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

People & Company News

Schlumberger Announces Q1 Results

Schlumberger Limited (NYSE:SLB) today reported first-quarter 2014 revenue from continuing operations of $11.24 billion versus $11.91 billion in the fourth quarter of 2013, and $10.

Russia Ships First Oil From Offshore Arctic Platform

President Vladimir Putin hailed Russia's first shipment of Arctic offshore oil on Friday, saying the platform decried by environmentalists will help Moscow expand its global energy markets share.

Shipping Turns From Banks to Equity Markets for Cash

Shipping companies are turning to equity markets to fill a growing funding gap, betting that investors hungry for decent returns will provide capital to a sector

Marine Power

Coast Guard tactical air squadron holds change of command ceremony

Capt. Kevin P. Gavin relieved Capt. Donna L. Cottrell as commanding officer of Coast Guard Helicopter Interdiction Tactical Squadron Jacksonville during a change of command ceremony at HITRON Friday.

RS at SEA JAPAN 2014

Russian Maritime Register of Shipping (RS) was the only Russian company to take part in SEA JAPAN 2014 exhibition and conference – one of the major exhibitions of the maritime industry.

Havyard to Build Hybrid Battery Arctic PSV

Norway's Havyard says it has signed a contract for the construction of a Havyard 833 WE ICE platform supply vessel with Fafnir Offshore HF. The vessel is to be

News

Saudi SABIC Q1 Profit Falls 1.8 % On Product Prices

Profit at Saudi Basic Industries Corp (SABIC), one of the world's biggest petrochemical firms, slipped 1.8 percent in the first quarter of this year as lower

Korean Ferry Captain's Detention Could Extend As Death Toll Mounts

South Korean prosecutors investigating a ferry disaster said on Sunday they would seek to extend the detention of the ship's captain and two other crew by 10

First Bodies Recoved From Sunken Ferry

South Korean divers retrieved three bodies from inside a sunken ferry overnight, officials said on Sunday, the first time they have been able to gain entry to the passenger section of the ship.

Marine Equipment

Schlumberger Announces Q1 Results

Schlumberger Limited (NYSE:SLB) today reported first-quarter 2014 revenue from continuing operations of $11.24 billion versus $11.91 billion in the fourth quarter of 2013, and $10.

RS at SEA JAPAN 2014

Russian Maritime Register of Shipping (RS) was the only Russian company to take part in SEA JAPAN 2014 exhibition and conference – one of the major exhibitions of the maritime industry.

Van Oord acquires 100% control of Dravo

Van Oord has acquired all shares of its Spanish subsidiary Dravo S.A.  Dravo S.A. has been owned, since 1987, by Van Oord (50%) and the Spanish company Dragados S.

 
 
Maritime Security Maritime Standards Naval Architecture Navigation Offshore Oil Pod Propulsion Port Authority Salvage Ship Simulators 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: 0.2771 sec (4 req/sec)