Exploring Transmission Performance of Multi-disc Magnetorheological Fluid by Electromagnetic Extrusion
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摘要: 针对高转矩磁流变液装置结构复杂及使用场景受限等问题，提出了一种电磁挤压的多盘式磁流变液传动方法，利用励磁线圈通电后产生的电磁力对磁流变液进行挤压，使其在传递高转矩的同时，装置的结构更加简单紧凑。利用Maxwell和Abaqus对装置进行了磁场及结构场有限元分析，计算得到了不同输入电流下磁流变液的剪切屈服应力、电磁力以及各工作间隙内磁流变液所受挤压应力；分析了磁流变液在受到挤压强化后的剪切屈服应力，并计算得出装置所能传递的转矩。对比实验表明：利用电磁挤压，磁流变液的传动性能显著增强，在3 A输入电流、7 241.4 N电磁力时，相较于未挤压状态，装置传递转矩提升了约78.6%。Abstract: In order to solve the problems of complex structure and limited use scene of high-torque magnetorheological fluid (MRF) device, this paper proposes a method of multi-disc MRF transmission through electromagnetic extrusion. The method uses the electromagnetic force generated after the excitation coil is electrified to squeeze the MRF, so that the structure of the MRF device is simpler and more compact while transmitting high torque. The Maxwell software and ABAQUS software were used to analyze the magnetic field and structural field of the MRF device. Shear yield stress, electromagnetic force and extrusion stress of MRF in each working gap under different input current were calculated; shear yield stress of MRF after extrusion was analyzed, and the torque transmitted by the MRF device was calculated. The comparison of experimental results shows that the transmission performance of the MRF device is significantly enhanced with electromagnetic extrusion. When 3 A input current and 7 241.4 N electromagnetic force are applied, the transmission torque of the MRF device increases by 78.6% compared with the non-extrusion state.
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Key words:
- magnetorheological fluid /
- electromagnetic extrusion /
- multi-disk /
- high torque
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表 1 MRF离合器结构参数
参数 数值 参数 数值 磁路段数 5 L1/mm 90 R 1/mm 55 L2/mm 22 R2/mm 115 L3/mm 18 R3/mm 145 L4/mm 1 R4/mm 8 L5/mm 6 
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