Design Features
□Bearings are roller ones and shafts are made of alloy steel.
□On the drum there is a spiral groove. The low-speed & high-speed ends of drum shaft are equipped with a ventilating air clutch. The brake rim (or disc) is water cooled and the surface is intermediate frequency quenched, which increases long service life.
□The contours of the sprocket teeth are intermediate frequency quenched. All clutches of shifting gears are of involute spline type.
□The main brake can be either a band or disc brake system. The auxiliary brake can be realized by an eddy current brake (water or air cooled)
Basic parameters of Mechanical Driven Drawworks
|
Modle
|
JC40
|
JC50
|
JC70
|
|
Nominal drill depth
|
￠114mm drill pipe
|
2500-4000
|
3500-5000
|
4500-7000
|
|
￠127mm drill pipe
|
2000-3200
|
2800-4500
|
4000-6000
|
|
Rated input power kW(hp)
|
735(1000)
|
1100(1500)
|
1470(2000)
|
|
Rated speed of motor r/min
|
880/970
|
970
|
970
|
|
Dia. of wire line mm(in)
|
32(1)
|
35(1)
|
38(1 )
|
|
Max.pull of fast line kN
|
275
|
340
|
485
|
|
Drum(Dia x Length) mm(in)
|
Band brake
|
640 x 1237
(25x48)
|
685 x 1245
(27x49)
|
770x 1439
30x56
|
|
Brake rim (Dia. x Width) mm(in)
|
1168x265
(46x10)
|
1270x267
(50x10)
|
1370x267
(54x10)
|
|
Drum(Dia x Length) mm(in)
|
Disc brake
|
640 x 1139
(25x44)
|
685 x 1138
(27x44)
|
770x 1361
30x53
|
|
Brake rim (Dia. x Width) mm(in)
|
1500x76
(59x3)
|
1600x76
(63x3)
|
1600x76
(63x3)
|
|
Auxiliary brake
|
DS40
|
DS50
|
DS70
|
|
Overall Dimension
(L×W×H) mm
|
6450×2560
×2482
|
7000×2955
×2780
|
7930×3194×2930
|
|
Weight kg
|
28240
|
45210
|
43000
|
|
