对动平衡型立式压缩机机构动力分析

发布时间：2018-05-04 18:32

本文选题：对动平衡型立式压缩机 + 曲柄连杆机构　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：随着改革开放的不断深入与国民经济的高速增长,作为化肥、石油化工、矿山、机械制造、制冷等许多工业部门广泛应用的机器之一,往复式压缩机占据着举足轻重的地位。对动平衡型立式压缩机作为往复式压缩机的一个新型分支,由于其占地面积小、效率高、振动小,被用来为船舶及发电设备提供特定压力的燃料,该型压缩机越来越受到人们重视。本文以对动平衡型立式压缩机为研究对象,对其曲柄连杆机构进行运动学与动力学分析,进而对其零部件进行有限元分析,为该型压缩机的设计提供一些参考。首先,在参阅国内外相关文献基础上,以热力学、运动学和动力学理论为基础,研究了对动平衡型立式压缩机的工作循环过程以及曲柄连杆机构的运动规律和受力状况,确定了各构件的运动规律及受载情况,为改型压缩机的动力学分析和有限元分析提供依据。其次,以Creo软件为支撑,建立压缩机的曲柄连杆机构模型,导入ADAMS软件,对曲柄连杆机构进行运动学和动力学分析,得到了活塞的位移、速度和加速度曲线,以及得到了曲柄连杆机构的气体力、总体连杆力变化曲线,并提出减小机构不平衡力的方法,然后利用仿真分析结果论证方法的可行性,为压缩机的平衡性研究提供参考。最后,结合该型压缩机的动力学分析结果,对压缩机的关键运动零部件进行有限元分析,得到了零件的等效应力图和总变形图,并找到了零件的最大应力和最大变形位置,并判定零件的设计的合理性,为压缩机零件的设计提供参考。通过上述研究得出的结论,可以为对动平衡型立式压缩机的设计提供一些有益的参考。
[Abstract]:With the deepening of reform and opening up and the rapid growth of the national economy, as one of the widely used machines in many industrial sectors, such as chemical fertilizer, petrochemical industry, mine, machinery manufacturing, refrigeration and so on, reciprocating compressor occupies a pivotal position. As a new branch of reciprocating compressor, the dynamic balancing vertical compressor is used to provide fuel for ship and power generating equipment under specific pressure because of its small area, high efficiency and small vibration. More and more attention has been paid to this type of compressor. In this paper, the kinematics and dynamics of the crank and connecting rod mechanism of the vertical compressor with dynamic balance are analyzed, and the finite element analysis of its parts is carried out, which provides some references for the design of the compressor. Firstly, based on the theories of thermodynamics, kinematics and dynamics, the working cycle process of the dynamic balancing vertical compressor and the movement law and force state of the crank and connecting rod mechanism are studied on the basis of referring to the relevant literatures at home and abroad, and based on the theory of thermodynamics, kinematics and dynamics. The motion law and loading condition of each component are determined, which provides the basis for dynamic analysis and finite element analysis of modified compressor. Secondly, based on Creo software, the crank and connecting rod mechanism model of compressor is established, and the kinematics and dynamics analysis of crank linkage mechanism is carried out by introducing ADAMS software. The displacement, velocity and acceleration curves of piston are obtained. The change curves of the gas force and the total connecting rod force of the crank and connecting rod mechanism are obtained, and the method of reducing the unbalanced force of the mechanism is put forward, and the feasibility of the method is demonstrated by the simulation analysis result, which provides a reference for the research on the balance of the compressor. Finally, combined with the dynamic analysis results of the compressor, the finite element analysis of the key moving parts of the compressor is carried out, and the equal effect and total deformation diagram of the parts are obtained, and the maximum stress and the maximum deformation position of the parts are found. The rationality of the design of the parts is determined, which provides a reference for the design of the compressor parts. The conclusions obtained from the above research can provide some useful reference for the design of dynamic balance vertical compressor.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH45

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