Gearboxes and controls for new design WFSV
The Northumberland UK based specialist aluminium boatbuilder Alnmaritec is fitting four shipsets of ZF 2000 V gearbox systems for its new Wave Captain class Wind Farm Support Vessels.
The first of these 18.9m vessels was launched in May and the second in July.
In addition, ZF Services UK Ltd is supplying 9000 series electronic control systems from ZF Marine for each of the vessels, which are powered by twin Doosan 4V222TI 880 bhp diesel engines coupled to ZF 2000 V gearboxes driving twin five blade propellers to enable a cruising speed of 24 knots.
“More than half of the 150 workboats we’ve built over the past 25 years have used ZF transmissions, said Alnmaritec’s managing director Chris Millman. “It was therefore a straightforward decision to call on ZF Services UK to supply ZF Marine gearboxes for our new Wave Captain vessels.”
Alnmaritec’s Wave Captain design is a derivative of the larger Wave Master class vessels which have proved highly successful in service. It features the unique high efficiency hull form developed by Alnmaritec over the last year using extensive CFD modelling and towing tank testing.
ZF 2000 V 10° V-drive, remote mount marine transmissions are compatible with all kinds of engines and propulsion systems, including waterjets, surface-piercing propellers and controllable pitch propellers. Reliable, compact, lightweight and simple to install, this three shaft reverse reduction transmission has a hydraulic clutch mounted on the input shaft and a further one on the reverse shaft. Suitable for twin engine installation the ZF 2000 V offers smooth and reliable shifting and is designed to take maximum propeller thrust astern and ahead. Other features include an emergency ‘get home’ capability and SUPERSHIFT clutch control.
The new and highly versatile 9000 series of electronic controls systems from ZF Marine includes both MicroCommander and ClearCommand control systems and can be configured for use with mechanical engines and electric gearboxes; electric engines and mechanical gearboxes; or both mechanical or electrical.
Engine synchronisation is standard, which automatically maintains the same speed on multiple engines, therefore increasing operating efficiency and improving fuel economy while reducing noise and vibration. One lever operation is available, allowing control of multiple engines and transmissions with a single lever. There is also the ability to support multiple control stations and the option to use a handheld control unit. A full range of shaft speeds remains available from any station, without additional switches.
In addition, the trolling feature controls clutch slippage while maintaining slow engine speed and thereby enhancing fuel economy. Speed/shift sequence protection allows shifting from full ahead to full astern in one motion while preventing damage to the engine or gear. Designed with safety in mind, this sequencing technology allows an instant response to emergency situations.
