曲柄滑块式清选筛机构惯性力平衡研究

利用解析法对曲柄滑块式清选筛机构进行运动学及动力学分析,得到构件的惯性力和机构的总惯性力,通过质量代换法对该机构进行平衡建模,计算出机构部分平衡时曲柄上添加的平衡质量,并进行平衡质量的优化分析。在履带式谷物联合收割机上进行曲柄滑块式清选筛机构的振动试验,获取机架上不同点及驾驶室内的振动信号,采用时域平均法对振动数据进行处理,以验证理论分析正确性。理论分析及试验研究表明:曲柄滑块式清选筛进行部分平衡时,安装在曲柄链轮上的平衡块在矢径r1=9 5 mm、质量为2 kg时机器振动达到最小。

Investigation on Inertial Force Balancing of Slider-crank Type Cleaning Sieve

Kinematics and dynamics analysis of the mechanism by analytical method in this paper , obtained the total in-ertia force of each part and the whole mechanism , analyzed by quality substitution method to built balance model , calcu-lated the part balance quality of the crank and further to optimized .Designed vibration test for the union harvester which has the slider-crank type cleaning sieve , got vibration signal from the point in frame and the cab , vibration signals were processed by time domain average method which proved the correctness of theory analysis .Theoretical analysis and experimental study show that the slider-crank type cleaning sieve part balance quality which installed in the sprocket -crank equal to 2kg, radius vector was 95mm, at this time ,the mechanism has the minimum vibration and achieved the best state .