Belt width
|
Idler length
|
Troughing angle of the belt
|
||||||
(mm)
|
(mm)
|
0°
|
20°
|
25°
|
30°
|
35°
|
40°
|
45°
|
500
|
200
|
39
|
72
|
79
|
85
|
90
|
94
|
97
|
650
|
250
|
69
|
132
|
145
|
155
|
164
|
171
|
176
|
800
|
315
|
108
|
207
|
226
|
243
|
257
|
268
|
276
|
1000
|
380
|
174
|
337
|
369
|
396
|
419
|
437
|
449
|
1200
|
465
|
256
|
493
|
540
|
580
|
614
|
640
|
658
|
1400
|
530
|
353
|
685
|
750
|
806
|
853
|
888
|
913
|
1600
|
600
|
466
|
907
|
993
|
1067
|
1128
|
1175
|
1208
|
1800
|
670
|
594
|
1160
|
1270
|
1365
|
1443
|
1502
|
1544
|
2000
|
740
|
739
|
1443
|
1581
|
1699
|
1795
|
1869
|
1920
|
2200
|
800
|
917
|
1802
|
1974
|
2121
|
2241
|
2332
|
2394
|
2400
|
870
|
1115
|
2196
|
2406
|
2585
|
2730
|
2840
|
2915
|
2600
|
940
|
1332
|
2628
|
2880
|
3094
|
3268
|
3399
|
3486
|
2800
|
1000
|
1568
|
3104
|
3402
|
3654
|
3859
|
4012
|
4113
|
3000
|
1070
|
1824
|
3615
|
3961
|
4255
|
4492
|
4670
|
4788
|
3200
|
1140
|
2099
|
4164
|
4563
|
4902
|
5174
|
5379
|
5513
|
Rating
|
Thickness (mm)
|
Weight (kg/m²)
|
*Please add 1,1 kg per square meter and 1 mm thickness of cover! For V self-extinguishing resp. FRAS grades, use 1,5 kg/m²/mm! For exact figures please consult the belt manufacturer! |
St 1000
|
4,0
|
8,5
|
|
St 1250
|
4,0
|
10,5
|
|
St 1600
|
5,5
|
12,6
|
|
St 2000
|
5,5
|
13,6
|
|
St 2500
|
7,0
|
18,7
|
|
St 3150
|
8,0
|
21,2
|
|
St 4000
|
9,0
|
26,0
|
|
St 4500
|
9,5
|
28,5
|
|
St 5000
|
10,0
|
30,8
|
|
St 5400
|
10,5
|
31,8
|
|
St 6300
|
12,0
|
41,8
|
|
St 6800
|
13,5
|
43,4
|
|
St 7500
|
14,5
|
44,8
|
|
St 8500
|
15,0
|
46,6
|
|
St 10000
|
16,0 | ||
| TEXTILE BELT WEIGHT AND THICKNESS (X grade) | |||
| Rating (N/mm) | Thickness (mm) | Weight (kg/m²)* | *Please add 1,1 kg per square meter and 1 mm thickness of cover! Example: 1200 / EP 800/4 6+3: (5,5+(9x1,1))x1,2=18,5 kg/m
For exact figures please consult the belt manufacturer!
|
| EP 400/2 | 3,5 | 4,4 | |
| EP 630/2 | 4,5 | 5,4 | |
| EP 800/2 | 5,0 | 5,9 | |
| EP 400/3 | 3,0 | 3,4 | |
| EP 500/3 | 3,5 | 3,7 | |
| EP 630/3 | 4,0 | 4,3 | |
| EP 500/4 | 3,8 | 4,9 | |
| EP 630/4 | 4,1 | 5,2 | |
| EP 800/4 | 4,5 | 5,5 | |
| EP 800/5 | 5,0 | 6,3 | |
| EP 1000/5 | 5,5 | 7,1 | |
| EP 1250/5 | 7,0 | 8,9 | |
Condition
|
Steel pulley
|
PU lagging
|
Rubber lagging
|
Ceramic lagging
|
dry
|
0.35 - 0.4
|
0.35 - 0.4
|
0.4 - 0.45
|
0.4 - 0.45
|
wet (water)
|
0.1
|
0.35
|
0.35
|
0.35 - 0.4
|
wet (soiled)
|
0.05 - 0.1
|
0.2
|
0.25 - 0.3
|
0.35
|
Ash, dry
|
0.5 - 0.7
|
Ash, wet
|
0.9
|
Basalt
|
1.6
|
Bauxite, crushed
|
1.3
|
Cement
|
1.35
|
Clay, dry
|
1.8
|
Coal, r.o.m.
