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US 7,802,963 B2Granted
Pivot ring
AssigneeROLLS-ROYCE plc
InventorsClive R Holland, David M Lambert
Life of this patent
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Abstract
A pivot ring arrangement for a stage of variable stator vanes (VSVs) (38) in a gas turbine engine comprises a plurality of segments (12) secured in a segment carrier (22). The segments are injection molded from self-lubricating material, obviating the need for separate bushes for the VSV spindles (36).
Claims11
A variable stator vane mounting ring segment for a gas turbine engine comprising:
- a variable stator vane mounting ring segment formed only from a self-lubricating advanced engineering polymer material.
A variable stator vane mounting ring arrangement for a gas turbine engine, comprising:
- a plurality of mounting ring segments secured in a segment carrier, wherein the mounting ring segments are formed only from a self-lubricating advanced engineering polymer material.
A method of making a variable stator vane mounting ring segment, the method comprising:
- forming a variable stator vane mounting ring segment having a circular inner surface constructed and arranged to contact a spindle of a variable stator vane only from a self-lubricating advanced engineering polymer material by injection moulding.
Dependencies are inferred from the claim text.