JP2015021590A - Seal device for rolling bearing and rolling bearing - Google Patents
Seal device for rolling bearing and rolling bearing Download PDFInfo
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- JP2015021590A JP2015021590A JP2013151872A JP2013151872A JP2015021590A JP 2015021590 A JP2015021590 A JP 2015021590A JP 2013151872 A JP2013151872 A JP 2013151872A JP 2013151872 A JP2013151872 A JP 2013151872A JP 2015021590 A JP2015021590 A JP 2015021590A
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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
- F16C33/76—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
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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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
- F16C23/084—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface sliding on a complementary spherical surface
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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
- F16C33/76—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
- F16C33/7806—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 spherical roller bearings
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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
- F16C33/76—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
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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
- F16C33/76—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
- F16C33/7846—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 a gap between the annular disc and the inner race
- F16C33/785—Bearing shields made of sheet metal
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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
- F16C33/76—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
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
- F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
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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
- F16C33/76—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
- F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
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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
- 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
- F16C19/24—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 radial load mainly
- F16C19/26—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 radial load mainly with a single row of rollers
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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
- 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
- F16C19/24—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 radial load mainly
- F16C19/28—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 radial load mainly with two or more rows of rollers
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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
- 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
- F16C19/385—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 two rows, i.e. double-row tapered roller bearings
- F16C19/386—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 two rows, i.e. double-row tapered roller bearings in O-arrangement
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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
- 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
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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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
- F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
本発明は、転がり軸受用シール装置、及び転がり軸受に関する。 The present invention relates to a rolling bearing seal device and a rolling bearing.
鉄等の金属材料を圧延するための連続鋳造機のロールは、その軸方向両端部に同軸上に設けたロールネックと称される円柱部を、例えば複列円すいころ軸受を介して回転自在に支承した構造を有する。このような連続鋳造機設備用軸受は、通常、シールなしの非密封タイプであり、グリースが連続給脂機構により常に軸受に供給される。 A roll of a continuous casting machine for rolling a metal material such as iron can be freely rotated through a cylindrical portion called a roll neck provided coaxially at both axial end portions thereof, for example, via a double row tapered roller bearing. Has a supported structure. Such a bearing for a continuous casting machine is usually an unsealed type without a seal, and grease is always supplied to the bearing by a continuous greasing mechanism.
また、連続鋳造機設備用軸受としては、圧延水や冷却水が軸受内部に浸入することを防止するためにシール装置を具備している密封タイプもある。このようなシール装置としては、軸受の軸方向端部開口を遮蔽して、内輪及び外輪間の軸受内部空間をシールするシールリップ部を接触面に摺接させる接触シール構造からなるものが知られている(例えば、特許文献1参照)。特許文献1のシール装置では、シールリップ部の基端部位に金属環が埋設されており、当該金属環によって基端部位が補強されている。 Further, as a bearing for a continuous casting machine facility, there is a sealed type equipped with a sealing device to prevent rolling water and cooling water from entering the inside of the bearing. As such a seal device, there is known a device having a contact seal structure that shields a bearing lip portion that seals the bearing inner space between the inner ring and the outer ring and that contacts the contact surface by shielding the axial end opening of the bearing. (For example, refer to Patent Document 1). In the sealing device of Patent Document 1, a metal ring is embedded in the base end portion of the seal lip portion, and the base end portion is reinforced by the metal ring.
ところで、連続鋳造設備は、水蒸気や酸化スケールのある環境内に使用される為、グリースが水やスケールにより汚染されやすく、汚染されたグリースが軸受内部へ供給されると、軸受の摩耗・破損に繋がる。更に、連続給脂用のグリースは、一台の連続鋳造機にあたり年間およそ30〜70トンの使用量が必要とれるので、グリース廃棄物の量が膨大であり、環境汚染の虞があり、グリース廃棄物の処理も煩雑でコストがかかる。このように、グリースの使用量を減らし、環境負荷の少ない軸受の開発が課題となっている。 By the way, since the continuous casting equipment is used in an environment with water vapor and oxide scale, grease is likely to be contaminated by water and scale, and if contaminated grease is supplied into the bearing, the bearing may be worn or damaged. Connected. Furthermore, since grease for continuous lubrication requires a usage of approximately 30 to 70 tons per year per continuous casting machine, the amount of grease waste is enormous and there is a risk of environmental pollution. Processing of objects is also complicated and expensive. Thus, the development of bearings that reduce the amount of grease used and have a low environmental load is an issue.
