低温阀阀杆梯形螺纹公差的研究

:100225855(2010)0120020202:(1946-),,,(,200949),,-196,9,;;;:TH134:ATrapezoidalthreadtoleranceresearchofthecryovalveYANRen2xing(ShanghaiGenerralGasValveFactory,Baoshandistrict,Shanghai200949,China)Abstract:Accordingtomaterialslowtemperaturecoefficientoflinearexpansion,thepapertheoretical2lyperformsananalyticalstudyontrapezoidalthreadaccuracyclassofcryovalve,andconfirmsthatthenon-risingvalvescommonmaterialtrapezoidalthreadwith9accuracyclassiscompletelyreasonableevenunder-minimumtemperatureworkingcondition(-196).Thenthereisnoneedtoincreasethegapexcessivelybetweenoutsidethreadfaceandinternalthreadface.Keywords:cryovalve;stem;trapezoidal;tolerance1,-46-101-196JB/T9081-1999,GB/T5976149,,9,,2,,,304,,,,,,,8e,8e(1),1DN40mm8e9c()Tr182-8eTr182-9cTr182-d180-0118180-0118180-0118d217-01071-0132117-01150-0146516150-01315d1151500138315150015441515001544Tr182-8HTr182-9HTr182-9HD181518151815D217-01335017-01425017-014250D116-01236016-01236016-01236002201013,2DJF40,-19612RH62HPb59-1AB304ABAB(9%Ni)AB0-495169-2931164100326035602320160-335169-2041273676136301417832451212182162174189-320182-19635713261882931565119180-315169-19311635471062915133313518421231075606413117195010150910009140061842A560R,BA10-5=(L560-L)/L560(1)B10-6=(L/T)(1/L560)(2)ABm/min./in.,m/(mR)in./(in.R)=R-495169(3)=(-32)5/9(4)1DJF40,18mmL118mm304L2(1),L1=L560-L=A10-5L560=35713210-518=0106432mmL2=L560-L=A10-5L560=29315610-518=0105284mmL3L3=L1-L2=0101148mm,L(2)2L=(L3/2)tg15=0100154mmDJF40,20mm,,L560=20mmL1304L2(1),L1=L560-L=A10-5L560=35713210-520=01071464mmL2=L560-L=A10-5L560=29315610-520=01058712mmL3L3=L1-L2=01012752mm3(26)1220101aN=116mm,cN=3018mm121(3)Sr,Krr,,Krr01707,Sr018,,BS7910712SrKrr,CvJmatCTODKrr,312,BS7910713,LrLrmax=(Y+U)/2YrKr(1-0114Lr2)[013+017exp(-0165Lr6)]Y012%,MPau,MPa,,1,LrKrr,CvJmatCTODKrr),Krr019,Lr1109,7,12,1212,,,,,,1BS7910-1999,S.(:2009107110)(21)3mm8e9c01049872=01089740106962=0113920111652=012330(010696-0100154)2-0101275=011234(011165-0100154)2-0101275=0121724DN40,-196,010158mm,9c8e01026mm,,JB/T9081-19999,1JB/T9081-1999,.(:2009106103)6220101