加拿大进口赛龙滑动轴承

DBS2006.2 Dredge Bearing Systems Product Manual Table of Contents A. Corporate Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 B. Product Grades and Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 C. Dredge Bearing Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 D. NEWSWORKS References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 E. M/v Vesalius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 F. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 G. Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 The information contained in this document has been prepared from the company’s many years of experience in the manufacturing and installing of Thordon Bearings worldwide. This information is offered as part of our service to customers. It is intended for use by persons having technical training and skill, at their discretion and risk. The company reserves the right to change or amend any specification without notice. Corporate Profile Thordon Bearings Inc., a member of the Thomson-Gordon Group of Burlington, Ontario, Canada, designs and manufactures a complete range of high performance, environmentally friendly marine propeller shaft and rudder bearing systems. Recognized internationally for superior performance in marine applications, Thordon bearings are sold in over 70 countries throughout the world. Utilizing Thordon, a unique elastomeric polymer as the bearing wear surface, Thordon bearing systems offer exceptional wear life, a low coefficient of friction and can be easily machined on site. In-house design engineers consult with customers to provide innovative bearing system designs that meet or exceed the customer’s technical requirements. For superior performance in propeller shaft bearing systems, Thordon offers two proven options. The Thor-Lube Stern Tube Bearing System is Thordon’s environmentally-friendly, sealed option to eliminate the pollution risks associated with oil-filled stern tubes. Thordon’s open water lubricated COMPAC stern tube bearing system offers low friction, zero pollution risk and long wear life in blue water operation. Another Thordon first is the factory guaranteed wear life performance of Thordon SXL self-lubricating pintle and stock rudder bearings. Thordon SXL rudder bearings are guaranteed to last for 15 years in newbuild applications or Thordon will replace the bearing. Thordon Composite bearings designed for high performance in dredge, workboat and ferry applications, consistently deliver a wear life of more than twice that of other non-metallic bearings resulting in significantly reduced life cycle costs. A dedicated team of Research and Development Engineers continually develop and test new generation polymers and bearing designs to further improve the performance of the bearing systems being supplied. New products currently being released include Thor-Coat, an elastomeric shaft coating to prevent shaftline corrosion and Thorseal, a long life rudder stock seal. Since the turn of the century Thordon Bearings’ parent company, the Thomson-Gordon Group, has recognized the importance of superior products, precision manufacturing and application engineering support. Thordon Bearings’ engineering and quality focus has earned worldwide recognition. Quality procedures are certified to the ISO 9001:2000 Quality System - the most rigorous system in the world. Thordon bearing systems are proven, cost effective, environmentally positive solutions for both marine and industrial applications. Thordon bearings are available worldwide from distributors whose factory trained specialists work with customers from establishing specifications to ensuring correct field installation. 1 Product Grades and Configurations Thordon Bearings, a pioneer in the development of grease and oil free elastomeric polymer bearing systems, offers a choice of environmentally friendly journal bearing solutions for dredge cutterhead shaft, propeller shaft, rudder, pump and deck equipment solutions. Thordon is a proprietary, elastomeric synthetic polymer alloy originally developed by Thordon Bearings over 30 years ago as a journal bearing for vertical pump applications. Thordon's unique flexible polymer structure can extend at least twice of its original dimensions and can recover its dimension after deformation offering the best combination of flexibility and strength. Thordon is tough, self-lubricating, has a much lower coefficient of friction and is able to accommodate much higher specific pressures than rubber. Continuous research over the years has resulted in the development of five different bearing grade elastomer products - XL, SXL, COMPAC, HPSXL and Composite. This allows selection of an optimum solution based on matching product characteristics to the specific application requirements. ThorPlas is a new, proprietary engineered thermoplastic bearing product recently introduced by Thordon Bearings. While the Thordon range of high performance elastomer products clearly offer superior performance in the applications which they can be specified, there are technical limits, such as maximum pressures which they cannot be used. To address this issue, Thordon Bearings has introduced ThorPlas®, which significantly expands the range of applications where Thordon Bearings can be specified, while still maintaining many of the recognized Thordon performance advantages. 