Small radial profile shroud for variable vane structure in a gas turbine engine
First Claim
Patent Images
1. A shroud for supporting a variable vane in a compressor for a gas turbine engine comprising:
- at least two components extending circumferentially, to support a radially inner trunnion on a variable vane and said at least two components being connected by a threaded fastener member extending through a hole in a first of said at least two components and into a blind hole in a second of said at least two components and wherein one of said components has additional material extending therefrom that is adapted to engage said threaded fastener and wherein said additional material is disposed within a slot within said other component.
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Abstract
A shroud for supporting a variable vane in a compressor section for a gas turbine engine includes a pair of components which are secured together by a threaded fastener extending into a blind hole in one of the two components. Additional material forms on the component which includes the blind hole extends beyond a pivot axis for the vane such that there is an increased length of engagement between the threaded fastener and the blind hole. The blind hole eliminates the need for multiple nuts and reduces the radial height of the shroud to save additional weight.
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Citations
18 Claims
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1. A shroud for supporting a variable vane in a compressor for a gas turbine engine comprising:
at least two components extending circumferentially, to support a radially inner trunnion on a variable vane and said at least two components being connected by a threaded fastener member extending through a hole in a first of said at least two components and into a blind hole in a second of said at least two components and wherein one of said components has additional material extending therefrom that is adapted to engage said threaded fastener and wherein said additional material is disposed within a slot within said other component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A compressor section for use in a gas turbine comprising:
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a plurality of rotors for rotation about an axial center line and at least one variable vane assembly positioned axially intermediate said plurality of rotor stages; and an inner shroud for mounting a radially inner portion of a variable vane in said variable vane assembly, and an actuator mechanism for causing said variable vane to pivot about a pivot axis, said inner shroud including at least two components extending circumferentially, to support a radially inner trunnion on said variable vane and said at least two components being connected by a threaded fastener member extending though a hole in a first of said at least two components and into a blind hole in a second of said at least two components and wherein one of said components has additional material extending therefrom that is adapted to engage said threaded fastener and wherein said additional material is disposed within a slot within said other component. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification