JP2005179571A - Impregnation bearing oil and bearing impregnated therewith - Google Patents

Impregnation bearing oil and bearing impregnated therewith Download PDF

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JP2005179571A
JP2005179571A JP2003424787A JP2003424787A JP2005179571A JP 2005179571 A JP2005179571 A JP 2005179571A JP 2003424787 A JP2003424787 A JP 2003424787A JP 2003424787 A JP2003424787 A JP 2003424787A JP 2005179571 A JP2005179571 A JP 2005179571A
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oil
impregnated bearing
impregnated
bearing
bearing oil
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Tsuguo Inasawa
嗣夫 稲澤
Teru Yoshinari
照 吉成
Shinya Kondo
信也 近藤
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Kyodo Yushi Co Ltd
Panasonic Holdings Corp
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Kyodo Yushi Co Ltd
Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an impregnation bearing oil having low viscosity and having an excellent lubricating property over a long period in a wide temperature range and reduced in abrasion and clearance sound and a bearing impregnated therewith and to provide use of the impregnation bearing oil. <P>SOLUTION: The prevent invention provides the impregnation bearing oil comprising a base oil, a vegetable oil and fat and a copper corrosion inhibitor and a bearing impregnated with the bearing oil and provides use of the impregnation bearing oil. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、含浸軸受油及びそれを含浸させた軸受に関し、さらに詳細には、例えば通信機器用振動モータ、AV機器用のスピンドルモータ等、含浸軸受に含浸させて使用する潤滑油の改良に関する。   The present invention relates to an impregnated bearing oil and a bearing impregnated with the same, and more particularly to improvement of a lubricating oil used by impregnating an impregnated bearing such as a vibration motor for communication equipment and a spindle motor for AV equipment.

含浸軸受とは. 多孔質の材料に潤滑剤を含浸させた軸受である。金属系の軸受である焼結含浸軸受は、滑り軸受の1種であり取扱い性がよく、量産性に優れた低価格軸受で、現在では家電製品、画像、音響機器、OA、情報機器、自動車、精密機械などの摺動部品として広く使用されている。
また近年、焼結含浸軸受内面に動圧用の溝加工部等を有し、潤滑剤を充填した動圧型含浸軸受も精密・高信頼性軸受として使用されている。
含浸油には、鉱油または炭化水素系、フッ素系、エステル系、エーテル系などの合成油や液状グリースなどが用いられている。一般に、低粘度の潤滑剤が高速、軽荷重で使用され、高粘度の潤滑剤が低速、高荷重条件で使用される。また添加剤としては、アルキルジチオリン酸亜鉛(Zn−DTP)や、イオウ、リン系の極圧剤、あるいはアルコール、脂肪酸エステル等の油性剤及び酸化防止剤や防錆剤が使用されてきた。
An impregnated bearing is a bearing in which a porous material is impregnated with a lubricant. Sintered impregnated bearings, which are metal bearings, are low-priced bearings that are one type of sliding bearings, easy to handle, and excellent in mass productivity. Currently, they are home appliances, images, audio equipment, OA, information equipment, automobiles. Widely used as sliding parts for precision machines.
In recent years, a dynamic pressure type impregnated bearing having a groove portion for dynamic pressure on the inner surface of a sintered impregnated bearing and filled with a lubricant is also used as a precision and high reliability bearing.
As the impregnating oil, mineral oil, hydrocarbon-based, fluorine-based, ester-based, ether-based synthetic oil, liquid grease, or the like is used. Generally, low viscosity lubricants are used at high speeds and light loads, and high viscosity lubricants are used at low speeds and high load conditions. As additives, zinc alkyldithiophosphate (Zn-DTP), sulfur and phosphorus extreme pressure agents, oily agents such as alcohols and fatty acid esters, and antioxidants and rust inhibitors have been used.

