Bushing arranged between a body and a shaft, and connected to the shaft

Patent metadata

Field	Value
Publication number	US-11022145-B2
Application number	US-201816105336-A
Country	US
Kind code	B2
Filing date	Aug 20, 2018
Priority date	Feb 15, 2013
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A variable area vane arrangement includes a stator vane, a bushing and a vane platform with an aperture. The stator vane rotates about an axis, and includes a shaft that extends along the axis into the aperture. The bushing is connected to the shaft, and is arranged within the aperture between the vane platform and the shaft.

First claim

What is claimed is:

1. A variable area vane arrangement, comprising:
a vane platform including an aperture having a depth that extends along an axis;
a stator vane that rotates about the axis, the stator vane including a shaft that extends along the axis into the aperture;
a bushing fixedly connected to the vane platform, the bushing arranged within the aperture between the vane platform and the shaft, and the bushing having a length that extends along the axis and is one of substantially equal to and less than the depth;
an element that at least one of axially retains and rotatably constrains the bushing within the aperture, the element comprising a fastener that extends from the vane platform into the bushing; and
a second bushing that is arranged within the aperture between the bushing and the shaft, and the second bushing is connected to the shaft.

2. The vane arrangement of claim 1 , wherein
the aperture extends into the vane platform from a platform side; and
the bushing is recessed into the vane platform from the platform side by a distance along the axis.

3. The vane arrangement of claim 1 , wherein
the aperture extends within the vane platform to a shelf;
the bushing extends along the axis between opposing bushing ends; and
a first of the bushing ends engages the shelf.

4. The vane arrangement of claim 1 , wherein
the vane platform extends circumferentially around a second axis; and
the shaft extends into the aperture in a radial inward direction relative to the second axis.

5. A turbine engine, comprising:
a plurality of engine sections arranged along a second axis, the engine sections including a compressor section, a combustor section and a turbine section; and
the variable area vane arrangement of claim 1 , the variable area vane arrangement configured to direct gas for one of the engine sections.

6. The engine of claim 5 , wherein
the engine sections further include a fan section; and
the variable area vane arrangement is configured to direct the gas for the fan section.

7. The engine of claim of claim 5 , further comprising a gear train that connects a rotor in a first of the engine sections to a rotor in a second of the engine sections.

8. A variable area vane arrangement, comprising:
a vane platform including an aperture having a depth that extends along an axis;
a stator vane rotatable about the axis, the stator vane including a shaft that extends along the axis into the aperture;
a bushing fixedly connected to the vane platform, the bushing arranged within the aperture between the vane platform and the shaft, and the bushing having a length that extends along the axis and is one of substantially equal to and less than the depth;
an element at least one of axially retaining and rotatably constraining the bushing within the aperture, the element comprising a cylindrical pin that extends from the vane platform into the bushing; and
a second bushing arranged within the aperture between the bushing and the shaft, and the second bushing connected to the shaft.

9. The vane arrangement of claim 8 , wherein
the aperture extends into the vane platform from a platform side; and
the bushing is recessed into the vane platform from the platform side by a distance along the axis.

10. The vane arrangement of claim 8 , wherein
the aperture extends within the vane platform to a shelf;
the bushing extends along the axis between opposing bushing ends; and
a first of the bushing ends engages the shelf.

11. The vane arrangement of claim 8 , wherein
the vane platform extends circumferentially around a second axis; and
the shaft extends into the aperture in a radial inward direction relative to the second axis.

12. A variable area vane arrangement, comprising:
a vane platform including an aperture having a depth that extends along an axis;
a stator vane that rotates about the axis, the stator vane including a shaft that extends along the axis into the aperture;
a bushing fixedly connected to the vane platform, the bushing arranged within the aperture between the vane platform and the shaft, and the bushing having a length that extends along the axis and is one of substantially equal to and less than the depth;
an element at least one of axially retaining and rotatably constraining the bushing within the aperture, the element comprising a fastener that extends from the vane platform radially into a notch in the bushing;
wherein the bushing has a tubular sidewall that extends radially between an inner surface and an outer surface, and the notch extends partially radially into, but not through, the tubular sidewall from the outer surface; and
a second bushing arranged within the aperture between the bushing and the shaft, and the second bushing connected to the shaft.

13. The vane arrangement of claim 12 , wherein
the aperture extends into the vane platform from a platform side; and
the bushing is recessed into the vane platform from the platform side by a distance along the axis.

14. The vane arrangement of claim 12 , wherein
the aperture extends within the vane platform to a shelf;
the bushing extends along the axis between opposing bushing ends; and
a first of the bushing ends engages the shelf.

15. The vane arrangement of claim 12 , wherein
the vane platform extends circumferentially around a second axis; and
the shaft extends into the aperture in a radial inward direction relative to the second axis.

Assignees

• United Technologies Corp
• Raytheon Tech Corp

Inventors

• Maliniak David
• Champion Nathan F
• Frisk Kenneth A

Classifications

• F05D2250/73

  asymmetric · CPC title

• F01D17/162

  for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line (F01D17/167 takes precedence) · CPC title

• F04D29/563 Primary

  specially adapted for elastic fluid pumps · CPC title

• F05D2250/14

  elliptical · CPC title