深施型液态施肥机扎穴机构动力学优化

Dynamics optimization for pricking hole mechanism of deep-fertilization liquid fertilizer applicator

为保证液态施肥机在高速作业下仍具有良好的可靠性,以液态施肥机扎穴机构为研究对象,将太阳轮x、y方向峰值力和波动力作为目标函数,运动学优化结果作为目标函数的约束条件,应用Visual Basic6.0软件开发出基于"种间竞争"改进遗传算法动力学优化软件。软件得到优化参数为:喷肥针尖和行星轮轴连线与行星架的初始夹角-42o、行星架初始角位移45o、喷肥针尖与行星轮轴心距离285mm。根据动力学优化结果,应用Pro/E和ADAMS对扎穴机构进行设计与仿真验证。结果表明,根据优化参数设计的扎穴机构既能满足工作要求,又具有较好的力学特性。

In order to assure good reliability for liquid fertilizer applicator in high working speed,the pricking hole mechanism of liquid fertilizer applicator was taken as research object,and the maximum force and undulation force of x and y directions of sun gear were taken as objective function. Optimization results of kinematics was used as constraint conditions of objective function,and the dynamics optimization software was developed based on the improved ＂interspecies competition＂ genetic algorithm by using Visual Basic 6.0 software. Optimized parameters were obtained by this software,where the initial angle between the line connecting spraying-fertilizer needle-tip or planet wheel axle and planet frame is -42o,and the initial angular of planet frame is 45o,and the distance between spraying-fertilizer needle-tip and the planetary gear axle center is 285 mm. According to the dynamic optimization results,the pricking hole mechanism of liquid fertilizer applicator was designed and simulated by using Pro/E and ADAMS. The simulation results showed that the pricking hole mechanism with the optimized parameters can satisfy the operation requirements and has good mechanical properties.