Onesubsea IP UK Limited

Ifp Energies Nouvelles

Erik A Torbergsen

Audun Magne Askeland

Anders Brunvold

Hans Fredrik Kjellnes

Åsmund Valland

Philippe Pagnier

Ina Ekeberg

Veronique Penin

Véronique Penin

A diffuser for a fluid compression device includes at least one vane mounted on a hub. The at least vane includes at least one opening () starting at a distance ranging between 10% and 60% of the axial length of the vane. The diffuser can be used in a fluid compression device also including a housing, at least one impeller within the housing, the impeller including at least one vane, the diffuser being arranged within the housing, upstream or downstream from said impeller.

Diffuser for a fluid compression device, comprising at least one vane with opening

In rotating machine having a vertically oriented rotating shaft, a static magnetic force is used to simulate rotor weight and create the desired bearing preload. By installing a magnet the gravity based preload on the shaft journal bearings of a horizontal machine can be simulated for a vertical shaft. This can increase rotor stability, reduce the machine's vulnerability to hydraulically induced imbalance forces and give a more smooth transition through various shaft speeds.

Magnetic preloading of bearings in rotating machines

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Bergen, Norway

Erik A Torbergsen