Influence of Temperature on Torque Transmission Stability of Magnetorheological Fluid
Influence of Temperature on Torque Transmission Stability of Magnetorheological Fluid
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DOI：
10.4283/jmag.2018.23.4.529
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发表时间：
2018-12-01
影响因子：
0.5
通讯作者：
Hao, Li
中科院分区：
文献类型：
--
作者：
Tian, Zuzhi;Wu, Xiangfan;Hao, Li
为了获得温度对磁流变液转矩传递稳定性的影响机理，首先建立了磁流变传动装置及其试验台，然后对其热膨胀、温度压力效应、热挥发、粘度温度特性、磁性温度特性等相关温度特性进行了系统实验。结果表明：30 wt%磁流变液在120℃和220℃时的热膨胀率分别为6%和18%，当温度从32℃升高到63℃时，工作空间压力为13 kPa，在200℃下保温8 h时，热挥发率仍低于1%。当温度从20℃升高到240℃时，硅油基磁流变液的粘度降低了78%，饱和磁化强度在150℃、250℃和350℃时分别降低了6.2%、13%和23%，温度场分布实验表明，最高温区位于圆盘外径处，且沿径向缓慢膨胀。与转速相比，温度是影响磁流变液转矩波动的主要因素。
Aiming to obtain the influence mechanism of temperature on the torque transmission stability of magnetorheological fluid, firstly, a magnetorheological transmission device and its test-bed are established, and then, the thermal expansion, temperature pressure effect, heat volatilization, viscosity temperature characteristic, magnetic temperature characteristic and other related temperature characteristics were experimented systematically. The results indicate that the thermal expansion rate of 30 wt% magnetorheological fluid is 6 % and 18 % respectively at 120 degrees C and 220 degrees C, and the working space pressure is 13 kPa when the temperature rises from 32 degrees C to 63 degrees C. The thermal volatilization rate is still lower than 1 % at 200 degrees C for 8 hours. The viscosity of the silicone oil based magnetorheological fluid decreases by 78 % when the temperature increases from 20 degrees C to 240 degrees C, and the saturation magnetization decreased by 6.2 %, 13 % and 23 % respectively at 150 degrees C, 250 degrees C and 350 degrees C. Furthermore, the temperature field distribution experiment shows that the highest temperature region is at the outer diameter of the disk and expands slowly along the radial direction. Moreover, compared with rotational speed, temperature is the main factor affecting the torque fluctuation of magnetorheological fluid.