活塞式压缩机主传动系统动力学优化问题研究

发布时间：2019-03-27 21:38

【摘要】：以某W型活塞式压缩机主传动系统为研究对象,即曲轴-滚动轴承系统为研究对象,利用ADAMS动力学仿真软件,研究了额定工况作用下活塞式压缩机主传动系统动力学行为。在ADAMS中分别建立刚性曲轴的压缩机主传动系统动力学仿真模型和弹性曲轴的压缩机主传动系统动力学仿真模型并求解,得到了额定工况下主轴承反力和主轴承轴颈中心径向振动响应。其次,在动力学仿真软件ADAMS中,建立计入运动副摩擦的弹性曲轴的压缩机主传动系统动力学仿真模型,研究额定工况作用下计入运动副摩擦的弹性曲轴的压缩机主传动系统动力学行为。得到了相应的动力学参数及运动副上摩擦力的变化曲线。同时也揭示出压缩机机械效率的动态变化规律。计算结果表明运动副摩擦对主轴承反力、轴承轴颈中心位移响应有显著影响。所得到的结论对提高压缩机的机械效率和动力学优化提供了前提条件。第三,建立弹性曲轴的压缩机主传动系统优化设计数学模型,该模型以两个主轴承轴颈中心径向振动响应振幅为目标函数,以压缩机气缸中心线夹角和曲轴转速为设计变量。最后利用参数化建模技术在ADAMS中建立优化模型并进行优化设计研究,得到了设计变量与目标函数之间的关系和最优解。所得到的结论对压缩机动力学设计有指导意义。第四,建立计入运动副摩擦的弹性曲轴的压缩机主传动系统动力学优化设计数学模型,该模型以压缩机机械效率为优化目标,以压缩机气缸中心线夹角和曲轴转速为设计变量。利用参数化建模技术建立ADAMS优化模型并进行优化设计,得到了设计变量与目标函数之间的关系和最优解。所得到的结论对提高压缩机机械效率打下了基础。第五,利用已有的计入运动副摩擦的弹性曲轴的压缩机主传动系统动力学优化模型,以两个主轴承轴颈中心径向振动响应振幅和机械效率为目标函数,以压缩机气缸中心线夹角和曲轴转速为设计变量进行优化研究,通过ADAMS优化模块中优化分析,获得了设计变量与目标函数之间的关系和最优解。所得到的结论对压缩机动力学设计和改进有指导意义。最后,总结了本文所作的主要工作及主要创新点,并结合压缩机主传动系统基本参数优化问题对今后的研究工作提出展望。
[Abstract]:Taking the main drive system of a W-type piston compressor as the research object, that is, the crankshaft-rolling bearing system as the research object, the dynamic behavior of the main drive system of the piston compressor under rated operating conditions is studied by using ADAMS dynamic simulation software. The dynamic simulation models of the main transmission system of the compressor with rigid crankshaft and the dynamic simulation model of the main transmission system of the compressor with elastic crankshaft are established and solved in ADAMS. The reaction force of the main bearing and the radial vibration response of the journal center of the main bearing under rated conditions are obtained. Secondly, in the dynamic simulation software ADAMS, the dynamic simulation model of the main transmission system of the compressor with elastic crankshaft including the friction of the motion pair is established. The dynamic behavior of the main transmission system of an elastic crankshaft with motion pair friction under rated conditions is studied. The corresponding dynamic parameters and the curve of the friction force on the motion pair are obtained. At the same time, it also reveals the dynamic change rule of compressor mechanical efficiency. The calculation results show that the friction of the moving pair has a significant effect on the main bearing reaction and the center displacement response of the bearing journal. The conclusion can be used to improve the mechanical efficiency and dynamic optimization of the compressor. Thirdly, a mathematical model for the optimal design of the compressor main transmission system with elastic crankshaft is established. The model takes the radial vibration response amplitude of the center of the journal of two main bearings as the objective function, and takes the angle between the center line of the compressor cylinder and the crankshaft speed as the design variables. Finally, the parametric modeling technology is used to establish the optimization model in ADAMS and the optimal design is studied. The relationship between the design variables and the objective function and the optimal solution are obtained. The conclusion can be used to guide the dynamic design of compressor. Fourthly, a mathematical model for the dynamic optimization design of the main transmission system of an elastic crankshaft is established, which takes the mechanical efficiency of the compressor as the optimization objective, and the center line angle of the compressor cylinder and the crankshaft speed as the design variables for the dynamic optimization design of the main transmission system of the compressor. The ADAMS optimization model is established by parametric modeling technology and the optimal design is carried out. The relationship between the design variables and the objective function and the optimal solution are obtained. The conclusion has laid a foundation for improving the mechanical efficiency of the compressor. Fifthly, taking the radial vibration response amplitude and mechanical efficiency of the center of the journal of two main bearings as the objective functions, the dynamic optimization model of the main transmission system of the compressor with elastic crankshaft including the friction of the motion pair is used as the objective function. Taking the center line angle of compressor cylinder and crankshaft speed as design variables, the relationship between the design variables and the objective function and the optimal solution are obtained through the optimization analysis in the ADAMS optimization module. The conclusions obtained are of guiding significance to the design and improvement of compressor dynamics. Finally, the main work and main innovations of this paper are summarized, and the future research work is prospected in the light of the optimization of the basic parameters of the main transmission system of the compressor.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH457

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