do an chi tiet may 3

8/2/2019 do an chi tiet may 3

1/52

O AN CHI TIET GVHD : DIP BO TR

Trang 1

CHNG I: CHN NGC V PHN PHI T S TRUYNA.Chn ng c:

-Chn ng c din xoay chiu khng ng b ba pha kiu lng sc loi ny c u im:tin ch , kinh t , cu to v vn hnh n gn; mc trc tip vo mng in xoay chiu

khng cn bini dng in.Cng sut lm vicca my khuy : 6kw

S vng quay trc u ra : n=90(vng/pht)Tnh cng sut nh mc ca ng c in ln hn hoc bng cng sut ti.

lv

c

NN (2.1/trang 27 sch thit k chi tit my)

Trong : khopnoirnbllai

3

/

3

Tra bang 2-2 trang 27

95,0ai

99,0olan

96,0/

rangb

1khopnoi

Vy : 815,0195,0 96,099,033

Nn: 361,7815,0

6

NNm ( kw)

-S vng quay s b ca ng c:

iinn

n

nhopaisobo

sobo

aura

uvao nin

n

i

Tra bng 2-2 trang 32

iai=2

ihop=8

14408290 nsobo (vng/pht)

Da vo nhn tham s tnh ton trn ta tra bng 2P trang 322 ta chnc ng c

Kiu ng c : AO2 514

kwkw NN mc 32,75,7

Nc=1460 (vng/pht) > ns b =1440 (vng/pht)

4,1M

M

m

m

2max M

M

m

8,0min

M

M

m

Hiu sut ng c :88,5 %


2/52


Trang 2

B.Phn phi t s truyn:

T s truyn ng chung :

22,1690

1460

n

n

r

ci

Trong :ii hopaii

11,82

22,16

ii

a i

hop

i

M iii chamnhanhhop (*)

Da vo s hp s di y ta chon cng thc linhgia inhanh v ichm .

S A:

Theo s a, V l bnh rng 2 cp nn ta chn cng thc (trang 31)

Inhanh=(1,21,3)ichm (inhanh > ichm)

y ta chn inhanh=1,2ichm (**)

Theo phng trnh (*) v (**) ta c h phng trnh:

ii

ii

chamnhanh

chmnhanh

2,1

11,8

Gii h phng trnh trn ta c:

599,2

12,3

i

i

cham

nhanh

t:

ii

ii

chm

nhanh

23

12

1.S vng quay cc trc:

Trc 1: 7302

14601

i

nn

d

c (vng/pht)

Trc 2: 97,23312,3

730

12

1

2

i

nn (vng/pht)

Trc 3: 02,9059,2

97,233

23

2

3

i

nn (vng/pht)

2.Cng sut cc trc:

Trc 3: 06,699,06

3

khopnoiolan

lamvietNN (kw)


3/52


Trang 3

Trc 2: 37,69504,0

06,6

/

3

2

rangbolan

NN (kw)

Trc 1: 7,69504,0

37,6

/

2

1

rangbolan

NN (kw)

3.Mmen cc trc :

6,392461460

655,955,9 101066

n

NT

c

lamvietc

(Nmm)

7,87650730

7,655,955,9 10106

1

1

6

1

n

NT (Nmm)

6,260005

95,233

37,655,955,9 10106

2

2

6

2

n

NT (Nmm)

5,64289002,90

06,655,955,9 10106

3

3

6

3

n

NT (Nmm)

Trc

Thng s

Trc ng c I II III

i i=2 i=3,12 i=2,59

n (vng/pht) 1460 730 233,97 90,02

N(kw) 7,5 6,7 6,37 6,06

T(Nmm) 39246,6 87650,7 260005,6 642890,5


4/52


Trang 4

Chng 2: THIT K B TRUYN AI1. Chn ai thang.Gi thit vn tc ca ai V>10m/s v do khng c yu cu c bit no nn c th ta dngloi ai A hoc b khi cng sut truyn 7,5 kw.a) Kch thc ai:

a

h0

h

a0

Kch thc tit din ai A v b c tra theo bn (5_11/trang 92)

Cng thc tnh A b

1

2

3

Tra bng 5_11/trang 92.Kch thc tit din ai: a h (mm)Din tch tit din ai: F (mm2)

ng knh bnh ai nh: tra theo bng5_14/trang 93. D1 (mm)Kim nghim vn tc ca ai:

V= = (m/s)

V


5/52


Trang 5

4

5

6

7

8

n1= nc D1/D2 (1 )

So snh n1 vi n1: n1=

= =0,02 (3 5)%

Tha mn t s truyn thc t:nc/n1= 1460/715,4= 2,04

Chn s b khong cch trc A theo bng5_16/trang 94: A=1,2D2 (mm)

Tnh chiu di ai L theo khong cch trc As b t cng thc (5_1/trang83)

L=2A+ (D2+D1)+

Ly L theo tiu chn. Tra bng 5_12/trang 92Kim nghim s vng chy u trong 1s: (5-20/trang 94)

u= Umax10

u nh hn umax= 10Xc nh chnh xc khong cch trc A theochiu di L, ai ly theo tiu chun(cngthc 5_2/trang 83):

A=

Khong cch A tha mn iu kin 5_19/trang94..

0,55(D1 +D1)+hA2(D1 +D1)Khong cch nh nht, cn thit mc ai:

Amin= A 0,015L (mm)

Khong cch ln nht, cn thit to lc cng: Amax= A + 0,03L (mm)

Tnh gc m 1 (cng thc 5_3/trang83)

1=1800

570

Gc m tha mn k: 1 1200

(trang 94)

Xc nh s ai Z cn thit. Chn ng sutcng banu 0= 1,2 N/mm2

(trang 95) v

theo tr s D1tra bng 5_17/trang 95 tm c

n1 = 1460 (1 0,02)

=715,4

1,2 280= 336

2 336+ (280+140)+

= 1346

1320

= 8,1

322,7

164,5322,7560

322,7+0,15 1346

= 302,5

322,7+0,03 1346= 363,08

1800

570= 155,27

n1 = 1460 (1 0,02)

=715,4

1,2 400= 480

2 336+ (400+200)+

= 1643,7

1600

= 9,6

313

230,5313800

3130,15 1600= 289

313+0,03 1600= 361

1800

570=143,57


6/52


Trang 6

9

10

ng c ch cho php [ p]o N/mm2

Cc h s:

Ct: H s xt n nh hng ca ch titrng. Tra bng 5_6/trang 89-90.

C : H s xt n nh hng ca gc m. Tra

bng 5_18/trang 95.Cv: H s xt n nh hng ca vn tc. Tra

bng 5_19/trang 95S ai tnh theo cng thc 5_22/trang 95.

Z

Ly s ai ZXc nh cc kch thc t, S, h0. Tra bng10_3/trang 257

Xc nh chiu rng bnh ai (tnh theo cngthc 5_23/trang 96)

B= (Z 1)t + 2S

ng knh ngoi cng ca bnh ai tnh theocng thc 5_24/trang 96.Bnh dn: Dn1=D1 + 2h0Bnh b dn: Dn2=D2 + 2h0

Tnh lc cng ban u S0theo cng thc5_25/trang 96 v lc tc dng ln trc R theocng thc 5_26/trang 96.

S0= 0F (N)

R= 3S0Zsin (N)

1,7

0,9

0,86

1

= 6,6

7

t= 16

S= 10

h0= 3,5

(7 1) 16 + 2 10= 116

140 + 2 3,5= 147

280 + 2 3,5= 287

1,2 81=97,2

3 97,2 7 sin

= 1606,17

1,74

0,9

0,89

0,94

= 2,6

3

t= 20

S= 12,5

h0=5

(3 1) 20 + 2 12,5= 65

200 + 2 5= 210

400 + 2 5= 410

1,2 138=165,6

3 165,6 3 sin

= 677,14

Kt lun: Chn phng n dng b truyn ai loi A c khun kh nh gn hn tuy chiu rngbnh ai v lc tc dng ln trc ln hn mt t so vi phng n dng ai loi b.