|
1.1 - 1.4
|
Coal, fine
|
0.7 - 0.9
|
Copper ore
|
2.15
|
Gravel
|
1.8 - 2.2
|
Gold ore
|
1.2
|
Lignite
|
0.65 - 0.85
|
Limestone
|
1.5 - 1.9
|
Iron ore
|
2.1
|
Mineral salt
|
1.0
|
Oil sand
|
1.5
|
Overburden
|
1.5 - 1.8
|
Phosphate
|
1.2 - 1.5
|
Potash
|
1.35
|
Rock debris
|
1.8
|
Salt
|
1.2 - 1.5
|
Sand, dry
|
1.6
|
Sand, wet
|
2.0
|
Cement
|
23
|
|||||||||
Coal, r.o.m.
|
17
|
|||||||||
Coal, fine
|
16
|
|||||||||
Ore
|
18
|
|||||||||
Gravel
|
15
|
|||||||||
Limestone
|
18
|
|||||||||
Salt
|
20
|
|||||||||
Sand, dry
|
16
|
|||||||||
Sand, wet
|
20
|
|||||||||
| The coefficient jSt as per DIN 22101 provides the relationship of the dynamical angle of inclination. For bulk materials with higher inner friction, the following guide values can be used: | ||||||||||
| Inclination | 2° | 4° | 6° | 8° | 10° | 12° | 14° | 16° | 18° | 20° |
| Coefficient (φSt) | 1.0 | 0.99 | 0.98 | 0.97 | 0.95 | 0.93 | 0.91 | 0.89 | 0.85 | 0.81 |
| Gradient angle |
2°
|
4°
|
6°
|
8°
|
10°
|
12°
|
14°
|
16°
|
18°
|
20°
|
| Coefficient (φSt) |
1.0
|
0.99
|
0.97
|
0.97
|
0.95
|
0.93
|
0.91
|
0.89
|
0.85
|
0.81
|
Belt width
|
Idler length
|
Belt width on
|
Belt troughing angle
|
|||||
(mm)
|
(mm)
|
side idlers (mm)
|
25°
|
30°
|
35°
|
37,5°
|
40°
|
45°
|
500
|
200
|
150
|
63
|
75
|
86
|
91
|
96
|
106
|
650
|
250
|
200
|
85
|
100
|
115
|
122
|
129
|
141
|
800
|
315
|
243
|
102
|
121
|
139
|
148
|
156
|
171
|
1000
|
380
|
310
|
131
|
155
|
178
|
189
|
199
|
219
|
1200
|
465
|
368
|
155
|
184
|
211
|
224
|
236
|
260
|
1400
|
530
|
435
|
184
|
218
|
250
|
265
|
280
|
308
|
1600
|
600
|
500
|
211
|
250
|
287
|
304
|
321
|
354
|
1800
|
670
|
565
|
239
|
283
|
324
|
344
|
363
|
400
|
2000
|
740
|
630
|
266
|
315
|
361
|
384
|
405
|
445
|
2200
|
800
|
700
|
296
|
350
|
402
|
426
|
450
|
495
|
2400
|
870
|
765
|
323
|
383
|
439
|
466
|
492
|
541
|
2600
|
940
|
830
|
351
|
415
|
476
|
505
|
534
|
587
|
2800
|
1000
|
900
|
380
|
450
|
516
|
548
|
579
|
636
|
3000
|
1070
|
965
|
408
|
483
|
554
|
587
|
620
|
682
|
3200
|
1140
|
1030
|
435
|
515
|
591
|
627
|
662
|
728
|
Coeff. of friction
|
170°
|
175°
|
180°
|
185°
|
190°
|
195°
|
200°
|
205°
|
210°
|
215°
|
220°
|
225°
|
230°
|
235°
|
240°
|
245°
|
0.05
|
6.25
|
6.06
|
5.88
|
5.71
|
5.55
|
5.39
|
5.24
|
5.10
|
4.97
|
4.85
|
4.72
|
4.61
|
4.50
|
4.39
|
4.29
|
4.20
|
0.10
|
2.90
|
2.80
|
2.71
|
2.62
|
2.54
|
2.47
|
2.39
|
2.32
|
2.26
|
2.20
|
2.14
|
2.08
|
2.02
|
1.97
|
1.92
|
1.87
|
0.15
|
1.78
|
1.72
|
1.66
|
1.60
|
1.55
|
1.50
|
1.45
|
1.41
|
1.36
|
1.32
|
1.28
|
1.25
|
1.21
|
1.18
|
1.14
|
1.11
|
0.20
|
1.23
|
1.19
|
1.14
|
1.10
|
1.06
|
1.03
|
0.99
|
0.96
|
0.92
|
0.89
|
0.87
|
0.84
|
0.81
|
0.79
|
0.76
|
0.74
|
0.25
|
0.91
|
0.87
|
0.84
|
0.81
|
0.77
|
0.75
|
0.72
|
0.69
|
0.67
|
0.64
|
0.62
|
0.60
|
0.58
|
0.56
|
0.54
|
0.52
|
0.30
|
0.70
