In order to improve air pressure utilization and working performance, the direct seed-metering device for rice was designed with spoiler blades embedded in cavity. The study carried out using theoretical analysis hydrodynamic methods obtain optimum structure of blades. Taking rotating speed cavity, negative filling height as test factors, multiple regression response surface were best parameter...

The cylindrical permanent magnet is the core part of the permanent-magnet seed-metering device, it can absorb single magnetic powder coated seed. The first, the magnetic induction intensity model of any point in the cylindrical permanent magnet external was established based on the equivalent current model of permanent magnet. The second, the mathematical formula was derived using the Biot-Sava...

Planting uniformity is a key evaluation index for planters. This paper investigated the effect of rotational speed, angle rake bar chain, and number billets on planting seed-metering device in laboratory. The experimental results showed that optimal can be achieved under chain 117°, 500, speed 70 rpm. Under this condition, quality Zq was 97.22% multiple Zm 0%, while miss Ze 2.78%. Based above p...

The poor adsorption stability of the current air-suction sunflower seed-metering devices under high-speed operation leads to unstable seed posture, as well increases in multiple and miss indices. In order improve adsorption, an device based on structure-assisted stable suction posture was designed, movement mechanism absorption process seed-feeding is analyzed, following which mathematical mode...

In order to meet the sowing demand of hybrid rice plug seedling, a horizontal rotary precision seed metering device was proposed. The key structure parameters were designed, kinematics analysis seed-filling process carried out, and main influencing factors seeding performance evaluation index determined. Taking motor speed, eccentric distance disk, layer thickness as test factors, taking qualif...