Industrial rotary machine having super-conductive magnetic bearing

Abstract

Abstract PURPOSE:To prevent the damage of a magnetic iron plate caused by the contact between a rotator and a stator in the rotary machine in the caption by supporting the rotator in used of an auxiliary bearing in case of any accident on the magnetic flotation system of a magnetic bearing through a process of jointly using a super- conductive magnetic bearing and an ordinary conductive magnetic bearing. CONSTITUTION:During a normal operation, an equilibrium state is kept with out any contact of a rotator 4 to a stator 5 though the magnetic field produced by an electric magnet of a super-conductive magnetic bearing 1. The position of the rotator 4 is manifored by detection sensors 6, while a signal corresponding to its position changes the current of the electric magnet of a constant conductive magnetic bearing 2 through a servo system, and the position of a rotor can be changed. The magnetic field is maintered by the sensor so as to ascertain whether the super-conductive magnetic bearing 1 is in normal operation or not, the in case that electric current does not flow and super-conductive magnetic bearing 1 does not operate ordinarily, the holding of the rotator 4 at a fixed position by magnetic field as well as by the position adjustment can be achieved by varying the electric current of the magnet of the constant conductive magnetic bearing 2.

Inventors

• 👤 Masao Furukawa
• 👤 Junshi Shimomura

Bibliographic Details