例えば、ポリ−α−オレフィンまたはその水素化物を基油とし、リン酸エステルを配合したもの(例えば、特許文献1参照)、ポリ−α−オレフィンを基油とし、炭素数14〜20の脂肪族1価アルコールを組成物全体の1〜12質量%含有させたもの(例えば、特許文献2参照)等が挙げられる。
しかしながら、潤滑剤としては、回転時のトルク(軸ロス)低減のためには、低粘度であることが望ましいが、低粘度化に伴い、長時間の使用により油が消耗し金属接触が発生する。また起動直後にも軸受と軸の間に十分に油が存在しないため金属接触が発生する。これらの金属接触は、軸受の異常摩耗、クリアランス音等の発生の原因となる。
For example, a poly-α-olefin or a hydride thereof as a base oil and a phosphate ester blended (see, for example, Patent Document 1), a poly-α-olefin as a base oil, and an aliphatic group having 14 to 20 carbon atoms Examples thereof include those containing 1 to 12% by mass of monohydric alcohol (see, for example, Patent Document 2).
However, it is desirable for the lubricant to have a low viscosity in order to reduce the torque (axial loss) during rotation. However, as the viscosity decreases, the oil is consumed due to long-term use and metal contact occurs. . Also, metal contact occurs immediately after startup because there is not enough oil between the bearing and the shaft. These metal contacts cause abnormal wear of the bearing, clearance noise, and the like.

特開平11-269475号公報Japanese Patent Laid-Open No. 11-269475 特開2002-310156JP2002-310156

従って本発明の目的は、低粘度であり、幅広い温度範囲で長期にわたって優れた潤滑性を有し、摩耗、クリアランス音を低減させる含浸軸受油を提供することである。
本発明の他の目的は、モータの軸ロス(回転時のトルク)を低減するとともに、クリアランス音等の発生を低減させ、モータの耐久性と安定性を向上させることができる含浸軸受油を提供することである。
本発明のさらに他の目的は上記含浸軸受油を含浸させた含浸軸受を提供することである。
本発明のさらに他の目的は上記含浸軸受油の使用を提供することである。
Accordingly, an object of the present invention is to provide an impregnated bearing oil that has a low viscosity, has excellent lubricity over a long period of time in a wide temperature range, and reduces wear and clearance noise.
Another object of the present invention is to provide an impregnated bearing oil that can reduce motor shaft loss (torque during rotation), reduce the generation of clearance noise, and improve motor durability and stability. It is to be.
Still another object of the present invention is to provide an impregnated bearing impregnated with the above impregnated bearing oil.
Yet another object of the present invention is to provide use of the impregnated bearing oil.

本発明は以下の含浸軸受油、それを含浸させた含浸軸受、及びその使用を提供するものである。
1.基油、植物油脂及び銅腐食防止剤を含有する含浸軸受油。
2.さらに清浄分散剤を含む上記1記載の含浸軸受油。
3.基油がポリ−α−オレフィンである上記1又は2記載の含浸軸受油。
4.基油の粘度が、40℃で20〜50mm2/sである上記1〜3のいずれか1項記載の含浸軸受油。
5.銅腐食防止剤が、ベンゾトリアゾール誘導体である上記1〜4のいずれか1項記載の含浸軸受油。
6.植物油脂の配合量が0.01〜5.0質量%である上記1〜5のいずれか1項記載の含浸軸受油。
7.銅腐食防止剤の配合量が0.01〜5.0質量%である上記1〜6のいずれか1項記載の含浸軸受油。
8.洗浄分散剤が金属サリシレートである上記2〜7のいずれか1項記載の含浸軸受油。
9.洗浄分散剤の配合量が0.01〜10.0質量%である上記2〜8のいずれか1項記戴の含浸軸受油。
10.上記1〜9のいずれか1項記載の含浸軸受油を含浸させた含浸軸受。
11.モータ用焼結含浸軸受である上記10記載の含浸軸受。
12.モータ用焼結含浸軸受、又はモータ接点の摺動潤滑に用いる上記1〜9のいずれか1項記載の含浸軸受油の使用。
The present invention provides the following impregnated bearing oil, an impregnated bearing impregnated with the oil, and use thereof.
1. Impregnated bearing oil containing base oil, vegetable oil and copper corrosion inhibitor.
2. The impregnated bearing oil according to the above 1, further comprising a cleaning dispersant.
3. 3. The impregnated bearing oil according to 1 or 2 above, wherein the base oil is poly-α-olefin.
4). 4. The impregnated bearing oil according to any one of 1 to 3 above, wherein the base oil has a viscosity of 20 to 50 mm 2 / s at 40 ° C.
5). 5. The impregnated bearing oil according to any one of 1 to 4 above, wherein the copper corrosion inhibitor is a benzotriazole derivative.
6). 6. The impregnated bearing oil according to any one of 1 to 5 above, wherein the amount of vegetable oil / fat is 0.01 to 5.0% by mass.
7). 7. The impregnated bearing oil according to any one of 1 to 6 above, wherein the compounding amount of the copper corrosion inhibitor is 0.01 to 5.0% by mass.
8). 8. The impregnated bearing oil according to any one of 2 to 7 above, wherein the cleaning dispersant is a metal salicylate.
9. 9. The impregnated bearing oil according to any one of 2 to 8 above, wherein the amount of the cleaning dispersant is 0.01 to 10.0% by mass.
10. 10. An impregnated bearing impregnated with the impregnated bearing oil according to any one of 1 to 9 above.
11. 11. The impregnated bearing according to the above 10, which is a sintered impregnated bearing for a motor.
12 Use of the impregnated bearing oil according to any one of 1 to 9 described above for use in a sliding impregnation bearing for a motor or sliding lubrication of a motor contact.