7/52


Trang 7

CHNG III :THIET KE BO TRUYEN BANH RANG(tra sch tnh ton thit k h dn dng c kh)

I:Thit k b truyn bnh rng trrng nghin (cp nhanh):

1.Cc thng s bnh dn:

+Momen xon T1=87650,7(N.mm)

+T s truyn i12=3,12

+s vng quay n1=730 (v/p) tui th Ln=5000

+Ti trng thay i theo bc T1=T ; T2=0,5T ; T3=0,75T

V t1=0,4tck ;t2=0,3tck ; t3=0,3tck

Do b truyn kn nn ta chn thit k theo ng sut tip.

2.Chn vt liu:

+Bnh nh: thp C50 ti ci thin cng t HB1=255 ; MPabl 800 ;MPach 530

+Bnh ln: thp C45 ti ci thin cng t HB2=240 ; MPabl 750 ;MPach 450

3.S chu k lm vic c s:

1025574,24,2

11 79,13030 HBNHO chu k (6.5/trang 93)

1024074,24,2

22 55,13030 HBNHO chu k

106

21 4 NN FOFO chu k

4.S chu k lm vic tng ng xc nh theo s ti trng:


8/52


Trang 8

t

T

Tt

T

Tt

T

Ttn

T

TN

mmm

i

m

c

HHHH

iiHE 3

2

2

2

1

22 75,05,0730160

max

60

(6.7/trang 93)

Trong : Ti, ni ,ti ln lt l momen xon, s vng quay v tng s gi lm vic ch i.

LtLtLLt

ttm nnnn

ck

ck

H

3,0;3,0;4,04,0

;6321

1075,05,01 83331 97,180003,03,04,0730160 NHE chu k

V i12=3,12 108

12

1

263,0

i

NN

HE

HE chu k

t

T

Tt

T

Tt

T

Ttn

T

TN

mmmi

m

c

HHHH

iiFE 321

75,05,0730160

max

60

(6.8/trang 93)

1075,05,01 86661 6,180003,03,04,0730160 NFE chu k

V i12=3,12 108

12

1

251,0

i

NN

FE

FE chu k

T mc 3,4 ta c:

NNNN HOHEHOHE 2211 ;

NNNN FOFEFOFE 2211 ;

12121 KKKK FLFLHLHL

A. ng xuat tiep xuc cho phep :

KKZZS

HLXHvr

H

H

H

0

lim (6.1/trang 91)

Vi: Zr:H s nhm b mt rng.

Zv:H sxt n nh hng ca vn tc vng.

ZXH:H s xt n nh hng can kch thc bnh rng.

S b ta c: Zr.Zv.KXH=1 (trang 92)

-ng sut tip xc cho php trn bnh rng nh:


9/52


Trang 9

5807025527020

1lim HBH (MPa) (bng 6.2/trang 94)

-ng sut tip xc cho php trn bnh rng ln:

5507024027020


SH:h s an ton khi tnh v tip xc: SH=1,1 (bng 6.2/trang 94 )

- 121 KK HLHL :H s tui th:

27,5271,1

158010

1lim

1

S

K

H

HLH

H

(MPa)

5001,1

155020

2lim

2

S

K

H

HLH

H

(MPa)

500,min 21min HHH (MPa)

62525,164,5132

50027,527

2 min21

HMPa

HH

H(MPa)

(tha)

-ng sut tip xc cho php khi qu ti.

14845308,28,2 11max chH (MPa) (6.13/trang 95)

12604508,28,2 22max chH (MPa)

B.ng sut un cho php:

KKKYYS

FLFCXFSR

F

F

F

0

lim (6.2/trang 91)

Vi: YR:H sxt n nh hng ca nhm b mt ln chn rng.

YS:H s xt nhy can vt liu i vi tp trung ng sut.KXF:H s xt nkch thc bnh rngnh hng n bn un.

KFC:H s xt n nh hng khi t ti.

S b ta c: YR.YS.KXF=1 vi KFC=1 (trang 92)

-ng sut uncho php trn bnh rng nh:

4592558,18,1 10

1lim HBF (MPa) (bng 6.2/trang 94)

-ng sut uncho php trn bnh rng ln:


10/52


Trang 10

4322408,18,1 20


SF:h s an ton khi tnh v tip xc: SF=1,75 (bng 6.2/trang 94)

- 121 KK FLFL :H s tui th:

28,26275,1

145910

1lim

1

S

K

F

FLF

F

(MPa)

85,24675,1

143220

2lim

2

S

K

F

FLF

F

(MPa)

ng sut un cho php khi qu ti.

+Bnh nh: 4245308,08,0 11 chF (MPa) (6.14/ trang 96)

+Bnh ln: 3604508,08,0 22 chF (MPa)

5.Thit k b truyn rng nghing:

a. Xc nh cc thng s c bn:

-Tnh bd

153,0 12 ibabd (6.16/tr 97)

Trong :h s chiu rng vnh rng 4,0ba (tra bng 6.6/tr 97)

87,0112,34,053,0 bd

Tra bng 6.7/tr98 ta c: 12,1KH 24,1KF

b.Tnh s b khong cch trc:

3

12

2

1

12)1

ba

H

asb

i

KTiKa

H

(6.15a/tr 96)

Trong : Ka=43 (MPa1/3) h s ph thuc vo vt liu cacp bnh rng loirng tr rng nghin.(tra bng 6.5/tr 96)

64,513H (MPa) ng sut tip xc cho php

35,1184,012,3

12,17,87650)112,343 3

2

64,513

asb (mm)

Chn 125asb (mm)

+Chn modun theo khong cch trc: 5,225,112502,001,002,001,0 asbm

Chn m=2,5-Gc nghing dc chn theo iu kin 80 200-s rng bnh nh:


11/52


Trang 11

1cos2

1

cos2

12

0

1

12

0

820

i

aZ

i

amm

sbsb (4.43/tr60 sch chi tit my)

03,248,22 1 Z

Chn Z1 =23 (rng)

9476,0

1252

112,3235,2

2

1cos 121

a

iZ

sb

m

63,180

-s rng bnh ln:76,712312,31122 ZiZ (rng)

Chon Z2 =72

T s truyn thc t l:

13,323

72

1

2 Z

Zitt

Sai lch t s truyn:%4%32,0%100

12

12

i

iitti

Tng s rng: 95722321 ZZZt -Xc nh li khong cch trc:

31,125cos2

955,2

cos2 63,180

Za

t

w

m(mm) (6.18/trang 99)

Chn aw =125c.Xc nh li cc thng s: (tra bng 6.11/trang 104)

-H s dch tm : 5,2955,05,2

1255,0 Z

at

w

my (6.22/trang 100)

H s: 31,2695

5,210001000

Zk

t

y

y

Theo bng 6.10a ,tra c kx=4,43

H s gim nh rng : 42,01000

9543,4

1000

Zk txy

Tng h s dch chnh: 92,242,05,2 yyxt Do h s dch chnh bnh rng 1 tnh theo 6.26/trang 101.

82,0

95

5,2237292,25,05,0 12

1

z

zzxx

t

t

y

1,282,092,212 xxx t

-Gc bin dng : 200

-Gc profin rng: 01,2163,18

20 00

0

coscos

tgarctg

tgarctgt

-Gc n khp: 88684,01252

cos5,295

2

coscos

01,210

a

Z

w

tt

tw

m

52,27

0

tw

-ng knh chia: 67,60cos/)235,2(cos/)( 63,180

11 Zd m (mm)

95,189cos/)725,2(/)( 63,180

22 ccsm Zd (mm)


12/52


Trang 12

-Do x1=0,82: ta c 86,6395

67,605,2267,60

21

11

Z

ddd

t

w

y(mm)

24,19912,386,631222 iddw (mm)

-ng knh vng nh: 87,7142,082,015,2267,6012 111 myxdda (mm)

55,20742,01,215,2295,18912 222 myxdda (mm)-ng knh vng y:

52,585,282,025,267,6025,2 111 mxddF (mm) 2,1945,21,225,295,18925,2 222 mxddF (mm)

-ng vng c s:01,57cos67,60cos 20

0

11 ddb (mm)

49,178cos95,189cos 200

22 ddb (mm)

-Chiu cao rng: h=(2,25-y).m=(2,25-0,42) . 2,5=4,57(mm)-Khe h hng knh: C=0,25 m=0,25 .2,5 =0,625 (mm)-Gc lng chn rng: P=m/3=2,5/3=0,830

-Kim nghim bn tip xc:

H

ww

H

HMH

idb

iKTZZZ

12

2

1

121

..

