摘要
针对起重机回转传动系统快速启动时冲击载荷容易导致设备损坏的问题,提出了一种基于磁流变技术的冲击载荷控制方法,即通过改变回转传动系统的传递刚度和阻尼特性,实现对快速启动时冲击载荷峰值和脉宽的控制.根据起重机回转传动系统启动工况的特点,建立含齿侧间隙、齿轮啮合刚度与磁流变非线性刚度和阻尼的系统动力学方程,考察了启动工况下影响回转传动系统动态特性的磁流变联轴器刚度、阻尼等关键参数,预测了电流磁致效应对启动冲击载荷峰值的抑制效果.结果表明:采用磁流变联轴器的回转传动系统具有强大的动力传递能力,并可方便有效地调整启动冲击载荷特性,显著地抑制冲击载荷峰值.
Regarding to the vulnerability of the transmission system of rotary crane to impact loads induced by sudden start,a magnetorheological based method for controlling the shock loads of the slewing system was proposed,and the peak value and pulse width of impact impulse could be controlled easily by adjusting the stiffness and damping properties.Dynamics equations considering the backlash,time varying meshing stiffness and nonlinear stiffness and damping coefficient of magnetorheological elastomer were established according to the work characteristics of the slewing transmission system.Investigations on the key parameters influencing the system dynamic properties,including the magnetorheological elastomer based clutch stiffness and damping,and the effects on the shock load controlling were analyzed.The results show that the magnetorheological elastomer based coupling has strong power transmission capability,can adjust the shock load characteristics conveniently and effectively,and reduce the peak of impact load significantly.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第2期16-20,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51275369)
关键词
起重机
回转传动系统
冲击载荷
磁流变联轴器
冲击抑制
crane
slewing transmission system
shock load
magnetorheological coupling
shock resistance
