Tài liệu CLUTCHES AND BRAKES Design and Selection

Tài liệu CLUTCHES AND BRAKES Design and Selection

Tài liệu CLUTCHES AND BRAKES Design and Selection

... and Eddy-CurrentBrakes and Clutches 125I. Theoretical Background 126II. Magnetic Particle Brakes and Clutches 130III. Hysteresis Brakes and Clutches 132Contentsx IV. Eddy-Current Brakes and Clutches ... Collection 81Chapter 5 Dry and Wet Disk Brakes and Clutches 83I. Caliper Disk Brakes 84II. Ventilated Disk Brakes 91III. Annular Contact Disk Brakes an...
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Tài liệu Clutches and brakes design and selection P2 doc

Tài liệu Clutches and brakes design and selection P2 doc

... 2 BandBrakes Bandbrakesaresimplerandlessexpensivethanmostotherbrakingdevices, withshoebrakes,asperhapstheirnearestrival.Becauseoftheirsimplicity, theymaybeproducedeasilybymostequipmentmanufacturerswithout havingtopurchasespecialequipmentandwithouthavingtousefoundryor forgingfacilities.Onlytheliningmustbepurchasedfromoutsidesources. Bandbrakesareusedinmanyapplicationssuchasinautomatic transmis...
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Tài liệu Clutches and brakes design and selection P3 docx

Tài liệu Clutches and brakes design and selection P3 docx

... f 0 ð1-14Þ Externally and Internally Pivoted Shoe Brakes 37 Copyright © 2004 Marcel Dekker, Inc. 3 ExternallyandInternallyPivotedShoe Brakes TypicalexternallyandinternallypivotedshoebrakesareshowninFigures1 and ... brake life, heat dissipation, fading, and braking torque capability. III. DESIGN OF DUAL-ANCHOR TWIN-SHOE DRUM BRAKES For both external and internal shoes and for...
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Tài liệu Clutches and brakes design and selection P4 pdf

Tài liệu Clutches and brakes design and selection P4 pdf

... 4 LinearlyActingExternalandInternal DrumBrakes Linearlyactingdrumbrakesarethosefittedwithshoeswhich,whenacti- vated,approachthedrumbymovingparalleltoaradiusthroughthecen- teroftheshoe.TypicallinearlyactingdrumbrakesareillustratedinFigures 1–3. Analysisoflinearlyactingbrakesincludesthoseinwhichthecentrally pivotedshoesareattachedtopivotedlevers,asinFigure1.Includingbrakes ofthisdesignwithinthec...
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Tài liệu Clutches and brakes design and selection P5 docx

Tài liệu Clutches and brakes design and selection P5 docx

... Inc. Evaluationoftheseintegralsiseasiestforbrakepadswithradialand circularboundaries,asinFigure4,forwhichequation(1-4 )and( 1-5)maybe writtenusingadummyvariablefas F¼p max r i Z A 1 r da¼p max r i Z r 0 r i Z u 0 dfdrð1-6Þ ¼p max r i uðr 0 Àr i Þ and T¼Ap max r i Z A da¼Ap max r i Z r o r i rdr Z u 0 df ð1-7Þ ¼Ap max r i u 2 r 2 o Àr 2 i ÀÁ Fromequation(1-7)wefindthatforthepressuredistributi...
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Tài liệu Clutches and brakes design and selection P6 ppt

Tài liệu Clutches and brakes design and selection P6 ppt

... Inc. II.FOLDEDCONEBRAKE Prototypeconebrakeshavebeendesignedandtestedforarangeofvehicle sizes,fromtractorsandtrailerstosubcompactautomobiles[1].Boththelarge andsmallsizesusedafoldedconedesign,asillustratedinFigures 5and6 , eachwitha=27j.Althoughtheconebrakehasfewerpartsthandrum brakes, thisadvantagemustbebalancedagainstthedisadvantageofrequiring anoutboardwheelbearing. Analysisofthefoldedcone...
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Tài liệu Clutches and brakes design and selection P7 pdf

Tài liệu Clutches and brakes design and selection P7 pdf

... Inc. Beyondthispointthetorquedecreasesrapidly,asshownintheslip torqueversusspeedcurveinFigure13(a).ComparisonwithFigure13(b) correctlyimpliesthattheshapeofthedecreasing-torqueportionofthecurve totherightofthecriticalpointreflectsboththechangeinthehysteresisloop withincreasingtemperatureandtheheattransfercharacteristicsofthe coolingsystem(i.e.,whetherairorliquidandthetemperatureandvelocity ofth...
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Tài liệu Clutches and brakes design and selection P8 ppt

Tài liệu Clutches and brakes design and selection P8 ppt

... ! ¼6:344lb-ftð6-6Þ ¼76:130lb-in: wheren i =1/5.488fortheendrollersandn i =1/1.254fortheintermediate rollers. Ifthebrakehadbeenmountedoneitheroftheendrollershafts, equation(6-6)wouldhavebeenreplacedby T¼ 4:114 0:1553 " 2ð0:0759Þþ20ð0:000556Þð4:375Þ 2 þ 230 32:2 4:375 12  2 # ¼34:811lb-ftð6-7Þ andthebrakingtorquerequirementwouldhavebeenn=5.488timeslarger thanthatfoundbyequation(6-6).This...
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Tài liệu Clutches and brakes design and selection P9 ppt

Tài liệu Clutches and brakes design and selection P9 ppt

... 1 and 2 30j between detents 2 and 3 130j between detents 8 and 3 and that the angular separation between detent centers 1 and 5 is given by 25j between detents 1 and 2 30j between detents 2 and ... detents 3 and 4 40j between detents 4 and 5 130j between detents 1 and 5 The second instance occurs when balls 8 and 1 engage detents 1 and 5, where ball centers 8 and 1 a...
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Tài liệu Clutches and brakes design and selection P10 pdf

Tài liệu Clutches and brakes design and selection P10 pdf

... Inc. Thistypeofdriveisaninexpensivealternatetobevelgearsforaright- angledrive,aclutch,andareversingmechanism. Whentheright-handconeinFigure8ismoveddownwardtocontact theupperhalfofthedoubleconeandtheleft-bandconeismovedupwardto contactthelowerhalfofthedoublecone,boththeleft-andright-handcones rotateinthesamedirection.Iftheright-andleft-handconesdrivetheright- andleft-handwheelsofalawnmower,the...
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