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US 8,186,945 B2Granted
System and method for clearance control
AssigneeGeneral Electric Company
InventorsShubhra Bhatnagar, Chakrakody Girish Shastry
Life of this patent
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Abstract
A system, in one embodiment, includes a turbine clearance controller. The turbine clearance controller is configured to independently adjust clearances of a plurality of shroud segments about a plurality of blades via first and second magnets opposite from one another in fixed and movable portions of each shroud segment.
Claims20
A system, comprising:
- a turbine engine, comprising:
- a shaft comprising an axis of rotation;
- a plurality of blades coupled to the shaft;
- a shroud comprising a plurality of segments disposed circumferentially about the plurality of blades, wherein each segment comprises:
- a fixed shroud portion comprising a first magnet;
- and
- a movable shroud portion comprising a second magnet opposite from the first magnet, wherein at least one of the first or second magnets comprises an electromagnet, the movable shroud portion is magnetically actuated by the first and second magnets to move in a radial direction relative to the axis to adjust a clearance between the plurality of blades and the movable shroud portion, and the first and second magnets are disposed in a cavity located between the fixed shroud portion and the movable shroud portion.
4 more elements
A system, comprising:
- an annular shroud configured to extend around a plurality of blades of a compressor or a turbine, wherein the annular shroud comprises:
- a fixed shroud portion comprising a first electromagnet;
- and
- a movable shroud portion comprising a second electromagnet, wherein the movable shroud portion is magnetically actuated by the first and second electromagnets to move in a radial direction relative to a rotational axis of the blades to adjust a clearance between the plurality of blades and the movable shroud portion, and the first and second electromagnets are disposed in a cavity located between the fixed shroud portion and the movable shroud portion.
1 more element
A system, comprising:
- a turbine clearance controller configured to independently adjust clearances of a plurality of shroud segments about a plurality of blades via first and second magnets opposite from one another in fixed and movable portions of each shroud segment, wherein the first and second magnets are disposed in a cavity located between the fixed and movable portions of each shroud segment.
Dependencies are inferred from the claim text.