J72JB/T766219951995-06-161996-07-01()1122.1volumetricelement2.2passingvolume2.3closedvolume2.3.1suctionclosedvolume2.3.2dischargeclosedvolume2.4internalleakage2.5externalleakage2.6terminalclearance2.7radialclearance2.8intermeshingclearance2.9internalcompression1995-06-16JB/T766219951996-07-01()JB/T7662199522.10internalpressureratiobuilt–inpressureratio2.11externalpressureratioactualpressureratio2.12volumeratio2.13eccentricallymounting2.14rotaryhelicoid2.15profile2.16meshing2.17touchpoint2.18touchcurve2.19meshpoint2.20meshcurve2.21instantaneousmeshcurve2.22meshcurvedsurface33.1screwcompressor3.2slidingvanecompressor3.3liquidringcompressorJB/T7662199533.4singlescrewcompressor3.5two–loberotorcompressor3.6rotatingpistoncompressor3.6.1rollrotarycompressor3.6.2Wankelcompressor3.7scrollcompressor3.8drycompressor3.9liquidinjectedcompressor3.9.1oil–floodedcompressor3.9.2waterinjectedcompressor3.10oil–dropcompressor44.1nominaldiameterofscrewrotor4.2length–diameterratio4.2.1length–diameterratioofscrewrotor4.2.2ratioofrotorefficientlengthtocylinderradius4.3arealcoefficientJB/T7662199544.3.1arealcoefficientofscrewcompressor4.3.2arealcoefficientofslidingvanecompressor4.4addendumcoefficient4.5dedendumcoefficient4.6warpanglecoefficient4.7lead4.8warpangle4.9helixangle4.10angleofpitch4.11malerotorpackingvolume4.12femalerotorpackingvolume4.13relativeeccentricity4.14relativethicknessofblade4.15rotaryefficientlength4.16blade–tipvelocity4.17includedangleoftwoblades4.18degreeoflean4.19diameterratioofgaterotortomainrotorJB/T7662199554.20meshingangleofgaterotor4.21axiallengthofsidesuction4.22axiallengthofsidedischarge55.1frontsegmentofprofile5.2backsegmentofprofile5.3symmetricalprofile5.4asymmetricalprofile5.5single–sideprofile5.6double–sideprofile5.7profileofpinroller5.8suctionangleoffemalerotor5.9suctionangleofmalerotor5.10initialangleofinternalcompressionofmalerottor5.11angleofmalerotorinternalcompression5.12axialsuctionangleofmalerotor5.13axialportofsuctionordischarge5.14diametricalportofsuctionofdischarge5.15suctionportangleJB/T7662199565.16dischargedportangle5.17blowhole66.1casing6.2cylinder6.3rotor6.4malerotor6.5femalerotor6.6timinggear6.7balancingpiston6.8bladeslidingvane6.9unloadring6.10mainrotor6.11gaterotor6.12orbitingscroll6.13fixedscroll6.14rollingpiston6.15capacityslidinggoverningdeviceJB/T7662199576.16minimumpressurevalre6.17automaticreleasevalve6.18oil–gasseparator7ABJB/T766219958AB5.4C2.24.24.45.15.2D2.63.43.104.75.35.56.106.12F2.34.10G3.6.13.84.56.14H3.23.64.2.24.3.24.164.176.86.15J2.12.72.172.184.215.146.16.13L3.14.14.2.14.3.14.9M4.3N2.42.82.92.102.162.192.202.224.64.8P2.3.22.13JB/T7662199593.93.9.13.9.24.225.166.7Q6.2R2.12S2.213.55.6T6.6W2.52.113.6.23.7X2.3.12.142.154.134.144.184.194.205.75.155.176.96.11Y3.34.114.125.85.95.105.115.126.46.56.18Z4.155.136.36.166.17JB/T7662199510BAaddendumcoefficient4.4angleofmalerotorinternalcompression5.11angleofpitch4.10arealcoefficient4.3arealcoefficientofscrewcompressor4.3.1arealcoefficientofslidingvanecompressor4.3.2asymmetricalprofile5.4automaticreleasevalve6.17axiallengthofsidedischgrge4.22axiallengthofsidesuction4.21axialportofsuctionordischarge5.13axialsuctionangleofmalerotor5.12Bbacksegmentofprofile5.2balancingpiston6.7blade–tipvelocity4.16bladeslidingvane6.8blowhole5.17Ccapacityslidinggoverningdevice6.15casing6.1closedvolume2.3cylinder6.2Ddedendumcoefficient4.5degreeoflean4.18diameterratioofgaterotortomainrotor4.19diametricalportofsuctionofdischarge5.14dischargeclosedvolume2.3.2dischargedportangle5.16double–sideprofile5.6drycompressor3.8JB/T7662199511Eeccentricallymounting2.13externalleakage2.5externalpressureratioactualpressureratio2.11Ffemalerotor6.5femalerotorpackingvolume4.12fixedscroll6.13frontsegmentofprofile5.1Ggaterotor6.11Hhelixangle4.9Iincludedangleoftwoblades4.17initialangleofinternalcompressionofmalerotor5.10instantaneousmeshcurve2.21intermeshingclearance2.8internalcompression2.9internalleakage2.4internalpressureratiobuilt–inpressureratio2.10Llead4.7length–diameterratio4.2length–diameterratioofscrewrotor4.2.1liquidinjectedcompressor3.9liquidringcompressor3.3Mmainrotor6.10malerotor6.4malerotorpackingvolume4.11meshcurve2.20meshcurvedsurface2.22meshing2.16meshingangleofgaterotor4.20meshpoint2.19JB/T7662199512minimumpressurevalve6.16Nnominaldiameterofscrewrotor4.1Ooil–dropcompressor3.10oil–floodedcompressor3.9.1oil–gasseparator6.18orbitingscroll6.12Ppassingvolume2.2profile2.15profileofpinroller5.7Rradialclearance2.7ratioofrotorefficientlengthtocylinderradius4.2.2relativeeccentricity4.13relativethicknessofblade4.14rollingpiston6.14rollrotarycompressor3.6.1rotaryefficientlength4.15rotaryhelicoid2.14rotatingpistoncompressor3.6rotor6.3Sscrewcompressor3.1scrollcompressor3.7singlescrewcompressor3.4single–sideprofile5.5slidingvanecompressor3.2suctionangleoffemalerotor5.8suctionangleofmalerotor5.9suctionclosedvolume2.3.1suctionportangle5.15symmetricalprofile5.3Tterminalclearance2.6timinggear6.6JB/T7662199513touchcurve2.18touchpoint2.17two–lober