Modular radial single-freedom-degree hybrid magnetic suspension bearing

Abstract

The invention discloses a modular radial single-freedom-degree hybrid magnetic suspension bearing. Each module unit structure comprises two stator iron cores, permanent magnets, a rotor iron core and control coils; the rotor iron core is coaxially fixed to a rotating shaft; the two stator iron cores are both semi-ring-shaped bodies; the two ends of the two stator iron cores are in butt joint through the permanent magnets, and the two stator iron cores are arranged on the two symmetrical sides of an outer ring of the rotor iron core in a sleeving mode to form an annular stator; tooth parts of the two stator iron cores are located at the two ends; the middle of each stator iron core is a yoke part, and each control coil is wound on the corresponding yoke part; and working air gaps are reserved between the magnetic poles at the two ends of the stator iron cores and the rotor iron core. One module unit structure controls movement of a rotor in one freedom degree, and movement of the rotor in the other freedom degree can be controlled by rotating modules with the same structures by 90 degrees. According to the modular radial single-freedom-degree hybrid magnetic suspension bearing, the different module unit structures can be separately controlled, thus, control magnetic fields in different directions are decoupled from one another, a control system is convenient to design, and the flexibility is achieved.

Description

technical field [0001] The invention relates to a magnetic suspension bearing, in particular to a modular radial single-degree-of-freedom hybrid magnetic suspension bearing. Background technique [0002] Magnetic suspension bearing is a new type of bearing that uses magnetic force to generate bearing capacity and suspends the rotor so that there is no mechanical contact between the rotor and the stator. Compared with other traditional bearings, it mainly has the advantages of no mechanical contact and controllable characteristics. No mechanical contact enables the rotor to achieve high speed, low energy consumption, and no need for lubrication; the controllable characteristics make the overall system more flexible and intelligent, and can monitor the working status online, which has broad prospects in industrial applications. [0003] Magnetic bearings can generally be divided into three categories according to the source of the magnetic field: active magnetic bearings (ele...

AI Technical Summary

Problems solved by technology

However, there are some deficiencies in the existing hybrid magnetic suspension bearing structure design: in most structural designs, the coil is wound on the magnetic pole, and the coil needs a certain space to accommodate, resulting in an excessively large outer diameter of the bearing; most of the structural design is based on two The degree of freedom is controlled at the same time, or even three or five degrees of freedom are considered at the same time. In this case, it is necessary to concentrate several longer parts of the rotating shaft to install the bearing. Therefore, the rotating shaft often needs to be designed according to the structure of the magnetic suspension bearing. manufacturing; most of the structural design is carried out according to specific working conditions. After the working conditions change, the structure of the magnetic bearing cannot be adjusted accordingly; some structures are too complex and difficult to manufacture; some structures have coupling phenomena in the magnetic fields in different directions, increasing The complexity of the control system affects the reliability of the bearing

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