Abstract: To meet the requirements of machinepicked cotton planting, a double U type cotton precision seeder was designed, which can complete ditching, fertilizing, spraying, laying drip irrigation belt, profiling, film laying, sowing, pressing, and other operations at one time. The machine adopts a spoon wheel duckbill type precision metering device and soil lifting and covering device to realize watersaving and precise fullfilm sowing. Using ANSYS software, the statics analysis of cavitations mechanism of double U type precision cotton seeder and the modal analysis of the drive shaft of the soil lifting and the covering device were carried out. The results of the field test showed that the hole rate of seeds was 1.6%, the mechanical damage rate was 0.1%, the qualified rate of hole number was 96.2%, the qualified rate of seed cover depth was 97.5%, and the degree of mechanical damage of daylighting surface was 16.8 mm/m2. The pass rate of daylighting surface width was 93.6%, and the test indicators had reached the relevant design requirements and agricultural standards.

Key words: cotton precision seeder, seed metering device, soil lifting and covering device, static analysis, modal analysis

摘要： 针对机采棉种植农艺要求,设计一种一次性可完成开沟、施肥、喷药、铺设滴灌带、仿形、铺膜、播种、镇压等作业的双U型棉花精量播种机。该机采用勺轮鸭嘴式精量排种器和提土覆土装置实现节水精量全膜播种;利用ANSYS软件对双U型棉花精量播种机的成穴机构进行静力学分析,对提土覆土装置的传动轴进行模态分析。田间试验表明:种子的空穴率为1.6%,种子机械破损率为0.1%,穴粒数合格率为96.2%,种子覆土厚度深度合格率为97.5%,采光面机械破损程度为16.8 mm/m~2,采光面宽度合格率为93.6%,试验指标均达到设计的相关要求和农业的相关标准。

关键词: 棉花精量播种机, 排种器, 提土覆土装置, 静力学分析, 模态分析