外文翻译--包络法的资产负债.doc
英文原文AENVELOPEMETHODOFGEARINGFOLLOWINGSTOSIC1998,SCREWCOMPRESSORROTORSARETREATEDHEREASHELICALGEARSWITHNONPARALLELANDNONINTERSECTING,ORCROSSEDAXESASPRESENTEDATFIGA1X01,Y01ANDX02,Y02ARETHEPOINTCOORDINATESATTHEENDROTORSECTIONINTHECOORDINATESYSTEMSFIXEDTOTHEMAINANDGATEROTORS,ASISPRESENTEDINFIG13ΣISTHEROTATIONANGLEAROUNDTHEXAXESROTATIONOFTHEROTORSHAFTISTHENATURALROTORMOVEMENTINITSBEARINGSWHILETHEMAINROTORROTATESTHROUGHANGLEΘ,THEGATEROTORROTATESTHROUGHANGLEΤR1W/R2WΘZ2/Z1Θ,WHERERWANDZARETHEPITCHCIRCLERADIIANDNUMBEROFROTORLOBESRESPECTIVELYINADDITIONWEDEFINEEXTERNALANDINTERNALROTORRADIIR1ER1WR1ANDR1IR1W−R0THEDISTANCEBETWEENTHEROTORAXESISCR1WR2WPISTHEROTORLEADGIVENFORUNITROTORROTATIONANGLEINDICES1AND2RELATETOTHEMAINANDGATEROTORRESPECTIVELYFIGA1COORDINATESYSTEMOFHELICALGEARSWITHNONPARALLELANDNONINTERSECTINGAXESTHEPROCEDURESTARTSWITHAGIVEN,ORGENERATINGSURFACER1T,ΘFORWHICHAMESHING,ORGENERATEDSURFACEISTOBEDETERMINEDAFAMILYOFSUCHGENERATEDSURFACESISGIVENINPARAMETRICFORMBYR2T,Θ,Τ,WHERETISAPROfiLEPARAMETE