entrega nº 2 trabajo de diseño ii

8/18/2019 Entrega Nº 2 Trabajo de Diseño II

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TRABAJO N° 2DISEÑO DE TRANSMISIÓN POR CORREAS Y POR CADENAS

Elaborado por:

MARIO ALBERTO OSSA MUÑOZDARIN !ERNANDO PANC"E CASTAÑO

Pro#$%or:L&bardo 'a($)a% U%$*+$

UNI'ERSIDAD TECNOLÓ,ICA DE PEREIRADISEÑO II

PEREIRA - RISARALDA2./2


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TABLA DE CONTENIDO

/0 I(1rod**&3( 44444444444444444444444440002

20 E((*&ado d$l probl$5a 4444444444444444444400402

20/ Da1o% )$($ral$%4444444444444444444444400006

60 Pro*$d&5&$(1o444444444444444444444444446

60/ D&%$7o d$ 1ra(%5&%&3( por *orr$a%4444444444444400008602 D&%$7o d$ 1ra(%5&%&3( por *ad$(a%44444444444444002.

80 Co(*l%&o($% 9 r$*o5$(da*&o($%44444444444444444000002

;0 R$#$r$(*&a% b&bl&o)ro 1&$($ *o5o #&(al&dad d$%arrollar $l d&%$7o d$ (a 1ra(%5&%&3( por *orr$a% 9 (a por *ad$(a% 5$d&a(1$ $l pro*$%o 1$3r&*o pla(1$ado $( $l l&bro d$ O*a5po ?/@ 9 d$%arrollado dra(1$

la *la%$ d$ D&%$7o II d$ la U(&$r%&dad T$*(ol3)&*a d$ P$r$&ra0

E%1$ pro*$%o %$ r$al&a d$ #or5a or)a(&ada 9 5$d&a(1$ (o% pa%o% a %$)&r r$*o5$(dado% por la l&1$ra1ra ad$5


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Fig 1. Esquema de la ta!smisi"! #2$

2.1 DATO% &ENERALE%

• M


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'.1 DI%E(O DE LA TRAN%MI%IÓN POR CORREA%

PA%O%)

/0 Po1$(*&a d$ d&%$7o20 T&po d$ *orr$a60 D&


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Ta-la 2.1' #1$

E( $%1$ *a%o %$ *o5o %$ 1ra1a d$ ( $(1&lador a&al 5o&do por ( 5o1or $l*1r&*o $l alor d$#a*1or d$ %$r&*&o $% d$ /=0

I()r$%


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•

correa convencional tipo C :{n1=1760 rpm Pd=40 h p

Fig 2.1/ +*!0e!+i*!al #1$

'. Dimet*s imiti0*s

D$ la 1abla 20=con los datos:{n1=1760 min

−1

Pd=40 hp

Ta-la 2. #1$

S$ ob1&$($ $l d&


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D1minrecomendado=6∈¿

D$ la 1abla 20 %$ ob1&$($( $l alor d$ d&


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D2=13∈¿

4. 5el*+idad ei67i+a

S$ pro*$d$ a *al*lar *o( la %&)&$(1$ $pr$%&3(:

V =π ∗ D1∗n

1

Do(d$ n1=1760min−1

V =π ∗7∈¿1760 min−1

∗1 ft

12∈¿3225 , 368 ft /min

El ra()o r$*o5$(dado para la $lo*&dad p$rr&*a d$ la pol$a *o(d*1ora $%:

2500 ≤V ≤7000 ft

min

Lo *al 5$%1ra F$ $l alor ob1$(&do $% a*$p1abl$0

8. Dista!+ia e!te +e!t*s

S$ r$*o5&$(da $%*o)$r $l 5a9or alor d$ la %&)&$(1$ $pr$%&3(:

A=max

( D

1+ D

2

2

+ D1

; D2

) A=max( 7+132 +7 ;13)

A=max (17 ;13 )=17∈¿

/. L*!gitud de la +*ea


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La $pr$%&3( F$ p$r5&1$ *al*lar $%1$ alor d$ lo()&1d pr&5&1&a $%:

L=2 A+π

2 ( D1+ D2 )+

( D2− D1)2

4 A

L=2∗17+π

2(7+13 )+

(13−7)2

4∗17=65 , 9453∈¿ G'alor pr&5&1&oH

Co( $%1$ alor %$ pro*$d$ a *al*lar la lo()&1d &(1$r&or a%:

