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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >EFFECT OF CENTRIFUGAL FORCE ON MAGNETO-RHEOLOGICAL FLUID CLUTCHES
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EFFECT OF CENTRIFUGAL FORCE ON MAGNETO-RHEOLOGICAL FLUID CLUTCHES

机译：离心力对磁流变流体凝结的影响

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The property of magnetorheological fluids to change their yield stress depending on applied magnetic fields can be employed to develop many controllable devices one of them being MR fluid based clutches. One major problem however with MR fluid based clutches is that at high rotational speeds, the iron/ferrous particles in the MR fluid centrifuge due to very high centrifugal forces. Thus the particles move outward as the speed increases thereby making the fluid non-homogeneous. Many times however the initial analysis assumes fluid homogeneity, which is really not the case. In this paper this problem is addressed by assuming various volume fraction profiles describing the fluid particle orientation. Two cases, one with a linear profile and the other with an exponential profile are discussed. Expressions for the torque transmitted are derived at for both disc shaped and cylindrical shaped clutches. In addition, the use of a MR sponge based clutch that may indeed reduce the effect of centrifugal forces significantly is described. The design methodology and configuration for the sponge clutch are also discussed. An experimental set up used to test the clutch is also described.
机译：磁流变流体根据所施加的磁场改变其屈服应力的特性可用于开发许多可控设备，其中之一是基于MR流体的离合器。然而，基于MR流体的离合器的一个主要问题是在高转速下，由于非常高的离心力，MR流体离心机中的铁/铁颗粒。因此，随着速度增加，颗粒向外移动，从而使流体变得不均匀。但是，很多时候，初始分析都假设流体是均匀的，实际上并非如此。在本文中，通过假设描述流体粒子方向的各种体积分数分布图来解决此问题。讨论了两种情况，一种具有线性轮廓，另一种具有指数轮廓。对于盘形和圆柱形离合器，都可以导出传递扭矩的表达式。另外，描述了使用基于MR海绵的离合器，其实际上可以显着降低离心力的影响。还讨论了海绵离合器的设计方法和配置。还介绍了用于测试离合器的实验装置。

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