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WO1998031947A1 - Support de poulies - Google Patents

Support de poulies Download PDF

Info

Publication number
WO1998031947A1
WO1998031947A1 PCT/DE1998/000101 DE9800101W WO9831947A1 WO 1998031947 A1 WO1998031947 A1 WO 1998031947A1 DE 9800101 W DE9800101 W DE 9800101W WO 9831947 A1 WO9831947 A1 WO 9831947A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnets
storage
osculation
roller
races
Prior art date
Application number
PCT/DE1998/000101
Other languages
German (de)
English (en)
Inventor
Heinrich Winter
Original Assignee
Skf Gmbh
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 Skf Gmbh filed Critical Skf Gmbh
Priority to EP98902959A priority Critical patent/EP0953120A1/fr
Publication of WO1998031947A1 publication Critical patent/WO1998031947A1/fr

Links

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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0402—Bearings not otherwise provided for using magnetic or electric supporting means combined with other supporting means, e.g. hybrid bearings with both magnetic and fluid supporting means
    • 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
    • F16C32/0427—Passive magnetic bearings with permanent magnets on both parts repelling each other for axial load mainly

Definitions

  • DE patent application P 196 086 70 has already proposed using a ball bearing with races made of heat-resistant steel and ceramic balls for the storage of deflection rollers in molten metal.
  • a tub with molten zinc is provided for the galvanizing of a continuous sheet web. This is diverted via a roller arranged in a hot zinc bath at more than 400 degrees Celsius. It is suspended on a frame and rotatably mounted on the shaft ends via the ball bearings mentioned.
  • the aggressive, molten zinc bath flows around practically the entire bearing, since reliable sealing at this temperature and this medium is not possible. This results in unavoidable wear, particularly on the raceways of the steel races.
  • this is achieved by races with only radially loaded raceways, which are reduced in the osculation to the balls, and central ceramic balls arranged in the region of the end faces of the roller journals.
  • This greatly reduces the amount of sliding friction that inevitably occurs in ball bearings with tighter osculation. Although this is paid for by the insufficient axial flow at this point, the axial guidance of ceramic balls in the center of the end face of the roller journals is taken over.
  • the low osculation significantly reduces wear in the sliding friction area of the raceway raceway.
  • the ball bearings can compensate for greater axial play without reaching the area of unauthorized axial loads. This is particularly important in the application mentioned with large dimensions and tolerances of the roll.
  • the ceramic balls are exposed to sliding friction, even if only slightly, so that there is a desire for further optimization.
  • the object of the invention is to improve the storage of the type mentioned in such a way that wear is reduced, in particular in the area of the axial support, in the sense of a longer service life.
  • the supporting elements consist of temperature-resistant permanent magnets, one each being arranged on the end face of the roller journal and the other coaxially on the supporting frame and these repel each other in time.
  • the permanent magnets thus form a contact-free support and are therefore wear-free.
  • the single figure shows the bearing of one end of a roller 1 with a ball bearing low osculation.
  • the roller 1 is mounted on the same side on both sides and is rotatably arranged above it in a support frame 2.
  • the entire arrangement works in a zinc bath, not shown, with the bearings being washed with liquid zinc.
  • the ball bearing shown consists of races 3, 4, made of heat-resistant steel and balls 5 made of ceramic.
  • the inner ring 4 seated on the roller journal 6 and secured with a nut 7 is provided with a cylindrical raceway 8.
  • the outer ring 3 sits in the only indicated support frame 2 and has one opposite Ball radius significantly more curved raceway profile 9. This results in a greatly reduced osculation to the ball 5.
  • the ball bearing is therefore not suitable for axial loads. With this construction, the proportion of sliding friction between balls 5 and the raceway 9 of the outer ring 3 is considerably lower, and that on the inner ring 4 is theoretically zero.
  • the axial support is provided on both sides on each roller pin 6 by a pair of mutually repelling permanent magnets 10. One of them is inserted into a recess 11 on the end face, the other in a corresponding recess 11 on the support frame 2. Between the pole faces 12 left a small gap 13, which allows axial movement of the roller 1. The characteristic of the repulsive force is known to be extremely progressive, so that contact with the pole faces 12 is excluded under normal operating conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Crushing And Grinding (AREA)

