Permanent magnet eddy current speed regulator

Abstract

The invention provides a permanent magnet eddy current speed regulator which comprises two outer rotor discs, two inner rotor discs, a speed regulation disc, an execution mechanism, an input end cover and an output end cover, wherein a copper plate is fixed to the inner sides of the two outer rotor discs, permanent magnets are placed inside the two inner rotor discs, the speed regulation disc is fixed to a transmission shaft through a flat key, the execution mechanism is fixed to the speed regulation disc and connected to a fixing base, the input end cover is used for connecting a guide rod with one inner rotor disc, the output end cover is used for pressing a bearing on the other inner rotor disc and an outer rotating sleeve, and a rotating arm is fixed to the circumference of the outer rotating sleeve. The speed regulation disc is concentric with the inner rotor discs and hinged to the two inner rotor discs through connecting rods respectively. Under the condition that the rotating speed of a motor is unchanged, when a rotating arm is operated, the two inner rotor discs axially slide along the transmission shaft in the opposite directions with the speed regulation disc being the center. Compared with the prior art, the permanent magnet eddy current speed regulator has the advantages that load speed regulation accuracy and reliability can be improved, better mechanical performance is achieved, and vibration and noise of a transmission system can be lowered.

Description

technical field [0001] The invention relates to the technical field of permanent magnet transmission, in particular to a permanent magnet eddy current governor capable of adjusting the rotational speed of a load under the condition that the rotational speed of a motor remains constant. Background technique [0002] Permanent magnet speed control technology is a breakthrough new technology specially developed for speed control and energy saving of fans and pump centrifugal loads in recent years. It has the characteristics of high efficiency and energy saving, high reliability, no rigid connection to transmit torque, can be applied in harsh environments, greatly reduces the overall system vibration, reduces system maintenance and prolongs the service life of the system, etc. In particular, permanent magnet speed regulation does not generate high-order harmonics, and does not cause motor heating at low speeds, and has excellent speed regulation characteristics. Therefore, it ha...

AI Technical Summary

Problems solved by technology

[0005] Chinese invention patent (publication number CN1248354A) discloses a permanent magnet coupler that controls the load speed by adjusting the air gap between the conductor rotor and the permanent magnet. The cam groove of this coupling adjustment device is exposed on the outer surface and is easily blocked by dust. Requires frequent cleaning and lubricating

At the same time, the entire inner rotor assembly is installed on the load end, which deteriorates the force on the load end

In addition, the Chinese utility model patent (CN201854168U) discloses a coupler that uses a rack and pinion structure to adjust the air gap between the permanent magnet and the conductor rotor. The rack and pinion mechanism requires high machining accuracy and is difficult to install. The entire inner rotor assembly It is also installed on the load end, and the force on the load end is also poor

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