Sixth VLCC Delivered By Kockums To Salen Features Roller Bearing Design For Shaft
Kockums Shipyard, Malmo, Sweden, has just announced delivery of the 256,050-dwt tanker Sea Swift to the iSalen Shipping Companies of Sweden.
The turbine-powered VLCC is the last of six tankers ordered by Salen and the 16th in the Kockums present series of twenty 255,000- tonners.
Built under special survey of Lloyd's Register of Shipping, the Sea Swift is a highly automated ship, with complete electronic control and monitor systems to enable periods of unmanned engine room operation at sea. The ship is equipped with a sophisticated dataprocessing system, including autopilot, bridge control system and fouling calculator, which regulates navigation and the supply of steam to the main turbines.
The innovations on board the Sea Swift feature the introduction of a new roller bearing design for the propeller shaft, which was developed by Kockums in cooperation with Svenska Kullagerfabriken and the Salen Shipping Companies.
The new self-adjusting roller bearing- construction is designed to stand the pressure of the heavy supertanker propeller. It is composed of a spherical roller bearing with an external diameter of 50.4 inches, weighing 1.5 tons, and of a shaft 34.0 inches in diameter.
Propeller shaft, bearings and seals have been designed in such a manner that their inspection and seal replacement can be accomplished without drydocking.
This new design permits propeller and shaft to be installed in one unit from outside of the ship through the stern eye. Bearings are then fitted after the shaft is in position.
During the ship's sea trials in the North Sea, observations of cavitation and measurement of propeller-induced impulses on the hull were recorded for the Swedish Institute for Technical Development. Measurements of wake distribution on the propulsion system will 'be continued in the forthcoming Kockums 255,000-dwt ship ordered by A/S Athene of Norway.
Kockums specialists seek to determine more precise measurement for wake impact on propeller design, so as to weigh cavitation and vibration properties of the propeller. Estimates are that the new bearing design will prove superior and less sensitive to seawater penetration.
The observations of cavitation for the Swedish Institute were made with both still and TV cameras, equipped with special lighting placed on both sides of the hull, just in front of the propeller. TV images were monitored during the trials and simultaneously recorded on video-tape for shoreside analysis.
Pressure impulses were measured at six points on the hull above the propeller with pressure transducers. Variations in pressure were then recorded on a 14-channel tape for later digital conversion and evaluation on land.
The results of these tests will 'be compared with corresponding data obtained from model experiments, so as to facilitate more accurate approximation of model experiment reliability.
Other vital Sea Swift data are as follows: gross registered tonnage, 125,389; overall length, 1,117.1 feet; length between perimeters, 1,080.0 feet; molded breadth, 170.0 feet; depth to main deck, 84.0 feet; draft, 65.9 feet, and pump capacity, 70,445.9 gallons per minute.
Propelling machinery used in the ship is of the Kockums/Stal-Laval type steam turbine, 32,000 shp at 85 rpm with speed of 15.9 knots.
Read Sixth VLCC Delivered By Kockums To Salen Features Roller Bearing Design For Shaft in Pdf, Flash or Html5 edition of February 1974 Maritime Reporter
Other stories from February 1974 issue
Content
- Shipyard Marketing Conference Planned page: 4
- Cordon International To Supply Equipment For Three LNG Ships page: 6
- Sixth VLCC Delivered By Kockums To Salen Features Roller Bearing Design For Shaft page: 7
- Admiral Payne To Succeed Admiral Brockett At Webb page: 7
- NASSCO Launches Largest Vessel Ever Built On West Coast page: 7
- Walter Thorsen, Inc. Named Exclusive Rep For Eleusis Shipyards page: 8
- Ogden Marine, Inc. Buys Two Tankers page: 10
- Oceans International Announces Merger And Expansion Plans page: 10
- Aluminum Tanks And LNG Ship Steel Hulls To Be Joined By Using Du Pont Detacouple Explosion Bonded Welding Transition Joints page: 11
