牧草播种机排种装置关键部件设计

在完成牧草种子机械物理特性研究的基础上，设计了一种多行一器的排种装置。该装置由调节螺杆、搅拌器、排种器壳体、中央排种槽轮等组成。排种量通过调节螺杆调整中央排种槽轮相对于排种器壳体的工作长度来设定，槽轮壳体内的搅拌器用于防止种子架空，大小不同的种子的排种则通过调节槽轮机构内部元件位置来实现。完成了中央排种槽轮结构的设计，并根据结构设计参数及种子的物理特性参数，对不同种子公顷排种量进行了计算，制作了中央排种槽轮工作长度标尺，标尺标值与不同种子公顷排种量一一对应。

Design for Metering Device Key Parts of Pneumatic Grass Seeder

Based on the mechanical and physical properties study of forage grass seeds, a multi-line with one-device type metering device was designed. It was composed of adjustable screw, stirrer, metering device housing and central metering sheave and so on. The sowing rate can be set by turning the screw to change working length of central metering sheave relative to metering device housing. The stirrer inside of the sheave housing was used to prevent seeds overhead. And metering of different sizes of seed was adjusted by changing the position of internal components of slot wheel mechanism. Innovative design on structure of the central metering sheave was finished. According to the structure parameters and physical characteristic parameters, different seed sowing rate of per hectares was calculated. And then the working length scale of the central metering groove wheel was made. And there was a one-to-one correspondence between scale values and sowing quantity per hectare of different kinds of seed.