Pneumatic swing type quantitative seed-metering device and quantitative seed-metering method thereof

Abstract

The invention discloses a pneumatic swing type quantitative seed-metering device and a quantitative seed-metering method thereof. An existing seed-metering device has a large seed-carrying stroke and is liable to damage and clamp seeds. A top part of a seed-metering swinging piece is fixed with a transmission shaft, two vent grooves are formed in an arc-shaped slide way on one side of a bottom part, and two exhaust nozzle units are arranged on an arc surface of the bottom part; each exhaust nozzle unit consists of n exhaust nozzle groups; each exhaust nozzle group consists of two exhaust nozzles; a ventilation chamber is provided with a positive pressure interface and two negative pressure interfaces; the ventilation chamber and the transmission shaft form a revolute pair; a second arc-shaped block and an arc-shaped slide way of the seed-metering swinging piece form a sliding pair; two seed boxes are respectively arranged on two sides of the transmission shaft and seed conveying plates are arranged at bottom parts of the seed boxes; N seed conveying grooves in one-to-one correspondence with the exhaust nozzle groups are formed in top surfaces of the seed conveying plates; and seed cleaning blocks are arranged at output ends of the seed conveying grooves and two seed containing grooves are formed between the seed cleaning blocks and two side walls of the output end of each seed conveying groove. A distance from a negative-pressure seed suction position to a positive-pressure seed metering position is short, and a seed carrying distance is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a pneumatic swing type quantitative seed metering device and a quantitative seed metering method thereof. Background technique [0002] The seed meter is one of the key components of the seeder, and its working performance directly affects the sowing accuracy, uniformity, and seed emergence rate. There are many kinds of seed metering devices, mainly divided into mechanical seed metering devices and pneumatic seed metering devices. Seed size and shape are not strictly required, and the seed damage rate is small. [0003] At present, the powerful roller seed metering device uses negative pressure to adsorb the seeds on the roller holes, and then the seeds are evenly scattered from the holes under the positive pressure airflow. The structure is simple, the sowing speed is fast and uniform, but the discharge The seed-carrying distance of the seed device i...

AI Technical Summary

Problems solved by technology

There are many kinds of seed metering devices, mainly divided into mechanical seed metering devices and pneumatic seed metering devices. Seed size and shape are not strictly required, and the seed injury rate is small

[0003] At present, the powerful roller seed metering device uses negative pressure to adsorb the seeds on the roller holes, and then the seeds are evenly scattered from the holes under the positive pressure airflow. The structure is simple, the sowing speed is fast and uniform, but the discharge The seed carrying distance of the seed device is too large, which is easy to cause damage and jam; when the seed is sucked, the process of taking out the seed from the seed layer has a large resistance, and it is easy to leak suction; the efficiency is not high

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