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US 10,329,939 B2Granted
Blade tip clearance control system including BOAS support
AssigneeUnited Technologies Corporation
InventorJose R. Paulino
Life of this patent
Estimating the term…
Abstract
This disclosure relates to a gas turbine engine including a blade outer air seal (BOAS) mounted radially outwardly of a blade. The engine further includes a BOAS support. A radial dimension of the BOAS support is selectively changeable in response to a flow of fluid through the BOAS support to adjust a radial position of the BOAS relative to the blade.
Claims17
A gas turbine engine, comprising:
- a blade outer air seal (BOAS) mounted radially outwardly of a blade;
- a BOAS support, wherein a radial dimension of the BOAS support is selectively changeable in response to a flow of fluid through the BOAS support to adjust a radial position of the BOAS relative to the blade;
- wherein the BOAS support includes a flange received in a slot formed in an engine case, and wherein a radially outer surface of the flange is spaced from a radially outer surface of the slot in at least one condition,
- wherein the BOAS support includes at least three circumferentially spaced-apart flanges engaging a respective slot formed in the engine case to restrict circumferential movement of the BOAS support relative to the engine case,
- wherein each of the at least three circumferentially spaced-apart flanges extends radially outboard in a direction substantially normal to an engine central longitudinal axis from the radially outer surface of the BOAS support, and
- wherein an outer circumferential face of at least two of the circumferentially spaced-apart flanges are configured to engage outer circumferential faces of a respective slot.
3 more elements
A blade outer air seal (BOAS) support, comprising:
- at least one flange extending from a radially outer surface of the BOAS support, the at least one flange configured to radially support the BOAS support relative to an engine case, and the at least one flange configured to allow a radial dimension of the BOAS support to change,
- wherein the BOAS support includes at least three circumferentially spaced-apart flanges configured to engage a respective slot formed in the engine case to restrict circumferential movement of the BOAS support relative to the engine case,
- wherein each of the at least three circumferentially spaced-apart flanges extends radially outboard in a direction substantially normal to an engine central longitudinal axis from the radially outer surface of the BOAS support, and
- wherein an outer circumferential face of at least two of the circumferentially spaced-apart flanges are configured to engage outer circumferential faces of a respective slot.
1 more element
A method for regulating tip clearance, comprising:
- regulating a clearance between a blade outer air seal (BOAS) and a tip of a blade by changing a radial dimension of a BOAS support;
- introducing fluid into the BOAS support to change the radial dimension of the BOAS support, wherein the BOAS support includes at least three circumferentially spaced-apart flanges;
- engaging the at least three circumferentially spaced-apart flanges with a respective slot formed in an engine case to restrict circumferential movement of the BOAS support relative to the engine case;
- and
- engaging an outer circumferential face of at least two of the circumferentially spaced-apart flanges with outer circumferential faces of a respective slot.
2 more elements
Dependencies are inferred from the claim text.