JPH02294394A - Lubricant agent for electric contact - Google Patents
Lubricant agent for electric contactInfo
- Publication number
- JPH02294394A JPH02294394A JP11468389A JP11468389A JPH02294394A JP H02294394 A JPH02294394 A JP H02294394A JP 11468389 A JP11468389 A JP 11468389A JP 11468389 A JP11468389 A JP 11468389A JP H02294394 A JPH02294394 A JP H02294394A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- lubricant
- contacts
- voltage drop
- current
- 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
- 239000000314 lubricant Substances 0.000 title claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000004264 Petrolatum Substances 0.000 abstract description 10
- 229940066842 petrolatum Drugs 0.000 abstract description 10
- 235000019271 petrolatum Nutrition 0.000 abstract description 10
- 239000003921 oil Substances 0.000 abstract description 9
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000002480 mineral oil Substances 0.000 abstract description 3
- 235000010446 mineral oil Nutrition 0.000 abstract description 3
- 229940060184 oil ingredients Drugs 0.000 abstract description 3
- 229910018883 Pt—Cu Inorganic materials 0.000 abstract description 2
- 229910052763 palladium Inorganic materials 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 229940099259 vaseline Drugs 0.000 abstract 2
- 229910017770 Cu—Ag Inorganic materials 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 20
- 230000007423 decrease Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000004519 grease Substances 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920002545 silicone oil Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005610 quantum mechanics Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Landscapes
- Lubricants (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、自動車電装部品・マイクロモータ・可変抵抗
器などに内蔵された電気接点に塗布して使用する潤滑剤
に関する．
〔従来の技術〕
上記の電気接点は、金属または複合材（金属と非鉄金属
とから成る）を接点材料として用いている．従って、こ
れらを用いた電気接点は一般に乾燥状態で使用されるこ
とが多いが、接点の摩耗を防ぐためグリース・油等の潤
滑荊をその電気接点に塗布する場合がある．
〔発明が解決しようとする課題〕
しかし、上記従来の潤滑剤は鉱物系または合成油系グリ
ースであり、これを静止状態の電気接点に使用した場合
の電気接触抵抗は２０ｍΩ以上、摺動状態の場合は１Ω
以上とかなり大きな値を示すため、使用しにくいという
問題がある．そこで、本発明者は以下の分析を行った。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lubricant that is applied to electrical contacts built into automobile electrical components, micromotors, variable resistors, etc. [Prior Art] The above electrical contacts use metal or a composite material (consisting of metal and non-ferrous metal) as the contact material. Therefore, electrical contacts using these materials are generally used in a dry state, but in order to prevent contact wear, a lubricant such as grease or oil may be applied to the electrical contacts. [Problems to be Solved by the Invention] However, the conventional lubricants mentioned above are mineral-based or synthetic oil-based greases, and when used for electrical contacts in a stationary state, the electrical contact resistance is 20 mΩ or more, and the electrical contact resistance in a sliding state is 20 mΩ or more. 1Ω if
The problem is that it is difficult to use because it shows a fairly large value. Therefore, the present inventor conducted the following analysis.
即ち、電気接点に生ずる電気接触抵抗は固有抵抗・集中
抵抗・皮膜抵抗の和として表すことができる．固有抵抗
は接点の物質により定まった値を示すが、集中抵抗は接
点どうしの真実接触面（以下、ａ−スポットという．）
の直径に逆比例し、また、皮膜抵抗はａ−スポットの直
径の２乗に逆比例するものである．従って、ａ−スポッ
トの直径を増大するか、またはａ−スポット数を増やせ
ば集中抵抗・皮膜抵抗が小さくなって電気接触抵抗は減
少することとなる．
他方、量子力学の立場からすれば、金属表面では電子が
数人まではみ出していると考えられるから、金属どうし
が電界下においてローの桁に近づくと非接触であっても
トンネル電流と呼ばれる電流が金属間に流れる．従って
金属超微粉末が均一分敗した空間にこの原理を応用すれ
ば、互いに離れた２つの金属間においても、ｎｍの間隙
で分布する多数の金属超微粉末を介して電流が流れると
考えられる．
本発明は上記に鑑みて提案されたもので、従来の潤滑剤
がもつ問題点を解決することを目的とする．
〔課題を解決するための手段〕
本発明は、潤滑剤に導電性超微粉末が分散されているこ
とを特徴とする電気接点用潤滑剤である。In other words, the electrical contact resistance that occurs at an electrical contact can be expressed as the sum of specific resistance, lumped resistance, and film resistance. Specific resistance shows a value determined by the material of the contact, but lumped resistance shows the true contact surface between contacts (hereinafter referred to as the a-spot).
