JP2004052924A - Sealing for rolling bearing - Google Patents

Sealing for rolling bearing Download PDF

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Publication number
JP2004052924A
JP2004052924A JP2002212206A JP2002212206A JP2004052924A JP 2004052924 A JP2004052924 A JP 2004052924A JP 2002212206 A JP2002212206 A JP 2002212206A JP 2002212206 A JP2002212206 A JP 2002212206A JP 2004052924 A JP2004052924 A JP 2004052924A
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Japan
Prior art keywords
rolling bearing
sealing device
sealing
opening
ring member
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JP2002212206A
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Japanese (ja)
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JP4240197B2 (en
Inventor
Kazuya Fujimoto
藤本　和也
Masahide Sunakawa
砂川　雅英
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Koyo Seiko Co Ltd
Koyo Sealing Techno Co Ltd
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Koyo Seiko Co Ltd
Koyo Sealing Techno Co Ltd
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Priority to JP2002212206A priority Critical patent/JP4240197B2/en
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    • 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
    • F16C33/726—Sealings with means to vent the interior of the bearing
    • 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
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/388—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with four rows, i.e. four row tapered roller 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that cooling water intrudes into a bearing inside with air to lead shortening life of bearing in a valve member attached to a sealing of a bearing for roll neck since the same has a structure opening and closing according to pressure difference between inside and outside of bearing and an operation of attaching such a valve member is difficult. <P>SOLUTION: A main body 33 of a valve mechanism 22 is inserted in an opening part 20 of a seal member 19 having a roll in part 32 rolled in a periphery surface of a hole in a swelling part 27 of a core metal 24, and a flange 34 is pushed in to get into contact with a fixing part 28 of an elastic seal body 25. A locking projection part 36 located in a middle position of the main body 33 engages with a middle of the roll in part 32 to be embedded therein and a locking projection piece 36 located on a tip position of the main body 33 is locked at an end surface of the opening 20. Since a valve mechanism 22 can pass air and cut off water and oil by a valve element 21 for adjusting pressure of inside and outside of an rolling bearing, flow out of lubricant in the rolling bearing is prevented and life of the rolling bearing can be extended. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば圧延機に設けられるロールのロールネック部等を回転自在に支持するための転がり軸受用密封装置に関する。
【０００２】
【従来の技術】
一般に、圧延機に付設されるロールネック用転がり軸受装置は、多列の円すいころ軸受を有する。これら多列の円すいころ軸受内には、組立て時にグリースが封入され、ロールネック用軸受装置の両端部には、グリースが外部に漏れるのを防止するシール部材を配置している。
【０００３】
ところで一般に、圧延機は、作業工程上加減速パターン運転が行われる。そして、圧延機の加減速パターン運転や、ロールネック用軸受装置の内外での温度差の発生により、ロールネック用軸受装置の内部が負圧になり、これに伴なって冷却水がロールネック用軸受装置の内部に侵入することがある。
【０００４】
そこで、ロールネック用軸受装置の内外の圧力差に対応するために、シール部材に通気孔を設け、この通気孔部分にロールネック用軸受装置の内外の圧力差に応じて開閉するベント穴や弁部材を設けている。
【０００５】
【発明が解決しようとする課題】
上記ロールネック用軸受装置では、密封装置（シール部材）に付設される弁部材を通気孔部分に取付ける作業が必要であった。さらにロールネック用軸受装置の内外の圧力差に応じて開閉するだけの弁部材では、ロールネック用軸受装置の内部に空気が流入するのといっしょに冷却水が侵入することがあり、この場合、ロールネック用軸受装置の寿命低下が懸念される。