2 3 Product Grades and Configurations ...cont’d. Thordon Composite Thordon Composite is a two component bearing formulated specifically for use in very abrasive environments such as water lubricated cutterhead shafts or open water propeller shaft bearings. The actual bearing surface is a black material and is referred to as GM2401. This softer material is fused to a yellow, stiff, high strength polymer sleeve. GM24021 is homogeneous - there are no layers of differing materials and properties are consistent through the wall thickness. Composite bearings are available in a full range of sizes in both tube and stave configurations. Thordon SXL Thordon SXL offers a low coefficient of friction for reduced break away torque and smoother operation at lower shaft RPM in water lubricated applications. SXL offers: • Higher resistance to abrasion than XL in wet applications; good abrasion resistance operating dry • Lower coefficient of friction (typically 0.08-0.15) than XL • Dry start-up capability as a vertical pump bearing • High resistance to shock loading and vibration Product Grades and Configurations ...cont’d. Thordon COMPAC Thordon COMPAC is a high performance grade of Thordon that is used in open water lubricated propeller shaft bearing systems. Specially formulated with a low coefficient of friction to reduce startup friction and eliminate stick- slip, COMPAC's unique configuration is designed to promote early formation of a hydrodynamic film at lower shaft rpm. The COMPAC bearing system is Class-approved for 2:1 L/D ratios. COMPAC's design properties are effectively similar to SXL. Thordon XL Thordon XL is a general purpose bearing offering superior performance compared to other bearings commonly used in water lubricated propeller shaft and other marine applications. XL offers: • Low co-efficient of friction (typically 0.13-0.20) • High resistance to abrasion in dry applications • High resistance to shock loading and vibration Thordon HPSXL TRAXL Thordon HPSXL is designed for higher pressure water lubricated applications where the HPSXL bearing is bonded into a bronze shell. HPSXL TRAXL offers: • A maximum dynamic working pressure to 55.0 MPa (8000 psi) in limited motion • Lowest coefficient of friction (typically 0.06-0.12) • Moderately abrasion resistant (lower abrasion resistance than XL or SXL) • High resistance to shock loading and vibration ThorPlas® ThorPlas® is a non elastomeric material developed by Thordon specifically as a homogeneous high pressure bearing. ThorPlas® offers: • A maximum dynamic working pressure to 31.0 MPa (4500 psi) • Low coefficient of friction (typically 0.10-0.17) • Very low wear in non-abrasive environments • Reasonable abrasion resistance - less than Thordon elastomer grades, but better than bronze, epoxy phenolics and many other non-metallic bearing materials 7 8 Dredge Bearing Applications Composite Water Lubricated Cutterhead Shaft Bearings Thordon Composite bearings were introduced in 1974 after laboratory tests on a highly abrasion resistant compound known as GM2401 (black wear surface) showed wear resistance to be better than rubber in dirty water conditions. Thordon's first large cutter head shaft bearings were installed in August 1978 on the Zanen Verstoop Dredge, Gouda, operating in the Middle East. The Thordon Composite bearing outperformed the previous cutless rubber bearing by a factor of approximately 2 times. Due to their tough, elastomeric properties, Thordon Composite bearings resist wear by tending to deflect, and then reject, abrasive particles allowing them to be flushed through the bearing without tearing away bearing material. Less wear translates into less downtime and fewer bearing replacements over the operating life of the vessel. The design pressure for cutterhead shaft bearings is between 0.4 MPa (58 psi) and 0.6 MPa (87 psi). The maximum design pressure for full rotation is 1.4MPa (203 psi). Typically, the L/D ratio is 3:1. The mating surface (shaft liner) should be corrosion resistant and as hard as possible: mimimum 40 HRC; typically 60 HRC or greater such as Ni-Cr-B. The required water flow for flushing and cooling the bearings is 0.15 L/min/mm (1 U.S.Gal./min./inch) of shaft diameter. Thordon Composite in combination with a hard shaft liner offers the