稻油轮作区驱动圆盘犁对置组合式耕整机设计与试验
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农业部公益性行业科研专项(201503118-06)、农业部科研杰出人才及创新团队项目、湖北省技术创新专项重大项目(2016ABA094)、国家油菜产业技术体系专项(CARS-12)和中央高校基本科研业务费专项(2662017PY006)


Design and Experiment on Symmetrical Driven Disc Plows Combined Tillage Machine for Rice-Rapeseed Rotation Area
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    摘要:

    针对长江中下游稻油轮作区油菜种植时土壤黏重板结、秸秆量大、播种作业需同步开畦沟的农艺要求,考虑传统耕整作业耕层浅、功耗大的不足,依据驱动圆盘犁组与传统铧式犁相比,不易缠草堵塞、通过性好、牵引阻力小的特征,设计了用于油菜播种的驱动圆盘犁对置组合式耕整机。提出了主动式对置犁耕与被动式开畦沟、碎土、平整相结合的联合耕整作业方案,分析了对称布置的圆盘犁组的动力学和运动学特性,确定了其主要结构和工作参数。根据犁体曲面成形原理,设计了开畦沟前犁犁体曲面;依据组合式船型开沟器与土壤挤压互作机制的分析,确定了开畦沟区域宽度为350mm时,开畦沟系统作业后可有效保证畦沟和种床厢面质量。耕深稳定性试验表明,整机作业实际耕深与限深深度基本一致,耕深稳定性系数均在90%以上。厢面质量试验表明,开畦沟系统在中间开畦沟区域能开出沟宽241.6~293.5mm,沟深328.6~370.8mm的梯形沟。经组合式船型开沟器挤压的土壤对犁沟的实际填埋率高于87.67%,碎土辊作业后厢面平整度为22.45~26.70mm,碎土率为60.14%~68.37%。正交试验结果表明,整机较优工作参数为:限深深度为180mm,机组前进速度为3.5km/h,圆盘犁组转速为160r/min,此时整机功耗为24.37kW,相比传统旋耕方式的油菜播种种床整备机具的功耗降低了37.67%,秸秆埋覆率为92.78%,碎土率为66.74%,厢面平整度为24.18mm,土壤对犁沟平均填埋率为92.3%,满足油菜播种的农艺要求。

    Abstract:

    Considering the soil of in mid-lower Yangtze River is sticky and the amount of straw is large, the furrow should be ditched while rapeseed is planting, which leads the power consumption of traditional tillage is large. Compared with the traditional plow, driven disc plows are not easy to be blocked and traction resistance is small. The design of symmetrical type driven disc plows combined tillage machine for rice-rapeseed rotation area was carried out. According to dynamics and kinematic analysis of driven type disc plows, its main structure and technical parameters were analyzed and determined. Based on the principle of plow forming and soil extrusion, the surface of front ditch plow was designed, and it was determined that when the width of ditching area was 350mm, the quality of furrow and seedbed can be ensured. The tillage depth stability experiments results indicated that actual working depth of the machine was consistent with the control depth, and tillage stability coefficients were more than 90%. The seedbed quality experiments results showed that the depth and width of furrows which was ditched by ditching system were 241.6~293.5mm and 328.6~370.8mm, respectively. The soil squeezed by combined ship type opener can effectively filled the furrows which was formed by driven disc plows, the actual landfill rate of furrows was more than 87.67%. The seedbed roughness was 22.45~26.70mm,soil crushing rate was 60.14%~68.37%. The orthogonal test indicated that the optimum operation condition was the tillage depth was 180mm, the speed of machine was 3.5km/h, and operating speed of driven disc plows was 160r/min. Under this condition, the power consumption was 24.37kW, straw coverage rate was 92.78%, soil crushing rate was 66.74%, seedbed roughness was 24.18mm, and landfill rate was 92.3%. The experiment results showed that the quality of symmetrical type driven disc plows combined tillage machine satisfied the actual production requirements of rapeseed planting. The research conclusion had great theoretical value and practical significance to the design of machine which worked for planting rapeseed.

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刘晓鹏,张青松,肖文立,马磊,刘立超,廖庆喜.稻油轮作区驱动圆盘犁对置组合式耕整机设计与试验[J].农业机械学报,2017,48(12):33-41.

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  • 收稿日期:2017-08-05
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  • 在线发布日期: 2017-12-10
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