The Ultimate Project: Inai Kenanga

Marinelink.com
Thursday, July 18, 2013

Vulkan Couplings supplies the largest MESLU clutches for one of the largest suction dredgers in the world.
 

One of the largest suction dredgers in the world, Inai Kenanga, is to be launched by Inai Kiara SDN BHD, the Malaysian shipping company. Vulkan Couplings has supplied six MESLU clutches for the shift gearboxes of the powerful sand pumps - these couplings are the largest that the company has ever built.


The TSHD Inai Kenanga is designed for a capacity of 32,000 m3. In the standard configuration, two suction pipes at the end of the loading space of the suction dredger reach up to a depth of 35 m. In fact, with extension pipes and additional pumps that are easy to install, the dredger can work up to a depth of 120 m.


The suction dredger is fitted with a double diesel engine that drives the propellers, the generator and the suction pump system. The controllable pitch propellers of the main drive are driven via the two main Siemens/Flender gearboxes directly from the flywheel side of the main engines. The generator for the electrical power supply is also connected via the PTO of the main gearbox with the main machine. The two suction pump systems are installed on the front side of the engines. In order to generate the maximum suction power, a special Siemens/Flender multi-speed gearbox is located upstream from each of the suction pumps. This special drive configuration ensures optimal loading and discharge process. The pumps can be connected in series for discharging the loading on land.


Two MAN 12V48/60B engines with a power rating of 13.250 kW each are used as the main engines.


As the solution provider, and apart from the MESLU clutches, Vulkan Couplings is also supplying all highly flexible couplings for both the main as well as the suction pump drive. RATO S 582Z have been installed in each of the main drive; meanwhile, highly flexible RATO R 473Z provide the necessary torsional vibration damping and compensation of the misalignment in the pump system on front side.


The benefit of this holistic solution for the customer: The complete drive system can be optimally adjusted with respect to torsional vibration as a result of all couplings coming from a single source. This leads to maximum system availability and contributes to minimising the operating costs.


The two Siemens/Flender 3-speed sand pump gearboxes of type GJZ 2250, however, posed a special challenge for the couplings specialist from Herne. For this purpose, Vulkan  Couplings produced a total of six MESLU clutches, each one of size 540 for shifting the first gear, and two smaller MESLU 330 couplings for shifting the second and third gear.


In standard design, the MESLU clutch coupling is a pneumatically operated, dry-running double cone friction clutch with an internal bearing. This is characterised by the fact that the inside and outside parts of the coupling are supported each other so that there is a favourable wear pattern of the friction pads caused by the uniform distribution of forces. By arranging the friction drums as a double cone there is also automatic readjustment that takes place with gradual abrasion and wear of the friction pads. The pads are made of high-performance frictional material based on synthetic resin (without asbestos), very safely dimensioned and extremely wear-resistant so that even in cases of frequent gear shifting operations long service life is guaranteed. The outer friction drums provide a highly reliable shifting operation as a result of their good heat emission capacity. Moreover, the clutch coupling does not cause any axial forces, neither in engaged or disengaged condition.


However, based on the special shaft arrangement (Quill shaft) of the 3-speed pump gearboxes of the Inai Kenanga, it was necessary to modify the standard MESLU design. In this case the hollow shaft of the respective gear had to be connected with the outer part and the solid shaft lying inside with the inner part of the clutch. As a result of the solid and hollow shafts of the gearbox supported on one another, the inner bearing of the standard MESLU design could be omitted. However, the weight of the MESLU clutch in conjunction with the large distance of the centre of gravity to the bearing of the solid shaft on the gearbox side made it necessary to have an additional bearing support in the clutch coupling.


The Vulkan experts developed special pneumatic control units as well as a special monitoring system for the shifting logic of the gearbox with the gear blocking required.


The larger MESLU 540 is the ultimate coupling in this case: It has a nominal torque of 390 kNm at a diameter of 1.80 m and a total weight of 6.5 tons. However, the two "smaller" clutches do not need to be concealed: The MESLU 330 (each with 250 kNm nominal torque) has a diameter of 1.50 m and weighs 3.2 tons.
 

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

People & Company News

First Subsea Achieves API 17L1 Certification for Bend Stiffener Connectors

Connector technology developer First Subsea has received APL 17LI certification for its bend stiffener connectors from the American Petroleum Institute, the company announced today.

Gulf of Mexico Sees First LNG-powered OSV

A special Offshore Supply Vessel (OSV) has been delivered to Shell for its deepwater operations in the Gulf of Mexico.   The vessel, Harvey Energy, is chartered

Bestobell Bags Hat Trick Order in China

Bestobell Marine, part of the President Engineering Group, has received its third order in the past 12 months from Hudong Zhonghua shipyard in China. The deal

Marine Power

Gulf of Mexico Sees First LNG-powered OSV

A special Offshore Supply Vessel (OSV) has been delivered to Shell for its deepwater operations in the Gulf of Mexico.   The vessel, Harvey Energy, is chartered

BIMCO Environmental Performance Guide

BIMCO today launched a new, multi-part guidance resource to support ship owners and operators in improving their environmental performance and the efficiency of their ships.

Coastal Interceptors for Kuwait Coast Guard

Following an extensive evaluation protocol, the Kuwaiti Ministry of the interior has placed an order with Tampa Yacht Manufacturing LLC based in Florida – U.

News

Two Mooring Tugs Delivered to NSW

Nakilat Damen Shipyards Qatar (NDSQ) has delivered two new Qatari-built mooring tugs to towage operator Nakilat SvitzerWijsmuller (NSW).   The delivery of the

Senate Committee Approves Vessel Discharge Reform Legislation

The effort to establish a uniform national framework for the regulation of vessel discharges took another step forward as the Senate Committee on Commerce, Science and Transportation approved S.

Vancouver Port Operations Resume Atfer Container Fire

Port Metro Vancouver said on Thursday that operations had resumed at most port facilities shut down by a shipping container fire the day before, but that its Centerm

Marine Equipment

First Subsea Achieves API 17L1 Certification for Bend Stiffener Connectors

Connector technology developer First Subsea has received APL 17LI certification for its bend stiffener connectors from the American Petroleum Institute, the company announced today.

Maersk Oil Hires Ampelmann Gangway System

After having performed a walk to work (W2W) campaign in the summer of 2014, Motion Compensation Gangways (MCG) developer Ampelmann has again been awarded a contract

Bestobell Bags Hat Trick Order in China

Bestobell Marine, part of the President Engineering Group, has received its third order in the past 12 months from Hudong Zhonghua shipyard in China. The deal

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Maritime Standards Naval Architecture Navigation Offshore Oil Ship Repair Shipbuilding / Vessel Construction 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: 0.2799 sec (4 req/sec)