2BFQ-6型油菜精量联合直播机变量播种机构的设计

Design of mechanism for variable sowing on 2BFQ-6 rape precision combined direct planter

针对不同种植条件和播期所对应的直播油菜播种密度的不同要求,根据切换齿轮啮合关系可改变排种器输入轴转速的工作原理,设计了一种适用于2BFQ-6型油菜精量联合直播机的变量播种机构;介绍了具有4级播种密度调节功能的变量播种机构结构特征和工作原理;分析确定了该机构的主要结构参数和性能参数,同时运用有限元开展的模态分析显示输出齿轮轴刚性足够。台架试验表明,在相同时间内和同等条件下,未安装变量播种机构时排种量与安装变量播种机构时排种量之间的误差率低于7%,该变量播种机构能满足油菜变量播种的要求。

Based on different planting conditions and sowing time in the same place and according to different requirements of rape seeding density,the mechanism for variable sowing on 2BFQ-6 rape precision combined direct planter has been designed,depending on the theory that adjusting the engaging relations of gears can change the input shaft＇s speed of the metering device.Its structure and working principle were studied in this paper,and it has the regulatory function with four planting densities.At the same time some main structural and performance parameters were analyzed and presented.Modal analysis showed that the rigidity of the output gear shaft is sufficient.The bench tests approved that the error ratio between the sowing amount of the metering device when the mechanism for variable sowing is not installed and the one when it is installed is less than 7% within the same time and under the same condition.It can satisfy the requirements of rape＇s variable sowing.