LECTURE 10 ver 1.0.ppt

7/17/2019 LECTURE 10 ver 1.0.ppt

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Copyright2007 by Prof. Madya Ir. Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! $

%.2! #&N'MIC C'P'CI(& of )E'*IN+S ,ontinu!-

fc a fator hih d!p!nd" on th! unit" u"!d1 th! g!o!try of th! b!aring

opon!nt"1 th! auray hih th! 3ariou" b!aring part" ar! ad! and th!

at!ria4 u"!d

,3a4u!" offc i" d!t!rin!d by u4tip4ying th! 3a4u!fc/ fin th! (ab4! b!4o 5

a" an !6ap4! ,"our! SKF

Single row radial contact, single & double

row angular contact groove ball bearings

Double row radial contact

groove ball bearings

Self aligning ball

bearing0.05 0.476 0.451 0.176

0.06 0.500 0.474 0.190

0.07 0.521 0.494 0.20

!!. !.. !. !.

0." 0.510 0.4"4 0.41"

0.40 0.492 0.467 0.412

m

b

d

d o" ffc

8h!r!1 f $0 h!n 9g : unit" ar! u"!d

f 2;.


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Copyright2007 by Prof. Madya Ir. Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! 2

vi.b. Rating Life,LR 5 th! agnitud! ofLRfor *adia4 and

'ngu4ar Contat )a44 )!aring" ,!6!pt fi44ing "4ot b!aring"

an b! d!t!rin!d by1=

=

EL

RP

CL 8h!r!1 C )a"i Load *ating

PEL th! E>ui3a4!nt LoadMi44ion r!3o4ution"1

vi.c. Equivalent Load,PEL 5 th! agnitud! ofPELfor *adia4 and

'ngu4ar Contat )a44 )!aring ,!6!pt fi44ing "4ot b!aring"

an b! d!t!rin!d by1

arEL YFXVFP += 8h!r!1X radia4 fatorY thru"t fator

Fr radia4 4oad

Fa thru"t 4oad

V rotation fator


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Copyright2007 by Prof. Madya Ir. Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! =

vi.c. Equivalent Load,PEL 5 ,ontinu!--'N#1 th! 3a4u!" ofX1 V: Y an b! a" b!4o.

(h! fator ? i" du! to th! 4a9 of "uffii!nt

!6p!ri!nta4 !3id!n! and u"!d a" a att!r

pr!aution.

8h!r!1

C0 th! "tati )a"i Load *ating

eVF

F

r

a

use X $ : Y 0

IF for Sing4! *o )!aring"

Table "our! SKF


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Case Study 1

8hat i" th! appro6iat! frition po!r 4o"" in a "ing4! ba4 b!aring ha3ing a bor!

dia!t!r of @@ and "ubA!t!d to a radia4 4oad of 229NB (h! "haft rotat!" at

u!1

Frition Po!r Lo"" ( ) WNMt @7


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Case Study 2

#!ri3! Strib!9" E>uation for th! Stati Capaity of a "ing4! ro radia4 d!!p groo3!

ba44 b!aring1 a""uing rigid ra!" and !>ua44y "pa!d ba44". '4"o1 d!t!rin! th!

a6iu 4oad on a ba44. E6pr!"" th! r!"u4t in t!r" of th! dia!t!r dbof th! ba44" and

th! nub!r of ba44" ,Z.Solution

a. (h! radia4 4oad Coi" ba4an!d by th! 3!rtia4

opon!nt" of th! for!" ating on th! ra! through

th! ba44" in th! 4o!r ha4f of th! b!aring1

.........2o"2o"2 =2$ +++= FFFCob. ' "!ond on"id!ration i" obtain!d fro d!f4!tion

r!4ation. (h! radia4 d!f4!tion at 4oadF1i" $1 that at4oadF2i" 21 !t-1 h!r!by1

2o"1o" $=$2 == a" "o on-.

Co

F1

F2

F2

F3 F3

. (h! r!4ation of d!f4!tion" : 4oad" i" gi3!n a" b!4o

hih i" 3!rifi!d by D!rt Str!"" E>uation"1

2=

=

2=

$

=

$

2=

2

2=

$

2

$ 1

==

F

F

F

Fa" "o on-.


6/14

Copyright2007 by Prof. Madya Ir. Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! u! : +!o!try

fk $.0 $.= ,r!o!nd!d by SKF

fd $.0 =.0 ,r!o!nd!d by SKF

FFFeff %@.$@.$,=.$, ==

!

Fr%2&2NFr % '&(N T2$ 424%

(h! f4at b!4t dri3!" a fatorfkto ta9! ar! both th! dynai !ff!t and th!

additiona4 for! n!!""ary to aintain th! prop!r t!n"ion in th! b!4t 3ari!" fro

2.@ =.0. (DUS1 4!t" u"! fk 2.@ for th! b!4t.

(DE*EF*E1 th! !ff!ti3! b!4t for! 2.@ 6 F

T1$ 1,060%


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Case Study 3 ,ont-

(DE*EF*E1 th! For!" to b! u"!d in th! a4u4ation" ar!

Eff!ti3! (ang!ntia4 For! on th! +!ar1 Ft $.%@,


12/14Copyright2007 by Prof. Madya Ir. Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! $2

Case Study 3 ,ont-

&ou ar! r!>uir!d to "!4!t a prop!r

"ing4! ro1 d!!p groo3! ba44

b!aring" in ith th! gi3!n d!"ign of

th! "haft in t!r" of "tr!ngth1

ritia4 "p!!d and rigidity a" !44 a"

ith 3ariab4! "tr!""!"..

#$120% T

1$1,060%

# $ 120%

150 150 150

?!rtia4 For!" ,N

D

D2D

!

Fr%2&2NFr % '&(N T2$ 424%

52% 120%

67% 1,4"4%Dorionta4 For!" ,N

Eff!ti3! Dorionta4 For!" ,N

Eff!ti3! ?!rtia4 For!" ,N472%

1,242% ,710%

120%

''($466)

''*$6,1"6)

'+($226)

'+*$1,24)


13/14Copyright2007 by Prof. Madya Ir. Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! $=

=

= EL

RP

C

L

Case Study 3 ,ont-

Sp!ifi dynai apaity ,C r!>uir!d for !ah b!aring i"1

L!ft b!aring 8h!r!1 PELRL1 th!n $1=@0 ,C/$12@@=

thu"1 C4!ft $=1H70N=

=

EL

RP

CL*ight b!aring 8h!r!1 PELRR1 th!n $1=@0 ,C/


14/14Copyright2007 by Prof Madya Ir Muhidin/FK/UNISEL Mahin!" #!"ign/L!tur! $0/ Pag! $;

Case Study 3 ,ont-

Bearing Basic DynamicCapacity (C) N

Min. Shaft

shoulder (mm)Inner Race Max.

(mm)

Bore (mm) utside

(mm)

6411 76,500 66 "1.5 55 140

6412 ",000 71 "".1 60 150

61 71,000 76 "". 65 140

' "ii4ar ana4y"i" for th! right b!aring11 ith th! "haft dia!t!r 2#

LECTURE 10 ver 1.0.ppt

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