Positive and negative pressure air suction type roller precision seed-metering device

Abstract

The invention discloses a positive-negative pressure air suction type roller precision seed-metering device. The seeder is simple in structure, easy to operate and high in seeding efficiency. The device mainly comprises a roller air suction collecting and discharging module, an air conveying module, a transmission module, a vibration module and a rack module. The roller air suction collecting and discharging module is mainly composed of a roller, a shell, a brush, a hollow shaft, a positive pressure area and a negative pressure area. The device is characterized in that mechanical force drives a roller to rotate through a driven chain wheel; the fan is connected with a hollow shaft fixed on the rack through an air supply pipe to form a negative pressure area in the roller; during seed filling, a vibration block and a spring which are arranged on the seed box work so as to improve the seed filling performance of the seeds, during seed carrying, the seeds rotate along with the roller by virtue of friction force of rotation of the roller and suction force provided by a negative pressure area, and when the seeds rotate to the brush, redundant seeds are not damaged and removed so as to reduce the reseeding rate. A positive pressure area is arranged close to the position under the roller, the open holes are communicated with the atmospheric pressure, the positive pressure area is formed, meanwhile, seed metering is facilitated, when the roller rotates to the positive pressure area, negative pressure disappears, and seeds fall into a seed outlet below the roller by means of the gravity of the seeds, so that seed throwing is achieved.

Description

technical field [0001] The patent of the invention discloses a positive and negative pressure air suction roller precision seed metering device, which relates to the technical field of agricultural machinery. Background technique [0002] With the rapid development of modern agricultural technology, precision agricultural technology is being promoted in the direction of high speed and precision. During sowing operations, precision and high-speed sowing can not only reduce a large amount of waste of seeds, reduce production costs, rob farming time, improve sowing efficiency, and have a significant role in promoting production increase and stability, and has certain economic benefits; but at the same time, there are certain defects. : The size of different seeds is often considered when designing the drum, so it is necessary to drill many adsorption holes of different sizes and staggered rows, which will reduce the pressure in the negative pressure chamber and cannot provide s...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the object of the present invention is to provide a positive and negative pressure air-suction drum precision seed metering device to improve the problem of unstable sowing of existing air-suction seeders.

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