Skf Magnetic Mechatronics

Aktiebolaget Skf

Jens Anders

Frederic Ponson

Joaquim Da Silva

Luc Baudelocque

Philipp Krebs

Mohamed Bendaoud

Frédéric Ponson

Eddy Herisse

Matthieu Oliva

A landing bearing assembly for a rotary machine having a stator assembly, a rotor assembly and a magnetic bearing. The landing bearing assembly having a stator landing portion integral with the stator assembly and a rotor landing portion integral with the rotor assembly. A first coating, which is an anti-wear and/or an anti-friction coating, is dispensed on at least one of the stator landing portion and the rotor landing portion. The invention also concerns such a rotary machine.

Landing bearing assembly and rotary machine equipped with such an assembly and a magnetic bearing

A rotary machine, comprising: a stator assembly and a rotor assembly centered on a central axis; a magnetic bearing; and an auxiliary bearing including a first ring held in the stator assembly and a second ring delimiting a gap radially to the central axis relative to the rotor. The second ring is not rotating around the central axis in a primary operation mode and is dragged in rotation around the central axis in a secondary operation mode. The rotary machine includes a monitoring system for detecting a transition from the primary operation mode to the secondary operation mode. The monitoring system comprises a target formed on the second ring and a sensor unit fixed relative to the stator assembly. A bearing and a method for manufacturing a rotary machine are additionally disclosed.

Rotary machine, bearing and method for manufacturing a rotary machine

An assembly includes a rotating shaft supported with respect to a stationary housing by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing having first and second coaxially arranged annular surfaces is provided. One of the first and second coaxially arranged annular surfaces defines a clearance (E) with one of the stationary housing and the rotating shaft, the clearance (E) being less than the mean radial air gap and the other of the first and second coaxially arranged annular surfaces being integral with the other one of the stationary housing and the rotating shaft. The auxiliary bearing provides a first ball bearing and a second ball bearing having a misalignment with respect to each other in order to increase the starting torque.

Auxiliary bearing of the ball bearing type for a magnetically suspended rotor system

An assembly that includes a rotating shaft supported with respect to a stationary housing by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing having a bushing fixed to the housing and a sleeve fixed on the rotating shaft. The bushing and the sleeve have opposite surfaces that define a clearance (E2) which is less than the mean radial air gap (E1). The bushing and the sleeve each exhibit symmetry around a longitudinal axis of the shaft and have different profiles in a longitudinal cross-section including the longitudinal axis to optimize the contact pressure distribution when the rotating shaft lands on the auxiliary bearing.

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Vernon, France

Jens Anders