EP2399040A1 - Abdichtung für ein wälzlager - Google Patents
Abdichtung für ein wälzlagerInfo
- Publication number
- EP2399040A1 EP2399040A1 EP09799312A EP09799312A EP2399040A1 EP 2399040 A1 EP2399040 A1 EP 2399040A1 EP 09799312 A EP09799312 A EP 09799312A EP 09799312 A EP09799312 A EP 09799312A EP 2399040 A1 EP2399040 A1 EP 2399040A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing
- axially
- ring
- lip
- disc
- 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- Withdrawn
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 177
- 230000002787 reinforcement Effects 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 210000002414 leg Anatomy 0.000 description 14
- 239000002245 particle Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000003414 extremity Anatomy 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 101100116570 Caenorhabditis elegans cup-2 gene Proteins 0.000 description 1
- 101100116572 Drosophila melanogaster Der-1 gene Proteins 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008674 spewing Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F16C33/72—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
-
- 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
- F16C33/80—Labyrinth sealings
-
- 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
- F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
-
- 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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/63—Gears with belts and pulleys
Definitions
- the present invention relates to a seal for a rolling bearing, comprising an outer bearing ring or a housing, an inner bearing ring, cage-guided rolling elements and with the outer bearing ring or the housing encircling, elastic, a reinforcement having sealing ring, the form-fitting in a receptacle or an annular groove of the outer bearing ring is fixed in position, wherein the sealing ring is provided with a game in an undercut of the inner bearing ring adjacent to the rolling elements engaging first sealing lip and an axially spaced, directed away from the rolling elements, the second sealing lip.
- the present invention seeks to provide a seal for a rolling bearing, which provides improved protection against the ingress of moisture and foreign bodies in the bearing and an improved discharge of liquid or in the region of the seal Condensate guaranteed.
- a seal for a rolling bearing of the type mentioned comprising an outer bearing ring or a housing, an inner bearing ring, cage-guided rolling elements, and one with the outer bearing ring or housing encircling, elastic, a reinforcement having sealing ring, the form-fitting in a receptacle or an annular groove of the outer bearing ring is fixed in position, wherein the sealing ring is provided with a play in an undercut of the inner bearing ring, adjacent to the rolling elements engaging first sealing lip and an axially spaced, directed away from the rolling elements second sealing lip, the invention proposes that a rigid sealing disc with at least one inner, axially bent board is pressed onto a cylindrical surface of the inner bearing ring, the second, axially projecting in the direction of the sealing disc sealing lip with an inner surface of the inner, axially bent Bordes the Dichtsche ibe cooperates and a labyrinth gap is formed between an outer axially bent or bent leg of the sealing disc and the seal.
- the rigid sealing disc which consists of a corrosion-resistant material, such as stainless steel, or at least on the outside is coated corrosion-resistant, for example, galvanized and / or elastomeric is coated, provides a mechanical protection for the existing mainly of a soft-elastic material sealing ring.
- this seal is simplified, since first the sealing ring can be inserted into the rolling bearing and only then the sealing disc is pressed onto the inner bearing ring, wherein damage to the second sealing lip both during assembly of the sealing ring and when pressing the sealing washer avoided is, since this second sealing lip protrudes substantially horizontally and axially in the direction of the sealing disc and cooperates with the inner surface of the inner, axially bent Bordes the sealing disc.
- the labyrinth gap formed between the sealing disc and the sealing ring largely prevents the penetration of moisture and particles, but it allows the outflow of moisture or condensate ingress of the rolling bearing, as well as the ejection of moisture and particles penetrated at rotating bearing, since the Rotate sealing ring with the outer bearing ring.
- the first sealing lip is directed according to an advantageous development of the invention approximately radially inwardly into the undercut and rigid formed so that it at no time, neither at standstill of the bearing or at high speeds, with the wall surfaces of the undercut comes into contact and there none Frictional heat can arise.
