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 Reporter July 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Vestas Profit Beats Forecast

Danish wind turbine maker Vestas Wind Systems posted much higher than expected second-quarter earnings and slightly increased its guidance for the full year, signaling

MV Cape Ray Signals DTRA 'Mission Complete'

The Defense Threat Reduction Agency announces the successful completion of the Cape Ray's mission to destroy Syria's chemical weapons components at sea. The Defense Threat Reduction Agency/U.

HK's COSCO International Reports Strong Profit Growth

For the  six months ended 30th June 2014, shipping services provider COSCO International has announced that its 2014 Interim Results show strong profit growth with Net Profit up 45% YOY.

News

Shipping Industry Issues Ebola Virus Red Alert

Three global shipping organisations have issued guidance to their members on the risks posed to ships’ crews calling in countries affected by the Ebola virus, and

Port of Long Beach to the Rescue of Birds

The Port of Long Beach announced Tuesday that it is expanding its partnership with International Bird Rescue, a global expert in oiled wildlife emergencies and aquatic bird care,

Mærsk Putting Valuable Experience to Good Use

The Mærsk Deliverer rig team has initiated seven local acceleration programmes in Angola. The goal is to train and develop local talent to take on increasingly

Marine Equipment

HK's COSCO International Reports Strong Profit Growth

For the  six months ended 30th June 2014, shipping services provider COSCO International has announced that its 2014 Interim Results show strong profit growth with Net Profit up 45% YOY.

BWTS SeaCURE Gains USCG AMS Acceptance

Evoqua Water Technologies LLC says that its SeaCURE Ballast Water Treatment System (BWTS) has been granted AMS Acceptance in all salinities. System highlights

Mærsk Putting Valuable Experience to Good Use

The Mærsk Deliverer rig team has initiated seven local acceleration programmes in Angola. The goal is to train and develop local talent to take on increasingly

Deck Machinery

Markey Equips Research Vessel Sally Ride

Named for the first American woman launched into space aboard the Space Shuttle Challenger, the Research Vessel Sally Ride was commissioned August 9 at Dakota Creek Industries (Anacortes, Washington).

NAVPLAY’S Full Featured Notification System

iPad In-App Environments Provide a Wealth of Safety and Assessment Capabilities Capannoli, Italy – NavPlay, an innovative manufacturer of iPad apps for boaters,

Rapp Marine Hires Vatnehol as CEO

Helge Vatnehol has been appointed Group CEO of Rapp Marine. Vatnehol comes from the position of Senior Vice President Offshore Deck Machinery in Rolls Royce and takes over on September 1, 2014.

 
 
Maritime Contracts Naval Architecture Navigation Port Authority Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | 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: 0.2988 sec (3 req/sec)