Coupling and associated method of transferring torque

A system comprising a gas turbine engine having a driving shaft, a generator having a driven shaft, and a coupling between the driving shaft and the driven shaft, the coupling comprising:

• a female member provided as part of one of the driving shaft and the driven shaft, the female member rotatable around an axis, defining an axial recess bounded by a radially inner face, and having a plurality of connections circumferentially arranged along the radially inner face;
• a male member provided as part of the other one of the driving shaft and the driven shaft, the male member rotatable around the axis, the male member extending inside the axial recess and having a plurality of connections circumferentially arranged along a radially outer face;
• and
• a coupling member extending annularly around the axis, the coupling member having a strip, the strip having, circumferentially relative the axis, an alternating sequence of outer folds and inner folds, the outer folds connected to the female member via respective ones of the female member connections, the inner folds connected to the male member via respective ones of the male member connections, the inner folds being circumferentially offset from the outer folds in a given angular direction.

A method of making a coupling, the method comprising:

• providing a band of material exhibiting plastic deformability arranged on a spool;
• feeding the band of material, from the spool, to a mould, the mould having two forming gears in opposition with one another and rotatably engaged with one another, with the band of material fed between the two forming gears, the forming gears thereby forming the band of material into a corrugated shape;
• folding summits and valleys of the corrugated shape and arranging the folded corrugated shape into an annular configuration around an axis to form a coupling member;
• and
• engaging the coupling member between a radially inner surface of a female member and a radially outer surface of a male member, with outer folds associated to folded summits of the corrugated shape engaged with corresponding connections of the female member and inner folds associated to folded valleys of the corrugated shape engaged with male member connections.