- the second sealing lip protrudes axially approximately horizontally in the direction of the sealing disc and has a flexible edge, wherein it has a sealing edge which at standstill or low rotational speeds of the roller bearing on the cylindrical inner surface of the inner, axially bent towards the Wälz- body Bordes the sealing disc abradingly abuts and is lifted from the inner surface by the centrifugal force at higher speeds. This ensures that at standstill of the bearing no moisture can penetrate into the interior of the bearing, but that during the Rotation of the bearing no or only a slight friction between the sealing edge and the sealing disc occurs and thus no frictional heat and no wear can occur.
- the labyrinth gap starting from the free space between the sealing disc and the sealing ring, initially extends approximately axially inwardly between an axial projection on the sealing ring and an axially bent leg on the sealing disc, then approximately radially in the direction of the annular groove and finally approximately axially outwardly between the outer race and the axially bent leg.
- This arrangement ensures safe protection of the sealing ring by the sealing disc and at the same time allows the flow and spewing of moisture and particles from the space between the sealing disc and the sealing ring.
- the labyrinth gap starting from the free space between the sealing disc and the sealing ring initially approximately radially between the end of a bent leg on the sealing disc and the sealing ring and then approximately axially outwardly between the bent leg on the sealing disc and a extending axially outwardly projecting lip on the sealing ring.
- the lip of the sealing ring protrudes axially to approximately the outer surface of the sealing disc and forms the labyrinth gap with the bent limb on the sealing disc, without moisture and particles emerging or being ejected through this labyrinth gap with the outer bearing ring in Come in contact.
- the labyrinth gap Similarly designed is another embodiment of the labyrinth gap, starting from the free space between the sealing disc and the sealing ring initially approximately radially between a bent leg on the sealing washer and the sealing ring and then extends approximately axially outwardly between the end of the cranked leg on the sealing washer and an axially outwardly projecting lip on the sealing ring.
- the axially outwardly projecting lip on the sealing ring can be made shorter, without thereby affecting the sealing effect in the labyrinth gap.
- the labyrinth gap and the interaction of the second sealing lip with the axially bent rim of the sealing disc are not influenced by any axial play in the roller bearing.
- a second labyrinth gap starting from the undercut between an axial projection on the first lip of the sealing ring and an axially projecting into the region of the undercut Projection of the board of the sealing washer initially approximately axially inwardly extending, then approximately radially formed between the end of the supernatant of the board and the sealing lip and finally extending axially outwardly between the board and the Dichtlippenfuß in the direction of the sealing edge on the second sealing lip, so that together with the first labyrinth gap, a safe labyrinth system for sealing the rolling bearing is created.
- the sealing disc is preferably made of a corrosion-resistant material, such as a hard plastic or stainless steel.
- the sealing However, only at least on the outside can the pane be corrosion-resistant, for example galvanized or coated with an elastomer.
- the seal according to the invention can be used for example for a rolling bearing, which is provided in a tensioning roller or a deflection roller of a traction mechanism drive.
- FIG. 1 shows an axial partial sectional view of a rolling bearing with the seal according to the invention according to a first embodiment
- Fig. 2 shows a second embodiment of the seal assembly on the rolling bearing
- Fig. 3 shows a third variant of the seal assembly.
- FIG. 1 the structure of a first embodiment of the seal 1 according to the invention for a rolling bearing 2 is shown.
- the seal 1 comprises a sealing ring 3 which, on an outer circumference, elastically fits into an annular groove 4 of an outer ring.
- ßeren, encircling Lagerhngs 5 is positionally fixed in position.
- the circumferential with the bearing ring 5 sealing ring 3 encloses a circular installation space 6 of the rolling bearing 2, in which in a rolling element cage 7 guided rolling elements 8 are inserted, which are guided in raceways of the outer bearing ring 5 and an inner bearing ring 9.
