Pneumatic planter uniform low-loss gas path system, and gas distribution method

Abstract

The invention belongs to the field of agricultural machine, and relates to a pneumatic planter uniform low-loss gas path system, and a gas distribution method. According to the pneumatic planter uniform low-loss gas path system, gas flow is delivered into a gas inlet pipe (13) of a gas flow distributor (1), and, through a diameter variable joint (12), is divided into a plurality of gas flows with the same gas flow size via a plurality of gas outlet pipes (15) uniformly distributed on a distributor circular plate (11), and then is delivered into a seed outlet pipe (4) via a pneumatic seed discharging unit (3); gas flow is released gradually via gas outlets (41) uniformly arranged on the pipe body of the seed outlet pipe (4) when every certain seed height is reduced, gas flow pressure in the seed outlet pipe (4) is reduced gradually, falling speed of seeds along with gas flow is reduced obviously, and at last the seeds are discharged via a seed outlet pipe seed outlet (42). The pneumatic planter uniform low-loss gas path system is capable of maintaining supply gas pressure of a plurality of lines of seeding unit seed sowing devices to be the same effectively, reducing draught fan power requirements via reducing loss generated in gas distribution process, and reducing pneumatic seed sowing device seed discharging speed obviously via increasing pressure relief of seed discharging process.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and in particular relates to a uniform low-loss air path system and an air flow organization method for a pneumatic seeder. Background technique [0002] In recent years, pneumatic precision corn seeding technology has been widely used in my country. The pneumatic seeder can realize high-speed sowing operation and can effectively improve the operation efficiency. The sowing effect of the pneumatic corn precision seeder mainly depends on the quality of the seed meter, but whether the pneumatic seed meter can work normally depends on the air system of the seeder. For pneumatic seeders, whether the seeding performance of individual seed metering devices in each row is consistent is closely related to the uniformity of air distribution in the air system. [0003] Pneumatic seeders require fans to provide sufficient air pressure and air volume to ensure the normal operation of the seeder. Exist...

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Problems solved by technology

[0003] Pneumatic seeders require fans to provide sufficient air pressure and air volume to ensure the normal operation of the seeder. Existing pneumatic seeder fans are generally driven by tractor power output shafts or tractor hydraulic systems, and adopt straight pipe air system Airflow distribution, that is, one airflow inlet and multiple airflow outlets are set on a straight pipe. Due to the right-angle relationship between the outlet and the inlet, the airflow loss is large, and the airflow of each branch air path is uneven due to the uneven distance between the airflow inlet and the airflow inlet. Uneven distribution, resulting in large differences in the working effect of individual seed meters in each row

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