The film resistance is inversely proportional to the square of the diameter of the a-spot. Therefore, if the diameter of the a-spot is increased or the number of a-spots is increased, the lumped resistance and film resistance become smaller, and the electrical contact resistance decreases. On the other hand, from the standpoint of quantum mechanics, it is thought that up to a few electrons protrude from the surface of a metal, so when two metals approach the low order of magnitude under an electric field, a current called tunneling current occurs even though they are not in contact with each other. Flows between metals. Therefore, if this principle is applied to a space in which ultrafine metal powder is uniformly separated, it is thought that even between two metals separated from each other, a current will flow through a large number of ultrafine metal powders distributed with nanometer gaps. ．． The present invention was proposed in view of the above, and aims to solve the problems associated with conventional lubricants. [Means for Solving the Problems] The present invention is a lubricant for electrical contacts, characterized in that the lubricant contains conductive ultrafine powder dispersed therein.
電気接点に導電性超微粉末が分散されている潤滑剤を塗
布すると、電流は潤滑剤内の導電性超微粉末を次々と伝
わっていくことにより、一方の接点から他方の接点へと
流れる．
従って、電気接点が接触している場合はａ−スポットが
見掛け上増大することになり、非接触の場合は導電性超
微粉末を介して、接点間をｔ流が流れる．
〔実施例〕
以下、本発明の潤滑剤を、（１）非接触状態にある電気
接点（以下、非接触接点という。）に使用した場合、（
２）接触状態にある電気接点（以下、接触接点という。When a lubricant in which conductive ultrafine powder is dispersed is applied to electrical contacts, current flows from one contact to the other by successively passing through the conductive ultrafine powder in the lubricant. Therefore, when the electrical contacts are in contact, the a-spot increases in appearance, and when they are not in contact, a t-flow flows between the contacts via the conductive ultrafine powder. [Example] Hereinafter, when the lubricant of the present invention is used for (1) electrical contacts in a non-contact state (hereinafter referred to as non-contact contacts), (
2) Electrical contacts in contact (hereinafter referred to as contact contacts).
）に使用した場合について図面を参照しながら説明する
．
第１図・第４図は、それぞれ非接触接点１・２、接触接
点１１・１２に本発明の電気接点用潤滑剤３を使用した
場合の原理図である．４は潤滑剤、５は導電性超微粉末
である。) will be explained with reference to the drawings. Figures 1 and 4 are diagrams of the principle when the electrical contact lubricant 3 of the present invention is used for non-contact contacts 1 and 2 and contact contacts 11 and 12, respectively. 4 is a lubricant, and 5 is a conductive ultrafine powder.
上記の潤滑剤４はシリコンオイルなどの合成油とワセリ
ンあるいはペトロラタムの混合剤、ホワイトオイルなど
の鉱油とワセリンあるいはペトロラタムの混合剤、合成
油あるいは鉱油と石けんの混合剤等があり、グリース状
あるいは液体状を問わない．
また、導電性超微粉末５は、Ａｇ， Ｐｄ， Ｃｕ，
Ａｕ、ＰｔＳＡｇ−Ｐｄ（１０ 〜３０χ）、Ｃｕ−八
ｇ（０〜ＩＯＯＸ）、゛Ａｕ−Ａｇ（θ〜１００χ）、
Ｐｔ−Ｃｕ （（１−１００χ）等があり、金属、非金
属または合金であってもよい。The above lubricant 4 includes a mixture of synthetic oil such as silicone oil and petrolatum or petrolatum, a mixture of mineral oil such as white oil and petrolatum or petrolatum, a mixture of synthetic oil or mineral oil and soap, etc., and is in the form of a grease or liquid. Regardless of the situation. Further, the conductive ultrafine powder 5 includes Ag, Pd, Cu,
Au, PtSAg-Pd (10~30χ), Cu-8g (0~IOOX), ゛Au-Ag (θ~100χ),
Pt-Cu ((1-100χ), etc., and may be a metal, a nonmetal, or an alloy.
