combustion chamber surrounding the turbine.

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