多筒式磁流变液离合器的设计及仿真

摘要

为满足 B 级轿车大转矩传递的要求，并克服高速旋转工况下离心力对磁流变液（Magneto-Rheological Fluid， MRF）的影响，提出了多筒式磁流变液离合器（Magneto-rheological Fluid Clutch，MFC）结构型式，设计了可以自动消除因工作温度变化导致磁流变液膨胀或收缩的压力平衡机构；同时，在 Ansoft Maxwell 中建立了离合器有限元分析模型，并对磁力线分布和磁场强度进行了仿真分析。结果表明：当励磁电流在2．5～3 A 之间时即可达到设计要求。%To meet the requirement of transmitting a large torque of B-class automobile and overcome the effects of centrifugal force under high speed rotating conditions on Magneto-Rheological Fluid (MRF),a multi-cylindrical Magneto-rheological Fluid Clutch (MFC)is proposed.A pressure balance mechanism is designed to avoid the expansion or contraction of MRF caused by the temperature changes.A finite ele-ment analysis model is built in Ansoft Maxwell,and the magnetic force line distribution and magnetic field intensity are simulated.The simulation result shows that the design goal can be realized when the excitation current is between 2.5 A and 3 A.