JP2014228053A - Self-aligning roller bearing - Google Patents

Self-aligning roller bearing Download PDF

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JP2014228053A
JP2014228053A JP2013107840A JP2013107840A JP2014228053A JP 2014228053 A JP2014228053 A JP 2014228053A JP 2013107840 A JP2013107840 A JP 2013107840A JP 2013107840 A JP2013107840 A JP 2013107840A JP 2014228053 A JP2014228053 A JP 2014228053A
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self
roller bearing
aligning roller
phosphate
film
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矢部　俊一
Shunichi Yabe
俊一 矢部
武信 稲葉
Takenobu Inaba
武信 稲葉
齋藤　剛
Takeshi Saito
剛 齋藤
佐藤　努
Tsutomu Sato
努 佐藤
巧哲 傅寳
Katsuaki Denpo
巧哲 傅寳
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NSK Ltd
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NSK Ltd
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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
    • 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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  • Support Of The Bearing (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a self-aligning roller bearing having a long life capable of satisfactorily sustaining even in high speed operation.SOLUTION: In a self-aligning roller bearing 1 including an inner race 2, an outer race 3, rollers 4, and a cage, an outer peripheral surface 3b of the outer race 3 has a solid lubrication film made from molybdenum disulfide via a phosphate film made from manganese phosphate. The total film thickness of the phosphate film and the solid lubrication film is 0.1 μm or more and 10 μm or less, and the surface roughness of the solid lubrication film is 0.01 μmRa or more and 1.0 μmRa or less.

Description

本発明は、自動調心ころ軸受に関する。   The present invention relates to a self-aligning roller bearing.

図４に示すように、エレベータ巻上げ機の主軸１０は一対の軸受１１，１２により支持されている、また、主軸１０の一端にはモータ２０が接続され、軸受１１，１２の間にはシーブ２５が設けられており、シーブ２５にはエレベータ籠の昇降に用いるロープが巻回されている。２つの軸受１１，１２は、ハウジング３０に対して僅かな隙間を持って配設されており、モータ２０に遠い側の軸受１１（「固定側軸受」ともいう）は、モータ２０と反対側に受け板があり、動くことができないが、モータ２０に近い側の軸受１２（「自由側軸受」ともいう）は若干動くことが可能である。そして、エレベータが作動すると、自由側軸受１２の外輪の外周面とハウジング３０との間に設けた隙間３５が機能し、両軸受１１，１２の温度が上昇した時に、自由側軸受１２が動いて主軸１０の温度上昇による伸びを吸収するように働く。また、軸受の形式としては、調心性が要求されるため、自動調心ころ軸受が一般的に用いられている（例えば、特許文献１参照）。   As shown in FIG. 4, the main shaft 10 of the elevator hoisting machine is supported by a pair of bearings 11, 12. A motor 20 is connected to one end of the main shaft 10, and a sheave 25 is interposed between the bearings 11, 12. A rope used for raising and lowering the elevator car is wound around the sheave 25. The two bearings 11, 12 are arranged with a slight gap with respect to the housing 30, and the bearing 11 on the side far from the motor 20 (also referred to as “fixed side bearing”) is on the opposite side of the motor 20. Although there is a backing plate and cannot move, the bearing 12 on the side close to the motor 20 (also referred to as “free-side bearing”) can move slightly. When the elevator is activated, the gap 35 provided between the outer peripheral surface of the outer ring of the free-side bearing 12 and the housing 30 functions, and the free-side bearing 12 moves when the temperature of both the bearings 11 and 12 rises. It works to absorb the elongation due to the temperature rise of the main shaft 10. Further, as the type of bearing, since self-alignment is required, a self-aligning roller bearing is generally used (see, for example, Patent Document 1).

特開２００８−３０８３１２号公報JP 2008-303081 A

近年では、建物の高層化に伴ってエレベータもより高速で運転されており、主軸１０を支持する軸受１１，１２に求められる要求性能も高くなってきている。特に、高速化に伴うユニット全体の温度上昇が続くことにより、徐々に自由側軸受１２の動きが悪くなり、主軸１０の温度上昇による伸びを吸収しづらくなることが想定されており、最悪の場合、固定側軸受１１に過大なアキシャル荷重が発生し、固定側軸受１１が損傷するおそれがある。   In recent years, elevators have been operated at higher speeds as the number of buildings rises, and the required performance required for the bearings 11 and 12 that support the main shaft 10 has increased. In particular, it is assumed that the increase in the temperature of the entire unit accompanying the increase in speed causes the movement of the free-side bearing 12 to gradually deteriorate, making it difficult to absorb the elongation due to the temperature increase of the main shaft 10. In addition, an excessive axial load is generated in the fixed side bearing 11, and the fixed side bearing 11 may be damaged.

