- 12104213 GVHD: H NGC BN
1

LU


 

 

 



  -

  

 


  
 



3. nh kho t lc. 27
4.  ti trc I : 29
5.  ti trc II : 32
6.  ti tr trc III : 35
7. Kim nghim trc v  bn m 38
IV.   46
1. m nghi bn ca then 46
2.   46
V.  H 52
1. t cu ca v hp : 52
2. p gim tc : 53
3. Lu chnh s p : 53
- 12104213 GVHD: H NGC BN
3

4. c cn t cu tp gim tc : 53
5. C nh trc trc : 56
6. Mt s kt c : 56
7. Dung sai l  59
U THAM KHO 61


b. 
td
):
 ti trc sau:



















 P
1
=0,8T
P
2
= T
t



 














 








c. Hiu sut truy





- 12104213 GVHD: H NGC BN
5

 




 
d. t cn thin (P
ct
) :










e. Chn :
T s truy (u
t
):
u
t
= u

= n
lv
.u
t
= 48,48.24 =1163,52 (v/ph)
Ch

> P
ct
Vi n
sb
= 1163,52(v/ph) chn t quay 


Tra bng P1.2 ph lu [1],
vi : P
ct
= 5,46 kW n


 n DK52-4
 : P

= 7 kW > P
ct
= 5,46 kW
n

= 144
2. i t s truyn


u = u
n
.u
c
.u
x
= u
h
.u

  






Ta chn u

= 3  cho :



















 










M : u = u
n
.u
c
.u
= 3,45.2,87.3 = 29,705 (**)
Kim tra sai lch ca t s truyu :

=P
t
= 5,6 kW
+ Trc III :










+ Trc II :










+ Trc I :
 











 Trc III :











 Trc IV :
n
IV
= n
lv

c. c:
 ng 


















 Trc III :
 















(kW)
6,38
6
5,83
5,66
5,6
T s truyn u
u
nt
= 1
u
n
= 3,45
u
c
= 2,87
u

= 3
S 

1440
480
139,1
48,47
48,48
Momen xon T
(N.mm)
42311,8
119375

):
d
1
   Ta chn d
1
= 110mm
- Chii hn(l):
l  
- Vn t












Thu kin v
1
= 10,55 m/s < v
max
= 25 m/s
 n (d
2
)
c 4.2, vi h s t  = 0,02









 u nm trong pha t s truyn.
b. Khoc (a):


= 3, d
bng 4.14 u [1]







Tr s a phi thu kin sau:
0,55(d
1
+d
2

1
+d
2










 Tui th u kin
-  








Vi
 







 




 Vi 
1
= 143,43
0
thu kin
3. nh s :
a. S 
Tc 4.16
- 12104213 GVHD: H NGC BN
10



















u
=1,14: h s k n ng ca t s truyn





Ta chn z = 3
b. Chiu r
 :
B= (z-1).t + 2e






 B = ( 3-1).15 +2.10 = 50 mm
c. (d
a
) :

d
a
= d+ 2h
0

Vi h
0
= 3,3

F
v
: lF
v
= q
m
.v
2
=0,105.10,55
2
=11,69 (N)
Vi q
m
=0,105kg/m : kh
v= 10,55 m/s : vn t :






b. Lc F
r
:
c 






Dit din (mm
2
)
A
81
 (mm)
d
1
140
Vn t
V
1

10,55
ng n (mm)
d
2

411,6
Chn 400
T s truyn thc t
u
t
2,92
Sai lch t s truyn (%)
u
2,7
Kho (mm)
a
400

z
1,2
0,89
1
1,14
0,95

[P
0
]
2,2
S 
z
3
Chiu r
B
50

d
a1

d
a2

146,6
406,6
Lu (N)
F
0
223,69












Ch r HB
1
= 254  rn HB
2
 :
 











 






 truy i tr chu k i, ng su
c 6.7:
















 








1
= u
n
= 3,45



ng thc
 




 










 








 











 







- 12104213 GVHD: H NGC BN
13








 









