双缸直线电机往复泵动态特性研究
发布时间：2018-07-14 17:13
【摘要】：往复泵排出压力大、效率高,是最常见的类型泵之一。往复泵技术现已比较成熟,而且衍生出很多不同结构、不同种类的泵产品,其中包括曲柄连杆机构往复泵、凸轮机构往复泵及液压往复泵等。但是,这些传统结构的往复泵普遍存在一些缺点,如结构复杂、整体工作效率低、中间传动环节多、排量压力波动大、维修不方便,且难以实现大排量、低冲次、长冲程。直线电机是一种可以直接将电能转换为直线运动机械能的装置。随着科学技术的进步,直线电机驱动技术飞速发展,因其具有结构简单、高速、精准、低噪、低成本等优势而被广泛应用。往复泵采用直线电机作为动力端可省掉中间传动机构,简化泵的结构,提高其工作可靠性和系统效率,还可以通过改变活塞的运动规律来调节泵的流量,同时便于实现自动化控制。本课题提出了双动子直线振荡电动机驱动双缸往复泵的方案,并对这种新型双缸直线电机往复泵的动态特性进行了研究。主要开展工作如下：1.在查阅了大量国内外文献的基础上,概述了往复泵的发展研究现状和直线电机的发展及应用现状,重点简述了直线电机往复泵的研究现状；2.简述了直线电机的基本结构及工作原理,重点介绍双动子直线振荡电动机的结构及工作原理,分析了该电动机的特点及永磁体材料的选择；3.利用等效磁路法分析了双动子直线振荡电动机的电路和磁路,建立了相应的电磁数学模型,分析了电动机的振动特性,推导出电动机的轴功率及效率计算公式；4.分析了双缸直线式往复泵的结构和工作理论,研究了往复泵活塞组件和泵阀的运动规律；5.在理论研究的基础上,建立了双缸直线电机往复泵的电磁系统、水力系统及动力学系统模型,采用四阶龙格-库塔法在Matlab中进行数值求解,研究分析了该往复泵的动态特性；6.利用UVIEsim工程系统仿真软件对双缸直线式往复泵进行建模仿真,分析了电机驱动力频率对泵特性的影响,观察研究泵的流量,压力特性,证明了该直线电机往复泵的可行性,为该类型泵的设计、研发及优化提供了理论基础。
[Abstract]:Reciprocating pump is one of the most common pumps with high discharge pressure and high efficiency. The reciprocating pump technology is mature now, and many kinds of pump products are derived from different structures, including crank and connecting rod mechanism reciprocating pump, cam mechanism reciprocating pump and hydraulic reciprocating pump, etc. However, these traditional reciprocating pumps generally have some shortcomings, such as complex structure, low overall working efficiency, many intermediate transmission links, large displacement pressure fluctuation, inconvenient maintenance, and difficult to realize large displacement, low impulse, long stroke. Linear motor is a kind of device which can directly convert electrical energy into linear motion mechanical energy. With the development of science and technology, linear motor drive technology has been widely used because of its simple structure, high speed, precision, low noise and low cost. The reciprocating pump adopts linear motor as the power end to save the intermediate transmission mechanism, simplify the structure of the pump, improve its working reliability and system efficiency, and can adjust the flow rate of the pump by changing the motion law of the piston. At the same time, it is convenient to realize automatic control. In this paper, a scheme of double-cylinder reciprocating pump driven by double-cylinder linear oscillating motor is proposed, and the dynamic characteristics of this new type of double-cylinder linear motor reciprocating pump are studied. The main work is as follows: 1. On the basis of consulting a large number of literatures at home and abroad, this paper summarizes the research status quo of reciprocating pump and the development and application of linear motor, with emphasis on the research status quo of linear motor reciprocating pump. The basic structure and working principle of linear motor are briefly introduced. The structure and working principle of double action linear oscillating motor are introduced emphatically. The characteristics of the motor and the selection of permanent magnet material are analyzed. The equivalent magnetic circuit method is used to analyze the circuit and magnetic circuit of the double-action linear oscillating motor, the corresponding electromagnetic mathematical model is established, the vibration characteristic of the motor is analyzed, and the formula for calculating the axis power and efficiency of the motor is deduced. The structure and working theory of double cylinder linear reciprocating pump are analyzed, and the motion law of piston assembly and valve of reciprocating pump is studied. On the basis of theoretical research, the electromagnetic system, hydraulic system and dynamic system model of reciprocating pump with double cylinder linear motor are established. The fourth order Runge-Kutta method is used to numerically solve the problem in Matlab, and the dynamic characteristics of the reciprocating pump are studied and analyzed. Using the software of UVIEsim engineering system simulation, the double cylinder linear reciprocating pump is modeled and simulated. The influence of motor driving frequency on pump characteristics is analyzed, the flow and pressure characteristics of pump are observed and studied, and the feasibility of the linear motor reciprocating pump is proved. It provides a theoretical basis for the design, development and optimization of this type of pump.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM359.4
