Active clearance control system for a turbomachine

Rotary kinetic fluid motors or pumps – Working fluid bypass – Selectively adjustable vane or working fluid control for bypass

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Details

415178, 60726, 60 3929, 60 3907, F01D 2514

Patent

active

043291147

ABSTRACT:
An axial compressor is provided with a cooling air manifold surrounding a portion of the shroud, and means for bleeding air from the compressor to the manifold for selectively flowing it in a modulating manner axially along the outer side of the stator/shroud to cool and shrink it during steady-state operating conditions so as to obtain minimum shroud/rotor clearance conditions. Provision is also made to selectively divert the flow of cooling air from the manifold during transient periods of operation so as to alter the thermal growth or shrink rate of the stator/shroud and result in adequate clearance with the compressor rotor.

REFERENCES:
patent: 2837270 (1958-06-01), Chapman
patent: 2848156 (1958-08-01), Oppenheimer
patent: 3108767 (1963-10-01), Eltis
patent: 3945759 (1976-03-01), Bobo
patent: 3966354 (1976-06-01), Patterson
patent: 3975901 (1976-07-01), Hallinger
patent: 4019320 (1977-04-01), Redinger
patent: 4069662 (1978-01-01), Redinger
patent: 4127357 (1978-11-01), Patterson
patent: 4213296 (1980-07-01), Schwarz

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