3.3 high speed dynamic pressure bearing motor
With the development of information products in the direction of high efficiency, high density and micro-lightness, the precision of permanent magnet brushless motors is up to 8000~50000r/min. High-speed motor bearings will also replace traditional plain bearings with dynamic pressure bearings to overcome many of the technical problems caused by high speed.
Compared with ball and plain bearings, dynamic pressure bearings have many advantages; they can suppress irregular shaft oscillation, improve impact resistance, long life and low noise. Dynamic pressure bearing motors are available in both fluid and air versions. Generally, fluid dynamic pressure bearings are used at lower speeds, and air dynamic pressure bearings are used at high speeds. Although there are still some technical problems to be further solved in the dynamic pressure bearing motor, the development direction of the high-speed dynamic pressure bearing motor has been generally confirmed.
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