犁体结构参数与工作参数优化设计  

Optimized Design of Plough Body Structural and Working Parameters

作　　者：翟力欣[1] 姬长英[2] 丁启朔[2] 郁隐梅[2] 

机构地区：[1]金陵科技学院机电工程学院,南京211169 [2]南京农业大学工学院,南京210031

出　　处：《农业机械学报》2013年第8期57-62,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50675107);金陵科技学院科研基金资助项目(JIT-B-201220)

摘　　要：流变态土壤的特有力学性质决定着流变态土壤环境下的犁具、旋耕刀具等农业机械应与北方旱作条件下的有所不同。为在流变态土壤条件下,优化犁体的结构参数和工作参数,以达到改善其性能和提供一个降低能耗的途径,应用3种犁体,以耕作能耗最小为目标,对犁体的工作参数进行了四因素三水平正交试验,同时应用ANSYS软件进行了相应的数值分析。试验结果表明,耕深对能耗的性能指标影响显著。通过试验结果分析确定最佳优化方案为:耕速0.8 m/s,耕深20 cm,同时验证了模拟的可行性。进而应用数值分析的方法对犁体结构参数推土角、起土角、覆土角和犁体高度进行优化。通过数值分析结果确定犁体推土角为90°、起土角为35°及犁体高度为200 mm时,其耕作比阻优化结果为0.69 N/cm2。Plowing in rheological soil is a unique tillage practice in humid or water logged agricultural production regions in China.System optimization of moldboard plough for rheological soil condition is necessary for improving its performance and providing a reduced draft and minimized energy consumption.An orthogonal test using four factors with three levels was conducted to optimize plough body structural and working parameters.Significant influence of tillage depth on the plough ’s performance was observed in the experiment.The optimum working condition occurred at a forwarding speed of 0.8 m / s and a tillage depth of 20 cm.This result was further evaluated and optimized with computer simulation,from which the structural parameters such as pushing angle,cutting angle,covering angle and height of plow were optimized.The simulation results proved that tilling rheological soil with a plow having a cutting angle of 35°,pushing angle of 90° and plow height of 200 mm provided the minimum specific draft of tillage,which was 0.69 N / cm2.

关 键 词：犁体 参数 优化设计 正交试验 

分 类 号：S233.1[农业科学—农业机械化工程]