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EP2350482A1 - Palier à roulement doté d'éléments d'étanchéité - Google Patents

Palier à roulement doté d'éléments d'étanchéité

Info

Publication number
EP2350482A1
EP2350482A1 EP09782637A EP09782637A EP2350482A1 EP 2350482 A1 EP2350482 A1 EP 2350482A1 EP 09782637 A EP09782637 A EP 09782637A EP 09782637 A EP09782637 A EP 09782637A EP 2350482 A1 EP2350482 A1 EP 2350482A1
Authority
EP
European Patent Office
Prior art keywords
ring
sealing lip
sealing
elements
rolling bearing
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Withdrawn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
EP09782637A
Other languages
German (de)
English (en)
Inventor
Jean-Luc Dallest
Gaël DELAPORTE
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2350482A1 publication Critical patent/EP2350482A1/fr
Withdrawn legal-status Critical Current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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • 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
    • F16C33/6618—Retaining the grease in or near the bearing in a reservoir in the sealing 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
    • 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
    • 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
    • F16C33/7859—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 further sealing element
    • F16C33/7863—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 further sealing element mounted to the inner race, e.g. a flinger to use centrifugal effect
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip

Definitions

  • the present invention relates to a rolling bearing with a first ring connected in the installed state with a rotating member and a connected to a fixed part second ring, between which roll to enable differential speeds rolling elements, on both sides of the rolling elements and between the first and the second ring Dichtelemen - te, which are each connected to the first ring and in each case via at least one first, extending in the radial and / or axial direction sealing lip with the second ring in contact, and shields are provided, which on the rolling elements facing away from the sides of the sealing elements placed and connected to the second ring.
  • sealing elements are usually provided between the rolling bearing rings. These sealing elements have the task, on the one hand to prevent penetration of the impurities into the interior of the bearing, which may otherwise lead to damage of the bearing, and on the other to prevent leakage of the lubricant present in the bearing.
  • these sealing elements are fixedly arranged on one of the two rings and are connected via sealing lips with the other ring in contact.
  • a rolling bearing in which a first, internal ring is connected to a rotating component and is in contact with a second, outer ring rolling over its outside rolling elements.
  • sealing elements are provided on both sides of the rolling elements on the inside of the second ring which are in contact with the first ring with an axially extending sealing lip.
  • a shield is provided on the rolling elements opposite side of each sealing element to further reduce the entry of dirt particles.
  • This shield is fixedly arranged on the first ring and thus ensures upon rotation of the first ring due to acting centrifugal forces for ejection of impinging media.
  • the respective sealing element has two further sealing lips, with which it is in axial and radial contact with the shield.
  • a disadvantage of such a design is that constantly three sealing lips are in contact with the rotating, first ring or with the co-rotating shield. This ensures high friction, which is particularly significant at higher speeds.
  • the invention comprises the technical teaching that the sealing elements each have a second, axially extending and radially outwardly oriented sealing lip, which is in contact with the respective shield at a standstill or low speeds of the first ring. From a defined differential speed, however, lifts this sealing lip due to the centrifugal forces acting on the respective shield.
  • Such an arrangement has the advantage that this second sealing lip at low speeds or standstill in addition to a first axially and / or radially extending sealing lip, which is in contact with the second ring, effectively contributes to a rejection of externally acting media. At higher speeds, this second sealing lip does not cause additional frictional losses of the system due to the lifting of the shield.
  • the sealing elements in each case in the region of the first sealing lip on a further, third sealing lip, which extends radially in the direction of the second ring and axially in the direction of the rolling elements and forms a narrow passage opening with the second ring.
  • the at least one first sealing lip forms, together with the second sealing lip and the respective shield, a chamber in which an accumulation of in the region of the second sealing lip Grease is provided.
  • the placement of lubricating grease in this area further complicates the entry of liquid or gaseous media via the second sealing lip and also reduces the friction between the second sealing lip and the shield.
  • the sealing elements each have in the region of the first ring via an axially oriented in the direction of the respective shield, fourth sealing lip, which forms a constriction together with the respective shield.
  • this creates a further barrier in front of the second sealing lip, which already intercepts a part of the media which has entered the intermediate space between the first ring and the shielding.
  • the shields are each connected via a press fit with the second ring. This ensures a secure fit of the shields at the desired location, while at the same time can be dispensed with further fixing means.
  • the first ring provides an outer ring and the second ring an inner ring of the rolling bearing there.
  • the rolling bearing is designed in the manner of a ball bearing. This advantageously provides a robust design of the rolling bearing there.
  • the sealing elements are each formed by a partially or completely surrounded with a polymer material support ring.
  • This has the advantage that the respective sealing element has a certain rigidity due to the support ring and is held at the desired position in the rolling bearing.
  • the single FIGURE shows a sectional view of the rolling bearing according to the invention in the region of a first ring 1 and a second ring 2, which correspondingly form a stationary inner ring and a rotating outer ring of the rolling bearing.
  • rolling elements 3 are arranged, which allow in the installed state of the rolling bearing relative speeds between the two rings 1 and 2.
  • a sealing element 4 is provided axially spaced from the rolling elements 3. The skilled person will be clear that this sealing element 4 is provided on both sides of the rolling elements 3.
  • the sealing element 4 is connected at one end fixed to the first ring 1 and is formed by a support ring 5, on which a polymer material is applied. At its other end, however, the sealing element 4 has a first sealing lip 6, which is in contact with the second ring 2 at its end. Further, on a side opposite the rolling elements 3 side of the sealing element 4, a shield 7 is provided which is fixed on the second ring 2 by means of a press connection and due to their radial extent in the direction of the first ring 1 the entry of media in the space between the first ring 1 and the second ring 2 is reduced.
  • the sealing element has a second sealing lip 8 which, starting from the sealing element 4, extends axially in the direction of the shield 7 and radially outward extends.
  • This second sealing lip 8 has the peculiarity of being at a standstill or low Speeds of the rolling bearing with the shield 7 is in contact, while it lifts off at a certain speed due to the centrifugal forces acting on it from the shield 7 and thus no longer provides for friction losses from this point.
  • the first sealing lip 6 forms here together with the second sealing lip 8 and the shield 7, a chamber 9, in which grease 10 is provided in particular in the region of the second sealing lip 8, at low speeds of the rolling bearing, the friction between the second sealing lip 8 and the shield 7 to reduce.
  • a third sealing lip 11 is provided, which together with the second ring 2 forms a narrowed passage opening in order to reduce leakage of lubricant from the interior of the rolling bearing at this point.
  • a further, fourth sealing lip 12 is placed in the region of the first ring 1, which narrows the passage to the second sealing lip 8 together with the shield 7.