まず、非接触接点の場合を第１図〜第３図について説明
する．第１図において、接点ｌ・２が静止の状態にある
場合は静止接点であり、接点１・２が相対運動をする場
合は摺動接点である．静止接点の場合、接点１と導電性
趨微粉末５との距離、導電性超微粉末５・５間の距離、
また導電性超微粉末５と接点２との距離がそれぞれナノ
メートル（ｎｍ）以内であれば、電流ｉは第１図に示す
ように超微粉末５から超微粉末５へと次々と流れる（以
下、橋渡リするという。）ことにより、接点ｌから接点
２へと流れる。First, the case of non-contact contacts will be explained with reference to FIGS. 1 to 3. In Fig. 1, when contacts 1 and 2 are stationary, they are stationary contacts, and when contacts 1 and 2 move relative to each other, they are sliding contacts. In the case of a stationary contact, the distance between the contact 1 and the conductive ultrafine powder 5, the distance between the conductive ultrafine powders 5 and 5,
Furthermore, if the distance between the conductive ultrafine powder 5 and the contact point 2 is within nanometers (nm), the current i flows from one ultrafine powder to another in sequence as shown in FIG. (hereinafter referred to as bridging), the current flows from contact 1 to contact 2.
摺動接点の場合、一般に摺動速度は電流の流れる速度に
比べると極めて小さいから無視できる。In the case of sliding contacts, the sliding speed is generally extremely small compared to the current flow speed and can therefore be ignored.
従って、摺動接点の通電状況も上述の静止接点に対応し
て考えることができる．
第２図は、第１図の場合における静止（Ａ） ・摺勤
（Ｂ）の各接点について接触電圧降下と電流との関係を
示したグラフである．ここで、電気接点として銅平板と
鋼球とを用い、接点間隔は０．Ｏｌ１である．潤滑剤に
はシリコンオイル（１０ｃｃ）とワセリン（１ｇ）に平
均粒径１００ ｎｍの八ｇ−１０χＰｄ超微粉末（ｌｍ
ｇ）を混入分敵させたものを使用した．摺動接点の場合
の摺動速度はＩＯＮＩ１／秒である。Therefore, the energization status of sliding contacts can be considered corresponding to the above-mentioned stationary contacts. Figure 2 is a graph showing the relationship between contact voltage drop and current for each of the static (A) and sliding (B) contacts in the case of Figure 1. Here, a copper flat plate and a steel ball are used as electrical contacts, and the contact spacing is 0. It is Ol1. The lubricant was silicone oil (10cc), petrolatum (1g), and 8g-10χ Pd ultrafine powder (lm) with an average particle size of 100 nm.
A mixture of g) was used. The sliding speed for sliding contacts is IONI 1/sec.
静止接点の場合（Ａ）、接触電圧降下は０．５Ａで約０
．２Ｖであるが電流の減少に伴って急激に減少し、０．
０５Ａ以下では０、言いかえれば、接触抵抗Ｏの金属内
通電状態に対応した様相を呈する。In the case of stationary contacts (A), the contact voltage drop is approximately 0 at 0.5A.
．． 2V, but as the current decreases, it rapidly decreases to 0.
Below 05 A, the contact resistance is 0, in other words, it exhibits an aspect corresponding to the state of conduction in the metal with a contact resistance of O.
摺動接点の場合（Ｂ）、接触電圧降下は０．５Ａで約０
．６■であり、電流の減少に伴って小さくなり、０．Ｏ
ＩＡで０．４■となる。接触電圧降下はいずれの電流に
おいても静止状態より大きい．電流の増加に伴って接触
電圧降下が増大する理由として次のことが考えられる．
一般にｎｓの桁で離れた金属粉末間に流れるトンネル電
流ｉは、粉末間の電圧降下■、粉末間隙Ｚｉとすれば次
式で表すことができる。In the case of sliding contacts (B), the contact voltage drop is approximately 0 at 0.5A.
