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Kinematic Modeling and Characteristic Analysis of Eccentric Conjugate Non-circular Gear & Crank-Rocker & Gears Train Weft Insertion Mechanism 被引量:8
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作者 陈建能 赵华成 +2 位作者 王英 徐高欢 周鸣 《Journal of Donghua University(English Edition)》 EI CAS 2013年第1期15-20,共6页
A novel weft insertion mechanism named eccentric conjugate non-circular gear & crank-rocker & gears train weft insertion mechanism was proposed in order to better meet the requirements of rapier loom's wef... A novel weft insertion mechanism named eccentric conjugate non-circular gear & crank-rocker & gears train weft insertion mechanism was proposed in order to better meet the requirements of rapier loom's weft insertion mechanism as well as reduce the manufacturing difficulty. Meanwhile, based on the working principle of this mechanism, kinematical mathematic models of this mechanism were established and an aided analysis and simulation software was compiled. The influences of eccentricity ratio, deformation coefficient, and other important parameters on the kinematics characteristics of this mechanism were analyzed by using the software. A group of preferable parameters which could meet the requirements of weft insertion technology were obtained by means of human-computer interactive optimization method. The maximum velocity, maximum acceleration, and variation of acceleration of this mechanism are smaller than those of the conjugate cam weft insertion mechanism applied on TT96 rapier loom under the conditions of the same unilateral total stroke of rapier head and the same rotary speed of loom spindle; meanwhile the other demands of weaving technology can be met by this novel weft insertion mechanism. 展开更多
关键词 weft insertion mechanism eccentric conjugate non-circular gear crank-rocker kinematics
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Optimization design and test of rice plug seedling transplanting mechanism of planetary gear train with incomplete eccentric circular gear and non-circular gears 被引量:34
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作者 Ye Bingliang Yi Weiming +2 位作者 Yu Gaohong Gao Yang Zhao Xiong 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2017年第6期43-55,共13页
In order to solve the problem of the high-speed mechanized transplanting of rice plug seedlings,the design requirements of transplanting mechanism for rice plug seedlings were analyzed and a kind of rice plug seedling... In order to solve the problem of the high-speed mechanized transplanting of rice plug seedlings,the design requirements of transplanting mechanism for rice plug seedlings were analyzed and a kind of rice plug seedling transplanting mechanism of planetary gear train based on the drive with incomplete eccentric circular gear and non-circular gears was designed innovatively.The laboratory kinematics was examined.The working principle of the transplanting mechanism for rice plug seedlings was studied,kinematics analysis of the transplanting mechanism was carried out and its kinematic model was set up.A human-computer interaction optimization method was used to optimize the parameters of the transplanting mechanism.The computer aided analysis and optimization software of the transplanting mechanism based on Visual Basic 6.0 was developed.Through analyzing the influence of design variables on the optimization