The Testing Stand Design and Parameter Determination of Pneumatic Seed Metering Device of No-Till Seeder

Abstract

testing stand that is able to imitate the vibration of seeder field surface stirred up is designed to analyse the effect of vibration on the seed metering function of pneumatic seeder. The signal of vibration data is collected by tape recorder on the testing spot in testing process and then the vibration signal is analysed. A conclusion is reached based on the analysis of testing result that: the trait vibration of seeder is an approximate periodic function, which may be approximately simulated with sine exciting signal; the trait vibration frequency of seeder ranges form 0 to 68 Hz, the maximum acceleration of vibration makes 25m/s2, and the minimum excited vibration thrust of vibration exciter is 500N. A testing stand for seed metering is designed by taking these parameters as the criterion to simulate field surface excited vibration and analyse the seed metering dynamic characteristic of seed metering device.

The Influence of Seed Variety and High Seeding Speed on Pneumatic Precision Seed Metering

“…Due to the problems of low seeding speed (≤ 6 km/h), strict requirements on seed characteristics and high single-seed rate, mechanical precision seed metering devices are gradually being replaced by pneumatic seed metering devices in agricultural production (Yang et al, 2016;Woo et al, 2017). Pneumatic seed metering devices mainly include types of air blowing, air suction and air pressure (Zhao & Hu, 2012). Because of the advantages of highaccuracy, strong seed adaptability and high operation speed (Zahra & Abdanan, 2018), air suction seed metering devices are increasingly widely used in production.…”

Vibration Test and Analysis of No-Tillage Planter on the Maize Stubble Surface

“…To understand the characteristics of vibration seeder, effectively avoid or using the vibration, which is of great significance in improving the sowing quality of no tillage planter [9,10] . Therefore, air suction type no tillage seeder experimental study in maize stubble to carry out vibration test in this paper, in order to obtain the main factors affecting of vibration and vibration characteristics of the seed metering device in the sowing time, So as to effectively prevent or using vibration improve sowing quality and providing reference of indoor test.…”