そこで、特許文献1のように、シール装置を有する密封タイプの軸受を用いることも考えられるが、このシール装置では、軸の偏心や傾きが発生した場合、接触面との接触状態が変化し、強く当たる部分と弱く当たる部分とが発生する。そして、接触面と強く当接している部分では、破損が生じ易くなってしまう。一方、接触面と弱く当接している部分では、接触面とのしめしろが弱くなることで、軸受内部の潤滑剤が漏れ易くなると共に、外部から異物が浸入し易くなり、軸受の早期損傷を招く虞がある。 Therefore, it is conceivable to use a sealed bearing having a sealing device as in Patent Document 1, but in this sealing device, when the shaft is eccentric or inclined, the contact state with the contact surface changes, A portion that hits strongly and a portion that hits weakly occur. And in the part which is contact | abutting strongly with a contact surface, it will become easy to produce a damage. On the other hand, at the portion that is weakly in contact with the contact surface, the interference with the contact surface is weakened, so that the lubricant inside the bearing can easily leak and foreign matter can easily enter from the outside, causing early damage to the bearing. There is a risk of inviting.
本発明は、前述した課題に鑑みてなされたものであり、軸の偏心や傾きが発生した場合であっても、軸受の密封性を良好に維持可能な転がり軸受用シール装置、及び転がり軸受を提供することにある。 The present invention has been made in view of the above-described problems, and includes a rolling bearing seal device and a rolling bearing that can maintain good sealing performance of a bearing even when shaft eccentricity or inclination occurs. It is to provide.
本発明の上記目的は、下記の構成により達成される。
(1) 外方部材又は内方部材に固定される芯金と、前記芯金に固定される弾性体と、を備え、
前記芯金は、径方向に延びる第一芯金と、径方向に延びる第二芯金と、を有しており、
前記弾性体は、前記第一芯金と前記第二芯金とを接続する接続部と、前記第二芯金に固定され、内方部材又は外方部材に摺接するシールリップ部と、を有することを特徴とする転がり軸受用シール装置。
(2) 前記弾性体の接続部は、径方向断面が軸方向内側に傾斜する略直線形状、若しくは略曲線形状、又は略蛇腹形状であることを特徴とする(1)に記載の転がり軸受用シール装置。
(3) 前記弾性体は、前記第二芯金に固定されると共に前記シールリップ部よりも軸方向内側に位置し、前記内方部材又は前記外方部材との間で接触又は非接触のシールを形成する補助リップ部を有することを特徴とする(1)又は(2)に記載の転がり軸受用シール装置。
(4) (1)〜(3)の何れか1つに記載の転がり軸受用シール装置を備えることを特徴とする転がり軸受。
(5) 前記外方部材は、外輪、又は外輪及び該外輪の径方向外側に配置された球面座、又は外輪及び該外輪の軸方向外側に配置されたシールホルダであり、
前記内方部材は、内輪であることを特徴とする(1)〜(4)の何れか1つに記載の転がり軸受。
The above object of the present invention can be achieved by the following constitution.
(1) A metal core fixed to the outer member or the inner member, and an elastic body fixed to the metal core,
The metal core has a first metal core extending in the radial direction and a second metal core extending in the radial direction,
The elastic body includes a connection portion that connects the first core metal and the second core metal, and a seal lip portion that is fixed to the second core metal and that is in sliding contact with the inner member or the outer member. A rolling bearing sealing device characterized by that.
(2) The connecting portion of the elastic body has a substantially linear shape, a substantially curved shape, or a substantially bellows shape whose radial cross section is inclined inward in the axial direction, and for a rolling bearing according to (1) Sealing device.
