The use of electric force, magnetic force to the sliding shaft bearing suspension. Electric field strength for static bearing suspension, suspension with the magnetic field strength for magnetic bearings, electric field strength and magnetic field strength for a common modular bearing suspension. The latter bearing both electrodes have poles in the circuit connected teach other corresponds to the tuning capacitor and inductor, and its stiffness is much higher than the previous two, and the most vigorous of the corresponding displacement was small. Magnetic bearings for shaft and bearing no direct contact, without lubrication, in vacuum and wide temperature range, friction is small, not the speed limit (speed up to some 23 million rev / min, wire speed up to 3 times the speed of sound), long life, and the structure can be varied. Bearing requires a lot of static electric field strength; the application is limited, only a few meters in use. Magnetic bearings have greater carrying capacity and stiffness, have been used for ultra-high-speed trains, high-speed centrifuges, hydro, spacecraft angular momentum flywheel, flow meters, density meters, power meter, vacuum pump, precision current regulator and gyroscopes, etc. With the magnetic and electronic technology, the application of magnetic bearings is growing.

Electric force and electric field strength, electric displacement and the electrode area is proportional to the magnetic field strength and magnetic field intensity, magnetic intensity and magnetic induction proportional to the area. Appropriate choice of electric or magnetic field parameters and geometry, obtained a certain carrying capacity and bearing stiffness. Electrostatic suction or magnetic attraction and inversely proportional to the square of the distance between objects, according to Yasuji off theorem, this static system is statically indeterminate, so in addition to the use of anti-magnet or superconductor bearings, the static magnetic field in the electrostatic field or to work under bearing is unstable. To enable stable magnetic bearings can be used to adjust the servo device or method to control the circuit parameters. Actual use of magnetic bearings is generally radial bearings, thrust bearings, servo control loop, dampers, speed sensor or position sensor and other components.



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