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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.
- 出版日期2011-10
- 单位武汉科技大学
