活塞连杆一体型压缩机工作特性研究

发布时间：2018-02-22 09:02

本文关键词： 活塞连杆一体型压缩机结构热力计算动力计算舌簧阀有限元平面运动活塞压缩机　出处：《广西大学》2012年硕士论文　论文类型：学位论文

【摘要】：活塞连杆一体型压缩机作为直联便携式往复活塞压缩机的重要组成部分,广泛用于家庭装饰、喷漆、美妆彩绘等领域。本文主要做了如下工作： (1)运用AutoCAD绘制活塞连杆一体型压缩机的零件图和装配图,并使用工程软件Pro/E获得三维图。辅以三维结构图,系统介绍压缩机曲柄连杆机构、气缸组件、压缩机机壳组件等的结构和装配关系。 (2)对活塞连杆一体型压缩机进行运动分析,经简化后得到活塞体轴向位移、径向位移和连杆体转角表达式,并应用MATLAB软件对比分析活塞连杆一体型压缩机轴向、径向运动学关系。 (3)使用传统热力学计算方法,得到活塞连杆一体型压缩机的热力学计算公式。它们能够计算气缸直径、计算轴功率和选取驱动机。对单缸活塞连杆一体型压缩机受力分析,设计平衡重和求取飞轮矩,采用Visual Basic程序设计软件编写飞轮矩计算程序。 (4)采用四阶龙格-库塔方法,求解气体流动微分方程和舌簧阀片运动微分方程构成的方程组,并绘制舌簧阀特征升程处位移图、速度图,然后按绝热过程计算压缩和膨胀过程,最后绘制P-V图,用矩形法求取压缩机指示功率。上述过程运用Visual Basic编程实现。 (5)运用大型非线性有限元软件ABAQUS对排气舌簧阀的整个工作过程进行动力学有限元分析,包括前处理、加载求解和后处理,获得舌簧阀特征升程处的阀片位移图,与数值求解的运动规律基本吻合。得到最大应力处为阀片根部,升程限制器有轻微振动,吸气过程阀片头部下凹变形而产生的应力也较大。 (6)介绍活塞连杆一体型压缩机的改进结构：平面运动活塞压缩机,阐述该机型的工作原理,运用收敛喷管模型简单分析了压缩机的泄漏,而且提出改善压缩机泄漏和减少摩擦磨损的结构型式。
[Abstract]:As an important part of the direct connection portable reciprocating piston compressor, the piston and connecting rod integrated compressor is widely used in the fields of family decoration, paint spray, beauty painting and so on. The main work of this paper is as follows:. AutoCAD is used to draw the parts and assembly drawings of the piston and connecting rod compressor, and the 3D drawing is obtained by using the engineering software Pro/E. In addition, the crank and connecting rod mechanism and the cylinder assembly of the compressor are introduced systematically with the help of the three-dimensional structure diagram. The structure and assembly relationship of compressor housing components. The axial displacement, radial displacement and rotation angle of piston body are obtained by analyzing the motion of piston and connecting rod integral compressor, and the axial direction of piston and connecting rod integral compressor is analyzed by MATLAB software. Radial kinematics. Using the traditional thermodynamic calculation method, the thermodynamic calculation formulas of the piston and connecting rod integral compressor are obtained. They can calculate the cylinder diameter, calculate the shaft power and select the driving machine. The balance weight and the moment of flywheel are designed, and the calculation program of flywheel moment is programmed by Visual Basic program. The fourth order Runge-Kutta method is used to solve the equations of gas flow differential equation and tongue spring valve motion differential equation. The displacement diagram and velocity diagram of the characteristic lift of tongue spring valve are drawn, and then the compression and expansion processes are calculated according to the adiabatic process. Finally, P-V diagram is drawn, and the indicated power of compressor is obtained by rectangular method. The process is realized by Visual Basic programming. 5) the dynamic finite element analysis of the whole working process of the exhaust tongue spring valve is carried out by using the large-scale nonlinear finite element software ABAQUS, including pre-processing, loading solution and post-processing, and the displacement diagram of the valve plate at the characteristic lift of the tongue spring valve is obtained. It is found that the maximum stress is at the root of the valve plate, the lift limiter has slight vibration, and the stress caused by the concave deformation of the valve head in the suction process is larger. This paper introduces the improved structure of the piston and connecting rod integrated compressor: the planar moving piston compressor, expounds the working principle of this type of compressor, and analyzes the leakage of the compressor by using the convergent nozzle model. Moreover, the structure type of improving compressor leakage and reducing friction and wear is put forward.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH457

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