1...2.. (6.33/trang 105)

Trong :

ZM=274 MPa1/3

:h s k n c tnh vt liu lm bnh rng.

-Gc nghing ca rng trn hnh tr c s

314,0coscos 63,1801,2100 tgtgtg tb (6.35/trang 105)

46,170

b

H s k n hnh dng b mt tip xc.

52,1sin

cos2

2sin

cos2

52,272

46,170

0

tw

b

HZ (6.34/trang 105)

bw:chiu rng vnh rng: 504,0125 ab wbaw (trang 96)

h s trng khp dc.

103,214,35,2

sin50sin 63,180

m

bw (6.37/trang 105)

Z:h s k n s trng khp.


13/52


Trang 13

1Z (6.36c/trang 105)

h s trng khp ngang.

t

twwbaba

madddd

cos...2

sin22

2

2

2

2

1

2

1 (6.38a/trang 105)

33,2cos5,214,32

sin1252

01,21

52,2749,17855,20701,5787,710

02222

65,033,2

1Z

+KHh s ti trng khi tnhv tip xc.

Ta c: KKKK HVHHH (6.39/trang 106)

12,1KH : h s phn b khng u ti trong trn chiu rng vnh khn.

+Tnh vn tc vng: 43,260000

73086,6314,3

100060

11

1

ndv

w (m/s)(6.40/tr 106)

Da vo v tr v1trong bng 6.14/107 ,ta chn: 05,1KH cp chnh xc 8.

KHV: h s ti trng ng.

KKT

dbVK

HH

wwH

HV

1

1

21 (6.41/trang 107)

VH: cng ti trng ng.

i

agV

w

HH v12

0 (6.42/trang 107)

002,0H :h s xt n nh hng ca cc sai s n khp.(tra bng 6.15/107)

560g :h s xt n nh hng casai lch bc rng bnh dn v bnh b dn. (tra

bng 6.16/107)

-V=V1=2,43vn tc vng

72,1

12,3

12543,256002,0 VH


14/52


Trang 14

02,105,112,17,876502

86,635072,11

KHV

19,102,105,112,1 KKKK HVHHH

65,31412,350

112,319,17,87650265,052,1274

86,632

H

64,51365,314 HH (tha mn)

-Kim nghim rng v bn un.

1

1

11

1..

.....2F

ww

FF

F

db

YYYKT

m (6.43/trang 108)

21

21

2.

.F

F

FF

F

YY (6.44/trang 108)

-T1=87650,7(N.mm) momen xon trn bnh rng cn nh.

-m=2,5 modun php

-bw=50 chiu rng vnh rng.

-dw1=63,86 (mm)

42,033,2

11

Y :H s k n s trng khp. (trang 108)

86,0140

63,181

1401

Y (trang 108)

xZ

x

ZY i

vi

i

vi

F

25

1 092,02792,13

47,3

(4.53/trang 62 sch chi tit my)

Vi x1=0,82,x2=2,1 h s dch chnh.

03,2723

63,18coscos033

1

1

ZZv (4.52/trang 62 sch chi tit my)

61,8472

63,18coscos033

2

2

ZZv

17,3092,003,27

82,09,27

03,27

2,1347,3092,0

2792,1347,3 82,0

22

1

1

1

1

1

xZ

x

ZY

vv

F

YF1 h s dng rng bnh nh


15/52


Trang 15

33,3092,061,84

1,29,27

61,84

2,1347,3092,0

2792,1347,3 1,2

22

2

2

1

2

2

xZ

x

ZY

vv

F

YF2 h s dng rng bnh ln

KF: H s ti trng khi tnh v ung.

KKKK FVFFF .. (6.45/trang 109)

Trong :

24,1KF : h s phn b khng u ti trong trn chiu rng vnh khn.

KF :h s k n s phn b khng u ti trng cho cc i rng ng thi n khpkhi tnh v un.

KFV: H s k n ti trng ng xut hin trong vng n khp khi tnh v ung.

KKT

dbVK

FF

wwF

FV

1

1

21 (6.46/trang 109)

i

agV

w

FF V12

0 (6.47/trang 109)

- 006,0H :h s xt n nh hng can cc sai s n khp.(tra bng 6.15/107)

- 560 g :h s xt n nh hng can sai lch bc rng bnh dn v bnh bdn. (trabng 6.16/107)


73086,6314,3

100060

11

1

ndv

w (m/s)(6.40/tr 106)

Da vo v tr v1trong bng 6.14/107 sch hdck,ta chn: 22,1KF cp chnh xc 8.

16,512,3

12543,256006,0 VF

b:chiu rng vnh rng: 504,0125 ab wbaw

06,122,124,17,876502

86,635016,51

KFV

6,106,122,124,1 KKKK FVFFF

23,4086,635,250

17,386,042,06,17,8765021

F

28,26223,40 11 FF (tha mn)


16/52


Trang 16

85,24626,4217,3

33,323,4022

FF (tha mn)

+Kim nhim rng v qu ti:

-Trnh bin dn gy dn, trc b mt ng sut tip cc i khng vt qu gi tr chophp.

148465,314165,314maxmax

HqtHH K (MPa) (tha)

Vi 1max T

TKqt

+ng sut un cc i khng vt qu gii hn cho php

42423,40123,40max1max1

FqtFF K (tha)

Tnh lc tc dng ln trc:

a.Lc vng: 08,274586,63

7,8765022

1

1

21

d

TFF

w

tt (N) (4.14/trang 45 sch chi tit

my)

b.Lc hng tm: 12,99908,2745 200

121 tgtgFFF trr (N) (4.15/trang 46

sch chi tit my)

c.Lc vng : 42,92508,2745 63,180

121 tgtgFFF taa (N) (4.16/trang 46

sch chi tit my)

II:Thit k b truyn bnh rng tr rng thng (cp chm):

1.Cc thng s bnh dn:

+Momen xon T2=260005,6(N.mm)

+T s truyn i23=2,59

+s vng quay n2=233,97 (v/p) tui th Ln=8000

+Ti trng thay i theo bc T1=T ; T2=0,5T ; T3=0,75T

V t1=0,4tck ;t2=0,3tck ; t3=0,3tck

Do b truyn kn nn ta chn thit k theo ng sut tip.

2.Chn vt liu:


17/52


Trang 17

+Bnh nh: thp C50 ti ci thin cng t HB1=255 ; MPabl 800 ;MPach 530

+Bnh ln: thp C45 ti ci thin cng t HB2=240 ; MPabl 750 ;MPach 450

3.S chu k lm vic c s:

1025574,24,2

11 79,13030 HBNHO chu k (6.5/trang 93)

1024074,24,2

22 55,13030 HBNHO chu k

106

21 4 NN FOFO chu k

4.S chu k lm vic tng ng xc nh theo s ti trng:

t

T

Tt

T

Tt

T

Ttn

T

TN

mmm

i

m

c

HHHH

iiHE 3

2

2

2

1

22 75,05,0730160

max

60

(6.7/trang 93)

Trong : Ti, ni ,ti ln lt l momen xon, s vng quay v tng s gi lm vic ch i.

LtLtLLt

ttm nnnnck

ckH

3,0;3,0;4,04,0

;6 321

1075,05,01 83331 97,180003,03,04,0730160 NHE chu k

V i23=2,59 108

23

1

276,0

i

NN

HE

HE chu k

t

T

Tt

T

Tt

T

Ttn

T

TN

mmmi

m

c

HHHH

iiFE 321

75,05,0730160

max

60

(6.8/trang 93)

1075,05,01 86661 6,180003,03,04,0730160 NFE chu k

V i23=2,59 108

12

1

261,0

i

NN

FE

FE chu k

T mc 3,4 ta c:

NNNN HOHEHOHE 2211 ;

NNNN FOFEFOFE 2211 ;


18/52


Trang 18

12121 KKKK FLFLHLHL

A. ng xuat tiep xuc cho phep :

KKZZS

HLXHvr

H

H

H

0

lim (6.1/trang 91)

Vi: Zr:H s nhm b mt rng.

Zv:H s xt n nh hng ca vn tc vng.

ZXH:H s xt n nh hng can kch thc bnh rng.