Abstract

Pour le support de poulies de renvoi (1) placées dans du métal fondu, on utilise des roulements à billes (3, 4, 5) présentant une faible osculation (9), afin de compenser des variations de longueur dues à la température. Le guidage axial ainsi réduit est amélioré par des aimants (10, 19) montés sur la face. Des aimants permanents (10, 11) se repoussant mutuellement sont placés par ex. au niveau du centre de rotation de l'arbre (1) et dans la partie de cadre (2) opposée.
PCT/DE1998/000101 1997-01-15 1998-01-12 Support de poulies WO1998031947A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98902959A EP0953120A1 (fr) 1997-01-15 1998-01-12 Support de poulies

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29700576.6 1997-01-15
DE29700576U DE29700576U1 (de) 1997-01-15 1997-01-15 Lagerung von Rollen

Publications (1)

Publication Number Publication Date
WO1998031947A1 true WO1998031947A1 (fr) 1998-07-23

Family

ID=8034559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/000101 WO1998031947A1 (fr) 1997-01-15 1998-01-12 Support de poulies

Country Status (3)

Country Link
EP (1) EP0953120A1 (fr)
DE (1) DE29700576U1 (fr)
WO (1) WO1998031947A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007984A1 (fr) * 2002-07-10 2004-01-22 Turbocor Inc. Dispositif reduisant la charge axiale dans un systeme de palier de rotor au moyen d'aimants permanents
DE102005024004A1 (de) * 2005-05-25 2006-12-07 Schaeffler Kg Drehlagereinrichtung, insbesondere für einen drehbaren Rundtisch einer Werkzeugmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902360A (en) * 1987-02-04 1990-02-20 Crucible Materials Corporation Permanent magnet alloy for elevated temperature applications
DE4439660A1 (de) * 1993-11-05 1995-07-06 Nsk Ltd Walzenunterstützungsvorrichtung in Metallschmelze-Tauchbad
DE19500935A1 (de) * 1994-01-14 1995-07-20 Inst Maschinenelemente Uni Stu Bauteilpaarung
DE19608670A1 (de) 1996-03-06 1997-09-11 Skf Gmbh Lagerung von Rollen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902360A (en) * 1987-02-04 1990-02-20 Crucible Materials Corporation Permanent magnet alloy for elevated temperature applications
DE4439660A1 (de) * 1993-11-05 1995-07-06 Nsk Ltd Walzenunterstützungsvorrichtung in Metallschmelze-Tauchbad
DE19500935A1 (de) * 1994-01-14 1995-07-20 Inst Maschinenelemente Uni Stu Bauteilpaarung
DE19608670A1 (de) 1996-03-06 1997-09-11 Skf Gmbh Lagerung von Rollen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007984A1 (fr) * 2002-07-10 2004-01-22 Turbocor Inc. Dispositif reduisant la charge axiale dans un systeme de palier de rotor au moyen d'aimants permanents
US7800268B2 (en) 2002-07-10 2010-09-21 Danfoss Turbocor Compressors B.V. Device to relieve thrust load in a rotor-bearing system using permanent magnets
US8030814B2 (en) 2002-07-10 2011-10-04 Danfoss Turbocor Compressors B.V. Device to relieve thrust load in a rotor-bearing system using permanent magnets
DE102005024004A1 (de) * 2005-05-25 2006-12-07 Schaeffler Kg Drehlagereinrichtung, insbesondere für einen drehbaren Rundtisch einer Werkzeugmaschine

Also Published As

Publication number Publication date
DE29700576U1 (de) 1997-02-27
EP0953120A1 (fr) 1999-11-03

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