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经典图书 Ihavereadsomethingaboutbeltdrivethesetwodays.Ihavereviewedbeltdriveinmycollegetextbooknamed《MechanicalDesign》.ForthesakeoflearningMechanicalEnglish,IalsoreadbeltdriveinanEnglishbooknamed《MachineelementsinMechanicalDesign》.IthinkmaybeagoodwaytolearnMechanicalEnglish.SinceyouhavereadtheChineseversionpriortotheEnglishversion,youwillnotfinditdifficulttounderstandthemechanicalphrasesintheEnglishbook.
Summaryisveryimportantwhenyouhavejustlearnedsomething.Andmakingsummariesisaveryimportantsteptohelpyourememberwhatyouhavelearnedfirmly.Iwillmakethisahabitinthefollowingdays.
Beltdrive:
1.Manytypesofbeltsareavailable:flatbelts;groovedorcoggedbelts;standardV-belts;narrowV-belts;doubleangleV-belts;andothers.
2.Advantagesofbeltdrive:
a.Easetheimpactload
b.Operatesmoothlywithlownoise
c.Lowmanufactureandassemblyprecision
d.Overloadprotection
e.Largecenterdistancecanbereached
3.Disadvantagesofbeltdrive:
a.Lowtransmissionefficiency
b.Shortbeltlife
c.Speedratioisnotaccuratebecauseofelasticslip
4.Flatbeltcanbeinanylength.Wecancutitasweneed.Thenweconnectitandtheconnectorsmaymaketheoperationnotsmooth.
5.V-belthasnoconnectors.SowehavetochooseastandardlengthforaV-belt.
6.CogV-beltswhichareappliedtostandardV-groovedsheaveshavealongerlife.Thecogsgivethebeltgreaterflexibilityandhigherefficiencycomparedwithstandardbelts.Theycanoperateonsmallersheaves.
7.Thevalueoftheinitialtensionforceandtheangleofwrapcannotbetoolow.
8.Becauseofelasticslip,theoutputsheavehasalowerspeedthantheinputsheave.
9.Elasticslipwhichcannotbeeliminatedwillcausetheriseoftemperature.
10.V-beltisthemostwidelyusedtypeofallthebelts.
11.NarrowV-beltisbetterthanstandardV-beltanditcantotallyreplacestandardV-belt.
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