拖拉机前悬架单出杆磁流变减振器研制

针对拖拉机减振性能差的问题,在分析车辆磁流变减振器工作模式基础上,建立了基于流动模式的阻尼力理论计算模型。根据某大功率轮式拖拉机前桥悬架减振器的工作要求,研制了一种单出杆磁流变减振器。试验研究了输入电流和激励速度对减振器阻尼力的影响。试验结果表明:在低速情况下,阻尼力可控倍数达5.9;减振器饱和工作电流约1.8A,最大输出阻尼力约1370N。试验验证了所提设计思路和方法的有效性,并为阻尼可调式半主动空气悬架的控制研究提供了依据。

Development of single outstretch pole magnetorheological damper on tractor front suspension

Aiming to the problem of poor performance of tractor vibration, a flow pattern was developed on the basis of a damping force mathematical model, which was presented with analyzing working pattern of the magnetorheological damper(MRD). According to working requirements of large wheel tractor front axle suspension, a single outstretch pole MRD was designed. Experiments were conducted to assess the impact of input current and the excitation rate on the shock absorber damping force. It is observed that the damping force controllable ratio reaches 5.9 in low speed situation. Whereas, it increases with the applied current to its peak value of 1.8 A and the maximum output damping force reaches at 1 370 N. Perceived results justify the validity of the design, and provide the evidence for controlling semi-active air suspension with adjustable damping.