【作者】 王艳珍；

【导师】 柯坚；

【作者基本信息】 西南交通大学 ， 机械电子工程， 2003， 硕士

【摘要】 水压驱动技术作为人类可持续发展的一项环保、节能新技术，将代替现已成熟的油压驱动技术。在水压控制系统中，滑阀和锥阀是构成水压控制系统不可缺少的元件，同时水压阀也是产生能耗的一类主要元件，因此水压阀的性能对整个系统的性能起着至关重要的作用。由于水压阀是通过控制流体流动来操作系统的，阀的压降也来自于流体流经阀道时的能量损失，因此阀内的流体流动状态就成为决定阀操作性能最为重要的因素。 水压阀中的液压冲击、振动、噪声以及水压阀中的气蚀是研制水压阀存在的主要难题，而有限体积数值计算方法又被证实是一种可行而有效的流场计算法，因此应用有限体积法对水压阀阀道内流场进行数值模拟和可视化研究，是非常有意义，也是非常重要的。 论文主要包含三部分的内容：水压阀稳态模型和瞬态模型的建立；水压阀内流场过流特性的研究；作用于水压阀阀芯及阀体上的力特性分析。通过对水压阀模型的CFD稳态和瞬态解析，可以得到水压阀内流场的速度分布、压力分布及能量分布，据此定性分析流道结构(速度、压力、流动的分离与再附壁，旋涡的产生与消失等)与能量损失、负压分布等的关系，从而为设计出高效率、低能耗、低噪声的水压阀提供理论依据。同时CFD解析也可以得到不同启闭速度下阀腔内的动态压力，在此基础上计算出作用于水压阀阀芯的稳态和瞬态轴向液动力，对精确计算阀芯驱动力具有重要的参考价值和指导意义。更多还原

【Abstract】 Water hydraulics, as a kind of new technology, is widely cared because of its environment-protections and energy-savings. Water hydraulics will take place of oil hydraulics step by step. Spool valves and poppet valves are not only the key components but also the main components for energy loss, so the property of water hydraulic valves is significant for water hydraulic control system. Because the operation in water hydraulic valves is controlled by flow fluid and the pressure drop results from energy loss of flow fluid past valve channel, the flow state of fluid in valves becomes the most important factor for the operational property of valves.Hydraulic pound, vibrate, noise and cavitation are the main difficult problems in water hydraulic valves, and finite element numerical analysis is proved to be an effective computational method, so numerical simulation and visualizing research on the flow field in water hydraulic valves by applying finite volume method is very important.Here are three parts in this thesis: Building steady state model and transient model for water hydraulic valves. Research on the property of flow field inside water hydraulic valves. Analysis of the force on water hydraulic valves. After simulating the model of water hydraulic valves, the velocity distribution, pressure distribution, energy distribution can be obtained and relations between the valve channel and the energy loss, the negative pressure distribution can be analyzed, which offers the theory foundation for designing water hydraulic valves with the high efficiency, low energy loss and low noise. At the same time, the pressure of dynamic state in different opening and closing velocities can be gained, on the basis of results the axial hydraulic force and the fluid force can be calculated, which offers reference and guide foundations for accurately calculating the drive force on water hydraulic valves.更多还原