【０００６】
【課題を解決するための手段】
本発明の転がり軸受用密封装置は、外輪部材と、前記外輪部材の径方向内方に同心に配置される内輪部材と、前記外輪部材および内輪部材の間に転動自在に配置される転動体とを含む転がり軸受における前記外輪部材と内輪部材との間の環状空間を密封して、前記環状空間内の潤滑剤が前記転がり軸受の外部に漏れるのを防止するためのシール部材を含み、前記シール部材は、芯金と前記芯金に一体形成される弾性シール体とを含み、前記シール部材における径方向途中部位に開口が形成され、前記開口の周壁部に巻込むように延長された弾性シール部材部分に、前記転がり軸受の内部と外部との圧力調整をするための弁体を有する弁機構が嵌着されている。
【０００７】
上記構成の転がり軸受用密封装置において、密封装置は、シール部材の開口に弁機構を取付けると、シール部材の開口周壁部に係止片が係合して、弁機構がシール部材に対して強固に固定される。
【０００８】
転がり軸受内部と外部との圧力調整をするための弁体として、例えば空気を通過可能で水分および油分を遮断可能な材質を用いることにより、転がり軸受内部と外部とで圧力差が発生した場合であっても、水分が転がり軸受内部に侵入するの防止するので、転がり軸受の所定の寿命を確保することができる。
【０００９】
また上記転がり軸受用密封装置において、前記弁機構の外周部に、前記開口の周壁部に巻込むように延長された弾性シール部材部分の軸方向内方側端面および軸方向途中位置に係止する複数個の係止片が設けられている。
【００１０】
この構成によれば、簡単な取付け動作でもって、シール部材の開口周壁部に係止片が係止し、より確実に弁機構がシール部材に対して強固に固定される。
【００１１】
また本発明の転がり軸受用密封装置は、転がり軸受内部と外部との圧力調整をするための弁体として、空気を通過可能で水分および油分を遮断可能な材質を用いている。
【００１２】
これにより、転がり軸受内部と外部とで圧力差が発生した場合であっても、水分が転がり軸受内部に侵入するの防止するので、転がり軸受の所定の寿命を確保することができる。
【００１３】
【発明の実施の形態】
以下、本発明の実施形態に係る転がり軸受用密封装置を、ロールネック用転がり軸受装置に用いる密封装置を例に、図面を参照して説明する。図１は密封装置を含むロールネック用転がり軸受装置の全体構成を示す断面図、図２は図１における第一密封装置部分の拡大断面図、図３は図２における第一密封装置をさらに拡大した断面図、図４は図３における一部省略側面図、図５は図１における第二密封装置の拡大断面図、図６は図５における第二密封装置をさらに拡大した断面図である。
【００１４】
図において、１は圧延機のロールを示し、２はそのロールネックを示す。本発明の転がり軸受装置Ｂは、ハウジング３に非回転に内嵌されるとともに、軸心方向に並べられた外輪部材４，５，６を有する。これら外輪部材４，５，６は、軸心方向両側に配置された端部側の単列軌道を有する外輪部材４，６と、これら両外輪部材４，６の間に配置される複列軌道を有する外輪部材５とから構成される。転がり軸受装置Ｂは、各外輪部材４，５，６の径方向内方に軸心回りに回転自在に配置される軸心方向に一対の複列の内輪部材７，８を有する。図１の符号２ａは、内輪部材７，８とロールネック２との間に潤滑剤を供給するための油溝を示す。
【００１５】
外輪部材４，５，６と内輪部材７，８との間には、転動体としての４列の円すいころ９，１０，１１，１２が、外輪部材４，５，６の軌道面、内輪部材７，８の軌道面間に転動自在に配置されている。
【００１６】
一方側２列の円すいころ９，１０は、一方の内輪部材７を共通にして、それぞれこの一方の内輪部材７と一方の外輪部材４との間と、中央の外輪部材５の一方側との間に配置され、他方側２列の円すいころ１１，１２は、他方の内輪部材８を共通にして、それぞれこの他方の内輪部材８と他方の外輪部材６との間と、中央の外輪部材５の他方側との間に配置されている。各列の円すいころ９，１０，１１，１２は、それぞれ保持器１３によって円周方向等配位置に配置されている。
【００１７】
前記両側の外輪部材４，６と、中央の外輪部材５とは、軸心方向に所定長さを有する間座（符号省略）を介して配置され、この間座に、転がり軸受装置Ｂに対して潤滑剤を供給するための給脂管１４が取付けられている。
【００１８】
さらに転がり軸受装置Ｂは、外輪部材４，５，６と内輪部材７，８との間の環状空間１５の両側にそれぞれ配置される第一密封装置１８，１８を有する。
【００１９】
図２に示すように、各第一密封装置１８は、環状空間１５内の潤滑剤が外部に漏れるのを防止するためのシール部材１９と、このシール部材１９の径方向途中位置に配置された開口２０に取付けられて、軸受内部と外部との圧力調整をするための弁体２１を備えた弁機構２２とを有する。このような第一密封装置１８，１８は、外輪部材４，６の両側の端部にそれぞれ配置される径方向外側ホルダー２３，２３と、ホルダー２３，２３に対して系方向内側に配置された内輪部材７，８との間の空間に配置されている。
【００２０】
なお、他方側の第一密封装置１８は、一方側の第一密封装置１８と同様の構成で左右対称の構成となるため、図２では一方側の第一密封装置１８のみを表している。図２において、符号３１は、ホルダー２３の外周に形成された凹部２３ａに嵌着してハウジング３とホルダー２３との間をシールするためのＯリングを示す。
【００２１】
シール部材１９は、芯金２４と、この芯金２４に一体形成される弾性シール体２５と、内輪部材８の外周面に接触して弾性シール体２５に一体形成されているリップ部２９と、このリップ部２９を内輪部材８の外周面に向けて押圧するためのコイルばね３０とから構成される。
【００２２】
芯金２４は、ホルダー２３の内周面に組込まれるの環状の支持部２６と、この支持部２６の径方向内方部位で、軸心方向外側に膨出する環状の膨出部２７とから構成される。
【００２３】
弾性シール体２５は、芯金２４に一体的に形成され、芯金２４の膨出部２７の径方向外方部位に固着されるとともにホルダー２３の内周面に嵌合する環状の固定部２８に固着される。
【００２４】
図３に示すように、前記芯金２４の膨出部２７における側壁の円周方向所定箇所に側面視円形の孔２０ａが形成され、この孔２０ａの周面に巻込むように折曲形成された弾性シール体２５の巻込み部３２が形成され、この巻込み部３２を周壁とする開口２０が形成されている。
【００２５】
この開口２０に、転がり軸受内部と外部との圧力調整をするための前記弁体２１を有する合成樹脂または金属製の前記弁機構２２が嵌合されている。この弁機構２２は、円盤状の本体３３と、この本体３３の軸心方向外側に一体的に形成されて本体３３よりも大径のフランジ３４とを有する。
【００２６】
弁機構２２の中心部には、転がり軸受内部と外部とを通気するための通気孔３５が形成されている。本体３３の外周部先端位置および外周部途中位置には、開口２０周面に本体３３を嵌合させた際に、開口２０の軸方向内方端面および巻込み部３２の周面途中位置と係合する環状の係止凸片３６ａ，３６ｂが形成されている。
【００２７】
弁機構２２の本体３３には、通気孔３５より大径の座面３７が形成され、この座面３７に転がり軸受内部と外部との圧力調整をするための前記弁体２１が着座されている。この弁体２１は、空気が通過可能で、水分、油分を遮断可能な材質で膜状に形成される。この弁体２１は気体透過性、接着性、強靭性、耐候性などに優れる材質であり、例えば、ポリテトラフルオロエチレン（ＰＴＦＥ）材に特殊加工を施したゴアテックス（商品名）などが用いられる。この弁体２１は、本体３３の側面部を縮径して保持片３８を形成することにより、環状の抑え部材３９を介して本体３３に保持されている。
【００２８】
転がり軸受装置Ｂは、図５に示すように、内輪部材７，８間の当接面どうし部分の外周凹部４０に嵌合する第二密封装置４５を有する。この第二密封装置４５は、シール部材４６と、転がり軸受内部と外部との圧力調整をするための弁体４７を有する弁機構４８とから構成される。
