基于凸轮驱动的高压柱塞水泵研究

发布时间：2018-02-27 00:03

本文关键词： 凸轮机构高压柱塞水泵传动函数虚拟样机技术 ADAMS 有限元分析　出处：《济南大学》2012年硕士论文　论文类型：学位论文

【摘要】：针对洗井用高压柱塞水泵的方案设计与参数确定、刚柔耦合动力学模型的建立和虚拟样机仿真进行了较为系统的研究，为设计高性能的高压柱塞水泵提供了技术支持。根据洗井用高压水泵的工作条件，分析研究了其面临的腐蚀、内泄漏、磨损等技术问题，确定了轴向柱塞式的主体结构型式，采用了凸轮驱动八个单作用缸对置式布置的技术方案。针对工程中常用的两种凸轮传动的运动规律进行了运动学仿真，得出了盖特曼函数与变余弦函数对应的柱塞运动位移、速度、加速度曲线。盖特曼和变余弦两种传动函数对应的柱塞运动位移、速度的变化规律相似，但是，两种传动函数对应的柱塞运动加速度的变化规律存在本质区别，变余弦函数对应的最大加速度略小，但在运动开始与结束阶段存在突变，而盖特曼函数整个运动阶段加速度连续无突变，运动平稳，理论上没有冲击。盖特曼传动函数适用于大流量重负载的洗井用高压柱塞水泵。导出了采用盖特曼函数作为运动规律的槽凸轮轮廓曲线的坐标方程，，并给出了槽凸轮轮廓曲线的设计过程。结合Pro/E、ANSYS与ADAMS建立了高压柱塞水泵的刚柔耦合动力学模型，并进行了动力学仿真分析。建立了洗井用高压柱塞水泵的虚拟样机模型，按照实际工作状况设置仿真参数，验证了虚拟样机模型的正确性。在ADAMS中对高压柱塞水泵的影响因素进行仿真分析，并总结了产生影响的规律。在ANSYS中对凸轮轴进行有限元分析，得到高压柱塞水泵柱塞受到最大压力时凸轮轴的应力与应变分布云图，验证了其满足强度要求。通过分析高压柱塞水泵柱塞的运动速度，总结出高压柱塞水泵流量恒定的条件，验证了其输出的流量恒定。解决了高压柱塞水泵流量不稳定、压力波动大的缺点，改善了高压柱塞水泵的运动学与动力学特性。
[Abstract]:The scheme design and parameter determination of high pressure plunger pump for well washing, the establishment of rigid-flexible coupling dynamic model and the simulation of virtual prototype are studied systematically, which provides technical support for the design of high performance high pressure plunger pump. According to the working conditions of high pressure water pump for well washing, the technical problems such as corrosion, internal leakage and wear are analyzed and studied, and the main structure type of axial plunger type is determined. The technical scheme of cam driving eight single acting cylinders is adopted. Based on the kinematics simulation of two kinds of cam drives, the displacement and velocity of plunger corresponding to the Gatman function and the variable cosine function are obtained. Acceleration curve. The displacement and velocity of plunger movement corresponding to the transmission function of Gettmann and variable cosine are similar, but there are essential differences between them. The maximum acceleration corresponding to the variable cosine function is a little small, but there is a sudden change in the beginning and the end of the motion, while the acceleration of the Gettmann function in the whole motion phase has no mutation continuously, and the motion is stable. There is no shock in theory. The Gatman transmission function is suitable for high pressure plunger pumps for large flow and heavy loads. The coordinate equation of groove-cam contour curve using Guytmann function as motion law is derived, and the design process of groove-cam contour curve is given. The rigid-flexible coupling dynamic model of high-pressure plunger pump is established by using Pro-Eansys and ADAMS. Dynamics simulation analysis is also carried out. The virtual prototype model of high pressure plunger pump for well washing is established. The simulation parameters are set up according to the actual working conditions, and the correctness of the virtual prototype model is verified. The influence factors of high pressure plunger pump are simulated and analyzed in ADAMS. The finite element analysis of camshaft is carried out in ANSYS, and the distribution of stress and strain of camshaft is obtained when the piston of high pressure plunger is subjected to the maximum pressure. By analyzing the moving speed of the plunger of the high pressure plunger pump, the condition of constant flow rate of the high pressure plunger pump is summarized, and the constant flow rate of its output is verified, and the unstable flow rate of the high pressure plunger pump is solved. The disadvantage of high pressure fluctuation improves the kinematics and dynamics of high pressure plunger pump.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH322

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