JPH07197936A - Solid lubricating roller bearing - Google Patents
Solid lubricating roller bearingInfo
- Publication number
- JPH07197936A JPH07197936A JP35302493A JP35302493A JPH07197936A JP H07197936 A JPH07197936 A JP H07197936A JP 35302493 A JP35302493 A JP 35302493A JP 35302493 A JP35302493 A JP 35302493A JP H07197936 A JPH07197936 A JP H07197936A
- Authority
- JP
- Japan
- Prior art keywords
- cage
- rolling bearing
- resin
- solid
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は高温、真空中、極低温、
放射線下など潤滑油やグリースが使用できない環境下で
使用する固体潤滑転がり軸受に関する。BACKGROUND OF THE INVENTION The present invention is applicable to high temperature, vacuum, cryogenic temperature,
The present invention relates to a solid lubrication rolling bearing used in an environment where lubricating oil or grease cannot be used, such as under radiation.
【０００２】[0002]
【従来の技術】従来、高温、真空中、極低温、放射線下
など潤滑油やグリースが使用できない環境下で運転する
各種機器の転がり軸受の潤滑方法には例えば次の三つが
ある。 （１）内輪、外輪、保持器および転動体の全部または一
部の摺動面にスパッタリングなどで二硫化モリブデン
（ＭｏＳ2)や銀（Ａｇ）などの薄い潤滑被膜を形成する
方法で、その代表例は特開昭５５―５７７１７号、特開
昭５８―１１３６２９号および特開昭６１―５５４１０
号に開示されている。 （２）プラスチックもしくはプラスチックに固体潤滑剤
を添加した高分子系複合材料を用いて保持器を形成し、
転動体と保持器との摩擦によって、保持器材料を転動体
および転動体を介して内輪、外輪に移着させて薄い潤滑
膜を形成する方法で、その代表例として、ポリテトラフ
ルオロエチレン樹脂（以下ＰＴＦＥと略す）にガラス繊
維とＭｏＳ2 を添加して形成したルーロンＥ（ＮＴＮ，
ルーロン社の商品名）やＤｕｒｏｉｄ（米国、Ｂａｒｄ
ｅｎ社の商品名）などで形成した保持器がある。そのほ
か、ポリフェニレンサルファイト（ＰＰＳ）系複合樹脂
（ＮＳＫ社製）で形成した保持器がある。また、特開平
４―１０２７１８号に開示されているように、ＰＴＦＥ
とＭｏＳ2 と芳香族ポリアミド繊維を添加したポリエー
テルエーテルケトン（ＰＥＥＫ）樹脂から形成された保
持器がある。ＰＴＦＥやＰＥＥＫ以外の高分子系複合材
料としては熱的に安定した特性を持つポリイミド（例え
ば、米国ＤｕＰｏｎｔ社の商品名ベスペルＳＰ−３）か
ら形成された保持器がある。 （３）ＭｏＳ2 、二硫化タングステン（ＷＳ2)等の固体
潤滑剤を金属または合金に添加した焼結合金からなる保
持器を使用し、転動体と保持器との摩擦によって保持器
材料を転動体および転動体を介して内輪、外輪に移着さ
せて薄い潤滑膜を形成する方法で、その代表例は特開昭
６２―１５１５３９号、特開昭６３―２４６５０７号に
開示されている。2. Description of the Related Art Conventionally, there are, for example, the following three methods of lubricating rolling bearings of various equipment which are operated in environments where lubricating oil or grease cannot be used, such as high temperature, vacuum, extremely low temperature and radiation. (1) A method of forming a thin lubricating coating such as molybdenum disulfide (MoS 2 ) or silver (Ag) on all or part of the sliding surfaces of the inner ring, outer ring, cage and rolling element by sputtering or the like. Examples are JP-A-55-57717, JP-A-58-113629 and JP-A-61-55410.