Landscapes

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

Abstract

L'invention concerne un palier à roulement comportant une première bague (1) reliée à un élément rotatif à l'état monté et une deuxième bague (2) reliée à un élément fixe, des corps de roulement (3) roulant entre ces bagues pour permettre des vitesses de rotation différentielles. Des deux côtés des corps de roulement et entre la première (1) et la deuxième bague (2) sont disposés des éléments d'étanchéité (4), qui sont chacun reliés à la première bague (1) et en contact avec la deuxième bague (2) par l'intermédiaire d'au moins une première lèvre d'étanchéité (6) s'étendant dans le sens radial et/ou axial, ainsi que des éléments de protection (7), qui sont placés sur les faces des éléments d'étanchéité (4) opposées aux corps de roulement (3) et reliés à la deuxième bague (2). Selon l'invention, les éléments d'étanchéité (4) sont chacun pourvus d'une deuxième bague d'étanchéité (8) s'étendant dans le sens axial et orientée radialement vers l'extérieur, cette baguette d'étanchéité étant en contact avec l'élément de protection (7) correspondant, lorsque la première bague (1) est au repos ou à faible vitesse de rotation, et se détachant de l'élément de protection (7) correspondant sous l'effet de la force centrifuge, à partir d'une vitesse de rotation différentielle définie.
EP09782637A 2008-10-22 2009-09-04 Palier à roulement doté d'éléments d'étanchéité Withdrawn EP2350482A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008052726A DE102008052726A1 (de) 2008-10-22 2008-10-22 Wälzlager mit Dichtelementen
PCT/EP2009/061491 WO2010046173A1 (fr) 2008-10-22 2009-09-04 Palier à roulement doté d'éléments d'étanchéité

Publications (1)

Publication Number Publication Date
EP2350482A1 true EP2350482A1 (fr) 2011-08-03

Family

ID=41683245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09782637A Withdrawn EP2350482A1 (fr) 2008-10-22 2009-09-04 Palier à roulement doté d'éléments d'étanchéité

Country Status (3)

Country Link
EP (1) EP2350482A1 (fr)
DE (1) DE102008052726A1 (fr)
WO (1) WO2010046173A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140225332A1 (en) * 2011-08-25 2014-08-14 Pieter Baart Lubricated seal with axial lip
DE102011086953A1 (de) * 2011-11-23 2013-05-23 Aktiebolaget Skf Dichtungsanordnung
DE102017116875A1 (de) 2017-07-26 2019-01-31 Thyssenkrupp Ag Kombination eines Wälzlagers und mindestens eines Abdeckelements sowie Walzenmühle

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1568654A (fr) * 1967-06-16 1969-05-23
US4572516A (en) * 1985-06-12 1986-02-25 General Motors Corporation Low friction dynamic seal assembly with centrifugal deflection
DE3616999A1 (de) * 1986-05-21 1987-11-26 Kugelfischer G Schaefer & Co Dichtung, insbesondere fuer waelzlager
FR2644544B1 (fr) * 1989-03-14 1991-12-20 Roulements Soc Nouvelle Garniture d'etancheite entre deux pieces coaxiales
WO2000040487A1 (fr) * 1999-01-05 2000-07-13 Prok Group Limited Ensemble joint d'etancheite externe et ensemble joint d'etancheite pour roulement a rouleaux
DE10037530A1 (de) * 1999-08-31 2001-03-22 Ntn Toyo Bearing Co Ltd Dichtungsvorrichtung für Lager
JP2001304278A (ja) * 1999-10-08 2001-10-31 Nsk Ltd 密封形軸受装置
JP4295487B2 (ja) * 2002-10-15 2009-07-15 株式会社荒井製作所 密封装置
DE10335713B4 (de) 2003-08-05 2008-02-14 FAG Kugelfischer Georg Schäfer AG Abdichtung für Radialwälzlager
DE10336341A1 (de) * 2003-08-08 2005-03-10 Ina Schaeffler Kg Abdichtung für ein Wälzlager
JP2005140147A (ja) * 2003-11-04 2005-06-02 Ntn Corp 外輪回転形転がり軸受
US8308370B2 (en) * 2008-02-25 2012-11-13 Jtekt Corporation Sealing device for bearing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010046173A1 *

Also Published As

Publication number Publication date
DE102008052726A1 (de) 2010-04-29
WO2010046173A1 (fr) 2010-04-29

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