【正文】 武漢理工大學(xué)畢業(yè)設(shè)計（論文） 摘要 ................................................................ I ABSTRACT ........................................................... II 1 緒論 .............................................................. 1 .......................................................... 1 ........................................................ 1 、方法和目標(biāo) ........................................ 2 2 球閥的結(jié)構(gòu)設(shè)計及校核 ................................................ 3 、作用原理、特點和結(jié)構(gòu)分類 .................................. 3 ........................................................ 3 .................................................... 3 ........................................................ 3 .................................................... 4 ........................................................ 4 .......................................... 5 .................................................... 5 ...................................................... 5 .................................................... 6 ...................................................... 7 ........................................................ 8 閥體設(shè)計 ............................................................. 9 、連接形式、結(jié)構(gòu)長度和材料的確定 ....................... 9 ................................................... 10 閥體法蘭設(shè)計 .................................................... 10 閥體法蘭校核 .................................................... 11 閥桿的設(shè)計和校核 ..................................................... 14 閥桿材料選擇 .................................................... 14 閥桿填料的選擇、填料摩擦力及摩擦轉(zhuǎn)矩的計算 ....................... 15 閥桿強(qiáng)度的計算 .................................................. 16 閥桿連接件的強(qiáng)度計算 ................................................. 18 球體的設(shè)計和校核 ..................................................... 20 球閥的閥座設(shè)計 ...................................................... 21 省力機(jī)構(gòu)的設(shè)計和校核 ................................................ 22 .................................................. 23 .............................................. 23 武漢理工大學(xué)畢業(yè)設(shè)計（論文） 3 ANSYS軟件分析 ..................................................... 24 ................................................ 24 模型的導(dǎo)入和分析 ..................................................... 26 模型的簡化、導(dǎo)入和分析準(zhǔn)備 ....................................... 26 模型的材料定義 .................................................. 27 模型的加載和邊界條件的確定 ....................................... 28 模型的加載后分析結(jié)果 ............................................. 29 ANSYS結(jié)果分析 ................................................... 33 結(jié) 論 ............................................................. 34 參考文獻(xiàn) ...................................................................................................................................................... 35 致謝 ............................................................................................................................................................... 36 武漢理工大學(xué)畢業(yè)設(shè)計（論文） I 摘要 本文根據(jù)已知的球閥設(shè)計經(jīng)驗對 DN為 250mm，設(shè)計壓力為 2Mpa的球閥進(jìn)行設(shè)計，主要包括了材料選擇、結(jié)構(gòu)設(shè)計和強(qiáng)度校核等，在結(jié)構(gòu)和材料方面在滿足強(qiáng)度的前提下，盡量降低結(jié)構(gòu)的復(fù)雜性，以更小的消耗、更簡單的結(jié)構(gòu)來實現(xiàn)成品的設(shè)計優(yōu)化，同時對球閥的主要部件進(jìn)行應(yīng)力的軟件分析。省力機(jī)構(gòu)作為設(shè)計任務(wù)的一部分，我們需要根據(jù)球閥的特點來選擇合適的機(jī)構(gòu)。 本設(shè)計以已給的設(shè)計條件為著眼點，同時根據(jù)國家閥門標(biāo)準(zhǔn)為中心，借助soliderworks三維軟件、 AUTOCAD二維制圖軟件和 ANSYS分析軟件根據(jù)球閥設(shè)計手冊的標(biāo)準(zhǔn)框架的結(jié)構(gòu)形式對產(chǎn)品進(jìn)行了三維建模、二維制圖和應(yīng)力分析，最終確定球閥的結(jié)構(gòu)形式和省力開啟方式，這對以后設(shè)計與研究同類球閥具有一定的參考價值。 關(guān)鍵詞： 結(jié)構(gòu)設(shè)計、強(qiáng)度校核、應(yīng)力分析、省力機(jī)構(gòu) 武漢理工大學(xué)畢業(yè)設(shè)計（論文） II Abstract This article according to the known ball valve design experience to DN is 250mm, the design pressure is the 2Mpa ball valve carries on the design, mainly has included the choice of material, the structural design and the intensity examination and so on。 In the structure and material aspect in satisfying under the intensity premise, reduce the structure as far as possible the plexity, by a smaller consumption, a simpler structure realizes the end product design optimization, simultaneously carries on the stress to ball valve39。s major ponent the software analysis. The province strength anization does for a task of design part, we need to choose the appropriate anization according to ball valve39。s characteristic. This design takes the given design conditions as the objective point, simultaneously according to the national valve standard is the center, with the aid of the soliderworks three dimensional software and AUTOCAD twodimensional charting software and ANSYS analysis software has carried on the three dimensional modelling, the twodimensional charting and stress analysis according to the ball valve design handbook39。s standard frame39。s structural style to the product, finally determined that ball valve39。s structural style and province strength opening way, this will have certain reference value to the later design and research similar ball valve. Key words： Structural design, intensity examination, stress analysis and reducing effort anization 武漢理工大學(xué)畢業(yè)設(shè)計（論文） 1 1 緒論 球閥是上世紀(jì) 50年代問世的一種新型閥門。在短短的 30多年里，球閥已發(fā)展成為一種主要的閥類，它在航空航天、石油化工、長輸管線、輕工食品、建筑等許多方面都得到了廣泛的應(yīng)用。早在 19世紀(jì) 80年代美國就開始設(shè)計球閥，但是當(dāng)時缺乏適當(dāng)?shù)拿芊獠牧希?