摘要
为解决传统粉碎机动刀片在切割过程中能耗较大,切割时受力不均、震动等问题,设计了等滑切角刀刃曲线并进行了优化。采用对数螺线方程设计了等滑切角刀刃曲线;通过对玉米秸秆质点的运动学分析,建立了功耗模型;并获取了理论最优滑切角,对刀刃曲线进行了优化,并对不同滑切角的刀刃实施了对比切割试验。试验表明:优化后的48°等滑切角刀刃能耗最低,对不同含水率的玉米秸秆均具有良好的适应性,粉碎效果良好,切割性能最佳。
In order to solve the problems of a traditional straw shredder, such as in the process of its cutting, uneven force, vibration and enormous energy consumption, designing the equal sliding-cutting curve and optimized it. In this paper, the principle of logarithmic spiral equation was applied to design some sliding-cutting curves to solve the above problems. Through corn stem particles kinematics analysis, the low energy consumption model was established. By means of energy consumption model, the theoretical optimal sliding-cutting angle was gotten. The blade curve is optimized under the premise of ensuring shredding effect. And a series of experiments of different sliding-cutting angle blades were done by comparing cutting the same sample. The test shows that when comparing with straight edge blade, arc blade, 30° and 60°, the 48° sliding-cutting angle blade has the lowest power consumption with 0.28KW · h, it also has the best adaptability to the corn stalk with different moisture content. So its cutting performance is good and can be of help to enhance the straw shredder working performance significantly.
出处
《机械设计与研究》
CSCD
北大核心
2017年第6期130-133,共4页
Machine Design And Research
基金
贵州省高层次创新型人才培养计划资助项目(黔科合平台人才[2016]5659)
校企合作项目(201645000034018)
校企合作项目(701355141203)
关键词
秸秆
滑切角
对数螺线方程
刀刃曲线
优化设计
straw
sliding-cutting angle
logarithmic spiral equation
edge curve
optimization design