そこで本発明は、高速運転にも十分に耐え得る長寿命の自動調心ころ軸受を提供することを目的とする。   Accordingly, an object of the present invention is to provide a long-life self-aligning roller bearing that can sufficiently withstand high-speed operation.

上記目的を達成するために本発明は、下記の自動調心ころ軸受を提供する。
（１）内輪、外輪、ころ及び保持器を備えた自動調心ころ軸受において、前記外輪の外周面に、リン酸塩被膜を介して固体潤滑被膜が形成されていることを特徴とする自動調心ころ軸受。
（２）前記リン酸塩被膜がリン酸マンガンからなることを特徴とする上記（１）記載の自動調心ころ軸受。
（３）前記固体潤滑被膜が二硫化モリブデンからなることを特徴とする上記（１）または（２）記載の自動調心ころ軸受。
（４）前記リン酸塩被膜と前記固体潤滑被膜との合計膜厚が０．１μｍ以上１０μｍ以下であることを特徴とする上記（１）〜（３）の何れか１項に記載の自動調心ころ軸受。
（５）前記固体潤滑被膜の表面粗さが０．０１μｍＲａ以上１．０μｍＲa以下であることを特徴とする上記（１）〜（４）の何れか１項に記載の自動調心ころ軸受。 In order to achieve the above object, the present invention provides the following self-aligning roller bearing.
(1) In a self-aligning roller bearing including an inner ring, an outer ring, a roller, and a cage, a solid lubricant film is formed on the outer peripheral surface of the outer ring via a phosphate film. Center roller bearing.
(2) The self-aligning roller bearing according to (1), wherein the phosphate coating is made of manganese phosphate.
(3) The self-aligning roller bearing according to (1) or (2), wherein the solid lubricating film is made of molybdenum disulfide.
(4) The automatic adjustment according to any one of (1) to (3), wherein a total film thickness of the phosphate coating and the solid lubricating coating is 0.1 μm or more and 10 μm or less. Center roller bearing.
(5) The self-aligning roller bearing according to any one of (1) to (4), wherein the solid lubricant film has a surface roughness of 0.01 μmRa or more and 1.0 μmRa or less.

本発明の自動調心ころ軸受は、外輪の外周面に、摺動性に優れ、耐久性にも優れる固体潤滑被膜を密着性良く形成したことにより、良好な摺動性が長期間維持される。そのため、例えばエレベータ巻上げ機の自由側軸受に使用した場合、軸受の温度上昇に伴う主軸の伸びを解消するように効果的に動き、固定側軸受に過大なアキシャル荷重が発生することを長期にわたり防止でき、軸受の信頼性を格段に向上させることが可能になる。   In the self-aligning roller bearing of the present invention, a good lubricity is maintained for a long period of time by forming a solid lubricating film having excellent slidability and durability on the outer peripheral surface of the outer ring with good adhesion. . For this reason, for example, when used for the free side bearing of an elevator hoisting machine, it effectively moves so as to eliminate the extension of the main shaft accompanying the temperature rise of the bearing, and prevents an excessive axial load from being generated on the fixed side bearing for a long period of time. This can greatly improve the reliability of the bearing.

自動調心ころ軸受の一例を示す断面図である。It is sectional drawing which shows an example of a self-aligning roller bearing. 自動調心ころ軸受の他の例を示す断面図である。It is sectional drawing which shows the other example of a self-aligning roller bearing. リン酸塩被膜及び固体潤滑被膜の形成方法を説明するための模式図である。It is a schematic diagram for demonstrating the formation method of a phosphate film and a solid lubricating film. エレベータ巻上げ機を示す概略図である。It is the schematic which shows an elevator hoisting machine.

以下、図面を参照して本発明を詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the drawings.

