FR2654478A1 - Method for improving sealing of a rolling bearing - Google Patents

Method for improving sealing of a rolling bearing Download PDF

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Publication number
FR2654478A1
FR2654478A1 FR8914890A FR8914890A FR2654478A1 FR 2654478 A1 FR2654478 A1 FR 2654478A1 FR 8914890 A FR8914890 A FR 8914890A FR 8914890 A FR8914890 A FR 8914890A FR 2654478 A1 FR2654478 A1 FR 2654478A1
Authority
FR
France
Prior art keywords
bearing
rolling bearing
ring
improving sealing
sealing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR8914890A
Other languages
French (fr)
Inventor
Michaud Thierry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN SNR Roulements SA
Original Assignee
Societe Nouvelle de Roulements SNR SA
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 Societe Nouvelle de Roulements SNR SA filed Critical Societe Nouvelle de Roulements SNR SA
Priority to FR8914890A priority Critical patent/FR2654478A1/en
Publication of FR2654478A1 publication Critical patent/FR2654478A1/en
Withdrawn legal-status Critical Current

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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
    • C23C22/62—Treatment of iron or alloys based thereon
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7896—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members with two or more discrete sealings arranged in series
    • 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
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer race

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Method for improving sealing of a rolling bearing in which a sealing device is in frictional contact with a bearing race, which method consists in soaking the degreased race at the end of the manufacturing process in a bath heated to between 110 and 130 DEG and consisting of a solution of nitrate or sodium nitrite, of caustic soda, and of water, and, after rinsing and drying, in assembling the constituent parts of the rolling bearing and in lubricating the assembled unit.

Description

L'invention concerne un procède por améliorer l'étanchéité d'un roulement et plus particulièrement un roulement dans lequel un dispositif d'étanchéité est en contact frottant avec une bague intérieure ou extérieure.The invention relates to a method for improving the sealing of a bearing and more particularly a bearing in which a sealing device is in rubbing contact with an inner or outer ring.

Le procédé s'applique avantageusement aux roulements destinés à fonctionner dans une atmosphère corrosive tel qu'un brouillard salin et exposés à des projections d'eau salée de sable ou de boue.The method advantageously applies to bearings intended to operate in a corrosive atmosphere such as a salt spray and exposed to salt water splashes of sand or mud.

On cnnaît un traitement de surface de pièces métalliques préalablement dégraissées par trempe de celles-ci dans une solution de nitrate de soude, de soude et d eau portée à 1300 dans le but à obtenir à la surface de la pièce un revêtement de magnétite.There is a surface treatment of metal parts which have been degreased beforehand by soaking them in a solution of sodium nitrate, soda and water brought to 1300 in order to obtain a coating of magnetite on the surface of the part.

Le problème non résolu sur les roulements réputés étanches utilisés par exemple dans le montage des joints de transmission ou de paliers de roues de véhicules automobiles réside dans le fait que le lubrifiant perd ses caractéristiques d'adhérence par suite du fonctionnement du roulement en milieu corrosif Conformément à l'invention ce problème est résolu en ce que la bague du roulement en fin de sc.n processus de fabrication est trempée dans un bain constitué par exemple par une solution composée par 13 % de nitrite de sodium (Na NO2) ou (Na NO3, 36 % de soude caustique (Na OH) 51 % d'eau, à une température comprise entre 110 et 13e pendant une période comprise entre 10 et 15 min. The unresolved problem on bearings deemed to be sealed, used for example in the assembly of transmission seals or wheel bearings of motor vehicles lies in the fact that the lubricant loses its adhesion characteristics due to the functioning of the bearing in a corrosive environment In the invention, this problem is solved in that the bearing ring at the end of the manufacturing process is soaked in a bath consisting, for example, of a solution composed of 13% sodium nitrite (Na NO2) or (Na NO3, 36% caustic soda (Na OH) 51% water, at a temperature between 110 and 13th for a period between 10 and 15 min.

La bague ainsi traitée rincée et séchée est donc revetue par un déport de magnétite (Fe3C > 4) d'aspect noir foncé, lisses homogène et dur; d'épaisseur comprise entre 0,5 et 1 micromètre. Elle peut entre ainsi utilisée sur la chalne d'assemblage du roulement. The ring thus treated rinsed and dried is therefore coated with a magnetite offset (Fe3C> 4) of dark black appearance, smooth, homogeneous and hard; thickness between 0.5 and 1 micrometer. It can thus be used on the bearing assembly chain.

Ce dépit possède l'avantage de retenir une graisse de roulement telle que la graisse de marque MOBIL EXFE4DU par exemple introduite dans le roulement en cours d'assemblage.This spite has the advantage of retaining a bearing grease such as the brand MOBIL EXFE4DU grease, for example introduced into the bearing during assembly.

