水稻种绳直播机的设计

Development of the Taped Type Rice Direct Seeding Machine

为了实现水稻种绳直播种植技术机械化,利用UG软件采用虚拟设计方法研制了水稻种绳直播机。该机主要由开沟器、防堵器、镇压轮、覆土器和种绳盘安装机构等部分组成。田间试验结果表明,样机具有机动灵活、作业效率高、结构简单等特点。为了探索机器覆土厚度的稳定性,进行了系统动态模拟试验。应用等同法建立了以原始地表不平度为输入,以覆土厚度为输出的系统传递函数,分析了系统的动态特性,结果表明:由种绳直播机和土壤等构成的"土壤—机器"系统是一个具有一阶惯性特征的线性系统,系统的响应速度、频带宽度和覆土厚度等性能指标能够满足农业技术要求。

In order to realize the mechanization of rice direct sowing with seed rope, a taped type rice direct seeding machine was developed with the method of virtual designed and the software of UGNX. The machine consists of furrow openers, antiblocking devices,press wheels, covering devices and shafts of taped seed rolls. Field test results showed that the machine has the advantage of good maneuverability, high working efficiency and simple structure. Transfer function, which using original field surface roughness formed by the working of rotavator as the input and rolled field surface roughness formed by the roller of the seeding machine as the output, were modeled by the method of identification and the dynamic characteristics of the systems were analyzed. The results showed that the ＂soil-machine＂ system was linear with the typical feature of first order. The dynamic characteristics of the systems such as rapidity, bandwidth and soil covering thickness were able to satisfy the requirements of rice seeding technique.