本発明において自動調心ころ軸受の種類や構造には制限はなく、例えば図１に示す自動調心ころ軸受を例示することができる。図示される自動調心ころ軸受１は、内輪２と、外輪３と、内輪２と外輪３との間に転動自在に配された２列の球面ころ４と、内輪２と外輪３との間に球面ころ４を保持する保持器５と、で構成されており、内輪２と外輪３との間に形成される空間に潤滑剤（グリースや潤滑油）が充填されている。また、内輪２の外周面には２列の球面ころ４の軌道面２ａ，２ａが形成され、内輪２の外径は幅方向両端部よりも中央部の方が大きく形成されている。また、外輪３の内周面は、２列一体の球面軌道面３ａとされている。   In the present invention, the type and structure of the self-aligning roller bearing are not limited. For example, the self-aligning roller bearing shown in FIG. 1 can be exemplified. The illustrated self-aligning roller bearing 1 includes an inner ring 2, an outer ring 3, two rows of spherical rollers 4 disposed between the inner ring 2 and the outer ring 3, and an inner ring 2 and an outer ring 3. A cage 5 that holds the spherical roller 4 between them, and a space formed between the inner ring 2 and the outer ring 3 is filled with a lubricant (grease or lubricating oil). Further, raceway surfaces 2a and 2a of two rows of spherical rollers 4 are formed on the outer peripheral surface of the inner ring 2, and the outer diameter of the inner ring 2 is formed larger at the center than at both ends in the width direction. Further, the inner peripheral surface of the outer ring 3 is a two-row integral spherical raceway surface 3a.

また、上記では保持器５がプレス保持器であったが、図２に示すように保持器５をもみ抜き保持器とすることもできる。   Moreover, although the holder | retainer 5 was a press holder | retainer in the above, as shown in FIG. 2, the holder | retainer 5 can also be used as a machined holder.

本発明では、自動調心ころ軸受１の外輪３の外周面３ｂに、リン酸塩被膜を介して固体潤滑被膜を形成したことを特徴とするものであり、図３に示すように、下記手順により各被膜を成形する。   The present invention is characterized in that a solid lubricating film is formed on the outer peripheral surface 3b of the outer ring 3 of the self-aligning roller bearing 1 via a phosphate film. As shown in FIG. Each coating is formed by

先ず、外輪３を脱脂洗浄後、外周面以外にマスキングを行い、その後、リン酸塩処理を施して、リン酸塩被膜７を形成する（第一工程）。リン酸塩処理の方法は、特に限定されるものではないが、リン酸塩が溶解しているリン酸塩水溶液にマスキングした外輪３を浸漬して、外周面３ｂにリン酸塩被膜７を形成する方法ができる。また、リン酸塩の種類は特に限定されるものではなく、リン酸マンガン、リン酸亜鉛、リン酸鉄、リン酸カルシウム等が挙げられるが、それ自体に摺動性を有するリン酸マンガンが特に好ましい。   First, after the outer ring 3 is degreased and washed, masking is performed on portions other than the outer peripheral surface, and then a phosphate treatment is performed to form a phosphate coating 7 (first step). The method of phosphating is not particularly limited, but the outer ring 3 masked is immersed in a phosphate aqueous solution in which phosphate is dissolved to form a phosphate coating 7 on the outer peripheral surface 3b. You can do it. Moreover, the kind of phosphate is not particularly limited, and examples thereof include manganese phosphate, zinc phosphate, iron phosphate, calcium phosphate, and the like, and manganese phosphate having slidability in itself is particularly preferable.

次に、リン酸塩被膜７に、固体潤滑剤を投射材とするショットピーニングを施して、リン酸塩被膜７の上に固体潤滑剤からなる固体潤滑被膜８を積層する（第二工程）。これにより、リン酸塩被膜７を介して固体潤滑被膜８が形成され、外輪３の外周面３ｂに優れた潤滑性（摺動性）が付与される。また、リン酸塩被膜７を介在することにより固体潤滑被膜８を外輪３の外周面３ｂに直接形成する場合に比べて、密着性が増して被膜の脱落も防止される。   Next, shot peening using a solid lubricant as a projection material is performed on the phosphate coating 7, and a solid lubricant coating 8 made of a solid lubricant is laminated on the phosphate coating 7 (second step). Thereby, the solid lubricating film 8 is formed through the phosphate film 7, and excellent lubricity (sliding property) is imparted to the outer peripheral surface 3 b of the outer ring 3. Further, by interposing the phosphate coating 7, compared with the case where the solid lubricating coating 8 is directly formed on the outer peripheral surface 3b of the outer ring 3, the adhesion is increased and the coating is prevented from falling off.

