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8/2/2019 do an chi tiet may 3
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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 %
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O AN CHI TIET GVHD : DIP BO TR
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)
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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.
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O AN CHI TIET GVHD : DIP BO TR
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:
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O AN CHI TIET GVHD : DIP BO TR
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:
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O AN CHI TIET GVHD : DIP BO TR
Trang 9
5807025527020
1lim HBH (MPa) (bng 6.2/trang 94)
-ng sut tip xc cho php trn bnh rng ln:
5507024027020
2lim HBH (MPa) (bng 6.2/trang 94)
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:
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O AN CHI TIET GVHD : DIP BO TR
Trang 10
4322408,18,1 20
2lim HBF (MPa) (bng 6.2/trang 94)
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:
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O AN CHI TIET GVHD : DIP BO TR
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)
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O AN CHI TIET GVHD : DIP BO TR
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.
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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)
+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 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)
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O AN CHI TIET GVHD : DIP BO TR
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:
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O AN CHI TIET GVHD : DIP BO TR
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 ;
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O AN CHI TIET GVHD : DIP BO TR
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
1lim HBH (MPa) (bng 6.2/trang 94)
-ng sut tip xc cho php trn bnh rng ln:
5507024027020
2lim HBH (MPa) (bng 6.2/trang 94)
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)
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O AN CHI TIET GVHD : DIP BO TR
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
1lim HBF (MPa) (bng 6.2/trang 94)
-ng sut un cho php trn bnh rng ln:
4322408,18,1 20
2lim HBF (MPa) (bng 6.2/trang 94)
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:
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O AN CHI TIET GVHD : DIP BO TR
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)
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O AN CHI TIET GVHD : DIP BO TR
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)
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O AN CHI TIET GVHD : DIP BO TR
Trang 22
12,1KH : h s phn b khng u ti trong trn chiu rng vnh khn.
+Tnh vn tc vng: 35,160000
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
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O AN CHI TIET GVHD : DIP BO TR
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)
+Tnh vn tc vng: 35,160000
97,23311114,3100060
233
ndv
w (m/s)(6.40/tr 106)
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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)
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O AN CHI TIET GVHD : DIP BO TR
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 :
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O AN CHI TIET GVHD : DIP BO TR
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
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O AN CHI TIET GVHD : DIP BO TR
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:
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O AN CHI TIET GVHD : DIP BO TR
Trang 29
Tnh phan lc cac goi :Truc I:
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O AN CHI TIET GVHD : DIP BO TR
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:
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O AN CHI TIET GVHD : DIP BO TR
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)
+Kim nghim then v bn dp:
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Trang 32
dd
tLd h
T
111
2(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)
+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)
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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)
Trong :6,1Ky (tra bng 10.9/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:
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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
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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
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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.
+Kim nghim then v bn dp:
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)
Vi T2=260005,6N.mm d=40Tra bng 9.5/trang 178 ta c: 100d
dd
7,67
586440
6,2600052 (tha)
+Kim nghim v sc bn ct:
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:
+H s an ton phi tha mn: SSSS
SS
22
(5.1/trang195) Vi 5,2S
H s an ton ch xtng sut php ti tit din f-f:
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Trang 37
mjajdj
j
Ks
1 (10.20/tr 195)
i vi trc quay,ng sut un thay i theo chu k i xng:
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)
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)
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)
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Trang 38
Trong :6,1Ky (tra bng 10.9/trang 197)
06,1Kx (tra bng 10.8/trang 197)
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 :
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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)
+Kim nghim v sc bn ct:
ci bLd
T
3
32
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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:
+H s an ton phi tha mn: SSSS
SS
22
Vi 5,2S
i vi trc quay,ng sut un thay i theo chu k i xng:
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)
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)
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)
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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)
Trong :6,1Ky (tra bng 10.9/trang 197)
06,1Kx (tra bng 10.8/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 :
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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)
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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)
+Phn lc tng cng ln :
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
-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:
53,559811,158,508911 kkFF dtar YXVQ
-tui th tnh bng triu vng:
3,112800097,23360..60
101066
Lnn
L (triu vng)
+Kh nng ti ng tnh ton:
61,270103,11253,5598 33 LQC
+Theo bng 17P sch thit k chi tit myTa chn 36308 kh nng ti trng C=60000(N)
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Trang 44
C: D=90 ;B=T=23
Tui th xc nh theo cng thc:
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)
+Phn lc tng cng ln :
71,249239,234256,8522222 RRR EXEYE (N)
71,249239,234256,8522222 RRR FXFYF (N)
Fa=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:
98,274111,171,249211 kkFF dtar YXVQ
-tui th tnh bng triu vng:
2,43800002,9060..60
101066
Lnn
L (triu vng)
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Trang 45
+Kh nng ti ng tnh ton:
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
Tui th xc nh theo cng thc:
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.
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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 :
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O AN CHI TIET GVHD : DIP BO TR
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 .
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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 .
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- 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
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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
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O AN CHI TIET GVHD : DIP BO TRB
III
II
I
90
89
7070