WO2013186527A1 - Palier lisse - Google Patents

Palier lisse Download PDF

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Publication number
WO2013186527A1
WO2013186527A1 PCT/GB2013/051404 GB2013051404W WO2013186527A1 WO 2013186527 A1 WO2013186527 A1 WO 2013186527A1 GB 2013051404 W GB2013051404 W GB 2013051404W WO 2013186527 A1 WO2013186527 A1 WO 2013186527A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
tubular element
tubular
tubular elements
outer face
Prior art date
Application number
PCT/GB2013/051404
Other languages
English (en)
Inventor
Alec BARRON
Original Assignee
Wärtsilä Uk Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wärtsilä Uk Limited filed Critical Wärtsilä Uk Limited
Publication of WO2013186527A1 publication Critical patent/WO2013186527A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
    • F16C33/205—Multilayer structures, e.g. sleeves comprising a plastic lining with two layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/14—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load specially adapted for operating in water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/201—Composition of the plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
    • F16C33/206—Multilayer structures, e.g. sleeves comprising a plastic lining with three layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/50—Lubricating properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/30—Ships, e.g. propelling shafts and bearings therefor

Definitions

  • the present invention relates to a plain bearing for a rotary shaft, and in particular but not exclusively to a marine bearing, for example a propeller shaft bearing, a stern tube bearing, a steering gear bearing, a stabiliser bearing, a pintle bearing, a stern roller bearing or a rudder bearing.
  • the invention also relates to a kit of parts for manufacturing a plain bearing, and a method of manufacturing a plain bearing.
  • rotary shaft as used herein includes shafts that rotate continuously, for example propeller shafts, and also shafts that rotate in a reciprocating manner, for example rudder shafts.
  • a plain bearing for a rotary shaft is to support the shaft and allow it to rotate relative to a fixed housing such as a stern tube.
  • the bearing must therefore be made of a material that has high strength and resistance to wear, and which also has a low coefficient of friction with the rotary shaft.
  • the bearing material In the case of marine bearings, the bearing material must also be resistant to contact with water (fresh or seawater, depending on the type of bearing) and/or with oil if it is an oil lubricated bearing.
  • marine bearings are made of a bearing material comprising a thermosetting resin or a composite that includes a thermosetting resin and a fibrous reinforcing material such as vegetable cellulose fibres, cellulose viscose fibres, polyester, polyamide, polyacrylonitrile, aramid, polybenzoxyzole, PTFE, glass, ceramic and carbon fibres, or a blend of two or more of those fibres.
  • a bearing material comprising a thermosetting resin or a composite that includes a thermosetting resin and a fibrous reinforcing material such as vegetable cellulose fibres, cellulose viscose fibres, polyester, polyamide, polyacrylonitrile, aramid, polybenzoxyzole, PTFE, glass, ceramic and carbon fibres, or a blend of two or more of those fibres.
  • Plain bearings are generally tubular and have a substantially cylindrical bore for receiving the rotary shaft and a substantially cylindrical outer surface that fits into a cylindrical housing.
  • the diameter of the bore is matched to the diameter of the shaft, which in the case of a propeller shaft may range for example from 150mm to 1500mm or more.
  • the diameter of the impeller shaft may typically be 50mm or more.
  • the outer diameter of the bearing is dictated by the diameter of the housing.
  • the wall thickness of the bearing is generally related to the diameter of the shaft and typically ranges from about 2% of the shaft diameter to 5% or more. This very wide range of possible bearing sizes causes problems for manufacturers and suppliers, who have to hold a large stock of bearings to meet demands as they arise.
  • bearings are moulded in a number of common sizes and then machined internally and externally to provide the required internal and external diameters.
  • Features such as oilways may also be machined into the bearing if required.
  • any material removed during machining is wasted. It is therefore desirable that the dimensions of the unmachined bearing should be as close as possible to the required final dimensions.
  • a plain bearing for a rotary shaft comprising a plurality of coaxial tubular elements that are made of substantially non-metallic materials and are mounted one within another, said tubular elements including a first tubular element having an outer face and a second tubular element having an inner face that engages the outer face of the first tubular element, said outer and inner faces being of substantially matched frusto-conical shape.
  • a bearing according to the present invention therefore comprises two or more tubular elements that are mounted one within another to provide the required internal and external diameters.