best combination for long bearing wear life in abrasive environments. However, a good quality water flush also prevents the bearing from being clogged from the sand and rock particles from the cutterhead operation. Reducing the level of abrasive particles in the water flush to the bearings will translate into a longer wear life of the bearing. Composite cutterhead shaft bearing removed from dry ice and ready to be installed in housing Composite cutterhead shaft bearing being installed on CSD J.F.J. de Nul Dredge Bearing Applications ...cont’d. Composite Water Lubricated Cutterhead Shaft Bearings Composite Water Lubricated Cutterhead Intermediate Lineshaft Bearings Thordon Compsite has consistently outperformed rubber in dredge cutter head shaft bear- ing applications for many years. Now, Thordon has built on this success and developed a water lubricated intermediate lineshaft bearing utilizing Thordon Composite. The risks for pollution from grease leaking out, or damage to the bearing from water leaking in, that conventional bearings face are totally eliminated with this new Thordon design. Thordon cutterhead intermediate lineshaft bearings offer the following benefits to the owner: • Uses seawater for lubrication - Eliminates grease and greasing system - No pollution - No clean-up after dredging - Improved safety for crew (no slippery ladder) • Lower maintenance costs - Able to change bearing with shaft in place - Ship's crew can change bearing - no grease purchases • High abrasion resistance • Less friction; no noise or vibration • Accomodates edge loading caused by shaft misalignment • Greater impact resistance/resiliance 4 Composite cutterhead staves being installed for CSD Abu Al Abyadh Composite cutterhead staves installed on CSD Abu Al Abyadh Dredge Bearing Applications ...cont’d. Other Applications for Thordon on a Cutterhead Dredge Propeller shaft bearings: Composite, SXL, XL, COMPAC Rudder bearings: SXL Ladder drive bearings: SXL Ladder trunion bearings: HPSXL TRAXL, ThorPlas® Ladder wire rope sheave bearings: SXL Pipe support swivels: HPSXL TRAXL, ThorPlas® Spud housing bushes: SXL Pump Bearings: Composite, SXL, XL, HPSXL TRAXL, ThorPlas® 5 New Composite cutterhead intermediate lineshaft bearing installed Cutter ladder installation in CSD D’Artagnan New Composite cutterhead intermediate lineshaft bearing Cutterhead shaft line showing 2 of 3 Composite intermediate bearings 11 Thordon Composite cutterhead shaft bearings have been recently installed or ordered on six cutter suction dredgers in Europe, China and the Middle East. Thordon Composite is a tough two- component elastomeric polymer alloy bearing specifically formulated to provide superior wear life in very abrasive water conditions. Thordon Composite bearings operating in combination with a hard stainless steel shaft or hard coated shaft liner such as Ni-Cr-B, routinely outwear rubber bearings by a factor of two or more, significantly reducing maintenance downtime and costs over the operating life of the dredge. "Archirodon Dredging Construction (Overseas) Co. S.A, of United Arab Emirates has been using Thordon Composite dredge bearings since 1999 and they have performed better than we expected", says Panos Zoglopitis, Mechanical Engineer for Archirodon Dredging Division. "These bearings last longer than rubber bearings. We have installed Thordon Composite on CSD Pontos and CSD Aetos and plan to continue using Thordon Composite bearings and staves." Other Cutter Suction Dredgers to be equipped or having had Thordon installed recently, include Zeeland II owned by Van Oord Ship Management B.V., Netherlands, Huta Sete 07 owned by Huta-Sete Marine Works Ltd., Saudi Arabia, Jin Hang Jun 215 owned by Tianjin Waterway Bureau, China and CSD 8060 owned by Jan de Nul of Belgium. National Marine Dredging Company of U.A.E has also been using Thordon Composite dredge bearings since 1996 with installations on five of their dredgers. The recently built jumbo dredger, D'Artagnan, owned by S.D.I. S.A. (Société De Dragage International), France, also has water lubricated Thordon Composite intermediate lineshaft bearings installed in addition to the Composite cuttherhead shaft bearings. NW Thordon Composite Cutterhead Shaft Bearing Thordon Composite Intermediate Lineshaft Bearing For CSD D’Artagnan COMPOSITE BECOMING THE BEARING OF CHOICE FOR CUTTERHEAD DREDGES Recently Built Jumbo Dredger, D’Artagnan, Owned By Société De Dragage International Of France Equipped With Thordon Composite Cutterhead Shaft Bearings And Intermediate Lineshaft Bearings 12 When Caesar conquered Egypt in 48 B.C., he used dredgers to clear the way for his ships into the Alexandra Harbour. No one knows for sure what these dredgers looked like or how they worked. We can speculate, however, that if the Roman engineers who built them could see