WO2003020620A1 - Rouleau de support pour convoyeur a bande a ciel ouvert et son utilisation - Google Patents

Rouleau de support pour convoyeur a bande a ciel ouvert et son utilisation Download PDF

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Publication number
WO2003020620A1
WO2003020620A1 PCT/ES2002/000414 ES0200414W WO03020620A1 WO 2003020620 A1 WO2003020620 A1 WO 2003020620A1 ES 0200414 W ES0200414 W ES 0200414W WO 03020620 A1 WO03020620 A1 WO 03020620A1
Authority
WO
WIPO (PCT)
Prior art keywords
support roller
roller according
bearing
cylindrical housing
rotation
Prior art date
Application number
PCT/ES2002/000414
Other languages
English (en)
Spanish (es)
Inventor
Octavi Puigdollers Segura
Original Assignee
Bezanmetal S.L.
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 Bezanmetal S.L. filed Critical Bezanmetal S.L.
Publication of WO2003020620A1 publication Critical patent/WO2003020620A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/10—Arrangements of rollers
    • B65G39/12—Arrangements of rollers mounted on framework
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/02—Adaptations of individual rollers and supports therefor
    • 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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • 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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft

Definitions

  • the invention relates to a support roller for opencast conveyor belt comprising a cylindrical housing, at least one bearing and at least one axis of rotation.
  • the invention also makes reference to preferred uses of a roller according to the invention.
  • conveyor belts are used to transport material.
  • These conveyor belts usually have support rollers on which the belt rests.
  • These support rollers have a metal cylindrical housing and can freely rotate around their geometric axis, for which they usually have a conventional metal bearing (for example a ball bearing) at each end of the cylindrical housing and an axis of coaxial rotation with the geometric axis of the housing that crosses the entire housing and that rests on the two bearings.
  • These rollers usually present a series of inconveniences when they are used in more or less aggressive environments, in particular in the open air or open sky, as well as in environments with dirt and / or dust.
  • the bearings oxidize and get stuck, stopping spinning. This presents problems of noise and wear of the tape, when it touches the surface of the metal housing. This forces frequent maintenance work. Summary of the invention
  • the object of the invention is to overcome these drawbacks.
  • This purpose is achieved by means of a support roller for open conveyor belts characterized in that the cylindrical housing is made of reinforced plastic material, and the bearing (s) are made of thermoplastic material (for example polypropylene) with an addition of a solid lubricant.
  • This addition is preferably molybdenum bisulfide and is preferably between 30% and 70% by weight, although other solid lubricants, such as graphite, are also possible.
  • the thermoplastic material used in the manufacture of the bearing can be PTFE, PEEK (polyether ether ketone) or polyamide. These materials have good mechanical properties, combined with good resistance to high temperatures and good chemical resistance.
  • rollers according to the invention do not have rust problems, do not present noise problems, have a lower weight, and their cost can be 50% lower than an equivalent metal roller.
  • thermoplastic material bearings with a solid lubricant such as the aforementioned molybdenum bisulphide
  • thermoplastic material bearings with molybdenum bisulfide are resistant to high temperatures, so they do not deform, as is the case when trying to use nylon bearings.
  • the reinforced plastic material of the housing is an electrostatic material.
  • these rollers are usually used in more or less aggressive environments, often with dirt and / or dust. In this sense it is common for the powder to adhere, by electrostatic forces, to the roller, which accelerates its aging.
  • the reinforced plastic material that forms the cylindrical housing is an electrostatic material substantially reduces the amount of dust and particles adhering on the roller and, therefore, lengthens the life of the same.
  • the cylindrical housing is made of a polyolefin (advantageously polypropylene) reinforced with fiberglass, which has good electrostatic properties.
  • the housing of reinforced plastic material is of a polyolefin, preferably polypropylene, reinforced with fiberglass lies in the fact that, in this way, In the event that the roller stops rotating for any incident, the wear of the conveyor belt when rubbing with the housing is much less.
  • the roller can have a rotation axis that crosses the entire interior of the cylindrical housing, but preferably the roller has two coaxial rotation axes, each of which rests on one of the bearings of thermoplastic material with bisulfide Molybdenum This saves weight and material cost.
  • the cylindrical housing has an external surface of low coefficient of friction. This is preferably achieved by coating the cylindrical shell with hard petroleum jelly or PTFE (Teflon®). It should be taken into account that during the operation of the roller, it rotates on its axis at the same time that a conveyor belt moves over it. Ideally, the translation speed of the conveyor belt and the speed of rotation of the roller are synchronized, so that there is no relative movement between them. However, in practice this relative movement is usually present (to a greater or lesser degree) which causes friction forces. By coating the cylindrical housing of a material with a low coefficient of friction, these friction forces are reduced, which results in a lower drag effort and a longer service life of all components.
