IMPELLER SHROUD WITH SLIDABLE COUPLING FOR CLEARANCE CONTROL IN A CENTRIFUGAL COMPRESSOR
First Claim
1. A compressor shroud assembly in a turbine engine having a dynamically moveable impeller shroud for encasing a rotatable centrifugal compressor and maintaining a clearance gap between the shroud and the rotatable centrifugal compressor, said assembly comprising:
- a static compressor casing;
an actuator mounted to said casing; and
an impeller shroud slidably coupled at a forward end to said casing and mounted proximate an aft end to said actuator, said impeller shroud moving relative to the rotatable centrifugal compressor in an axial direction while substantially maintaining a radial alignment when said actuator is actuated.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for controlling the clearance distance between an impeller blade tip of a centrifugal compressor and a radially inner surface of an impeller shroud in a turbine engine. The system comprises a high pressure air source, an air piston mounted between an engine casing and the shroud and adapted to receive high pressure air from the high pressure air source, a mounting arm coupling the shroud and air piston, and a slidable coupling adapted to allow axial movement of the shroud and joining the shroud to an axial member.
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Citations
20 Claims
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1. A compressor shroud assembly in a turbine engine having a dynamically moveable impeller shroud for encasing a rotatable centrifugal compressor and maintaining a clearance gap between the shroud and the rotatable centrifugal compressor, said assembly comprising:
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a static compressor casing; an actuator mounted to said casing; and an impeller shroud slidably coupled at a forward end to said casing and mounted proximate an aft end to said actuator, said impeller shroud moving relative to the rotatable centrifugal compressor in an axial direction while substantially maintaining a radial alignment when said actuator is actuated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A compressor shroud assembly in a turbine engine having an impeller shroud for encasing a rotatable centrifugal compressor and maintaining a clearance gap between the shroud and the rotatable centrifugal compressor, said assembly comprising:
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a static compressor casing; an actuator mounted to said casing; and an impeller shroud comprising a static inducer portion coupled to said casing and a dynamically moveable exducer portion slidably coupled at a forward end to said inducer portion and mounted proximate an aft end to said actuator, said exducer portion moving relative to the rotatable centrifugal compressor in an axial direction while substantially maintaining a radial alignment when said actuator is actuated. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of dynamically changing a clearance gap between a rotatable centrifugal compressor and a shroud encasing the rotatable centrifugal compressor, said method comprising:
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mounting an actuator to a static casing; mounting a shroud to the actuator; slidably coupling a forward end of the shroud to the casing; and actuating the actuator to thereby move the shroud relative to a rotatable centrifugal compressor, said shroud moving relative to the rotatable centrifugal compressor in an axial direction while substantially maintaining a radial alignment. - View Dependent Claims (18, 19, 20)
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Specification