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Prototype and test of a novel rotary magnetorheological damper based on helical flow

机译：基于螺旋流的新型旋转磁流变阻尼器的原型设计与测试

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摘要

To increase the output damping torque of a rotary magnetorheological (MR) damper with limited geometrical space, a novel rotary MR damper based on helical flow is proposed. A new working mode, helical flow mode, is discussed and applied to enlarge the flow path of MR fluids. The helical flow can improve the performance of the rotary damper by enlarging the length of the active region. Based on the idea, a rotary MR damper is designed. The rotary MR damper contains a spiral piston, dual-coil. core, a rotating cylinder and a stator cylinder. Based on the Bingham model, the output damping torque of the damper is analytically derived. The finite element method (FEM) is applied to calculate the magnetic field of the active region. The multi-objective optimal design method is adopted to obtain the optimal geometric parameters. A prototype is fabricated based on the optimal results. To validate the proposed rotary MR damper, two types of experiments including the low rotation speed and the high rotation speed are investigated. The results show that the proposed rotary MR damper has high torque density and compact structure. The helical flow mode can increase the output damping torque with limited space.
机译：为了增加几何空间有限的旋转磁流变（MR）阻尼器的输出阻尼扭矩，提出了一种新型的基于螺旋流的旋转磁流变阻尼器。讨论了一种新的工作模式，即螺旋流模式，并将其应用于扩大MR流体的流路。螺旋流可以通过增加有效区域的长度来改善旋转阻尼器的性能。基于该思想，设计了旋转MR阻尼器。旋转MR阻尼器包含一个螺旋活塞，双线圈。铁心，旋转缸和定子缸。基于宾厄姆模型，可以得出阻尼器的输出阻尼扭矩。应用有限元方法（FEM）计算有源区域的磁场。采用多目标最优设计方法获得最优几何参数。基于最佳结果制造了原型。为了验证所提出的旋转MR阻尼器，研究了两种类型的实验，包括低转速和高转速。结果表明，所提出的旋转MR阻尼器具有较高的扭矩密度和紧凑的结构。螺旋流模式可以在有限的空间内增加输出阻尼扭矩。

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