Magnetic Roller bearing are supported by magnetic force load bearing or suspended form a rotor. This bearing has developed rapidly in recent years, particularly in the high-speed, low friction, high (low) temperature and vacuum environment applications. Magnetic bearings compared with other forms of support has its unique advantages, promising.
Several typical magnetic bearings
1. Permanent magnet-type magnetic bearing
Permanent magnet-type magnetic bearing is made by the permanent magnets can be made into various shapes. Load bearing capacity and stiffness depends on the type of permanent magnet material, pole shape, area, thickness and configuration, the bearing clearance, and the size of the portion of soft magnetic steel. Theoretical calculation of these bearings is very difficult, often using "experiment similar method" design. Is determined experimentally several typical bearing structure, measure its carrying capacity, stiffness. Take the same design as long as the new bearing material, the structure and dimensions according to the ratio that the performance can be calculated in proportion to such bearing capacity of the bearing is proportional to the square of the feature size and so on.
2. AC excitation type passive magnetic bearing
Thrust Slewing bearing are usually combined in pairs, each bearing is an electromagnet. Core geometry is generally E-shaped, U-shaped or annular. Tuning mode of serial and parallel two kinds.
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