(3) The elastic body is fixed to the second core metal and is positioned on the inner side in the axial direction than the seal lip portion, and is in contact with or not in contact with the inner member or the outer member. The rolling bearing sealing device according to (1) or (2), further comprising an auxiliary lip portion that forms
(4) A rolling bearing comprising the rolling bearing seal device according to any one of (1) to (3).
(5) The outer member is an outer ring, a spherical seat disposed on the outer side in the radial direction of the outer ring and the outer ring, or a seal holder disposed on the outer side in the axial direction of the outer ring and the outer ring,
The rolling bearing according to any one of (1) to (4), wherein the inner member is an inner ring.
本発明の転がり軸受用シール装置によれば、芯金は、径方向に延びる第一芯金と、径方向に延びる第二芯金と、を有しており、弾性体は、第一芯金と第二芯金とを接続する接続部と、第二芯金に固定され、内方部材又は外方部材に摺接するシールリップ部と、を有する。したがって、軸の偏心や傾きが発生した場合であっても、弾性体の接続部が軸の偏心や傾きに追従することによって、シールリップ部と内方部材又は外方部材との接触を維持することが可能である。また、シールリップ部は、第二芯金に固定されるので、内方部材又は外方部材とのしめしろ及び緊迫力を一定に保つことができ、良好なシール性能を発揮することが可能である。 According to the rolling bearing sealing device of the present invention, the core bar has the first core bar extending in the radial direction and the second core bar extending in the radial direction, and the elastic body is the first core bar. And a second metal core, and a seal lip portion fixed to the second metal core and in sliding contact with the inner member or the outer member. Therefore, even when the shaft is eccentric or inclined, the contact portion between the seal lip portion and the inner member or the outer member is maintained by the connecting portion of the elastic body following the eccentricity or inclination of the shaft. It is possible. Moreover, since the seal lip portion is fixed to the second cored bar, the interference with the inner member or the outer member and the tightening force can be kept constant, and good sealing performance can be exhibited. is there.
以下、本発明の一実施形態に係る転がり軸受用シール装置について、図面に基づいて詳細に説明する。 Hereinafter, a rolling bearing sealing device according to an embodiment of the present invention will be described in detail with reference to the drawings.
本実施形態に係る自動調心ころ軸受10は、図1に示すように、内周面に球面状の外輪軌道溝11aが形成された外方部材としての外輪11と、外周面に球面状の内輪軌道溝12aが二列形成された内方部材としての内輪12と、保持器13によって回動自在に保持され、外輪軌道溝11aと内輪軌道溝12aとの間に二列に整列して転動自在に配設された複数の転動体である樽形のころ14と、外輪11の内周面と内輪12の外周面との間に存在する空間の軸方向両端部開口を塞ぐようにそれぞれ配設され、軸受内部を密封する一対の転がり軸受用シール装置としてのオイルシール20と、を備える。
As shown in FIG. 1, the self-aligning roller bearing 10 according to the present embodiment includes an
