Positive-pressure pneumatic high-speed precision seed-metering device

Abstract

The invention discloses a positive-pressure pneumatic high-speed precision seed-metering device and belongs to agricultural machinery. A positive-pressure air inlet and a seed inlet are formed in a right shell, an adjusting baffle, a seed-metering pipe, a driving shaft, an arc-shaped seed returning plate, a seed-receiving pipe and a seed containing groove plate are installed on the right shell, a seed filling and discharging disc with a seed filling and discharging through hole and a seed stirring groove is fixedly installed on the driving shaft through a driving base, a seed cleaning wheel is assembled on the right shell through main shafts A and B, a driving frame with driving racks A and B, auxiliary shafts A and B, a driven frame with driven racks A and B and a connecting plate, a pressure relief wheel and a rod type seed ejecting wheel are arranged on the left shell with an exhaust port, and the left shell and the right shell are relatively and fixedly assembled into a whole. The structure that positive-pressure air flow completes positive-pressure forced seed filling, positive-pressure air flow forcibly stirs seed piles and positive-pressure air flow forcibly conveys seeds is adopted, the technical problem of a negative-pressure air suction seed-metering device is solved, and the positive-pressure pneumatic high-speed precision seed-metering device is novel, unique and reasonable in structure, low in power consumption, high in seed filling rate, low in miss-seeding and hole rate, good in seed-metering uniformity and accurate in seed distance.

Description

technical field [0001] The invention belongs to agricultural machinery, and mainly relates to a positive pressure pneumatic seed metering device. Background technique [0002] At present, the negative pressure air suction seed metering device, which adopts the principle of negative pressure air suction for filling and sorting operations, has been widely used in agricultural sowing operation tools, and has become an important operating part equipped on various large-scale seeding tools. . Since the negative pressure air suction seed metering device is based on the negative pressure air suction principle as the basic theory of research and design, it must also adapt to and meet the requirements of this basic theory in terms of structure. However, in the practice of production operations, it is found that: ①, the negative pressure air suction seed metering device needs a large negative pressure suction when sucking seeds under negative pressure, and the power consumption for g...

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Problems solved by technology

[0005] The invention adopts the positive pressure airflow and positive blowing pressure to complete the positive pressure forced seed filling on the seed filling and discharging tray, the forced stirring of the seeds in the seed pile in the seed holding tank plate, and the forced seed infusion of the discharged seeds in the seed discharge pipe, which solves the problem It solves the technical problems existing in the existing negative pressure air suction seed metering device, and has the advantages of novel, unique and reasonable structure, low operation power consumption, high seed filling rate, low seeding leakage rate and void rate, good seeding uniformity, and high particle size. The characteristics of precise spacing provide a new mechanism and new structure model for the pneumatic seed metering device

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