Work in now well underway for Cargotec's breakthrough order for the delivery of 24 bulk cargo versions of its MacGregor range of electric-drive cranes. The cranes are destined for a series of eight 16,900 dwt bulk carriers under construction at Taizhou Sanfu Ship Engineering, in China, for Polish shipowner, Polsteam.
Polsteam is one of the world's biggest dry bulk shipowners and operators and is otherwise known as Polska Zegluga Morska (PZM). It specified three 30-tonne SWL cranes for each of the bulkers, which will be installed from the end of 2010 to 2012.
"This is a breakthrough in the bulk carrier market as it is important recognition of our new environmentally-friendly GLBE electric crane, which is based on proven MacGregor designs offering improved overall efficiency and low power consumption," says Paul Soderstedt, Cargotec sales manager for bulk ships.
Cargotec launched the MacGregor GLBE crane series earlier this year. It is built upon variable frequency drive and inherits the proven characteristics of the previous generation of wire-luffing cranes. All machinery is enclosed within the crane housing, ensuring safe operation and ease of maintenance.
"MacGregor variable frequency drive cranes are accurate, and they eliminate the need for hydraulic oil. They are also energy efficient in operation and have lower power consumption, translating to lower running costs and ultimately a lower environmental impact," highlights Per-Erik Nilsson, Cargotec director of marketing and sales. "They also offer shorter operation times, allowing full
speed/full load in all modes."
Each crane is delivered as a complete unit tested electrically and mechanically before delivery, ready for installation on board. Access to the driver's cab follows the proven internal route through the deck mounting and base of the crane.
Other crane developments from the company include the introduction of a new four-wire rope heavy-duty bulk-handling MacGregor crane, the 50-tonne SWL version of the K4. "Market demand for more and more handling capacity from bulk cranes has asked for this new workhorse," says Anders Berencsy, Cargotec cranes sales manager. "Indonesia and India are two growing markets that are asking for increases in capacities. When it comes to both barge cranes and transfer terminals, this crane will be useful.
"A capacity of 50 tonnes, including grab, was defined, along with a SWL of 52.5 tonnes in general cargo operation, after feed-back was received from leading operators with heavy-duty cranes," he explains.
K4-cranes are outfitted with a mechanical grab for handling iron ore, coal, grain and all other kinds of bulk material. The mechanical grab, coupled with effective crane speeds, provide efficient tools for moving bulk material. They will be available in jib outreaches from 26m to 36m.
For many years, MacGregor cranes have used a proven design module for construction. "This design forms the basis of the new 50-tonne K4-crane," explains Mr Berencsy. "We know this designs works, and understand that this is particularly important when you have a crane that can be expected to work up to 5,000 hours every year.
"Our philosophy to have all machinery well weather-protected in the crane house will also be used for this crane. This has been proven with excellent results, as both iron ore and coal can create a lot of dust that can get into vital machinery parts if they are outside the crane."
To improve the availability of the crane, two pump units have been installed. "If one pump stops, the driver can easily disconnect the failed unit and still run the crane with the other one. However, the speed will be reduced but the crane is operational! As an option, the hoisting speed can be increased up to 20 per cent with an extra pump for each pump unit".
The driver's cabin is extended from the crane house to give the driver a better overview of the whole operation. As an optional extra, cameras can be mounted on the jib top with displays in the cabin to increase the driver's visibility even further. "Two air-conditioning units and an extra-comfortable seat will give the driver an excellent working environment when operating the crane," says Mr Berencsy.
Other possible options are automatic greasing of the slewing bearing and for an operational log to be stored on the crane computer.
Cargotec, Sörnäisten rantatie 23 P.O. Box 61, FI-00501 Helsinki, Finland
Phone: +358 (0) 204 55 11
K4crane. Four-wire rope heavy-duty bulk-handling cranes can be expected to work up to 5,000 hours every year
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