Clutch
Tài liệu CLUTCHES AND BRAKES Design and Selection
... One-Way, and Detent Clutches 191I. Centrifugal Clutches 191II. One-Way Clutch: The Spring Clutch 197III. Overrunning Clutches: The Roller Clutch 199IV. Overrunning Clutches: The Sprag Clutch 206V. Torque ... Eddy-CurrentBrakes and Clutches 125I. Theoretical Background 126II. Magnetic Particle Brakes and Clutches 130III. Hysteresis Brakes and Clutches 132Contentsx
IV. Eddy-Current Brake...
Clutches and brakes design and selection P1
... flexibleenoughtobewovenandprocessedastextiles,soKevlarbrakelinings andclutchfacingsareavailableineitherwovenornonwovenforms.Theyare usedalongwithproprietarypolymerbindersinthemanufactureofbrake liningsandclutchfacingsforbothwet(oilbath)anddryclutchapplications. ... ,whichexplicitlyshowsthephysicalquantities involved,asinFigure3. Thesecondrelationthatmaybeusedbybrakeandclutchlining manufacturer...
Tài liệu Clutches and brakes design and selection P4 pdf
... Inc.
sothebrakingtorquebecomes
T¼Ap
max
r
2
w
Z
u
2
u
1
cosudu¼Ap
max
r
2
wðsinu
2
Àsinu
1
Þð1-4Þ
IndesignsdifferentfromthoseshowninFigure1itmayprove
convenienttohavetheshoepivotedaboutapointataradialdistanceRon
theaxisofsymmetry,suchaspointAinFigure4.ThemomentM
p
duetothe
pressureontheliningiszeroaboutpointAbecauseofthesymmetryofthe
shoeaboutthispoint.NosuchsymmetryexistsforthefrictionmomentM...
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)wefindthatforthepressuredistributiongi...
Tài liệu Clutches and brakes design and selection P6 ppt
... friction
coefficients, A, indicated.
Cone Brakes and Clutches 119
Copyright © 2004 Marcel Dekker, Inc.
Example3.3
Calculatethechangeintorqueandintheliningpressureduetowearforthe
clutchinExample3.1andthebrakeinExample3.2forliningthicknessesof
0.125in.andliningwearof0.05in.LetyinFigure9representthethickness
thathasbeenwornaway.Considerthatliningwearmaybeaslargeas0.5
mmfortheclutchinExample3.1an...
Tài liệu Clutches and brakes design and selection P7 pdf
... Inc.
SimplatrolDanaproducesasmall-capacity(under8oz-in.)unitde-
signedtohaveanadjustabletorquerangeandtousetheconstructionsim-
ilaritiesbetweeneddy-currentandhysteresisbrakes/clutches.InittheIMand
OMarereplacedbyapermanent-magnetdiskandeitheraneddy-currentor
hysteresisdisk.Torquecapacitymaybeadjustedbymeansofthefluxgate
placedbetweenthem,asshowninthebrakeversioninFigure18.Manual
rotationofthefl...
Tài liệu Clutches and brakes design and selection P8 ppt
... the
brake or clutch. Although the energy considerations are independent of the
particular brake /clutch design involved, the resulting formulas may be used to
compare various brake /clutch design ... Inc.
Finally,afterexpansionoftheexponentialinequation(3-14)accord-
ingto
e
x
À1¼xþ
x
2
2!
þ
x
3
3!
þ
x
4
4!
þ:::
andsettingx=ct
2
/J,weseethat,ifcissmallenoughforc
2
tobenegligible
comparedtoc...