| 射流式水田株间除草装置设计与试验 |
| |
| 引用本文： | 王金武,闫东伟,王奇,唐汉,王金峰,周文琪.射流式水田株间除草装置设计与试验[J].农业机械学报,2021,52(11):78-85，94. |
| |
| 作者姓名： | 王金武 闫东伟 王奇 唐汉 王金峰 周文琪 |
| |
| 作者单位： | 东北农业大学 |
| |
| 基金项目： | 国家自然科学基金项目（51875098）、国家现代农业产业技术体系岗位科学家项目(CARS-01-44)和黑龙江省现代农业产业技术协同创新体系岗位专家项目 |
| |
| 摘 要： | 针对水田株间除草作业劳动强度大、株间除草率低、易损伤秧苗等问题，提出一种水射流除草方法，以此设计了一种射流式株间除草装置。首先通过理论分析与参数计算确定了射流倾角为31°，喷嘴直径为0.004mm，运用动量守恒定理、粘性流体力学和土力学原理进行分析，建立了喷嘴临界破土压力模型，得出喷嘴临界破土压力为0.53MPa。进行水稻根系抗冲断极限水压试验，确定了喷嘴出口压力上限为1.5MPa。进行台架试验，选取装置前进速度和喷嘴出口压力为试验因素，以除草率为试验指标，采用二次正交旋转组合设计，建立了试验指标与影响因素回归模型。运用Design-Expert 8.0.6软件对试验数据分析并进行验证试验，结果表明，当装置前进速度为0.3m/s，压力为1.5MPa时，除草率为90.62%。满足水田机械除草作业农艺和技术要求。
|
| 关 键 词： | 稻田 杂草 株间除草 射流式 |
| 收稿时间： | 2021/7/21 0:00:00 |
Design and Experiment of Jet-type Paddy Field Weeding Device between Plants |
| |
| WANG Jinwu,YAN Dongwei,WANG Qi,TANG Han,WANG Jinfeng,ZHOU Wenqi.Design and Experiment of Jet-type Paddy Field Weeding Device between Plants[J].Transactions of the Chinese Society of Agricultural Machinery,2021,52(11):78-85，94. |
| |
| Authors: | WANG Jinwu YAN Dongwei WANG Qi TANG Han WANG Jinfeng ZHOU Wenqi |
| |
| Institution: | Northeast Agricultural University |
| |
| Abstract: | Aiming at the problems of high labor intensity of weeding operations, the low weeding rate inter-plants and the seedling damage in transplanting rice field, a new method of weeding by water jet between plants in complex paddy filed environment was proposed. Based on the water jet weeding method and the mechanical structure design, a jet type inter-plant weeding device was designed. Firstly, by analyzing the structural characteristics of rice seedings, weed roots and submerged water jet, the injector angle was determined to be 31°and the diameter parameters of the injector was determined to be 0.004mm through theoretical analysis and parameter calculation. Combined with the momentum conservation theorem, the viscous fluid mechanics, and the soil mechanics analysis, the critical failure condition model of soil was established, and the critical pressure of earth breaking of the injector was obtained to be 0.53MPa. The extreme water pressure test of rice root system anti-breaking was carried out, and the maximum pressure limit of injector outlet was determined to be 1.5MPa. Besides, the bench test was carried out, the forward speed of the device and the pressure of the injector outlet were selected as the test factors, the weeding rate was used as the test index. Both the test index and the influencing factor regression model were established by using the method of secondary orthogonal rotation combination design. The Design-Expert 8.0.6 software was used to analyze and verify the test data, the results showed that when the forward speed of the device was 0.3m/s and the pressure was 1.5MPa, the weeding rate was 90.62%. The device can meet the agronomic and technical requirements of paddy field mechanical weeding operations. |
| |
| Keywords: | paddy field weed weeding between plants jet-type |
|
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
|
