Design and Experiment of Double-guide Sliding Deflection System for No-till Wheat Seeder
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    Abstract:

    Aiming at the problems of easy clogging and poor passivity of the furrow opener in the operation of wheat no-till planter in annual maturing area of corn in North China, the method of precise stubble avoidance on the rows was proposed, and a wheat no-till seeder double guide sliding type deflection adjusting system was designed. Through theoretical analysis, the equations of lower suspension arm moment balance, offset distance and hydraulic cylinder force balance of the deflection traverse mechanism were constructed, and the key factors affecting the lifting performance and deflection performance of the deflection traverse mechanism were determined. The performance of the deflection control system was verified by using the critical proportionality method to adjust the parameters of PID control, and the overshoot amount was less than 5%, the average response steady-state error was less than 3mm, and the moving response time was 2.8s. The field test results showed that when the amount of straw cover between rows and the operating speed were gradually increased, the longitudinal adjustment distance of the wheat no-till planter and the operating speed of no-till planter was less than or equal to 1.4m/s and the straw cover between rows was less than or equal to 1.5kg/m2, the stubble avoidance rate was greater than or equal to 90%, the longitudinal adjustment distance was less than or equal to 2.5m, and the coefficient of variation of wheat sowing uniformity was less than or equal to 26.75%, which can meet the requirements of no-till planter for adjusting deflection operation. It can meet the requirements of wheat no-till planter and provide reference for the design of precise stubble avoidance device for wheat no-till seeding.

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History
  • Received:September 20,2022
  • Revised:
  • Adopted:
  • Online: October 16,2022
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