【００２９】
シール部材４６は、断面Ｌ字形の環状の芯金４９と、内輪部材７，８との間の外周凹部４０底面に接触するラジアルリップ５０を有して芯金４９に一体的に設けられる環状の弾性シール体５１とから構成される。このシール部材４６には、その略中心位置に開口５２が形成されている。図６に示すように、芯金４９の中心位置に開口５２と連通する凹部５３が形成されている。
【００３０】
弁機構４８は、シール部材４６の周方向所定位置に配置される。この弁機構４８は、凹部５３の底面に装着されるフランジ部５４と、このフランジ部５４よりも小径の胴部５５とを有する。胴部５５は、芯金４９から弾性シールに亙るように、開口５２に挿通されている。
【００３１】
フランジ部５４に転がり軸受内部と外部との圧力調整をするための弁体４７が着座する座面５４ａが形成され、この弁体４７は、空気を通過可能で、水分、油分を遮断可能な材質が用いられる。これは、例えば上記と同様に、シート状に形成したゴアテックス（商品名）などであり、膜状に形状されている。
【００３２】
この弁体４７は、フランジ部５４の径方向外側面部を縮径して保持片５６を形成することにより、環状の抑え部材５７を介してフランジ部５４に保持されている。胴部５５の外周面には数条の溝５８が形成され、これらの溝５８に接着剤が充填されている。
【００３３】
上記構成の転がり軸受装置Ｂにおいて、第一密封装置１８における弁機構２２は、弁体２１を本体３３の座面３７に当て、弁体２１に抑え部材３９を重ねた状態で、本体３３の側面部相当部分を縮径して保持片３８を形成することにより、弁体２１を抑え部材３９を介して本体３３に保持する。
【００３４】
第一密封装置１８は、上記のようにして組立てた弁機構２２を、シール部材１９に対して組付けることで製作する。すなわち、芯金２４の膨出部２７における開口２０（巻込み部３２）に弁機構２２の本体３３を挿入するようにし、フランジ３４を弾性シール体２５の固定部２８に当接するまで押込む。
【００３５】
このようにすると、本体３３の途中位置にある係止凸片３６ｂが開口２０の途中に、巻込み部３２の弾性に抗して埋まるように係合し、本体３３の先端位置にある断面三角形の係止凸片３６ａが巻込み部３２の端面に係止する。
【００３６】
このように、第一密封装置１８は、弁機構２２をシール部材１９に挿入するという簡単な作業でもって弁機構２２が容易に抜けないようにシール部材１９装着することができる。さらに、弁機構２２の本体３３に形成した各係止凸片３６ａ，３６ｂがシール部材１９に係止して強固に取付けられるので、第一密封装置１８を厳しい条件下で使用したとしても、弁機構２２がシール部材１９から離脱したり、開口２０との間に隙間が発生したりするのを防止できる。
【００３７】
加えて、弁機構２２は転がり軸受内部と外部との圧力調整をするための弁体２１を備えているので、圧延機が作業工程上、加減速パターン運転を行い、転がり軸受の内外で温度差が発生した場合、この弁体２１を空気が通過し、転がり軸受の内外で圧力差が発生するのを防止できる。そして弁体２１は、空気を通過させ得るとともに、水分、油分は遮断するため、転がり軸受外部から冷却水が侵入するのを防止するとともに、転がり軸受内部の潤滑剤の侵出を防止し、これにより転がり軸受の寿命を延長し得る。
【００３８】
また、第二密封装置４５は、シール部材４６の開口５２に、胴部５５から弁機構４８を挿入し、そのフランジ部５４を凹部５３の底面に当てることにより組付ける。また、弁機構４８の胴部５５外周面に接着剤を塗布して溝５８に接着剤を充填させたり、凹部５３の径をフランジ部５４の径よりも大きく形成しておき、その隙間に、さらに接着剤を充填する。このようにすることにより第二密封装置４５におけるシール部材４６と弁機構４８とをさらに強固に固着することができる。
【００３９】
この第二密封装置４５も第一密封装置１８と同様に、弁機構４８をシール部材４６に挿入するといった簡単な作業でもって製作することができる。
【００４０】
そして、この第二密封装置４５においても第一密封装置１８の場合と同様に、転がり軸受の内外で、弁体４７を介して空気の遣り取りのみ行われるので、転がり軸受外部から冷却水が侵入するのを防止するとともに、転がり軸受内部の潤滑剤の侵出を防止する。
【００４１】
図７は、第一密封装置５９の他の実施形態を示す断面図である。なお、図２に示す実施形態とは、第一密封装置５９を除いて同様の形態であるので、図２と同一の符号を付してその説明を省略する。
【００４２】
図７に示した第一密封装置５９は、環状空間１５内の潤滑剤が外部に漏れるのを防止するための環状のシール部材６０と、このシール部材６０の径方向途中位置に形成された開口６１に取付けられて、軸受内部と外部との圧力調整をするための弁体６２を有する弁機構６３とを有する。
【００４３】
シール部材６０は、断面Ｌ字形の芯金６４と、この芯金６４に一体形成される弾性シール体６５とから構成される。
【００４４】
弾性シール体６５は、芯金６４に固着される固定部６６と、この固定部６６の径方向内方に一体的に形成されて内輪部材８の外周面に接触するリップ部６７と、このリップ部６７を内輪部材８の外周面に押圧するためのコイルばね６８とから構成される。このような第一密封装置５９は、両側の外輪部材４，６の端部にそれぞれに隣合うように配置されるホルダー２３に取付けられる。
【００４５】
前記芯金６４の側壁途中部分の円周方向所定箇所に孔７１が形成され、固定部６６の一部には、孔７１の周面に巻込むように折曲した巻込み部７２を形成して、これにより開口６１が形成されている。
【００４６】
この開口６１に、転がり軸受内部と外部との圧力調整をするための前記弁体６２を備えた金属製の弁機構６３が嵌合されている。この弁機構６３は筒状の本体７３と、この本体７３の軸心方向内側に一体的に形成されて本体７３よりも大径のフランジ７４とから構成されている。
【００４７】
弁機構６３の中心部には、転がり軸受内部と外部とを通気するための通気孔７５が形成されている。この通気孔７５の軸心方向外側を被覆するように、本体７３の途中まで前記弁体６２が設けられている。この弁体６２は、上記各実施形態と同様の材質で形成されている。
【００４８】
上記構成において、第一密封装置５９における弁機構６３は、弁体６２を弁機構６３における本体７３の通気孔７５を覆うようにして本体７３の途中まで被せて固定し、芯金６４の開口６１に弁機構６３の本体７３を、フランジ７４が弾性シール体６５に当接するまで挿入するようにして組付ける。
【００４９】
弁体６２とフランジ７４の間に接着剤７６を塗布することによって弁機構６３が開口６１にさらに強固に接着固定される。
【００５０】
このように、第一密封装置５９は、弁機構６３を開口６１に装着するといった簡単な作業でもって組立てることができる。また、転がり軸受の内外で温度差が発生した場合、弁体６２を空気が通過し、転がり軸受の内外で圧力差が発生するのを防止する。そして弁体６２は、空気を通過させ得るとともに、水分、油分は遮断するため、転がり軸受外部から冷却水が侵入するのを防止するとともに、転がり軸受内部の潤滑剤の侵出を防止し、これにより転がり軸受の寿命を延長し得る。
【００５１】
上記実施形態では、弁体２１，４７，６２としてポリテトラフルオロエチレン材に特殊加工を施したゴアテックス（商品名）を用いたが、これに限定されない。例えば、ポリテトラフルオロエチレン材に延伸加工を施して形成したポリテトラフルオロエチレンシートと、毛、繊維を圧縮して形成した不織布とを貼合わせたものを用いてもよい。この場合も空気を透過可能で水分は遮断するので、上記各実施形態と同様に、転がり軸受外部から冷却水が侵入するのを防止するとともに、転がり軸受内部の潤滑剤の侵出を防止し、これにより転がり軸受の寿命を延長し得る。
【００５２】
【発明の効果】
