HLPSL负载敏感性比例多路换向阀中二通压力补偿阀的特性研究

发布时间：2018-01-01 13:00

本文关键词：HLPSL负载敏感性比例多路换向阀中二通压力补偿阀的特性研究　出处：《兰州理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：二通压力补偿阀是负载敏感比例多路换向阀的关键元件,它决定了整个负载敏感比例多路换向阀的性能的好坏。对二通压力补偿阀的流场特性和动态特性进行研究,以此为依据来改进多路阀的性能,具有一定的工程实用价值。本文介绍了负载敏感比例多路换向阀的基本结构和工作原理,以及二通压力补偿阀的结构和工作原理,同时推导了三种典型的节流槽的面积计算公式,并对二通压力补偿阀的阀口面积公式进行了推导计算。以HLPSL负载敏感性比例多路换向阀中的二通压力补偿阀为研究对象,应用Pro/E软件建立其流场的三维简化模型,并运用GAMBIT对该流道模型进行网格划分。运用FLUENT流场仿真软件,对二通压力补偿阀的流道模型进行了仿真分析,获得不同参数下该阀的速度矢量分布图以及压力云图。通过对二通压力补偿阀的压力云图的分析,找出负压区域产生的主要部位,同时对二通压力补偿阀的相应位置进行结构改进,以减少负压区域的产生,建立改进结构后的二通压力补偿阀的流道模型,并对其压力分布以及速度矢量分布进行仿真分析,通过改进前后压力云图以及速度矢量分布图的对比分析,证明改进后的二通压力补偿阀能够达到消除负压区域的目的,以及较改进前的结构而言,它具有响应速度快的优势。用AMEsim软件对二通压力补偿阀进行建模,对在不同参数下的该二通压力补偿阀的响应特性进行仿真分析,找出影响该阀动态响应特性的因素,并且通过改变参数来找出使该阀响应特性较理想的一组参数。同时,对该参数下的二通压力补偿阀的阀芯速度随时间的变化曲线、位移随时间的变化曲线以及阀芯受力随时间的变化曲线进行仿真分析,以研究该二通压力补偿阀的动态性能。
[Abstract]:Two-way pressure compensation valve is a key component of load-sensitive multi-way reversing valve. It determines the performance of the whole load sensitive proportional multiplex valve. The flow field characteristics and dynamic characteristics of the two-way pressure compensation valve are studied to improve the performance of the multi-way valve. It has certain engineering practical value. This paper introduces the basic structure and working principle of load-sensitive proportional multi-way reversing valve, and the structure and working principle of two-way pressure compensation valve. At the same time, three typical formulas for calculating the area of throttling slot are derived. The formula of orifice area of two-way pressure compensation valve is deduced and calculated. Taking the two-way pressure compensation valve in HLPSL load-sensitivity proportional reversing valve as the research object, the three-dimensional simplified model of its flow field is established by using Pro/E software. The flow channel model is meshed by GAMBIT, and the flow channel model of two-way pressure compensation valve is simulated and analyzed by FLUENT flow field simulation software. The velocity vector distribution and pressure cloud diagram of the valve were obtained under different parameters. Through the analysis of the pressure cloud diagram of the two-way pressure compensation valve, the main position of the negative pressure region is found out. At the same time, the corresponding position of the two-way pressure compensation valve is improved to reduce the negative pressure area. The flow channel model of the improved two-way pressure compensation valve is established, and its pressure distribution and velocity vector distribution are simulated and analyzed, and the pressure cloud map and velocity vector distribution map before and after the improvement are compared and analyzed. It is proved that the improved two-way pressure compensation valve can eliminate the negative pressure region, and it has the advantage of fast response speed compared with the structure before the improvement. Using AMEsim software to model the two-way pressure compensation valve, the response characteristics of the two-way pressure compensation valve under different parameters are simulated and analyzed, and the factors that affect the dynamic response characteristics of the valve are found out. And by changing the parameters to find a set of parameters that make the response characteristics of the valve more ideal. At the same time, the valve core velocity changes with time for the two-way pressure compensation valve under the parameters. The change curve of displacement with time and the curve of stress of valve core with time were simulated and analyzed to study the dynamic performance of the two-way pressure compensation valve.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH134

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