本発明の含浸軸受油は、低粘度であるため回転時のトルクが低く、クリアランス音の軽減が可能であり、長時間使用した場合でも優れた潤滑性を維持することができる。   Since the impregnated bearing oil of the present invention has a low viscosity, the torque during rotation is low, the clearance noise can be reduced, and excellent lubricity can be maintained even when used for a long time.

本発明の軸受油に使用する基油は、特に限定されるものではなく、鉱油、あるいは合成油系のいずれのものでも用いることができる。
鉱油としては、例えばパラフィン系あるいはナフテン系原油を常圧蒸留するか、あるいは常圧蒸留の残渣油を減圧蒸留して得られる留出油、あるいは、これを常法に従って精製することにより得られる精製鉱油が挙げられる。
合成油としては、例えば、ポリ−α−オレフィン(PAO)、ポリブテン、ポリイソブチレン、アルキルベンゼン、ポリオールエステル、ジエステル、シリコーンオイル、ポリカーボネート、フェニルエーテルなどが挙げられる。なかでもポリ−α−オレフィンが熱安定性、酸化安定性、温度−粘度特性、樹脂材との適合性の点でより好ましい。
上記した各種の基油は、それぞれ単独で使用し、あるいは二種以上組み合わせて使用することができる。
The base oil used for the bearing oil of the present invention is not particularly limited, and any mineral oil or synthetic oil can be used.
Mineral oil is, for example, distilled oil obtained by atmospheric distillation of paraffinic or naphthenic crude oil, or distillate oil obtained by distilling residual oil of atmospheric distillation under reduced pressure, or purification obtained by purifying this according to a conventional method. Mineral oil.
Examples of the synthetic oil include poly-α-olefin (PAO), polybutene, polyisobutylene, alkylbenzene, polyol ester, diester, silicone oil, polycarbonate, and phenyl ether. Of these, poly-α-olefins are more preferable in terms of thermal stability, oxidation stability, temperature-viscosity characteristics, and compatibility with resin materials.
The various base oils described above can be used alone or in combination of two or more.

基油の粘度については、軸ロスを低減するためには、低粘度化が必要であり、良好な潤滑性を維持するためには40℃における動粘度が、好ましくは1〜4600 mm2/sのものが望ましい。しかし、低粘度の基油は高温に長時間さらされた場合、基油自身に含まれる低分子量成分の蒸発が起こりうる。そのため、本発明に使用する基油の粘度は、さらに好ましくは10〜100mm2/sであり、特に好ましくは20〜50mm2/sである。 Regarding the viscosity of the base oil, it is necessary to lower the viscosity in order to reduce the axial loss, and in order to maintain good lubricity, the kinematic viscosity at 40 ° C. is preferably 1 to 4600 mm 2 / s. Is desirable. However, when a low viscosity base oil is exposed to a high temperature for a long time, evaporation of low molecular weight components contained in the base oil itself may occur. Therefore, the viscosity of the base oil used in the present invention is more preferably 10 to 100 mm 2 / s, and particularly preferably 20 to 50 mm 2 / s.

軸受起動時などの油が軸受と軸の間に十分に存在しない場合、金属接触が起こる状況にあり、いわゆる境界潤滑の状態になる。この状態において金属間の直接接触を避け摩擦、摩耗を低減する手法として耐荷重添加剤が使用される。耐荷重添加剤は、金属表面に吸着して潤滑膜を形成するタイプと、金属と化学的に反応して潤滑膜を形成するタイプの二種類に大別される。金属と反応するタイプのものとしては、イオウ、リン系の化合物が挙げられるが、これらの化合物は高温状態となった場合金属材料を腐食させる事が知られており、特にモータ軸受周囲の接点に使用されている銀材料に対してはイオウを含む添加剤は使用できない。そのため本発明の含浸軸受油に使用する添加剤は、分子構造中にイオウを含まない添加剤である。
上記の金属表面に吸着し潤滑膜を形成するタイプの添加剤としては、焼結含浸軸受の主成分である鉄及び銅に選択的に吸着する金属依存性のある添加剤を用いる。それらの添加剤は金属表面に十分に残存することによりダンパー的な効果を発揮することが期待される。
When there is not enough oil between the bearing and the shaft, such as when the bearing is started, metal contact occurs, and so-called boundary lubrication occurs. In this state, a load-bearing additive is used as a technique for avoiding direct contact between metals and reducing friction and wear. Load-bearing additives are roughly classified into two types: a type that forms a lubricating film by adsorbing to the metal surface, and a type that forms a lubricating film by chemically reacting with the metal. Examples of the type that reacts with metals include sulfur and phosphorus compounds, but these compounds are known to corrode metal materials when heated to high temperatures, especially at the contacts around motor bearings. Additives containing sulfur cannot be used for the silver materials used. Therefore, the additive used for the impregnated bearing oil of the present invention is an additive that does not contain sulfur in the molecular structure.
As the type of additive that adsorbs to the metal surface and forms a lubricating film, an additive having metal dependency that selectively adsorbs to iron and copper, which are the main components of the sintered impregnated bearing, is used. These additives are expected to exert a damper effect by sufficiently remaining on the metal surface.

本発明において使用する植物油脂は、焼結軸受材に含まれる鉄成分に選択的に吸着する添加剤として作用するものである。植物油脂としては、例えば大豆油、菜種油、綿実油、コメ油、ヒマシ油、ヤシ油、パーム油、落花生油等が挙げられ、好ましいものはヒマシ油、ヤシ油、パーム油であり、特に好ましいものはパーム油である。また、油脂中の脂肪酸の二重結合に水素を付加させ、酸化及び熱安定性を向上させた水素添加油脂(一般に硬化油と呼ばれる)を本発明において植物油脂として使用することも出来る。これらは、単独または二種類以上混合して用いられる。
本発明の含浸軸受油中、植物油脂の含有量は、好ましくは0.01〜10.0質量%、さらに好ましくは0.05〜5.0質量%である。0.01質量%未満では添加効果が充分でなく、10.0質量%を超えると粘度が急激に上昇する傾向がある。
The vegetable oil used in the present invention acts as an additive that selectively adsorbs to the iron component contained in the sintered bearing material. Examples of vegetable oils include soybean oil, rapeseed oil, cottonseed oil, rice oil, castor oil, coconut oil, palm oil, peanut oil, and the like are preferably castor oil, coconut oil, palm oil, and particularly preferable ones. Palm oil. In addition, hydrogenated fats and oils (generally called hardened oils) in which hydrogen is added to the double bonds of fatty acids in the fats and oils to improve oxidation and thermal stability can also be used as vegetable fats and oils in the present invention. These are used individually or in mixture of 2 or more types.
In the impregnated bearing oil of the present invention, the content of vegetable oil is preferably 0.01 to 10.0% by mass, more preferably 0.05 to 5.0% by mass. If it is less than 0.01% by mass, the effect of addition is not sufficient, and if it exceeds 10.0% by mass, the viscosity tends to increase rapidly.

本発明において使用する銅腐食防止剤は、焼結軸受材に含まれる銅成分に選択的に吸着する添加剤として作用するものである。銅腐食防止剤としてはベンゾトリアゾール及びその誘導体、ベンゾイミダゾール及びその誘導体、アルキルジチオベンゾイミダゾール及びその誘導体などが挙げられる。これらは、銅や銅合金表面上で、選択的に緻密な重合皮膜を形成しこれが潤滑膜となって摩耗を抑制すると考えられる。中でもベンゾトリアゾール誘導体は、イオウを含んでおらず特に好ましい。具体例としては、城北化学工業製 BT-LX、TB-GL、チバ・スペシャルティ・ケミカルズ社製 Irgmet30, Irgamet39等が挙げられる。これらは、単独または二種類以上混合して用いられる。
本発明の含浸軸受油中、銅腐食防止剤の含有量は、好ましくは0.01〜5.0質量%、さらに好ましくは0.05〜2.0質量%である。0.01質量%未満では添加効果が充分でなく、5.0質量%を超えると沈殿物が生成する傾向がある。
The copper corrosion inhibitor used in the present invention acts as an additive that selectively adsorbs to the copper component contained in the sintered bearing material. Examples of the copper corrosion inhibitor include benzotriazole and derivatives thereof, benzimidazole and derivatives thereof, and alkyldithiobenzimidazole and derivatives thereof. These are considered to selectively form a dense polymer film on the surface of copper or copper alloy, which acts as a lubricating film to suppress wear. Of these, benzotriazole derivatives are particularly preferred because they do not contain sulfur. Specific examples include BT-LX and TB-GL manufactured by Johoku Chemical Industry Co., Ltd. and Irgmet30, Irgamet39 manufactured by Ciba Specialty Chemicals. These are used individually or in mixture of 2 or more types.
In the impregnated bearing oil of the present invention, the content of the copper corrosion inhibitor is preferably 0.01 to 5.0 mass%, more preferably 0.05 to 2.0 mass%. If it is less than 0.01% by mass, the effect of addition is not sufficient, and if it exceeds 5.0% by mass, a precipitate tends to be formed.

本発明の含浸軸受油にはさらに、含浸軸受油中に生成あるいは混入した劣化物の堆積を防止または抑制するための洗浄分散剤を含有させることが望ましい。このような洗浄分散剤としては、無灰型としてコハク酸イミド及びその誘導体及び金属型として金属スルホネート、金属フェネート及び金属サリシレートが挙げられる。特にカルシウムサリシレートは分子中にフェノール基を持ち酸化防止性能を有するとともに、直鎖のアルキル基を親油基としているため摩擦力を低減する効果が大きく好ましい。カルシウムサリシレートの例としては、オスカ化学製 OSCA438B、インフィニアム製 C7101等が挙げられる。これらは、単独または二種類以上混合して用いられる。
本発明の含浸軸受油中、洗浄分散剤の含有量は、好ましくは0.01〜10.0質量%、さらに好ましくは0.5〜5.0質量%である。0.01質量%未満では添加効果が充分でなく、10.0質量%を超えると粘度が上昇する傾向がある。
It is desirable that the impregnated bearing oil of the present invention further contains a cleaning dispersant for preventing or suppressing the accumulation of deteriorated products generated or mixed in the impregnated bearing oil. Examples of such a cleaning dispersant include succinimide and derivatives thereof as an ashless type and metal sulfonate, metal phenate, and metal salicylate as a metal type. In particular, calcium salicylate is preferable because it has a phenol group in the molecule and has antioxidation performance, and also has a linear alkyl group as a lipophilic group, so that the effect of reducing frictional force is great. Examples of calcium salicylates include OSCA438B manufactured by Oska Chemical, C7101 manufactured by Infinium, and the like. These are used individually or in mixture of 2 or more types.
In the impregnated bearing oil of the present invention, the content of the cleaning dispersant is preferably 0.01 to 10.0% by mass, more preferably 0.5 to 5.0% by mass. If it is less than 0.01% by mass, the effect of addition is not sufficient, and if it exceeds 10.0% by mass, the viscosity tends to increase.

また本発明の含浸軸受油には、必要に応じて酸化防止剤を配合することができる。ここで用いられる酸化防止剤としては、アミン系酸化防止剤として、例えば、p−アルキル置換ジフェニルアミンやフェノール−α−ナフチルアミンが挙げられ、フェノール系酸化防止剤としては、例えば、2,6−ジターシャリーブチル−p−クレゾールが挙げられる。これらは、単独または二種類以上混合して用いられる。
本発明の含浸軸受油中、酸化防止剤の含有量は、好ましくは0.01〜5.0質量%、さらに好ましくは0.5〜3.0質量%である。0.01質量%未満では添加効果が充分でなく、5.0質量%を超えると沈殿物が生成する傾向がある。
Moreover, an antioxidant can be mix | blended with the impregnation bearing oil of this invention as needed. Examples of the antioxidant used herein include amine-based antioxidants such as p-alkyl-substituted diphenylamine and phenol-α-naphthylamine. Examples of the phenol-based antioxidant include 2,6-ditertiary. Butyl-p-cresol is mentioned. These are used individually or in mixture of 2 or more types.
In the impregnated bearing oil of the present invention, the content of the antioxidant is preferably 0.01 to 5.0 mass%, more preferably 0.5 to 3.0 mass%. If it is less than 0.01% by mass, the effect of addition is not sufficient, and if it exceeds 5.0% by mass, a precipitate tends to be formed.

本発明の含浸軸受油には、その性能を向上させるため防錆剤、粘度指数向上剤、流動点降下剤、消泡剤等の添加剤の1種または2種以上を適宜配合することも可能である。これらの添加剤は、通常含浸軸受油に対して好ましくは、0.01〜10質量%、さらに好ましくは、0.1〜5質量%添加される。   In order to improve the performance of the impregnated bearing oil of the present invention, one or more additives such as a rust inhibitor, a viscosity index improver, a pour point depressant and an antifoaming agent can be appropriately blended. It is. These additives are preferably added in an amount of preferably 0.01 to 10% by mass, more preferably 0.1 to 5% by mass, based on the impregnated bearing oil.

以下実施例を示し、本発明をさらに具体的に説明する。
実施例1〜4、比較例1〜7
表1及び2に示す成分を表1及び2に示す質量比率で混合し、含浸軸受油を製造した。比較例6及び7は市販の含浸軸受油である。使用した基油の動粘度及び蒸発減量、並びに含浸軸受油の摩擦係数及びこれを直流モータの軸受に使用し、その電流値を調べた。
Hereinafter, the present invention will be described more specifically with reference to examples.
Examples 1-4, Comparative Examples 1-7
The components shown in Tables 1 and 2 were mixed at the mass ratios shown in Tables 1 and 2 to produce impregnated bearing oil. Comparative Examples 6 and 7 are commercially available impregnated bearing oils. The kinematic viscosity and the evaporation loss of the used base oil, the friction coefficient of the impregnated bearing oil, and this were used for the bearing of the DC motor, and the current value thereof was examined.

動粘度
ウベローデ粘度計による、40℃における測定値である。
蒸発減量
試料油5gを20mlガラス瓶に秤量し、120℃の恒温槽に500時間静置した後、試料油質量を測定する。蒸発減量は、[(加熱前の試料質量−加熱後の試料質量)/加熱前の試料質量]×100(質量%)により算出した。
Kinematic viscosity It is a measured value at 40 ° C. by an Ubbelohde viscometer.
Evaporation loss 5 g of sample oil is weighed in a 20 ml glass bottle and left in a thermostatic bath at 120 ° C. for 500 hours, and then the mass of sample oil is measured. The evaporation loss was calculated by [(sample mass before heating−sample mass after heating) / sample mass before heating] × 100 (% by mass).

摩擦係数
往復動摩擦摩耗試験機(TE−77)を用いて評価した。試験方法を以下に示す。
テストピース ボール 直径17.5mm(SUJ−2)
プレート 直径11mm×厚み5mm(含浸材:鉄24〜68質量%、残りは銅、錫、亜鉛及び炭素からなる焼結合金)
試験条件 荷重 50N
周波数 1Hz
振幅 0.8mm
時間 5分
温度 25℃
測定項目 摩擦係数
Friction coefficient It evaluated using the reciprocating friction abrasion tester (TE-77). The test method is shown below.
Test piece ball diameter 17.5mm (SUJ-2)
Plate Diameter 11mm x Thickness 5mm (Impregnating material: Iron 24-68% by mass, the rest is sintered alloy consisting of copper, tin, zinc and carbon)
Test conditions Load 50N
1Hz frequency
Amplitude 0.8mm
5 minutes
Temperature 25 ° C
Measurement item Friction coefficient