以上の説明から明らかな通り、本発明によれば、密封装置は、シール部材の開口に弁機構を取付けるといった簡単な作業でもって製造することができ、また、シール部材の開口周壁部の弾性シール体に係止片が係止し、弁機構がシール部材に対して容易かつ強固に固定され、かつ厳しい使用条件下であっても、弁機構はシール部材に対して長期的に保持される。
【図面の簡単な説明】
【図１】本発明の実施形態を示す転がり軸受装置の全体構成を示す断面図である。
【図２】同じく第一密封装置およびその周辺部分を示す断面図である。
【図３】同じく第一密封装置をさらに拡大した状態の断面図である。
【図４】同じく図３における一部省略側面図である。
【図５】同じく第二密封装置およびその周辺部分を示す断面図である。
【図６】同じく第二密封装置をさらに拡大した状態の断面図である。
【図７】他の実施形態を示す第一密封装置およびその周辺部分を示す断面図である。
【符号の説明】
１　　　　圧延機のロール
２　　　　ロールネック
４〜６　　外輪部材
７，８　　内輪部材
９〜１２　円すいころ
１８　　　第一密封装置
１９　　　シール部材
２１　　　弁体
２２　　　弁機構
２４　　　芯金
２５　　　弾性シール体
２７　　　膨出部
２８　　　固定部
２９　　　リップ部
３２　　　巻込み部
３３　　　本体
３４　　　フランジ
３５　　　通気孔
３６　　　係止凸片
Ｂ　　　　転がり軸受装置[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rolling bearing sealing device for rotatably supporting, for example, a roll neck portion of a roll provided in a rolling mill.
[0002]
[Prior art]
In general, a rolling bearing device for a roll neck attached to a rolling mill has a multi-row tapered roller bearing. Grease is sealed in these multi-row tapered roller bearings at the time of assembly, and seal members for preventing grease from leaking outside are arranged at both ends of the roll neck bearing device.
[0003]
In general, a rolling mill performs an acceleration / deceleration pattern operation in a work process. Then, due to the acceleration / deceleration pattern operation of the rolling mill and the occurrence of a temperature difference between the inside and outside of the roll neck bearing device, the inside of the roll neck bearing device becomes negative pressure. It may enter the inside of the bearing device.
[0004]
Therefore, in order to cope with the pressure difference between the inside and outside of the roll neck bearing device, a ventilation hole is provided in the sealing member, and a vent hole or a valve which opens and closes in accordance with the pressure difference between the inside and outside of the roll neck bearing device in this ventilation hole portion. A member is provided.
[0005]
[Problems to be solved by the invention]
In the above-mentioned roll neck bearing device, it was necessary to attach a valve member attached to a sealing device (seal member) to the vent hole. Further, in a valve member that opens and closes only in accordance with the pressure difference between the inside and outside of the roll neck bearing device, cooling water may enter the inside of the roll neck bearing device together with air, and in this case, There is a concern that the life of the roll neck bearing device may be shortened.
[0006]
[Means for Solving the Problems]
A sealing device for a rolling bearing according to the present invention includes an outer ring member, an inner ring member concentrically disposed radially inward of the outer ring member, and a rolling element rotatably disposed between the outer ring member and the inner ring member. A sealing member for sealing the annular space between the outer ring member and the inner ring member in the rolling bearing including, and preventing a lubricant in the annular space from leaking out of the rolling bearing; The sealing member includes a cored bar and an elastic sealing body integrally formed with the cored bar. An opening is formed at a radially intermediate portion of the sealing member, and the elastic member extends so as to be wound around the peripheral wall of the opening. A valve mechanism having a valve body for adjusting the pressure between the inside and the outside of the rolling bearing is fitted to the seal member.
