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Analysis of a magneto-rheological coupler with misalignment

机译：磁流变耦合器未对准的分析

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摘要

In most modeling analyses of drum type magneto-rheological (MR) fluid coupling devices, the centerlines of the drums are often assumed to be coincident; however, misalignments often exist in many practical applications, which change the characteristics of the MR fluid devices. This paper focuses on the characteristics of a rotary drum type MR coupler with a misalignment. In this paper, we discuss the operational modes of MR fluids and derive equations to describe the behavior of MR fluids in MR couplers with misalignment by using the Navier-Stokes equation. Based on the results of numerical computation, we found that the misalignment due to different tolerance grades has a limited effect on the pressure in the drums, the shear stress of the MR fluid, and the torque of an MR coupler. However, when the eccentricity ratio increases to 23.3% or the tolerance grade of the two drums is 10 (ISO standard), the effect, especially the effect on the pressure, increases greatly, and should be considered during the design of seals for MR couplers. In addition, the pressure and the shear forces will apply forces on the drums along the vertical and horizontal directions, and change periodically as the drums rotate, which should be considered when designing them.
机译：在大多数鼓式磁流变（MR）流体耦合装置的建模分析中，通常假定鼓的中心线是重合的。但是，在许多实际应用中经常会出现未对准的情况，这会改变MR流体设备的特性。本文重点介绍了未对准的旋转鼓式MR耦合器的特性。在本文中，我们讨论了MR流体的工作模式，并通过使用Navier-Stokes方程推导了描述不对准的MR耦合器中MR流体行为的方程。基于数值计算的结果，我们发现由于不同的公差等级而导致的未对准对鼓中的压力，MR流体的剪切应力以及MR耦合器的扭矩具有有限的影响。但是，当偏心率增加到23.3％或两个鼓的公差等级为10（ISO标准）时，这种影响，特别是对压力的影响会大大增加，在设计MR联轴器密封件时应考虑。另外，压力和剪切力将沿垂直和水平方向在滚筒上施加力，并且随着滚筒的旋转而周期性地变化，这在设计滚筒时应予以考虑。

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