Magneto-rheological fluid and electromagnetic friction combined transmission device driven by shape memory alloy

Abstract

The invention discloses a combined transmission device with magnetorheological fluid driven by shape-memory alloy and electromagnetic friction. The device comprises a driving shaft, a driven shaft anda driven shell. A plurality of oil storage tanks are arranged around the whole circle of each of the two end faces of a driven cylinder. An oil fluid driving device is arranged outside a left end cover of the driven cylinder, and an oil fluid driving device is arranged outside a right end cover of the driven cylinder. An energizing coil is arranged at the position, close to each of the two ends,of the inner side of the driven cylinder. An outer friction ring is arranged on the inner side of each energizing coil. A plurality of containing grooves are formed in a transmission section. A guiderod is fixedly arranged in each containing groove. A guide groove is formed in the outer end of each guide rod. An armature push rod is further arranged in each containing groove. The outer end of each armature push rod is expanded to form a push section. An inner friction ring is fixed to the outer end of each push section. A second shape-memory alloy spring is arranged between each push sectionand the groove bottom of the corresponding containing groove. According to the combined transmission device with magnetorheological fluid driven by shape-memory alloy and electromagnetic friction, theservice life of magnetorheological fluid can be prolonged, the magnetorheological fluid is automatically controlled to carry out torque transmission, and the stability of torque transmission is guaranteed.

Description

technical field [0001] The invention relates to the technical field of transmission devices, in particular to a combined transmission device of magnetorheological fluid and electromagnetic friction driven by a shape memory alloy. Background technique [0002] Due to the good performance of magnetorheological fluid in transmission, such as flexible transmission between the main and driven parts, high sensitivity, high precision, and stable stepless speed regulation, it is easy to realize remote control and automatic control of the speed regulation process, etc. , so in recent years there have been more and more studies on the application of magnetorheological fluids in transmission, but the performance of magnetorheological fluids will decrease with the increase of ambient temperature (the performance will begin to decline when the temperature is higher than 80 ° C), which cannot meet the needs of transmission. The working requirements of the device in different temperature e...

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Problems solved by technology

[0005] 1. The magnetorheological fluid is always located in the working chamber. In this way, the magnetorheological fluid will be driven to flow during the rotation of the drive shaft, and the magnetic particles in the magnetorheological fluid will rub against each other, resulting in a decrease in the performance of the magnetorheological fluid and affecting Magnetorheological fluid life;

[0006] 2. When the temperature rises, the magnetorheological fluid cannot quickly and automatically output torque;

[0007] 3. When the temperature rises and the performance of the magnetorheological fluid decreases, the performance of the entire transmission device will also decrease. The existing transmission device cannot effectively compensate for the decrease in the performance of the magnetorheological fluid, thus affecting the stable output of torque

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