∫¿= L−Constante detama o L¿

La *o(%1a(1$ d$ 1a5a7o $%1< $( #(*&3( d$l 1&po d$ *orr$a 9 para *orr$a% 1&po C %$ 1&$($ ( alor d$ 2K &(0

∫¿=65,9453in - 2,9 in =63,045338 in L¿

E%1a(dar&a(do $l (5$ro d$ *orr$a 1&l&a(do la 1abla 20; 9 ba%ado% $( la lo()&1d &(1$r&or %$

1&$($ (a *orr$a 1&po:C 68


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Ta-la 2.8 #1$

S$ ob%$ra F$ %$ $%*o)$ (a *orr$a d$ 5a9or lo()&1d &(1$r&or d$b&do a F$ a 5a9or lo()&1d5$(or %$r< $l d$%)a%1$ d$ la *orr$a0

Lon!it"d exterior est # ndar=72∈¿

Corr&)&$(do $l alor ob1$(&do %$ pro*$d$ a *al*lar la ($a lo()&1d pr&5&1&a

∫¿+Constante de tama o L= L¿


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L=68 in + 2.9 in =70,9 in GN$a lo()&1d pr&5&1&a *orr$)&daH

3. C*e++i"! de dista!+ia e!te +e!t*s

Para % d$1$r5&(a*&3( %$ 1&l&a la %&)&$(1$ #3r5la:

( D1+ D2 )4 L−2π ¿

¿¿2−32( D2− D1)

2

¿

4 L−2π ( D1+ D2 )+√ ¿ Acorre!ida=¿

Acorre!ida=4∗(70,9 )−2π ∗(7+13 )+√ (4∗(70,9 )−2π ∗(7+13 ) )

2

−32¿ (13−7 )2

16=19,5114∈¿

. P*te!+ia !*mi!al * +*ea

S$ 1&l&a:

P $C =[a( 10

3

V )0.09

− %

K d∗ D1−c( V 103 )

3

]∗V 10

3

D$ la 1abla 20/8 %$ ob1&$($( lo% #a*1or$% a b 9 *0

Ta-la 2.14 #1$


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Lo% alor$% ob1$(&do% %o(:

a=26,2

%=327,244

c=1,4859

E( $%1a $*a*&3( la po1$(*&a %$ da $( +p la $lo*&dad $( 5$1ro% por 5&(1o 9 lo% d&


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P $C =[26,2 ¿( 10

3

983,092)0.09

− 327,244

1,13∗7∗2,54−1,4859∗( 983,092103 )

3

]∗983,09210

3 =8 ,39627 hp

9. P*te!+ia !*mi!al +*egida * +*ea

Para *al*lar la po1$(*&a (o5&(al *orr$)&da por *orr$a %$ $5pl$a:

P $CC = P $C ∗ K L∗ K &

K L : Factor de correcci ' n por lon!it"d de la correa ( ta%la2.17 )=0.85

Ta-la 2.13 #1$

K & : Factor de correcci ' n del # n!"lo de contacto

Para *al*lar $%1$ #a*1or %$ d$b$ 1$($r la %&)&$(1$ r$la*&3(:

19,5114∈¿=0.307513

13∈−7∈¿¿ D

2− D

1

A =¿


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Co( $%1$ alor %$ 1o5a d$ la 1abla 20/ $l alor para K &

Ta-la 2.1/ #1$

Ob1$(&$(do K &=0.96

Apl&*a(do la $*a*&3( para la po1$(*&a (o5&(al *orr$)&da por *orr$a %$ 1&$($:

P $CC =8.3962∗0.85∗0.96=6 ,8513hp

1:. Cl+ul* del !;me* de +*eas

E%1$ alor %$ ob1&$($ apl&*a(do la %&)&$(1$ $*a*&3(:

$ ( correas=

Pd

P $ CC =

40

6.8513=5 ,83831

S$ $l&)$ 1o5ar *orr$a% dado F$ %& %$ d&%5&(9$( $l (5$ro d$ *orr$a% %$ a*or1a la &da 1&l d$la 1ra(%5&%&3(0

11. %ele++i"! de *leas < ma!guit*s

Co5o %$ ($*$%&1a (a pol$a *o( ra(ra% %$ b%*a $( $l *a1


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Catl*g* B*=!i!g aa *leas #'$