[0007]
In the sealing device for a rolling bearing having the above configuration, when the valve mechanism is attached to the opening of the sealing member, the locking piece engages with the peripheral wall of the opening of the sealing member, and the valve mechanism is firmly attached to the sealing member. Fixed to.
[0008]
As a valve body for adjusting the pressure between the inside and outside of the rolling bearing, for example, by using a material that can pass air and block moisture and oil, when a pressure difference occurs between the inside and outside of the rolling bearing. Even if it does, water is prevented from entering the inside of the rolling bearing, so that a predetermined life of the rolling bearing can be secured.
[0009]
In the sealing device for a rolling bearing, the elastic seal member portion extended to be wound around the peripheral wall portion of the opening is engaged with the outer peripheral portion of the valve mechanism at an axially inward end face and an intermediate position in the axial direction. A plurality of locking pieces are provided.
[0010]
According to this configuration, the locking piece is locked to the peripheral wall of the opening of the seal member by a simple mounting operation, and the valve mechanism is more securely fixed to the seal member more reliably.
[0011]
Further, the sealing device for a rolling bearing of the present invention uses a material capable of passing air and blocking moisture and oil as a valve body for adjusting the pressure between the inside and the outside of the rolling bearing.
[0012]
Thus, even if a pressure difference occurs between the inside and outside of the rolling bearing, moisture is prevented from entering the inside of the rolling bearing, and a predetermined life of the rolling bearing can be secured.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a sealing device for a rolling bearing according to an embodiment of the present invention will be described with reference to the drawings, taking a sealing device used for a rolling bearing device for a roll neck as an example. 1 is a cross-sectional view showing the entire configuration of a rolling bearing device for a roll neck including a sealing device, FIG. 2 is an enlarged cross-sectional view of a first sealing device portion in FIG. 1, and FIG. 3 is a further enlarged view of the first sealing device in FIG. 4, FIG. 4 is a partially omitted side view in FIG. 3, FIG. 5 is an enlarged sectional view of the second sealing device in FIG. 1, and FIG. 6 is a further enlarged sectional view of the second sealing device in FIG.
[0014]
In the drawing, 1 indicates a roll of a rolling mill, and 2 indicates a roll neck thereof. The rolling bearing device B of the present invention includes outer ring members 4, 5, and 6, which are non-rotatably fitted in the housing 3 and are arranged in the axial direction. The outer race members 4, 5, and 6 are composed of outer race members 4, 6 having end-side single-row races disposed on both sides in the axial direction, and double-row races disposed between the outer race members 4, 6. And an outer ring member 5 having the following. The rolling bearing device B has a pair of double-row inner ring members 7 and 8 arranged in the axial direction so as to be rotatable around the axis radially inward of the outer ring members 4, 5 and 6. Reference numeral 2a in FIG. 1 indicates an oil groove for supplying a lubricant between the inner ring members 7, 8 and the roll neck 2.
[0015]
Between the outer ring members 4, 5, 6 and the inner ring members 7, 8, there are four rows of tapered rollers 9, 10, 11, 12 as rolling elements, the raceway surfaces of the outer ring members 4, 5, 6 and the inner ring member. Rollers 7 and 8 are arranged so as to roll freely.
[0016]
The two rows of tapered rollers 9, 10 share one inner ring member 7, respectively, between one inner ring member 7 and one outer ring member 4 and one side of a central outer ring member 5. The other two rows of tapered rollers 11 and 12 share the other inner ring member 8, respectively, between the other inner ring member 8 and the other outer ring member 6, and the center outer ring member 5. Is arranged between the other side. The tapered rollers 9, 10, 11, and 12 in each row are arranged at equal positions in the circumferential direction by the cage 13.
[0017]
The outer race members 4 and 6 on both sides and the outer race member 5 at the center are arranged via spacers (not shown) having a predetermined length in the axial direction. A greasing pipe 14 for supplying a lubricant is attached.
[0018]
Furthermore, the rolling bearing device B has first sealing devices 18 and 18 disposed on both sides of the annular space 15 between the outer ring members 4, 5 and 6 and the inner ring members 7 and 8, respectively.
[0019]
As shown in FIG. 2, each of the first sealing devices 18 is provided with a seal member 19 for preventing the lubricant in the annular space 15 from leaking to the outside and a radially intermediate position of the seal member 19. And a valve mechanism 22 provided with a valve body 21 for adjusting the pressure between the inside and the outside of the bearing. Such first sealing devices 18, 18 are disposed radially outside holders 23, 23 disposed at both ends of the outer ring members 4, 6, respectively, and disposed inside the system direction with respect to the holders 23, 23. It is arranged in a space between the inner ring members 7 and 8.
[0020]
The first sealing device 18 on the other side has the same configuration as the first sealing device 18 on the one side and has a symmetrical configuration. Therefore, FIG. 2 shows only the first sealing device 18 on the one side. In FIG. 2, reference numeral 31 denotes an O-ring that fits into a recess 23 a formed on the outer periphery of the holder 23 to seal between the housing 3 and the holder 23.
[0021]
The seal member 19 includes a core 24, an elastic seal 25 formed integrally with the core 24, and a lip 29 formed integrally with the elastic seal 25 in contact with the outer peripheral surface of the inner ring member 8. A coil spring 30 for pressing the lip portion 29 toward the outer peripheral surface of the inner ring member 8 is provided.
[0022]
The metal core 24 is formed by an annular support portion 26 incorporated on the inner peripheral surface of the holder 23 and an annular bulge portion 27 bulging outward in the axial direction at a radially inner portion of the support portion 26. Be composed.