Le traitement précité utilisé avant assemblage du roulement possède l'avantage de réduire le frottement entre le joint d'étanchéité et la bague et protège la bague contre les risques d'oxydation.The aforementioned treatment used before assembly of the bearing has the advantage of reducing the friction between the seal and the ring and protects the ring against the risks of oxidation.

D'autres caractéristiques de l'invention apparaltrc.nt à la lecture de la description de la figure qui il lustre un exemple de réalisation d 'un roulement faisant application du procédé
La figure illustre une coupe radiale partielle d'un roulement dont on a montré la bague extérieure 1 , la bague intérieure 2, les corps roulantes 3 disposés dans une cage 4 entre lesdites bagues i 2.Other characteristics of the invention appear on reading the description of the figure which illustrates an example of an embodiment of a bearing applying the method
The figure illustrates a partial radial section of a bearing, the outer ring 1, the inner ring 2 and the rolling bodies 3 shown in a cage 4 between said rings i 2 have been shown.

Un dispositif d'étanchéité 5 comporte un premier joint d étanchéité 10 monté sur la bague 1, un deuxième joint d'étanchéité 11 monté sur la bague 2 et une chambre 13 disposée entre les joints 10, il. A sealing device 5 comprises a first seal 10 mounted on the ring 1, a second seal 11 mounted on the ring 2 and a chamber 13 disposed between the seals 10, il.

La chambre 13 est remplie d'une graisse.Chamber 13 is filled with grease.

Dans cet exemple la bague 2 a subi le traitement conforme au procédé mais il est évident que celui-ci peut tout aussi bien s'appliquer à la bague I. On retiendra que la bague traitée doit nécessairement être celle qui constitue l'appui du joint d'étanchéité frottant. In this example, the ring 2 has undergone the treatment in accordance with the process, but it is obvious that it can just as easily be applied to the ring I. It will be noted that the treated ring must necessarily be that which constitutes the support of the seal. rubbing seal.

Claims (1)

R E V E N D I C A T I O N SR E V E N D I C A T I O N S Procédé pour améliorer 1 'étanchéité d'un roulement dans lequel un dispositif d'étanchéité est un contrat frottant avec une bague de roulement, qui consiste à tremper la bague dégraissée en fin du processus de fabrication dans un bain chauffé entre 110 et 130 constitué par une solution composée de nitrate ou nitrite de sodium; de soude caustique; et d'eau, à assembler après rinçage et séchage les constituants du roulement et à graisser l'ensemble monté.  Method for improving the sealing of a bearing in which a sealing device is a rubbing contract with a bearing ring, which consists in dipping the degreased ring at the end of the manufacturing process in a heated bath between 110 and 130 constituted by a solution composed of sodium nitrate or nitrite; caustic soda; and water, to assemble the components of the bearing after rinsing and drying and to lubricate the assembled assembly.
FR8914890A 1989-11-14 1989-11-14 Method for improving sealing of a rolling bearing Withdrawn FR2654478A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8914890A FR2654478A1 (en) 1989-11-14 1989-11-14 Method for improving sealing of a rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8914890A FR2654478A1 (en) 1989-11-14 1989-11-14 Method for improving sealing of a rolling bearing

Publications (1)

Publication Number Publication Date
FR2654478A1 true FR2654478A1 (en) 1991-05-17

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Family Applications (1)

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FR8914890A Withdrawn FR2654478A1 (en) 1989-11-14 1989-11-14 Method for improving sealing of a rolling bearing

Country Status (1)

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FR (1) FR2654478A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009077108A2 (en) * 2007-12-17 2009-06-25 Ab Skf Roller-stressed components and method for surface treatment of a roller-stressed component
CN103375493A (en) * 2012-04-27 2013-10-30 上海中隆轴承有限公司 Combined sealing structure with double seal rings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1000035A (en) * 1949-10-07 1952-02-07 Ferrous metal processing
FR1013748A (en) * 1949-02-14 1952-08-04 Bataafsche Petroleum Corrosion protection process
FR2232616A1 (en) * 1973-06-09 1975-01-03 Daimler Benz Ag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1013748A (en) * 1949-02-14 1952-08-04 Bataafsche Petroleum Corrosion protection process
FR1000035A (en) * 1949-10-07 1952-02-07 Ferrous metal processing
FR2232616A1 (en) * 1973-06-09 1975-01-03 Daimler Benz Ag

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009077108A2 (en) * 2007-12-17 2009-06-25 Ab Skf Roller-stressed components and method for surface treatment of a roller-stressed component
WO2009077108A3 (en) * 2007-12-17 2010-03-11 Ab Skf Roller-stressed components and method for surface treatment of a roller-stressed component
CN103375493A (en) * 2012-04-27 2013-10-30 上海中隆轴承有限公司 Combined sealing structure with double seal rings

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