本文编号：2122344
[Abstract]:Reciprocating pump is one of the most common pumps with high discharge pressure and high efficiency. The reciprocating pump technology is mature now, and many kinds of pump products are derived from different structures, including crank and connecting rod mechanism reciprocating pump, cam mechanism reciprocating pump and hydraulic reciprocating pump, etc. However, these traditional reciprocating pumps generally have some shortcomings, such as complex structure, low overall working efficiency, many intermediate transmission links, large displacement pressure fluctuation, inconvenient maintenance, and difficult to realize large displacement, low impulse, long stroke. Linear motor is a kind of device which can directly convert electrical energy into linear motion mechanical energy. With the development of science and technology, linear motor drive technology has been widely used because of its simple structure, high speed, precision, low noise and low cost. The reciprocating pump adopts linear motor as the power end to save the intermediate transmission mechanism, simplify the structure of the pump, improve its working reliability and system efficiency, and can adjust the flow rate of the pump by changing the motion law of the piston. At the same time, it is convenient to realize automatic control. In this paper, a scheme of double-cylinder reciprocating pump driven by double-cylinder linear oscillating motor is proposed, and the dynamic characteristics of this new type of double-cylinder linear motor reciprocating pump are studied. The main work is as follows: 1. On the basis of consulting a large number of literatures at home and abroad, this paper summarizes the research status quo of reciprocating pump and the development and application of linear motor, with emphasis on the research status quo of linear motor reciprocating pump. The basic structure and working principle of linear motor are briefly introduced. The structure and working principle of double action linear oscillating motor are introduced emphatically. The characteristics of the motor and the selection of permanent magnet material are analyzed. The equivalent magnetic circuit method is used to analyze the circuit and magnetic circuit of the double-action linear oscillating motor, the corresponding electromagnetic mathematical model is established, the vibration characteristic of the motor is analyzed, and the formula for calculating the axis power and efficiency of the motor is deduced. The structure and working theory of double cylinder linear reciprocating pump are analyzed, and the motion law of piston assembly and valve of reciprocating pump is studied. On the basis of theoretical research, the electromagnetic system, hydraulic system and dynamic system model of reciprocating pump with double cylinder linear motor are established. The fourth order Runge-Kutta method is used to numerically solve the problem in Matlab, and the dynamic characteristics of the reciprocating pump are studied and analyzed. Using the software of UVIEsim engineering system simulation, the double cylinder linear reciprocating pump is modeled and simulated. The influence of motor driving frequency on pump characteristics is analyzed, the flow and pressure characteristics of pump are observed and studied, and the feasibility of the linear motor reciprocating pump is proved. It provides a theoretical basis for the design, development and optimization of this type of pump.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM359.4
【引证文献】
相关会议论文 前1条
1 郭亮;卢琴芬;叶云岳;;圆筒式直线振荡发电机的性能分析和设计[A];2006年全国直线电机学术年会论文集[C];2006年
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