S b ta c: Zr.Zv.KXH=1 (trang 92)

-ng sut tip xc cho php trn bnh rng nh:

5807025527020


-ng sut tip xc cho php trn bnh rng ln:

5507024027020


SH:h s an ton khi tnh v tip xc: SH=1,1 (bng 6.2/trang 94 )

- 121 KK HLHL :H s tui th:

27,5271,1

158010

1lim

1

S

K

H

HLHH

(MPa)

5001,1

155020

2lim

2

S

K

H

HLH

H

(MPa)

500,min 21min HHH (MPa)

62525,164,5132

50027,527

2 min

21

HMPaHH

H

(MPa)

(tha)

-ng sut tip xc cho php khi qu ti.

14845308,28,2 11max chH (MPa) (6.13/trang 95)

12604508,28,2 22max chH (MPa)

B.ng sut un cho php:

KKKYYS

FLFCXFSR

F

F

F

0

lim (6.2/trang 91)


19/52


Trang 19

Vi: YR:H s xt n nh hng ca nhm b mt ln chn rng.

YS:H s xt nhy can vt liu i vi tp trung ng sut.

KXF:H s xt n kch thc bnh rng nh hng n bn un.

KFC:H s xt n nh hng khi t ti.

S b ta c: YR.YS.KXF=1 vi KFC=1 (trang 92)

-ng sut un cho php trn bnh rng nh:

4592558,18,1 10


-ng sut un cho php trn bnh rng ln:

4322408,18,1 20


SF:h s an ton khi tnh v tip xc: SF=1,75 (bng 6.2/trang 94)

- 121 KK FLFL :H s tui th:

28,26275,1

145910

1lim

1

S

K

F

FLF

F

(MPa)

85,24675,1

143220

2lim

2

S

K

F

FLF

F

(MPa)

ng sut un cho php khi qu ti.

+Bnh nh: 4245308,08,0 11 chF (MPa) (6.14/ trang 96)

+Bnh ln: 3604508,08,0 22 chF (MPa)

5.Thit k b truyn rng tr rng thng:

a. Xc nh cc thng s c bn:

-Tnh bd

153,0 23 ibabd (6.16/tr 97)

Trong :h s chiu rng vnh rng 4,0ba

(tra bng 6.6/tr 97)

76,0159,24,053,0 bd

Tra bng 6.7/tr98 ta c: 12,1K

H 24,1K

F

b.Tnh s b khong cch trc:


20/52


Trang 20

3

23

2

2

23 )1

ba

H

asb

i

KTiKa

H

(6.15a/tr 96)

Trong : Ka=49,5 (MPa1/3) h s ph thuc vo vt liu ca cp bnh rng loi

rng tr rng thng.(tra bng 6.5/tr 96) 64,513H (MPa) ng sut tip xc cho php

49,1814,059,2

12,16,260005)159,25,49 3

2

64,513

asb (mm)

Chn 200asb (mm)

+Chn modun theo khong cch trc: 4220002,001,002,001,0 asbm

Chn m=3- Rng tr rng thng gc nghing =0-s rng bnh nh:

14,37

159,232002

12

23

3

iaZ

m

sb (rng)

Chn Z3=37 (rng)-s rng bnh ln:

83,953759,23234 ZiZ (rng)Chn Z4=96 (rng)T s truyn thc t l:

5945,237

96

3

4 Z

Zitt

Sai lch t s truyn: %4%17,0%10023

23

iiitti

Tng s rng: 133963743 ZZZt 2.Xc nh li cc thng s:-Xc nh li khong cch trc:

5,1992

1333

2

Za

t

w

m(mm)

Chn aw=200-H s dch chnh : x=0

-Gc n khp: 200

ttw -ng knh chia: 11137333 Zd m (mm)

28896344 Zd m (mm)

-Do x=0: ta c 11133 ddw (mm)

28844 ddw (mm)

-ng knh vng nh:11732111233 mdda (mm)

29432288244 mdda (mm)

-ng knh vng y:5,10335,21115,233 mddF (mm)

5,28035,22885,244 mddF (mm)


21/52


Trang 21

-ng vng c s:3,104cos111cos 20

0

33 ddb (mm)

63,270cos288cos 200

44 ddb (mm)

-Chiu cao rng: h=2,25.m=2,25 . 3=6,75(mm)-Khe h hng knh: C=0,25 m=0,25 .3 =0,75 (mm)

-Gc lng chn rng: P=m/3=3/3=10

-Kim nghim bn tip xc:

H

ww

H

HMH

idb

iKTZZZ

23

2

3

232

..

1...2.. (6.33/trang 105)

Trong :

ZM=274 MPa1/3

:h s k n c tnh vt liu lm bnh rng.

-Gc nghing ca rng trn hnh tr c s

76,1ZH : h s k n hnh dng b mt tip xc.(tra bng 6.12/trang 106)

bw:chiu rng vnh rng: 804,0200 ab wbaw (mm) (trang 96)

h s trng khp dc.

10

14,33

sin80sin 00

m

bw (6.37/trang 105)

Z:h s k n s trng khp.

3

4

Z (6.36a/trang 105)

h s trng khp ngang.

t

twwbaba

m

adddd

cos...2

sin22

4

2

4

2

3

2

3

(6.38a/trang 105)

75,1cos314,32

sin2002

20

2063,2702943.1041170

02222

86,03

75,14

3

4

Z

+KHh s ti trng khi tnh v tip xc.

Ta c: KKKK HVHHH (6.39/trang 106)


22/52


Trang 22

12,1KH : h s phn b khng u ti trong trn chiu rng vnh khn.


97,23311114,3

100060

23

3

ndv

w (m/s)(6.40/tr 106)

Da vo v tr v1trong bng 6.14/107 ,ta chn: 05,1KH cp chnh xc 8.

KHV: h s ti trng ng.

KKT

dbVK

HH

wwH

HV

2

3

21 (6.41/trang 107)

VH: cng ti trng ng.

i

avgV

w

HH

23

0 (6.42/trang 107)

004,0H :h s xt n nh hng ca cc sai s n khp.(tra bng 6.15/107)

560g :h s xt n nh hng ca sai lch bc rng bnh dn v bnh b dn. (tra

bng 6.16/107)

-V=V3=1,35vn tc vng

65,2

59,2

20035,156004,0 VH

03,105,112,16,2600052

1118065,21

KHV

21,103,105,112,1 KKKK HVHHH

11,390

59,280

159,221,16,260005286,076,1274

1112

H

64,51311,390 HH (tha mn)

-Kim nghim rng v bn un.

1

3

12

1..

.....2F

ww

FF

F

db

YYYKT

m (6.43/trang 108)

21

21

2.

.F

F

FF

F

Y

Y (6.44/trang 108)

-T2=260005,6(N.mm) momen xon trn bnh rng cn nh.

-m=3 modun php


23/52


Trang 23

-bw=80 chiu rng vnh rng.

-dw3=111 (mm)

57,075,1

11

Y :H s k n s trng khp. (trang 108)

1140

01

1401

Y (trang 108)

xZ

x

ZY i

i

i

i

F

2

1 092,02792,13

47,3

(4.36/trang 57 sch chi tit my)

82,3092,037

09,27

37

2,1347,3092,0

2792,1347,3 0

22

1

1

1

1

1

xZ

x

ZYF YF1

h s dng rng bnh nh

6,3092,096

09,27

96

2,1347,3092,0

2792,1347,3 0

22

2

2

1

2

2

xZ

x

ZYF YF2

h s dng rng bnh ln

KF: H s ti trng khi tnh v ung.

KKKK FVFFF .. (6.45/trang 109)

Trong :

24,1KF : h s phn b khng u ti trong trn chiu rng vnh khn.

KF :h s k n s phn b khng u ti trng cho cc i rng ng thi n khpkhi tnh v un.

KFV: H s k n ti trngng xut hin trong vng n khp khi tnh v ung.

KKT

dbVK

FF

wwF

FV

2

3

21 (6.46/trang 109)

i

agV

w

FF V23

0 (6.47/trang 109)

- 011,0H :h s xt n nh hng can cc sai s n khp.(tra bng 6.15/107)

- 560g :h s xt n nh hng can sai lch bc rng bnh dn v bnh b dn. (tra

bng 6.16/107)


97,23311114,3100060

233

ndv

w (m/s)(6.40/tr 106)


24/52


Trang 24

Da vo v tr v1trong bng 6.14/107 sch hdck,ta chn: 22,1KF cp chnh xc 8.

