Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor

Abstract

The present invention relates to technical field of magnetic transmission in mechanical engineering, particularly a high temperature resistant high performance tapered slot type rotor asynchronous magnetic coupling, which comprises an outer rotor with magnetism, a inner rotor without magnetism, separation sleeve, and adjustable magnetic pole piece with teeth; the outer rotor comprises an outer rotor basal body and magnetic pole; the magnetic pole forms a certain helix angle with axial cord; the inner rotor comprises a inner rotor basal body, a magnetic induction prime conductor and end rings; the magnetic induction prime conductor embeds in angular deep groove of the inner rotor basal body in helical shape; the separation sleeve covers the inner rotor and is set between the inner rotor and the outer rotor; the adjustable magnetic pole piece with teeth is fixed on the machine body and can be disposed inside or outside of the separation sleeve; the outer magnetic rotor forms an outer layer air gap with the adjustable magnetic pole piece; the inner rotor forms an inner layer air gap with the adjustable magnetic pole piece. The above structure is disposed on the inside and outside circular conical surface to form circular cone asynchronous magnetic transmission. The advantages of the invention are as following: high temperature resistant, smooth, steady and reliable transmission, high usage of permanent magnet and big transmitting torque of unit volume.

Description

technical field [0001] The invention relates to the technical field of magnetic transmission in mechanical engineering, in particular to a magnetic field modulated high-performance, high-temperature-resistant chute rotor asynchronous magnetic coupling. It is mainly used in transmission devices or equipment with high working temperature and non-leakage requirements in the production environment, especially suitable for magnetic pumps, magnetic stirring tanks, magnetic valves, etc. without shaft seals, leak-free, and high temperature resistance. Background technique [0002] Traditional mechanical couplings are widely used in mechanical transmission connections, and generally use contact to transmit motion and power, which has disadvantages such as large impact, short life, and need for lubrication. At present, the commonly used synchronous magnetic transmission device works according to the principle of repulsion of the same sex and attraction of opposite sex, so the inner an...

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Problems solved by technology

[0003] Chinese patent 200420025250.2 discloses a permanent magnet induction magnetic transmission device. Since the inner rotor does not need permanent magnet materials, it can meet the transmission requirements at high temperature, but the above-mentioned magnetic transmission cannot provide a stronger high-speed rotating magnetic field due to its permanent magnets. In addition, the inner rotor is embedded The radial depth of the strip conductor is small, and the induced current and the distribution of the magnetic force lines generated in the radial direction of the bar are not very different, so the effect of the current extrusion in the inner rotor during operation is not obvious, that is, it is difficult to produce deep grooves. Skin effect, so the transmission performance is restricted

In addition, this kind of magnetic coupling generally operates at a stable speed. When the operating speed changes sharply, for example, the speed becomes small, and the slip rate is too large, the rotor loss will increase sharply, the efficiency will decrease, and the heat will be serious.

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