- McAllister Orders Three 4,290-Hp Tugs page: 11
- Delta SS Awards Contract To Equitable For 50 LASH Barges page: 12
- Bethlehem Begins Construction On 265,000-Dwt Tanker —Largest Vessel Built In The United States page: 12
- Arthur Levy Boat Service Announces New Appointments For Thomas And LeBlanc page: 12
- Greek Committee Established By Det norske Veritas page: 13
- Esso Norway Test Of Hull Structure Proves Design And Good Workmanship page: 14
- Todd President Sees U.S. Shipbuilders Improving Competitive Position page: 14
- Society Of Marine Port Engineers N.Y. Discuss Care Of Turbine And Hydraulic Oil Systems page: 14
- Harwich Tonnage, Inc. Formed In California page: 15
- K.W. Waldorf Named To New Zapata Post page: 15
- Bigger, Bigger . . . Bigger page: 18
- USMMA At Kings Point To Admit Women page: 19
- Storm Awards Contract To Bethlehem Beaumont Shipyard For Offshore Drilling Rig page: 20
- NASSCO Expanding Facilities To Build 150,000-Ton Tankers page: 20
- NASSCO Delivers S/S Coronado— First Of Three For Margate Shipping page: 21
- SNAME N.Y. Metropolitan Section Hears Technical Paper On 'New Approach To The Ship Hull Characteristics Problem' page: 21
- ASNE Annual Meeting Set For May 2-3 In Washington, D.C. page: 21
- Experimental LNG Carrier Will Evaluate Two Tank Systems Under Operating Conditions page: 24
- International Ship Suppliers To Meet In Washington, D.C. September 22-26 page: 24
- Thomas B. Crowley Elected President At Western Shipbuilding Ass'n Annual Meeting page: 24
- Whitehouse To Head ABStech Regional Office In Houston page: 25
- Colt Industries Names Nidenberg page: 25
- FMD Appoints Sanchez To Direct Field Operations page: 25
- Alco Engines Names Comeng Holdings Ltd. Australian Licensee page: 25
- Magnavox Announces New Integrated Navigation System page: 28
- Friede & Goldman Inc. Design Zapata Rigs Building At Avondale page: 28
- Sea Trials And Launching Ceremonies Held For AMOCO Tankers At Astilleros Espanoles page: 28
- Halter Delivers New York Pilot Boat page: 29
- Ametco Shipping Elects J.E. Hundt President page: 29
- World Dredging Ass'n New Midwest Chapter To Meet February 28 page: 29
- Wiley And Clyde Iron Now Division Of AMCA Int'l —AMCA Sales $100 Million page: 30
- Kaiser To Build LNG Tanks For Oceangoing Ships On Pinto Island In Mobile Bay page: 30
- Eleusis Shipyards Launches Largest Vessel Built In Greece page: 31
- Paclines To Carry Cargo California To Hawaii Using Tug And Superbarge page: 31
- L. Arthur Strenkert Named Sales Manager Smit Nymegen Corp. page: 31
- Magnavox Announces Offshore Drill Rig Positioning System page: 31
- Paul J. Evanson Appointed Controller Moore And McCormack page: 32
- Paper On Water jet Propulsion Discussed During SNAME Philadelphia Section Meeting page: 32
- Mainland China Places Order Worth $2 Million For Rucker Petroleum Drilling Equipment page: 33
- Pittsburgh-Des Moines Orders Large Quantity Of Aluminum For LNG Ship And Land Use page: 33
- Worthington Service Corp. Names Budrick And lennings page: 33
- Zapata Corporation Reports Record Results page: 33
- Drew Chemical Names Rogers Managing Director New So. Africa Subsidiary page: 33
- Luckenbach To Build New Tampa Terminal page: 33
- SNAME Players Perform At Pacific Northwest Section's 27th Annual Fall Meeting page: 33
- Japanese Firm Buys Lawson Products Corp. —John Gaydos Named page: 34
- David O'Neil To Head New Firm Of Marine Propulsion Consultants page: 34
- Liberian Services —Consulting Firm Elects Wiswall Pres. page: 35
- Diamond M Orders Two Jackup Rigs And A Semisubmersible page: 35
- New Marine Systems Brochure From Waukesha Motor page: 36
- Management Changes At Dearborn-Storm page: 36
- Tanker Management Firm Promotes Nichols page: 36
- DOD Management Of Energy Resources Highlights Naval Engineers Meeting page: 37
- Raytheon Company Submarine Signal Div. Appoints R.G. Popovici page: 38
- Berwind Lines Names Bericochea Exec. VP page: 38
- Selective Calling System Saves Time For Oceangoing Tankers And River Vessels page: 40
- Storehouse Of Information Readily Available From ABS Using Computerized Retrieval page: 42