Vi cp nhanh p chm ta u s d tr 

th u [1] :














































  






 








- 12104213 GVHD: H NGC BN
14

 ng su
 :

















 :
K
a
 s ph thut liu ca c
K
a
= 43 




(tra bu [1])
u
1
 s truyn
u
1
= u
n
= 3,45
T
1
momen xo ng
T
1


(tra bu [1])


 ng sut ti
[

 = 503,65 MPa
 :






















- 12104213 GVHD: H NGC BN
15

Theo bu [1],
ta ch
1
= 2
 nh s 
Ch  = 10
0

 u [1],
   



























Suy ra : 


c. Kim nghi  bn ti :
 u [1],
 thng sut tit
 :

















Vi :









 




 





 
 
Suy ra : 











vi 






D
u [1]
  s k n s
p c
















= 1,66
 d
w1
:












u [1], ta n t










Vi    theo bng  



 s k  n ng ca sai l



(tra bu [1])












 





u [1]
  s k n ti
trng xut hip K
Hv















 



u [1],
 s ti trng khi
 tiK
H

 










 ng sut ti :
Vi: v = 1,61 m/s < 2,5 m/s,







Vi cng hn c mc ti n gia
 
a

Z
R
= 0,95
d
a
< 700 mm, khi K
xH
= 1

theo  u [1]














Chn b
w
= 46 mm
d. Ki m nghi  bn un:
 m b bn ung sut un sinh ra t
tr 





















Vi :


 h s k n  ng c p



(tra bu [1])


 s k  n ng ca sai l



(tra bu [1])













 s k  n s  u ti tru r


 1,08
















 



Theo c 6.45 trang 109 u [1],
 s ti trng khi
 unK
F


(Y

 s k n s  p cY

 s k  
S  :

























a

xF
= 1
K
xF
 s   bn un.

 liu [1],
ng
sut u
F
] 
















 c :



 <



=269,61 MPa
 












 




e. Kim nghi i :
 ng sut tip ci


:




  




 ng sut un c






















c trong bu [1]
c:
 chia:
- 12104213 GVHD: H NGC BN
20





















  







 














4. p chm: B truy 
a.  khoc:











= u
c
= 2,87
T
2
momen xo ng
T
2
= 400262,4 Nmm


 s


= 0,45
(tra b u [1])


 s k  n s  u ti tru r
 ti
































 
Chn a
w2
= 197 mm
b.  p.
  :
- 12104213 GVHD: H NGC BN
21








 
n z
1
= 33
S  n :





n z
2
= 94
 s truyn thc s  :












c. Kim nghi  bn tip  :
 u [1],
 ng sut tit
 :





















 :


 s k  u cp











- 12104213 GVHD: H NGC BN
22

Suy ra : 






u [1],
 s k
ng b m t ti






















M 
u [1],
















n t










Vi  theo b .
Theo bu [1], vi c ta chn



(K

 s k n s    u ti tr ng th
khp)
u [1],












- 12104213 GVHD: H NGC BN
23

 





u [1]
  s k n
ti trng xut hip K
Hv
















c 6.39 trang 106 u [1],
 s ti trng khi
 tiK
H

 








 vc:
 














R
= 0,95
d
a
< 700 mm, khi K
xH
= 1

 u [1]















y 



,  ,  gim chiu r


- 12104213 GVHD: H NGC BN
24




















 :
K

= 1,32
(Tra bu [1])

Vi v < 2,



(tra bu [1])













 





u [1]
  s k n ti
trng xut hip K
Fv











  



u [1],
 s ti trng khi
 unK
F

 
































Theo b u [1]
 :
- 12104213 GVHD: H NGC BN
25







Vi m =2,5 

















 c :





 vc :
 













 




e. Kim nghi i :
 ng sut tip ci











Vi h s i 

 :





















y b truyu v i.
f.  c b truyn :
 Khoc : a
w2
= 197 mm
  : m
2
= 3
 Chiu rng  : b
w2
= 66 mm