objectives of the transplanting mechanism,a set of parameters of the transplanting mechanism which meet the requirements of transplanting trajectory and posture for transplanting rice seedlings were obtained by means of human-computer interaction.The structure of the transplanting mechanism was designed according to this set of parameters,and its virtual prototype and physical prototype were set up and manufactured,respectively.The kinematic simulation test and high-speed photography kinematic test of the transplanting mechanism were conducted to obtain its kinematic performances,such as transplanting trajectory and posture.The results of bench test,simulation analysis and theoretical analysis were almost in agreement,which verified the correctness of the theoretical model and design results of the transplanting mechanism,indicating that the optimized transplanting mechanism can satisfy the requirements of transplanting rice seedlings and be applied in the rice plug seedling transplanter. 展开更多
关键词 plug seedling transplanting mechanism incomplete eccentric circular gear non-circular gear planetary gear train optimization design
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高阶变性偏心共轭非圆齿轮的凹凸性及根切判别 被引量:14
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作者 陈建能 叶军 +2 位作者 赵华成 徐高欢 王英 《中国机械工程》 EI CAS CSCD 北大核心 2014年第22期3028-3033,共6页
为满足一个运动周期内传动比有多个非对称变化的要求,提出了一种新型非圆齿轮形式——高阶变性偏心共轭非圆齿轮,建立了高阶变性偏心共轭非圆齿轮节曲线方程。依据微分几何原理,推导建立了主从动轮节曲线的凹凸性判别条件和加工过程中... 为满足一个运动周期内传动比有多个非对称变化的要求,提出了一种新型非圆齿轮形式——高阶变性偏心共轭非圆齿轮,建立了高阶变性偏心共轭非圆齿轮节曲线方程。依据微分几何原理,推导建立了主从动轮节曲线的凹凸性判别条件和加工过程中不发生根切时齿轮模数与节曲线最小曲率半径之间的关系。运用VB语言编写了高阶变性偏心共轭非圆齿轮的设计与仿真程序,并通过算例予以验证。 展开更多
关键词 高阶变性 偏心齿轮 凹凸性 根切校验
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变形偏心非圆齿轮行星系分插机构设计和参数优化 被引量:16
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作者 赵匀 高林弟 +1 位作者 陈建能 张国凤 《农业机械学报》 EI CAS CSCD 北大核心 2011年第12期74-77,共4页
提出了一种变形偏心非圆齿轮分插机构,利用变形特性对分插机构取秧、送秧、插秧和回程的时间进行了重新分配,减小了秧针的相对速度。对分插机构进行了运动学分析和建立了数学模型,应用VB编程语言开发了运动分析模拟软件及其优化程序。... 提出了一种变形偏心非圆齿轮分插机构,利用变形特性对分插机构取秧、送秧、插秧和回程的时间进行了重新分配,减小了秧针的相对速度。对分插机构进行了运动学分析和建立了数学模型,应用VB编程语言开发了运动分析模拟软件及其优化程序。在程序界面上显示分插机构的各种运动特性和优化结果,提高了人机交互的效率,可以方便快捷地得到一组优化数据,提高机器开发成功率。 展开更多
关键词 变形偏心非圆齿轮 行星轮分插机构 设计 优化
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外啮合齿轮泵齿轮副的偏心设计
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作者 李玉龙 唐茂 孙付春 《机械科学与技术》 CSCD 北大核心 2014年第11期1652-1655,共4页
为提高泵齿顶间隙内的润滑性能,提出了旨在强化其内动压润滑效应的齿轮副偏心设计方法,通过综合考虑泵体变形、轴-轴承不同心等因素,建立了压差流与剪切流组合下的齿顶泄漏公式,并由该泄漏的最小化条件计算出齿轮副相对于泵壳中心的偏... 为提高泵齿顶间隙内的润滑性能,提出了旨在强化其内动压润滑效应的齿轮副偏心设计方法,通过综合考虑泵体变形、轴-轴承不同心等因素,建立了压差流与剪切流组合下的齿顶泄漏公式,并由该泄漏的最小化条件计算出齿轮副相对于泵壳中心的偏心距。结果表明,转速越高,偏心距越小,泄漏越小,容积效率提升明显;出口压力越大,偏心距越接近上限值,泄漏越大,容积效率提升不明显等。最终,得出了通过齿轮副的偏心,齿顶间隙内动润滑效应明显的重要结论。 展开更多
关键词 齿轮泵 剪切流 偏心距 设计 效率
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偏心套转速对螺旋锥齿轮摆辗成形的影响
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作者 高玉凡 朱春东 +1 位作者 朱兴元 王莹珺 《锻压技术》 CAS CSCD 北大核心 2019年第5期41-47,共7页
摆辗成形过程中不同的上模运动轨迹对螺旋锥齿轮的摆辗成形有重要的影响,而上模的运动轨迹由内外偏心套的转速决定。单辊摆辗过程中,偏心套转速的改变会引起玫瑰线和螺旋线运动周期和轨迹形状的改变。以材料为20CrMnTiH钢的螺旋锥齿轮... 摆辗成形过程中不同的上模运动轨迹对螺旋锥齿轮的摆辗成形有重要的影响,而上模的运动轨迹由内外偏心套的转速决定。单辊摆辗过程中,偏心套转速的改变会引起玫瑰线和螺旋线运动周期和轨迹形状的改变。以材料为20CrMnTiH钢的螺旋锥齿轮为研究对象,通过UG建立了三维有限元模型,并利用Deform-3D详细研究了当偏心套转速不同时,轨迹运动周期和轨迹形状的变化对摆辗成形螺旋锥齿轮成形力能参数、变形均匀性、齿根损伤因子和接触面积的影响规律。结果表明:不同的偏心套转速对玫瑰线和螺旋线摆辗成形螺旋锥齿轮的影响规律具有相似性,螺旋锥齿轮在玫瑰线和螺旋线轨迹摆辗成形过程中取周期T=3 s、转速比|n_1/n_2|=6/7较为合适。 展开更多
关键词 偏心套转速 螺旋锥齿轮 deform-3D 等效应变 成形载荷
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