Snecma Moteurs

Snecma

Pierre Lamothe

Alain Paul Madec

Alain Bassot

Patrick Reghezza

Philippe Even

Jean-Luc Goga

Jean-Claude Bonny

A fan rotor includes a disk having a rim with a plurality of substantially axial grooves that are spaced apart angularly. Removable blades extend radially outwards from the periphery of the disk. Each blade has a blade root in a respective groove. A downstream flange plate can be secured to the disk with the downstream faces of the blade roots being in abutment against the downstream flange plate. An upstream flange plate is secured to the disk so as to retain the blade roots in the grooves. In the rotor, the upstream flange plate is fitted on its downstream face with a resilient device configured to exert sufficient force on the upstream faces of the blade roots, after assembly, to prevent an axial displacement of the blades during normal operation (apart from exceptional events of the type in which foreign bodies are ingested or blades are lost).

Controlling the axial position of a fan blade

A rotary assembly comprising a disk having recesses at its periphery; a plurality of blades carried by the disk, each blade having a blade root engaged in a corresponding recess of the disk, and a plurality of fitted platforms each mounted on the disk between two adjacent blades, each platform being a piece of sheet metal of substantially omega section having two flanks interconnected by a web and shaped so as to press against the side walls of the bottom portions of two adjacent blades, with the end portions of the flanks presenting respective setbacks which fit closely to the outlines of one side of a blade root and of the adjacent side of the wall of a recess in which the blade root is received.

Blade platforms for a rotor assembly

Growing community of inventors

Saint-Paul/Save, France

Pierre Lamothe