摘要
为解决播种单体仿形机构性能难以检测的问题,设计了俯仰式播种单体仿形性能检测试验台。阐述了试验台组成结构与工作原理,对其高速传动系统、液压升降系统、监控系统以及关键部件参数进行设计。应用ANSYS软件对台架整体和关键部件进行静力学分析和模态分析,验证结构设计的合理性。为检验俯仰式播种单体仿形性能检测试验台的实际检测效果,以德邦大为1205型牵引式免耕精量播种机播种单体为研究对象,先以液压杆伸出量与传送带速度为试验因素,以监控系统误差为评价指标进行试验。试验得出,在液压杆伸出量为0~200 mm范围内,监控系统角度传感器最大误差为0.69 mm;在传送带速度8~19 km/范围内,光电编码器最大误差为0.18 km/h。确认监控系统准确性后,再以单体速度为试验因素,采集速度8、10、12 km/h下地块的起伏数据为目标曲线,以地形起伏模拟曲线的绝对误差平均值为指标进行单因素试验,试验得出,所设计的试验台可有效模拟田间地面的起伏频率与起伏量,绝对误差平均值为1.86 mm,满足播种单体仿形性能检测需求。
In order to solve the problem that it is difficult to test the performance of seeding unit profiling mechanism,a pitching seeding unit profiling performance testing bench was designed.The composition and working principle of the test bench were described,and the high-speed transmission system,hydraulic lifting system,monitoring system and key components were designed.ANSYS Workbench was applied to carry out static analysis and modal analysis on the whole test stand and key components to verify the reasonableness of the structural design.In order to test the actual testing effect of the pitching seeding unit profiling performance testing bench,taking the seeding unit of Debont 1205 tractor-type no-till precision planter as the research object,the first test was carried out with the hydraulic rod extension and conveyor belt speed as the test factors,and with the error of the monitoring system as the evaluation indexes.After confirming the accuracy of the monitoring system,the maximum error of angle sensor of the monitoring system was 0.69 mm within the range of hydraulic rod extension of 0~200 mm,a nd the maximum error of the photoelectric encoder was 0.18 km/h within the range of conveyor belt speed of 8~19 km/h.After confirming the accuracy of the monitoring system,taking the speed of the monocoque as the test factor,the data of the land’s undulation curve was collected at speeds of 8 km/h,10 km/h and 12 km/h for the objective of the test curve,the absolute error average of the terrain undulation simulation curve as an indicator of the single-factor test,the test concluded that the designed test bench can effectively simulate the field ground undulation frequency and the amount of undulation,the absolute error average value was 1.86 mm,which can meet the needs of seeding monomer profiling performance testing.
作者
衣淑娟
李怡凯
陈继国
王淞
赵斌
YI Shujuan;LI Yikai;CHEN Jiguo;WANG Song;ZHAO Bin(College of Engineering,Heilongjiang Bayi Agricultural University,Daqing 163319,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2024年第2期90-100,共11页
Transactions of the Chinese Society for Agricultural Machinery
基金
黑龙江省重点研发计划重大项目(2022ZX05B02-02)
黑龙江省“百千万”工程科技重大专项支撑行动计划项目(2020ZX17B01-3)。
关键词
高速播种机
仿形机构
试验台架
农田地形
液压系统
high speed seeder
profiling mechanism
test bench
farmland topography
hydraulic system