3,759,2

20035,156011,0 VF

b:chiu rng vnh rng: 804,0200

ab wbaw

08,122,124,16,2600052

111803,71

KFV

63,108,122,124,1 KKKK FVFFF

27,69111380

82,3157,063,16,26000521

F

28,26227,69 11 FF (tha mn)

85,24628,6582,3

6,327,6922

FF (tha mn)

+Kim nhim rng v qu ti:

-Trnh bindn gy dn, trc b mt ng sut tip cc i khng vt qu gi tr chophp.

148469,551211,390maxmax

HqtHH K

(MPa) (tha)

Vi 25,0

max T

TKqt

+ng sut un cc i khng vt qu gii hn cho php

42496,97227,69max1max1

FqtFF K (tha)

Tnh lc tc dng ln trc:

a.Lc vng: 78,4684111

6,26000522

3

2

43

d

TFF

w

tt (N) (4.14/trang 45 sch chi tit

my)

b.Lc hng tm: 12,170578,4684 200

343 tgtgFFF trr (N) (4.15/trang 46

sch chi tit my)

Bng cc thng s ca cp rng tr rng nghing:STT Thng s n khp Kch thc


25/52


Trang 25

1 Gc bin dng =200

2 Gc profin rng t=21,010

3 Gc n khp tw=27,520

4 ng knh chia d1=60,67(mm)

d2=189,95(mm)

5 ng knh vng ln dw1=63,86(mm)

dw2=199,24(mm)

6 ng knh vng nh da1=71,87(mm)

da2=207,55(mm)

7 ng knh vng y dF1=58,52(mm)dF2=194,2(mm)

8 ng vng c s db1=57,01(mm)

db2=178,49(mm)

9 Chiu cao rng h=4,57(mm)

10 Khe h hng knh C=0,625 (mm)

11 Gc lng chn rng P=0,830

12 Chiu rng vnh rng bw=50

Bng cc thng s ca cp rng tr rng thng:STT Thng s n khp Kch thc

1 Gc bin dng =200

2 Gc profin rng t=200

3 Gc n khp tw=200

4 ng knh chia d3=111(mm)

d4=288(mm)

5 ng knh vng ln dw3=111(mm)

dw4=288(mm)

6 ng knh vng nh da3=117(mm)da4=294(mm)


26/52


Trang 26

7 ng knh vng y dF3=103,5(mm)

dF4=280,5(mm)

8 ng vng c s db3=104,3(mm)

db4=270,63(mm)

9 Chiu cao rng h=6,75(mm)

10 Khe h hng knh C=0,75 (mm)

11 Gc lng chn rng P=10

12 Chiu rng vnh rng bw=80

CHNG III : THIET KE TRUC VA THEN

I:Vat lieu:Chon vat lieu che tao truc la thep cacbon C45 toi ci thin .Theo bang 6.1/trang 92:

MPab 750 : gii han ben moi MPach 450 : gii han ben chy

23520 mmN

x ng xuat uon cho phep

Chn )(201

MPa )(252

MPa )(303

MPa

II:Tnh sc ben truc:1.Tnh s bo trucTnh s bo ng knh truc

Theo cong thc :

3

2.0 x

xTd

(10.9/trang 188)

Tx:mo men x

x :ng xuat xoan cho phep

:x lay gia tr nhooi vi truc vao va gia tr ln vi truc ra

98,27202.0

7,8765031

d chon d1=30(mm)

32,37252.0

6,2600053

2

d chon d2=40(mm)

49,47302.0

5,6428903

3

d chon d3=50(mm)

T ng knh d c th xc nh gn ng chiu rng ln botheo bng 10.2/trang189

bo1=19 (mm) bo2=23 (mm) bo1=27 (mm)

2.Tnh gan ung truc :


27/52


Trang 27

Theo bang[7-1] ta chon cac kch thc:Khe h gia banh rang va thnh trong hop : k1=10(mm)Khoang cach tthnh trong hp en mat ben o lan k2=10(mm)Chieu rong o lan b0 =27(mm)Khong cch t chiu cao mt mt n np k3=12(mm)Chieu cao bulong ghep nap o va chieu day nap hn=18(mm)Khe h gia mat benbanh ai va au bulong :10(mm)

Chieu rong banh rang cap nhanh 50(mm)Chieu rong banh rang cap cham 80(mm)Tong hop cac kch thc tren ta chon chieu dai cac oan truc can thiet va khoang

cach gia cac khoi Chieu dai may banh ai va banh rang :Banh ai: 4536305,12,15,12,113 dm dl

chon lm13=40(mm)Banh rang :

Truc I 4536305.12.15,12.1 11412 dl lmm

Chon lm12=lm14=bw= 50(mm)Truc II: 604840152.15.12.1 22422 dl lmm


28/52


Trang 28

Chon lm22=lm24=60(mm) 6048405.12.15,12.1 223 dlm

Chon lm23=bw=80(mm)Truc III: 756050152.15.12.1 333 dlm

Chon lm33=bw=80(mm)

Khoang cach t cac chi tiet en cac goi :

ai: lc13=0.5(lm13+b0)+k3+hn=0,5(40+27)+12+18=63,5 (mm)

Khp noi :lc33=0.5(lm33+b0)+k3+hn=0,5(80+27)+12+18=83,5 (mm)

Khoang cach gia cac goi va iem at lc:

Khoang cach gia cac goi en chi tiet tren truc II

l22= 0,5(lm22+b0)+k1+k2 =0,5(60+27)+10+10=63,5(mm)

l23=l22+0,5(lm22+lm23)+k1=63,5+0,5(60+80)+10=143,5 (mm)l24=2l23 l22=2 x 143,5 63,5=223,5 (mm)

l21=2l23=2 x 143,5 =287(mm)

Khoang cach t goi en chi tiet tren truc III:

l32=l23=143,5 (mm)

l31=l21=287 (mm)

l33=2l32+lc33=2 x 143,5 + 83,5 =370,5(mm)

Khoang cach gia cac goi en chi tiet tren truc Il12=l22=63,5(mm)

l14=l24=223,5 (mm)

l11=l21=287 (mm)

l13=l21+lc13=287+ 68,5 =355,5 (mm)

Khoang cach gia cac chi tit khi tnh ton:

a= l21 l24=287 223,5= 63,5(mm)

b=l24 l23=223,5 143,5 =80 (mm)c=l23 l22=143,5 63,5=80 (mm)

d=l22=63,5 (mm)

+S phn tch lc tc dng:


29/52


Trang 29

Tnh phan lc cac goi :Truc I:


30/52


Trang 30

Cac lc: NFNF

NFNF

FF

F

aarr

tt

42,925,12,999

08,2745,17,1606

'11'11

'111d

ng knh:d1=30Cac phan lc :

022

13

1

'1'1

1

11

lFR

dFF

dmA

cdBY

ararY

dcbadcba

cbaFaF

)(66,2960287

5,35017,16065,22312,9995,6312,999

2213

1

'1

1

1'11

N

dcba

dcbacbaa lFd

Fd

FFF

R

cdaarr

BY

0'11 FRFFRF dBYrrAYy

75,64366,296017,160612,99912,999'11 RFFFR BYdrrAY (N) 0'11 dcbacbaaF RFmA BXttX

)(08,2745

287

5,22308,27455,6308,2745'11 Ndcba

cbaa FFR

tt

BX

0'11 RFFRFBXttAxx

08,274508,082745,274508,2745'11 RFFR BXttAx (N)

T biu mo men uon nhng tiet dien nguy hiem:


31/52


Trang 31

tiet dien ti n-n:79,1019915,6317,160613 lFM cdnun (Nmm)

tiet dien m-m: MM uxuymum M22

Vi

)(29,4405412717,16065,6366,2960267,60

42,9252

131

'1 NmddM lFRdF cdBYauy

)(58,1743125,6308,2745 NmdM RBXux

)(37.17979358,17431229,4405422 NmM mum

3.ng knh truc tiet dien nguy hiem: tiet dien n-n: theo cong thc [7-3]

mm

Md tdnn 3

1.0 (10.17/trang 194)

