JPH03250094A - Grease-filled gearing for electrical equipment and auxiliary machinery of vehicle - Google Patents
Grease-filled gearing for electrical equipment and auxiliary machinery of vehicleInfo
- Publication number
- JPH03250094A JPH03250094A JP4868190A JP4868190A JPH03250094A JP H03250094 A JPH03250094 A JP H03250094A JP 4868190 A JP4868190 A JP 4868190A JP 4868190 A JP4868190 A JP 4868190A JP H03250094 A JPH03250094 A JP H03250094A
- Authority
- JP
- Japan
- Prior art keywords
- grease
- filled
- oil
- electrical equipment
- gearing
- 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.)
- Pending
Links
- 239000004519 grease Substances 0.000 title claims abstract description 23
- 239000003921 oil Substances 0.000 claims abstract description 12
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002199 base oil Substances 0.000 claims abstract description 10
- 239000001257 hydrogen Substances 0.000 abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- -1 alkyl diphenyl ether Chemical compound 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 125000003118 aryl group Chemical group 0.000 description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 5
- 229920002396 Polyurea Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004711 α-olefin Substances 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001336 alkenes Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Lubricants (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、特に自動車用電装部品・補機（たとえば、
オルタネータ、ｉｆ磁クラッチ、アイドラブーりなど）
でエンジンの振動を受ける場所に使用するグリース封入
軸受に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention is particularly applicable to automobile electrical parts and auxiliary equipment (for example,
(alternator, IF magnetic clutch, idler boolean, etc.)
This product relates to grease-filled bearings used in areas subject to engine vibration.
〔従来の技術］
従来、自動車用電装部品・補機の技術は、小型、軽量化
の方向に急速な進展をしつつある。それは、静粛性向上
の強い要望によってエンジンルームの密閉化が進み、エ
ンジンルーム内の高温化が促進される一方で、電装部品
・補機自体の高性能、高出力のものがますます求められ
ており、より一層高温に耐える仕様の部品が必要になっ
て来たからである。[Prior Art] Conventionally, the technology of electrical components and auxiliary equipment for automobiles has been rapidly progressing in the direction of smaller size and lighter weight. This is due to the strong demand for improved quietness, which has led to more sealed engine compartments and increased temperatures within the engine compartment, while demand for higher performance and higher output electrical components and auxiliary equipment has increased. This is because parts with specifications that can withstand even higher temperatures have become necessary.
このような自動車用電装部品・補機に使用される軸受は
、グリースを封入した密封軸受であって、転がり疲れに
よる剥離寿命に対して軸受封入グリスの［グリース寿命
Ｊは這に短いことから、軸受の耐久寿命は、封入グリー
スの寿命によって決定されることになり、より高温長寿
命型のグリースの開発が必要になって来た。したがって
、従来広く使用されて来た金属石鹸系のグリースを始め
とし、ポリウレア・鉱油系、ポリウレア・エステル系お
よびポリウレア・αオレフイン系のグリースはいずれも
軸受寿命等の性能面において必ずしも要望を充分に満た
すものとは言えなくなった。Bearings used in such automotive electrical components and auxiliary equipment are sealed bearings filled with grease. The durable life of a bearing is determined by the life of the enclosed grease, and it has become necessary to develop a grease with a longer life at higher temperatures. Therefore, starting with the metallic soap-based greases that have been widely used in the past, polyurea/mineral oil based, polyurea/ester based, and polyurea/α-olefin based greases do not always meet the requirements in terms of performance such as bearing life. It can no longer be said to be fulfilling.
この発明者らは、密封軸受の寿命が単なる転がり疲れに
よる剥離寿命よりも遥かに短い原因を詳細に検討した結
果、振動および雰囲気が高温になった時点でグリースが
分解し、遊離水素が鋼の組織内に侵入して水素脆化の現
象を起こすことが判明した。そこで、この発明の出願人
は密封軸受の耐久寿命を延ばすために、鋼組織の表面に
予め薄い酸化被膜を形成する技術、および、鋼組織表面
に対して不動態化を起こさせる酸化剤をグリースに添加
する技術を既に開示した。The inventors investigated in detail the reason why the lifespan of sealed bearings is much shorter than the lifespan of peeling due to simple rolling fatigue.The inventors found that the grease decomposes when vibrations and the atmosphere become high temperature, and free hydrogen is released into the steel. It was found that hydrogen penetrates into tissues and causes the phenomenon of hydrogen embrittlement. Therefore, in order to extend the durable life of sealed bearings, the applicant of the present invention developed a technology to form a thin oxide film on the surface of the steel structure in advance, and added an oxidizing agent that causes passivation to the surface of the steel structure to the grease. We have already disclosed a technique for adding
［発明が解決しようとする課Ｂ］
以上述べたように、従来の技術においては、グリースか
らの水素の発生を極力抑制し、密封軸受の耐久寿命の延
長を図るための技術は未だ不充分であるという問題点が
あり、これを解決することが課題であった。[Problem B to be solved by the invention] As stated above, the conventional technology is still insufficient to suppress the generation of hydrogen from grease as much as possible and extend the durable life of sealed bearings. There were some problems, and the challenge was to solve them.