[0023]
The elastic seal body 25 is formed integrally with the core 24, is fixed to a radially outer portion of the bulging portion 27 of the core 24, and is fitted to an inner peripheral surface of the holder 23. To be fixed.
[0024]
As shown in FIG. 3, a circular hole 20a in a side view is formed at a predetermined position in a circumferential direction of a side wall of the bulging portion 27 of the metal core 24, and the hole 20a is bent so as to be wound around the peripheral surface of the hole 20a. A winding portion 32 of the elastic seal body 25 is formed, and an opening 20 having the winding portion 32 as a peripheral wall is formed.
[0025]
The valve mechanism 22 made of a synthetic resin or metal having the valve body 21 for adjusting the pressure between the inside and the outside of the rolling bearing is fitted into the opening 20. The valve mechanism 22 has a disk-shaped main body 33 and a flange 34 formed integrally outside the main body 33 in the axial direction and having a larger diameter than the main body 33.
[0026]
A vent hole 35 for ventilating the inside and outside of the rolling bearing is formed in the center of the valve mechanism 22. When the main body 33 is fitted to the peripheral surface of the opening 20, the axially inner end surface of the opening 20 and the midpoint of the peripheral surface of the winding portion 32 are located at the distal end position and the intermediate position of the outer periphery of the main body 33. A pair of annular locking projections 36a and 36b are formed.
[0027]
The body 33 of the valve mechanism 22 is formed with a seating surface 37 having a larger diameter than the ventilation hole 35, and the valve body 21 for adjusting the pressure between the inside and the outside of the rolling bearing is seated on the seating surface 37. . The valve body 21 is formed in a film shape from a material through which air can pass and which can block moisture and oil. The valve body 21 is a material excellent in gas permeability, adhesiveness, toughness, weather resistance, and the like. For example, Gore-Tex (trade name) obtained by specially processing a polytetrafluoroethylene (PTFE) material is used. . The valve body 21 is held by the main body 33 via an annular suppressing member 39 by forming a holding piece 38 by reducing the diameter of the side surface of the main body 33.
[0028]
As shown in FIG. 5, the rolling bearing device B has a second sealing device 45 that fits into the outer peripheral concave portion 40 between the contact surfaces between the inner ring members 7 and 8. The second sealing device 45 includes a seal member 46 and a valve mechanism 48 having a valve body 47 for adjusting the pressure between the inside and the outside of the rolling bearing.
[0029]
The sealing member 46 has an annular core 49 having an L-shaped cross section and a radial lip 50 that contacts the bottom surface of the outer peripheral recess 40 between the inner ring members 7 and 8, and is provided integrally with the core 49. And an elastic seal body 51. The seal member 46 has an opening 52 at a substantially central position thereof. As shown in FIG. 6, a concave portion 53 communicating with the opening 52 is formed at the center position of the cored bar 49.
[0030]
The valve mechanism 48 is arranged at a predetermined position in the circumferential direction of the seal member 46. The valve mechanism 48 has a flange portion 54 mounted on the bottom surface of the concave portion 53 and a body portion 55 having a smaller diameter than the flange portion 54. The body portion 55 is inserted through the opening 52 so as to extend from the metal core 49 to the elastic seal.
[0031]
A seat surface 54a on which a valve body 47 for adjusting the pressure between the inside and the outside of the rolling bearing is seated is formed on the flange portion 54. The valve body 47 is made of a material that can pass air and can block moisture and oil. Is used. This is, for example, Gore-Tex (trade name) formed in a sheet shape, as described above, and is formed in a film shape.
[0032]
The valve body 47 is held by the flange portion 54 via an annular suppressing member 57 by forming a holding piece 56 by reducing the diameter of the outer surface in the radial direction of the flange portion 54. Several grooves 58 are formed on the outer peripheral surface of the body portion 55, and these grooves 58 are filled with an adhesive.
[0033]
In the rolling bearing device B having the above-described configuration, the valve mechanism 22 of the first sealing device 18 is configured such that the valve body 21 is brought into contact with the seating surface 37 of the main body 33 and the holding member 39 is superimposed on the valve body 21. By forming the holding piece 38 by reducing the diameter of the portion corresponding to the portion, the valve body 21 is held on the main body 33 via the holding member 39.
[0034]
The first sealing device 18 is manufactured by assembling the valve mechanism 22 assembled as described above with respect to the sealing member 19. That is, the main body 33 of the valve mechanism 22 is inserted into the opening 20 (the winding part 32) of the bulging part 27 of the core metal 24, and the flange 34 is pushed until it comes into contact with the fixing part 28 of the elastic seal body 25.
[0035]
In this way, the locking convex piece 36b at an intermediate position of the main body 33 is engaged in the middle of the opening 20 so as to be buried against the elasticity of the winding portion 32, and the triangular cross-section at the distal end position of the main body 33 is formed. Is locked to the end face of the winding portion 32.
[0036]
As described above, the first sealing device 18 can be mounted on the seal member 19 so that the valve mechanism 22 is not easily removed by the simple operation of inserting the valve mechanism 22 into the seal member 19. Further, since the locking projections 36a and 36b formed on the main body 33 of the valve mechanism 22 are locked to the sealing member 19 and are firmly attached, even if the first sealing device 18 is used under severe conditions, the valve is not used. It is possible to prevent the mechanism 22 from being detached from the seal member 19 and from forming a gap between the mechanism 22 and the opening 20.
[0037]
In addition, since the valve mechanism 22 is provided with the valve element 21 for adjusting the pressure between the inside and the outside of the rolling bearing, the rolling mill performs an acceleration / deceleration pattern operation in the work process, and the temperature difference between the inside and outside of the rolling bearing. When airflow occurs, air passes through the valve element 21 to prevent a pressure difference between the inside and outside of the rolling bearing. The valve body 21 allows air to pass therethrough and shuts off moisture and oil, so that cooling water is prevented from entering from outside the rolling bearing, and lubricant from the inside of the rolling bearing is prevented from leaking out. Thus, the life of the rolling bearing can be extended.