  • Such a bearing can be constructed by assembling and joining together an appropriate number of tubular elements of different sizes. These tubular elements can be made to standard sizes, thus simplifying the manufacturing process. By assembling an appropriate selection of tubular elements, all common bearing sizes can be provided. This reduces the need to carry high levels of stock and allows the supplier's business to operate more efficiently.
  • first and second tubular elements are of substantially matched frusto-conical shape, they can be assembled easily and pressed together axially to provide a strong, tight-fitting joint between the faces.
  • the tubular elements can be bonded together using a suitable adhesive.
  • the provision of matched frusto-conical faces helps to ensure that a layer of adhesive between the faces is evenly distributed: that is, it reduces the risk of the adhesive layer being scrapped off as one tubular element is inserted into the other (which could happen if the faces of the tubular elements were cylindrical).
  • the tubular elements are made of substantially non-metallic materials such as, for example, a thermosetting resin or a thermoplastic material or a composite that includes a thermosetting resin or a thermoplastic material.
  • the bearing material may however include a small quantity of certain metallic materials, for example as a friction modifying substance or a reinforcing material.
  • the bearing may include a third tubular element having an inner face, wherein the second tubular element has an outer face that engages the inner face of the third tubular element, the outer face of the second tubular element and the inner face of the third tubular element being of matched substantially frusto-conical shape.
  • the wall thickness of the bearing can be increased. Additional tubular elements may also be provided, if required.
  • the bearing preferably includes an adhesive layer between the faces of adjacent tubular elements that bonds the tubular elements together, so that the assembled bearing forms a unified whole.
  • Any suitable adhesive may be used, for example an epoxy resin.
  • the first tubular element preferably comprises a bearing element having a substantially cylindrical bore for receiving the rotary shaft.
  • the cylindrical bore may be formed by moulding but more usually will be formed by machining, for example by boring or reaming.
  • the cylindrical bore has a diameter x in the range 50mm to 1500mm, preferably 70mm to 1200mm.
  • the bearing element is made of a bearing material comprising a thermosetting resin or a thermoplastic material or a composite that includes a thermosetting resin or a thermoplastic material.
  • the bearing material may include a reinforcing material comprising a fibrous material selected from a group including vegetable cellulose fibres from the seed and bast, cellulose viscose fibres, polyester, polyamide, polyacrylonitrile, aramid, polybenzoxyzole, PTFE, glass, ceramic and carbon fibres, or a blend of two or more of those fibres.
  • the bearing material may include a lubricant material comprising a solid lubricant, a liquid lubricant or a blend of lubricants.
  • the outer-most tubular element has a substantially cylindrical outer face for mounting within a cylindrical housing.
  • the bearing preferably comprises between two and five tubular elements.
  • the substantially frusto-conical outer and inner faces have a taper angle of at least 0.1°, said taper angle being preferably in the range 0.15° to 2° and more preferably in the range 0.2° to 1°.
  • the bearing is preferably a marine bearing, preferably comprising a propeller shaft bearing, a stern tube bearing, a steering gear bearing, a stabiliser bearing, a pintle bearing, a stern roller bearing or a rudder bearing.
  • kit of parts for manufacturing a plain bearing comprising a plurality of tubular elements that are made of substantially non-metallic materials and are configured to be mounted one within another, said tubular elements including a first tubular element having an outer face and a second tubular element having an inner face for engagement with the outer face of the first tubular element, said outer and inner faces being of substantially matched frusto-conical shape.
  • a method of manufacturing a plain bearing comprising providing a plurality of tubular elements that are made of substantially non- metallic materials and mounting said tubular elements one within another, said tubular elements including a first tubular element having an outer face and a second tubular element having an inner face that engages with the outer face of the first tubular element, said outer and inner faces being of substantially matched frusto-conical shape.
  • the method preferably includes bonding the tubular elements to one another by providing an adhesive layer between the engaged faces.
  • the method preferably includes forming a substantially cylindrical bore in said first tubular element.
  • the method preferably includes forming a substantially cylindrical outer face on an outer tubular element, for mounting the bearing within a cylindrical housing.
  • Figure 1 is an end view of a propeller shaft bearing
