本文選題：水壓組合閥 + 水壓傳動(dòng)��； 參考：《安徽理工大學(xué)》2017年碩士論文

【摘要】：水壓組合閥是水壓傳動(dòng)技術(shù)研究的重要領(lǐng)域,也是水壓系統(tǒng)重要原件之一。論文所研究的水壓組合閥由先導(dǎo)溢流閥和安全閥組合而成,與傳統(tǒng)的單功能閥相比,該閥具有穩(wěn)壓和安全的綜合性能。水液壓系統(tǒng)回路采用雙功能的水壓組合閥,一定程度上簡(jiǎn)化水壓系統(tǒng)回路,在實(shí)現(xiàn)安全環(huán)保的同時(shí),實(shí)現(xiàn)水壓系統(tǒng)的安裝、檢查以及維修等更加的便捷。根據(jù)水壓組合閥設(shè)計(jì)要求,針對(duì)水壓元件研究中面臨的氣蝕、腐蝕、磨損、振動(dòng)等常見技術(shù)問題,對(duì)水壓組合閥的結(jié)構(gòu)以及動(dòng)態(tài)性能進(jìn)行了仿真分析研究,其過程及結(jié)論如下:1.根據(jù)水壓元件的設(shè)計(jì)原則,確定水壓組合閥主要結(jié)構(gòu)參數(shù)。同時(shí)對(duì)閥的材料進(jìn)行選擇:閥體材料選用鐵素體不銹鋼,閥座采用聚四氟乙烯材料,閥芯采用不銹鋼材料。2.對(duì)主閥芯尾椎部分采用表面微造型設(shè)計(jì),通過對(duì)圓柱、錐形、球冠三種不同形狀微造型的壓力以及氣相體積分?jǐn)?shù)的對(duì)比研究,結(jié)果表明圓柱形微造型性能最優(yōu)。同時(shí)對(duì)不同微造型的加工方法進(jìn)行研究對(duì)比,論文中圓柱形微造型選用激光加工方法。3.利用CAD軟件建立主閥芯不同錐角二級(jí)節(jié)流的二維模型,利用GAMBIT劃分網(wǎng)格,在FLUENT軟件中對(duì)不同模型的主閥芯過流特性進(jìn)行分析比較。研究結(jié)果:一級(jí)閥芯錐角30°,二級(jí)閥芯錐角45°,并在二級(jí)閥芯處采用60°的直線過渡,過渡直線長(zhǎng)度為3mm,同時(shí)采用半徑3mm的圓弧過渡。4.利用AMESIM軟件仿真分析水壓組合閥中不同參數(shù)的主閥阻尼孔、先導(dǎo)閥阻尼孔以及主閥彈簧的剛度對(duì)閥動(dòng)態(tài)性能影響。研究結(jié)果為主閥阻尼孔直徑dd=1mm,先導(dǎo)閥阻尼孔直徑d0=2mm,主閥彈簧剛度小于20.5KN/m時(shí),不同剛度對(duì)水壓組合閥性能影響較小,以取值20.5KN/m時(shí)較優(yōu),當(dāng)主閥彈簧剛度取值大于20.5KN/m時(shí),會(huì)出現(xiàn)閥口流量不穩(wěn)定現(xiàn)象。
[Abstract]:Water pressure combined valve is an important field of water pressure transmission technology and one of the important parts of hydraulic system. The hydraulic combination valve studied in this paper is composed of pilot relief valve and safety valve. Compared with the traditional single function valve, the valve has a comprehensive performance of stable pressure and safety. The water hydraulic system loop uses a dual function water pressure combination valve. To a certain extent, the hydraulic system circuit is simplified, and the installation, inspection and maintenance of the hydraulic system are more convenient while realizing the safety and environmental protection. According to the design requirements of the hydraulic pressure combination valve, the structure and dynamics of the hydraulic pressure combination valve are discussed in view of the common technical problems, such as cavitation, corrosion, wear and vibration in the study of hydraulic pressure components. The simulation analysis and research are carried out. The process and conclusion are as follows: 1. according to the design principle of hydraulic components, the main structural parameters of the hydraulic pressure combination valve are determined. At the same time, the material of the valve is selected: the valve body material is ferritic stainless steel, the seat adopts polytetrafluoroethylene material, and the valve core adopts the stainless steel material.2. to the main spool tail vertebra. The comparison of pressure and gas volume fraction of three different shapes of cylindrical, conical and spherical shapes is studied by comparing the pressure of cylinder, cone and spherical crown. The results show that the performance of cylindrical micromodeling is the best. Meanwhile, the processing methods of different micro modeling are compared. In this paper, the cylindrical micromodeling is used to use the laser processing method.3. to make use of CAD software The two dimensional model of two stage throttle of the main valve core with different cone angle is established. The flow characteristics of the main valve core of different models are analyzed and compared in the FLUENT software with GAMBIT. The results are as follows: the first order core cone angle is 30 degrees, the two level valve core cone angle is 45 degrees, and the 60 degree straight line transition is adopted at the two valve core, and the transition line length is 3mm. At the same time, it is adopted at the same time. The circular arc transition.4. with radius 3mm uses AMESIM software to simulate and analyze the main valve damping holes of different parameters in the hydraulic pressure combination valve, the damping hole of the pilot valve and the stiffness of the main valve spring on the dynamic performance of the valve. The results of the study are the main valve damping hole diameter dd=1mm, the damping hole diameter of the pilot valve d0=2mm, and the different stiffness of the main valve spring stiffness less than 20.5KN/m. It has little effect on the performance of the hydraulic pressure combined valve. When the value of 20.5KN/m is better, when the main valve spring stiffness is greater than 20.5KN/m, the flow of the valve port will be unstable.

【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH137.52

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