外輪11の軸方向中間部には、外周面から内周面に貫通し、軸受空間に潤滑剤を供給可能且つ空気抜きが可能な貫通孔15が形成されている。なお、貫通孔15に雌ねじ部(不図示)を設け、当該雌ねじ部に軸受空間を密封するための栓を螺合してもよい。また、軸受空間内に潤滑剤が封入される構成である限り、貫通孔15を設けなくても構わない。ここで、軸受空間内に封入される潤滑剤は、粘度が40℃で300mm2/s〜500mm2/sである高粘度の潤滑油、又は動粘度が40℃で70mm2/s〜500mm2/sである基油とウレア化合物を増ちょう剤とする耐熱性及び耐摩耗性に優れたグリースが用いられる。
A through
図2も参照し、オイルシール20は、全体として略円環形状に形成されており、外輪11の内周面に固定される芯金30と、芯金30の軸方向外側面(軸方向において軸受の外側に向かう面を意味する。)に固定され、ゴム等の弾性材料から形成された弾性体40と、を有する。
Referring also to FIG. 2, the
芯金30は、外輪11の内周面の軸方向外側端部に形成された溝部11bに圧入されて固定され、径方向内側に延びる断面略L字形状(以降、断面とは径方向断面を意味する。)の第一芯金32と、第一芯金32の径方向内側端部32aよりも軸方向内側に配置され、径方向内側に延びる断面略直線形状の第二芯金34と、に分割されている。
The
弾性体40は、第一芯金32の軸方向外側面に固定される断面略L字形状の第一延出部41と、第二芯金34の軸方向外側面に固定される断面略直線形状の第二延出部42と、第一延出部41及び第二延出部42に連続すると共に、第一芯金32の径方向内側端部32a及び第二芯金34の径方向外側端部34aを接続する接続部43と、を有する。ここで、第一芯金32の径方向内側端部32aが、第二芯金34の径方向外側端部34aよりも径方向外側に位置しているので、弾性体40の接続部43は、軸方向内側に向かうにしたがって径方向内側に傾斜する断面略直線形状とされている。
The
また、弾性体40は、第二延出部42の径方向内側端部に接続されると共に、第二芯金34の径方向内側端部34bに軸方向に固定されるシールリップ部44を有する。シールリップ部44は、径方向内側端部44aが内輪12の外周面の軸方向外側端部に形成された溝部12bに弾性的に摺接して外輪11と内輪12との間をシールしている。なお、シールリップ部44を確実に内輪12の溝部12bに摺接させる必要があることから、シールリップ部44の外周面44bにスプリング50を装着し、そのスプリング50の弾性力によりシールリップ部44を内輪12の溝部12b側へ付勢するようにしている。
The
さらに、弾性体40は、第二芯金34の径方向内側端部34bから連続して軸方向外側に延びると共に、シールリップ部44よりも軸方向内側に位置するバンパーリップ部45を有する。バンパーリップ部45は、その径方向内側端部45aがシールリップ部44の径方向内側端部44aよりも径方向外側に位置するように形成されており、内輪12の溝部12bとの間で非接触のシールを形成する補助リップ部として働く。
Further, the
以上、説明したように本実施形態のオイルシール20によれば、芯金30は、外輪11の内周面に固定され径方向内側に延びる第一芯金32と、第一芯金32の径方向内側端部32aよりも軸方向内側に配置され径方向内側に延びる第二芯金34と、を有しており、弾性体40は、第一芯金32の径方向内側端部32aと第二芯金34の径方向外側端部34aとを接続する接続部43と、第二芯金34に固定され、その径方向内側端部44aが内輪の外周面に摺接するシールリップ部44と、を有する。したがって、軸の偏心や傾きが発生した場合であっても、弾性体40の接続部43が軸の偏心や傾きに追従することによって、シールリップ部44と内輪12の外周面との接触を維持することが可能である。また、シールリップ部44は、第二芯金34に固定されるので、内輪12の外周面とのしめしろ及び緊迫力を一定に保つことができ、良好なシール性能を発揮することが可能である。
As described above, according to the
また、第一芯金32の径方向内側端部32aが第二芯金34の径方向外側端部34aよりも径方向外側に位置し、弾性体40の接続部43が軸方向内側に向かうにしたがって径方向内側に傾斜する断面略直線形状であるので、軸の偏心や傾きが発生した場合、接続部43が曲がり易く、軸の偏心や傾きに対する追従性を高めることが可能である。
Further, the radially
なお、弾性体40の接続部43の形状は、図3に示すように、曲率を持った断面略曲線形状であってもよく、この場合、接続部43が図2の形状よりも曲がり易く、軸の偏心や傾きに対する追従性をより高めることが可能である。さらに、図4に示すように、表面に凹凸が形成された断面略蛇腹形状(ベローズ形状)であってもよく、この場合、接続部43が図3の形状よりもさらに曲がり易く、軸の偏心や傾きに対する追従性をさらに高めることが可能である。
As shown in FIG. 3, the shape of the connecting
また、弾性体40はバンパーリップ部45を有するので、軸の傾きや偏心が起こった場合であっても、当該バンパーリップ部45が内輪12の外周面と緩衝し、シールリップ部44の異常摩耗及び変形を防止することが可能である。
Further, since the
なお、本発明は、前述した各実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。 In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
