下运带式输送机用磁流变液制动系统设计

Design of Magnetorheological Fluid Braking System Used in Downward Belt Conveyor

磁流变液制动器可以较好地弥补现役下运带式输送机制动系统存在热衰退、摩擦磨损等诸多缺点,但制动力矩与散热问题限制了其大型化应用。在双线圈旁置式磁流变液制动器基础上,通过增加散热槽和接触工作面积,并改变励磁线圈布置形式,设计了一种新型多槽磁流变液制动系统,以达到提升其制动性能的目的。结果表明:同等空间尺寸条件下,制动力矩提高了72.3%;相同制动工况下,最大瞬态温度降低了24.82%。

Magnetorheological fluid brake can make good up for the shortcomings in the braking system of downward belt conveyors, such as the phenomena of heat -fade, friction and wear, but the braking torque and the heat dissipation are always the key factors restricting the large-scale application. On the basis of previous work on the magnetorheological brake with double coils placed on the side housing, a new type of magnetorheological brake with multi -grooves was designed by increasing the heat dissipation grooves and the contact working areas and changing the layout of magnetic exciting coil, in order to improve its braking performance. Results revealed that the braking torque is increased by 72.3% under the same space -size condition;and the maximum transient temperature is reduced by 24.82% under the same braking condition.