基于CFD的轴向柱塞泵的配流特性和配流盘优化设计研究

发布时间：2018-05-07 01:03

本文选题：轴向柱塞泵 + CFD　；参考：《合肥工业大学》2013年硕士论文

【摘要】：随着液压行业的迅速发展,各国都意识到液压技术在工业发展中的重要性,并且加大对相关研发的投资和支持。轴向柱塞泵是液压系统中最关键的配件之一,它主要功能是将电动机输入的机械能转化为流体介质的压力能,然后输出到液压系统中,为液压油缸等执行元件提供强大的动力。轴向柱塞泵性能的好坏直接影响液压系统的工作效率,因此对轴向柱塞泵配流特性的探究、噪声产生的机理和控制措施以及配流盘结构的优化设计是现阶段学科研究的热点。本文针对公司的斜盘式轴向柱塞泵配流特性,利用流体分析软件FLUENT进行仿真分析,得到配流过程中的压力分布、速度分布以及流体密度的变化云图。首先,建立轴向柱塞泵的数学模型。考虑在高速、高压的情况下,流体的密度和粘性对分析结果产生很大的影响,因此联立流体流动的质量守恒方程、动量守恒方程、能量守恒方程、流体的状态方程和粘性方程,建立配流过程的数学理论模型。其次,建立轴向柱塞泵的解析模型。分析轴向柱塞泵配流过程中流体的进口、出口、阻尼槽和柱塞腔等关键位置的流体流动状态,因此建立三维高雷诺数K-ε紊流模型。利用动网格技术和滑移网格技术建立轴向柱塞泵配流过程的瞬态计算模型。第三,对轴向柱塞泵的配流特性进行分析。利用仿真分析的数据,拟合出阻尼槽吸油窗口和排油窗口的阻尼系数,为阻尼系数的选取提供了理论依据。根据仿真分析得到的压力分布和速度分布云图,深入分析配流盘的配流特性。最后,对配流盘结构优化研究。针对阻尼槽、阻尼孔和孔槽结合形式的阻尼结构,分别进行模拟计算,得出最优的阻尼结构—孔槽结合的形式。
[Abstract]:With the rapid development of hydraulic industry, all countries realize the importance of hydraulic technology in industrial development, and increase investment and support in related research and development. Axial piston pump is one of the most important parts in hydraulic system. Its main function is to convert the mechanical energy input from motor into the pressure energy of fluid medium, and then output it to hydraulic system to provide powerful power for hydraulic cylinder and other actuators. The performance of axial piston pump directly affects the working efficiency of hydraulic system. Therefore, the research on the characteristics of axial piston pump flow distribution, the mechanism of noise generation and control measures, and the optimization design of the structure of the distribution disc are the hot topics in the field of study at the present stage. In this paper, according to the distribution characteristics of oblique disc axial piston pump, the fluid analysis software FLUENT is used to simulate and analyze the pressure distribution, velocity distribution and fluid density. Firstly, the mathematical model of axial piston pump is established. Considering the high speed and high pressure, the density and viscosity of the fluid have a great influence on the analysis results, so the mass conservation equation, momentum conservation equation, energy conservation equation, fluid state equation and viscous equation of simultaneous fluid flow. The mathematical model of the flow distribution process is established. Secondly, the analytical model of axial piston pump is established. In this paper, the fluid flow state at the key positions, such as inlet, outlet, damping tank and plunger cavity, in the process of axial piston pump distribution is analyzed. Therefore, a three-dimensional K- 蔚 turbulent model with high Reynolds number is established. The transient calculation model of flow distribution process of axial piston pump is established by using dynamic grid technology and sliding grid technology. Thirdly, the distribution characteristics of axial piston pump are analyzed. Using the data of simulation analysis, the damping coefficients of damping trough oil absorption window and oil drain window are fitted, which provides a theoretical basis for the selection of damping coefficient. According to the cloud diagram of pressure distribution and velocity distribution obtained by simulation analysis, the flow distribution characteristics of the distribution disc are analyzed in depth. Finally, the structure optimization of the distribution disc is studied. For the damping structure with damping slot, damping hole and hole slot, the optimal damping structure combined with hole and slot is obtained by simulation and calculation respectively.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH322

【参考文献】