A self-generating magnetic bearing

Abstract

The invention discloses a self-generating magnetic bearing and relates to a bearing. The self-generating magnetic bearing comprises a bearing main body, wherein a plurality of iron cores are uniformly and circumferentially arranged in the bearing main body, the iron cores are wound with electromagnetic coils, a power generating device is arranged outside the bearing main body, the power generating device is connected with the electromagnetic coils and comprises a stator needing to be sleeved on a spindle, the stator is provided with a plurality of groups of stator windings uniformly, a permanent magnet matched with the stator winding is arranged on the spindle, a plurality of annular channels re arranged in the stator, a cooling box is arranged outside the annular channels, and cooling liquid is contained in the annular channels in a flowing manner. Compared with the prior art, by rotation of the spindle, electric power of the magnetic bearing is obtained to supply power for the coil, so that the magnetic bearing and the spindle produce a magnetic suspension effect, and the magnetic bearing also works all the time when the spindle works, thus avoiding the problems of the prior art that as the magnetic bearing and the spindle respectively belong to two sets of power supply systems, a bearing rotating at high speed is damaged and fractures and then a motor is in danger if power of the magnetic bearing fails.

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, a self-generating 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. This is very easy to cause damage to the shaft, which is even more serious. The shaft will break or the motor will be scrapped directly

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