Snecma

Arianegroup Sas

Laurent Collongeat

Philippe Bourdin

Dominique Le Louedec

Philippe Even

Frederick Millon

Charles Marciquet

Frédérick Millon

Dominique Le Louëdec

Patrice Fonteyn

Guillaume Chemla

A turbopump includes a turbine fed with hot gas, a pump driven by the turbine and fed with liquid fluid, and a hot gas exhaust pipe situated downstream from the turbine. The turbopump includes a bleed-and-injection circuit including a bleeder for bleeding the liquid fluid at the outlet from the pump, a heater for heating the liquid fluid as bled off in this way so as to transform it into gaseous fluid, and an injector for injecting the gaseous fluid into an interface region of the turbopump situated between the pump and the turbine, so as to optimize the flow and temperature conditions of the fluid entering into the turbine cavity in order to eliminate the vibratory phenomena that result from interaction between the fluid and the turbine disk.

Turbopump with anti-vibration system

In a disengageable axial abutment for a rotary machine fitted with fluid bearings, an outer ring () comprises first and second outer half-rings (A,B) centered in the casing () by a flexible suspension system, with the outer half-rings (A,B) being held in the axial direction between a static abutment member () and a pre-loading system () exerting a predetermined axial force such that, so long as the axial load exerted on the axial abutment via a synchronization cone () is greater than a given threshold, each rolling element () presents a single line () of two points of contact (A,B) with an inner ring () and with the first outer half-ring (A) respectively, and the inner ring () is driven in rotation by the synchronization cone (), whereas, when the axial load exerted on the axial bearing becomes smaller, a gap () is created between the outer half-rings (A,B) and a second line () of two additional points of contact (A,B) is created between each rolling element () and the inner ring () and the second outer half-ring (B) respectively, such that the axial abutment is disengaged.

Disengageable axial abutment

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Vernon, France

Laurent Collongeat