The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2007
Filed:
Jul. 08, 2004
Thomas Chereau, Juvisy sur Orge, FR;
Thierry Jean-maurice Niclot, Savigny sur Orge, FR;
Alain Raffy, Yerres, FR;
Patrice Suet, Montgeron, FR;
Christophe Yvon Gabriel Tourne, Varennes Jarcy, FR;
Thomas Chereau, Juvisy sur Orge, FR;
Thierry Jean-Maurice Niclot, Savigny sur Orge, FR;
Alain Raffy, Yerres, FR;
Patrice Suet, Montgeron, FR;
Christophe Yvon Gabriel Tourne, Varennes Jarcy, FR;
SNECMA Moteurs, Paris, FR;
Abstract
The invention relates to a device for passive control of the thermal expansion of the extension casing of a turbo-jet engine, said extension casing surrounding the casing of the high pressure compressor of the turbo-jet engine, and including a flange for attachment to an upstream flange of the casing of the combustion chamber. It is characterised in that at least one circumferential cavity is provided between both said flanges wherein circulates a gas flux tapped at the inlet of the combustion chamber. One uses thus a natural circulation generated by the differential pressure. Thanks to the device of the invention, the flange is passively controlled, and the stresses resulting from a differential expansion between the skin of the casing and its attachment flange are reduced.