Assembly For An Aircraft Propulsion Assembly With Disengageable Coupling Of Two Shafts By A Coupling Sleeve With Pressurized Fluid Actuation

Abstract: A disengageable coupling assembly (2) for an aircraft propulsion assembly (1) comprises a first shaft (4) and a second shaft (6); a coupling sleeve (8) movable between positions of coupling and of uncoupling the shafts; fluid chambers defined between the coupling sleeve and the shafts; a tube (10) extending into a bore of the coupling sleeve; and means (12) for selectively supplying a first selection of the chamber(s) (39, 52, 62) and a second selection of the chamber(s) (64) with a fluid (F), via the tube (10). When the coupling sleeve is in the coupling position, a pressure of the fluid in the first selection of chamber(s) applies to the coupling sleeve a first axial force (F1) that maintains the coupling. A pressure of the fluid (F) in the second selection of chamber(s) applies to the coupling sleeve a second axial force (F2) that brings the sleeve into the uncoupling position.

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