  • PTFE Teflon®
  • the cylindrical housing with an external surface of high wear resistance.
  • this is achieved by providing the cylindrical shell with a coating of synthetic elastomer, rubber or rubber.
  • a synthetic elastomer, rubber or rubber coating promotes the rotation of the support roller.
  • Another additional improvement consists in giving a boron nitride or hard chromium coating to the axis of rotation.
  • the axis of rotation is normally metallic, for example of iron. Hence the axis of rotation should have a life much greater than that of the bearing or the cylindrical housing. However, in certain cases the axis of metal rotation can deteriorate more quickly than the rest of the roller components. Effectively in the aggressive environments mentioned above - TO -
  • a particle of high hardness is lodged between the bearing and the axis of rotation.
  • this high hardness particle must be housed inside the thermoplastic mass of the bearing.
  • this hard particle may remain in contact with the axis of rotation and cause high wear on it, until it causes failure. Therefore, a surface coating that increases the hardness of the rotation axis, such as a boron nitride or hard chromium coating, can be an advantage of interest.
  • the support roller has at least one axial bearing that rests on the internal surface (that is, the surface facing the interior of the support roller) of the thermoplastic material bearing.
  • the thermoplastic material bearing has a capacity to withstand limited axial stresses. By adding an axial bearing, the ability to withstand axial stresses can be significantly improved.
  • the axial bearing is arranged inside the support roller, resting on the inner surface of the thermoplastic material bearing.
  • the thermoplastic material bearing may be provided with some extension or skirt which protrudes from its internal surface and partially envelops the axial bearing, thus protecting it further from the surroundings.
  • the support rollers according to the invention are used in open-air installations and / or in more or less aggressive environments (high humidity, more or less corrosive environments, such as marine environments, environments with more or less abrasive powders, etc. .), such as port facilities, quarries and mines.
  • Fig. 1 a cross-sectional view of a first roller according to the invention.
  • Fig. 2 a cross-sectional view of a second roller according to the invention.
  • Fig. 3 a view of a partial cross section of a third roller according to the invention.
  • Fig. 4 a view of a partial cross section of the roller of Fig. 3 with a grease nipple.
  • the support roller of Fig. 1 has a cylindrical shell 1 made of glass fiber reinforced polypropylene.
  • a bearing 3 of thermoplastic material with molybdenum bisulfide.
  • the bearing 3 is fixed to the housing 1 by any suitable means, for example, by means of screws.
  • Each of the bearings 3 has a central through hole, both coaxial holes being with each other.
  • a turning shaft 5 is housed in each hole, with an external end 7 suitable for being fixed to an external support structure.
  • the turning shafts 5 are made of stainless steel, preferably with a boron nitride or hard chrome coating.
  • Each of the pivot axes 5 has an internal end 9 with a larger diameter.
  • Molybdenum bisulfide has good properties as a lubricating material, as well as adequate mechanical and heat resistance characteristics. In this way weight savings are achieved, the elimination of jamming problems (iron bearings, such as conventional ball bearings, are frequently clogged by problems of oxides and / or surplus / dust) and the elimination of noise problems
  • the plastic housing also has advantages, since the problems of oxides, noise, premature wear of the conveyor belt disappear, and significant weight savings are achieved.
  • the support roller according to the invention also supposes an important saving in costs, both manufacturing and maintenance.
  • Fig. 2 a variant of support roller is shown, in which the axis of rotation 5a is a single through axis that crosses both holes of both bearings 3.
  • Fig. 3 Another embodiment of the invention is shown in Fig. 3.
  • the bearing 3 does not extend from the axis of rotation 5 to the housing 1, but between the housing 1 and the bearing 3 there is a support 15, made of thermoplastic material.
  • the support 15 allows, on the one hand, to reduce the size of the bearing 3 (with the consequent cost savings) and, on the other hand, to achieve a better dimensional stability.
  • the roller of Fig. 3 also has an axial bearing 17, fixed with a support ring 19.
  • the axial bearing 17 allows greater axial stresses to be absorbed, and has a lubricating retainer 21 which allows the axial bearing 17 to be properly lubricated.
  • FIG. 4 A variant of the roller of Fig. 3 is shown in Fig. 4.
  • the pivot shaft 5 has a lubrication duct 23 extending from the outer end 7 of the pivot shaft 5 to an intermediate point of the contact surface between the axis of rotation 5 and the bearing 3 of thermoplastic material.
  • a greaser 25 closes the open end of the lubrication duct 23.
  • the greaser 25 can be any conventional greaser, for example a greaser formed by a housing 27 inside which a closing ball 29 and a spring 31 are housed. of embodiment presented in Fig. 4 further improves the performance of the roller of the invention, since the performance of a liquid lubricant that is injected into the lubrication line is added to the lubricant properties of the solid lubricant included in the bearing 3 23 through the oiler 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Rolling Contact Bearings (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