電流値
実モータの回転時に発生する電流値を用いて評価した。すなわち、モータのシャフトの先に10g又は100gの分銅を吊り下げた状態にしてモータを回転させ、回転時に発生する電流値を測定した。測定条件を以下に示す。
使用モータ 直流モータ(松下モータ社製直流モータPNN13))
試験条件 回転数 10000 rpm
電圧 6V
時間 5分
試験油充填 ラジアル側含浸材(鉄24〜68質量%、残りは銅、錫、亜鉛及び炭素からなる焼結合金)に試験油を滴下し評価を開始した。
測定項目 電流値
結果を表1及び2に示す。










Current value An evaluation was made using the current value generated during rotation of the actual motor. That is, the motor was rotated with a 10 g or 100 g weight suspended from the tip of the motor shaft, and the current value generated during the rotation was measured. The measurement conditions are shown below.
Motor used DC motor (DC motor PNN13 manufactured by Matsushita Motor)
Test condition Rotation speed 10000 rpm
Voltage 6V
Time 5 minutes filled with test oil The test oil was dropped onto the radial side impregnated material (iron 24-68% by mass, the rest being a sintered alloy composed of copper, tin, zinc and carbon), and evaluation was started.
Measurement item Current value The results are shown in Tables 1 and 2.










Figure 2005179571
PAO4:100℃の動粘度が4mm2/sのポリ−α−オレフィン
PAO6:100℃の動粘度が6mm2/sのポリ−α−オレフィン
PAO10:100℃の動粘度が10mm2/sのポリ−α−オレフィン
ベンゾトリアゾール誘導体:城北化学工業株式会社性BT−LX


























Figure 2005179571
PAO4: Poly-α-olefin PAO6 having a kinematic viscosity at 100 ° C. of 4 mm 2 / s PAO6: Poly-α-olefin PAO10 having a kinematic viscosity at 100 ° C. of 6 mm 2 / s PAO10: Poly having a kinematic viscosity at 100 ° C. of 10 mm 2 / s -Α-olefin benzotriazole derivative: Johoku Chemical Industry Co., Ltd. BT-LX


























Figure 2005179571
Figure 2005179571

比較例6(市販品1):低粘度と中粘度ポリ−α−オレフィンの混合物を基油とし、酸化防止剤、銅腐食防止剤を含む含浸軸受油
比較例7(市販品2):ポリエステル油を基油とし、リン系の極圧剤、酸化防止剤を含む含浸軸受油
Comparative Example 6 (commercial product 1): Impregnated bearing oil containing a mixture of low viscosity and medium viscosity poly-α-olefin as a base oil and containing an antioxidant and a copper corrosion inhibitor Comparative example 7 (commercial product 2): Polyester oil Base oil, impregnated bearing oil containing phosphorus-based extreme pressure agent and antioxidant

実施例1〜4の含浸軸受油は、動粘度が低く、摩擦係数も低いため、モータでの電流値は低い値を示している。また蒸発減量が少ないため、長時間使用した場合の安定性にも優れている。
これに対して比較例1は、基油の粘度が低いため、蒸発減量が大きくなり長時間の安定性に劣る。
比較例2〜3は、蒸発減量は小さいが、添加剤を含んでいないため電流値が高い。
比較例4は、植物油脂の替わりに合成エステルを用いているため、摩擦係数が高い。
比較例5は、銅腐食防止剤を含んでいないため電流値が高い。
比較例6(市販品1)は、低粘度のPAOと中粘度のPAOの混合物を、比較例7(市販品2)は低粘度のポリエステルを使用しているため、実施例と比較して蒸発減量は大きく、また電流値も高い。
Since the impregnated bearing oils of Examples 1 to 4 have a low kinematic viscosity and a low coefficient of friction, the current value in the motor is low. Moreover, since the evaporation loss is small, the stability when used for a long time is also excellent.
On the other hand, in Comparative Example 1, since the viscosity of the base oil is low, the evaporation loss increases and the long-term stability is poor.
In Comparative Examples 2 to 3, although the evaporation loss is small, the current value is high because the additive is not included.
Since the comparative example 4 uses the synthetic ester instead of vegetable fats and oils, a friction coefficient is high.
Since the comparative example 5 does not contain a copper corrosion inhibitor, the current value is high.
Comparative Example 6 (commercial product 1) uses a mixture of low-viscosity PAO and medium-viscosity PAO, and Comparative Example 7 (commercial product 2) uses low-viscosity polyester. The weight loss is large and the current value is high.