例えば、オイルシール20の芯金30は、外輪11ではなく、内輪12に固定しても構わない。この場合、第一芯金32が内輪12に固定され、第二芯金34が外輪11に摺接する。
For example, the
また、オイルシール20が適用される転がり軸受としては、上述した自動調心ころ軸受10に限定されず、図5に示すような円筒ころ軸受や、図6に示すような複列円錐ころ軸受、図7に示すような球面座付き複列円錐ころ軸受、図8に示すような球面座付き円筒ころ軸受、不図示の球面座付き複列円筒ころ軸受であってもよい。図7及び図8には、球面座80の内周面に外輪11が配置された状態が示されている。この場合、外輪11及び当該外輪11の径方向外側に配置された球面座80が外方部材を構成する。
Further, the rolling bearing to which the
また、オイルシール20が適用される転がり軸受としては、図9に示すような球面座付き複列円錐ころ軸受や、図10に示すような球面座付き円筒ころ軸受であってもよい。これらの軸受では、内輪12の外周面と、外輪11の径方向外側に配置された球面座80の内周面と、の間に存在する空間の軸方向端部開口を塞ぐように、オイルシール20が形成されており、オイルシール20の芯金30が、球面座80の内周面の軸方向外側端部に形成された溝部80aに圧入されて固定される。
The rolling bearing to which the
また、オイルシール20が適用される転がり軸受としては、図11に示すような鉄鋼設備用四列円錐ころ軸受や、図12に示すような鉄鋼設備用四列円筒ころ軸受、図13に示すような鉄鋼設備用ニ列円錐ころ軸受等であってもよい。これらの軸受では、内輪12の外周面と、外輪11の軸方向両側に配置されたシールホルダ90の内周面と、の間に存在する空間の軸方向端部開口を塞ぐように、オイルシール20が形成されており、オイルシール20の芯金30が、シールホルダ90の内周面に圧入されて固定される。この場合、外輪11及び当該外輪11の軸方向外側に配置されたシールホルダ90が外方部材を構成する。
Moreover, as a rolling bearing to which the
また、上述の実施形態においては、補助リップ部としてバンパーリップ部45を設けるとしたが、外部からのダスト侵入を防止するダストリップ部としてもよい。また、補助リップ部は、必ずしも内輪12の外周面に接触する構成に限られず、内輪12の外周面との間でシールを形成する限り非接触であってもよい。また、補助リップ部を設けない構成としても構わない。
In the above-described embodiment, the
また、本発明の転がり軸受は、連続鋳造機設備用、鉄鋼設備用に限定されるものではなく、他の産業機械にも適用可能である。 Further, the rolling bearing of the present invention is not limited to use for continuous casting machine equipment and steel equipment, but can be applied to other industrial machines.
10 自動調心ころ軸受(転がり軸受)
11 外輪(外方部材)
11a 外輪軌道溝
11b 溝部
12 内輪(内方部材)
12a 内輪軌道溝
12b 溝部
13 保持器
14 ころ
15 貫通孔
20 転がり軸受用シール装置
30 芯金
32 第一芯金
32a 径方向内側端部
34 第二芯金
34a 径方向外側端部
34b 径方向内側端部
40 弾性体
41 第一延出部
42 第二延出部
43 接続部
44 シールリップ部
44a 径方向内側端部
44b 外周面
45 バンパーリップ部(補助リップ部)
45a 径方向内側端部
50 スプリング
80 球面座(外方部材)
80a 溝部
90 シールホルダ(外方部材)
10 Spherical roller bearings (rolling bearings)
11 Outer ring (outer member)
11a Outer
12a Inner
45a Radial
Claims (5)
前記芯金は、径方向に延びる第一芯金と、径方向に延びる第二芯金と、を有しており、
前記弾性体は、前記第一芯金と前記第二芯金とを接続する接続部と、前記第二芯金に固定され、内方部材又は外方部材に摺接するシールリップ部と、を有することを特徴とする転がり軸受用シール装置。 A core metal fixed to the outer member or the inner member, and an elastic body fixed to the core metal,
The metal core has a first metal core extending in the radial direction and a second metal core extending in the radial direction,
The elastic body includes a connection portion that connects the first core metal and the second core metal, and a seal lip portion that is fixed to the second core metal and that is in sliding contact with the inner member or the outer member. A rolling bearing sealing device characterized by that.