L'invention concerne un rouleau de support pour convoyeur à bande à ciel ouvert et son utilisation. Ce rouleau de support comprend une carcasse cylindrique, deux paliers et au moins un arbre de rotation. Ladite carcasse cylindrique est en matériau plastique renforcé ayant de préférence de bonnes propriétés antiélectrostatiques, notamment du propylène renforcé à fibres de verre. Le coussinet est en matériau thermoplastique auquel on a ajouté entre 30 % et 70 % en poids, d'un lubrifiant solide, tel que le bisulfure de molybdène. La carcasse cylindrique présente une surface externe de bas coefficient de friction et/ou de résistance élevée à l'usure. L'axe de rotation peut présenter un revêtement de nitrure de bore ou de chrome dur. La carcasse cylindrique peut être remplie d'un matériau de remplissage. Le rouleau s'utilise de préférence dans des installations portuaires, des carrières et des mines et/ou dans le secteur de l'alimentation.
PCT/ES2002/000414 2001-09-06 2002-08-29 Rouleau de support pour convoyeur a bande a ciel ouvert et son utilisation WO2003020620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP0102017 2001-09-06
ES200102017 2001-09-06

Publications (1)

Publication Number Publication Date
WO2003020620A1 true WO2003020620A1 (fr) 2003-03-13

Family

ID=8498851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2002/000414 WO2003020620A1 (fr) 2001-09-06 2002-08-29 Rouleau de support pour convoyeur a bande a ciel ouvert et son utilisation

Country Status (1)

Country Link
WO (1) WO2003020620A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126737A1 (fr) * 2011-03-23 2012-09-27 Abb Schweiz Ag Unité d'entraînement pour installation de convoyeur à courroie
CN103129940A (zh) * 2013-03-19 2013-06-05 汤阴县华北工业塑料装备有限公司 托辊轴承座
CN104670835A (zh) * 2015-02-11 2015-06-03 无锡惠发特精密机械有限公司 带式输送机用托辊
US9573765B2 (en) 2011-08-23 2017-02-21 Siemens Aktiengesellschaft Belt-conveying installation, method for operating the same, and use thereof

