Apparatus and method for controlling a blade tip clearance...

Details Apparatus and method for controlling a blade tip clearance... Apparatus and method for controlling a blade tip clearance...

2006-06-29

2010-02-02

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Method of operation

C415S014000, C415S128000, C415S173200, C415S173300, C415S174100

Reexamination Certificate

active

07654791

ABSTRACT:
An apparatus and method for controlling a blade tip clearance for a compressor of a turbo-engine, in particular of an aircraft engine, is disclosed. A blade tip clearance control device, which has a rotor and a housing surrounding the rotor forming a blade tip clearance, includes a sealing element that is movable into the blade tip clearance and an actuator unit, where the sealing element is designed as a circumferential shroud liner made of a flexible rubbery material in which at least one tubular diaphragm that is also circumferential is arranged. The diaphragm is acted upon with hydraulic fluid via the actuator unit. This makes it possible to counteract degradation that occurs during operation due to erosion, aging, etc. As a result, efficiency is maintained and the pump limit interval is retained.

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