前記内方部材は、内輪であることを特徴とする請求項1〜4の何れか1項に記載の転がり軸受。 The outer member is an outer ring, or a spherical seat arranged on the outer side in the radial direction of the outer ring and the outer ring, or a seal holder arranged on the outer side in the axial direction of the outer ring and the outer ring,
The rolling bearing according to any one of claims 1 to 4, wherein the inner member is an inner ring.
Priority Applications (3)
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JP2013151872A JP2015021590A (en) | 2013-07-22 | 2013-07-22 | Seal device for rolling bearing and rolling bearing |
CN201420361324.3U CN203962701U (en) | 2013-07-22 | 2014-07-01 | Seal arrangement and rolling bearing for rolling bearing |
DE202014103365.3U DE202014103365U1 (en) | 2013-07-22 | 2014-07-22 | Roller bearing sealing device and roller bearing |
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JP2013151872A JP2015021590A (en) | 2013-07-22 | 2013-07-22 | Seal device for rolling bearing and rolling bearing |
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CN (1) | CN203962701U (en) |
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WO2021030025A1 (en) * | 2019-08-09 | 2021-02-18 | Amsted Rail Company, Inc. | Roller bearing seal case |
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EP3667110B1 (en) * | 2016-03-07 | 2021-07-07 | NSK Ltd. | Rolling bearing for a roller bearing unit for air turbine and air turbine handpiece for dental use |
FR3060678B1 (en) * | 2016-12-20 | 2019-12-20 | Ntn-Snr Roulements | ROLLING BEARING |
JP7365757B2 (en) * | 2017-01-23 | 2023-10-20 | ナブテスコ株式会社 | Seal structure of rotating machines and rotating machines |
WO2024199666A1 (en) * | 2023-03-31 | 2024-10-03 | Aktiebolaget Skf | An inner ring for a self-aligning roller bearing |
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JPS6340626U (en) * | 1986-09-01 | 1988-03-16 | ||
JPH0175626U (en) * | 1987-11-10 | 1989-05-23 | ||
JP2001059525A (en) * | 1999-08-19 | 2001-03-06 | Koyo Seiko Co Ltd | Self-aligning roller bearing for swing drive device |
JP2013060975A (en) * | 2011-09-12 | 2013-04-04 | Jtekt Corp | Sealing device and roller bearing device |
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JP2003227522A (en) | 2002-02-04 | 2003-08-15 | Ntn Corp | Sealing device of bearing |
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2014
- 2014-07-01 CN CN201420361324.3U patent/CN203962701U/en not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS6340626U (en) * | 1986-09-01 | 1988-03-16 | ||
JPH0175626U (en) * | 1987-11-10 | 1989-05-23 | ||
JP2001059525A (en) * | 1999-08-19 | 2001-03-06 | Koyo Seiko Co Ltd | Self-aligning roller bearing for swing drive device |
JP2013060975A (en) * | 2011-09-12 | 2013-04-04 | Jtekt Corp | Sealing device and roller bearing device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2021030025A1 (en) * | 2019-08-09 | 2021-02-18 | Amsted Rail Company, Inc. | Roller bearing seal case |
US11885376B2 (en) | 2019-08-09 | 2024-01-30 | Amsted Rail Company, Inc. | Roller bearing seal case |
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CN203962701U (en) | 2014-11-26 |
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