．． 6■, which decreases as the current decreases and becomes 0. O
IA is 0.4 ■. The contact voltage drop is larger than the static state at any current. The following are possible reasons why the contact voltage drop increases as the current increases. In general, the tunnel current i that flows between metal powders separated by an order of ns can be expressed by the following equation, assuming that the voltage drop between the powders is {circle around (2)} and the powder gap is Zi.
． Ｖ
ｌミα汀ｅｘρ（一βＺｉ）
α、βは定数
従って、Ｅｌが種々のＺｉで分布する多数の金属粉末間
を流れる場合、接触電圧降下は電流の増大に伴って大き
くなる．潤滑剤が金属の摺動に伴って動くから、潤滑剤
内部に分散する金属超微粉末の間隔も時々刻々変化する
。このため、摺動時の電流の橋渡り現象は静止時に比べ
て不安定であり、摺動時の接触抵抗は静止時に比べて大
きくなるものと考えられる．
第３図は、導電性超微粉末として平均粒径４０ナノメー
トル（ｎｓ＋）の銅超微粉末を使用した潤滑剤の例であ
り、他の条件は第２図の場合と同じである。．． V lmiα汀exρ(-βZi) α,β are constants Therefore, when El flows between a large number of metal powders distributed with various Zi, the contact voltage drop increases as the current increases. Since the lubricant moves as the metal slides, the distance between the ultrafine metal powders dispersed inside the lubricant also changes from time to time. For this reason, the current bridging phenomenon during sliding is less stable than when it is stationary, and the contact resistance during sliding is thought to be greater than when it is stationary. FIG. 3 is an example of a lubricant using ultrafine copper powder with an average particle size of 40 nanometers (ns+) as the conductive ultrafine powder, and other conditions are the same as in FIG. 2.
次に、接触接点の場合を第４図〜第７図について説明す
る。第４図において、接点１ｌ・接点１２が静止してい
る場合は静止接点、摺動している場合は摺動接点である
。接点１１と接点１２のａスポノトの直径をｄゆとする
。Next, the case of contact points will be explained with reference to FIGS. 4 to 7. In FIG. 4, when the contacts 1l and 12 are stationary, they are stationary contacts, and when they are sliding, they are sliding contacts. Let d be the diameter of the a-points of contacts 11 and 12.
本発明の潤滑剤３を使用した場合、電ＶＪＬｉはａ一ス
ポットのみを流れるばかりでなく導電性超微粉末５を橋
渡リすることも考慮てきるから、見掛け上のａ−スポッ
トの直径はｄ （＞ｄ． ）であると考えられる．従っ
て、潤滑剤３内の導電性超微粉末５は接触抵抗を減少さ
せるために著しく寄与する．
第５図・第６図は静止接点に、第７図は摺動接点に、■
潤滑剤を使用しない場合（Ｄ）、■シリコンオイル（ｌ
ｏｃｃ）とワセリン（１ｇ）を混合した潤滑剤を使用し
た場合（Ｅ）、■シリコンオイル（１０ｃＣ）とワセリ
ン（１ｇ）にＡｇ−１０ＸＰｄ超微粉末（ｌｍｇ）を混
入させた本発明の潤滑剤を使用した場合ＣＦ）、の３通
りについて実験した結果を示す．なお接点１ｌは鋼球を
接点１２は銅板を用いた．第５図は、上記の状態におけ
る接触電圧降下と接触荷重との関係について示したグラ
フである。When the lubricant 3 of the present invention is used, it is considered that the electric current VJLi not only flows through the a spot but also bridges the conductive ultrafine powder 5, so the apparent diameter of the a spot is d. (>d.). Therefore, the conductive ultrafine powder 5 in the lubricant 3 significantly contributes to reducing contact resistance. Figures 5 and 6 are for stationary contacts, Figure 7 is for sliding contacts,
When not using lubricant (D), ■ Silicone oil (l
When a lubricant containing a mixture of occ) and petrolatum (1 g) is used (E), ■ A lubricant of the present invention in which silicone oil (10 cC) and petrolatum (1 g) are mixed with Ag-10XPd ultrafine powder (lmg). We show the results of experiments for three cases: CF). Note that the contact 1l was a steel ball, and the contact 12 was a copper plate. FIG. 5 is a graph showing the relationship between contact voltage drop and contact load in the above state.