No. (2) A cage is formed by using plastic or a polymer composite material in which a solid lubricant is added to plastic,
By friction between the rolling element and the cage, the cage material is transferred to the inner ring and the outer ring through the rolling element and the rolling element to form a thin lubricating film. As a typical example, polytetrafluoroethylene resin ( Rulon E (NTN, formed by adding glass fiber and MoS 2 to PTFE)
Ruron's product name) and Duroid (Bard, USA)
There is a retainer formed by a product name such as "en". In addition, there is a cage formed of polyphenylene sulfite (PPS) -based composite resin (manufactured by NSK). In addition, as disclosed in Japanese Patent Application Laid-Open No. 4-102718, PTFE
There is a cage made of polyetheretherketone (PEEK) resin with MoS 2 and aromatic polyamide fibers added. As a polymer composite material other than PTFE and PEEK, there is a cage formed of polyimide having a thermally stable characteristic (for example, Vespel SP-3, trade name of DuPont, USA). (3) A cage made of a sintered alloy obtained by adding a solid lubricant such as MoS 2 or tungsten disulfide (WS 2 ) to a metal or an alloy is used, and the cage material is rolled by friction between the rolling element and the cage. A method of forming a thin lubricating film by transferring to a inner ring and an outer ring through a moving body and a rolling body, and representative examples thereof are disclosed in JP-A-62-151539 and JP-A-63-246507.
【０００３】[0003]
【発明が解決しようとする課題】ところが、前述の
（１）のように予め薄い潤滑膜を形成させておく方法で
は、摩擦によって膜が摩耗すれば潤滑効果が消失し、基
材の金属が露出して焼きつきを生じるため、一般に短寿
命である。高分子系複合材料を用いた（２）の方法では
保持器の製作は容易であるが、連続使用温度が約２５０
℃以下であり、あまり高温条件下では使用できない欠点
がある。また、（３）のように焼結金属を用いた保持器
では、材料が脆いため機械加工性が悪く、使用時に割れ
たり、摩擦音が大きい、大気中での摩耗が極めて大きい
という問題がある。このように、従来の固体潤滑転がり
軸受では寿命が短く、耐熱性が低く、さらに、保持器の
加工性も悪いなどの問題がある。そこで本発明は、保持
器の製作加工が容易で、高温での寿命が長い固体潤滑転
がり軸受を提供することを目的とする。However, in the method of forming a thin lubricating film in advance as in the above (1), if the film is worn by friction, the lubricating effect disappears and the base metal is exposed. As a result, seizure occurs and the life is generally short. The method (2) using a polymer composite material makes it easy to manufacture a cage, but the continuous use temperature is about 250.
Since it is below ℃, there is a drawback that it cannot be used under high temperature conditions. Further, the cage using the sintered metal as in (3) has problems that the machinability is poor because the material is brittle, cracks during use, the friction noise is large, and the wear in the atmosphere is extremely large. As described above, the conventional solid lubrication rolling bearing has problems such as a short life, low heat resistance, and poor workability of the cage. Therefore, an object of the present invention is to provide a solid lubrication rolling bearing in which the cage can be easily manufactured and processed and which has a long life at high temperatures.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決するた
め、本発明は内輪と、外輪と、内輪と外輪との軌道溝の
間に収納される転動体と、転動体を案内保持する保持器
とからなる転がり軸受において、保持器は自己潤滑能力
を有する耐熱性有機系材料のポリベンゾイミダゾール
（ＰＢＩ）樹脂で構成している。ＰＢＩ樹脂にグラファ
イト、二硫化モリブデン、窒化ホウ素の固体潤滑剤とカ
ーボンファイバー、ガラスファイバーの充填剤を添加し
た複合材料するとさらによい。In order to solve the above problems, the present invention provides an inner ring, an outer ring, a rolling element housed between the raceways of the inner ring and the outer ring, and a retainer for guiding and holding the rolling element. In the rolling bearing composed of and, the cage is made of polybenzimidazole (PBI) resin which is a heat resistant organic material having a self-lubricating ability. It is more preferable to use a composite material in which a solid lubricant such as graphite, molybdenum disulfide, or boron nitride and a filler of carbon fiber or glass fiber is added to PBI resin.
【０００５】[0005]
【作用】上記手段により、ＰＢＩ樹脂はガラス転移点が
約４２７℃、熱変形温度が４３５℃と高く、−２００°
Ｃの極低温でも物性を保持しており、耐熱性が高く強靱
で、耐摩耗性にも優れているので、高温雰囲気や真空中
において変形することなく使用することができる。ま
た、ＰＢＩ樹脂にグラファイトや二硫化モリブデンまた
は窒化ホウ素などの層状固体潤滑剤を添加することによ
り、摺動性が向上しかつ移着し易くすると共に相手面と
の間で潤滑性が良好になり、カーボンファイバーなどの
強化剤を充填することにより、機械強度を向上させてい
る。By the above means, the PBI resin has a high glass transition point of about 427 ° C and a high heat distortion temperature of 435 ° C, and is -200 ° C.
