蝶閥閥桿力矩計算書,,,,,,,,,,,

項目,符號,分支,公式或索引,給定值,查表值,計算值,單位,,單位,數(shù)據(jù)來源,解釋

中線蝶閥閥桿力矩,,,,,,238461.3075,N·m,24307.98241,Kgf.m,,

偏心蝶閥閥桿力矩,,,,,,238851.2222,N·m,24347.72907,Kgf.m,,

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公稱壓力,p,,,0.6,,,MPa,,,,

一次偏心,e1,,,200,,,mm,,,,

二次偏心,e2,,,18,,,mm,,,,

閥板直徑,D,,,2400,,,mm,,,,

管子截面積,A,,,,,4.523893344,m2,,,,

硬密封最小流道直徑,,,如,,,,,,,,

硬最小流道面積,,,"硬密封按圖求,但現(xiàn)估算",,,,m2,,,,

密封圈壓裝后外徑,DC1,,如,2362,,,mm,,,,

軟最小流道直徑,,,,,,2354,mm,,,,

軟最小流道面積,,,軟密封按公式,,,4.352139409,m2,,,,

全開時介質(zhì)流速,V0,,,5,,,m/s,,,,根椐設計院給定流速計算的值

全開時的體積流量,Ｑ,,,,,78260,m3/h,,,,根椐設計院給定流速計算的值

關閥時間,t,,,90,,90,s,,,,根椐設計院給定流速計算的值

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不平衡力矩,ME,三偏心金屬密封,,,,5586000,N.mm,570,Kgf.m,AutoCAD2002專用軟件計算,

,ME,二偏心軟密封,,,,5586000,N.mm,570,Kgf.m,,略大于硬密封的值

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密封面間的摩攛力矩,MM,三偏心金屬密封,,,,4704000,N·mm,480,Kgf.m,AutoCAD2002專用軟件計算,

,,無偏心軟密封,,,,27385473.84,N·mm,2794.436107,Kgf.m,,

,,單偏心軟密封,,,,27775388.6,N·mm,2834.223326,Kgf.m,,

,,雙偏心軟密封,近似等于單偏心軟密封的值,,,27775388.6,N·mm,2834.223326,Kgf.m,,其值接近于單偏心軟密封

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密封面間的摩攛系數(shù),?M,,對于橡膠密封圈?M=0.8～1,0.65,,,,,,,

密封面寬度,bM,,,3,,,mm,SolidWorks將各種規(guī)格密封圈畫,,,

,R,軟密封,"密封接觸中性位置直徑,如:",1181,,,mm,,,,

密封面必須比壓,qM,軟密封,,,,2.517247174,MPa,,,,

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閥桿軸承的摩攛力矩,MC,全密封狀態(tài)開閥瞬間,Mc=Qc*fc*df/2,,,14928848.29,N·mm,1523.351866,Kgf.m,,

閥桿軸承的摩攛力矩,MC,開閥過程,Mc=Qd*fc*df/2,,,73755765.43,N·mm,7526.098513,Kgf.m,,

,?c,,,0.05,,,,,,,DF-1的摩擦系數(shù)

配合位軸徑,d?,,如:,220,,,mm,,,,設計試給數(shù)

,Qc,全密封狀態(tài)開閥瞬間,πD^2*p/4,,,2714336.053,N,,,,

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動水作用力,Qd,啟閉過程,Qd=2*10^(-8)g*λ(α)*H*D^(2)/ζ(α)-ζ(0)+2*g*H/V0^(2),,,13410139.17,N,,,,

重力加速度g,g,,,9810,,,mm/s2,,,,

開度為α角時的各項系數(shù):取70°,,,"動水力矩一般在60°～80°范圍內(nèi)最大,70°時最大",,,,,,全開為90°,,

,ζα,,"表5-158:D是蝶板最大外徑,b是蝶板最大厚度一般b/D=0.15～0.25;",,332,,,,,,

,λα,,,,13990,,,,,,

,μα,,,,84.7,,,,,,

,ζ0,,,,0.096,,,,,,

由于水擊作用在閥前產(chǎn)生的壓力升值,△p,,△p=0.04Q/At,,,7.991982552,MPa,,,,

計算升壓在內(nèi)的最大靜水壓頭,H,,H=9.8*10^(4)*(P+△p),,,842014.2901,mm,,,,

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密封填料的摩擦力矩,MT,,Mt=Qt*df/2,,,374374.968,N·mm,38.20152735,Kgf.m,,

閥桿與填料的摩攛力,Qt,,Qt=ψ*df*bt*p,,,3403.4088,N,,,,

系數(shù)ψ,ψ,,,1.882,,,,,,,查表3-15

填料寬度bt,bt,,,13.7,,,mm,,,,

填料深度ht,ht,,,95,,,mm,,,,

ht/bt,,,,,,6.934306569,,,,,

配合位軸徑df,df,,,220,,,mm,,,,

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靜水力矩,Mj,,,,,918207.9084,N·mm,93.69468453,Kgf.m,,

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動水力矩,Md,,Md=2*10^(-9)*g*μ(α)*H*D^(3)/ζ(α)-ζ(0)+2*g*H/V^(2),,,194854402.5,N·mm,19883.10229,Kgf.m,,

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中線蝶閥閥桿力矩,,,,,,238461307