Patent ID: 7952247
Filing Date: 2011-05-31
Classification: F16C,H02K

Abstract:
1. An electrical machine, comprising: a stator; a shaft rotatably received in the stator; a magnetic bearing assembly guiding the shaft; and a safety bearing assembly responsive in the event of a failure of the magnetic bearing assembly by holding and guiding the shaft as the shaft moves to a standstill, said safety bearing assembly comprising an outer ring which is mounted on the stator via a spring or damper assembly and has a U-shaped profile to define a base and two limbs extending from the base, wherein one of the limbs of the U-shaped outer ring is formed by a removable annular web, said safety bearing assembly comprising a rotatable ring which is guided in the spring or damper assembly in a sliding manner, wherein the rotatable ring is comprised of an intermediate ring and an inner ring which surrounds the shaft and is guided in the intermediate ring in a sliding manner.