Since it retains physical properties even at an extremely low temperature of C, has high heat resistance, is tough, and has excellent wear resistance, it can be used without deformation in a high temperature atmosphere or vacuum. Further, by adding a layered solid lubricant such as graphite, molybdenum disulfide or boron nitride to the PBI resin, the slidability is improved and transfer is facilitated, and the lubricity with the mating surface is improved. The mechanical strength is improved by filling with a reinforcing agent such as carbon fiber.
【０００６】[0006]
【実施例】以下、本発明の実施例を図を用いて説明す
る。図１は本発明の固体潤滑転がり軸受の断面図であ
る。図において、１はステンレス鋼ＳＵＳ４４０Ｃから
なる内輪、２は内輪１と同じ材質からなる外輪、３は軌
道溝、４は転動体、５は保持器、６は軌道溝３の表面に
スパッタにより厚さ０．５μｍの二硫化モリブデンを施
したスパッタ膜である。保持器５は表１に示す種類の材
料を押出成形し直径２０ｍｍの丸棒とした。この後、機
械加工により図のような形状に仕上げた。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a solid lubricating rolling bearing of the present invention. In the figure, 1 is an inner ring made of stainless steel SUS440C, 2 is an outer ring made of the same material as the inner ring 1, 3 is a raceway groove, 4 is a rolling element, 5 is a cage, 6 is a thickness of the raceway groove 3 by sputtering. It is a sputtered film of 0.5 μm molybdenum disulfide. The cage 5 was formed by extruding the materials shown in Table 1 into a round bar having a diameter of 20 mm. After that, the shape as shown in the figure was finished by machining.
【０００７】[0007]
【表１】 [Table 1]
【０００８】Ｎｏ１はポリベンゾイミダゾール（ＰＢ
Ｉ）樹脂が１００％のもの（米国ヘキスト・セラニーズ
社製、商品名 セラゾールＵ−６０）で、Ｎｏ２は軌道
溝３および転動体４の表面に二硫化モリブデンをスパッ
タによりコーティングしたものである。Ｎｏ３からＮｏ
６はＰＢＩ樹脂に強化剤としてカーボンフアイバおよび
固体潤滑剤としてグラファイトを配合した複合材料（米
国ヘキスト・セラニーズ社製、商品名 セラゾールＴＬ
−６０）である。配合比は重量％（ｗｔ％）である。Ｎ
ｏ７とＮｏ８は固体潤滑剤として二硫化モリブデンを強
化剤としてグラスファイバを配合したものである。Ｎｏ
５は軸受の軌道溝３の表面にスパッタにより厚さ０．５
μｍの二硫化モリブデンのスパッタ膜を施してある。こ
の保持器を枠番＃６０８の玉軸受に組み立てた。なお、
比較例としてつぎの従来の樹脂を用いて実施例と同様の
保持器を作製したものを用いた。 ＰＥＥＫ系 ポリテトラフルオロエチレン（ＰＴＦＥ）樹脂にＭｏＳ
2 と香族ポリアミド繊維およびポリエーテルエーテルケ
トン（ＰＥＥＫ）樹脂とを添加したものである。 ＰＰＳ系 ポリフェニレンサルファイト（ＰＰＳ）系複合樹脂（Ｎ
ＳＫ社製）である。つぎに、これらの実施例および比較
例の軸受を下記の条件で耐久テストを行い、軸受寿命を
測定した。 ・雰囲気圧力 １×１０ー6 Ｔｏｒｒ ・雰囲気温度 ３００°Ｃ、３５０°Ｃ ・スラスト荷重 ２．０ｋｇｆ ・ラジアル荷重 ０．２ｋｇｆ ・回転速度 １２００ｒｐｍ 耐久テストの結果を表２に示す。No. 1 is polybenzimidazole (PB
I) 100% resin (trade name: Cerazole U-60, manufactured by Hoechst Celanese Co., USA), No. 2 is the one in which the surfaces of the raceway grooves 3 and the rolling elements 4 are coated with molybdenum disulfide by sputtering. No3 to No
6 is a composite material in which PBI resin is mixed with carbon fiber as a reinforcing agent and graphite as a solid lubricant (manufactured by Hoechst Celanese, USA, trade name: Cerazole TL).
