| 牛国梁,李斌,刘洋,王士国,王涛,孙晓晓.立式棉秆粉碎还田机设计与试验[J].干旱地区农业研究,2022,40(1):255~263 |
| 立式棉秆粉碎还田机设计与试验 |
| Design and test of vertical cotton stalk crushing and returning to the field machine |
| |
| DOI：10.7606/j.issn.1000-7601.2022.01.29 |
| 中文关键词: 棉秆粉碎还田机 流体分析 结构优化 |
| 英文关键词:cotton straw crushing and returning to the field machine fluid analysis parameter optimization |
| 基金项目:国家重点研发计划（2017YFD0701102）；新疆农垦科学院院级科研项目（2020YJ014） |
|
| 摘要点击次数: 730 |
| 全文下载次数: 391 |
| 中文摘要: |
| 针对现有秸秆粉碎还田机工作效率低、留茬较高、与现有农艺不匹配等问题，结合新疆棉花种植模式和秸秆粉碎还田的要求，研制了一种立式棉秆粉碎还田机，主要由机架、切割装置、动力传动装置等组成。为明确该作业机的性能，提高作业质量，利用Fluent进行流体分析，结果表明,所设计的折线形1机架、粉碎刀为三组、粉碎刀与地面之间的夹角为3°时有利于棉秆的粉碎。确定机具前进速度、动力输出轴转速和刀尖离地间隙为试验因素，以秸秆长度合格率、留茬平均高度为评价指标，根据二次回归正交组合试验原理，进行田间试验。利用Design-Expert V8.0.6.1软件对试验结果进行响应曲面分析，得出该机具最佳作业参数为：机具前进速度3.5 m·s-1、大刀盘转速1 200 r·min-1、小刀盘转速1 380 r·min-1、刀尖离地间隙70 mm。通过田间试验验证，秸秆长度合格率为92.24%、留茬平均高度为74.63 mm，与预测值误差为0.58%和3.71%，参数优化结果可靠。 |
| 英文摘要: |
| To solve the problems of low work efficiency, high stubble retention, and mismatch with existing agronomy, a vertical cotton straw crushing and returning to the field was developed based on the Xinjiang cotton planting model and the requirements of straw crushing machine, mainly consisting of frame, cutting device and power transmission device. Fluent was used for fluid analysis to clarify the performance of the working machine and improve the working quality. The results showed that the new design of polyline rack, three groups of crushing knives, and the angle between the crushing knives and the ground of 3° were beneficial to the straw smash. The forward speed of the machine tool, the speed of the power output shaft and the ground clearance of the blade were selected as the test factors. The qualified rate of the straw length and the average height of the stubble were used as the evaluation indicators. Field experiments were carried out according to the principle of quadratic regression orthogonal combination test. Design-Expert V8.0.6.1 software was employed to conduct response surface analysis on the test results. It was concluded that the best operating parameters of the machine were: machine forward speed 3.5 m·s-1, large cutter head speed 1 200 r·min-1, small cutter head speed 1 380 r·min-1, and the blade tip 70 mm from the ground. Field experiments were conducted to verify the best operating parameters. The results showed that the qualified rate of straw length was 92.24%, the average height of stubble was 74.63 mm, and the error from the predicted value was 0.58% and 3.71%. The parameter optimization results were reliable. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |