Huisman Debuts Rope Luffing Knuckle Boom Crane

Posted by Michelle Howard
Thursday, April 24, 2014
900mt Rope Luffing Knucle Boom Crane

In order to provide reliable solutions for subsea installation in increasingly deeper water and offshore construction in severe weather conditions, Huisman introduces a new patented crane type during this year’s OTC: the ‘Rope Luffing Knuckle Boom Crane’. These new active heave compensated (AHC) cranes provide unparalleled performance by combining the benefits of a normal Rope Luffing Crane and a traditional Knuckle Boom Crane. As such it offers a high lifting height and a large capacity at outreach. The main hoist system, the patented anti-twist device, and the electric drive system really set these cranes apart from other cranes in the market. The capacities of the new cranes range from 400 up to 1,200 ton and up to 5,000 meter water depth. The first crane of this type, a 900 ton Rope Luffing Knuckle Boom Crane for Subsea 7’s ‘Seven Arctic’, is scheduled for delivery in 2016. A model of this vessel including the crane will be presented at the OTC Huisman booth, no. 2327.
 


For the innovative and patented design proven key components are used. By combining these components the overall construction weight of the crane can be kept low, whilst allowing for a high lifting capacity and large lifting radius. By incorporating a knuckle in the design of the crane it is possible to reduce the pendulum of the hook and, if extended, it can allow for high lifting heights. Furthermore, the boom of the crane can be stored vertically saving valuable deck space. The main hoisting system comprises a traction and storage winch system and a separate heave compensation system. This means both lifting/lowering and heave compensation can occur simultaneously with no performance interdependency, resulting in a better overall system performance and increased safety. A failure in main hoisting system will not affect the heave compensator or the other way around.



Because the crane is fully electrically driven, the power consumption, noise levels, and the number of components are reduced. This makes the crane more reliable than hydraulically driven cranes. It also means that maintenance and operational costs are reduced. The main hoist system can be equipped with a double fall reeve system instead of a single fall reeve system, improving the life span of the wire and therewith reducing operational expenditure. Further the lifetime of the wire rope is significantly extended by the combined active and passive heave compensation system on the main hoist, since the number of sheave bends is minimized and there is no drum crushing or wire rope cut-ins on the winch. The passive mode of the heave system includes built-in redundancy, so the passive system is fail-safe. During splash zone lifts, substantial reduction of the dynamic forces on the crane and the lifted object is achieved by using the passive system as a shock absorber, and can be used to avoid any resonance during subsea lifts. Furthermore, real-time active heave compensation can take place at a very low power consumption level. The anti-twist device prevents twisting of the lower block and wire rope during subsea lifts in double fall configuration. In addition, it lowers the point of application of the wire rope, which improves the stability of the vessel and reduces the boom tip motion.

 

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter July 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

New Products

A Sea Change in Waterjet Technology

Longtime waterjet propulsion equipment provider NAMJet introduces key advancements for the workboat sector. Back in 2011, when boat builder Birdon went looking

Servowatch to Debut New Software at SMM

Integrated ship control systems supplier Servowatch said it will use SMM to launch its new automation and control software, WINMON 9.   WINMON 9 is a singular,

Buy and Sell Vessels from a Mobile Device

The maritime software development company SDSD are launching a new web based VSnP - Vessel Sale and Purchase module, enabling Sale and Purchase brokers to buy and

News

Horizon Delivers Towboat Marty Cullinan for FMT

In June 2016 Horizon Shipbuilding, Inc. of Bayou La Batre, Ala. delivered the M/V Marty Cullinan, a 120’ towboat with a retractable pilot house, to its home port of New Orleans, La.

First US LNG Shipment Goes to China

The first liquefied natural gas vessel from the lower 48 U.S. states is on its way to China, according to a Reuters interactive map on Friday, the latest sign that

Swiber Applies for Judicial Management Instead of Liquidation

Singapore oilfield services company Swiber Holdings Ltd said on Friday it has applied to place itself under judicial management instead of liquidation.   Swiber

Marine Equipment

Horizon Delivers Towboat Marty Cullinan for FMT

In June 2016 Horizon Shipbuilding, Inc. of Bayou La Batre, Ala. delivered the M/V Marty Cullinan, a 120’ towboat with a retractable pilot house, to its home port of New Orleans, La.

New Dredger for North Carolina’s Coastal Waterways

The North Carolina Department of Transportation recently took delivery of a new, fully customized cutter suction dredge, which it christened the Dredge Manteo in a ceremony held April 28,

Damen PSV for Wilson Sons Ultratug Offshore

Wilson Sons Ultratug Offshore, a joint venture between Wilson Sons and the Chilean maritime services provider Ultramar, has taken delivery of a Damen PSV 5000.

 
 
Maritime Contracts Naval Architecture Pipelines Pod Propulsion Port Authority Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1277 sec (8 req/sec)