A disc air suction seed metering device

Abstract

A disc air-aspiration type seed sowing device is mainly composed of a hollow shaft 1, screws 2, left discs 3, right discs 4, fixing hubs 5, a chain wheel 6, a bearing 7, bolts 8, sealing rings 9, and trapezoid seed-falling pieces 10. Each seed sowing line is provided with a group of discs, each group of discs is composed of a left disc 3 and a right disc 4 which are connected via the screws 2, and each group of discs rotates along with the hollow shaft 1. The rubber sealing rings 9 are embedded in the central axis hole of each disc, the outer circles at opposite sides of each right disc 4 and each left disc 3 are machined with chamfers and flanges 12, the flanges 12 are opposite to form a vacuum cavity, the positions, where the discs are installed, of the hollow shaft 1 are provided with even round holes along the circumferences, and an external air-aspiration fan enables wheat seeds or others to be evenly absorbed in seed absorption seams 11 formed by the left discs and the right discs in the longitudinal direction through the hollow shaft, the round holes of the hollow shaft and the vacuum cavities of the discs. The trapezoid seed-falling pieces 10 are arranged under the seed sowing discs for realizing seed sowing. The disc air-aspiration type seed sowing device can be used for sowing wheat seeds and other crops sowed in strips, and is good in seed sowing uniformity.

Description

Technical field [0001] The invention relates to a seed metering device of a seeder in agricultural machinery, in particular to a disc air suction seed metering device. Background technique [0002] The seed meter is one of the key components that affect the seeding precision and seeding quality of the seeder. At present, the commonly used seed metering devices are divided into two types: mechanical type and pneumatic type. Negative pressure air suction is a commonly used form in pneumatic seed metering devices. Air-suction seed metering devices commonly used in production are mainly used for sowing corn, soybeans and other hole-sowed or on-demand crops. The seed metering devices for row-sowing crops (such as wheat) are mostly grooved wheel seed metering devices, which have large seeding pulsation, With defects such as poor uniformity and low stability, it is difficult to meet the agronomic requirements of precision seeding technology. The national invention patent "circula...

AI Technical Summary

Problems solved by technology

Air-suction seed metering devices commonly used in production are mainly used for sowing corn, soybeans and other hole-sowed or on-demand crops. The seed metering devices for row-sowing crops (such as wheat) are mostly grooved wheel seed metering devices, which have large seeding pulsation, With defects such as poor uniformity and low stability, it is difficult to meet the agronomic requirements of precision seeding technology

The national invention patent "circular tube slit type air suction seeding device" (patent number: ZL200810212285.X) proposes a circular tube air suction seeding device. During production and use, it was found that the device has a complex structure, high manufacturing cost and stable sowing Better performance and uniformity than mechanical metering devices, but still not up to the agronomic requirements of precision seeding

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