摩擦型立式圆盘精密排种器的设计与试验

为了解决机械式排种器种子充填力小、充填极限速度低的问题,该文提出了一种新的摩擦式精密排种器的结构,并研究了种子在充种空间内的受力、运动机理,该结构依靠摩擦式排种盘对种子的摩擦力驱使种子流动,增大种子充填力,改善充种效果。样机台架试验表明,在粒距为10 cm,种床带速为10.1 km/h时,排种盘型孔的极限线速度达到0.66 m/s,此时合格指数>95%,重播指数<5%,漏播指数<5%,该排种器能够满足高速精播要求。

Design and experiment of friction vertical plate precision seed-metering device

In order to solve the problems of low dropping limit velocity and small filling power, a new type of friction plate precision seed-metering device was devised, and the force and movement mechanism of seeds were analyzed in the course of filling seeds space. The seeds were driven to flow by the friction on the friction plate, and the filling power increased as well as the efficiency was improved. The new device was tested on test bench and the result indicated that when the plant spacing was 10cm, seedbed belt speed was 10.1 km/h, the limited speed of seed plate reached to 0.66m/s, and the qualification index was higher than 95%, overlapping seeding index was lower than 5% and missing seeding index was lower than 5%. It is shown that the seed meter is suitable for high-speed and accurate sowing.