Tài liệu Clutches and brakes design and selection P11 ppt
Tài liệu CLUTCHES AND BRAKES Design and Selection
... 301
References 316
Chapter 14 Engineering Standards for Clutches and Brakes 317
I. SAE Standards 317
II. American National Standards Institute (ANSI) 320
III. Other Standards Organizations 320
Bibliography ... according to the SAE J661 standard. Field perform-
Friction Materials 9
2
Band Brakes
Band brakes are simpler and less expensive than most other braking devices,
with shoe...
Tài liệu Clutches and brakes design and selection P2 doc
... pressure upon the lining.
Band Brakes 23
Copyright © 2004 Marcel Dekker, Inc.
2
BandBrakes
Bandbrakesaresimplerandlessexpensivethanmostotherbrakingdevices,
withshoebrakes,asperhapstheirnearestrival.Becauseoftheirsimplicity,
theymaybeproducedeasilybymostequipmentmanufacturerswithout
havingtopurchasespecialequipmentandwithouthavingtousefoundryor
forgingfacilities.Onlytheliningmustbepurchasedf...
Tài liệu Clutches and brakes design and selection P3 docx
... in lb, and the adjusting link is
Externally and Internally Pivoted Shoe Brakes 57
Copyright © 2004 Marcel Dekker, Inc.
V. DESIGN OF SINGLE-ANCHOR TWIN-SHOE DRUM
BRAKES
Internal shoe drum brakes ... Marcel Dekker, Inc.
3
ExternallyandInternallyPivotedShoe
Brakes
TypicalexternallyandinternallypivotedshoebrakesareshowninFigures1
and 2. In all but extremely rare designs, equal for...
Tài liệu Clutches and brakes design and selection P4 pdf
... Inc.
4
LinearlyActingExternalandInternal
DrumBrakes
Linearlyactingdrumbrakesarethosefittedwithshoeswhich,whenacti-
vated,approachthedrumbymovingparalleltoaradiusthroughthecen-
teroftheshoe.TypicallinearlyactingdrumbrakesareillustratedinFigures
1–3.
Analysisoflinearlyactingbrakesincludesthoseinwhichthecentrally
pivotedshoesareattachedtopivotedlevers,asinFigure1.Includingbrakes
ofthisdesignwithi...
Tài liệu Clutches and brakes design and selection P5 docx
... Inc.
5
DryandWetDiskBrakesandClutches
Thischapterondiskbrakesandclutcheswillconsiderannularcontactdisk
clutchesandbothcaliperandannularcontactdiskbrakes,asillustratedin
Figures1,2 ,and3 .
Caliper disk brakes, ... Airflex Division, Cleveland, OH.)
Dry and Wet Disk Brakes and Clutches 93
Copyright © 2004 Marcel Dekker, Inc.
used on large earth-moving equipment, on mine shuttle cars, a...
Tài liệu Clutches and brakes design and selection P6 ppt
... sin aÞð1-10Þ
Cone Brakes and Clutches 109
Copyright © 2004 Marcel Dekker, Inc.
II.FOLDEDCONEBRAKE
Prototypeconebrakeshavebeendesignedandtestedforarangeofvehicle
sizes,fromtractorsandtrailerstosubcompactautomobiles[1].Boththelarge
andsmallsizesusedafoldedconedesign,asillustratedinFigures 5and6 ,
eachwitha=27j.Althoughtheconebrakehasfewerpartsthandrum
brakes, thisadvantagemustbebalanceda...
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...
Tài liệu Clutches and brakes design and selection P8 ppt
... Inc.
Thekineticenergiesmaybefoundfrom
n
14
¼
1
16
n
24
¼
1
3:2
n
34
¼
1
3:2
m
1
¼1278m
2
¼276m
3
¼721m
4
¼231
r
1g
¼0:81r
2g
¼0:17r
3g
¼0:32r
4g
¼0:09
I
g1
¼m
1
r
2
1g
I
g2
¼m
2
r
2
2g
I
g3
¼m
3
r
2
3g
I
g4
¼m
4
r
2
4g
I
d
¼m
d
r
2
dg
ke
d
¼
1
2
I
d
n
2
14
ke
g1
¼
1
2
I
g1
n
2
14
ke
g2
¼
1
2
I
g2
n
2
24
ke
g3
¼
1
2
I
g3
n
2
34
ke
g4
¼
1
2
I
g4
wherem
1
throughm
4
arethemassesofgears1through4,...
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...
Tài liệu Clutches and brakes design and selection P10 pdf
... N
d1
l
d1
l
n1
tan
2
f and N
n2
¼
N
d
r
d2
r
n2
¼ N
d
l
d 2
l
n2
tan
2
f
ð3-1Þ
where r
d1
and r
nl
are the radii of the driver and driven cones, respectively, at
point 1, r
d 2
and r
n2
are driver and driven ... Inc.
setofunitstobeusedforeachratio,andtheresultingratiosareindependent
oftheunitsused.
Relativelybroadcurvesareshowninthefollowingcomputer-generated
graphsforeasyreadingtos...
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