|
0.67
|
0.64
|
0.61
|
0.59
|
0.56
|
0.54
|
0.52
|
0.50
|
0.48
|
0.46
|
0.44
|
0.43
|
0.41
|
0.40
|
0.38
|
0.35
|
0.55
|
0.52
|
0.50
|
0.48
|
0.46
|
0.44
|
0.42
|
0.40
|
0.38
|
0.37
|
0.35
|
0.34
|
0.33
|
0.31
|
0.30
|
0.29
|
0.40
|
0.44
|
0.42
|
0.40
|
0.38
|
0.36
|
0.34
|
0.33
|
0.31
|
0.30
|
0.29
|
0.27
|
0.26
|
0.25
|
0.24
|
0.23
|
0.22
|
0.45
|
0.36
|
0.34
|
0.32
|
0.31
|
0.29
|
0.28
|
0.26
|
0.25
|
0.24
|
0.23
|
0.22
|
0.21
|
0.20
|
0.19
|
0.18
|
0.17
|
Belt width (mm)
|
Idler diameter (mm)
|
|||
108
|
133
|
159
|
168
|
|
1000
|
17,0
|
24,5
|
26,5
|
35,0
|
1200
|
19,0
|
29,0
|
32,5
|
40,0
|
1400
|
21,0
|
31,5
|
35,5
|
45,0
|
1600
|
23,5
|
34,5
|
39,0
|
50,0
|
1800
|
25,5
|
35,0
|
42,5
|
54,0
|
2000
|
28,0
|
37,5
|
47,0
|
62,0
|
| f VALUES (artificial friction coefficient f), Examples | ||
| Installation | Conditions | f value |
| Horizontal, belt speed of 5 m/s, low rolling resistance belt | Favorable, easily rotating idlers, good tracking |
0.012
|
| Horizontal, belt speed of 5 m/s, X grade belt | As above | 0.016 |
| As above | "Normal" | 0.020 |
| As above | Unfavorable conditions, low temperature | 0.026 |
| Steep decline, belt speed 5 m/s | As a safety measure, downhill conveyors shall be calculated with a substantially lower f value than driven conveyors. | 0.014 |
| The f value is negatively influenced by higher troughing angles, higher belt speeds, smaller idler diameters, poorly aligned installations etc. | ||
| COEFFICIENT C | |||||||||
| Length (m) | 80 | 200 | 300 | 500 | 800 | 1000 | 1500 | 2500 | 5000 |
| C | 1,92 | 1,45 | 1,31 | 1,2 | 1,17 | 1,09 | 1,05 | 1,04 | 1,03 |
| FACTOR c | |||||
| Belt speed (m/s) | 2 | 3 | 4 | 5 | 8 |
| c | 1,92 | 1,45 | 1,31 | 1,2 | 1,17 |
| MINIMUM CURVES FOR PIPE CONVEYOR BELTS (guide numbers) | |||||
| Carcass | Diameter d (mm) | Curve radius | |||
| up to 25° | 25°- 50° | 50° - 75° | 75° - 100° | ||
| Polyamide (PP) | 150 - 300 | 300 d | 400 d | 500 d | 600 d |
| 350 - 500 | 400 d | 500 d | 600 d | 700 d | |
| Polyester/Polyamide (EP) | 150 - 300 | 400 d | 500 d | 600 d | 700 d |
| 350 - 500 | 500 d | 600 d | 700 d | 800 d | |
| Aramide (D) | 150 - 300 | 500 d | 600 d | 700 d | 800 d |
| 350 - 500 | 600 d | 700 d | 800 d | 900 d | |
| Steel cord (St) | 150 - 300 | 700 d | 800 d | 900 d | 1000 d |
| 350 - 500 | 800 d | 900 d | 1000 d | 1100 d | |
| MINIMUM BELT TURNOVER LENGTH (guide values in m) | |||
| Max. belt width B (mm) | Type of turnover | Textile conveyor belts | Steel cord conveyor belts |
| 1200 | unguided | 10 x B | - |
| 1600 | guided | 12,5 x B | 22 x B |
| 2400 | supported | 10 x B | 15 x B |
| 3200 | |||
Such dimensions are still up in the air though. This huge machine weighs 250 tons. A new standard for conveyor belts used in underground coal mining. mechnical handling system
ReplyDelete