Blue like the surrounding sea with massive savings potential: investing in an was an important decision for the port in Åhus, Sweden, which attaches great importance to the protection of the environment: not only in terms of emissions, but also in terms of the noise generated by large machinery. Thanks to the combination of an and state-of-the-art from SENNEBOGEN, the Swedish port professionals are now saving a maximum of energy, while at the same time increasing handling capacity by around 55 %: Since November 2020, the giant blue material handler has been unloading 550 tons of gypsum per hour, around 200 tons more than the 43-year-old harbor crane, which has now been replaced by the 875 E. The Port of Åhus handles a total of 600,000 tons of dry cargo annually, more than 70 % of which is bulk, such as gypsum or chalk.
A key feature is the Mastercab and its long-term value retention: the galvanized surface makes it less prone to corrosion caused by salt water. Also, the steel structure of the 24-meter-long equipment is protected from environmental influences with the help of a 240 μm-thick paint coating. This alone does not make it a "specialized" equipment, as it was rather custom-made and realized for the first time for this customer's project: Combining a relatively short 13.5 m boom with a 12 m stick in the "Port" version made of particularly lightweight, high-strength steel ensures a massive weight saving. With the result that overall more load capacity is possible at the stick’s end. Accordingly, the port operators can now effortlessly lift the gypsum loads weighing around 8 t with the 6 cubic meter grab in even faster cycles.
All SENNEBOGEN rail gantries are customized and have to be adapted to the existing rail dimensions in the port: In the case of Åhus, the machine runs on a 10 m wide rail gantry along the 250 m long quay. The power supply is also tailored to this length, and in this particular case is provided by a spirally winding motorized cable reel with a center feed. Along the quay there is a clever system to protect the cable: the flaps open and close automatically as the cable is directed over the funnel into the ground. This flap mechanism is controlled in its movement by the gantry itself using levers based on the zipper principle along the entire quay length. Thanks to the 390 kW electric motor and a matching low-temperature package that quickly heats the hydraulic tank and hybrid system to operating temperature, the material handler is always ready for action – even in adverse operating conditions in the far north.
The operators also had their say when the specifications were being drawn up. After all, it is their working environment in which they spend many hours every day. The keywords comfort, safety and functionality were important aspects in the project phase of the innovative material handler. Ulrik Johnsson, one of the drivers, is very satisfied with his workplace after a three-month period of getting used to it, but also with the performance of the machine in general:
"The speed of the 875 E is remarkable: it used to take one and a half working days to unload a 4,000 t bulk carrier, but today you can easily do it in one day. And the comfort in the cab is great. I hardly feel any vibrations and the noise levels have been reduced by far."