Claims (12)

基油、植物油脂及び銅腐食防止剤を含有する含浸軸受油。   Impregnated bearing oil containing base oil, vegetable oil and copper corrosion inhibitor. さらに清浄分散剤を含む請求項1記載の含浸軸受油。   The impregnated bearing oil according to claim 1, further comprising a cleaning dispersant. 基油がポリ−α−オレフィンである請求項1又は2記載の含浸軸受油。   The impregnated bearing oil according to claim 1 or 2, wherein the base oil is a poly-α-olefin. 基油の粘度が、40℃で20〜50mm2/sである請求項1〜3のいずれか1項記載の含浸軸受油。 The viscosity of the base oil is, 40 ° C. at 20 to 50 mm 2 / s impregnation bearing oil according to any one of claims 1 to 3. 銅腐食防止剤が、ベンゾトリアゾール誘導体である請求項1〜4のいずれか1項記載の含浸軸受油。   The impregnated bearing oil according to any one of claims 1 to 4, wherein the copper corrosion inhibitor is a benzotriazole derivative. 植物油脂の配合量が0.01〜5.0質量%である請求項1〜5のいずれか1項記載の含浸軸受油。   The impregnated bearing oil according to any one of claims 1 to 5, wherein the amount of the vegetable oil / fat is 0.01 to 5.0% by mass. 銅腐食防止剤の配合量が0.01〜5.0質量%である請求項1〜6のいずれか1項記載の含浸軸受油。   The impregnated bearing oil according to any one of claims 1 to 6, wherein a compounding amount of the copper corrosion inhibitor is 0.01 to 5.0 mass%. 洗浄分散剤が金属サリシレートである請求項2〜7のいずれか1項記載の含浸軸受油。   The impregnated bearing oil according to any one of claims 2 to 7, wherein the cleaning dispersant is a metal salicylate. 洗浄分散剤の配合量が0.01〜10.0質量%である請求項2〜8のいずれか1項記戴の含浸軸受油。   The impregnated bearing oil according to any one of claims 2 to 8, wherein the blending amount of the cleaning dispersant is 0.01 to 10.0% by mass. 請求項1〜9のいずれか1項記載の含浸軸受油を含浸させた含浸軸受。   An impregnated bearing impregnated with the impregnated bearing oil according to claim 1. モータ用焼結含浸軸受である請求項10記載の含浸軸受。   The impregnated bearing according to claim 10, which is a sintered impregnated bearing for a motor. モータ用焼結含浸軸受、又はモータ接点の摺動潤滑に用いる請求項1〜9のいずれか1項記載の含浸軸受油の使用。   Use of the impregnated bearing oil according to any one of claims 1 to 9, wherein the oil is used for motor-impregnated sintered impregnated bearings or sliding lubrication of motor contacts.
JP2003424787A 2003-12-22 2003-12-22 Impregnation bearing oil and bearing impregnated therewith Pending JP2005179571A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018109445A (en) * 2018-03-02 2018-07-12 Ntn株式会社 Sintered bearing
JP2019157034A (en) * 2018-03-15 2019-09-19 Jxtgエネルギー株式会社 Additive for friction adjustment, and lubricating oil composition
US10907685B2 (en) 2013-10-03 2021-02-02 Ntn Corporation Sintered bearing and manufacturing process therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10907685B2 (en) 2013-10-03 2021-02-02 Ntn Corporation Sintered bearing and manufacturing process therefor
JP2018109445A (en) * 2018-03-02 2018-07-12 Ntn株式会社 Sintered bearing
JP2019157034A (en) * 2018-03-15 2019-09-19 Jxtgエネルギー株式会社 Additive for friction adjustment, and lubricating oil composition

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