【摘要】 针对旋转式磁流变阻尼器的结构特征分析了阻尼力矩的构成模型,并利用楔形工作面设计,在磁流变工作盘间产生均匀变化的非匀强磁场;进一步研究了楔形工作面设计的磁阻变化计算模型及其产生的非匀强磁场对阻尼器工作效率的影响。实验表明,旋转式阻尼器采用楔形工作面设计时,在相同电流作用下所输出力矩可比平行板设计有明显增大,同时不可通过电流控制的零场力矩稍有增大,对于节能降耗、减小励磁线圈发热等问题提供了一个可行措施。更多还原

【Abstract】 Based on the analysis of the damping torque of rotary disc-type magnetorheological fluid(MRF)damper,a new kind of MRF disc-type damper is proposed.The working disc of the new kind of damper has a wedged shape that results in variable working clearances,and hence a nonhomogeneous magnetic field is produced.The magnetic resistance of the MRF filled in the variable clearance is analyzed and the impact of the produced nonhomogeneous magnetic field on the damping torque of the damper is studied.Experiments are conducted and the damper performance under steady shear rate is evaluated with an author-designed test stand.The experimental results show that the output damping torque produced by the MRF of the new kind of damper is much greater than that of the ordinary dampers with parallel disc surfaces and constant working clearance under the same conditions.And the growth rate of uncontrollable torque which are generated by viscous and fraction is slow.The effect is beneficial for energy conservation and heat control.更多还原