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Magnetic rheological soft startor

A soft start, magnetorheological technology, applied in the direction of fluid clutch, clutch, mechanical equipment, etc., can solve the problems of easy mechanical shock, narrow slip range, large impact on the life of mechanical devices, etc., to achieve extended life, slip The effect of increased range and reduced operating temperature

Inactive Publication Date: 2008-01-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jaw clutches and friction plate clutches only have two states of on and off, so they are prone to mechanical shocks when starting, which has a great impact on the life of the mechanical device. At the same time, frequent adjustments and replacements are required during use.
U.S. Patent US005896965, Magnetorheological fluid fan clutch (magnetorheological sector clutch), announced a magnetorheological single disc clutch, which introduces a new type of intelligent material magnetorheological fluid as a power transmission medium, through the magnetic field generated by the electromagnetic coil to change its Rheological characteristics, can control the transmitted torque, the disadvantage is that it can only be used to transmit small torque occasions
U.S. Patent US005779013, Torque transfer apparatus using magnetorheological fluids (magnetorheological fluid torque transfer device), announced a magnetorheological multi-disk torque transfer device, with a multi-disk instead of a single disc, there are multiple discs The magnetorheological fluid in the radial gap participates in the work and can transmit large torque, but there is no cooling device and the slip range is narrow

Method used

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  • Magnetic rheological soft startor
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Embodiment Construction

[0021] Referring to attached drawings 1 to 7, the magnetorheological soft starter adopts the rotor structure of the main and driven parts, the torque is input through the driving shaft 1 and the driving part, and a magnetic field is generated under the action of the electromagnetic coil to change the rheological characteristics of the magnetorheological fluid , through its transmission, the torque is output through the driven member and the driven shaft 23.

[0022] The invention improves the structure of the main and driven parts: the cavity of the driving part is filled with a driven part whose shape matches with it, and the two maintain a working distance of 0.5-2mm, and the magnetorheological fluid 7 is installed in the gap, and the magnetic The rheological fluid has the advantages of low zero-field viscosity, fast response time, high dynamic yield stress, low excitation voltage, etc., and is very suitable as a medium for transmitting torque; when the coil 9 is energized, i...

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Abstract

A magnetic rheological soft starter is used in mechanical transmission. In order to eliminate impact of clutch during starting, new material magnetic rheological fluid (MRF) is introduced as the power transmission medium, and magnetic field electromagnetic winding produces is used in altering the rheological characteristic and controlling transmitted torque to reach the aim of smooth starting. For small structure, great torque and reduced heat produced during operation, the present invention makes driving part in cavity holding driven part, adopts two electromagnetic windings to control the rheological characteristic of MRF in radial and axial work gap, and mounts heat pipe to the end cap of the driving part to lower its temperature. The present invention is used mainly in soft starting of mechanical unit, power transmission, speed regulation and overload protection.

Description

Technical field: [0001] The invention relates to a mechanical power transmission device, which is mainly used for power transmission and speed regulation between a prime mover and a working machine, or between a driving shaft and a driven shaft in the same machine, and can also be used for mechanism overload protection. Background technique: [0002] Mechanical devices generally use a clutch as a starting device. Jaw clutches and friction disc clutches only have two states of on and off, so they are prone to mechanical shocks when starting, which has a great impact on the life of the mechanical device. At the same time, they need to be adjusted and replaced frequently during use. U.S. Patent US005896965, Magnetorheological fluid fan clutch (magnetorheological sector clutch), announced a magnetorheological single disc clutch, which introduces a new type of intelligent material magnetorheological fluid as a power transmission medium, through the magnetic field generated by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D35/00
Inventor 曹兴进郑军
Owner CHONGQING UNIV
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