lb球閥設(shè)計(jì)計(jì)算書(shū)

1、lb球閥設(shè)計(jì)計(jì)算書(shū)球閥設(shè)計(jì)計(jì)算書(shū)lb球閥設(shè)計(jì)計(jì)算書(shū)球閥設(shè)計(jì)計(jì)算書(shū)2″~8″Q41F150Lb編制:審核:二○○三年五月二十三日浙江閥門(mén)制造有限公司目錄1.閥體壁厚計(jì)算————————————————————12.中法蘭強(qiáng)度計(jì)算———————————————————23.法蘭螺栓拉應(yīng)力驗(yàn)算—————————————————74.力矩計(jì)算——————————————————————85.閥桿強(qiáng)度校算————————————————————1

2、16.密封比壓計(jì)算————————————————————137.作用在手柄上的啟閉所需力——————————————15一、閥體壁厚計(jì)算：計(jì)算公式：式中：t－閥體計(jì)算壁厚（英寸）；Pc－額定壓力等級(jí)（磅）；Pc=150d－公稱(chēng)通徑（英寸）；S－材料需要用的應(yīng)力（磅平方英寸）S=7000C－附加余量（英寸）按ANSIB16.34C=0.1英寸英寸(毫米)口徑2″2.5″3″4″6″8″t0.13(3.3)0.14(3.57)0.15(3

3、.81)0.17(4.32)0.2(5.08)0.23(5.84)查ANSIB16.34得壁厚0.22(5.59)0.22(5.59)0.22(5.59)0.25(6.35)0.28(7.11)0.31(7.87)實(shí)際確定壁厚0.28(7.0)0.28(7.0)0.2841(7.0)0.31(8.0)0.35(9.0)0.39(10.0)實(shí)際確定壁厚≥計(jì)算壁厚為合格二.中法蘭強(qiáng)度計(jì)算：1.中法蘭的軸向應(yīng)力計(jì)算：式中：9005078FD1

4、134317309277724171398125170973SD12.513.52015.52131.25Fr1093134430003660800710519Sr161622192535FG992214112226133270662155101354SG15.515.52017.522.532.5Di85105133163250330S91016.510.514.525δ1777101312.5Db120140180205305405

5、DG89109140170260340Wp22358327655338578079168287282846F12436186533077245373106132181492Fp5592684910996133522042026704Q4330726311618193544173474651b445555Dm52.56886111163218δf141717202236e0.04100.03690.03280.02770.02110.01

6、74T1.591.651.661.721.761.78A8693108691223335603107581111700δIS7778910U44.54.55.777V0.550.550.550.370.250.36λ1.61.82.12.22.32.5D0152172216241345445D0Di1.791.641.621.481.381.35σH≤〔σH〕=130.5合格2.中法蘭的徑向應(yīng)力計(jì)算:式中：σR－法蘭的徑向應(yīng)力（Mpa）

7、［σR］－法蘭許用的徑向應(yīng)力（Mpa）口徑2″2.5″3″4″6″8″σR211623162115σR≤〔σR〕=108合格3.中法蘭的切向應(yīng)力計(jì)算:式中：Y－系數(shù)（查表）；Z－系數(shù)（查表）；σT－法蘭的切向應(yīng)力（Mpa）［σT］－法蘭材料的切向應(yīng)力（Mpa）口徑2″2.5″3″4″6″8″σT413656468156Y3.514.114.185.146.196.65Z1.912.192.222.693.213.44σT≤〔σT〕=10