into the future, they would be astonished by the size and power of the J.F.J. de Nul. Constructed at IHC shipyard in the Netherlands for Jan de Nul of Belgium, the J.F.J. de Nul is the most advanced self-propelled cutter suction dredger ever built. Her 6,000kW cutter drive, 30% more powerful than cutters currently in use, is capable of dredging from a depth of 6.5 m to 35 m (21 ft. to 115 ft.). According to IHC, the vessel incorporates the latest advances into dredging systems, engineering, and materials technology. These advances included specifying Thordon Composite as the bearing material for the 950 mm (37.4”) diameter cutterhead drive shaft. “Thordon was selected for a number of reasons,” says Marc Butzelaar, Sales Manager for Sandfirden Technics BV, a Netherlands-based company that, in addition to being a Thordon Distributor, specializes in engineered products for industrial and marine applications. “Dredging systems are exposed to extreme underwater forces and unpredictable torque peaks. The J.F.J. de Nul needed a cutterhead bearing that not only performs well, but also has a long wear life in dirty, sandy water.” Introduced in 1977, Thordon Composite was first installed as a cutterhead bearing on the dredger, Gouda. Since that time the product has been installed in dozens of dredger applications worldwide. Thordon Composite p e r f o r m s reliably in highly loaded and abrasive laden water conditions - its wear life is typically twice that of rubber or more. “Dredge vessels often work in remote locations, dredging new ports and waterways,” says Butzelaar. “They can often be hundreds of miles away from an airport or commercial port where a bearing can be replaced. That’s why reliability and long wear life is so crucial.” Portability is also an issue. Because dredgers can work in isolated areas around the globe, they must stow most of the materials they need for maintenance and repair onboard. At 958 mm (38”) ID x 1084 mm (42.7”) OD x 3475 mm (136.8”) long, the required size of the cutter bearing for the J.F.J. de Nul was huge. So, to accommodate the need for both ease-of- maintenance and portability, the Thordon Composite bearing was engineered into five, 695 mm (27”) long bearing tube segments. Each was shipped to the construction location, placed in dry ice, then inserted one by one into the 1080 mm (42.4”)- cutterhead housing. “At installation, there was a 3 mm to 4 mm (0.1181” to 0.1574”) gap left between the frozen bearing segments so that as the bearings reached ambient temperature, they would have room to expand and fit in place,” says Butzelaar. Although the overall size of the cutter bearing is the largest ever for a dredger, each individual segment weighs a manageable 258 kg (570 lbs.). The smaller bearing tubes are easier to transport and, if necessary, easy to stow aboard the J.F.J. de Nul. Advanced materials like Thordon Composite are enabling dredge vessels to operate more productively with less down time. Sea trails for J.F.J. de Nul are planned to be completed by the end of November and handed over to Jan de Nul in the spring of 2004. NW COMPOSITE A KEY COMPONENT OF THE M O S T A D V A N C E D D R E D G E R I N W O R L D Thordon Composite bearing freeze-fit installation on J.F.J. de Nul cutterhead drive shaft 13 THORDON COMPOSITE INSTALLED IN CUTTERHEAD DREDGES National Marine Dredging Company (NMDC) of Abu Dhabi specified Thordon Composite in their specialized 20,200kW cutter suction dredger built at IHC of Sliedrecht, Holland. Composite staves were installed in May 1999 with the assistance of Dutch Thordon Distributor, B&B Engineering. The staves for the Al Sadr were for a 890mm (31 in.) diameter shaft. Al Sadr has the capabiltiy to dredge to a depth of 27m (88 ft.), and will keep the important shipping lanes of the Abu Dhabi port open as well as create new ones as the port continues to grow. Manson Construction Company of Seattle, USA, launched their cutter- head dredger, H.R. Morris in the fall of 1998 to dredge the Snohomish River in Washington. Constructed by Gunderson Marine and outfitted by Manson, H.R. Morris is equipped with Thordon Composite bearings in the 559mm (20 in.) diameter shaft cutter head. Thordon’s Washington distributor, Pacific Marine Equipment, also supplied Thordon SXL TRAXL trunnion bearings for H.R. Morris for their self-lubricating and shock absorbing characteristics. The specialized cutter suction dredger, Al Sadr was equipped with Thordon Composite staves in the 890mm (31 in.) diameter shaft cutterhead. Al Sadr installation of 48 Thordon Composite staves during construction at IHC Holland in Sliedrecht. NW 12 M/v Vesalius based in Mahe Island, Seychelles - August 2001 M/v Vesalius Date of Installation: August 2001 Vessel Name: M/v Vesalius Vessel Type: Cutterhead Dredger Owner: M/S Jan De Nul Group of Belgi