本文關(guān)鍵詞：射流管伺服閥的數(shù)學(xué)模型構(gòu)建與分析　出處：《蘭州理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 射流管伺服閥 力矩馬達 流場仿真 有限元分析 系統(tǒng)建模

【摘要】：射流管伺服閥因其抗污染能力強、先導(dǎo)級效率高等優(yōu)點,在要求性能可靠、運行穩(wěn)定的液壓控制系統(tǒng)中具有廣泛的應(yīng)用。然而,射流管伺服閥的先導(dǎo)級流場流動特性復(fù)雜、力矩馬達結(jié)構(gòu)精密,由于缺少完善的數(shù)學(xué)模型而其特性不易預(yù)測。因此,射流管伺服閥主要靠已有經(jīng)驗與大量試驗來進行研發(fā)設(shè)計。本文基于數(shù)值仿真方法建立其整體數(shù)學(xué)模型,為射流管伺服閥的模型完善與優(yōu)化設(shè)計提供參考。 以射流管力反饋式兩級電液伺服閥為例,介紹了其基本結(jié)構(gòu)與工作原理,推導(dǎo)了各環(huán)節(jié)的基本數(shù)學(xué)公式。針對射流管閥的先導(dǎo)級流場模型,利用Fluent流場計算軟件求解了其靜態(tài)特性,給出了流場中流體的壓力、氣體含量及速度分布,并分析了上述參數(shù)的分布規(guī)律與變化情況。研究了射流管閥供油壓力、回油壓力、接收孔直徑、噴嘴與接收器之間的距離、兩接收孔夾角、接收器尖劈寬度等參數(shù)變化對射流管閥壓力特性與流量特性的影響。 針對力矩馬達內(nèi)各組件模型,利用Adina有限元仿真軟件建立了力矩馬達的有限元模型,分析了各組件的主要應(yīng)力與變形區(qū)域,求解了彈簧管綜合剛度與反饋彈簧剛度給出了射流管噴嘴位移與銜鐵組件作用力的關(guān)系曲線以及反饋彈簧桿位移與其作用力的關(guān)系曲線。通過對力矩馬達進行模態(tài)分析,獲得了力矩馬達的前6階固有頻率與振型,闡述了在各階固有頻率下的主要振型。 通過上述環(huán)節(jié)求解獲得的關(guān)鍵參數(shù),將主要函數(shù)曲線擬合成相應(yīng)的數(shù)學(xué)方程,并結(jié)合其他環(huán)節(jié)的基本數(shù)學(xué)公式,在基于鍵合圖原理的AMESim系統(tǒng)仿真軟件中構(gòu)建了射流管力反饋式兩級電液伺服閥的整體數(shù)學(xué)模型,給出了射流管伺服閥在各種輸入信號下的輸出流量響應(yīng)曲線,分析了主要參數(shù)對其動態(tài)響應(yīng)特性的影響。 本文以Fluent、Adina、AMESim仿真軟件為工具,通過數(shù)值仿真的手段建立了射流管力反饋式兩級電液伺服閥的整體數(shù)學(xué)模型,模型可以模擬不同結(jié)構(gòu)參數(shù)下閥的靜態(tài)與動態(tài)性能。該建模流程為射流管伺服閥的產(chǎn)品設(shè)計與研發(fā)提供了參考依據(jù),有利于提高新產(chǎn)品的研發(fā)效率,同時對其他各類電液伺服閥的仿真有一定的借鑒意義。
[Abstract]:The jet pipe servo valve is widely used in the hydraulic control system which requires reliable performance and stable operation because of its strong anti-pollution ability and high lead efficiency. The flow characteristics of the pilot stage of the jet tube servo valve are complex, the torque motor structure is precise, and its characteristics are difficult to predict because of the lack of perfect mathematical model. Based on the numerical simulation method, the whole mathematical model of the jet tube servo valve is established in this paper, which provides a reference for the model improvement and optimization design of the jet tube servo valve. Taking the two-stage electro-hydraulic servo valve with jet pipe force feedback as an example, this paper introduces its basic structure and working principle, deduces the basic mathematical formula of each link, and aims at the pilot stage flow field model of the jet pipe valve. The static characteristics of the flow field are solved by using the Fluent flow field calculation software, and the pressure, gas content and velocity distribution of the fluid in the flow field are given. The distribution and variation of the above parameters are analyzed. The oil supply pressure, return oil pressure, the diameter of the receiving hole, the distance between the nozzle and the receiver, and the angle between the two receiving holes are studied. The influence of nozzle width and other parameters on the pressure and flow characteristics of the jet pipe valve. The finite element model of torque motor is established by using Adina finite element simulation software, and the main stress and deformation regions of each component are analyzed. The relationship curve between the nozzle displacement of the jet tube and the force of the armature assembly and the curve between the displacement of the feedback spring rod and the force acting on the armature assembly are obtained by solving the comprehensive stiffness of the spring tube and the feedback spring stiffness. The simulation of the torque motor is carried out. State analysis. The first six natural frequencies and modes of the torque motor are obtained, and the main modes under each natural frequency are described. By solving the key parameters of the above links, the main function curves are fitted into the corresponding mathematical equations, and combined with the basic mathematical formulas of other links. In the AMESim system simulation software based on bond graph principle, the integral mathematical model of two-stage electro-hydraulic servo valve with jet pipe force feedback is constructed. The output flow response curve of the jet tube servo valve under various input signals is given, and the influence of main parameters on its dynamic response characteristics is analyzed. In this paper, the overall mathematical model of the two-stage electro-hydraulic servo valve with jet pipe force feedback is established by means of numerical simulation with fluentine Adinaan AMESim simulation software. The model can simulate the static and dynamic performance of the valve under different structural parameters. The modeling process provides a reference for the design and development of the jet tube servo valve, and is helpful to improve the efficiency of the new product research and development. At the same time, the simulation of other kinds of electro-hydraulic servo valve has certain reference significance.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH134;O242.1

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