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Motor soft starter based on magneto-rheological grease

A technology of electric motor and soft start, applied in the field of electric motor soft starter and motor power transmission device, can solve the problems of low transmission efficiency, high manufacturing and maintenance cost, and large power loss of liquid viscous soft starter, so as to achieve the goal of manufacturing and maintenance. Low cost, increased damping coefficient control, enhanced stability effect

Inactive Publication Date: 2011-06-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liquid viscous soft starters have low transmission efficiency, large power loss, serious heat generation, complex devices, and high manufacturing and maintenance costs

Method used

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  • Motor soft starter based on magneto-rheological grease
  • Motor soft starter based on magneto-rheological grease

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Experimental program
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Embodiment Construction

[0023] The present invention will be described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the present invention mainly includes a casing 1, a working cylinder 2, an input torque rotating shaft 3, and an output torque rotating shaft 4, and the magnetorheological grease is enclosed in the working cylinder 2. The casing 1 is a cylindrical hollow sealing body, and the working cylinder 2 is a cylindrical hollow sealing body arranged inside the casing 1 and coaxial with the casing 1 . There is a distance between the outer wall of the working cylinder 2 and the inner wall of the casing 1 . An isolation plate 5 is arranged between the inner side wall of the housing 1 and the outer side wall of the working cylinder 2 , and the excitation coil 6 is wound around the cylindrical cavity between the isolation plate 5 and the inner side wall of the housing 1 . The working cylinder 2 can rotate freely in the cavity formed by the isolation plate 5...

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Abstract

The invention relates to a motor soft starter based on magneto-rheological grease, which mainly comprises an input moment assembly and an output moment assembly, wherein the input moment assembly and the output moment assembly are coupled through the magneto-rheological grease; the input moment component comprises an input moment rotating shaft and a shearing ring arranged on the input moment rotating shaft; and the output moment assembly comprises a working cylinder, an output moment rotating shaft and a magnetic channel ring. By utilizing the characteristic that under the action of a magnetic field, the viscosity coefficient of the magneto-rheological grease is changed and then the force transferring characteristic of the magneto-rheological grease is changed, the magneto-rheological grease is used as a medium for transferring a moment from a motor to a load; and a combined magnetic field of an excitation magnetic field generated by an excitation coil and a permanent magnetic field generated by the magnetic channel ring is used as a magnetic field for acting on the magneto-rheological grease, and the magnitude of the magnetic field is controlled by excitation current. After the motor soft starter of the invention normally works, the magneto-rheological grease is nearly cured, so the motor soft starter has the characteristic of large moment transferring rate and effectively avoids the rotation speed loss in the operating process.

Description

technical field [0001] The invention relates to a motor power transmission device, in particular to a motor soft start device based on magneto-rheological grease, which is used for high-power heavy-duty equipment such as conveyors and hoists. Background technique [0002] The soft start of mechanical equipment means that the power machinery disconnects the load when starting, and gradually applies the load after the power machinery operates normally to start slowly and smoothly. For the mechanical transmission system, the soft start technology can ensure the minimum impact energy on the mechanical equipment during the starting process, prolong the service life of the power machinery and other working mechanisms, so it is very necessary for high-power heavy-duty equipment. At present, soft start technology is applied to large hoists and conveyors in mines or port terminals, excavators, tractors and cranes in engineering equipment. [0003] Hydraulic starting methods generall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/16
Inventor 廖昌荣骆静李兴
Owner CHONGQING UNIV
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