Patent ID: 8308110
Filing Date: 2012-11-13
Classification: B64D,F02C,Y02T

Abstract:
1. A system for deicing a leading edge of a nose inlet cowl of a turbine engine, said leading edge being defined by a hollow annular chamber closed off by a first internal bulkhead of the cowl, said deicing system comprising: a pressurized hot air supply duct having a rear end and a front end in which the rear end of the pressurized air supply duct is connected to a pressurized hot air circuit of the turbine engine and the front end is connected to an injector that injects pressurized hot air from the pressurized hot air circuit into said annular chamber said supply duct passing through a compartment of said nose inlet cowl, with the compartment being defined at a front end by said first internal bulkhead and at a rear end by a second internal bulkhead; and an internal protective envelope arranged in said compartment and defining an isolation volume enclosing said supply duct, wherein: said supply duct and said protective envelope are longitudinally rigid, and at least one of said supply duct and said protective envelope is integrally connected to the pressurized hot air circuit; on one side, said supply duct and said protective envelope are rigidly fastened to one of said bulkheads; and on the other side, said protective envelope is configured to slide relative to a sliding bearing provided at the other bulkhead; and on said other side said supply duct is connected to said protective envelope by a spring washer made of a spring steel and having internal and external peripheries, with the spring washer being welded to said supply duct and to said protective envelope at the internal and external peripheries of the spring washer, and with the spring washer being configured to close off said isolation volume and provide relative longitudinal movement between said supply duct and said protective envelope.