电流变流体在调速风扇离合器中应用的试验分析

目的通过对中型卡车用调速风扇离合器进行改进设计，对电流变流体在调速离合器中的应用进行了试验研究．方法在三种输入转速下，当外加电场强度不同时，对风扇离合器的调速特性进行了分析．结果通过对不同的试验过程所得到的结果及与电流变流体在电流变仪中的测量结果的对比，证明了剪切率的作用对风扇离合器的调速性能有重要影响．这是由于在高剪切率下，分散相难于成为链（束）结构所致．成链（束）时间远远大于分散相的极化时间．结论所用电流变性，即流体的表观粘度成为常数．

Analysis of the Test of ER Fan Clutch

Aim To carry out an experiment of the application of ER fluids in the clutch by reforming a fan clutch used in a truck. Methods At three different input rotating speeds,when the strength of applied electric field was changed, the output rotating speeds were recorded and analyzed. Results By comparing the results got under different experimental procedures with those measured with an electro-rheometer, it can be seen that the shearing rate has tremendous influence on the speed modulating of a fan clutch. This is because the disperse phase can't form chains (clusters)easily at high shear rate.Conclusion The result tested on the present ER fluid demonstrates that this fluid will show the properties of Newton one,i.e. its apparent viscosity is constant. as the shear rate increases.