Vi NmmM

TM nuntd93,1271387,8765075.079,10199175,0

22

1

(10.16/trang 194) 63 N/m (tra bng 10.5/trang 195)

mmd nn 22,27631.0

93,1271383

tiet dien m-m:Vi

NmmM TM mumtd 56,1951607,8765075.037,17979375,022

1

63 N/m mmd nn 4,31

631.0

56,1951603

tiet dien n-n chon :dn-n=30(mm) tiet dien m-m chon:dm-m=32(mm)Vi d1=30 ta chn then theo bng 9.1/trang 173:b=8 ,h=7 , t1=4 ,t2=2,8

Chiu di then 40508,08,0 13 LmL Vi Lm13chiu di may bnh ai.(trang 174)

+Kim nghim then v bn dp:

dd

td

ThL

11

12

(9.1/trang 173)

Vi T1=87650,7N.mm d=30Tra bng 9.5/trang 178 ta c: 100d

dd

69,48

474030

7,876502 (tha)

-Ti tit din lp bnh rng:Chiu di then 40508,08,0 121 LL m Vi Lmchiu di may bnh rng

nghing. (trang 174)



32/52


Trang 32

dd

tLd h

T

111

2(9.1/trang 173)


dd

69,48

474030

7,876502 (tha)

+Kim nghim v sc bn ct:

cd bLd

T

1

12 (9.2/trang 173)

Vi 60c N/mm2

(trang 174)

-Ti tit din lp bnh ai:

c

26,18

84030

7,876502 (tha)

-Ti tit din lp bnh rng:

c

26,18840307,876502 (tha)

Tha mn yu cu v bn nn ta chn then b=8, h=7 lp trn trc I.4.Kim nghim bn trc I:1.kim tra bn ti m-m:

+H s an ton phi tha mn: SSSS

SS

22

(5.1/trang195) Vi 2S

(10.19/trang 195)

H s an ton ch xt ng sut php ti tit din m-m:

mjajdj

j

Ks 1

(10.20/tr 195)

i vi trc quay,ng sut un thay i theo chu k i xng:

W

M mumaj

minmax ; 0mj (10.22/trang 196)

Vi )/(37,179793 mmNM mum 27001,01,0 30

33 dW (mm3) (tra bng 10.6/tr 196)

59,662700

37,179793max

aj

Vy

ajdj

j

KS

1

)/(327750436,0436,02

1 mmNb

K

KK

Ky

x

dj

1

(10.25/trang 197)

Trong :6,1Ky (tra bng 10.9/trang 197)

06,1Kx (tra bng 10.8/trang 197)76,1K (tra bng 10.12/trang 199)

88,0 (tra bng 10.10/trang 198)


33/52


Trang 33

28,16,1

106,188,0

76,1

K dj

84,359,6628,1

327

S

H s an ton ch xt ng sut tipti tit din m-m:

mjajdjKs

1 (10.21/tr 195)

B truyn lm vit mt chiu nn ng sut tip bini theo chu k mch ng.

W

Tma

0

1max

22 (10.23/tr 196)

Vi )/(7,876501 mmNT

54002,02,0 3033

0 dW (mm3) (tra bng 10.6/tr 196)

11,854002

7,87650

2

max

mjaj

)/(66,18932758,058,02

11 mmN (trang 196)

05,0

(tra bng 10.7/197)

K

KK

Ky

x

dj

1

(10.26/trang 197)


06,1Kx (tra bng 10.8/trang 197)54,1K (tra bng 10.12/trang 199)

81,0 (tra bng 10.10/trang 198)

22,16,1

106,181,0

54,1

Kdj

41,1811,805,011,822,1

66,189

S

Vy : SS 7,341,1884,3

41,1884,322

(tha)

Truc II:


34/52


Trang 34

NF Ftt 08,2745'22 NFF rr 12,999'22 NFF aa 42,925'22

NFt 78,4684"2 NFr 12,1705"2

ng knh trc: d2=40

022

2

'2'2"2

2

22 dcbacbabaFaF R

dFFF

dmC DYarrarY


35/52


Trang 35

)(56,146287

5,14312,17055,22312,9995,6312,999

22"2

2

'2

2

2'22

N

dcba

bacbaa Fd

Fd

FFFR

raarr

DY

0) "2'22( RFFFRF DYrrrCYy

56,14656,14612,170512,99912,999"2'22 RFFFR DYrrrCY (N) 0'2"22 dcbacbaFbaa RFFmC DXtttX

)(47,5087287

5,14378,46845,22308,27455,6308,2745

"2'22

N

dcba

bacbaa FFFR

tttDX

0) "2'22( FFFRRF tttDXCXx

47,508747,508778,468408,274508,2745"2'22 RFFFR DXtttCX (N)T biu mo men uon nhng tiet dien nguy hiem: tiet dien ti e-e:

MM uxuyeue M22

Vi )(32,971985,6356,1462

95,18942,925

2

22

NmaM Rd

F CYauy

)(34,3230545,6347,5087 NmaM RCXux

)(77,33735934,32305432,9719822

NmM eue

tiet dien f-f: MM uxuyfuf M22

Vi

)(52,289938012,9995,14356,1462

95,18942,925

22

22

NmbbaM FRd

F rCYauy

)(54.5104458008,27455,14347,5087)( 2 NmbbaM FR tCXux

)(29.51126854.51044552,2899322 NmM fuf

3.ng knh truc tiet dien nguy hiem: tiet dien e-e: theo cong thc [7-3]

mmMd tdee 3

1.0 (10.17/194)

Vi NmmM TM euetd 4056036,26000575.077,33735975,022

2

(10.16/trang 194) 63 N/m (tra bng 10.5/trang 195)

mmd ee 07,40631.0

4056033

tiet dien f-f:

Vi NmmM TM fuftd 82,5586566,26000575.029.51126875,022

2


36/52


Trang 36

63 N/m

mmd ff 59,44631.0

82,5586563

tiet dien n-n chon :dn-n=40(mm)

tiet dien m-m chon:dm-m=45(mm)Vi d1=30 ta chn then theo bng 9.1/trang 173:b=12 ,h=8 , t1=5 ,t2=3,3

Chiu di then 48608,08,0 222 LL m Vi Lm22chiu di may bnh rngnghing.


dd

tLd

Th

122

22 (9.1/trang 173)

Vi T2=260005,6 (N.mm) d=40

Tra bng 9.5/trang 178 ta c: 100d

dd

27,90

584840

6,2600052 (tha)

-Ti tit din lp bnh rng:Chiu di then 64808,08,0 233 LL m Vi Lmchiu di may bnh rngthng.+Kim nghim then v bn dp:

dd

tLd

Th

132

22 (9.1/trang 173)


dd

7,67

586440

6,2600052 (tha)


ci bLd

T

2

22

Vi 60c N/mm2

(trang 174)

-Ti tit din lp bnh rng nghing:

c

56,22124840

6,2600052

(tha)-Ti tit din lp bnh rngthng:

c

92,16

126440

6,2600052 (tha)

Tha mn yu cu v bn nn ta chn then b=12, h=8 lp trn trc II.4.Kim nghim bn trc II:1.kim tra bn ti f-f:


SS

22

(5.1/trang195) Vi 5,2S

H s an ton ch xtng sut php ti tit din f-f:


37/52


Trang 37

mjajdj

j

Ks

1 (10.20/tr 195)


W

M fufaj

minmax ; 0mj (10.22/trang 196)

Vi )/(29,511268 mmNM fuf

64001,01,0 4033 dW (mm

3) (tra bng 10.6/tr 196)

88,796400

29,511268max

aj

Vy

ajdj

j

KS

1

)/(327750436,0436,02

1 mmNb

K

KK

Ky

x

dj

1

(10.25/trang 197)


06,1Kx (tra bng 10.8/trang 197)

76,1K (tra bng 10.12/trang 199)

85,0 (tra bng 10.10/trang 198)

33,16,1

106,1

85,0

76,1

K dj

07,388,7933,1

327

S

H s an ton ch xtng sut tip ti tit din f-f:

mjajdj

j

Ks

1

B truyn lm vit mt chiu nn ngsut tip bin i theo chu k mch ng.