  • Figure 2 is a side section of the bearing, taken on line II- II of Fig.1, and
  • Figure 3 is a cross section of the bearing, taken on line III- III of Fig. 2.
  • the propeller shaft bearing 2 shown in the drawings comprises a substantially cylindrical sleeve that, in use, is fitted inside the stern tube (not shown) of a ship.
  • the bearing 2 may be a single or multiple sleeve component.
  • the bearing 2 is divided into three separate sleeve components 2a, 2b, 2c that abut one another end to end.
  • the outside diameter of the first component 2a is slightly larger than that of the second component 2b, which is slightly larger than that of the third component 2c. This is to simplify the process of inserting the bearing 2 into the stern tube, with which it has a heavy interference fit.
  • a substantially cylindrical bore extends through the bearing 2, the surface of the bore providing a bearing surface 8 for a propeller shaft (not shown) that extends through it.
  • Two arcuate oilways 10 are provided as cut-outs on either side of the bearing surface 8, to allow the flow of a liquid lubricant through the bearing.
  • the oilways 10 are generally located diametrically opposite one another, as shown in the drawing. In a twin screw ship, the oilways are generally positioned higher, at an angle of about 30° above the horizontal diameter of the sleeve.
  • the lubricant may be oil based, water based or glycol based.
  • a keyway 12 is provided in the external surface of the bearing: this engages a key in the stern tube to aid alignment during installation and to prevent rotation of the bearing.
  • the inner diameter x of the propeller shaft bearing 2 is matched to the diameter of the propeller shaft, which may typically range from 150mm to more than 1500mm. For vessels driven by waterjets the shaft diameter may be smaller, for example 50mm or more.
  • the length L of the bearing 2 is normally between 1 and 3 times the shaft diameter, more typically between 1.5 and 2.5 times the shaft diameter.
  • the bearing 2 consists of a plurality of coaxial tubular elements that are mounted one within another.
  • each section 2a, 2b, 2c of the bearing 2 consists of two coaxial tubular elements comprising an inner element 14 and an outer element 16 that surrounds the inner element 14.
  • the inner tubular element 14 comprises a bearing element having a substantially cylindrical bore that provides the bearing surface 8 for the rotary shaft.
  • the outer tubular element 16 has a substantially cylindrical outer face 16' for mounting within a cylindrical housing, for example a stern tube.
  • the inner tubular element 14 has an outer face 14' and an inner face 14
  • the outer tubular element 16 has an outer face 16' and an inner face 16".
  • the inner face 16" of the outer element 16 engages the outer face 14' of the inner element 14, the outer and inner faces 14', 16" being of substantially matched frusto-conical shape.
  • a layer 20 of an adhesive is provided between the faces of the adjacent tubular elements 14, 16 to bond the tubular elements permanently together, so that the assembled bearing 2 forms a unified whole. Any suitable adhesive may be used, for example an epoxy resin.
  • the substantially frusto-conical outer and inner faces 14', 16" have a taper angle of at least 0.1°.
  • the taper angle is preferably in the range 0.15° to 2° and more preferably in the range 0.2° to 1°.
  • the bearing 2 may include one or more intermediate coaxial tubular elements (not shown) that are located between the inner element 14 and the outer element 16.
  • a three element bearing will include a first (inner) tubular element having an outer face, a second (intermediate) tubular element having an inner face that engages the outer face of the first tubular element, and a third (outer) tubular element having an inner face, wherein the second tubular element has an outer face that engages the inner face of the third tubular element, the engaged faces of the tubular elements being of matched substantially frusto-conical shapes.
  • the bearing comprises between two and five tubular elements.
  • the tubular elements 14, 16 are made of substantially non-metallic materials.
  • the elements may for example be made of a thermosetting resin or a thermoplastic material or a composite that includes a thermosetting resin or a thermoplastic material.
  • the bearing material may include a reinforcing material comprising a fibrous material selected from a group including vegetable cellulose fibres from the seed and bast, cellulose viscose fibres, polyester, polyamide, polyacrylonitrile, aramid, polybenzoxyzole, PTFE, glass, ceramic and carbon fibres, or a blend of two or more of those fibres.
  • the bearing material may also include a lubricant material comprising a solid lubricant, a liquid lubricant or a blend of lubricants.
  • the inner and outer tubular elements 14, 16 may be made of similar materials or alternatively they may be made of different materials.
  • the inner element 14 may be made of a non-metallic bearing material having low friction characteristics
