一器多行环槽推送式排种器的优化设计及研究

Design and Research of Multi-line Metering Device with Ring Groove Push Movement

设计了一种适用于水稻穴直播的一器多行环槽推送式排种器,分析了排种器的工作原理和种子在出种口的受力及运动情况,对排种器的清种和护种结构进行了合理的设计,并对精播条件进行了理论计算,推算出排种盘的理论最大转速。在结合农艺对播种穴距要求的基础上,设计了穴距可调机构,改变不同齿轮啮合得到不同传动比,进而实现播种的穴距可在一定范围内可调节,并通过pro/E对穴距可调结构进行了运动学仿真分析。结果表明:穴距可调机构传动比符合理论传动比要求,穴距可调范围合理,排种器工作可靠。

A multi- line metering device was designed for hill- drop of rice with ring groove push movement. Working principle of the multi- line metering device and force on dropping seed were analyzed,improvement design of structure for cleaning and protecting seeds were made,and the theoretical maximum speed of the metering plate was investigated by theoretical calculation of precision sowing condition. On the base of agronomic requirement for hole distance,a hole space adjustable mechanism was designed. It 's change gears engagement to obtain different transmission ratio and realized the sowing distance adjustable under the certain range. Kinematics simulation analysis for the hole space adjustable mechanism was made on the base of Pro/E,the results showed that the transmission ratio can meet the theoretical request,the adjustable range of hole distance is rational and device working stable and performance well.