W

Tma

0

2max

22

(10.23/tr 196)

Vi )/(6,2600052 mmNT

128002,02,0 4033

0 dW (mm3) (tra bng 10.6/tr 196)

15,10128002

6,260005

2

max

ma

)/(66,18932758,058,02

11 mmN (trang 196)

05,0

(trabng 10.7/197)

K

KK

Ky

x

dj

1

(10.26/trang 197)


38/52


Trang 38



54,1K (tra bng 10.12/trang 199)

78,0 (tra bng 10.10/trang 198)

27,16,1

106,178,0

54,1

Kdj

15,1415,1005,015,1027,1

66,189

S

Vy : SS

3

15,1407,3

15,1407,322

(tha)

truc III:

Fr3=1705,12 (N)Ft3=4684,78 (N)

ng knh:d3=50(mm)Cac phan lc :


39/52


Trang 39

03 dcbabaF RmE FYrY

)(56,852287

5,14312,17053 N

dcba

baFR

rFY

03 RRFF FYEYrY

56,85256,85212,17053 RFRFYrEY 03 dcbabaF RmE FXtX

)(39,2342287

5,14378,46843 Ndcba

baFR

tFX

03 RRFF FXEXtX

39,234239,234278,46843 RFR FXtEX (N)

T biu mo men uon nhng tiet dien nguy hiem: tiet dien ti g-g:

MM uxuygug M22

36,1223425,14356,852)( baRM EYuy (Nmm)

96,3361325,14339,2342 baRM EXux (Nmm)

)(21,35770596,33613236,12234222 NmM gug

3.ng knh truc tiet dien nguy hiem: tiet dien g-g: theo cong thc [7-3]

mm

Md tdgg 3

1.0 (10.17/194)

Vi NmmM TM gugtd 94,6617655,64289075.021,35770575,0 223 (10.16/trang 194)

63 N/m (tra bng 10.5/trang 195)

mmd gg 18,47631.0

94,6617653

tiet dien g-g chon :dg-g=50(mm)Vi d3=50 ta chn then theo bng 9.1b=16 ,h=10 , t1=6 ,t2=4,8

Chiu di then 72809,08,0 334 LL m Vi Lm33chiu di may bnh rngthng.

+Kim nghim then v bn dpti cc tit din lp bnh rng:

dd

tLd

Th

143

32

Vi T3=642890,5N.mm d=50 100d

dgdg

29,89

6107250

5,6428902 (tha)


ci bLd

T

3

32


40/52


Trang 40

Vi 60c N/mm2

-Ti cc tit din lp bnh rng:

cgg

7,28

146450

5,6428902 (tha)

Tha mn yu cuv bn nn ta chn then b=14, h=9 lp trn trc III.4.Kim nghim bn trc III:1.kim tra bn ti e-e:


SS

22

Vi 5,2S


W

M guga

minmax ; 0m

Vi )/(21,357705 mmNM gug

125001,01,0 5033

3 dW (mm

3

)

61,2812500

21,357705max

a

Vy

ajdj

j

KS

1

)/(327750436,0436,02

1 mmNb

K

KK

Ky

x

dj

1

(10.25/trang 197)



76,1K (tra bng 10.12/trang 199)

81,0 (tra bng 10.10/trang 198)

39,16,1

106,181,0

76,1

K dj

22,861,2839,1

327 S

H s an ton ch xtng sut tip ti tit din f-f:

mjajdj

j

Ks

1

B truyn lm vit mt chiu nn ng sut tip bin i theo chu k mch ng.

W

Tma

0

2max

22 (10.23/tr 196)

Vi )/(5,6428903 mmNT

250002,02,0 50330 dW (mm3) (tra bng 10.6/tr 196)


41/52


Trang 41

85,12250002

5,642890

2

max

ma

)/(66,18932758,058,02

11 mmN (trang 196)]

05,0

(tra bng 10.7/197)

K

KK

Ky

x

dj

1

(10.26/trang 197)



54,1K (trabng 10.12/trang 199)

76,0 (tra bng 10.10/trang 198)

3,16,1

106,176,0

54,1

Kdj

93,1085,1205,085,123,1

66,189

S

Vy : SS

56,6

93,1022,8

93,1022,822

(tha)

CHNG V :THIET KE GOI TRUC

I) Chon o lan:

Trc I v trc II c lc dc trc tc dng nn ta chn bi chn,cn i vi trc IIIchn bi .

1.Truc I:c d1=30 (mm)

S o chon o cho truc I :


42/52


Trang 42

Chn 12

Theo bng 17P/trang 346(thit k chi tit my)

+Phn lc tng cng ln :

55,281975,64308,27452222 RRR AXAYA (N)

44,403766,296008,27452222 RRR BXBYB (N)

Kt cu bnh rng lc dc trc nhng n i xng ,bng nhau v ln v ngcchiu dn n n b trit tiu ,v c th coi nh bng 0

-Ta chn theo bn phiv ti trng tc dng ln hn

+Cc h s :

1,1Kd : c tnh ti trng(tra bng 11.3/tr 215)

Kt=1 nhit lm vit nh hn 1000C (tr 214)

V=1: h s tnh n vng trong quay (tr 214)

X=1 ,Y=0 tra bng 11.4/tr 215)

Ti trng quy c tc dng ln trc:

19,444111,144,403711 kkFF dtar YXVQ

-tui th tnh bng triu vng:

4,350800073060..60

101066

Lnn

L (triu vng)

+Kh nng ti ng tnh ton:

31,313104,35019,4441 33 LQC

+Theo bng 17P sch thit k chi tit my

Ta chn 36306 kh nng ti trng C=41000(N)

C: D=72 ;B=T=19

Tui th xc nh theo cng thc:

49,165019,4441

41000

3/10

QC

m

L (triu vng)


43/52


Trang 43

+Tui th tnh bng gi:

42,3768273060

49,1650

60

101066

n

LLh (gi)

Truc II : d2=40(mm) ,

S o chon o truc II:

Chn 12 Theo bng 17P/trang 346 (thit k chi tit my)


58,508947,508756,1462222 RRR CXCYC (N)

58,508947,508756,1462222 RRR DXDYD (N)

Kt cu bnh rng lc dc trc nhng n i xng ,bng nhau v ln v ngcchiu dn n n b trit tiu ,v c th coi nh bng 0


+Cc h s :

1,1Kd : c tnh ti trng (tra bng 11.3/tr 215)

Kt=1 nhit lm vit nh hn 1000C (tr 214)

V=1: h s tnh n vng trong quay (tr 214)

X=1 ,Y=0 tra bng 11.4/tr 215)


53,559811,158,508911 kkFF dtar YXVQ


3,112800097,23360..60

101066

Lnn

L (triu vng)


61,270103,11253,5598 33 LQC

+Theo bng 17P sch thit k chi tit myTa chn 36308 kh nng ti trng C=60000(N)


44/52


Trang 44

C: D=90 ;B=T=23


88,2713

53,5598

600003/10

Q

Cm

L (triu vng)

+Tui th tnh bng gi:

08,19332197,23360

88,2713

60

101066

n

LLh (gi)

+)Truc III:d3=50

S o chon o cho truc III :

Chn 12

Theo bng 17P/trang 346 (thit k chi tit my)


71,249239,234256,8522222 RRR EXEYE (N)

71,249239,234256,8522222 RRR FXFYF (N)

Fa=0


+Cc h s :

1,1Kd : c tnh ti trng (tra bng 11.3/tr 215)

Kt=1 nhit lm vit nh hn 1000C (tr 214)V=1: h s tnh n vng trong quay (tr 214)

X=1 ,Y=0 tra bng 11.4/tr 215)


98,274111,171,249211 kkFF dtar YXVQ


2,43800002,9060..60

101066

Lnn

L (triu vng)


45/52


Trang 45


11,96212,4398,2741 33 LQC

+Theo bng 17P sch thitk chi tit my

Ta chn 310 kh nng ti trng C=72000(N)C: D=110 ;B=T=27


84,5381398,2741

720003/10

Q

Cm

L (triu vng)

+Tui th tnh bng gi:

92,99655259060

84,53813

60

101066

n

L

Lh(gi)

+Boi trn o : v van toc cua bo truyen thap nen ta boi trn o bang m loai T theobang [ 8-28 ]

+Che kn o bang loai vong pht . (Lot kn bo phan o ) theo bang [8-29]

1. Chon kieu o lan :

Co nh truc theo phng doc truc.

e co nh truc theo phng doc truc co the dung nap o va ieu chnh khe h cua obang cac tam nem KL gia nap o va than hop giam toc nap o lan vi hop gian tocbang vt, loai nap nay de che tao va de lap ghep.

