KY THUAT

1. Chapter III 1
KYÕ THUAÄT NAÂNG -VAÄN CHUYEÅN
CHÖÔNG 3
DAÂY & CAÙC CHI TIEÁT QUAÁN,
HÖÔÙNG DAÂY
(WIRE ROBES AND CHAINS FORHOISTING AND HAULAGE.
LIFTING TACKLE, DRUM,SHEAVES, SPROCKETS)

2. Chapter III 2
1. DAÂYCAÙP THEÙP
(wirerope)
Caáu taïo:
-Cheá taïo töø nhöõng sôïi theùp saùng
hay traùng keõm ñöôøng kính töø 0,2-
3mm ñaõ ñöôïc hoùa cöùng

3. Chapter III 3
 Keátcaáu
 Tuøy theo caùch beän:
-Beän ñôn
-Beänkeùp
-Beän ba lôùp
 Tuøy theo chieàu cuoán :
-Beän xuoâi
- beän cheùo
- Beän toång hôïp
1. DAÂYCAÙP THEÙP (tt)
(wire rope)
 Tuøy theo tình traïng tíeâp xuùc :
-Tieáp xuùc ñöôøng
-Tieáp xuùcñieåm

4. Chapter III 4
1. DAÂYCAÙP THEÙP (tt)
(wire rope)
•Beänkeùp

5. Chapter III 5
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

6. Chapter III 6
1. DAÂYCAÙP THEÙP (tt)
(wire rope)
LLL %20rope LRL %20rope
RLL %20rope
RRL %20rope
Caáutaïo theochieàucuoán

7. Chapter III 7







d
SSn
d
S max.
 Tínhvaø choïndaây
1. Individual wires, the ropes –an object of intricate construction- is composed of, are
subject to various stresses in service (contact, tension, bending, and twisting)
2. A mathematical treatment of all the factors controlling the wires of rope is practical
impossible
3. Codes used in rope design arebased on factors of maximum ropetension, and safety
4. Ropes are selected from applicable standards, using the relationship
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

8. Chapter III 8
 Söû duïngcaùp
-Caùp thöôøng khoâng ñöùt töùc thôøi.
-Chæ loïai boû caùp khi soá sôïi ñöùt caùp treân moät böôùc daøi vöôït soá sôïi
cho pheùp
Heä soá
an
toaøn
Keát caáucaùp
6 x19 =114 sôïi 6 x37 =222 sôïi
Beän
xuoâi
Beän
cheùo
Beän
xuoâi
Beän
cheùo
 6 6 12 11 22
6 7 14 13 26
7 8 16 15 30
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

9. Chapter III 9
Noái ñaàudaây vôùi chi tieát khaùc
(Attachment of ropes to machinery parts)
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

10. Chapter III 10
1. DAÂYCAÙP THEÙP (tt)
(wire rope)
•Söû duïng ñuùng caùp

11. Chapter III 11
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

12. Chapter III 12
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

13. Chapter III 13
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

14. Chapter III 14
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

15. Chapter III 15
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

16. Chapter III 16
Phöôngphaùp coá ñònhñaàucaùp treântang
1. DAÂYCAÙP THEÙP (tt)
(wire rope)

17. Chapter III 17
2. XÍCH (chains)
 Xích haøn (welded)
-These are widely used in hoisting installation as
pliable members
-Welded chains fall in to ordinary type and
calibrated one differing by the accuracy of
fabrication
Xích baûn leà (roller chains)
-Roller chains consist of steel plates hinge- joined by pins
-Normally the chains aretested bythe manufacturer with a load equal tohalf the breaking
one
-Roller chains are orereliable than welded
- Roller chains are heavierand more costly then weldedones

18. Chapter III 18
3. TANG CUOÁN CAÙP (drums)
 Muïcñích:
 Phaânloaïi:
Tangtruï.
Tangcoân.
Tangma saùt.
 Caáu taïo, cheá taïo:
Moätlôùp,nhieàu lôùp.
Coùraõnh,khoângcoù raõnh.
Ñuùchaøn.

19. Chapter III 19
3. TANG CUOÁN CAÙP( tt) :
1. Tang truï.
-Distinction is made between drums spooling the ropein one
layerand those onwhich the ropeis wound is morethan
onelayer
- The winding face of drum is made smooth or provided
machined helicalgrooves
Caùc thoâng soá côbaûn : L,t, D

20. Chapter III 20
3. TANG CUOÁN CAÙP( tt) :

21. Chapter III 21
3.TANGCUOÁN CAÙP (drums) tt
D (e-1)dc
L=L0+L1+2L2
L0=Z.t ={l/(D+dc)}t +(1,5-2)t
L0=Z.t ={a.H/(D+dc)}t +(1,5-2)t
t=dc+(2-3)mm

22. Chapter III 22
 Chieàu daày tang
-Tangbaèng gang: =0,02D+(6-10) mm
-Tangbaèng theùp: =1,2dc
 Tínhbeàn tang
-L/D<3: kieåm tra neùn: n=k.Smax/.t[n]
- L/D3:kieåm tra uoán, xoaén: u=Mu/Wu
x=Mx/Wx
-Toång öùng suaát: 2
x
2
un 3)(  
3.TANGCUOÁN CAÙP (drums) tt

