Magnetism-adjustable permanent magnet eddy current governor

Abstract

The invention discloses a magnetism-adjustable permanent magnet eddy current governor which comprises a gear motor (1), an electric brush (2), a bevel gear mechanism (3), a bearing shaft (4), a slip ring (5), a right bearing (6), a cam rotor (7), a permanent magnet rotor right end cover (8), a right end ring (9), a permanent magnet rotor (10), a permanent magnet rotor left end cover (11), a lower magnetic ring (12), a left end cover (13), a left bearing (14), a driving shaft (15), an upper magnetic ring (16), a left end ring (17), a conducting bar (18) and a driving end iron core (19), wherein the gear motor (1) is mounted at an drive end of the cam rotor (7). According to the governor, gaps between the inner side of the permanent magnet rotor and the upper and the lower magnetic rings are adjusted through the cam rotor, and excitation capacity of the permanent magnet rotor is changed, so that the size of an air-gap field is changed, and purposes of torque coupling and speed regulation are achieved.

Description

Technical field: [0001] The invention relates to a permanent magnet eddy current speed regulator, in particular to a magnetically adjustable permanent magnet eddy current speed governor, which belongs to the technical field of eddy current transmission. Background technique: [0002] Generally, mechanical transmission mainly connects the load to the power shaft through mechanical equipment through chain transmission, friction transmission, hydraulic transmission, gear transmission and belt transmission. Mechanical transmission has problems such as mechanical wear and high-frequency oscillation. In addition, although the peak value of the starting current has nothing to do with the size of the load when the motor is started, direct starting with a large load will prolong the starting time of the motor, increase the heat and temperature rise of the motor, and affect the service life of the motor. In order to avoid this problem, the user should increase the motor capacity as mu...

AI Technical Summary

Problems solved by technology

However, in practical applications, since the length of the air gap is not large, the range is only between a few millimeters and a few centimeters, the attraction between the permanent magnet rotor and the conductor rotor is very large, and the magnetic force to be overcome to adjust the air gap length is very large. Not only is the mechanism difficult to implement, but the accuracy and smoothness of the air gap adjustment cannot be guaranteed

In addition, the coupling torque can be adjusted by adjusting the meshing length between the permanent magnet rotor and the conductor rotor, so as to realize load speed regulation. However, as the meshing area of ​​the permanent magnet rotor decreases, part of the permanent magnet will be directly exposed, and it will attract surrounding magnets. Metal fragments in the air, magnetic dust in the air, machine tool tools, etc. These sundries are attracted to the surface of the permanent magnet rotor and even enter the working air gap, which will seriously affect the normal operation of the governor.

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