A spherical magnetic suspension bearing device

Abstract

The invention discloses a spherical magnetic suspension bearing device which can act as a three-degree-of-freedom non-contact supporting device of systems like a dynamics simulation platform, a three-degree-of-freedom rotary table and a universal momentum wheel. The spherical magnetic suspension bearing device mainly consists of an upper magnetic bearing, a lower magnetic bearing, position sensors, auxiliary bearings, auxiliary bearing pedestals, a magnetic suspension rotor, an axle seat, a lock nut and the like; the axle seat, the upper magnetic bearing, the lower magnetic bearing, the position sensors, the auxiliary bearings and the lock nut are arranged from the center of the spherical magnetic suspension bearing device to the outside sequentially; the auxiliary bearing pedestals are arranged on the outer sides of the auxiliary bearings; the magnetic suspension rotor is located on the outer side of the whole spherical magnetic suspension bearing device; the inner surface of the magnetic suspension rotor, the outer surface of the upper magnetic bearing, the outer surface of the lower magnetic bearing and the surfaces of probes of the position sensors are concentric spherical surfaces; and the center position of the magnetic suspension rotor is kept constant by a control system and the magnetic suspension rotor has three rotational degrees of freedom. The spherical magnetic suspension bearing device has the advantages of wide movement angle range, simple structure, low cost, high reliability and long service life, and the like.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension bearings, in particular to a spherical magnetic suspension bearing device, which can be used as a multi-degree-of-freedom non-contact support device for systems such as a space dynamics simulation platform, a three-degree-of-freedom turntable, a robot joint, and a universal momentum wheel. Background technique [0002] Devices such as space dynamics simulation platforms, robot joints, three-axis turntables, and universal momentum wheels all require multi-degree-of-freedom motion capabilities. In order to reduce the structural complexity, volume and weight of these devices, and improve their service life and reliability (especially devices working in space environment), so there is an urgent need for multi-degree-of-freedom support systems, especially spherical support mechanisms. In addition, the advancement of spherical motor technology and its application are also limited by spherica...

AI Technical Summary

Problems solved by technology

At present, some large-scale spacecraft attitude maneuvering devices are used in spherical magnetic suspension bearing devices. The US Patent No.: No. 4785212, a large-angle magnetic suspension device with a 1988 structure, has the disadvantages of complex structure, difficult manufacturing and processing, and is only used in large-scale Attitude control of spacecraft; U.S. Patent No.: No.6351049,2002 structure of ball-connected magnetic bearings, if there is a coupling problem, it will lead to difficult control and poor stability. The stator core is made of solid ferromagnetic material, which will lead to large losses and no Protect bearings and non-contact displacement sensors and other devices; due to the above defects, the existing spherical magnetic suspension bearing devices have disadvantages such as complex structure, large power consumption, high cost and difficult control

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