-60). The compounding ratio is% by weight (wt%). N
Nos. o7 and No. 8 are glass fibers mixed with molybdenum disulfide as a solid lubricant. No
5 has a thickness of 0.5 on the surface of the bearing raceway groove 3 by sputtering.
A μm sputtered film of molybdenum disulfide is applied. This cage was assembled to a ball bearing of frame number # 608. In addition,
As a comparative example, a cage manufactured by using the following conventional resin was used. PEEK polytetrafluoroethylene (PTFE) resin with MoS
2 and aromatic polyamide fiber and polyetheretherketone (PEEK) resin were added. PPS-based polyphenylene sulfite (PPS) -based composite resin (N
Manufactured by SK). Next, the bearings of these Examples and Comparative Examples were subjected to a durability test under the following conditions to measure the bearing life.・ Atmospheric pressure 1 × 10 -6 Torr ・ Atmospheric temperature 300 ° C, 350 ° C ・ Thrust load 2.0 kgf ・ Radial load 0.2 kgf ・ Rotation speed 1200 rpm Table 2 shows the results of the durability test.
【０００９】[0009]
【表２】 [Table 2]
【００１０】本発明のＮｏ１からＮｏ８の転がり軸受は
３００°Ｃおよび３５０°Ｃの高温・真空中で比較例よ
りも長寿命を示した。このように、本発明の転がり軸受
は固体潤滑剤として転がり接触面にコーティングされた
二硫化モリブデンとポリベンゾイミダゾール樹脂のセラ
ゾールまたはカーボンファイバーとグラファイトと窒化
ホウ素とを充填したポリベンゾイミダゾール樹脂のセラ
ゾール複合材料の保持器とを潤滑剤として併用している
ので、転がり軸受の回転初期においては、転がり接触面
にコーティングされた二硫化モリブデンが潤滑作用に機
能し、使用時間と共にこの膜が摩耗により消滅していく
と、転動体４と保持器５との接触で、保持器自体から転
動体の表面に、更に軌道面に適量ずつ転移膜７が形成さ
れつづける。そのため、真空中において長期の寿命が確
保できる。すなわち、従来の固体潤滑剤利用の転がり軸
受に比べ、長寿命であるため長期間メンテナスフリーと
なり、摩擦音が小さい転がり軸受を提供できる。なお、
本実施例では押出成形品から機械加工によって保持器を
製作したが、保持器の金形を作れば、圧縮成形あるいは
射出成形によって成形も可能である。また、本実施例で
は深溝形の転がり軸受をもちいたが、これに限らず保持
器の形状が王冠形のアンギュラ軸受やもみぬきの形状の
円筒ころ軸受などにも十分適用できることは明らかであ
る。The No. 1 to No. 8 rolling bearings of the present invention showed a longer life than the comparative example in a high temperature and vacuum of 300 ° C and 350 ° C. Thus, the rolling bearing of the present invention is a solid lubricant containing molybdenum disulfide coated on the rolling contact surface and cerazole of polybenzimidazole resin, or cerazole composite of polybenzimidazole resin filled with carbon fiber, graphite and boron nitride. Since the material retainer is also used as a lubricant, the molybdenum disulfide coated on the rolling contact surface functions as a lubricant at the beginning of rotation of the rolling bearing, and this film disappears due to wear over time. As the rolling elements 4 and the cage 5 come into contact with each other, the transfer film 7 continues to be formed from the cage itself to the surface of the rolling element and to the raceway surface in appropriate amounts. Therefore, a long life can be secured in vacuum. That is, as compared with the conventional rolling bearing using a solid lubricant, the rolling bearing has a long life and thus is maintenance-free for a long period of time, and a rolling bearing with a low friction noise can be provided. In addition,
In the present embodiment, the cage was manufactured from the extruded product by machining, but if the cage is made into a die, it can be molded by compression molding or injection molding. Further, although the deep groove type rolling bearing is used in the present embodiment, it is obvious that the present invention is not limited to this, and can be sufficiently applied to an angular bearing having a crown-shaped cage or a cylindrical roller bearing having a hollow shape.
