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1. (WO2018046818) DEVICE FOR CONTROLLING AIR INTAKE FLAPS USING A MULTILAYER PIEZOELECTRIC ACTUATOR

Pub. No.:    WO/2018/046818    International Application No.:    PCT/FR2017/052270
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Fri Aug 25 01:59:59 CEST 2017
IPC: F01D 17/16
F04D 27/02
F16C 32/04
Applicants: SAFRAN HELICOPTER ENGINES
Inventors: VONFELT, Jean-Julien, Camille
KLONOWSKI, Thomas
MOUTAUX, Antoine
Title: DEVICE FOR CONTROLLING AIR INTAKE FLAPS USING A MULTILAYER PIEZOELECTRIC ACTUATOR
Abstract:
The invention relates to an electric actuator for air intake flaps of a gas turbine engine comprising a fixed part (104) attached to a stationary part of the engine and a moving part (102) mechanically connected to the air intake flaps, this electric actuator (100) comprising, uniformly distributed at the periphery of the moving part and fixed to the fixed part, fixed electromagnets (108a-108h) and, arranged between these fixed electromagnets, mobile electromagnets (110a-110h) each one secured on each side to first (114a-114h) and second (116a-116h) piezoelectric elements, the mobile electromagnets and the first and second piezoelectric elements having a degree of freedom to move with respect to the moving part.