上記の課題を解決するために、この発明は、グリース全
体の約８０重量％を占める基油に、芳香族環が酸素原子
によって結合されているフェニルエーテル系合成油を用
いたグリースを封入した軸受とする手段を採用したもの
である。以下その詳細を述べる。In order to solve the above problems, the present invention has developed a bearing in which a base oil, which accounts for about 80% by weight of the entire grease, is filled with a phenyl ether synthetic oil in which aromatic rings are bonded by oxygen atoms. This method adopted the method of The details will be described below.
まず、この発明におけるフェニルエーテル系合成油とは
、たとえば包括的につぎの一般式％式％
たは１、ｎは０、ｌまたは２の各整数、Ｒは直鎖のアル
キル基］
で表わされるような芳香族環を酸素原子で結合した単一
物もしくは混合物で、通常芳香族環の数が少ないほど、
またアルキル基の数または側鎖が多いほど流動点は低く
なるので、この発明においては耐熱性がよいという点か
ら流動点の高いものが好ましいが、環数が多くなり分子
量が大きくなり過ぎると粘度指数が過大となり、好まし
くなくなる。したがって、異種のフェニルエーテルを二
つ以上混合し、粘度、耐熱性等の諸性質を適宜調整する
ことが望ましい。First, the phenyl ether-based synthetic oil in this invention is, for example, comprehensively represented by the following general formula: A single substance or a mixture of aromatic rings bonded with oxygen atoms, such as
In addition, the greater the number of alkyl groups or side chains, the lower the pour point, so in this invention, those with a high pour point are preferred in terms of good heat resistance, but if the number of rings increases and the molecular weight becomes too large, the viscosity will decrease. The index becomes excessive and becomes undesirable. Therefore, it is desirable to mix two or more different types of phenyl ethers and adjust various properties such as viscosity and heat resistance as appropriate.
つぎに、この発明における増稠剤は従来広く用いられて
いる脂肪族ウレアでも脂環族ウレアでも支障なく使用で
きるが、中でも芳香族ウレアは最も好ましいものとして
推奨することができる。Next, as the thickening agent in the present invention, aliphatic urea or alicyclic urea, which have been widely used in the past, can be used without any problem, but aromatic urea can be recommended as the most preferable among them.
さらに、この発明において、目的を阻害しない範囲内で
感化剤を付加してもよい、ただし、従来軸受の防錆剤と
して使用されているスルホネート（たとえばバリウムス
ルホネート）は３重量％以下の添加ならば大きい影響は
認められないが、３重量％を越える多量の添加は好まし
くない、なぜなら、吸着性の強いバリウムスルホネート
は、金属新生面に吸着し、水素分解の触媒として作用す
るからである。Furthermore, in the present invention, a sensitizing agent may be added within a range that does not impede the purpose. However, if a sulfonate (for example, barium sulfonate) conventionally used as a rust preventive agent for bearings is added in an amount of 3% by weight or less, Although no major influence is observed, addition of a large amount exceeding 3% by weight is not preferable because barium sulfonate, which has strong adsorption properties, is adsorbed on the new metal surface and acts as a catalyst for hydrogen decomposition.
このようなフェニルエーテル型合成油、増稠剤および必
要に応じて適宜加える添加剤とからグリースを製造する
にあたっては通常の方法を用いればよく、特に限定され
るものではない。Grease can be produced from such a phenyl ether type synthetic oil, a thickener, and additives added as appropriate, by any conventional method, and is not particularly limited.
