A coaxial sleeve type permanent magnet eddy current coupling with fixed end faces

Abstract

The invention provides a coaxial sleeve type permanent magnetic eddy-current coupler with a fixed end face and belongs to the technical field of permanent magnetic eddy-current transmission. The coaxial sleeve type permanent magnetic eddy-current coupler with the fixed end face can ensure automatic coaxial positioning in the installation and running process and greatly reduces the installation difficulty and workloads, the gravity and external acting force applied on the permanent magnetic eddy-current coupler can be directly transmitted to a stator of a motor in the operating process, and a rotary shaft system of the motor can be prevented from bearing additional external force. The coaxial sleeve type permanent magnetic eddy-current coupler comprises a driving rotor, a driven rotor and an end face locating base, wherein the driving rotor, the driven rotor and the end face locating base are coaxially arranged. The driving rotor serves as an outer rotor and is composed of a driving rotor body and a vortex ring or a permanent magnet layer fixedly arranged on the driving rotor body. The driving rotor body is composed of a hollow mandrel, an outer lining cylinder and a middle supporting plate. The end face locating base is arranged on the hollow mandrel. The end face locating base is composed of an end face locating disk and a bearing pedestal. The driven rotor serves as an inner rotor and is composed of an end cover shaft, a cylindrical driven rotor body and a vortex ring or a permanent magnet layer fixedly arranged on the driven rotor body.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet eddy current transmission, in particular to a coaxial sleeve type permanent magnet eddy current coupling with fixed end faces. Background technique [0002] The basic working principle of permanent magnet eddy current transmission technology is: when the permanent magnet rotor and the eddy current ring rotor make relative rotation motion, the permanent magnets arranged alternately in the direction of magnetic poles on the permanent magnet rotor will generate alternating currents in the eddy current ring made of conductive materials. The magnetic field is changed, and then an alternating eddy current is induced in it, and the eddy current generates an induced magnetic field in the eddy current ring, and the induced magnetic field interacts with the constant magnetic field on the permanent magnet rotor, so that the magnetic field between the two rotors Generate coupling torque, so as to ach...

AI Technical Summary

Problems solved by technology

[0003] However, the existing patented technology of permanent magnet eddy current transmission generally does not pay enough attention to the positioning and connection methods of the permanent magnet rotor and the eddy current ring rotor. The existing coaxial sleeve type permanent magnet eddy current coupling products usually use the following two types One of the ways to realize the installation and positioning of the two rotors: one is to directly set the rotor body on the prime mover or the drive shaft of the load by using the connecting sleeve; the other is to set up special brackets to support the two rotors separately, Connect the shaft of the prime mover and load with the shafts of the two rotors using the coupling parts

These two connection methods have obvious disadvantages: the former connection method applies all the weight and force of the rotor directly on the prime mover or the rotating shaft of the load, especially when the pulley or gear is directly installed. The radial force greatly increases the force of the prime mover or the supporting bearing of the load shaft, resulting in poor working conditions, increased vibration noise, and reduced effective working life; the latter connection method is due to the addition of one or two It is more difficult to ensure the coaxial positioning of the rotating shaft between the prime mover, the load and the bracket, which brings great inconvenience to the installation work, and also brings more excitation sources and uncertain and harmful factors to the system operation.

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