Para $l d&


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Ta-la N>2 +atl*g* B*=!i!g

D&*+o% alor$% %$ $(*$(1ra( $( lb# 9 al pa%arlo% a (&dad$% d$l %&%1$5a &(1$r(a*&o(al GNH %$ob1&$($:

P$%o pol$a /: 2 lb# //; NP$%o pol$a 2: 8 lb# 62K6 N

Ta5b&( $( $%1a 1abla %$ ob1&$($ $l alor d$l a(*+o d$ la% pol$a%:


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Pol$a *o(d*1ora: L 2 1

16 &( ;.6=; 55

Pol$a *o(d*&da: L 3 3

4 &( K;2; 55

A+ora para d$1$r5&(ar lo% 5a()&1o% %$ 1o5a( la% r$#$r$(*&a% d$ la% pol$a% 9 %$ b%*a $( la1abla N°2 d$l *a1


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Ta-la N>2 +atl*g* B*=!i!g #'$

S$ ob%$ra F$ para $l $>$ d$ la pol$a *o(d*1ora $&%1$ 5a()&1o S! 5&$(1ra% F$ para $l


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El


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Ta-la 2.9 #1$

&on este valor se obtiene #:

# 6.22 .

R$$5plaa(do %$ 1&$($:

F 1

F 2


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F

(¿¿1− F 2)∗ D12

=+

F 1

F 2

=4,27 ¿

Do(d$ T =.K;2 N5 9 D

1=7∈¿0,0254 m

R$%ol&$(do $l %&%1$5a d$ $*a*&o($% %$ ob1&$($( !/ 9 !2:

F 1 //=K. N F 2 2=8 N

La #$ra d$ 1$(%ado G F

0 H %$ *al*la a%:

F 0= F

1+ F

2

2=

1189,07+278,472

=733,77 $

Para $l *$ %$ %a la %&)&$(1$ $*a*&3(:

F -=√ ( F 1+ F 2)2+. 2

Do(d$ $% la %5a d$ lo% p$%o% d$ la% pol$a% / 9 20

El p$%o d$ la pol$a / 9 2 %$ $(*$(1ra *o( la d$%&)(a*&3( d$ la pol$a% $( la% 1abla% / 9 2 d$ %1o* %+$a$ l&%1&() d$l *a1


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. 2= peso man!"ito 2+ peso polea 2=329,3 $ +62,16 $ =391,46 $

(1189,07+278,47)2+131,242=¿1482,36 $ F - 1=√ ¿

(1189,07+278,47)2+391,462=¿1527,55 $ F - 2=√ ¿

'.2 DI%E(O DE TRAN%MI%IÓN POR CADENA%

PA%O%)

/0 N5$ro% d$ d&$(1$% d$ la% $%1r$lla%20 '$lo*&dad #$ra p$rr&*a 9 #$ra p$rr&*a $F&al$(1$ por +&l$ra

60 Pa%o 1$(1a1&o80 D&%1a(*&a $(1r$ *$(1ro%;0 S$l$**&3( d$ la% $%1r$lla%0 !$ra%0 M$d&da%

1. N;me* de die!tes de las estellas

La r$la*&3( d$ 1ra(%5&%&3( %$ d$1$r5&(3 $( a(


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Ta-la './ #1$

/ 1=¿ 2; a 2 para 2≤ ic ≤ 3

S$ $%*o)$ ( (5$ro d$ d&$(1$%/

1=¿ 2

A+ora *o( la r$la*&3( d$ 1ra(%5&%&3( %$ d$%p$>a $l (5$ro d$ d&$(1$% d$ la $%1r$lla )ra(d$ *o( la%&)&$(1$ $pr$%&3(:

/ 2=ic∗/ 1

/ 2=2∗26=52

S$ d$b$ $r&*ar $( la 1abla 60 $l (5$ro 5


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Ta-la '.3 #1$

S$ ob%$ra F$ $l l5&1$ d$ rp5 $% %p$r&or a .. 5&( / para *alF&$r alor d$ pa%o d$ la*ad$(a alor 59 %p$r&or a la $lo*&dad d$ la $%1r$lla p$F$7a G6. 5&(/H0

2. 5el*+idad 6ue@a ei67i+a < 6ue@a ei67i+a equi0ale!te * ilea

La d$1$r5&(a*&3( d$ la $lo*&dad p$rr&*a %$ r$al&a 5$d&a(1$:

' / 1∗n1∗ p

Do(d$n1 $% la $lo*&dad d$ ro1a*&3( d$ la $%1r$lla p$F$7a 9 p $% $l pa%o d$ *ad$(a0

Co5o (o %$ *o(o*$ $l pa%o d$ la *ad$(a %$ d$>a &(d&*ado

' 2 6. 5&( / 1 min

60 s p G/; %/H p

La #$ra por d$#&(&*&3( $%:

! P

V do(d$ P $% la po1$(*&a *o(%5&da $( la 1ra(%5&%&3( 9 ' la $lo*&dad p$rr&*a0

F =7,5

hp∗7460 010 hp

(156 s−1)∗ p=

35,8654 $m

p

3656,91 k!f ∗mm

p


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n1=360 min−1

Para *al*lar %$ 1&$($:

V / 2 6

V / Gd$p$(d$ d$l 1&po d$ *ar)aH: {1; no ha cho1"es1,2 a 1,4 ;cho1"es

V 2 Gd$p$(d$ d$l 1&po d$ lbr&*a*&3(H: { 1; contin"a1,3 ; por !oteo

1,5 ; periodica

V 6 Gd$p$(d$ d$l (5$ro d$ >or(ada%H: { 1 ;"na 2ornada

1,25 ; dos 2ornadas

1,45 ; tres 2ornadas

Ba%ado% $( lo a(1$r&or %$ $%*o)$(: V / /6 G*+oF$% 5od$rado%HV 2 /; Glbr&*a*&3( p$r&3d&*aHV 6 /2; G2 >or(ada% d&ar&a%H

Por 1a(1o:

V /6 /; /2; 286;

D$ la 1abla 60= %$ ob1&$($ $l alor d$ ? ´ p @ d$p$(d&$(do d$ la $lo*&dad (/ 9 $l pa%o d$ la

*ad$(a0 Co5o (o %$ *o(o*$ a( $l pa%o d$ la *ad$(a %$ a%5$ ( alor *o(%$ra1&o par $%1a 9%$ a5$(1a d&*+o alor $( ( 6;W por 1ra1ar%$ d$ *ad$(a% d$ al1a $a*1&1d 9 $l$adar$%&%1$(*&a0


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Ta-la '. #1$

? ´ p¿ 2/. )X552 /6; 2=6; )X552

k 4: esi!"ala1−1,7−2,5−3,3 para "na , dos , tres c"atro hileras respectivamente

A+ora %$ *al*la( 8 pa%o% 1$(1a1&o%:

p={22,4283 mm;sih=118,7923 mm;sih=216,5253 mm;sih=315,0646 mm;sih=4

5aia-le E+ua+i"! ta-laPas* de la +ade!a #mm$123: 18 19:8 284

r$a (o5&(al d$ 1raba>oAr ?552@

Tabla 60/?/@ 88 . /.; /

!$ra $F&al$(1$ por +&l$ra !$+ ?V)#@ /

F e h=3656,91k!f ∗mm

p 2== 26/ /K2 /86

2 F e h=

2151,12k!f ∗mm p

/K /6; //6 =;


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6 F e h=1462,76k!f ∗mm

p //; K2 ;=

8 F e h=1108,15k!f ∗mm

p = . ;= 88

Pr$%&3( $%p$*&*a ´ p

?)#X552@

/´ p=k

F eh

Ar=

2,4375∗ F e h A r

/;K; =.8 88 /K

2 K6 8. 22 //6 6 62. /= .=.8 8=2 288 /6; ./

Pr$%&3( $%p$*&*a

p$r5&%&bl$ ? ´ p @

?)#X552@

Tabla 60=?/@ a5$(1ado 6;W 2=6; 2=6; 2=6; 2=6;

Car)a 5$d&a d$ ro1ra Q?)#@

Tabla 60/?/@ /=/. 2=8. 6=;. ;=.

