变形椭圆齿轮式扎穴机构设计与工作参数试验优化

发布时间：2019-06-18 20:29

【摘要】：针对深施型液态施肥机扎穴机构多参数下动力学性能差等问题,探索多工作参数下的变形椭圆齿轮式扎穴机构动力学变化规律,通过建立变形椭圆齿轮行星轮系的节曲线方程,采用Visual Basic 6.0语言,编写了变形椭圆齿轮式扎穴机构运动学仿真与优化软件,调节变形椭圆齿轮的长半轴长度、变形椭圆齿轮偏心率与变形椭圆齿轮变形系数等相关参数,优化并得到一组机构较优参数。搭建了扎穴机构动力学特性测试试验台,进行动力学特性试验。采用旋转中心复合试验设计方案,以行星架转速和土槽车前进速度为试验影响因素,以太阳轮轴所受扭矩和喷肥针入土时受到的拉压力为试验影响指标。在试验台上利用扭矩传感器、信号采集仪和DASP-10处理软件,测得太阳轮轴扭矩和喷肥针入土时受到的拉压力,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。试验结果表明,当行星架转速64.4 r/min,前进速度0.61 m/s时,太阳轮轴扭矩为5.05 N·m,喷肥针受到的拉压力为20.03 N,此时机构动力学性能最优。应用此参数组合进行测试验证,验证了其合理性。该研究结果可保证扎穴机构在多工作参数下工作时,机具具有良好的扎穴性能。
[Abstract]:In order to solve the problem of poor dynamic performance of deep liquid fertilizer machine under multi-parameters, the dynamic variation law of deformed elliptical gear hole mechanism under multi-working parameters is explored. By establishing the pitch curve equation of deformed elliptical gear planet gear train, using Visual Basic 6.0 language, the kinematic simulation and optimization software of deformed elliptical gear hole mechanism is compiled to adjust the length of long half shaft of deformed elliptical gear. The eccentricity of deformed elliptical gear is related to the deformation coefficient of deformed elliptical gear, and a set of optimal parameters of the mechanism are optimized and obtained. A test bench for dynamic characteristics of hole-piercing mechanism was set up and the dynamic characteristics test was carried out. The rotating center composite test design scheme is adopted, the rotating speed of the planet frame and the forward speed of the earth tank car are taken as the experimental influencing factors, and the torque of the solar wheel shaft and the tensile pressure of the fertilizer injection needle when entering the soil are taken as the experimental influencing indexes. The torque sensor, signal collector and DASP-10 processing software are used to measure the torque of solar wheel shaft and the tension pressure of fertilizer injection needle when it enters the soil. The relationship model and response surface diagram between the influencing factors and influencing indexes are established, and the test data are analyzed by Design-Expert 8.0.10 software. The experimental results show that when the speed of the planet frame is 64.4 r / min and the forward speed is 0.61 m / s, the torque of the solar wheel shaft is 5.05 N 路m and the tensile pressure of the fertilizer injection needle is 20.03 N, and the dynamic performance of the mechanism is the best. This parameter combination is used to test and verify its rationality. The results of this study can ensure that the hole-piercing mechanism has good hole-piercing performance when it works under multiple working parameters.
【作者单位】：东北农业大学工程学院;黑龙江八一农垦大学工程学院;黑龙江工程学院机电工程学院;
【基金】：国家自然科学基金项目(51675093)
【分类号】：S224.21

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