Snecma

Fabien Wahl

François Danguy

Philippe Bourdin

Laurent Fabbri

Emmanuel Edeline

Fabien Tessier

Jean-Michel Nguyen Duc

Charles Marciquet

Pump () comprising a rotary shaft (), a bearing housing () that is fixed relative to the rotary shaft, at least one rolling bearing () the inner ring () of which is connected to the said rotary shaft and the outer ring () of which is able to slide in this housing along the axis of rotation of the rotary shaft. The bearing housing () comprises a shoulder () situated on one side of this bearing and able rigidly to prevent translational movement of the outer ring () along the axis of rotation, and a deformable elastic device () fixed to the housing on the other side of the bearing () so that the bearing lies between the shoulder and the elastic device.

Pump with an elastic device on a rolling bearing

A suction stage for a pump with a centrifugal wheel, the suction stage including a rotational impeller equipped with a hub and arranged upstream of the centrifugal wheel, the suction stage further including a diffuser arranged between the impeller and the centrifugal wheel, the diffuser including a plurality of blades. The hub has a downstream surface extending axially so as to converge toward the centrifugal wheel, and the blades of the diffuser have free ends, the blades protruding radially toward the downstream surface.

Impeller and diffuser with a rotating and converging hub

A pump for the drawing-in of a fluid, including at least one centrifugal wheel having a fluid inlet edge and a fluid outlet edge, the pump further including an axial balancing system with a high-pressure flow space defined between the housing and an upstream face of the centrifugal wheel. The axial balancing system further includes a device for substantially increasing the hydrostatic pressure of the fluid circulating in the high-pressure flow space during operation of the pump.

Pump comprising an axial balancing system

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Saint Marcel, France

Fabien Wahl