- the sealing disc 3 made of an elastic sealing material is provided for stiffening with a reinforcement 10, which is designed like a disk.
- the reinforcement 10 forms a right angle bevelled board 11.
- the reinforcement 10 has an inwardly inclined leg 12.
- At the reinforcement 10 of the sealing material of the sealing disc 3 is molded, which surrounds the board 11 and the leg 12 partially.
- a formed from the sealing material Dichtlippenfuß 13 connects.
- the Dichtlippenfuß 13 forms the basis for two sealing lips 14 and 15, of which the first sealing lip 14 protrudes into a, introduced into the inner bearing ring 9 undercut 16 without touching it.
- This first sealing lip 14 is due to their geometry and mass and shape substantially dimensionally stable, so that they at most slightly deformed due to the centrifugal force in rotating rolling bearing 2, without coming into contact with the walls of the undercut 16.
- the second sealing lip 15 extends approximately horizontally and axially in the direction of a sealing disc 19 and cooperates with its radially inwardly directed sealing edge 17 with a cylindrical inner surface 30 of an approximately right-angled Bordes 20 on the sealing disc 19 together.
- the sealing lip 15 is flexible against the occurring centrifugal forces, since the transition to the Dichtlippenfuß 13 has a relatively small cross-section and in this area in addition a groove 32 which is directed towards the Dichtlippenfuß 13 is formed.
- a labyrinth gap 23 is formed, which is narrow and angular enough that virtually no moisture and particles can get into the free space 24 between the sealing ring 3 and the sealing disk 19, but which is far enough to allow moisture or condensate to flow out when the rolling bearing 2 is stationary due to gravity and particles are thrown off, Moisture and condensate during rotation of the rolling bearing 2 to allow.
- the second sealing lip 15 rests with its sealing edge 17 against the cylindrical inner surface 30 of the rim 20 and seals the undercut 16 and the interior of the rolling bearing 2 safely. If the roller bearing 2 is rotated, the sealing ring 3 rotates with the outer bearing ring 5, so that the sealing edge 17 of the second sealing lip 15 lifts from the cylindrical inner surface 30 of the rim 20 due to the centrifugal force and no or only one in this operating state very low friction between the sealing ring 3 and the sealing washer 19 is given. Due to the arrangement of the first sealing lip 14 in the undercut 16, the substantially horizontal and axially extending second sealing lip 15 and the formation of the labyrinth gap 23, there are no or only extremely small effects of axial play in the rolling bearing 2 on the sealing effect.
- An additional seal with a lubricant reserve can be given by filling the undercut 16 with lubricating grease.
- the embodiment of FIG. 2 is basically similar in structure and in the operation comparable to the embodiment of FIG. 1.
- Der 1 is that a second labyrinth gap 28 between an axial projection 27 on the first lip 26 of the sealing ring 3, a projection 31 on the board 20 of the sealing washer 19, which projects into the region of the undercut 16, and the second sealing lip 15 is provided, the sealing edge 17 in this case, the cylindrical inner surface 30 of the rim 20 also does not touch when the rolling bearing 2.
- the first labyrinth gap 23 is formed between one end of the radially outer limb 21 of the sealing disc 19 and an axial lip 25 on the sealing ring 3, so that the annular groove 4 of the outer bearing ring 5 serves exclusively for fixing the position of the sealing ring 3.
- FIG. 3 agrees with respect to the formation and effect of the first and second sealing lip 14, 15 with the embodiment of FIG. 1, while the sealing disc 19 as shown in FIG. 3 has an axially inwardly cranked leg 29, which together with the axial lip 25 on the sealing ring 3, the labyrinth gap 23 limited.
- an improved mechanical protection of the sealing ring 3 is given by the sealing washer 19 and the outflow of moisture and condensate in the free space 24 between the sealing disc 19 and the sealing ring 3 moisture and condensate at standstill of the rolling bearing 2 and a radial centrifuging of particles, moisture and Ensures condensate in rotating rolling bearing 2 without particles, moisture and / or condensate can get into the interior of the rolling bearing 2.