リン酸塩被膜７によってもある程度の摺動性が付与されるものの、リン酸塩被膜７は表面に微小な凹部が形成される。そのため、外輪３の外周面３ｂの動きをスムーズにするには不十分であり、摩耗しやすく、摩擦もそれほど低くない。しかしながら、その上に固体潤滑剤を投射材とするショットピーニングが施されるので、リン酸塩被膜７の表面の凹部内に固体潤滑剤が充填されつつ固体潤滑被膜８が形成される。その結果、摺動性が格段に向上すると共に、表面粗さが改善し、外輪３の外周面３ｂの動きがスムーズになる。   Although a certain degree of slidability is imparted also by the phosphate coating 7, the phosphate coating 7 has minute recesses formed on the surface. Therefore, it is insufficient for smooth movement of the outer peripheral surface 3b of the outer ring 3, is easily worn, and friction is not so low. However, since shot peening using a solid lubricant as a projection material is performed thereon, the solid lubricant film 8 is formed while the solid lubricant is filled in the recesses on the surface of the phosphate film 7. As a result, the slidability is remarkably improved, the surface roughness is improved, and the movement of the outer peripheral surface 3b of the outer ring 3 becomes smooth.

固体潤滑被膜８の表面粗さは、０．０１μｍＲａ以上１．０μｍＲａ以下が好ましく、０．０１μｍＲａ以上０．５μｍＲａ以下がより好ましい。エレベータ巻上げ機では、軸受に防錆油等が塗布されることがあるが、表面粗さが０．０１μｍＲａ未満では表面の凹凸が油溜りとして機能しなくなり、防錆油等が保持されにくくなり、好ましくない。表面粗さが 1．０μｍＲａを超えるときは、表面の凹凸によりハウジングへの挿入性が低下し、好ましくない。   The surface roughness of the solid lubricating coating 8 is preferably 0.01 μmRa or more and 1.0 μmRa or less, and more preferably 0.01 μmRa or more and 0.5 μmRa or less. In the elevator hoisting machine, rust preventive oil or the like may be applied to the bearing, but if the surface roughness is less than 0.01 μmRa, the surface unevenness does not function as an oil reservoir, and the rust preventive oil or the like is difficult to be retained, It is not preferable. When the surface roughness exceeds 1.0 μmRa, the insertability into the housing is deteriorated due to the unevenness of the surface, which is not preferable.

ショットピーニングの方法は特に限定されるものではなく、慣用の方法を採用することが可能である。また、固体潤滑剤の種類は特に限定されるものではなく、二硫化モリブデン、二硫化タングステン、黒鉛、窒化ホウ素、ポリテトラフルオロエチレン等が挙げられるが、二硫化モリブデンが特に好ましい。   The method of shot peening is not particularly limited, and a conventional method can be adopted. The type of solid lubricant is not particularly limited, and examples thereof include molybdenum disulfide, tungsten disulfide, graphite, boron nitride, polytetrafluoroethylene, and the like, but molybdenum disulfide is particularly preferable.

また、リン酸塩被膜７と固体潤滑被膜８との合計の膜厚は０．１μｍ以上１０μｍ以下が好ましく、０．５μｍ以上３．０μｍ以下がより好ましい。全体の膜厚が０．１μｍ未満では、摩耗して直ぐに消滅するため好ましくない。全体の膜厚が１０μｍを超えると、被膜が脱落しやすくなり好ましくない。脱落した被膜は異物として作用する。   The total film thickness of the phosphate coating 7 and the solid lubricating coating 8 is preferably 0.1 μm or more and 10 μm or less, and more preferably 0.5 μm or more and 3.0 μm or less. An overall film thickness of less than 0.1 μm is not preferable because it wears out and disappears immediately. If the total film thickness exceeds 10 μm, the coating tends to fall off, which is not preferable. The fallen film acts as a foreign substance.

このようにしてリン酸塩被膜７を介して固体潤滑被膜８を成形した後、グリースや潤滑油を充填して本発明の自動調心ころ軸受が完成する。尚、グリースや潤滑油には制限はない。   After forming the solid lubricating film 8 through the phosphate film 7 in this way, the self-aligning roller bearing of the present invention is completed by filling with grease or lubricating oil. There are no restrictions on grease or lubricating oil.

