Turbomeca

Safran Helicopter Engines

Pascal Pierre Le Brusq

Lionel Scuiller

Jean-Philippe Ousty

A method to prevent blockage of air passages in curvic couplings between drive parts and to prevent potential damage to the drive parts during weakening of protective elements. To this end, axial abutments are formed by ring gears of the curvic couplings. A coupling includes two rings, each ring being on the end of one drive part and engaged with the other so as to transmit to the drive part a rotation around a central axis while allowing air to pass between male and female portions of the teeth of the rings behind a bearing area. The rings are extended in an at least partially radial manner relative to each other to form an outer ring extension and an inner ring extension respectively facing elements surrounding the drive part that are mounted onto the other ring. The rotor lines can be used in turbine engines.

Method for protecting the passage of air in a drive part coupling in an unprotected environment, coupling for implementation, and rotor line fitted with such couplings

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Idron, France

Pascal Pierre Le Brusq