联合收获机割台振动问题研究

Study on the Header Vibration of a Combine

通过对联合收获机割台的动力学分析 ,证明了割台传动系统不平衡的惯性力是引起割台振动的主振源。通过建立力学模型 ,进行了动力学仿真研究 ,确定合理的配重质量和位置。运用在危险位置粘贴应变片和加速度计的试验方法 ,测定了危险位置在各种配重情况下的减振效果。结果表明 ,采用合理的配重可使振动减少 4 0 %以上。

According to dynamic analysis of the header, the major source of the vibration is unbalanced inertial forces in the driving system of cutterbar knife. A mechanical model was established and the dynamic simulation was done based on the model, by which the optimal locations and masses of counterweights were calculated. By attaching accelerometers and strain gages at the critical locations, the benefit of adding a counterweight was experimentally studied .The results showed that the header vibration could be reduced by above 40%.