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基于EDEM和3D打印成型的外槽轮排肥器排肥性能研究

Study on Fertilizer Efficiency of Outer Disc Wheel Economizer Based on EDEM and 3D Printing

摘要:

外槽轮排肥器是使用最广泛的排肥器之一,目前外槽轮排肥器结构和几何尺寸单一,无法适用不同肥料颗粒排肥需求,直接影响了排肥效果。EDEM为目前对于颗粒类仿真最有效的方法之一。采用测量和统计学方法获得肥料颗粒的三轴尺寸,以近似球体假设肥料颗粒形状,建立肥料颗粒和外槽轮排肥器的EDEM模型,通过改变槽轮的结构尺寸等,对其排肥过程进行仿真,分析外槽轮排肥器的排肥特性;3D打印成型设计槽轮,通过台架试验验证仿真结果的准确性。结果表明:凹槽半径、槽轮转速对施肥量影响较大,满足线性正相关,螺旋升角对施肥量影响不显著(P>0.05),仿真结果与试验结果的相对误差为0.85%~15.98%,平均相对误差为7.21%。本文所建立的EDEM仿真模型准确,具有实际工程应用价值。

Abstract:

Outer row of wheel fat paddle is one of the most widely used fertilizer, the current structure of the outer row wheel fat pad and a single geometric structure, can not be applied to different fertilizer particle fertilizer demand, a direct impact on the fertilizer effect. EDEM is currently one of the most effective methods for particle simulation. The three-axis size of the fertilizer particles was obtained by means of measurement and statistics. The shape of the fertilizer particles was approximated by the sphere. The EDEM model of the fertilizer particles and the outer tank runner was established. By changing the structure size of the sheave, Simulation was carried out to analyze the fertilizer discharge characteristics of the outer tank wheel economizer. The 3D printing design was designed to validate the simulation results through the bench test. The results showed that the groove radius and sheave speed had a significant effect on the amount of fertilizer application, which had a positive linear correlation. The helix angle had no significant effect on the amount of fertilizer application (P> 0.05). The relative error between simulation results and experimental results was 0.85% -15.98 %, The average relative error is 7.21%. The EDEM simulation model established in this paper is accurate and has practical engineering application value.

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