23. Chapter III 23
3.TANGCUOÁN CAÙP (drums) tt
 Tangcoân
 Muïc ñích:
 Phaïm vi söû duïng.
maxminminmax SDSD 

24. Chapter III 24
3. TANG CUOÁN CAÙP( tt) :

25. Chapter III 25
3. TANG CUOÁN CAÙP( tt) :
3. Tangvaø puly ma saùt.
Muïcñích.
Phaïm vi söû duïng.
Capstandrums(traction –typedrum)
Therope connected to the load is
not fastened to the drum but is held fast to it
owing totraction between the drumsurface
and a fewturn of ropecoiled around the drum
Hence accordingto Euler,the tension
in the entering side ofrope connected
to the load is given:
Se=Slef

26. Chapter III 26
4. PULY (sheaves)
 Puly caùp.
(Sheave grooves)
 Puly xích(sprockets)
- Chain sheave for welded
chain
- Sprocket for roller

27. Chapter III 27
4. PULY (tt):
Ñoái vôùi xích: D0 ≥ 20d
Ñoái vôùi caùp: D ≥ (e-1)dc
Baùnkính cuûa raõnh: r = (0,6 – 0,7)dc

28. Chapter III 28
4. PULY (tt) :
-Hieäu suaát puly
 töø ñaâyta tìm ñöôïc Wc
vôùi
 Löïc caûnoå truïc:
vôùi
 Hieäu suaátpuly:
)
2
)(()
2
( 11 b
D
WSa
D
S c 
111 .
2
. S
b
D
ba
SWc 



bD
ba



2
1
121 ...
2
..2
2
S
D
d
f
a
S
D
M
W ms
ms 
04,001,0
2
sin22 


D
d
f
1
1
1
211
1
2
1
2







msc WWS
S
S
S
hS
Qh

29. Chapter III 29
DEFINITION
 A lifting tackles is a system of stationary and movable
sheaves interlinked by a pliable member in form of a wire
rope to obtain a gain in either force ( power lifting tackle)
or speed ( speed lifting tackle)
5. PALAÊNG (Lifting tackles)

30. Chapter III 30
5. PALAÊNG (Lifting tackles)
a
Q
S0 
Ñònh nghóa.
Ñaëc tính cô baûn: boäi suaát a
YÙ nghóa vaät lyù:
tangvaøodaâySoá
vaättreodaâySoá
a 

31. Chapter III 31
 Hieäu suaátpalaêng vaø
löïc caêng daây lôùn nhaát:
Khinaâng:
 1a
a21
1a
1a
2
123
12
1
...1SS....SSQ
S....S
...
SSS
SS
S

















a1
1
1
QS





5. PALAÊNG (Lifting tackles) tt

32. Chapter III 32
 
  tat
1
maxtg
1
1QS
SS


 


Löïccaùp leân tang:
t: soá puly ñoåi höôùng
5. PALAÊNG (Lifting tackles) tt

33. Chapter III 33
5. PALAÊNG (tt):
 Hieäu suaátpalaêng
 Löïccaêng caùp lôùn nhaát
h.a.S
h.Q
tg
pl 
 
 a1
1
n
ta
pl





pl
max
.a
Q
S


Coângcoùích
Coângtoaønphaàn

34. Chapter III 34
 Palaêng keùp
5. PALAÊNG (Lifting tackles) tt

35. Chapter III 35
 Caùc sô ñoà pa laêng lôïi löïc
5. PALAÊNG (Lifting tackles) tt

36. Chapter III 36
5. PALAÊNG (Lifting tackles) tt
 Caùc sô ñoà pa laêng lôïi löïc

37. Chapter III 37
5. PALAÊNG (Lifting tackles) tt
 Caùc sô ñoà pa laêng lôïi löïc

38. Chapter III 38
5. PALAÊNG (Lifting tackles)
 Caùc sôñoà pa laêng lôïi löïc

39. Chapter III 39
 A velocity lifting tackle
-The principles of velocity lifting
tackle design are basically the
same as those employed for its
power counterpart.
-When the lifting tackle frame (point
A) displaces through a distance h,
the load moves through the
distance H=ah, Where a is number
of rope part reeved through the
velocity lifting tackle.
-Hence, the velocity of hoisting the
load is
- Vload =a.V A
5. PALAÊNG (Lifting tackles) tt
-Pa laênglôïi toác-

40. Chapter III 40
5. PALAÊNG (Lifting tackles) tt
-Pa laêng lôïi toác-

41. Chapter III 41
5. PALAÊNG (Lifting tackles) tt
-Pa laêng lôïi toác-

42. Chapter III 42
5. PALAÊNG (Lifting tackles) tt
-Pa laêng lôïi toác-

43. Chapter III 43
DAÂY & CAÙC CHI TIEÁT QUAÁN, HÖÔÙNG
DAÂY
 ANY QUESTIONS ?
 ………..
 THANK YOU