[0038]
Further, the second sealing device 45 is assembled by inserting the valve mechanism 48 from the body portion 55 into the opening 52 of the seal member 46 and applying the flange portion 54 to the bottom surface of the concave portion 53. Further, an adhesive is applied to the outer peripheral surface of the body portion 55 of the valve mechanism 48 to fill the groove 58 with the adhesive, or the diameter of the concave portion 53 is formed to be larger than the diameter of the flange portion 54. Further, an adhesive is filled. By doing so, the sealing member 46 and the valve mechanism 48 in the second sealing device 45 can be more firmly fixed.
[0039]
Like the first sealing device 18, the second sealing device 45 can be manufactured by a simple operation such as inserting the valve mechanism 48 into the sealing member 46.
[0040]
In the second sealing device 45, as in the case of the first sealing device 18, only air is exchanged between the inside and outside of the rolling bearing via the valve body 47, so that cooling water enters from outside the rolling bearing. And prevents the lubricant from escaping from inside the rolling bearing.
[0041]
FIG. 7 is a sectional view showing another embodiment of the first sealing device 59. Since the embodiment shown in FIG. 2 is the same as the embodiment except for the first sealing device 59, the same reference numerals as those in FIG.
[0042]
The first sealing device 59 shown in FIG. 7 includes an annular seal member 60 for preventing the lubricant in the annular space 15 from leaking to the outside, and an opening formed at a radially intermediate position of the seal member 60. 61, a valve mechanism 63 having a valve body 62 for adjusting the pressure between the inside and the outside of the bearing.
[0043]
The seal member 60 includes a core metal 64 having an L-shaped cross section, and an elastic seal body 65 integrally formed with the core metal 64.
[0044]
The elastic seal body 65 includes a fixed portion 66 fixed to the metal core 64, a lip portion 67 integrally formed radially inward of the fixed portion 66 and in contact with the outer peripheral surface of the inner race member 8, And a coil spring 68 for pressing the portion 67 against the outer peripheral surface of the inner race member 8. Such a first sealing device 59 is attached to the holder 23 disposed adjacent to the ends of the outer ring members 4 and 6 on both sides, respectively.
[0045]
A hole 71 is formed at a predetermined position in the circumferential direction in the middle of the side wall of the cored bar 64, and a winding portion 72 bent to be wound around the peripheral surface of the hole 71 is formed in a part of the fixing portion 66. Thus, the opening 61 is formed.
[0046]
A metal valve mechanism 63 having the valve body 62 for adjusting the pressure between the inside and the outside of the rolling bearing is fitted into the opening 61. The valve mechanism 63 includes a cylindrical main body 73 and a flange 74 formed integrally with the main body 73 in the axial direction inside and having a larger diameter than the main body 73.
[0047]
A vent hole 75 for ventilating the inside and outside of the rolling bearing is formed in the center of the valve mechanism 63. The valve body 62 is provided halfway in the main body 73 so as to cover the outside of the ventilation hole 75 in the axial direction. The valve body 62 is formed of the same material as in each of the above embodiments.
[0048]
In the above configuration, the valve mechanism 63 in the first sealing device 59 covers and fixes the valve body 62 halfway through the main body 73 so as to cover the ventilation hole 75 of the main body 73 in the valve mechanism 63. The main body 73 of the valve mechanism 63 is inserted so that the flange 74 contacts the elastic seal body 65.
[0049]
By applying an adhesive 76 between the valve body 62 and the flange 74, the valve mechanism 63 is further firmly adhered and fixed to the opening 61.
[0050]
Thus, the first sealing device 59 can be assembled by a simple operation such as mounting the valve mechanism 63 in the opening 61. Further, when a temperature difference occurs between the inside and outside of the rolling bearing, air passes through the valve body 62 to prevent a pressure difference between inside and outside of the rolling bearing. The valve body 62 allows air to pass therethrough and shuts off moisture and oil, so that cooling water is prevented from entering from outside the rolling bearing, and lubricant from the inside of the rolling bearing is prevented from leaking out. Thus, the life of the rolling bearing can be extended.
[0051]
In the above embodiment, Gore-Tex (trade name) obtained by specially processing a polytetrafluoroethylene material is used as the valve bodies 21, 47, and 62, but the invention is not limited to this. For example, a sheet obtained by laminating a polytetrafluoroethylene sheet formed by stretching a polytetrafluoroethylene material and a nonwoven fabric formed by compressing hairs and fibers may be used. In this case, too, since air is permeable and moisture is shut off, as in the above embodiments, it is possible to prevent cooling water from intruding from the outside of the rolling bearing, and to prevent leaching of lubricant inside the rolling bearing, This can extend the life of the rolling bearing.
[0052]
【The invention's effect】
As is apparent from the above description, according to the present invention, the sealing device can be manufactured by a simple operation of attaching a valve mechanism to the opening of the sealing member, and the elastic sealing of the peripheral wall portion of the opening of the sealing member. The locking piece is locked to the body, the valve mechanism is easily and firmly fixed to the seal member, and the valve mechanism is retained for a long period of time even under severe use conditions.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an overall configuration of a rolling bearing device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a first sealing device and a peripheral portion thereof.
FIG. 3 is a sectional view of the first sealing device in a further enlarged state.
FIG. 4 is a partially omitted side view of FIG. 3;
FIG. 5 is a cross-sectional view showing a second sealing device and a peripheral portion thereof.
FIG. 6 is a sectional view of a state in which the second sealing device is further enlarged.
