丘陵地区双向仿形镇压装置设计与试验
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“十二五”国家科技支撑计划项目(2014BAD11B01)和黑龙江省重大科技招标项目(GA14B101-01)


Design and Experiment of Bidirectional Profiling Press Device for Hilly Area
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    摘要:

    针对镇压装置在丘陵地区作业时镇压不均匀、镇压强度不足等问题,借鉴丘陵山地农业机械结构特点,设计了一种能实现双向仿形和镇压强度可调的镇压装置。该装置主要由仿形调节机构、镇压强度调节机构和镇压轮组成。建立了丘陵地形下镇压轮与土壤相互作用模型,对镇压轮进行受力分析,确定镇压轮工作过程,同时对镇压装置进行受力分析,确定弹簧变形量(镇压强度)的合理范围。进行对比试验和田间性能试验,采用L9(34)正交试验,考察镇压轮类型、镇压强度、作业速度对镇压装置作业性能的影响,得到了各因素的主次顺序:镇压轮类型、弹簧变形量(镇压强度)、作业速度,最优组合:橡胶镇压轮、弹簧变形量20mm、作业速度1m/s,此时牵引阻力为22.3N,根冠比为0.271。通过对比试验,证明仿形镇压装置更能保证镇压均匀性。

    Abstract:

    According to the deficiencies in uneven soil compaction and insufficient intensity in hilly region,the bidirectional profiling and strength adjustable press device was designed based on the hilly agricultural mechanical characteristics, which mainly consisted of profiling adjusting mechanism,strength adjusting mechanism and press wheel. The interaction model of soil and press wheel was established. Force analysis of press wheel was carried out to determine working process of press wheel. Force analysis of press device was carried out to determine the reasonable range of spring deformation (suppression of strength). The contrast test was done to verify the device performance of profiling, and the orthogonal tests were done to verify the hilly terrain repression wheel, soil interaction models along the correctness of draft force (activity-based costing) and ratio of root to shoot (crop growth state), and the factors affecting the changing rule of performance test. The effects of device under type of press wheel, intensity of the suppression and forward velocity were studied. In order to achieve the purpose of balancing the various indicators, the best combination was determined by using comprehensive weighted scoring method. The results of orthogonal tests of L9(34) showed that the primary sequence of factors was as following: press wheel, suppress strength and forward velocity, and the optimal combination was: rubber press wheel, spring deformation amount of 20mm and forward velocity of 1m/s. Under the conditions, the rate of draft force was 22.3N, and the ratio of root to cap was 0.271. The result of contrast test showed that profiling press device was good in ensuring the uniformity of soil compaction. The result provided valuable information for the design of press wheel of planter.

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赵淑红,刘宏俊,谭贺文,杨悦乾,张先民.丘陵地区双向仿形镇压装置设计与试验[J].农业机械学报,2017,48(4):82-89.

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  • 收稿日期:2016-08-11
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  • 在线发布日期: 2017-04-10
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