Co$#&*&$(1$ d$ %$)r&dad N

/ $ = 3

K 1 F e h

= 31,3∗ F e h

8=6 K8; /;82 6;6K

2 =28 //= 22/ ;K;86 /2// 268 6=8 =28 /.. 6/2/ ;/. //;.6

Co$#&*&$(1$ d$ %$)r&dad p$r5&%&bl$ ?N@

Tabla 60/.?/@ =; =; K6 K6

D&%1a(*&a $(1r$ *$(1ro A?55@

A 6.p p /K.; 55 6=/ 8 ;2 2

N5$ro d$ $%labo($% L p

/

(¿¿2−/ 1)2

4 π 2( A / p)

L p=2 A

p + / 1+/ 2

2+¿

KK22= $(1o(*$% l p /..

N5$ro d$ )olp$% por %$)(do U ?%/@

U G(/?rp5@HGZ/HXG/;L pH 28

N5$ro d$ )olp$% p$r5&%&bl$ ?U@ ?%/@

Tabla 60K?/@ . ;. 6; 6.

Co5o %$ *$(1a *o( (a r$%1r&**&3( $( la d&%1a(*&a $(1r$ *$(1ro% %$ $l&>$ (a *ad$(a ANSI .2Gpa%o /K.; 55 9 2 +&l$ra%H0

4. Dista!+ia e!te +e!t*s.

S$ pro*$d$ a *al*lar la d&%1a(*&a $(1r$ *$(1ro% $( pa%o% a%:

A p=

l p− /

1+/

2

2+

√( / 1+/ 22 −l p)

2

− 2

π 2 (/ 2−/ 1 )

2

4


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%*+ets AMEC N> /: Pas* J i! K19:8 mm #8$

/. Fue@as

!/ ! ! p !2 ! p !* !E 4 !/ !2

Do(d$ ! $% la #$ra p$rr&*a ! p $% la #$ra d$ pa(d$o !* $% la #$ra *$(1r)a 9 !E $% la#$ra %obr$ $l $>$0

F c=1∗h∗V 2

! F p=

1∗h∗ A corr2

8∗5 max

Do(d$:

! #$ra p$rr&*a /=82=2 )# F p$%o d$ la *ad$(a por (&dad d$ lo()&1d /;. )#X5 + (5$ro d$ +&l$ra% 2' $lo*&dad 2K/= 5X%A*orr .;. 5Y5a ..//;/2 5

E(1o(*$%:


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F c=2,7 K!f

F p=10,58k!f

F 1= F + F p=184,282 k!f +10,58 k!f =194,86 k!f

F 2= F p+ F c=10,58 k!f +2,7k!f =13,28 k!f

F -= F 1+ F 2=194,86 k!f +13,28 k!f =208,14 k!f

3. Medidas

Lo% d&


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• Dra(1$ $l d&%$7o %$ d$b$( *al*lar d$r$(1$% alor$% d$ ar&abl$% F$ %$ d$b$(

$%1a(dar&ar $%1o *o( $l #&( d$ a%$)rar%$ d$ F$ dra(1$ $l 5o(1a>$ la% p&$a%($*$%ar&a% %$ $(*$(1r$( a (&$l *o5$r*&al0

• La% 1ra(%5&%&o($% por *orr$a% 9 por *ad$(a% p$r5&1$( 1ra(%5&1&r 5o&5&$(1o 9 po1$(*&a

$(1r$ $>$% F$ %$ $(*$(1ra( a lar)a% d&%1a(*&a% lo *al la% +a*$ %p$r&or$% a o1ra%

#or5a% d$ 1ra(%5&%&3( $( $%1$ a%p$*1o %&( $5bar)o 1&$($( al)(a% d$#&*&$(*&a% $(1r$ la%F$ %obr$%al$ $l (o p$r5&1&r (a r$la*&3( d$ 1ra(%5&%&3( 1o1al5$(1$ *o(%1a(1$ lo *al (ola% +a*$ 3p1&5a% $( apl&*a*&o($% d$ pr$*&%&3(0

• El 5a(1$(&5&$(1o d$ la 1ra(%5&%&3( por *orr$a% $% *a%& (lo 9 %$ l&5&1a $( la 5a9ora

d$ lo% *a%o% a 1$5plar la% *orr$a% o *a5b&arla% d$ %$r ($*$%ar&o0 Por % lado la%1ra(%5&%&o($% por *ad$(a% %o( $( $%1$ a%p$*1o 5$% d$ 1ra(%5&%&3( $% ( pro*$%o

*r*&al para $l d&%$7o 9a F$ $%1a% %o( 1&l&ada% $( a(

entrega nº 2 trabajo de diseño ii

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