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353644A (en) * 1966-01-24 1967-11-21 Colonial Plastics Mfg Co Roller for a conveyor
US4079492A (en) * 1975-03-22 1978-03-21 R. Stahl Aufzuge Gmbh Method of making bearing pulley
US4213523A (en) * 1978-09-11 1980-07-22 C. L. Frost & Son, Inc. Conveyor roller assembly
EP0047234A2 (fr) * 1980-08-28 1982-03-10 RISTA-Drahtwerk, Hufnagl & Co. Gesellschaft m.b.H. Arrangement pour paliers antifriction pour laminoir à froid
JPS61112818A (ja) * 1984-11-07 1986-05-30 Canon Inc 流体軸受
DE3608480A1 (de) * 1986-03-14 1987-09-17 Skf Gleitlager Gmbh Verfahren und vorrichtung zum herstellen einer transportrolle fuer rollgaenge, insbesondere zum foerdern von guetern in einem schrumpftunnel von verpackungsmaschinen
JPH03239756A (ja) * 1990-02-19 1991-10-25 Sutaaraito Kogyo Kk 摺動部材組成物
US5287030A (en) * 1992-03-23 1994-02-15 Electric Motors And Specialties, Inc. Electric motor construction
US5421441A (en) * 1994-02-22 1995-06-06 Mason; William R. Stub axle assembly for conveyor roller
ES2071423T3 (es) * 1991-11-27 1995-06-16 Both Ind Services Rodillo, especialmente aplicable a una maquina de impresion.
ES2108176T3 (es) * 1992-08-13 1997-12-16 Sgl Technik Gmbh Cilindro de plastico reforzado por fibras con capa de plastico exterior resistente al desgaste y dotada de material de relleno.
JPH10159854A (ja) * 1996-11-25 1998-06-16 Ntn Corp 複合滑り軸受
GB2329370A (en) * 1997-09-20 1999-03-24 John Pyle Securing a circular member to the end of a tubular body

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353644A (en) * 1966-01-24 1967-11-21 Colonial Plastics Mfg Co Roller for a conveyor
US4079492A (en) * 1975-03-22 1978-03-21 R. Stahl Aufzuge Gmbh Method of making bearing pulley
US4213523A (en) * 1978-09-11 1980-07-22 C. L. Frost & Son, Inc. Conveyor roller assembly
EP0047234A2 (fr) * 1980-08-28 1982-03-10 RISTA-Drahtwerk, Hufnagl & Co. Gesellschaft m.b.H. Arrangement pour paliers antifriction pour laminoir à froid
JPS61112818A (ja) * 1984-11-07 1986-05-30 Canon Inc 流体軸受
DE3608480A1 (de) * 1986-03-14 1987-09-17 Skf Gleitlager Gmbh Verfahren und vorrichtung zum herstellen einer transportrolle fuer rollgaenge, insbesondere zum foerdern von guetern in einem schrumpftunnel von verpackungsmaschinen
JPH03239756A (ja) * 1990-02-19 1991-10-25 Sutaaraito Kogyo Kk 摺動部材組成物
ES2071423T3 (es) * 1991-11-27 1995-06-16 Both Ind Services Rodillo, especialmente aplicable a una maquina de impresion.
US5287030A (en) * 1992-03-23 1994-02-15 Electric Motors And Specialties, Inc. Electric motor construction
ES2108176T3 (es) * 1992-08-13 1997-12-16 Sgl Technik Gmbh Cilindro de plastico reforzado por fibras con capa de plastico exterior resistente al desgaste y dotada de material de relleno.
US5421441A (en) * 1994-02-22 1995-06-06 Mason; William R. Stub axle assembly for conveyor roller
JPH10159854A (ja) * 1996-11-25 1998-06-16 Ntn Corp 複合滑り軸受
GB2329370A (en) * 1997-09-20 1999-03-24 John Pyle Securing a circular member to the end of a tubular body

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126737A1 (fr) * 2011-03-23 2012-09-27 Abb Schweiz Ag Unité d'entraînement pour installation de convoyeur à courroie
US9573765B2 (en) 2011-08-23 2017-02-21 Siemens Aktiengesellschaft Belt-conveying installation, method for operating the same, and use thereof
CN103129940A (zh) * 2013-03-19 2013-06-05 汤阴县华北工业塑料装备有限公司 托辊轴承座
CN104670835A (zh) * 2015-02-11 2015-06-03 无锡惠发特精密机械有限公司 带式输送机用托辊

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