Assembly for controlling the flow of cooling air i

专利名称：Assembly for controlling the flow of cooling

air in an engine turbine

发明人：Robert Kervistin申请号：US07/063075申请日：19870617公开号：US04730982A公开日：19880315

摘要：A blade root sockets provided in the discs of a turbine rotor have passages forcooling air which are arranged to be variably blocked by closure means carried by theupstream and downstream ends of the labyrinth carriers disposed between the discs. Thelabyrinth carriers are of the pin-like type and are able to expand and contract in responseto the temperature of the gas flow passing through the turbine, moving the closuremeans to open or close the passages. The positions of the closure means adjacent thepassages are determined by the relative dimensions and the thermal expansioncoefficients of the discs and the labyrinth carriers, and may be chosen to provide fullcooling air flow during engine acceleration, a reduced flow during stable operation, and avery restricted flow to the first disc only during deceleration.

申请人：SOCIETE NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURSD'AVIATION \"S.N.E.C.M.A.\"

代理机构：Oblon, Fisher, Spivak, McClelland & Maier

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