An inner positive pressure combined seed metering device

Abstract

The invention discloses an inner positive pressure combined seed metering device, which comprises a front housing, a rear housing, a seeding disc, a seed unloading wheel and a seeding shaft; the wall thickness of the seeding disc is evenly distributed along the circumferential direction A number of combined holes composed of filling grooves and inoculation holes; air holes are provided on the bottom of the filling groove of each combined hole, and an air hole channel is opened on the seeding tray at the position of each air hole, and the air hole channel includes a A curved channel and a horizontally arranged straight channel, the edge of the cover plate of the rear housing is provided with an arc-shaped through hole, and the other end of the straight channel runs through the rear and the arc-shaped through hole on the rear housing along the axial direction of the seed tray It is connected with the atmosphere through the arc-shaped through hole. The inner seed filling type is combined with the air pressure type. In the seed filling stage, the seeds are first filled into the filling groove, and then pressed onto the air holes. Due to the constraints of the applied force and the depth of the filling groove, the The seeds will not slip out within a certain range, which increases the time for the seeds in the filling groove to be pressed and attached to the air holes.

Description

technical field [0001] The invention belongs to the technical field of sowing in agricultural machinery, and in particular relates to an internal positive pressure combined seed metering device. Background technique [0002] Precision seeding is an inevitable trend in the development of modern planting industry. It has the advantages of saving labor and cost, improving crop yield and quality, etc. The main factor in achieving precision seeding depends on the performance of the seed meter. Precision seed meters can be divided into mechanical type and pneumatic type according to their working principle. The mechanical seed metering device is simple in structure, low in cost, and easy to use and maintain, but it has strict requirements on the shape and size of seeds and a high rate of damage to seeds, which cannot meet high-speed precision sowing operations. At present, pneumatic seed metering devices are widely used in precision seeders at home and abroad. It has strong appl...

AI Technical Summary

Problems solved by technology

[0003] The filling method of the traditional pneumatic seed metering device is that the seeds are adsorbed or pressed on the stomata under the action of the airflow. Due to the interaction between the seeds, when entering the seed cleaning area, the seeds held on the stomata are generally close to the stomata in the seed group and For the seeds in the upper position, when the seeding disc is rotating at high speed, the filling time is short, and the adsorption or pressure adhesion performance is not good, which may easily lead to a high leakage filling rate.

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