Authors

Abstract

In response to the poor fertilization performance of the deep application mechanism of the deep application liquid fertilizer applicator under multiple parameters, the fertilization variation of the crank rocker deep application mechanism under multiple working parameters is explored. To obtain the fertilization variation of the crank rocker deep application mechanism, a fertilization performance test bench for the crank rocker deep application mechanism is developed. On this test bench, the crank speed, liquid pump pressure, and spray hole diameter are used as experimental factors, and fertilizer application rate is used as experimental indicators. A composite design scheme of rotation center is adopted to establish a relationship model and response surface diagram between experimental influencing factors and influencing indicators. Design Expert 8.0.10 software is used to analyze and optimize the experimental data. The optimal results are a crank speed of 145.80 r/min, a liquid pump pressure of 0.25 MPa, a spray hole diameter of 3.02 mm, a fertilizer application rate of 28.6 mL, and a fertilizer loss rate of 1.9%. At this time, the fertilization performance of the mechanism is optimal. This parameter combination is applied for testing and verification to verify its rationality. The results can ensure that the crank rocker deep application mechanism has good working performance when working under multiple parameters, providing theoretical reference for designing deep application liquid fertilizer machines with simple structure and optimal fertilization performance.

Abstract in Chinese

针对深施型液态施肥机的深施机构多参数下施肥性能差等问题，探索了多工作参数下的曲柄摇杆式深施机构施肥变化规律，为了得到曲柄摇杆式深施机构的施肥变化规律，研制了曲柄摇杆式深施机构的施肥性能试验台。在该试验台上以曲柄转速、液泵压力和喷孔直径为试验因素，施肥量为试验指标，采用旋转中心复合设计方案，建立试验影响因素和影响指标的关系模型及响应曲面图，并运用Design-Expert 8.0.10软件对试验数据进行分析和优化，最优结果：曲柄转速为145.80 r/min、液泵压力为0.25 MPa、喷孔直径3.02 mm、施肥量为28.6 mL和施肥损失率为1.9%，此时机构施肥性能最优，应用此参数组合进行测试验证，验证了其合理性。该研究结果可保证曲柄摇杆式深施机构在多参数下工作时，机具具有良好的工作性能，为设计结构简单且具有较好施肥性能的深施型液态施肥机提供理论参考。