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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.
Aiming at the problem that the impact load easily lead to equipment damage when the crane slewing drive system starts up rapidly, a method of controlling the impact load based on magnetorheological technology is proposed. By changing the transmission stiffness and damping characteristics of the slewing drive system, According to the characteristics of the starting condition of the crane slewing drive system, the system dynamic equations including the tooth-side clearance, the meshing stiffness of the gear and the nonlinear stiffness and damping of the magnetorheological fluid are established, and the effects of starting conditions The key parameters such as the stiffness and damping of the magnetorheological coupling which affect the dynamic characteristics of the slewing drive system are predicted and the effect of magnetoacoustic effect on the peak value of starting impact load is predicted.The results show that the slewing drive system with magneto-rheological coupling has Strong power transmission capacity, and can easily and effectively adjust the starting impact load characteristics, significantly inhibit the peak impact load.