插装溢流阀动静态性能分析及结构优化
发布时间：2018-09-19 07:37
【摘要】：二通插装阀有流动液阻小、动态响应迅速、通油能力大、工作性能可靠、结构简单、易于集成化生产等特点,是大吨位工程机械液压系统中的关键元件之一。当今世界工程机械领域对大型工程机械液压系统的动作频率、排量、控制精度和工作压力等工作性能有了更高的要求,对液压系统和元件的工作性能使用数值仿真方法进行计算机模拟实验,将成为工程机械设计中必不可少的步骤。国内工程机械液压元件的研究正处于起步阶段,如高压齿轮泵、控制阀等液压元件的特性研究等许多基础性的工作有待进一步深化,而大通径二通插装阀的动静态特性在这些基础性研究工作的范围内。 论文以振动压路机振动阀中的插装溢流阀系统为研究对象,根据流体力学理论计算振动溢流阀的静态性能,利用流体仿真软件FLUENT进行数值仿真模拟实验,并辅以正交实验法进行试验数据处理,根据仿真实验得出插装溢流阀内部流道的流场分布,从而确定影响插装溢流阀液阻的主要因素,根据FLUENT与正交试验得出的优化方案。 建立阀芯运动方程、阀腔连续性方程、阻尼孔连续性方程,并通过建立AMESIM模型,对插装溢流阀的动态性能进行仿真优化。本文探讨了主阀阻尼孔直径、前腔体积、主阀腔体积、盖板阻尼孔直径、盖板腔体积、先导阀阻尼直径、先导进口腔的体积等参数对插装溢流阀动态特性的影响。 通过本文工作,为利用仿真试验与物理试验相结合的方法,进行大吨位工程机械液压元件特性等基础性的研究工作,提供了可借鉴的研究方法和思路。
[Abstract]:Two-way cartridge valve is one of the key components in hydraulic system of large-tonnage construction machinery because of its characteristics such as small flow resistance, rapid dynamic response, large oil flow capacity, reliable working performance, simple structure and easy integrated production. Nowadays, in the field of construction machinery, the working performance of hydraulic system of large-scale construction machinery is required to be higher, such as the working frequency, displacement, control precision and working pressure, etc. Using numerical simulation method to simulate the working performance of hydraulic system and components will be an indispensable step in the design of construction machinery. The research of hydraulic components of construction machinery in China is in its infancy, such as the characteristic study of hydraulic components such as high-pressure gear pumps, control valves, and so on, and many basic works need to be further deepened. The dynamic and dynamic characteristics of the two way cartridge valve with Chase diameter are within the scope of these basic research work. Based on the theory of fluid mechanics, the static performance of vibration relief valve is calculated, and the numerical simulation experiment is carried out by using fluid simulation software FLUENT. The experimental data were processed by orthogonal experiment method, and the flow field distribution of the internal channel of the plug relief valve was obtained according to the simulation experiment. The main factors affecting the liquid resistance of the plug relief valve were determined, and the optimized scheme was obtained according to the FLUENT and orthogonal test. The motion equation of valve core, the continuity equation of valve cavity and the continuity equation of damping hole are established, and the dynamic performance of plug relief valve is simulated and optimized by establishing AMESIM model. In this paper, the influence of the main valve damping hole diameter, the front cavity volume, the main valve cavity volume, the cover plate damping hole diameter, the cover plate cavity volume, the pilot valve damping diameter and the leading mouth volume on the dynamic characteristics of the inserted relief valve are discussed. Through the work of this paper, the research methods and ideas can be used for reference for the basic research work such as the characteristics of hydraulic components of large tonnage construction machinery by using the method of combining simulation test with physical test.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52
本文编号：2249469
[Abstract]:Two-way cartridge valve is one of the key components in hydraulic system of large-tonnage construction machinery because of its characteristics such as small flow resistance, rapid dynamic response, large oil flow capacity, reliable working performance, simple structure and easy integrated production. Nowadays, in the field of construction machinery, the working performance of hydraulic system of large-scale construction machinery is required to be higher, such as the working frequency, displacement, control precision and working pressure, etc. Using numerical simulation method to simulate the working performance of hydraulic system and components will be an indispensable step in the design of construction machinery. The research of hydraulic components of construction machinery in China is in its infancy, such as the characteristic study of hydraulic components such as high-pressure gear pumps, control valves, and so on, and many basic works need to be further deepened. The dynamic and dynamic characteristics of the two way cartridge valve with Chase diameter are within the scope of these basic research work. Based on the theory of fluid mechanics, the static performance of vibration relief valve is calculated, and the numerical simulation experiment is carried out by using fluid simulation software FLUENT. The experimental data were processed by orthogonal experiment method, and the flow field distribution of the internal channel of the plug relief valve was obtained according to the simulation experiment. The main factors affecting the liquid resistance of the plug relief valve were determined, and the optimized scheme was obtained according to the FLUENT and orthogonal test. The motion equation of valve core, the continuity equation of valve cavity and the continuity equation of damping hole are established, and the dynamic performance of plug relief valve is simulated and optimized by establishing AMESIM model. In this paper, the influence of the main valve damping hole diameter, the front cavity volume, the main valve cavity volume, the cover plate damping hole diameter, the cover plate cavity volume, the pilot valve damping diameter and the leading mouth volume on the dynamic characteristics of the inserted relief valve are discussed. Through the work of this paper, the research methods and ideas can be used for reference for the basic research work such as the characteristics of hydraulic components of large tonnage construction machinery by using the method of combining simulation test with physical test.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52
【引证文献】
相关硕士学位论文 前1条
1 洪威;无压力超调溢流阀设计与特性研究[D];西南交通大学;2013年
，本文编号：2249469
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