电液比例插装阀数值模拟分析及可视化实验研究
发布时间：2019-01-25 10:44
【摘要】：随着国民经济的快速发展,我国钢铁、能源、航空航天、国防、船舶等行业迅速崛起,这些行业对于重型机械装备的要求越来越高。电液比例插装阀作为大中型液压系统中关键控制元件之一,其性能直接决定了液压系统的动态品质和稳态特性。但国内的电液比例插装阀主要依赖进口,为了开发具有国内自主知识产权的电液比例插装阀,本文从电液比例插装阀的关键部件阀芯和阀套入手,利用仿真和实验手段,对不同结构的阀芯和阀套进行研究,为电液比例插装阀的国产化研究奠定了理论基础。 首先通过理论计算的方法,计算插装阀不同阀芯节流孔结构时插装阀的过流面积,从而得到插装阀的理论流量,为插装阀的结构优化奠定理论基础。建立DN80插装阀的物理模型,采用Gambit软件对建立好的流体流动区域的模型进行网格划分,利用FLUENT软件对流体流动区域进行数值模拟,从而得到整个流体流动区域的流场。 通过数值模拟方法得到不同阀芯节流孔结构和不同阀套通孔结构下的整个插装阀流动区域的流场,探讨了插装阀在不同结构下的流量特性、流场的压力和速度分布特征以及阀芯和阀套的受力情况,揭示了不同阀芯节流孔结构和不同阀套通孔结构对流量特性的影响规律,阐明了不同阀芯和阀套结构时插装阀流场的优缺点。最后,基于相似原理对插装阀进行相似理论分析,得到相似模型,并对相似模型进行了可视化实验研究,验证了仿真模拟结果的正确性,为插装阀的优化及研发提供了技术支撑。
[Abstract]:With the rapid development of the national economy, China's steel, energy, aerospace, national defense, shipping and other industries are rapidly rising, these industries for heavy machinery and equipment more and more demanding. As one of the key control components in large and medium hydraulic system, the performance of electro-hydraulic proportional valve directly determines the dynamic quality and steady-state characteristic of hydraulic system. In order to develop the electro-hydraulic proportional cartridge valve with independent intellectual property rights in China, this paper starts with the valve core and valve sleeve, which is the key component of the electro-hydraulic proportional plug valve, and makes use of simulation and experimental means. The study of valve core and valve sleeve with different structures lays a theoretical foundation for the localization of electro-hydraulic proportional valve. Firstly, through the theoretical calculation method, the overflow area of the cartridge valve with different valve core orifice structure is calculated, and the theoretical flow rate of the cartridge valve is obtained, which lays a theoretical foundation for the structural optimization of the cartridge valve. The physical model of DN80 cartridge valve is established, the model of the established fluid flow region is meshed by Gambit software, and the flow field of the whole fluid flow region is obtained by numerical simulation of the fluid flow region with FLUENT software. The flow field of the whole valve flow region under different valve core throttle orifice structure and different valve sleeve through hole structure is obtained by numerical simulation, and the flow characteristics of cartridge valve under different structure are discussed. The pressure and velocity distribution characteristics of the flow field and the stress situation of the valve core and valve sleeve reveal the influence of different orifice structure of the valve core and the through hole structure of the valve sleeve on the flow characteristics. The advantages and disadvantages of cartridge valve flow field with different valve core and valve sleeve structure are expounded. Finally, based on the similarity theory, the similar model is obtained, and the simulation results are verified by visual experiment. It provides technical support for the optimization and R & D of cartridge valve.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52
本文编号：2415059
[Abstract]:With the rapid development of the national economy, China's steel, energy, aerospace, national defense, shipping and other industries are rapidly rising, these industries for heavy machinery and equipment more and more demanding. As one of the key control components in large and medium hydraulic system, the performance of electro-hydraulic proportional valve directly determines the dynamic quality and steady-state characteristic of hydraulic system. In order to develop the electro-hydraulic proportional cartridge valve with independent intellectual property rights in China, this paper starts with the valve core and valve sleeve, which is the key component of the electro-hydraulic proportional plug valve, and makes use of simulation and experimental means. The study of valve core and valve sleeve with different structures lays a theoretical foundation for the localization of electro-hydraulic proportional valve. Firstly, through the theoretical calculation method, the overflow area of the cartridge valve with different valve core orifice structure is calculated, and the theoretical flow rate of the cartridge valve is obtained, which lays a theoretical foundation for the structural optimization of the cartridge valve. The physical model of DN80 cartridge valve is established, the model of the established fluid flow region is meshed by Gambit software, and the flow field of the whole fluid flow region is obtained by numerical simulation of the fluid flow region with FLUENT software. The flow field of the whole valve flow region under different valve core throttle orifice structure and different valve sleeve through hole structure is obtained by numerical simulation, and the flow characteristics of cartridge valve under different structure are discussed. The pressure and velocity distribution characteristics of the flow field and the stress situation of the valve core and valve sleeve reveal the influence of different orifice structure of the valve core and the through hole structure of the valve sleeve on the flow characteristics. The advantages and disadvantages of cartridge valve flow field with different valve core and valve sleeve structure are expounded. Finally, based on the similarity theory, the similar model is obtained, and the simulation results are verified by visual experiment. It provides technical support for the optimization and R & D of cartridge valve.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52
【引证文献】
相关博士学位论文 前3条
1 彭志威;基于计算流体力学的虹吸式流道形状优化设计[D];湖南大学;2009年
2 梁桂华;柴油机缸内流场的PIV技术应用研究及数值模拟[D];大连理工大学;2009年
3 姚静;锻造油压机液压控制系统的关键技术研究[D];燕山大学;2009年
相关硕士学位论文 前1条
1 曾清平;新型高频振动阀的设计与研究[D];中北大学;2013年
，本文编号：2415059
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