Magnetic field modulation magnetic gear

Abstract

The present invention provides a magnetic field modulated magnetic gear, including a casing, an outer rotor and an inner rotor mounted in the casing chamber, the inner rotor is composed of an inner rotor core, 2N1 permanent magnets, and the polarity of the adjacent permanent magnets are different, the inner rotor is mounted on the output shaft of the inner rotor; the outer rotor is composed of a cup type sleeve, an outer rotor core, N2 permanent magnets, and the polarity of all N2 permanent magnets are identical, the cup type outer rotor is mounted on the output shaft of the outer rotor; the magnetic field regulating ring is composed of N1+N2 core blocks and N1+N2 epoxy blocks, the magnetic field regulating ring is fixed on the end plate of the casing; the magnetic gear has two layers air gap, the inner air gap is between the inner rotor and the magnetic field regulating ring, the outer air gap is between the outer rotor and the magnetic field regulating ring. The invention has advantages of high torque transmitted per volume; and the outer rotor adopts a staggered distribution structure of the permanent magnets and the stator core, saving quantity of the permanent magnets, improving the credibility, simplifying the structure, reducing the cost.

Description

technical field

[0001] The invention relates to a magnetic gear, in particular to a magnetic field modulation magnetic gear. Background technique

[0002] Compared with mechanical gears, magnetic gears have the following advantages: 1) It can reduce mechanical noise and vibration; 2) Magnetic gears do not require lubrication, so they can reduce maintenance and increase system reliability; 3) Magnetic gears have accurate peak torque Transmission capacity, when the load is seriously overloaded, it has overload protection capability; 4) The torque input and output are non-contact, which has great advantages in the drive of toxic and harmful fluid pumps; 5) Due to the realization It ensures non-contact torque transmission and reduces mechanical loss, so the efficiency of magnetic gears is higher than that of mechanical gears; 6) The permanent magnets of magnetic gears are directly installed on the rotor surface, unlike mechanical gears, which require finishing and heat treatment...

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