Fastener cover for flowpath fasteners

Patent metadata

Field	Value
Publication number	US-10502133-B2
Application number	US-201715620451-A
Country	US
Kind code	B2
Filing date	Jun 12, 2017
Priority date	Jun 12, 2017
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A fastener cover assembly is disclosed. The cover assembly includes a turbomachinery component having an outer surface exposed to an air flow path; at least one recess formed in the outer surface; a fastener contained in the at least one recess; and a fastener cover secured in the at least one recess, the cover having an outer surface substantially flush with the outer surface of the component to minimize air flow disruption.

First claim

What is claimed is:

1. A fastener cover assembly, comprising: a turbomachinery component having an outer surface exposed to an air flow path; at least one recess formed in the outer surface; a fastener contained in the at least one recess, wherein a head of the fastener is at a position below the outer surface of turbomachinery component; and
a fastener cover secured in the at least one recess, the cover having an outer surface substantially flush with the outer surface of the turbomachinery component to minimize air flow disruption, wherein at least a portion of the fastener cover resides between the head of the fastener and the outer surface of the turbomachinery component.

2. The assembly according to claim 1 , wherein the fastener cover includes a cavity configured to receive a head of the fastener therein.

3. The assembly according to claim 2 , wherein the fastener cover includes an aperture extending through the fastener cover from the outer surface of the fastener cover to the cavity to allow a tool to be inserted therein and access the head of the fastener.

4. The assembly according to claim 2 , wherein the fastener cover includes an end wall having an opening therein for receiving a shank of the fastener therethrough, the end wall forming a lip residing against the head to secure the head of the fastener in the cavity.

5. The assembly according to claim 1 , wherein the fastener cover includes a recess formed in an end wall of the fastener cover, the recess configured to slip over a head of the fastener.

6. The assembly according to claim 5 , wherein the head of the fastener includes a threaded aperture.

7. The assembly according to claim 6 , wherein the fastener cover includes an aperture extending through the fastener cover from the outer surface of the fastener cover to a divider wall separating the aperture and recess, the divider wall having an aperture extending therethrough to provide access to the threaded aperture.

8. The assembly according to claim 7 , further including a second fastener extending through the aperture in the dividing wall and into the threaded aperture, the second fastener securing the fastener cover to the fastener.

9. A spinner assembly for a gas turbine engine, comprising:
a spinner having an outer surface exposed to an air flow path, the spinner including at least one recess formed in the outer surface;
a fastener secured in the at least one recess, wherein a head of the fastener is at a position below the outer surface of the spinner; and
a fastener cover secured in the at least one recess, the cover having an outer surface substantially flush with the outer surface of the spinner to minimize air flow disruption and includes:
an end wall;
a cavity configured to secure the head of the fastener therein;
an aperture extending through the fastener cover from the outer surface of the fastener cover to the cavity, wherein the cavity is positioned between the aperture and the end wall; and
wherein the end wall includes an opening configured to receive a shank of the fastener therethrough when the head is secured in the cavity.

10. The assembly according to claim 9 , wherein the at least one recess is defined by at least one side, and wherein one of the at least one side and fastener cover includes a slot and the other of the at least one side and fastener cover includes a projection configured for mating engagement with the slot.

11. The assembly according to claim 10 , wherein the slot and projection create a dovetail joint having a pair of spaced-apart oppositely-inclined faces.

12. The assembly according to claim 9 , wherein the at least one recess is defined by at least one side, and wherein the at least one side includes a slot and the fastener cover includes a projection, the slot and projection being configured for mating engagement when the fastener cover is positioned in the at least one recess to prevent dislodgement of the fastener cover from the at least one recess.

13. The assembly according to claim 9 , wherein the aperture is sized to permit access to the head of the fastener by a tool.

14. The assembly according to claim 9 , wherein the end wall forms a lip residing against the head to secure the head of the fastener in the cavity.

15. The assembly according to claim 9 , wherein the at least one recess includes a bottom, and wherein the bottom includes a slot and the fastener cover includes a projection positioned on a bottom of the fastener cover, the slot and projection being configured for mating engagement when the fastener cover is positioned in the at least one recess to prevent dislodgement of the fastener cover from the at least one recess.

16. The assembly according to claim 9 , wherein the at least one recess is defined by first and second opposing sides, wherein a first slot is located on the first side of the at least one recess and a second slot is located on the second side of the at least one recess.

17. The assembly according to claim 16 , wherein the fastener cover includes a first projection located on a first side of the fastener cover and a second projection located on a second side of the fastener cover, wherein the first projection is configured for mating engagement with the first slot and the second projection is configured for mating engagement with the second slot when the fastener cover is positioned in the at least one recess to prevent dislodgment of the fastener cover from the at least one recess.

18. A spinner assembly for a gas turbine engine, comprising:
a spinner having an outer surface exposed to an air flow path, the spinner including at least one recess formed in the outer surface;
a fastener secured in the at least one recess, wherein a head of the fastener is at a position below the outer surface of the spinner; and
a fastener cover secured in the at least one recess, the cover having an outer surface substantially flush with the outer surface of the spinner to minimize air flow disruption and includes:
an end wall having a recess formed therein, the recess configured to slip over the head of the fastener;
an aperture extending through the fastener cover from the outer surface to a divider wall separating the aperture and the recess, the divider wall having an aperture extending therethrough; and
a second fastener extending through the aperture in the divider wall and into a threaded aperture in the head of the fastener to secure the fastener cover to the fastener.

Assignees

• Gen Electric

Inventors

• Awasthi Richa
• Battu Bhanu Kishore
• Sakala Viswanadha Gupta
• Bishop Michael Jason

Classifications

• F05D2260/31

  Retaining bolts or nuts · CPC title

• F02C7/04 Primary

  Air intakes for gas-turbine plants or jet-propulsion plants · CPC title

• F01D5/3007

  of axial insertion type · CPC title

• F16B35/06

  Specially-shaped heads (special shape in order to rotate the bolt F16B23/00 {; separate hook adaptors for bolts F16B43/025}) · CPC title

• F05D2250/10

  Two-dimensional · CPC title