传动装置中磁流变液的稳态流动分析  

Flow analysis of magnetorheological fluid in transmission device in steady state

作　　者：郑军[1] 张光辉[1] 曹兴进[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《中南大学学报（自然科学版）》2008年第1期149-154,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(59905024);重庆大学研究创新实验项目(2005年)

摘　　要：为了了解磁流变液在传动装置中的流动,基于Bingham模型和流体动量方程,分析稳态下传动装置中磁流变液的流动特性。研究结果表明,在同步工况下,传动装置流场中磁流变液未屈服,各点角速度相同;在滑差工况下,随外加磁场的增大和滑差转速的减小,磁流变液逐渐从完全屈服向部分屈服转变;磁流变液完全屈服时,磁流变液角速度随半径呈非线性增加,工作间隙中磁场越强,流场的非线性分布越明显;磁流变液部分屈服时屈服区域随外加磁场的增大而减小,随滑差转速的增大而增大,未屈服区与主动转子相连;稳态下磁流变传动装置传递的转矩随外加磁场的增加而近似呈线性增大,但在相同外加磁场下,传递转矩基本不随滑差转速改变而改变,表现出良好的恒转矩特性。To obtain the flow characteristics of magnetorheological fluid （MRF） in MR transmission device （MRTD）, the flow field of MRF in the MRTD under steady state was analyzed based on the Bingham model and liquid momentum equation. The results indicate that in the synchronizing condition the MRF is unyielded, every point of MRF in the flow field has the same angular velocity. Under the slipping condition, with the increase of magnetic field or the decrease of slip speed, MRF may transfer from whole yield to partial yield. When the MRF wholly yields, the angular velocity of MRF increases nonlinearly with its radius, the non-linear distribution becomes more obvious as the magnetic intensity in the working gap increases. When the MRF partially yields, the yield region expands with the decrease of magnetic intensity or the increase of slip speed and the unyield region always reaches the driven rotor. The transfer torque of MRTD increases with the increase of the external magnetic field, but the transfer torque maintains a constant value approximately with the variation of slip speed at the same magnetic intensity.

关 键 词：磁流变液 传动装置 Bingham模型 流场 

分 类 号：TH132[机械工程—机械制造及自动化]