Grommet for a turbine engine

Patent metadata

Field	Value
Publication number	US-10851672-B2
Application number	US-201816120952-A
Country	US
Kind code	B2
Filing date	Sep 4, 2018
Priority date	Sep 4, 2018
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A grommet assembly for mounting to a component of a turbine engine is provided. In one exemplary aspect, the grommet assembly includes a grommet that is removably mounted within a pass-through opening defined by the component. The component may be formed of a composite material. A locking member may be mounted to a body of the grommet. A flange projects from the body. When the grommet is mounted to the component and the locking member is mounted to the body, the body is received by the pass-through opening of the component and the locking member is mounted to the body such that the locking member and the flange clamp the component to secure the grommet to the component. An interface member, such as a pin, may be received by a hole defined by the grommet.

First claim

What is claimed is:

1. A grommet assembly, comprising:
a grommet removably mounted to a component defining a pass-through opening, the grommet having a body extending between a first end and a second end and defining a hole, a flange projecting from the body at or proximate the first end and extending circumferentially around at least a portion of the hole; and
a locking member removably mounted to the body;
wherein when the grommet is mounted to the component and the locking member is mounted to the body, the body of the grommet is received within the pass-through opening of the component and the locking member is mounted to the body such that the locking member and the flange clamp the grommet to the component;
wherein the flange extends circumferentially less than three hundred sixty degrees around the hole.

2. The grommet assembly of claim 1 , wherein the body has an interface portion having a smooth outer surface and a threaded portion extending between the second end and the interface portion, wherein when the grommet is mounted to the component, the interface portion of the body is received within the pass-through opening of the component.

3. The grommet assembly of claim 2 , wherein when the locking member is mounted to the body, the locking member is threaded onto the threaded portion.

4. The grommet assembly of claim 2 , wherein the interface portion of the body has a smooth inner surface.

5. The grommet assembly of claim 1 , wherein the locking member has a secondary retention feature, wherein when the locking member is mounted to the body, the secondary retention feature is crimped onto the body.

6. The grommet assembly of claim 1 , further comprising:
a compliant member removably mounted to the body, wherein the body has an outer surface and an inner surface, and wherein when the compliant member is mounted to the body, the compliant member is disposed around at least a portion of the outer surface of the body between the locking member and the component.

7. The grommet assembly of claim 6 , wherein the compliant member is at least one of a bushing, a spring, and a damper.

8. The grommet assembly of claim 6 , wherein the component has a first surface and a second surface spaced from the first surface, and wherein the pass-through opening extends between the first surface and the second surface, and wherein when the grommet and the compliant member are mounted to the body, the compliant member is disposed between the locking member and the second surface of the component and the flange contacts the first surface of the component.

9. The grommet assembly of claim 6 , wherein the compliant member is formed of a compliant material, the compliant material having a stiffness that is less than a stiffness of the locking member and a stiffness of the component.

10. The grommet assembly of claim 1 , wherein the flange has a first flange portion extending circumferentially less than three hundred sixty degrees around the hole and a second flange portion extending circumferentially less than three hundred sixty degrees around the hole and spaced from the first flange portion.

11. The grommet assembly of claim 1 , wherein the hole of the body is configured to receive an interface member.

12. The grommet assembly of claim 1 , wherein the grommet is formed of a metallic material.

13. The grommet assembly of claim 1 , wherein the component is formed of a composite material.

14. The grommet assembly of claim 13 , wherein the composite material is a ceramic matrix composite (CMC) material.

15. The grommet assembly of claim 1 , wherein the grommet assembly defines an axial direction and the flange is located at a periphery of the grommet along the axial direction.

16. An interface assembly, comprising:
a component having a first surface and a second surface spaced from the first surface, the component defining a pass-through opening extending between the first surface and the second surface;
a grommet assembly, comprising:
a grommet having a body extending between a first end and a second end and defining a hole for receiving an interface member, the body having an interface portion and a threaded portion, the grommet further having a flange projecting from the interface portion of the body at or proximate the first end, the flange extending circumferentially less than three hundred sixty degrees around the hole; and
a locking member removably mounted to the threaded portion of the body.

17. The interface assembly of claim 16 , wherein when the interface portion of the body is received within the pass-through opening of the component and the locking member is threaded onto the threaded portion of the body, the locking member and the flange clamp the grommet to the component.

18. The interface assembly of claim 16 , further comprising:
a compliant member removably mounted to the interface portion of the body, wherein when the compliant member is mounted to the interface portion of the body, the compliant member extends circumferentially around at least a portion of the interface portion and is disposed between the locking member and the second surface of the component.

19. The interface assembly of claim 16 , wherein the locking member has a secondary retention feature, wherein when the locking member is threaded onto the threaded portion of the body, the secondary retention feature is crimped onto the threaded portion.

20. An interface assembly, comprising:
a component formed of a ceramic matrix composite (CMC) material and having a first surface and a second surface spaced from the first surface, the component defining a pass-through opening extending between the first surface and the second surface;
an interface member formed of a metallic material; and
a grommet assembly, comprising:
a grommet formed of a metallic material and having a body extending between a first end and a second end, the body having an interface portion defining a hole for receiving the interface member, the body also having a threaded portion extending from the second end to the interface portion, the grommet further having a flange projecting radially from the interface portion of the body at or proximate the first end, the flange extending circumferentially less than three hundred sixty degrees around the hole; and
a locking member removably mounted to the threaded portion of the body;

wherein when the interface portion of the body is received within the pass-through opening of the component and the locking member is threaded onto the threaded portion of the body, the locking member and the flange clamp the grommet to the component.

Assignees

• Gen Electric

Inventors

• Jakomin John Martin
• Senile Darrell Glenn

Classifications

• F01D25/243 Primary

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title

• F05D2300/6033

  Ceramic matrix composites [CMC] · CPC title

• F05D2230/64

  using positioning or alignment devices for aligning or centring, e.g. pins · CPC title

• F05D2260/31

  Retaining bolts or nuts · CPC title

• F05D2230/642

  using maintaining alignment while permitting differential dilatation · CPC title