自動車用電装部品・補機に用いられた軸受用グリースの
基油、すなわち、鉱油、エステルおよびαオレフィンは
いずれも熱安定性に劣る。これらを構成する原子間の結
合エネルギーの大きさの順、すなわち
１ １１
＝Ｃ−Ｈ＞ −Ｃ−Ｈ＞ −Ｃ−Ｃに示されるよう
に、αオレインの炭素・炭素結合が最も小さく、ついで
αオレフィンの炭素・水素結合、さらにベンゼン核の炭
素・水素結合と順次大きくなり、芳香族環の炭素・炭素
結合エネルギーは前記の三つの結合エネルギーよりも更
に大きいので、この発明で用いる芳香族環は前王者に比
べて最も安定であり、芳香族環の炭素に結合した水素は
オレフィン鎖の炭素に結合した水素よりも分解されにく
く安定していることになる。したがって、綱の組織に侵
入して水素脆性の現象を起こす水素の発生を出来るだけ
抑制するためには、フェニルエーテル系の合成油が従来
の基油よりも遥かに有利であるといえる。The base oils of bearing greases used in automotive electrical parts and auxiliary equipment, namely mineral oils, esters, and α-olefins, all have poor thermal stability. As shown in the order of the bond energies between the atoms constituting these, 1 11 =C-H>-C-H> -C-C, the carbon-carbon bond in α-olein is the smallest, followed by The carbon-hydrogen bond of the α-olefin and the carbon-hydrogen bond of the benzene nucleus become larger sequentially, and the carbon-carbon bond energy of the aromatic ring is even larger than the above three bond energies, so the aromatic ring used in this invention is the most stable compared to the former champion, meaning that hydrogen bonded to the carbon of the aromatic ring is more stable and less susceptible to decomposition than the hydrogen bonded to the carbon of the olefin chain. Therefore, it can be said that phenyl ether-based synthetic oils are far more advantageous than conventional base oils in order to suppress as much as possible the generation of hydrogen that invades the structure of the steel and causes the phenomenon of hydrogen embrittlement.
（実施例〕
この発明におけるフェニルエーテル系合成油として、松
材石油社製；アルキルジフェニルエーテルを選びこれを
基油とし、増稠剤としてポリウレア（２０重量％）、お
よび防錆剤として亜硝酸ソーダ（０，５重量％）または
バリウムスルホネート（２重量％）を添加したグリース
（それぞれを試料グリース■および試料グリース■と呼
ぶ）を調製した。(Example) As the phenyl ether-based synthetic oil in this invention, alkyldiphenyl ether manufactured by Matsuzai Sekiyu Co., Ltd. was selected as the base oil, polyurea (20% by weight) was used as a thickener, and sodium nitrite (20% by weight) was used as a rust preventive agent. 0.5% by weight) or barium sulfonate (2% by weight) (referred to as Sample Grease ■ and Sample Grease ■, respectively) were prepared.
一方、対照品として、エステル系合成油を基油としバリ
ウムスルホネートを添加した従来のグリース（対照グリ
ースＩと呼ぶ）、αオレフイン系油を基油とし、アミン
化合物を添加した従来のグリース（対照グリース■と呼
ぶ）および鉱油を基油とし、亜硝酸ソーダを添加した従
来のグリース（対照グリース■と呼ぶ）を選び、下記条
件のもとに軸受の寿命状Ｍ（各グリースに対する試験回
数ｎ−５）を行ない、得られた結果を表にまとめた。On the other hand, as control products, a conventional grease with an ester-based synthetic oil as the base oil and the addition of barium sulfonate (referred to as Control Grease I), a conventional grease with an α-olefin oil as the base oil and the addition of an amine compound (control grease) (referred to as ■) and a conventional grease with mineral oil as a base oil and sodium nitrite added (referred to as control grease ), and the results are summarized in the table.
記
試験軸受 ６３０３ ＬＬＩ＋雰囲気温度
４０°Ｃ
ヘルド張力 １６５ ｋｇｆ
内輪回転数 １５５００ ｒρ顛表から明らかな
ように、フェニルエーテル系合成油を用いた試料グリー
ス■および■は、従来の対照グリースＩ、■および■の
いずれよりも遥かに長い軸受寿命を示した。Test bearing 6303 LLI + ambient temperature
40°C Held tension 165 kgf Inner ring rotation speed 15500 rρ As is clear from the table, the sample greases ■ and ■ using phenyl ether synthetic oil are far more effective than the conventional control greases I, ■, and ■. It showed a long bearing life.
表
〔効果〕
以上述べたように、フェニルエーテル系合成油を基油と
したグリースを封入したこの発明の軸受は、水素脆性に
起因する異常剥離を大幅に抑制し、軸受寿命を著しく延
長させることができる。したがって、この発明は過酷な
使用条件下にある自動車用電装部品、補機等に使用され
る軸受に対する最近の強い要望に充分対応しうるちであ
るといえる。Table [Effects] As described above, the bearing of the present invention, which is filled with grease based on phenyl ether-based synthetic oil, significantly suppresses abnormal peeling caused by hydrogen embrittlement and significantly extends the bearing life. I can do it. Therefore, it can be said that the present invention satisfactorily meets the recent strong demand for bearings used in automobile electrical components, auxiliary equipment, etc., which are used under severe operating conditions.
