文档介绍：万方数据万方数据万方数据山东理工大学硕士学位论文摘要I 摘要水稻作为我国主要的粮食作物之一,在粮食生产中占有至关重要的地位。与发达较低,严重制约了我国水稻种植的发展。因此,大力发展新型高速插秧机,提高插秧效率,对提高我具有重要意义[1]。分插机构是水稻插秧机的核心部件,其性能优劣直接影响插秧质量和效率。目前市场上存在的传统插秧机多采用曲柄摇杆式分插机构,该机构振动较大,转速不易过高,限制了插秧效率。高速插秧机多采用日本研制的偏心齿轮或椭圆齿轮分插机构,结构复杂,成本较高。因此,针对上述分插机构存在的问题,通过对插秧农艺要求和插秧轨迹的分析,本文将偏心齿轮-非圆齿轮行星轮系作为分插机构的传动部件,设计了一种旋转前插式分插机构。本文主要研究内容及结论如下: (1)通过分析当前国内外分插机构研究现状及存在问题,提出了将偏心齿轮-非圆齿轮行星轮系作为分插机构的传动部件,设计出了旋转前插式分插机构,并对该分插机构总体结构及关键部件进行了优化设计,论述了该分插机构的工作原理及特点。(2)分析了旋转前插式分插机构秧爪尖点轨迹,并建立了偏心齿轮-非圆齿轮旋转前插式分插机构运动学模型,分析了该分插机构运动学特性,包括偏心齿轮-非圆齿轮角位移分析、角速度分析、传动比分析及关键点的位移、速度、加速度方程等。(3)采用UG软件建立了偏心齿轮-非圆齿轮旋转前插式分插机构三维模型,并进行了虚拟装配,采用虚拟样机仿真分析软件ADAMS对虚拟样机进行运动学仿真,得到秧爪尖点的运动轨迹和位移、速度曲线,并与理论分析结果相比较,验证了该分插机构设计的合理性。(4)利用ANSYS有限元分析软件,对该分插机构的行星轮进行模态分析,计算出其固有频率和振型,有效预估行星轮结构的振动特性,为行星轮结构优化设计提供理论依据,分析证明行星轮在工作过程中基本不会发生共振,因此,不会对插秧机构造成影响。关键词:高速插秧机,旋转式分插机构,偏心齿轮-非圆齿轮,动态仿真,有限元分析万方数据山东理工大学硕士学位论文ABSTRACTII ABSTRACT Rice is one of the main food crops in China, occupies a pivotal position in food production. Compared with developed countries, China's rice planting mechanization level is low, which seriously restrict the development of rice cultivation in China. Therefore, to develop new high-speed transplanter, improve planting efficiency, has an important significance to improve the level of mechanization of rice planting in China. Transplanting mechanism is the ponent of the rice transplanter, its performance will directly affect the quality and efficiency of planting. At present, the traditional transplanting mechanism in domestic market are almost crank-rocker mechanisms. The mechanism of vibration and speed should not be too high, which limiting the planting efficiency. The eccentric circle gear or the elliptic gear transplanting mechanism which developed in Japan was extensive used in the high-speed rice transplanter. But the transplanting mechanism plicated and the cost is high. Therefore, in view of the above problems of the transplanting mechanism, through the analysis of agronomic requirements a