High-temperature rotating type rare earth hoisting permanent magnet

Abstract

The invention discloses a high-temperature rotating type rare earth hoisting permanent magnet and belongs to the technical field of hoisting equipment. The novel high-temperature rotating type rare earth hoisting permanent magnet is low in manufacturing cost. The high-temperature rotating type rare earth hoisting permanent magnet is composed of a driving device and a magnetic circuit. The magnetic circuit is designed into a rotating magnetic system and a fixed magnetic system by means of the magnetic field superposition principle, and the rotating magnetic system can rotate by 180 degrees under the action of the driving device so that the magnetic field on the work magnetic pole face can doubly attract articles and the articles are released in a counteracting mode. Permanent magnet bodies in the magnetic system do not make contact with a magnetic yoke face (there are gaps between the permanent magnet bodies and the magnetic yoke face). By changing the magnetic yoke height and designing the rare earth NdFeB permanent magnet bodies which are provided with movable magnetic pole heads and low in price and work at the temperature about 200 DEG C, the designed magnetic circuit is greatly optimized. Steel attracted articles at the temperature of about 600 DEG C can be attracted, and the weight attracting capacity is high. The hoisting magnet has the advantages of being simple and firm in structure, long in service life and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of hoisting equipment Background technique [0002] Patent No. 91225070.4 is a high-temperature rotary rare-earth lifting permanent magnet. It consists of a drive device, a shell made of magnetically conductive steel, and a magnetic circuit. However, the magnetic circuit design of this high-temperature rotary rare earth permanent magnet has the following disadvantages: [0003] 1. The so-called fixed magnetic system is to put a permanent magnet into a part of the inner surface of the outer yoke and one surface of the opposite inner yoke. The permanent magnet and the two surfaces are attracted to form a fixed magnetic system of a certain shape. The upper surface of the rectangular permanent magnet of the fixed magnetic system of the magnetic circuit of the lifting permanent magnet in the above-mentioned patent is attracted to the inner surface of the top of the outer yoke. The heat of the absorbed object w...

AI Technical Summary

Problems solved by technology

But there is no heat insulating material between the bracket and the two sides of the fixed permanent magnet

[0004] 2. Rare-earth permanent magnets (all made of samarium-cobalt) used in the magnetic circuit are expensive, resulting in high-temperature lifting permanent magnets that are expensive and difficult to popularize and apply

[0005] 3. The working magnetic pole head of the magnetic circuit is not movable, so that the magnetic pole surface cannot be completely attracted to the attracted surface when the surface of the absorbed steel is uneven, resulting in a decrease in the suction force of the lifting permanent magnet. Increased cost of magnets

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