2. Boi trn o lan :

Bo phan o c boi trn bang m, v van toc bo truyen banh rang thap, khong thedung phng phap ban toc e hat dau trong hop vao boi trn bo phan o. Co the dungm loai tng ng vi nhiet o lam viec t 60 1000C va van toc di 1500vg/p (12-6).

Lng m cha 2/3 cho rong cua bo phan o. e m khong chay ra ngoai va ngankhong cho dau ri vao bo phan o nen lam vong chan dau.

3. Che kn o lan :

e che kn cac au truc ra, tranh s xam nhap cua bui bam va tap chat vao o, cungnh ngan m chay ra ngoai, ay dung loai vongpht la n gian nhat bang 12-7 choKT vong pht.


46/52


Trang 46

CHNG VI: V HP,CC CHI TIT MY KHC V DUNG SAI.

1.V hp:

Chn v hp c,mt ghp gia np v thn v hp l mt phng i qua ng lm

cc trc vic lp ghp c d dng.

Bng 10-9 cho php ta tnh c kch thc cc phn t cu to ca v hp nh sau:

Chiu dy thnh thn hp :

= 0,025A +3 =0,025 x 200 +3 =8 (mm).

Chiu dy thnh np hp:

1 =0,02 x A+3=0.02 x 200 + 3 7 (mm) .

Chiu dy mt bchdi ca thn:

b =1,5 x = 1.5x8 = 12 (mm) .

Chiu dy hp khng c phn li :

p = 2.35 x =2.35x8 = 19 mm .

Chiu dy gn thn hp :

m = (0,85 1) x = 8 mm .

Chiu dy gn np hp :

m1 = (0,85 -1).1 = 8 mm .


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Trang 47

ng knh Bu-lng nn :

dn = 0,036 .A + 12 = 0.036 x 200+12 20mm .

ng knh Bu-lng :

Cnh :

d1 = 0,7 .dn = 0.7 x 20 14 (mm) .

Ghp np vo thn :

d2 = (0,5 0,6 )dn=(1012) ; chon 12 (mm).

Ghp np :

d3 = (0,4 0,5)dn =(810); chon 10(mm).

Ghp np ca thm :

d4 =(0,3 0,4 )dn =(68); chon 8(mm).ng knh Bu-lng vng c chn theo trng lng ca hp gim tc ,vi khong

cch trc A ca 2 cp (190x185) .

Tra bng 10-11a v 10-11b ta chn Bu-lng M20x25.

S lng Bu-lng nn:

n =300200

BL

L : Chiu di hp ;S b ly = 615mm .

B : Chiu rng hp ; S b ly = 334 mm .

5.4200

364537

n chn n= 6 .

2.Cht nh v :


48/52


Trang 48

60

c

d

l

Tra bng 10-10c thit k chi tit my ta ly cht nh v c gi tr d=10mm,c=1,5mm;

l= 30 mm .

quan st cc chi tit trong hp v rt dn vo trong hp trn nh np nh hp ta

Lp cy thm c gn li lc du,kch thc c tra bng 10-12 thit k chi titmy np c ghp bng 4 bulong 8x22 .

3.Thit b thm du (que thm du) :

Dng d kim tra mc du trong gim tc m bo mc du ln mc cho php, cc chi tit hot ongtt .

tng cng ca v hp ta thm phn gn .

-Nt tho du : Dng tho du c ,thay du mi sau mt thi gian hot ng bbnhoc bin cht.

24

28

20

2

Tra bng 10-14 thit k chi tit my ta chn d = 16 x1,5 .

-Nt thng hi :Khi lm vic ,nhit trong my tng ln ,p sut trong my cng tng . lm gim p sut trong hp ta dng nt thng hi ,ng thi cng iu hokhng kh bn trong v bn ngoi hp.

Nt thng hi ta tra bng 10-10 thit k chi tit my ,ly nt M 16x2 .


49/52


Trang 49

Do

do

d

lv

dc

c l

lc

D

-Vng chn du : Gip cho du khng ln vo m bi trn trong ln .

-Vng pht : Gip ngn bi chui vo cc u trc .

-Vng mc : Dng tho lp hp gim tc .

4.Bi trn hp gim tc :

gim mt mt cng sut v ma st,gim mi mn rng,m bo thot nhit tt v phng cc thit b han r .Cn phi bi trn lin tc cc b truyn trong hp giam tc.Vic chn hp l loi du, nht v h thng bi trn s lm tng tui th ca btruyn tc l tng thi gian phc v ca my.Theo bng 10-17 thit k chi tit my,chn nht bi trn bnh rng 50oC l 116 centistoc hoc l 16 engel v theobng 10-20,thit k chi tit my,chnloi du l AK 20 .

5. Dung sai lp ghp :Da vo kt cu v yu cu lm vic ,ch ti ca cc chi tit trong hp gim tc ta

chn cc kiu lp ghp nh sau :

-Dung sai lp ghp bnh rng :

Chuti va thay i,va p nh ta chn kiu lp trung gian H7/k6 .

-Dung sai lpghp ln :

+ Vng trong chu ti tun hon ,va p nh ,lp theo h thng trc, vng khongb trt trn b mt trc khi lm vic ta chn kiu lp trung gian c di K6 .

+ Vng ngoi lp theo h thng l,vng ngoi khng quay nn chu ti trng cc b.

mn u v c th dch chuyn khi lm vic donhit tng,ta chn kiu lptrung gian H7.

+ i vi u vo v u ra ca hp ta s dng ch lp m6,v 2 u trc nyni vi khp ni v lp bnh ai ta cn ng trc cao hn.

- Lpvng chn du trn trc:

+ Chn kiu lp trung gian H7/J96 thun tin cho qu trnh tho lp .

- Lp bc chn tn trc : V bc ch c tc dng chn cc chi tit trn trc nn ta chnch lp trung gian H8/h6 .


50/52


Trang 50

- Lp np ,thn : Chn kiu H7/C8, d tho lp.

- Lp then trn trc :

+ Theo chiu rng : Chn kiu lp trn trc l P9/H9 v kiu lp trn bc l J9/H9.

+ Theo chiu cao : Sai lch gii hn kch thc then l 11.

+ Theo chiu di : Sai lch gii hn then l 14.

- Lp bnh ai v khp ni : Vi trc bnh ai v khp ni ,v mi ghp c th dtho lp nhiu nn ta dng ch lp lng H9/h9.

Bng dung sai lp ghp :

Chi tit. Mi lp.

Sai lch trn. Sai lch di. di

(m)

ln nht.

h

(m)nh nht

ES es EI ei

Bnh rng :

3 H7/k6. +25 +18 0 +2 18 23

7 H7/k6. +25 +18 0 +2 18 23

8 H7/k6. +30 +21 0 +2 21 28

12 H7/k6. +30 +21 0 +2 21 28

chn 1 dy(theo gost 831-75) lp ln trc.

2 H6 - +25 - +9 25 -

4 H6 - +18 - +2 18 -

6 H6 - +18 - +2 18 -

10 H6 - +18 - +2 18 -

Lp ln v hp:2 H7 +30 - 0 - - 30

4 H7 +30 - 0 - - 30

6 H7 +30 - 0 - - 30

10 H7 +30 - 0 - - 30


51/52


Trang 51

TI LIU THAM KHO

1. THIT K CHI TIT MYNguyn Trng Hip -Nguyn Vn LmNh xut bn i hc v Trung hc chuyn nghip

2. TNH TON THIT K H DN NG CKH , TP 1 , 2Trnh Cht L Vn UynNh xut bn gio dc

3. GIO TRNH V K THUT , TP 1 , 2Khoa Ckh, trng i hc CN TPHCM

4. GIO TRNH DSLG V KTDL ,Nh xut bn gio dc


52/52

O AN CHI TIET GVHD : DIP BO TRB

III

II

I

90

89

7070

do an chi tiet may 3

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