周浩,胡炼,罗锡文,赵润茂,许奕,杨伟伟.旋耕机自动调平系统设计与试验[J].农业机械学报,2016,47(s1):117-123.
Zhou Hao,Hu Lian,Luo Xiwen,Zhao Runmao,Xu Yi,Yang Weiwei.Design and Experiment on Auto Leveling System of Rotary Tiller[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(s1):117-123.
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旋耕机自动调平系统设计与试验   [下载全文]
Design and Experiment on Auto Leveling System of Rotary Tiller   [Download Pdf][in English]
投稿时间:2016-07-20  
DOI:10.6041/j.issn.1000-1298.2016.S0.018
中文关键词:  旋耕机  自动调平  耕深  平整度
基金项目:公益性行业(农业)科研专项(201203059)、“十二五”国家科技支撑计划项目(2014BAD01)、国家自然科学基金项目(31601225)、广东省科技计划项目(2015B020206002)和广东省自然科学基金项目(2015A030310292)
作者单位
周浩 华南农业大学 
胡炼 华南农业大学
南方粮油作物协同创新中心 
罗锡文 华南农业大学 
赵润茂 华南农业大学 
许奕 华南农业大学 
杨伟伟 华南农业大学 
中文摘要:由于农田田面坑洼不平,拖拉机在田间工作过程中左右轮不在同一水平面上行走,导致通过拖拉机三点悬挂机构挂接的旋耕机随着拖拉机的倾斜而倾斜。旋耕机倾斜作业不仅破坏农田硬底层,还影响旋耕机的耕后平整度和耕深等旋耕性能指标,导致旋耕作业效果差、作业效率低。设计了一种旋耕机自动调平系统,由旋耕机构、调平支撑架、液压系统和自动调平控制系统组成。调平支撑架前端与拖拉机三点悬挂机构连接;旋耕机构通过销轴悬挂于调平支撑架后下方;调平油缸一端与调平支撑架侧边铰接,另一端与旋耕机构铰接,通过调平油缸的伸缩实现旋耕机构相对于调平支撑架的左右上下摆动。自动调平控制系统根据拖拉机横滚角度控制电磁换向阀驱动调平油缸伸缩调节旋耕与调平支撑架的相对角度,即旋耕机构与拖拉机的相对角度,通过直线位移传感器测量调平油缸的伸长量,利用旋耕机与调平支撑架的几何关系实现旋耕机构的自动调平闭环控制,使旋耕机始终保持期望的角度进行旋耕作业。对自动调平旋耕机和无调平功能旋耕机在有垄菜田进行了试验,利用水准仪采集试验前后田块地表平整度数据,2台姿态传感器分别采集拖拉机倾角和旋耕机倾角信息,分析了2种旋耕机作业后的平整度和耕深两旋耕性能指标,以及旋耕机自动调平控制系统的性能,结果表明:自动调平旋耕机相对于无调平功能旋耕机耕后地表横向平整度显著提高,前者耕后垄面横向最大高差为1.9cm,后者达9.8cm;自动调平旋耕机横向耕深稳定,耕深横向最大高差为1.8cm,而无调平功能旋耕机耕深横向最大高差达9.7cm。
Zhou Hao  Hu Lian  Luo Xiwen  Zhao Runmao  Xu Yi  Yang Weiwei
South China Agricultural University,South China Agricultural University;Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China,South China Agricultural University,South China Agricultural University,South China Agricultural University and South China Agricultural University
Key Words:rotary tiller  auto leveling  tillage depth  surface flatness
Abstract:Rotary tiller is a land preparing implement with great practicability, which is widely used to reduce the farming time and labor spend. The left and right wheels of tractor don’t work in the same horizontal plane in practical due to the uneven farmland. Rotary tiller and tractor are connected by the three point hitch, which means the rotary tiller has the same gesture as the tractor during the rotary tillage. Rotary tilling in lateral inclination gesture will not only destroy the untilled bottom of the farmland, but also affect the tillage flatness, tillage depth etc. All of this will ultimately lead to the poor rotary tilling quality and low working efficiency. To decrease the influence of rotary tiller working in lateral inclination gesture, a rotary tiller auto leveling system was designed which mainly including rotary tiller, leveling rack, hydraulic control system and the auto leveling control system. The front of leveling rack was connected to the tractor three point hitch while rotary tiller was hanged in the lower back of the leveling rack with two pin rolls. One end of the leveling cylinder was hinged with leveling rack while the other was hinged with the rotary tiller. Therotary tiller rotated relatively to the telescopic movement of the leveling cylinder. Auto leveling control system controlled the solenoid directional valve according to roll angle of the tractor detected by angle sensor, and drove leveling cylinder stretching out and drawing back to adjust the angle between the rotary tiller and leveling rack (namely the angle between the rotary tiller and tractor). An auto leveling close cycle control was designed to keep rotary tiller working in a desired angle by the means of combining the leveling cylinder elongation detected by the linear displacement sensor and the geometrical relationship between rotary tiller and leveling rack. Experiment was taken in ridge vegetable lands between auto leveling rotary tiller and the non leveling rotary tiller. The data of the surface flatness of the field before and after plowing was collected by the level gauge, while the tractor roll angle and rotary tiller leaning angle were collected respectively by two attitude sensors at the same time. The tillage flatness and tillage depth of two kinds of rotary tillers and the performance of auto leveling system were analyzed. Experimental results show that the surface flatness by the auto leveling rotary tiller was improved significantly comparing to the non leveling rotary tiller, the maximum height difference of the auto leveling rotary tiller in lateral direction was 1.9cm, while the non leveling rotary tiller was 9.8cm; the tillage depth of auto leveling rotary tiller in lateral direction was more stable, the maximum height difference in lateral direction of the tillage depth was 1.8cm, while the non leveling rotary tiller was 9.7cm.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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