FIG. 7 is a cross-sectional view showing a first sealing device according to another embodiment and a peripheral portion thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roll of rolling mill 2 Roll neck 4-6 Outer ring member 7, 8 Inner ring member 9-12 Tapered roller 18 First sealing device 19 Sealing member 21 Valve element 22 Valve mechanism 24 Core metal 25 Elastic seal body 27 Swelling part 28 Fixed Part 29 lip part 32 winding part 33 main body 34 flange 35 vent hole 36 locking convex piece B rolling bearing device

Claims (3)

外輪部材と、前記外輪部材の径方向内方に同心に配置される内輪部材と、前記外輪部材および内輪部材の間に転動自在に配置される転動体とを含む転がり軸受における前記外輪部材と内輪部材との間の環状空間を密封して、前記環状空間内の潤滑剤が前記転がり軸受の外部に漏れるのを防止するためのシール部材を含む転がり軸受用密封装置であって、
前記シール部材は、芯金と前記芯金に一体形成される弾性シール体とを含み、前記シール部材における径方向途中部位に開口が形成され、前記開口の周壁部に巻込むように延長された弾性シール部材部分に、前記転がり軸受の内部と外部との圧力調整をするための弁体を有する弁機構が嵌着された、転がり軸受用密封装置。An outer ring member, an inner ring member concentrically disposed radially inward of the outer ring member, and an outer ring member in a rolling bearing including a rolling element rotatably disposed between the outer ring member and the inner ring member. A sealing device for a rolling bearing including a seal member for sealing an annular space between the inner ring member and a lubricant in the annular space to prevent the lubricant from leaking outside the rolling bearing,
The seal member includes a metal core and an elastic seal body integrally formed with the metal core, an opening is formed in a radially intermediate portion of the seal member, and is extended so as to be wound around the peripheral wall of the opening. A sealing device for a rolling bearing, wherein a valve mechanism having a valve body for adjusting the pressure between the inside and the outside of the rolling bearing is fitted to the elastic sealing member. 請求項１記載の転がり軸受用密封装置であって、
前記弁機構の外周部に、前記開口の周壁部に巻込むように延長された弾性シール部材部分の軸方向内方側端面および軸方向途中部位に係止する複数個の係止片が設けられた、転がり軸受用密封装置。The sealing device for a rolling bearing according to claim 1,
A plurality of locking pieces are provided on an outer peripheral portion of the valve mechanism, the plurality of locking pieces being locked on an axially inward end surface of an elastic seal member portion extended so as to be wound around a peripheral wall portion of the opening and an intermediate portion in the axial direction. Also, sealing devices for rolling bearings. 請求項１または請求項２記載の転がり軸受用密封装置であって、
前記弁体として、空気を通過可能で水分および油分を遮断可能な材質が用いられた、転がり軸受用密封装置。A sealing device for a rolling bearing according to claim 1 or 2,
A sealing device for a rolling bearing, wherein a material capable of passing air and blocking moisture and oil is used as the valve body.
JP2002212206A 2002-07-22 2002-07-22 SEALING DEVICE FOR ROLLING BEARING AND ROLLING BEARING DEVICE Expired - Fee Related JP4240197B2 (en)

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Cited By (8)

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JP2007298161A (en) * 2006-04-06 2007-11-15 Koyo Sealing Techno Co Ltd Venting device
JP2008101641A (en) * 2006-10-17 2008-05-01 Jtekt Corp Rolling bearing device
WO2008050755A1 (en) * 2006-10-24 2008-05-02 Jtekt Corporation Sealing device
JP2012219817A (en) * 2011-04-04 2012-11-12 Ntn Corp Roller bearing sealing device
CN105829748A (en) * 2013-12-20 2016-08-03 斯凯孚公司 Bearing arrangement
CN107191495A (en) * 2017-05-29 2017-09-22 苏州固特斯电子科技有限公司 A kind of bearing cap with chip discharging structure
CN109926450A (en) * 2018-07-20 2019-06-25 成都金中机械设备制造有限公司 A kind of three-high mill of water-oil separating
DE102022134659A1 (en) 2022-12-22 2024-06-27 ILJIN GmbH Sealing arrangement, method for producing a sealing arrangement and rolling bearing arrangement

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JP5602504B2 (en) * 2010-06-07 2014-10-08 Ｎｔｎ株式会社 Rolling bearing sealing device
JP2013029129A (en) * 2011-07-27 2013-02-07 Ntn Corp Sealed rolling bearing

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JP4747049B2 (en) * 2006-04-06 2011-08-10 光洋シーリングテクノ株式会社 Vent device
JP2007298161A (en) * 2006-04-06 2007-11-15 Koyo Sealing Techno Co Ltd Venting device
JP2008101641A (en) * 2006-10-17 2008-05-01 Jtekt Corp Rolling bearing device
EP2085628A4 (en) * 2006-10-24 2011-12-14 Jtekt Corp Sealing device
EP2085628A1 (en) * 2006-10-24 2009-08-05 JTEKT Corporation Sealing device
JP2008106825A (en) * 2006-10-24 2008-05-08 Jtekt Corp Sealing device
WO2008050755A1 (en) * 2006-10-24 2008-05-02 Jtekt Corporation Sealing device
JP2012219817A (en) * 2011-04-04 2012-11-12 Ntn Corp Roller bearing sealing device
CN105829748A (en) * 2013-12-20 2016-08-03 斯凯孚公司 Bearing arrangement
US10107337B2 (en) 2013-12-20 2018-10-23 Aktiebolaget Skf Bearing assembly
CN107191495A (en) * 2017-05-29 2017-09-22 苏州固特斯电子科技有限公司 A kind of bearing cap with chip discharging structure
CN109926450A (en) * 2018-07-20 2019-06-25 成都金中机械设备制造有限公司 A kind of three-high mill of water-oil separating
DE102022134659A1 (en) 2022-12-22 2024-06-27 ILJIN GmbH Sealing arrangement, method for producing a sealing arrangement and rolling bearing arrangement
WO2024133929A1 (en) 2022-12-22 2024-06-27 ILJIN GmbH Seal assembly, method for producing a seal assembly and rolling bearing assembly

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