Claims (1)
成油であることを特徴とする車両の電装・補機用グリー
ス封入軸受。(1) A grease-filled bearing for vehicle electrical equipment and auxiliary equipment, characterized in that the base oil of the grease to be filled is phenyl ether-based synthetic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4868190A JPH03250094A (en) | 1990-02-28 | 1990-02-28 | Grease-filled gearing for electrical equipment and auxiliary machinery of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4868190A JPH03250094A (en) | 1990-02-28 | 1990-02-28 | Grease-filled gearing for electrical equipment and auxiliary machinery of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03250094A true JPH03250094A (en) | 1991-11-07 |
Family
ID=12810063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4868190A Pending JPH03250094A (en) | 1990-02-28 | 1990-02-28 | Grease-filled gearing for electrical equipment and auxiliary machinery of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03250094A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05263091A (en) * | 1992-01-22 | 1993-10-12 | Ntn Corp | Greased rolling bearing for alternator |
| US5282689A (en) * | 1991-09-20 | 1994-02-01 | Nsk Ltd. | Rolling bearing |
| US5385412A (en) * | 1991-09-20 | 1995-01-31 | Nsk Ltd. | Rolling bearing |
| US5498357A (en) * | 1991-10-04 | 1996-03-12 | Nsk Ltd. | Grease composition for high-temperature, high-speed and high-load bearings |
| US5707944A (en) * | 1994-10-17 | 1998-01-13 | Nsk Ltd. | Grease composition |
| WO2007114135A1 (en) | 2006-03-29 | 2007-10-11 | Kyodo Yushi Co., Ltd. | Lubricant composition |
| JP2009120956A (en) * | 2001-07-17 | 2009-06-04 | Nsk Ltd | Roller bearing |
| WO2009093685A1 (en) | 2008-01-23 | 2009-07-30 | Kyodo Yushi Co., Ltd. | Lubricating agent composition and mechanical member |
| WO2014065399A1 (en) | 2012-10-26 | 2014-05-01 | 協同油脂株式会社 | Grease composition |
| WO2015016376A1 (en) | 2013-08-02 | 2015-02-05 | 協同油脂株式会社 | Grease composition |
| EP3666860A1 (en) | 2018-11-06 | 2020-06-17 | Kyodo Yushi Co., Ltd. | Anti-flaking agent and lubricant composition comprising the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01259097A (en) * | 1988-04-08 | 1989-10-16 | Kyodo Yushi Kk | Grease composition having long life at high temperature |
-
1990
- 1990-02-28 JP JP4868190A patent/JPH03250094A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01259097A (en) * | 1988-04-08 | 1989-10-16 | Kyodo Yushi Kk | Grease composition having long life at high temperature |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5282689A (en) * | 1991-09-20 | 1994-02-01 | Nsk Ltd. | Rolling bearing |
| US5385412A (en) * | 1991-09-20 | 1995-01-31 | Nsk Ltd. | Rolling bearing |
| US5498357A (en) * | 1991-10-04 | 1996-03-12 | Nsk Ltd. | Grease composition for high-temperature, high-speed and high-load bearings |
| JPH05263091A (en) * | 1992-01-22 | 1993-10-12 | Ntn Corp | Greased rolling bearing for alternator |
| US5707944A (en) * | 1994-10-17 | 1998-01-13 | Nsk Ltd. | Grease composition |
| JP2009120956A (en) * | 2001-07-17 | 2009-06-04 | Nsk Ltd | Roller bearing |
| WO2007114135A1 (en) | 2006-03-29 | 2007-10-11 | Kyodo Yushi Co., Ltd. | Lubricant composition |
| US9376644B2 (en) | 2006-03-29 | 2016-06-28 | Kyodo Yushi Co., Ltd. | Lubricant composition |
| WO2009093685A1 (en) | 2008-01-23 | 2009-07-30 | Kyodo Yushi Co., Ltd. | Lubricating agent composition and mechanical member |
| US9528073B2 (en) | 2008-01-23 | 2016-12-27 | Kyodo Yushi Co., Ltd. | Lubricant composition and mechanical member |
| WO2014065399A1 (en) | 2012-10-26 | 2014-05-01 | 協同油脂株式会社 | Grease composition |
| US9719045B2 (en) | 2012-10-26 | 2017-08-01 | Kyodo Yushi Co., Ltd. | Grease composition |
| WO2015016376A1 (en) | 2013-08-02 | 2015-02-05 | 協同油脂株式会社 | Grease composition |
| US10077411B2 (en) | 2013-08-02 | 2018-09-18 | Kyodo Yushi Co., Ltd. | Grease composition |
| EP3666860A1 (en) | 2018-11-06 | 2020-06-17 | Kyodo Yushi Co., Ltd. | Anti-flaking agent and lubricant composition comprising the same |
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