  • the outer element 16 may be made of a non-metallic material that has a lower swelling characteristic in water than the bearing material for improved dimensional stability. This allows the running clearance between the shaft and the bearing to be reduced. Suitable materials for the inner and outer layers are described in EP 1448903B, the content of which is incorporated by reference herein.
  • the tubular elements 14, 16 are made of a material that includes a thermosetting resin or a thermoplastic material, and a reinforcing material that is encapsulated inside the resin or thermoplastic material.
  • the fibrous material may consist of a blend of para- or meta-aramid comprising approximately 65% by weight, cellulose fibre (viscose) at approximately 18%, and polyacrylonitrile (PAN) fibre at approximately 17%.
  • the fibrous material may also include a small quantity (i.e. less than 7%) of glass fibre. Although glass has an abrasive effect, we have found that the inclusion of a small quantity can be beneficial as it serves to polish the surface of the propeller shaft.
  • the fibrous material may be supplied in the form of a resin-impregnated yarn, which is wound around a mould to form the sleeve, with the result that the fibres extend circumferentially around the sleeve.
  • the yarn may be wound helically, so that the fibres extend both circumferentially and longitudinally.
  • the fibrous material may be provided in the form of a woven fabric, in which case the fibres will extend both circumferentially and longitudinally, or a non-woven sheet such as a needle felt, in which case fibres will extend circumferentially, radially and longitudinally.
  • the reinforcing material may comprise from 15% to 60%, and preferably from 30% to 60% by weight of the inner element.
  • thermosetting resin this may be a phenolic based resin, for example the polycondensation of cresylic acid with formaldehyde.
  • a polyester based resin or an epoxy based resin may be used.
  • the resin generally comprises from 25% to 60%, and preferably from 30% to 50% by weight of the inner element.
  • thermoplastic material this may for example, but not exclusively, be a polyamide, polyester, polyacrylonitrile or polyolefin.
  • the material of the tubular elements may also include a filler material, for example china clay, chalk or dolomite.
  • the filler material typically comprises from 0% to 65%, and preferably from 0% to 30% by weight of the inner element. The inclusion of a filler material reduces the cost of the bearing without significantly affecting its performance.
  • the material may also include a lubricant material to reduce friction between the bearing and the propeller shaft.
  • a lubricant material to reduce friction between the bearing and the propeller shaft.
  • This may be a solid lubricant, for example graphite, PTFE or molybdenum disulphide, or a liquid lubricant, for example hydrocarbon based oils, silicone oils or polyester based oils.
  • the lubricant material typically comprises from 0% to 35%, and preferably from 10% to 15% by weight of the bearing material.
  • the tubular elements 14, 16 may be made for example by winding a resin-impregnated yarn around a mould to form a sleeve. If required, the yarn may be wound helically, so that the fibres extend both circumferentially and longitudinally.
  • the fibrous material may be provided in the form of a woven fabric, in which case the fibres will extend both circumferentially and longitudinally, or a non-woven sheet such as a needle felt, in which case fibres will extend circumferentially, radially and longitudinally.
  • the mould may be tapered to provide the required frusto-conical faces.
  • the moulded product may be machined using a reamer or a lathe to provide the required frusto-conical faces.
  • the bearing is made of a thermoplastic material, it may be possible to cast it in the required shape, thus avoiding the need for a machining process.
  • tubular elements are manufactured to different complementary sizes, which can all be fitted one within another. Any desired combination of internal and external diameters can then be provided by selecting an appropriate set of tubular elements and assembling them to form the bearing. As the tubular elements have matched frusto- conical faces they can be assembled easily and a layer of adhesive can be provided between the adjacent faces to form a permanent bond. Once the required set of tubular elements have been assembled and bonded together, the inner and outer faces can be shaped by machining to match the diameter of the shaft and the support structure (for example the stern tube) in which the bearing is mounted, and to provide other required features such as oilways and key ways.
  • a bearing for a propeller shaft with a diameter of 625mm that is housed in a stern tube with a diameter of 720mm can be assembled using three tubular elements with frusto-conical faces having the following dimensions in mm:
  • the bearing may be any plain bearing for a rotary shaft.
  • the invention has particular value when used for a marine bearing, for example a propeller shaft bearing, a stern tube bearing, a steering gear bearing, a stabiliser bearing, a pintle bearing, a stern roller bearing or a rudder bearing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Sliding-Contact Bearings (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

