径向往复泵动力端部件的研究

发布时间：2018-07-16 23:33

【摘要】：随着科学技术的不断高速发展,现代设备的自动化水平越来越高,对液压泵的性能要求也越来越高。本课题致力于研制开发一种新型的四缸径向柱塞往复泵,泵的动力端采用了单拐双滑机构取代传统的凸轮机构和曲柄连杆机构,具有设计新颖,结构简单紧凑,比传统泵体积小,噪音低,节能,外形美观,运转平稳,性能可靠,单人拆装维修方便,使用范围广等一系列特点。本文以径向柱塞往复泵的动力端为研究对象,探讨了传统凸轮机构往复泵的结构原理以及不足之处,在此基础上设计出了一种新型的四缸径向柱塞往复泵的工作原理以及结构方案,并进一步对动力端的关键零部件进行分析研究和结构改进。利用三维建模软件Pro/E建立了泵体的三维模型,为进一步的仿真分析和结构改进奠定了基础。建立了泵的动力端虚拟样机,利用Admas软件对泵的动力端进行仿真分析,方便快速的得到了动力端各零部件的运动学和动力学参数,直观地展现了四缸径向柱塞往复泵的运动特性。动力学仿真分析的结果,为四缸径向柱塞往复泵的进一步设计和改进提供了可靠的依据。对动力端关键零部件偏心轴体进行了结构尺寸设计以及动平衡设计,并对轴体进行有限元分析,验算偏心轴体的强度。研究了滑板上承受的扭矩和由于承受扭矩而产生的滑板上的载荷分布不均匀的状况,将原径向对称布置的四个柱塞往复体的柱塞中心线相对于主轴对称线绕主轴旋转的反方向依次偏置一定距离,极大的减小了滑板上承受的扭矩和滑板上由于承受扭矩而产生的弯曲应力,改善了滑板上所受载荷不均匀分布的状况,有效的减小了滑板的磨损。本文的创新之处在于： 1、新型柱塞往复泵的动力端采用单拐双滑机构取代传统的凸轮机构和曲柄连杆机构,既具有曲柄连杆机构的承载能力,又具有凸轮机构的简单结构形式。 2、提出了将原径向对称布置的四个柱塞往复体的柱塞中心线相对于主轴对称线绕主轴旋转的反方向依次偏置一定距离的设计方案,极大的减小了滑板上承受的扭矩和滑板上由于承受扭矩而产生的载荷不均匀分布的状况,有效的提高了滑板摩擦副的可靠性。
[Abstract]:With the rapid development of science and technology, the automation level of modern equipment is becoming higher and higher. This paper is devoted to the development of a new four-cylinder radial plunger reciprocating pump. The power end of the pump is designed with a new design and simple and compact structure, which replaces the traditional cam mechanism and crank linkage mechanism by using a single crank and double slip mechanism in the power end of the pump. Compared with the traditional pump, it has a series of characteristics such as small volume, low noise, energy saving, beautiful appearance, stable operation, reliable performance, convenient single disassembly and maintenance, wide range of use, etc. Taking the power end of radial plunger reciprocating pump as the research object, this paper discusses the structure principle and deficiency of the traditional cam mechanism reciprocating pump. On this basis, a new type of four-cylinder radial plunger reciprocating pump is designed and its working principle and structure scheme are designed, and the key parts of the power end are analyzed and studied and the structure is improved. The 3D model of the pump body is established by using the 3D modeling software Prop / E, which lays a foundation for further simulation analysis and structural improvement. The virtual prototype of the power end of the pump is established, and the kinematics and dynamic parameters of the parts of the power end are obtained conveniently and quickly by using the Admas software to simulate the power end of the pump. The motion characteristics of four-cylinder radial plunger reciprocating pump are displayed intuitively. The result of dynamic simulation provides a reliable basis for the further design and improvement of four cylinder radial plunger reciprocating pump. The structural dimension design and dynamic balance design of the eccentric shaft of the key parts at the power end are carried out. The strength of the eccentric shaft is checked and calculated by finite element analysis of the shaft body. The uneven distribution of the load on the slide and the load on the slide caused by the torque is studied. The center line of the plunger of the four plunger reciprocating bodies arranged in the original radial symmetry is biased by a certain distance relative to the reverse direction of the main axisymmetric line rotating around the main axis. It greatly reduces the torque on the skateboard and the bending stress caused by the torsion on the skateboard, improves the uneven distribution of the load on the skateboard, and effectively reduces the wear of the skateboard. The innovations of this paper are as follows: 1. The new plunger reciprocating pump adopts single and double slip mechanism to replace the traditional cam mechanism and crank linkage mechanism, which has the bearing capacity of crank and connecting rod mechanism. It also has the simple structure form of cam mechanism. 2. This paper presents a design scheme that the center line of the piston of the four piston reciprocating bodies arranged in the original radial symmetry is offset by a certain distance relative to the reverse direction of the rotation of the main axisymmetric line around the main axis of the reciprocating body. It greatly reduces the torque on the skateboard and the uneven distribution of the load caused by the torque on the skateboard, and effectively improves the reliability of the friction pair of the skateboard.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH32

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