共查询到18条相似文献,搜索用时 46 毫秒
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【目的】系统阐述新疆农垦科学院机械装备研究所研制的翻转超深耕犁的结构特点和作业机理.【方法】用数据采集器收集了悬挂点所受拉力,经过软件处理显示了实时曲线,了解深耕作业时各悬挂点的受力变化情况.【结果】通过田间试验表明,翻转超深耕犁犁耕深度可达85cm以上,耕深稳定变异系数小于10%,土垡破碎率大于75%,植被覆盖率大于85%,工作可靠性均可达80%以上,各项指标均达到设计要求.【结论】试验证明该型犁具有作业效率高、稳定性好、结构坚固等优点,是一种性能优良的超深耕作业机具. 相似文献
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总结了翻转双向犁耕作前的准备工作、翻转操作、耕作中的调整方法,并介绍了使用中的常见故障以及解决办法,以供参考。 相似文献
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利用拖拉机的牵引力,当体入土时压缩缩弹簧贮存能量,机组耕作到地头拖拉机的液压提升机构将犁体提升后,通过圆柱凸轮机构就能实现双向犁的自动翻转。通过机构设计,运动分析和性能测试,该机构具有设计合理,翻转平稳,运转可结构上有创新性等特点。 相似文献
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此文详述了液压全翻转式双向犁的犁粱、翻转机构、耕幅调节机构、安全防护机构等的最新结构形式,工作原理及其它们的特性等. 相似文献
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采用AutoCAD系统内嵌的二次开发环境Visual LISP语言编程,实现了双向犁液压翻转机构的三维动画仿真,解决了利用“擦画”技术实现机构动画的技术难题。为农业机械设计中新技术的应用提供了新的思路和方法。 相似文献
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为方便广大农机户正确使用液压双向翻转犁,解决用户在使用中的困难,我在从事多年农机推广服务中总结了一些实用调整经验,现以1LF-435B型液压双向翻转犁为例。介绍使用过程中的一些调整方法。1正确的悬挂方法在耕作前,1LF-435B型液压双向翻转犁为三点式悬挂,二点下升降臂安装在犁的两个下拉耳后,再挂中央拉杆,要注意把犁的中心调整在拖拉机的正中心。方法是调整两升降臂与拖拉机大轮胎内侧尺寸对称、相等,然后旋紧两侧拉链螺母,防止在犁地时,犁左右摆动出现合垄不平整 相似文献
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人机工程学所关注对象是人对机操控和搬运的便利性,机的工作环境和制作材料的适应性;追求友好的人机关系;提高劳动效率、减少人的疲劳程度。中国古代垦耕机械犁具从耒耜发展到曲辕犁,即贯穿着上述的设计理念而一步步地走向完善。新中国成立后的一段时期内,犁具设计片面追求它的工作效率,而忽视了犁具制作材料、工作环境的适应性及人与犁的融洽度,其结果是引进的耕犁及后续的新犁设计并没有达到预期的目标。 相似文献
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通过对圆柱型犁体曲面的犁耕阻力分析,找出了犁耕阻力与犁体曲率半径,水平元线角及土垡飞离犁体时与水平线夹角在铅垂面内的投影等参数之间的关系,推导出圆柱型犁体曲面犁耕阻力的修正公式。 相似文献
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虚拟样机技术在1LB-240型水平摆式犁设计中的应用研究 总被引:6,自引:0,他引:6
在分析传统农业机械设计方法中所存在问题的基础上,以1LB-240型水平摆式犁田间试验出现的问题为例,通过应用机械三维设计软件SolidWorks2001及其内嵌于其上的COSMOS\works和DDM,探讨虚拟样机技术在农机产品开发中的应用. 相似文献
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设计悬挂参数往往难于兼顾各方面性能的矛盾要求,确定重量增幅较大的液压翻转犁的悬挂参数尤其困难。为合理确定1LF-335液压翻转犁的悬挂参数,以该犁配套JDT-654拖拉机为研究对象,以较重要的耕深稳定性为目标函数,其余性能要求体现在约束条件和机组校核里,建立多约束单目标优化模型,采用非线性规划BFGS算法求解,并利用MATLAB编程实现,优化设计液压翻转犁的悬挂参数。设计结果和在1LF-335液压翻转犁上应用表明,所选悬挂参数有效实现了各项性能指标兼顾并均达到技术要求,液压翻转犁重量较大,应选用较大允许承载力的限深轮。 相似文献
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邵维民 《西北农林科技大学学报(自然科学版)》1986,(2):42-51
本文介绍了陕西省陕南、陕北、关中三个自然地理环境条件下,在育代表性的土壤上,1L—330型北方系列犁体的“六分力”测定结果。为研制适于上述条件的新型犁体,提供了较可靠的外载荷资料。文章还简要介绍了国内外铧式犁外栽荷测量研究情况。可供有关测试及设计人员参考。 相似文献
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Measurements of mouldboard plow draft can potentially provide a useful tool for continuously mapping, as a surrogate variable, crop limiting soil properties such as soil strength/compaction. Numerous researchers have shown that loading on tillage tools can be periodic. One source of higher frequency periodic loading has been related to failure modes in the soil. Lower frequency periodic loading on tillage tools, assuming tillage depth is relatively constant, more often reflects local spatial variability in soil physical properties such as soil moisture, soil texture, organic matter, and/or soil strength/compaction. This study presents a spectrum and cross-spectrum analysis of mouldboard draft recorded during normal fall plowing operations along adjacent transects. One objective of this study was to determine the dominant periodic components in order to elucidate meaningful frequencies which might be better related to variation in soil physical properties. Spectral densities were generally dominated by signals with a few cycles per 300-m transect. The cross-amplitude and squared coherency between draft recorded on adjacent transects provided further indication of the frequencies which characterized the signals because they provide an indication of correlation as a function of frequency. Spatial dependence in the data was quantified using spatial autocorrelation and cross-correlation. An additional objective was to use the spectral information to help design more physically meaningful filters for the raw draft data. Taking the Fast Fourier Transform of the raw draft data and filtering in the frequency domain using an optimal filter informed via the spectrum and cross-spectrum analysis, provided a convenient method for isolating a more physically meaningful signal. 相似文献
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Lapen D. R. Hayhoe H. N. Topp G. C. McLaughlin N. B. Gregorich E. G. Curnoe W. E. 《Precision Agriculture》2002,3(3):237-257
The primary objective of this investigation was to evaluate some potential causal associations between draft derived from a 3-bottom mouldboard plow during normal fall field operations and soil-crop properties at a field site near Winchester, Ontario, Canada. A secondary objective was to investigate, in a preliminary manner, associations between draft and crop yield (corn, soybean, and wheat). Regression tree analysis indicated that draft variability was best explained by field location, crop type, soil cone penetration resistance in the plow layer, and soil texture in the plow layer. Draft was found to generally increase with cone penetration resistance in the plow layer and soil clay content. Corn yields were negatively associated with draft. The reverse was true for the soybean yields, and a combination of negative and positive draft vs. yield relationships existed for the wheat plots. The overall results indicated that draft data collected during normal field operations can be useful for producers interested in identifying areas in the field where soil strength/compaction might be problematic with regard to crop yields. 相似文献