Magnetic coupling

Abstract

A magnetic coupling relates to a transmission device, and is simple in process, easy in assembly, firm in fixing of permanent magnets, high in use reliability and capable of preventing the permanent magnets from shedding and from sliding along the surface of a rotor. Two end rings are integrally made at two ends of a sleeve respectively, a plurality of rectangular grooves are uniformly arranged on the outer circumferential surface of each end ring, partitions are axially arranged on the outer side of the sleeve, two ends of the partitions are inserted into the corresponding rectangular grooves of the end rings, a mounting groove is formed among the outer side of the sleeve, each two adjacent partitions and the two end rings, a plurality of outer permanent magnets are inlaid in the mounting grooves, the sleeve inlaid with the outer permanent magnets and the two end rings are placed in a shell together, the two end rings are connected with the shell, the outer edge of the radial cross section of an inner rotor yoke is a polygon, an inner permanent magnet is adhered on each outer side of the inner rotor yoke, the inner rotor yoke adhered with the inner permanent magnets is placed in a casing together, and the casing is placed in the sleeve. The magnetic coupling is used for motors.

Description

technical field [0001] The invention relates to a transmission device, in particular to a magnetic coupling. Background technique [0002] In the existing magnetic coupler, the permanent magnets are mostly tile-shaped structures, which are fixed on the inner surface of the outer rotor and the outer surface of the inner rotor in the form of glue. During the sticking process of the permanent magnet, the permanent magnet should be pressed tightly on the surface of the rotor until it sticks firmly. Since the polarities of adjacent permanent magnets are opposite, the attractive force generated between them will affect the positioning of the permanent magnet on the surface of the iron core. There are certain difficulties. If the number of pole pairs of permanent magnets of the magnetic coupler is large, the whole pasting process is very time-consuming and labor-intensive. The biggest weakness of the adhesive fixing form is that the adhesive is very sensitive to temperature. At hig...

AI Technical Summary

Problems solved by technology

[0003] In the existing fixing technology of the permanent magnet on the outer rotor of the magnetic coupler, there is also a mounting hole in the middle part of the permanent magnet, and a threaded hole corresponding to the mounting hole of the permanent magnet is opened on the housing of the magnetic coupler. Screws fix the permanent magnets on the shell, and at the same time, there are non-magnetic partitions between the permanent magnets, and a protective sleeve is placed on the inner surface of the permanent magnets to realize the fixing of the permanent magnets. As far as the mounting hole is concerned, the radial force on the part around the mounting hole is relatively concentrated, and the pressure is high, which is easy to cause the permanent magnet to break and break. The existence of the mounting hole will also affect the distribution of the magnetic field, thereby affecting the performance of the magnetic coupler. It also does not play a role in hindering the sliding of the permanent magnet. For a magnetic coupler with a large number of permanent magnet poles, this permanent magnet fixing structure is time-consuming and labor-intensive, and there is also the problem of simultaneous positioning of the permanent magnet and the separator.

Images