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26 220054SpecialPurposeRubberProductsVol.26 No.2 April2005(67, 266042) :,,,。:;;:TQ330.4+93 :A :1005-4030(2005)02-0024-04:2004-07-30:(1964-),,,。 ,,,,,,。,,,。。,,,,,。、1 。,(a)、(b)(c)3[1],1。,。。1 ,(),。Vx()。,Q,XVx,QVx。2。,2(a)。,。,。,:Q=4πR21V1=4πR22V2(1):V1,V2———12,m/s;R1,R2———12,m。(1):V1/V2=(R2/R1)2(2)(2),。,。,。,2(b),,2005 25 ,,:Q′=2πR21V1=2πR22V2(3)(1)、(3),,,。,。2 ,,。、。2 ,,。,[2],,。,。,,。。2.1 ,,,。,,。,1。:Q=3600AVp1(4):Q———,m3/h;A———,m2;Vp1———,m/s。1 m/s,(1);(2);(3)0.25～0.5,(1);(2);(3)0.5～1.0,(1)、;(2)、;(3)1.0～2.5,(1);(2);(3)2.5～103(a),3(b)。::A=LW(5):L=l+0.5h(6) W=w+0.5h(7):A=πR2(8):R=r+0.25h(9):L———,m;W———,m;l———,m;w———,m;h———,m;R———,m;r———,m。(4),Vp1,Q,A。lw,Q,h。,,h。,。,。60°,、;60°,。26 26 23 ,,,60°[3]。2.2 4,:Q=3600GhVp2(10):Q———,m3/h;G———,m;,G=2LW;,G=2πR;Vp2———m/s,,0.2～2m/s。4 。2.3 ,。:,。。。。、,。,。3 。,。,,。,,,。,。,,,。,。,,。,,。:[1] .[M].:,2004,234.[2] .[M].:,2003,7.[3] .[M].:,1997,123.(29)2005 —29 。[1],,、,[2],、、、。、、、,1。9.3%,17.6%,。50∶250,-20℃,60mm,2.3×105,1.7×10535.3%。3 :(1)———(),;(2);(3),。:[1] .———、[M].:,1998.371.[2] .[J].,2003,24(1):25-26.AccordionFoldedBootofShock-absorbingCylinderCavity-AirPressureFormingProcessLIUJin-wen(ChangleRubberMachineryTestPlant,QingdaoDesignInstituteofRubberIndustry,Changle 262400,China)Abstract:Thekeytechniqueofairpressureformingprocesstoproduceaccordionfoldedbootforvehicle,thattheratioofthediametertolengthwas50∶250,wassummarized.Theagingproperty,crackandfatigureresistanceofaccordionfoldedbootwerereviewedinpractice.Keywords:shock-absorbingcylinder,wave,protectiveboot,airpressureforming(26)DesignandCalculationofDustAbsorbingCoverintheVentilatingandDustRemovingSystemLIZhi-hua(QingdaoUniversityofScience&Technology,Qingdao 266042,China)Abstract:Thedustabsorbingcoverwasanimportantpartintheventilatinganddustremovingsystem.Byanalyzingtheairflowingregular,thedesigningandcalculatingmethodsforthedustab-sorbingcoverwasputforward,thedesigningprinciplebeingfollowed,andthebasisforexactlydesig-ningtheventilatinganddustremovingsystemwasprovided.Keywords:dustremoving,dustabsorbingcover,designandcalculation