Offshore staff
BETHLEHEM, Pennsylvania --Bosch Rexroth has introduced a new generation of rotating Active Heave Compensators (AHC). This system aims to increase the workable hours at sea under heavy weather conditions at increasingly deeper depths.
The AHC system is based on secondary technology for the control-led handling of loads between 22 and 110 tons and can compensate for over 90% of the ship movements, the company says.
The secondary drive technology, combined with energy retrieval, storage and recycling, results in compact systems with a reduction on the installed power. The four quadrant drive principle offers flexible operation. The integration of winch drive and an active heave compensator in one system makes additional deck equipment redundant.
The drive system consists of specially developed adjustable axial piston motors, the aggregate, the batteries to store energy, the motion reference unit, and the necessary interfaces. The controls with dedicated software enable the winch operator to go through the different phases of the procedure fully controlled. The following operation modes can be selected:
Active compensation mode
Constant tension mode
Empty hook mode
Shock absorber mode
Standby mode
Off mode.The complete system is equipped with the required redundancy and safety measures.
6/6/2007