【００１１】[0011]
【発明の効果】以上述べたように本発明によれば、保持
器の材料に耐熱性の高いポリベンゾイミダゾール樹脂を
用いたので、高温雰囲気中で使用できまた、この樹脂に
固体潤滑剤としてグラファイトと窒化ホウ素等を強化剤
としてカーボンファイバ等を充填したので、摺動性が向
上しかつ機械強度の高い転がり軸受を得る効果がある。As described above, according to the present invention, since polybenzimidazole resin having high heat resistance is used as the material of the cage, it can be used in a high temperature atmosphere, and graphite can be used as a solid lubricant for this resin. Since carbon fiber or the like is filled with boron nitride or the like as a reinforcing agent, there is an effect that a sliding bearing is improved and a rolling bearing having high mechanical strength is obtained.
【図１】本発明の実施例を示す転がり軸受の断面図であ
る。FIG. 1 is a sectional view of a rolling bearing showing an embodiment of the present invention.
【図２】図１における保持器の斜視図である。FIG. 2 is a perspective view of the cage in FIG.
１：内輪 ２：外輪 ３：軌道溝 ４：転動体 ５：保持器 ６：スパッタ膜 1: Inner ring 2: Outer ring 3: Raceway groove 4: Rolling element 5: Cage 6: Sputtered film
Claims (4)
溝の間に収納される転動体と、前記転動体を案内保持す
る保持器とからなる転がり軸受において、 前記保持器は自己潤滑能力を有する耐熱性有機系材料の
ポリベンゾイミダゾール樹脂からなることを特徴とする
固体潤滑転がり軸受。1. A rolling bearing comprising an inner ring, an outer ring, a rolling element housed between raceway grooves of the inner ring and the outer ring, and a cage for guiding and holding the rolling element, wherein the cage is self-supporting. A solid lubricating rolling bearing, which is made of a polybenzimidazole resin which is a heat-resistant organic material having a lubricating ability.
滑剤であるグラファイト、二硫化モリブデン、窒化ホウ
素のうち少なくとも一つと、樹脂の強化剤であるカーボ
ンファイバーまたはガラスファイバーのいずれか一つと
を充填した複合材料であることを特徴とする請求項１記
載の固体潤滑転がり軸受。2. A composite in which the polybenzimidazole resin is filled with at least one of graphite, molybdenum disulfide, and boron nitride, which are solid lubricants, and either carbon fiber or glass fiber, which is a reinforcing agent for the resin. The solid lubrication rolling bearing according to claim 1, which is made of a material.
２０ｗｔ％、グラファイトを３〜１５ｗｔ％、窒化ホウ
素を１〜１０ｗｔ％、残部をポリベンゾイミダゾール樹
脂の組成としたことを特徴とする請求項２記載の固体潤
滑転がり軸受。3. The composite material comprises 5 to 5 carbon fibers.
The solid lubricating rolling bearing according to claim 2, wherein the composition is 20 wt%, graphite is 3 to 15 wt%, boron nitride is 1 to 10 wt%, and the balance is a polybenzimidazole resin.
は全部に二硫化モリブデンまたは銀の潤滑被膜を施す保
持器を有することを特徴とする請求項１から３のいずれ
かに記載の固体潤滑転がり軸受。4. The solid according to claim 1, further comprising a cage for applying a lubricating coating of molybdenum disulfide or silver to the surface of the raceway groove and a part or all of the rolling elements. Lubricated rolling bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35302493A JP3358752B2 (en) | 1993-12-28 | 1993-12-28 | Solid lubricated rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35302493A JP3358752B2 (en) | 1993-12-28 | 1993-12-28 | Solid lubricated rolling bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07197936A true JPH07197936A (en) | 1995-08-01 |
| JP3358752B2 JP3358752B2 (en) | 2002-12-24 |
Family
ID=18428055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35302493A Expired - Lifetime JP3358752B2 (en) | 1993-12-28 | 1993-12-28 | Solid lubricated rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3358752B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001181501A (en) * | 1999-12-24 | 2001-07-03 | Clariant (Japan) Kk | Sliding material |
| WO2023189465A1 (en) * | 2022-03-28 | 2023-10-05 | Ntn株式会社 | Cage and deep groove ball bearing |
-
1993
- 1993-12-28 JP JP35302493A patent/JP3358752B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001181501A (en) * | 1999-12-24 | 2001-07-03 | Clariant (Japan) Kk | Sliding material |
| WO2001048088A1 (en) * | 1999-12-24 | 2001-07-05 | Clariant International Ltd. | Sliding material |
| WO2023189465A1 (en) * | 2022-03-28 | 2023-10-05 | Ntn株式会社 | Cage and deep groove ball bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3358752B2 (en) | 2002-12-24 |
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