Turbomachine casing comprising an endoscopy port

Patent metadata

Field	Value
Publication number	US-10618665-B2
Application number	US-201414893919-A
Country	US
Kind code	B2
Filing date	May 28, 2014
Priority date	May 31, 2013
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A turbomachine casing ( 10 ) comprising an endoscopy port ( 12 ) and a member ( 14 ) mounted on and fixed to the casing and comprising a duct ( 16 ) that communicates with the port and that comprises an internal thread into which a cap ( 28 ) can be screwed, and means ( 22, 26 ) for fixing the member to the casing, characterised in that it further comprises a cover ( 30 ) mounted on the member and at least partially covering the fixing means in order to hinder, or indeed prevent, access to same when the cover is mounted on the member, the cover being arranged to allow free access to the duct when the cap is not screwed into the duct.

First claim

The invention claimed is:

1. A turbine engine casing comprising an endoscopy opening and a member which is positioned on and fixed to the casing and comprising a chute which communicates with the endoscopy opening, and means for fixing the member to the casing, wherein said casing further comprises a plug for screwing into the endoscopy opening which comprises an internal thread, and a cowl which is mounted on the member and covers the fixing means at least in part, the cowl being arranged so as to allow free access to the chute when the plug is not screwed into said chute, said plug for bearing against the cowl so as to keep the cowl pressed against the member.

2. The casing according to claim 1 , wherein the fixing means are of the screw and nut type, the cowl being intended to impede or even prevent said means from being taken using a tool.

3. The casing according to claim 1 , wherein the cowl comprises an opening which is aligned with the chute and is designed in such a manner than the plug can be screwed into the chute through said opening.

4. The casing according to claim 1 , wherein the cowl comprises a peripheral rim extending around the member.

5. The casing according to claim 1 , wherein the cowl comprises at least one opening for mounting a screw or a threaded rod of the fixing means.

6. The casing according to claim 1 , wherein the cowl is made of metal sheeting.

7. The casing according to claim 1 , wherein said casing comprises at least two endoscopy openings, at least two members which are positioned and fixed in the region of said endoscopy openings, and at least two cowls which are mounted on said members, the cowls having shapes which are the same or different.

8. The casing according to claim 1 , wherein the cowl comprises at least one indexing and/or anti-rotation means which is designed to cooperate with a complementary means of a plug and/or of an endoscopy and/or liquid penetrant testing system.

9. A turbine engine of an aeroplane, which comprises at least one casing according to claim 1 .

10. A turbine engine comprising a casing according to claim 1 , wherein the cowl further comprises a first opening which is designed to be passed through by an endoscopy plug, and at least one second opening which is designed to be passed through by a screw or a threaded rod but not by the head of said screw or by the nut which is intended to be screwed onto the screw or the threaded rod.

11. The turbine engine according to claim 10 , wherein the cowl further comprises at least one indexing and/or anti-rotation means which is designed to cooperate with a complementary means of a plug and/or of an endoscopy and/or liquid penetrant testing system.

12. A method for carrying out an endoscopy and/or liquid penetrant testing through an endoscopy opening in a casing according to claim 1 , which comprises:
a) unscrewing the plug and removing it from the member which is fixed to the casing, and
b) introducing an endoscopy and/or liquid penetrant testing system into the chute of the member and into the opening in the casing,
the cowl remaining mounted on the member during steps a) and b).

13. The method according to claim 12 , wherein the cowl comprises at least one opening for mounting a screw or a threaded rod of the means for fixing the member, said method comprises, before step b), or before step a), positioning on said screw or threaded rod an element for locking the cowl.

14. The method according to either claim 12 , wherein, the cowl comprising at least one indexing and/or anti-rotation means and said system comprising at least one means which is complementary to said indexing means, said method comprises, during step b), a sub-step of making the indexing means of the cowl and the means which is complementary to the system cooperate in order to determine a reference position of the system with respect to the casing.

Assignees

• Snecma
• Safran Aircraft Engines

Inventors

• Leutard Florence Irene Noelle
• Durand Didier Noel
• Jamon Thibault

Classifications

• F05D2260/31

  Retaining bolts or nuts · CPC title

• B64F5/60

  Testing or inspecting aircraft components or systems · CPC title

• F05D2260/80

  Diagnostics · CPC title

• F01D21/003 Primary

  Arrangements for testing or measuring (for measuring vibrations G01H) · CPC title

• B64D29/08 Primary

  Inspection panels for power plants · CPC title