초록 ▼

A rotor shaft (200) for a magnetic bearing device (1) is disclosed. The shaft comprises an inner portion on whose periphery a plurality of targets (240, 260, 280) separated by spacers (250, 270) are mounted. This is achieved exerting an axial pressing force (F, F′) to the peripheral parts, rather th

A rotor shaft (200) for a magnetic bearing device (1) is disclosed. The shaft comprises an inner portion on whose periphery a plurality of targets (240, 260, 280) separated by spacers (250, 270) are mounted. This is achieved exerting an axial pressing force (F, F′) to the peripheral parts, rather than applying a radial press fit. In this manner, a simplified construction, a higher stiffness and a higher stability at high rotational speed are achieved. Further disclosed is a rotor having a thrust disk (220) whose diameter decreases towards the periphery. This allows to use a larger thrust disk at a given rotational speed.

대표청구항 ▼

The invention claimed is: 1. A rotor shaft for a magnetic bearing device, the rotor shaft being configured for rotation about a rotation axis, the rotation axis defining an axial direction, the rotor shaft comprising:an inner shaft portion andat least one substantially annular target for an electrom

The invention claimed is: 1. A rotor shaft for a magnetic bearing device, the rotor shaft being configured for rotation about a rotation axis, the rotation axis defining an axial direction, the rotor shaft comprising:an inner shaft portion andat least one substantially annular target for an electromagnet, said target being disposed on a periphery of said inner shaft portion and having an inner circumference and an outer circumference, said target being held between two collars exerting an axial pressing force on said target in a manner such that said axial pressing force is strongest in a range closer to the outer circumference of the target than to the inner circumference of the target.