Pneumatic combined hole type corn precision seed metering device

Abstract

The invention relates to a pneumatic composite hole-type maize precision metering device. The pneumatic composite hole-type maize precision metering device is characterized by comprising an upper shell of a seed-metering device, a lower shell of the seed-metering device, a discharge plate, a conveying device, a gas distribution chamber shell, a seed pushing plate, a seed scrapping plate, a seed cleaning wheel and a feed shaft, wherein the upper shell of the seed-metering device and the lower shell of the seed-metering device are buckled together to form a round chamber; the gas distribution chamber shell is arranged on the outer side of the upper shell of the seed-metering device; positive pressure air enters the round chamber through a gas distribution chamber, so that the round chamber is full of positive pressure; the discharge plate is disc-shaped, and a plurality of guide grooves in curved strips type are evenly arranged at the circumference of the outer edge of the discharge plate; chamfering angles are arranged at the edges of the guide grooves; the lower surface of the discharge plate is clung to a seal ring inside an annular groove embedded into the lower shell of the seed-metering device; the combined holes are formed by the guide grooves which are not covered; the seed pushing plate is circular-arc-shaped, a strip plate is arranged at the edge of the lower segment of the seed pushing plate, and the outer edge of the seed pushing plate is tangent with the initial end of each guide groove; convex teeth of the seed cleaning wheel are clamped into the combined holes of the discharge plate to be meshed with the discharge plate, and rotate along with the discharge plate.

Description

technical field [0001] The invention relates to a seed metering device in the field of agricultural machinery, in particular to a pneumatic combined hole precision seed metering device for corn. Background technique [0002] Maize mechanized precision sowing can save artificial thinning, save seeds, increase production and save costs, so it has become the development trend of corn sowing in recent years. The seed metering device with stable performance and high-speed operation has become the key to realize the mechanized precision sowing of corn. [0003] The air-suction seed metering device is more suitable for round seeds, the damage rate is small, and it can be applied to high-speed sowing operations. It is currently the seed metering device commonly used by domestic pneumatic corn precision seeders. The air suction seed metering device is composed of a suction chamber and a seed storage chamber, separated by a seed tray. The suction chamber is connected with the fan th...

AI Technical Summary

Problems solved by technology

However, the adaptability to non-round seeds such as corn is poor, mainly due to the high requirements on negative pressure stability, seed layer height and seeding disc rotation speed during the filling process, so the poor filling performance leads to its practical The rate of missed seeding is high during operation, especially when the rotation speed of the head fan is insufficient and the air pressure is insufficient.

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