液压长管道阀控缸系统压力与流量传输特性研究

发布时间：2018-06-13 00:03

本文选题：长管道 + 压力比幅频特性　；参考：《中南大学》2012年硕士论文

【摘要】：本文以长管道液压阀控缸系统为研究对象,从理论、仿真、实验三个层面研究系统压力与流量时域与频域传输特性,主要从以下几个方面进行研究： 1.流体在管道内传输时,考虑流体线性摩擦特性,建立管道入口与出口的压力比传输幅频特性模型,通过Matlab编程求解管道内径、长度与流体参数对管道压力传输的影响规律； 2、利用AMESim软件搭建长管道液压阀控缸系统的仿真模型,通过HCD库搭建比例调速阀与比例溢流阀模型,并与所选取阀的样本相核对,得出能与样本吻合的阀参数设置,总结了AMESim软件中管道子模型选取的流程,得出考虑管道特性时不同流体与管道参数对长管道阀控缸系统压力与流量传输特性； 3、构建了液压长管道实验台。结构上创新设计了一种大推力可变负载的对顶油缸装置；研制了一种多组合液压输流长管道装置。通过实验研究不同加载工况下,不同管道长度下管道压力传输瞬态特性,验证压力比幅频特性理论值与AMESim仿真模型； 4、通过对比理论分析与实验数据得知,考虑线性摩擦特性的流体管道模型能预测长管道内流体压力传输。
[Abstract]:In this paper , a long pipeline hydraulic valve control cylinder system is used as the research object , and the time domain and frequency domain transmission characteristics of system pressure and flow are studied from three aspects of theory , simulation and experiment , which are mainly studied from the following aspects :

1 . When the fluid is transported in the pipeline , considering the linear friction characteristics of the fluid , the pressure ratio transmission amplitude frequency characteristic model of the pipeline inlet and outlet is established , and the influence rule of the inner diameter , the length and the fluid parameter of the pipeline on the pipeline pressure transmission is solved through Matlab programming ;

2 . The simulation model of the hydraulic valve control cylinder system of long pipeline is built by using the software . The model of proportional control valve and proportional relief valve is set up through HCD library , and the valve parameter setting corresponding to the sample is obtained through checking the sample phase of the selected valve , and the flow of pipeline sub - model selection in the software is summarized , and the pressure and flow transmission characteristics of the long pipeline valve control cylinder system are obtained considering different fluid and pipeline parameters when considering the pipeline characteristics ;

3 . The hydraulic long pipeline experiment platform is constructed . A large thrust variable load counter top oil cylinder device is designed and designed on the structure .
The transient characteristics of pipeline pressure transmission under different loading conditions under different loading conditions are studied .

4 . By comparing the theoretical analysis and experimental data , it is known that the fluid pipeline model considering the linear friction characteristics can predict the fluid pressure transmission in long pipeline .
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.5

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