- the rolling bearing 2 with its seal 3, 19 is preferably used in a tensioning roller or a deflection roller of a clamping system, with which a traction means of a traction mechanism is biased, wherein the structure of the tensioning roller or pulley comprises a rolling bearing enclosing the running disk, which at the same time the function of the outer , circumferential bearing ring takes over.
- This use is described in DE 10 2006 025 580 A1, the content of which is completely made the subject of the disclosure.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009009633A DE102009009633A1 (de) | 2009-02-19 | 2009-02-19 | Abdichtung für ein Wälzlager |
| PCT/EP2009/066972 WO2010094361A1 (de) | 2009-02-19 | 2009-12-11 | Abdichtung für ein wälzlager |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2399040A1 true EP2399040A1 (de) | 2011-12-28 |
Family
ID=42212217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09799312A Withdrawn EP2399040A1 (de) | 2009-02-19 | 2009-12-11 | Abdichtung für ein wälzlager |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2399040A1 (de) |
| DE (1) | DE102009009633A1 (de) |
| WO (1) | WO2010094361A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3018321B1 (fr) * | 2014-03-05 | 2016-12-09 | Ntn Snr Roulements | Palier a roulement equipe d’un dispositif d’etancheite comprenant une armature |
| JP6439262B2 (ja) * | 2014-03-19 | 2018-12-19 | 日本精工株式会社 | 転がり軸受 |
| US10082179B2 (en) | 2014-12-16 | 2018-09-25 | Roller Bearing Company Of America, Inc. | Seal for self aligning roller bearing |
| FR3035931B1 (fr) * | 2015-05-04 | 2017-04-28 | Skf Ab | Palier comprenant un flasque d'etancheite |
| JP6582566B2 (ja) | 2015-06-03 | 2019-10-02 | 株式会社ジェイテクト | 転がり軸受 |
| JP6957836B2 (ja) | 2016-01-26 | 2021-11-02 | 株式会社ジェイテクト | 転がり軸受 |
| JP6874455B2 (ja) * | 2017-03-22 | 2021-05-19 | 株式会社ジェイテクト | 転がり軸受 |
| JP6946697B2 (ja) | 2017-03-31 | 2021-10-06 | 株式会社ジェイテクト | 転がり軸受 |
| JP6950430B2 (ja) | 2017-10-04 | 2021-10-13 | 株式会社ジェイテクト | 玉軸受 |
| DE102018114677A1 (de) * | 2018-06-19 | 2019-12-19 | Schaeffler Technologies AG & Co. KG | Wälzlager und Dichtungsanordnung mit mindestens zwei Dichtlippen |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0942300A (ja) * | 1995-08-01 | 1997-02-10 | Koyo Seiko Co Ltd | 密封装置 |
| DE10083061T1 (de) * | 1999-09-10 | 2002-03-28 | Nsk Ltd | Abgedichtetes Wälzlager |
| JP4296465B2 (ja) * | 2002-03-11 | 2009-07-15 | 東洋シール工業株式会社 | 軸受密封装置 |
| DE10336341A1 (de) | 2003-08-08 | 2005-03-10 | Ina Schaeffler Kg | Abdichtung für ein Wälzlager |
| DE102006025580A1 (de) | 2006-06-01 | 2007-12-06 | Schaeffler Kg | Wälzlager |
-
2009
- 2009-02-19 DE DE102009009633A patent/DE102009009633A1/de not_active Withdrawn
- 2009-12-11 EP EP09799312A patent/EP2399040A1/de not_active Withdrawn
- 2009-12-11 WO PCT/EP2009/066972 patent/WO2010094361A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010094361A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010094361A1 (de) | 2010-08-26 |
| DE102009009633A1 (de) | 2010-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 20110919 |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20160701 |
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| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230522 |