La présente invention concerne un palier lisse (2) pour un arbre rotatif comprenant une pluralité d'éléments tubulaires coaxiaux (14, 16) fabriqués à partir de matériaux sensiblement non-métalliques et montés les uns à l'intérieur des autres. La pluralité d'éléments tubulaires (14, 16) comprend un premier élément tubulaire (14) ayant une face externe (14') et un second élément tubulaire (16) ayant une face interne (16") qui vient en prise avec la face extérieure du premier élément tubulaire, lesdites faces externe et interne (14', 16") étant de forme frustoconique sensiblement similaire.
PCT/GB2013/051404 2012-06-14 2013-05-28 Palier lisse WO2013186527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1210585.4 2012-06-14
GB1210585.4A GB2503017B (en) 2012-06-14 2012-06-14 Plain bearing

Publications (1)

Publication Number Publication Date
WO2013186527A1 true WO2013186527A1 (fr) 2013-12-19

Family

ID=46640937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2013/051404 WO2013186527A1 (fr) 2012-06-14 2013-05-28 Palier lisse

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GB (1) GB2503017B (fr)
WO (1) WO2013186527A1 (fr)

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* Cited by examiner, † Cited by third party
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GB2521362A (en) * 2013-12-17 2015-06-24 Rtsil Uk Ltd W Method of manufacturing a cylindrical article

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FR881158A (fr) * 1942-04-11 1943-04-16 Coussinet pour industrie chimique
US3697346A (en) * 1970-12-01 1972-10-10 Textron Inc Method of making a composite plastic bearing
GB2382556A (en) * 2001-11-30 2003-06-04 Railko Ltd Propeller shaft bearing

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US4352527A (en) * 1980-07-15 1982-10-05 Scatra Ab Water-lubricated bearing construction for ship's propeller shaft
DE3715353A1 (de) * 1987-05-08 1988-11-24 Continental Ag Wellenlager mit wasserschmierung
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FR881158A (fr) * 1942-04-11 1943-04-16 Coussinet pour industrie chimique
US3697346A (en) * 1970-12-01 1972-10-10 Textron Inc Method of making a composite plastic bearing
GB2382556A (en) * 2001-11-30 2003-06-04 Railko Ltd Propeller shaft bearing

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GB201210585D0 (en) 2012-08-01
GB2503017B (en) 2018-08-08
GB2503017A (en) 2013-12-18

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