また、上記の自動調心ころ軸受は、エレベータの巻上げ機に組み込まれる場合、自由側（図４の軸受１２）に使用することができる。   Further, the above self-aligning roller bearing can be used on the free side (bearing 12 in FIG. 4) when incorporated in an elevator hoisting machine.

以下に実施例及び比較例を挙げて本発明を更に説明するが、本発明はこれにより何ら制限されるものではない。   Examples The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited thereby.

（実施例１）
試験軸受として、図２に示すようなもみ抜き保持器を有する内径２００ｍｍ、外径３６０ｍｍ、幅１２８ｍｍのエレベータ巻上げ機に使用されている自動調心ころ軸受を用意した。そして、外輪をアセトン中で１０分間超音波洗浄した後に、７０℃で２分間アルカリ脱脂処理を行い、更にイオン交換水で洗浄した後に、４０℃の表面調整剤（日本パーカライジング（株）「プレパレン５５Ａ」と「プレパレン５５Ｂ」とを混合し懸濁させた懸濁液）中で４０秒間前処理を行った。次いで、外輪の外周面以外をマスキングし、マンガンイオンが溶解しているリン酸水溶液に浸漬し、９５℃で１０分間化成処理を施してリン酸マンガン被膜を形成した。リン酸マンガン被膜の膜厚は５μｍで、表面粗さは０．９μｍＲａであった。その後、二硫化モリブデン粉末を用いたショットピーニングを行い、リン酸マンガン被膜の上に二硫化モリブデン被膜を形成した。このショットピーニングはバレルを用いて行い、その条件は、圧力０．５ＭＰａ、処理時間１０分間とした。得られた、リン酸マンガン被膜と二硫化モリブデン被膜との合計膜厚は３．０μｍで、表面粗さは０．３μｍＲａであった。 Example 1
As a test bearing, a self-aligning roller bearing used in an elevator hoisting machine having an inner diameter of 200 mm, an outer diameter of 360 mm, and a width of 128 mm having a machined cage as shown in FIG. 2 was prepared. The outer ring was ultrasonically cleaned in acetone for 10 minutes, then subjected to alkaline degreasing treatment at 70 ° C. for 2 minutes, and further washed with ion-exchanged water. ”And“ preparene 55B ”were mixed and suspended in the suspension) for 40 seconds. Next, masking was performed on portions other than the outer peripheral surface of the outer ring, immersed in a phosphoric acid aqueous solution in which manganese ions were dissolved, and a chemical conversion treatment was performed at 95 ° C. for 10 minutes to form a manganese phosphate coating. The manganese phosphate coating had a thickness of 5 μm and a surface roughness of 0.9 μm Ra. Then, shot peening using molybdenum disulfide powder was performed to form a molybdenum disulfide film on the manganese phosphate film. This shot peening was performed using a barrel, and the conditions were a pressure of 0.5 MPa and a treatment time of 10 minutes. The total film thickness of the obtained manganese phosphate coating and molybdenum disulfide coating was 3.0 μm, and the surface roughness was 0.3 μm Ra.

（比較例１）
実施例１と同様にして外輪の外周面にリン酸マンガン被膜のみを形成し、試験軸受とした。 (Comparative Example 1)
In the same manner as in Example 1, only the manganese phosphate coating was formed on the outer peripheral surface of the outer ring to obtain a test bearing.

（比較例２）
リン酸マンガン被膜及び二硫化モリブデン被膜を形成することなく、試験軸受をそのまま使用した。 (Comparative Example 2)
The test bearing was used as it was without forming a manganese phosphate coating and a molybdenum disulfide coating.

（比較例３）
リン酸マンガン被膜を形成することなく、実施例１と同様にして外輪の外周面に二硫化モリブデン被膜のみを形成し、試験軸受とした。 (Comparative Example 3)
Without forming a manganese phosphate coating, only a molybdenum disulfide coating was formed on the outer peripheral surface of the outer ring in the same manner as in Example 1 to obtain a test bearing.

