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 May 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Baltic Mercur II makes maiden voyage to Antwerp

This week Atlantic Ro-Ro Carriers (ARRC) celebrates the maiden voyage of the Baltic Mercur II via the port of Antwerp as part of their regular transatlantic service to the US Gulf.

USCG Provides Safety Tips to Paddlesports Enthusiasts

As the boating season unofficially begins, the 9th Coast Guard District is reminding paddlesport enthusiasts to take precautions to ensure safe trips and increase

USS George Washington Completes Carrier Qualifications

Carrier Air Wing (CVW) 5 and the Nimitz-class aircraft carrier USS George Washington (CVN 73) completed its carrier qualifications (CQ), May 23. CQ allows

New Products

Baltic Mercur II makes maiden voyage to Antwerp

This week Atlantic Ro-Ro Carriers (ARRC) celebrates the maiden voyage of the Baltic Mercur II via the port of Antwerp as part of their regular transatlantic service to the US Gulf.

Alaska, Washington to build Arctic Icebreakers

Senator Lisa Murkowski, Alaska, and Senator Maria Cantwell, Washington, have introduced a bill that would authorize the Navy to build up six icebreakers for use by the U.

DMW Marine Takes the Lead in Military Cranes

DMW Marine Group, LLC. has completed a number of projects for the U.S. Navy and foreign Navies in recent years, claiming a place as a go-to supplier for Navy departments globally.

News

Dortmund Port's Throughput Up

In 2014, Dortmund’s combined goods throughput on ships and trains amounted to 5.7 million tonnes, compared to 5.3 in the previous year. 2.9 million tonnes (+600,000) of this was ship related.

Baltic Mercur II makes maiden voyage to Antwerp

This week Atlantic Ro-Ro Carriers (ARRC) celebrates the maiden voyage of the Baltic Mercur II via the port of Antwerp as part of their regular transatlantic service to the US Gulf.

USCG Provides Safety Tips to Paddlesports Enthusiasts

As the boating season unofficially begins, the 9th Coast Guard District is reminding paddlesport enthusiasts to take precautions to ensure safe trips and increase

Marine Equipment

DNV GL’s Synergi to Manage Siem Offshore Newbuilding Projects

Siem Offshore has chosen DNV GL’s Synergi Project to manage nine newbuilding projects. Synergi Project software The software is used to optimize the collaboration

USS George Washington Completes Carrier Qualifications

Carrier Air Wing (CVW) 5 and the Nimitz-class aircraft carrier USS George Washington (CVN 73) completed its carrier qualifications (CQ), May 23. CQ allows

Viking Orders 2 Liebherr Cranes

An LR 1300 with super lift equipment and an LR 1160 crawler crane will strengthen the fleet of Viking Cranes. The Tallinn-based company with branch offices

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Maritime Standards Navigation Pod Propulsion Port Authority Ship Electronics Ship Repair Sonar
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: 0.2358 sec (4 req/sec)