Analysis of the Population Collision Process of Seeder Based on Linear Viscoelastic Model

ABSTRACT

According to the linear viscoelastic model, the population discrete elements under the vibration working condition of the seed tray of the seeder were assumed as rigid conditions to analyze the collision process. The dynamic characteristics among the population collision process for the vibration process of the seeder were analyzed by tracing the microcosmic motion of each seed. The following conclusions were made, including the relationship between population velocity, phase angle as well as coefficient of restitution and the vibration intensity, the relationship between the center-ofgravity position as well as volume expansion coefficient of the population after collision and the vibration period, the relationship between the center-of-gravity position as well as volume expansion coefficient of the population after collision and the vibration frequency. This provides basis for determining the vibration work parameters of the precise vibration seeder. Based on agricultural machinery design experience and air-suction vibration principles, a new test bench for precise vibration air-suction tray seed metering device was researched by electromechanical integration technology. Performance test was carried out with oilseed rapeseeds as the research object. The test results show that when the vibration frequency is 10.5Hz, the vibration amplitude is 4mm, the vacuum negative pressure value is 3kPa, the rotating velocity of the discharge plate is near 15r/min, and the pass index of the seeder will exceed 96%, which provides basis for the structural adjustment and work parameter optimization of the seeder.

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