上記の実施例１及び比較例１〜３の試験軸受について、図４に示すエレベータ巻取り機における軸受取付状態を模擬した試験機を用い、以下の条件にて運転を行い、ハイスピードカメラで自由側軸受の動きを観察した。そして、比較例２の試験軸受が動かなくなるまでの時間を１とした相対時間を求めた。結果を表１に示す。
・潤滑：グリース（フル充填）
・回転速度：３００ｍｉｎ−１、１分間回転⇔３０秒停止
・ラジアル荷重：２０００００Ｎ
・ハウジングとの隙間：５０μｍ For the test bearings of Example 1 and Comparative Examples 1 to 3 described above, using a test machine that simulates the bearing mounting state in the elevator winder shown in FIG. The movement of the side bearing was observed. Then, the relative time was determined with 1 as the time until the test bearing of Comparative Example 2 stopped moving. The results are shown in Table 1.
・ Lubrication: Grease (full filling)
・ Rotation speed: 300 min −1 , rotation for 1 minute 30 seconds stop ・ Radial load: 200000 N
・ Gap between housing: 50μm

Figure 2014228053
Figure 2014228053

表１から、実施例１のように、リン酸マンガン被膜を介して二硫化モリブデン被膜を形成することにより、外輪の外周面の動きを長期間にわたって維持できるようになる。これに対し、比較例１のようにリン酸マンガン被膜のみの場合は、表面の凹凸が存在するために、かえって未処理のものより短くなる。また、比較例３のように、二硫化モリブデン被膜のみの場合は、下地に化学的に結合しているリン酸マンガン被膜が無いために、外周面の表面から二硫化モリブデン被膜が容易に剥がれてしまい、未処理と大きな差異が無い。   From Table 1, it becomes possible to maintain the movement of the outer peripheral surface of the outer ring over a long period of time by forming the molybdenum disulfide coating through the manganese phosphate coating as in Example 1. On the other hand, in the case of only the manganese phosphate coating as in Comparative Example 1, since the surface irregularities exist, it becomes shorter than the untreated one. In addition, as in Comparative Example 3, in the case of only the molybdenum disulfide film, since there is no manganese phosphate film chemically bonded to the base, the molybdenum disulfide film is easily peeled off from the outer peripheral surface. There is no big difference from unprocessed.

１ 自動調心ころ軸受
２ 内輪
３ 外輪
４ 球面ころ
５ 保持器
７ リン酸塩被膜
８ 固体潤滑被膜 1 Spherical roller bearing 2 Inner ring 3 Outer ring 4 Spherical roller 5 Cage 7 Phosphate coating 8 Solid lubricating coating

Claims (5)

内輪、外輪、ころ及び保持器を備えた自動調心ころ軸受において、前記外輪の外周面に、リン酸塩被膜を介して固体潤滑被膜が形成されていることを特徴とする自動調心ころ軸受。   A self-aligning roller bearing comprising an inner ring, an outer ring, a roller and a cage, wherein a solid lubricating film is formed on the outer peripheral surface of the outer ring via a phosphate film. . 前記リン酸塩被膜がリン酸マンガンからなることを特徴とする請求項１記載の自動調心ころ軸受。   The self-aligning roller bearing according to claim 1, wherein the phosphate coating is made of manganese phosphate. 前記固体潤滑被膜が二硫化モリブデンからなることを特徴とする請求項１または２記載の自動調心ころ軸受。   The self-aligning roller bearing according to claim 1 or 2, wherein the solid lubricating film is made of molybdenum disulfide. 前記リン酸塩被膜と前記固体潤滑被膜との合計膜厚が０．１μｍ以上１０μｍ以下であることを特徴とする請求項１〜３の何れか１項に記載の自動調心ころ軸受。   The self-aligning roller bearing according to any one of claims 1 to 3, wherein a total film thickness of the phosphate coating and the solid lubricating coating is 0.1 µm or more and 10 µm or less. 前記固体潤滑被膜の表面粗さが０．０１μｍＲａ以上１．０μｍＲa以下であることを特徴とする請求項１〜４の何れか１項に記載の自動調心ころ軸受。   The self-aligning roller bearing according to any one of claims 1 to 4, wherein a surface roughness of the solid lubricant film is 0.01 µmRa or more and 1.0 µmRa or less.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017129252A (en) * 2016-01-22 2017-07-27 日本精工株式会社 Railroad vehicle bearing unit
KR102109525B1 (en) * 2020-01-20 2020-05-12 윤희성 Ball Bearing for Lubricating Using Graphite and Method for Manufacturing the Same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017129252A (en) * 2016-01-22 2017-07-27 日本精工株式会社 Railroad vehicle bearing unit
KR102109525B1 (en) * 2020-01-20 2020-05-12 윤희성 Ball Bearing for Lubricating Using Graphite and Method for Manufacturing the Same

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