Speed regulator

Abstract

A speed regulator disclosed by the present invention comprises a first rotating mechanism and a second rotating mechanism, the first rotating mechanism comprises a first cylinder, the first cylinder is provided with a conductor, the second rotating mechanism comprises a second cylinder coaxially arranged with the first cylinder, and the second cylinder is provided with a plurality of permanent magnets at intervals. The permanent magnets surround the second cylinder in the circumferential direction, the magnetic pole directions of the adjacent permanent magnets are opposite, the first cylinder and the second cylinder are kept in a non-contact coupling state, and the conductor generates eddy current and forms an induced magnetic field. The first rotating mechanism drives the second rotating mechanism to rotate through interaction of an induced magnetic field and a permanent magnet magnetic field, the rotating speed of the second rotating mechanism is changed by changing the coupling area of the first cylinder and the second cylinder, and an insulating part is arranged on the conductor. The conductor is divided into a plurality of conductors along the axial direction by the insulating parts, and the speed regulator is large in speed regulation range and is more suitable for loads such as fans.

Description

technical field [0001] The invention is used in the field of mechanical transmission, and in particular relates to a speed governor. Background technique [0002] The permanent magnet speed governor generates relative motion between the permanent magnet and the conductor, so that the conductor generates eddy current in the transformed magnetic field, generates a repulsive magnetic field and interacts with the original magnetic field to make the rotor rotate. As the coupling area decreases, the speed of the driven-end rotor also decreases. [0003] As a magnetic transmission device, the permanent magnet governor can transmit torque between the motor and the load without contact, which eliminates the mechanical vibration caused by the mechanical contact between the motor and the load, and also has functions such as soft start and overload protection. It has been well applied in many industrial fields, such as fans, pumps, conveyors, etc. At present, the torque peak value of t...

AI Technical Summary

Problems solved by technology

[0003] As a magnetic transmission device, the permanent magnet governor can transmit torque between the motor and the load without contact, which eliminates the mechanical vibration caused by the mechanical contact between the motor and the load, and also has functions such as soft start and overload protection. It has been well applied in many industrial fields, such as fans, pumps, conveyors, etc. At present, the torque peak value of the speed-torque characteristic curve of the high-power governor is very high, but after the torque reaches the peak value, the With the increase of slip, the torque decline trend is relatively large, which cannot be well adapted to fan loads, which will cause the speed range of the governor to be too narrow, and the function of the governor cannot meet the actual needs

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