Cargo Crane with an Ex-center Arm
---- for bulk carriers
YFM cargo crane with ex-center arm adopts the eccentric arm technology based on the traditional bulk cargo crane to expand the working radius and improve work efficiency. The ship crane is often equipped with a wireless remote control grab and is used to operate offshore bulk carriers.
The traditional cargo crane's maximum lifting capacity during grab operation is 25 tons, and the working radius is 30 meters.
An eccentric arm with a length of 6 to 10 meters can extend the working radius of the cargo crane with ex-center arm, making the total working radius 36 to 40 meters, respectively.
This means all cargo holds can be reached without repositioning the barge during unloading. Compared with traditional cranes, the turnover efficiency can be increased by approximately 20%
Design Drawing
3D Model
Design conditions
Conditions
| Max. heel/trim | 5°/2° |
| Ambient working temperature | –30°C to +45°C |
| Max. humidity | 93% |
| Max. wind speed | 20 m/s (working condition) |
| Max. wind speed | 63 m/s (parking condition) |
Motor
| Class of protection | IP 56 | |
| Class of insulation | F | |
| Nominal output | 50Hz/470 kW | 60Hz/540 kW |
| S6-40%ED | S6-40%ED | |
| Nominal current | 848 A | 866 A |
| Starting current | 1762 A | 1674 A |
| Power supply | 380V, 3P | 380V, 3P |
| Rated reverse power(depending on load cycle approx.) | 120 kW | 120 kW |
Main technical parameters
Grab Crane
| SWL | Hook | 30t |
| Grab | 25t | |
| Lifting height | 60m/min (0-30t) | |
| 0-78m/min (0-15t) | ||
| Luffing time | 60s | |
| Slewing time | 1.1r/min | |
| Max. working radius | 30m | |
| Min. working radius | 5m | |
| Eccentric boom | 10m | |
| Lifting height | 35m | |
| Trim/List | 5°/2° | |
| Voltage | 400v/50Hz/3P | |
| Power | ~2x250kw(S1) | |
| Sea state | Significant wave height 0.6m-1.3m | |
| Deadweight | ~175,000kg | |
Grab Bucket for Crane
| Model. | RC25.0-(6-12)-9.4 | |
| Crane lifting capacity | 25T | |
| Crane lifting capacity | 6.0-12.0 m3 | |
| Grab dead weight | 9400kg | |
| Material accumulation angle | 30~40° | |
| Density | 2.5~0.8t/m3 | |
| Sheave dimension | 650mm | |
| Ropes multiple | 3 | |
| Ropes dimension | 32mm | |
| Steel wire rope length | 11.5mm | |
| Steel wire rope travel | 4850mm | |
| Overall dimension | A | 4587mm |
| B | 4302mm | |
| C | 3030mm | |
| D | 4010mm | |
| E | 3500mm | |
Crane Installation Layout Diagram
Installation schematic diagram of the cargo crane with ex-center arm on bulk carrier
Details
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