An Active Magnetic Bearing

Abstract

The invention discloses an active magnetic bearing and relates to a bearing. The active magnetic bearing comprises a bearing main body. A plurality of iron cores are arranged in the bearing main body evenly and circumferentially. Electromagnetic coils are wound around the iron cores respectively. Power generation equipment is arranged outside the bearing main body and connected with the electromagnetic coils. The power generation equipment comprises a stator needing to be arranged on a main shaft in a sleevimg mode. The stator is provided with a plurality sets of stator windings evenly. The main shaft is provided with permanent magnets matched with the stator windings. A heat dissipation channel is further formed in the bearing. The iron cores are provided with heat dissipation grooves matched with the heat dissipation channel. A radiator is connected outside the heat dissipation channel. Cooling liquid capable of flowing is contained in the heat dissipation channel. Compared with the prior art, according to the magnetic bearing, electric power is obtained through rotation of the shaft to supply the power to the coils, so that the magnetic suspension effect is generated through the magnetic bearing and the shaft, and the magnetic bearing also works all the time when the shaft works. Therefore, the problems that when the magnetic bearing and the shaft separately belong to two sets of power supply systems before, once the magnetic bearing is de-energized, the shaft rotating at a high speed is damaged and fractured to endanger a motor are solved.

Description

technical field [0001] The invention relates to a bearing, especially a magnetic bearing. Background technique [0002] Magnetic bearing is a new type of high performance bearing. Compared with traditional ball bearings, sliding bearings and oil film bearings, magnetic bearings have no mechanical contact, and the rotor can reach high operating speeds. It has small mechanical wear, low energy consumption, low noise, long life, no lubrication, and no oil pollution. And other advantages, especially suitable for high-speed, vacuum, ultra-clean and other special environments. It can be widely used in machining, turbomachinery, aerospace, vacuum technology, identification and testing of rotor dynamic characteristics, etc., and is recognized as a promising new type of bearing. Magnetic bearings can be divided into the following three categories according to the way the magnetic force is provided: active magnetic bearings, also known as active magnetic bearings, the magnetic field...

AI Technical Summary

Problems solved by technology

However, an active magnetic bearing needs power supply. Once the power supply is interrupted, the magnetism will disappear. At this time, the high-speed rotating shaft cannot be suspended in the magnetic bearing, and the friction will increase instantly, which is very easy to cause damage to the shaft. More serious It will break the shaft or directly make the motor scrapped

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