王金武,白海超,孙小博,王金龙,唐汉,周文琪.水田喷雾机喷雾装置设计与动态分析[J].农业机械学报,2019,50(3):69-79.
WANG Jinwu,BAI Haichao,SUN Xiaobo,WANG Jinlong,TANG Han,ZHOU Wenqi.Design and Dynamic Analysis of Spray Device for Paddy Field Sprayer[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(3):69-79.
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水田喷雾机喷雾装置设计与动态分析   [下载全文]
Design and Dynamic Analysis of Spray Device for Paddy Field Sprayer   [Download Pdf][in English]
投稿时间:2018-09-05  
DOI:10.6041/j.issn.1000-1298.2019.03.007
中文关键词:  水田  喷雾机  多折叠机构  模态分析
基金项目:国家现代农业产业技术体系岗位科学家项目(CARS-01-44)和黑龙江省现代产业技术协同创新体系岗位专家项目
作者单位
王金武 东北农业大学 
白海超 东北农业大学 
孙小博 东北农业大学 
王金龙 东北农业大学 
唐汉 东北农业大学 
周文琪 东北农业大学 
中文摘要:针对传统机械式喷杆折叠展开过程复杂、同步协调操作性差、机械振动明显等问题,结合东北地区水田植保农艺特点,设计了一种单油缸多折叠机构喷杆。阐述分析了多折叠机构喷杆的结构及工作原理,依据解析法对其各部分杆长进行确定。通过正交试验设计和虚拟仿真技术进行多因素正交试验,探究了不同壁厚下各类型钢管对喷杆质量和第1阶固有频率的影响,应用Design Expert 8.0.6软件对试验结果进行分析优化。优化结果表明,当圆钢管壁厚、矩形钢管壁厚和方钢管壁厚分别为2、2、2mm时,质量最小,为62.85kg,此时动态特性较好,其第1阶固有频率为14.84Hz,避开了路面激励频率。运用ANSYS-workbench软件建立了喷杆的有限元模型并进行了数值模态分析,求解了喷杆的前4阶非零模态频率和振型,并通过模态试验验证了数值模型优化结果的准确性。田间试验表明,该机具作业性能稳定,药液喷施均匀,覆盖性较好,作业过程中喷杆无明显振动,各项指标满足水田植保农艺要求。
WANG Jinwu  BAI Haichao  SUN Xiaobo  WANG Jinlong  TANG Han  ZHOU Wenqi
Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University,Northeast Agricultural University and Northeast Agricultural University
Key Words:paddy field  sprayer  multiple folding mechanism  modal analysis
Abstract:Aiming at the problems of complicated folding and unfolding process, poor synchronous coordination and the obvious mechanical vibration of traditional mechanical spray rod, a spraying rod consisted of single cylinder multiple folding mechanism was designed combined with the agronomic characteristics of paddy field plant protection in Northeast China. The structure and working principle of the spraying rod with multiple folding mechanism were expounded and analyzed. The length of each part was determined according to analytic method. Through orthogonal experiment and virtual simulation technology, the effects of various types of steel pipes with different wall thicknesses on spray rod quality and first order natural frequency were investigated, and the results were analyzed and optimized by Design Expert 8.0.6 software. The optimization results showed that when the wall thickness of round steel pipe, rectangular steel pipe and square steel pipe was 2mm, 2mm and 2mm respectively, the mass was 62.85kg, which was the lightest and the dynamic characteristic was good at this point. Its first order natural frequency was 14.84Hz, which avoided the 13.03Hz of the pavement incentive frequency. The finite element model of the sprayer was established by ANSYS-workbench software and the numerical modal analysis was carried out. The first four order non zero modal frequency and vibration mode of the sprayer were solved, and the accuracy of the numerical model optimization results was verified by modal test. Field experiments showed a stable performance of the machine, uniform spraying of liquid pesticide solution, good coverage, and no obvious vibration of spraying lever during operation.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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