Gottwald’s new model and new drive

Gottwald Port Technology GmbH (Gottwald) has launched its Model 3 harbour crane, the successor to the Generation 4, HMK 260. The Model 3 takes over as the entry level model for the 100-tonne class in the Generation 5 Harbour Cranes range.

"The model has improved working speeds and has a greater radius than its predecessor, and it also features innovative drive technology and design, such as the 3-phase-powered hoist and slewing gear units and a broad range of options, including an energy-efficient hybrid drive,”said Dr. Mathias Dobner, Executive Vice President and Member of the Executive Committee of Demag Cranes AG

As the entry model in the 100-tonne Harbour Cranes the Model 3, with its maximum lifting capacity of 100 tonnes up to a radius of 20 m, is the youngest addition to Gottwald's medium-sized crane family. It is particularly suited to rapid container and general cargo handling alongside vessels up to standard class. For handling bulk materials it has a 34-tonne and 28-tonne motor grab curve with A7 and A8 classification respectively.

With its maximum radius of 46 m, an installed maximum output of 895 kW and hoisting speeds of up to 120 m/min, Model 3 offers a radius 2 m more than that of its predecessor, the Generation 4, HMK 260, and increased working speeds to enable improved productivity.

Model 3 is available as a rubber-tyred mobile harbour crane, a rail mounted portal harbour crane, a floating crane on a barge and as a pedestal-mounted stationary crane.

Gottwald is also pioneering new drive concepts by using 3-phase-powered hoist and slewing gear units. "In this field, we are taking full advantage of technical progress and economic efficiency in 3-phase technology for drive motors of a size suitable for these applications," says Dr. Dobner.

According to the company the new, optional Gottwald hybrid drive is the key to improved efficiency, reductions in fuel consumption in a double-digit percentage range and lower exhaust gas emissions. A further benefit of the new hybrid drive is that the diesel engine has quieter running characteristics, which reduces noise emissions.

With Gottwald's hybrid drive – a combination of an on-board diesel-powered generator and electrostatic short-term energy storage – the energy recovered during the crane's lowering and braking actions is stored and then made available to the crane's power system for the next work cycle. Friction free double-layer capacitors (ultracaps) store the energy as electricity so it does not have to be converted: they have a high efficiency rating, power density and cycle rate, which makes them ideally suited to the tough conditions of professional crane operation. Together with the hybrid drive, the use of dynamic brake resistors improves energy management by producing significant fuel savings.

“We are convinced that our new Model 3 is a milestone – not just in the many facetted 100-tonne cargo-handling segment, but also in terms of energy management, emphasised Dr. Dobner.
(Source:www.container-mag.com)