Snecma

Snecma Moteurs

Jerome Mace

Claude R Lejars

Bruce Pontoizeau

Patrick Reghezza

Christophe Follonier

Thierry Niclot

Unbalanced mass effects can occur at the low pressure compressor () of an aircraft engine. Stiffeners () are proposed to increase the stiffness of the assembly and therefore reduce possible cracks due to accidental unbalanced masses, one end () of the stiffener can be fixed to the engine casing () at the structural arm (), and the other end () can be fixed to the compressor (), preferably at the upstream face of the third guide vane (RD). Advantageously, the stiffeners () are made of two parts fixed to each other; their manufacturing is optimized to limit the additional weight due to their presence.

Stiffener for low pressure compressor for an aircraft engine

The invention relates to a bladed disk for a turbomachine, the disk including blades which extend into a conical stream and which are held in a peripheral groove of said disk by hammerhead type fasteners, each of said blades further including a platform whose radially-outer face defines the boundary of the gas flow stream and whose radially-inner face presents an upstream rib and a downstream rib disposed in planes that are perpendicular to the axis of rotation of said disk and that are radially adjacent respectively to an upstream ring and a downstream ring formed at the periphery of said disk on either side of said groove in order to provide leaktightness in these zones, wherein the thickness of the downstream rib in the axial direction is greater than the thickness of the upstream ring.

Retention capacity of a blade having an asymmetrical hammerhead fastener, with the help of platform stiffeners

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Melun, France

Jerome Mace