Shanghai Sunshine Industry Technology Co., Ltd.
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Grab Type Ship Unloader for Coal and Ore Handling Ship Unloader Bulk Material Handling Ship Unloader
The ship unloader is mainly installed on the port,unloading dry bulk cargoes from vessel`s hold via grab bucket. Discharging dry bulk cargoes to the hopper, then to the conveyor belt via hopper. By conveyor belt the dry bulk cargoes are conveying to the stockyard for storaging.
The traveling of the mechanical differential grab ship unloader trolley depends on a driving motor to connect the two differential reducers through the a coupling. Through the differential transformation of the gearbox, the grab lifting is transformed into the transverse movement of the trolley.
| model | Self-propelled trolley | Main and auxiliary trolley | Mechanical differential | Electric differential |
| weight(%) | 100% | 80% | 60~65% | 60% |
| stability | 1.4 | 1.5 | 1.7~1.8 | 1.7~1.8 |
| Wire rope lengtg | 1 | 6 | 2.5 | 2.5 |
| Power consumption | 1 | 2.5 | 1.1 | 1.2 |
| Operating cost(%) | 100% | 95% | 90% | 90% |
| Fault and maintenance | Breakdown rate high and hard to maintain | Breakdown rate low and easy to maintain but wire rope system is complicated | Wire rope system is simple, easy to change gear reducer is specific design,hard to maintain and change | Wire rope system is simple,gear reducer is standard,easy to maintain,electrical system is complicated |
| Cost of fundamental and facilities(%) | 100% | 95% | 85% | 85% |
| model | Mechanical differential | Electric differential |
| weight(t) | 1100 | 1050 |
| Rail distance(m) Wheel distance(m) | 18~28 18 | 18~28 18 |
| No of wheel Wheel pressure T Driver KW | 40 50 7.5*10 | 40 50 7.5*10 |
| Luffing mechanism KW | 90~110 | 90~110 |
| Four drums mechanism KW | Start 2X500KW Runing 315KW | 4*400 |
| Specification of ship unloader | ||||||||||||||||
| vessel | capacity | unload time | lift capacity of grab | weight of single grab | cycle times | one cycle | density of bulk material | rail distance | rail | wheel pressure | extending reach distance of grab | rear reach distance of grab | hoisting speed | lowering speed | trolley speed | traveling speed |
| DWT | t/h | hours | T | T | s | t/m3 | m | kN | m | m | m/min | m/min | m/min | m/min | ||
| 1000 | 340 | 2.94 | 10 | 5.5 | 61.82 | 58.23529412 | 0.85 | 16 | QU80 | 350 | 23 | 21 | 90 | 100 | 120 | 25 |
| 5000 | 500-2000 | 2.5~10 | 12.5~48 | 7.3~28 | 67.42~71.43 | 52.56-53.4 | 0.8~0.9 | 10.5~20 | QU80~100 | 245~600 | 24~28 | 8~16 | 100~160 | 120~190 | 150~240 | 20 |
| 8000 | 1000 | 8.00 | 25 | 14.8 | 67.57 | 53.28 | 20 | QU100 | 350 | 28 | 17 | 135 | 150 | 180 | 20 | |
| 20000 | 800-1000 | 20.00 | 22~30 | 13.3~14.8 | 55.56~67.57 | 53.28~64.8 | 0.85 | 16~22 | QU80~120 | 330~530 | 24~38 | 21 | 12~135 | 135~150 | 180 | 20~25 |
| 30000 | 1250 | 24.00 | 32 | 19.6 | 63.78 | 56.448 | 0.95 | 16 | QU100 | 505 | 33 | 14 | 135 | 150 | 220 | 25 |
| 35000 | 800~1600 | 21.88~43.75 | 22~40.5 | 12.8~25 | 62.52~76.19 | 54~57.6 | 0.85~0.95 | 14~24 | QU80~100 | 330~530 | 27~31 | 11~19 | 120~135 | 135~180 | 180~220 | 20~25 |
| 50000 | 1250~1650 | 33.3~40 | 32~40 | 19.5~25 | 60~67.35 | 56.16~60 | 0.85~0.95 | 22~26 | QU100~120 | 500~520 | 30~33 | 17~19 | 150~200 | 180~240 | 180~220 | 20~25 |
| 70000 | 1250~1750 | 40~56 | 34~42 | 20.5~25.75 | 52.08~68 | 53~69.12 | 0.85~0.9 | 22~30 | QU100~120 | 500~600 | 32~40 | 16.5~27 | 160~220 | 190~240 | 180~240 | 20~25 |
| 100000 | 1000~1800 | 55.56~100 | 30~46 | 18~27.6 | 55.56~75.12 | 48~64.8 | 0.8-1 | 22~26 | QU120 | 450~600 | 30~38 | 17~20 | 135~180 | 150~220 | 180~240 | 25 |
| 150000 | 1800~2100 | 71.42~83.33 | 45~52 | 27.2~31.5 | 63.16~66.67 | 54~57 | 0.90~2.4 | 24~28 | QU120 | 600~736 | 39~41.5 | 19~24 | 160~200 | 190~240 | 200~240 | 20~25 |
Main structure of bridge-type grab ship unloader
Mechanism of bridge-type grab ship unloader
1.Traveling mechanism
2. Main structure of bridge-type ship unloader
3. Hopper system
4. Grab bucket hoisting mechanism(mechanical differential four drums)
5.Grab bucket(wire rope reeving system)
6. Luffing mechanism
7.Wire rope reeving system of luffing mechanism
8. Cantilever safety hook device
9.Wire rope reeving system of wire rope support trolley
Overview of production process