| 摘要: |
| 【目的】探讨穴播轮成穴部件的运动轨迹，为穴播轮成穴机理研究及穴播轮成穴性能测试提供参考。【方法】利用虚拟样机技术，在UG软件中建立穴播轮运动分析主模型，通过UG用户界面模块、求解器模块和后处理模块，对穴播轮成穴过程，包括成穴过程中成穴部件的开启及运动轨迹、成穴形状等进行仿真分析，利用仿真试验测试不同前进速度、滑移率、入土深度条件下穴孔的大小及不同条件下的成穴效果，并采用正交试验方法分析各因素对穴孔大小的影响。【结果】前进速度对穴播轮成穴性能的影响与成穴部件出土角和入土角有关，且随滑移率的增加而加大，随入土深度的增大而减小；滑移率对穴播轮成穴性能有显著影响，在入土深度一定的情况下，穴孔的大小随滑移率的增加先逐渐减小后又逐渐增大，且活动鸭嘴对穴孔的影响增大，撕膜、挑膜现象加剧；入土深度对穴播轮成穴性能影响显著，随入土深度的增加穴孔增大，但成穴部件入土和出土作业对穴孔、膜孔的影响降低。【结论】所设计的穴播轮在结构及参数上均能较好地满足设计要求，在规定的作业条件下成穴效果满足技术要求。在作业中应尽量减小穴播轮的滑移率，并同时保证入土深度的一致性。 |
| 关键词: 穴播轮 成穴性能 仿真分析 UG参数优化 |
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| 基金项目:安徽省高校省级自然科学基金项目（KJ2013A199）；江苏省自然科学基金项目（BK2012518） |
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| Virtual simulation analysis of cavitation performance on film of a precision dibbler |
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LÜ Xiao-rong,ZHANG Li-hua,LÜ Xiao-lian
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| Abstract: |
| 【Objective】The motion trajectory of punching parts of a dibble wheel was studied to understand the punching mechanism and test the punching performance of the dibbler.【Method】Using virtual prototyping technique,the main motion analysis model of the dibbler was established in the software of UG.With the assistance of UG user interface module,calculation module and post process module,the punching processes including the opening process,the motion trajectory,and cavitation shape during the punching process were simulated and analyzed.Cavitation size and punching effect under different forward speeds,slip rates,and entering soil depths were tested.The influence of various factors on the cavitation size was also analyzed using orthogonal analysis method.【Result】The influence of the forward speed on cavitation performance of the dibbler was related with entering soil angle and outing soil angle.It increased as the increase of the slip rate,while decreased as the increase of the entering soil depth.The influence of slip rate on cavitation performance of the dibbler was very significant.When entering soil depth was unchanged,cavitation size decreased firstly before gradually increasing as the increase of slip rate.The influence of the activity duckbill on cavitation size increased with more intensive film breaking.The influence of entering soil depth on cavitation performance of the dibbler was also very significant.Cavitation size increased as the increase of entering soil depth.Cavitation parts had small effects on cavities and pores.【Conclusion】The structure and parameters of the dibbler met the design requirements and the technical requirements.The slip rate should be minimized,and the entering soil depth should be consistent when operating the dibbler. |
| Key words: dibbler cavitation performance movement simulation UG parameter optimization |