同図より、（イ）いずれの条件下でも、接触荷重の増大
に伴う接触面積の増加に起因して接触電圧降下が小さく
なること、（口）潤滑方法が接触電圧降下に及ぼす影響
は（Ｄ）、（Ｅ）、（Ｆ）の順に小さいこと、（ハ）特
に本発明の超微＄５３末含有潤滑における接触電圧降下
はいずれの接触荷重でも無潤滑の場合よりほぼ一桁小さ
いこと、などがわかる．
第６図は、上記の状態において接触荷重を０．５ｇとし
た場合の接触抵抗と電流との関係について示したグラフ
である．接触抵抗はいずれの電流でも（Ｄ）、（Ｅ）、
（Ｆ）の順に小さくなり、特に本発明の潤滑剤（Ｆ）に
おいては接触抵抗が０．２Ａ以下でほぼ０、すなわち金
属内部の導電状態に対応する様相を示すことがわかる．
第７図は、上記の状態において電流を０．５Ａとした場
合の接触電圧降下と接触荷重との関係について示したグ
ラフである。この場合、摺動速度は１０ｍｍ／ｓｅｃで
ある。同図より、（イ）いづれの潤滑剤でも接触電圧降
下は接触荷重の増大に伴って減少すること、（口）いづ
れの接触荷重でもオイルとワセリンの混合潤滑（Ｅ）は
無潤滑（Ｄ）より小さな接触電圧降下を示すこと、（ハ
）金属超微粉末含有潤滑（Ｆ）は、０．５ｇの接触荷重
では他の２つの潤滑剤より小さな接触電圧降下を示すの
に対し、１．０ ｇ以上の接触荷重では他の２つの潤滑
法より大きな接触電圧降下であることなどがわかる．
上記の（イ）〜（ハ）は次の理由に基づくものと考えら
れる．（イ）は接触荷重に伴い接触面積が増大する．（
口）は潤滑面の表面あらさが無潤滑面の表面あらさより
小さく、これに伴うａ−スポｙ｝数の差異に起因する．
（ハ）は金属超微粒の摩耗粉効果に起因する，すなわち
、金属超微粉末は固体接触間にはさまれつつ移動するた
め、表面あらさが見掛け上大きくなった様相に対応する
。From the figure, we can see that (a) under any condition, the contact voltage drop decreases due to the increase in the contact area as the contact load increases, and (c) the effect of the lubrication method on the contact voltage drop is (D ), (E), and (F) are smaller in this order; (c) the contact voltage drop, especially in the lubrication containing the ultrafine $53 powder of the present invention, is approximately one order of magnitude smaller than in the case without lubrication at any contact load, etc. I understand. FIG. 6 is a graph showing the relationship between contact resistance and current when the contact load is 0.5 g under the above conditions. Contact resistance is (D), (E),
It can be seen that the contact resistance decreases in the order of (F), and in particular, in the lubricant (F) of the present invention, the contact resistance is almost 0 at 0.2 A or less, that is, it shows an aspect corresponding to the conductive state inside the metal. FIG. 7 is a graph showing the relationship between the contact voltage drop and the contact load when the current is 0.5 A in the above state. In this case, the sliding speed is 10 mm/sec. From the figure, (a) the contact voltage drop decreases as the contact load increases for any lubricant, and (c) for any contact load, mixed lubrication of oil and petrolatum (E) is different from no lubrication (D). (c) The lubricant containing ultrafine metal powder (F) shows a smaller contact voltage drop than the other two lubricants at a contact load of 0.5 g; It can be seen that the contact voltage drop is larger than the other two lubrication methods when the contact load is greater than g. The above (a) to (c) are considered to be based on the following reasons. In (a), the contact area increases with the contact load. (
The reason for this is that the surface roughness of the lubricated surface is smaller than that of the non-lubricated surface, and this is due to the difference in the number of a-spoy}.
(C) is caused by the abrasion powder effect of the ultrafine metal particles; in other words, the ultrafine metal particles move while being sandwiched between solid contacts, resulting in an apparent increase in surface roughness.
その結果、ａ−スポット数が減少して接触電圧降下が増
大する．
以上の実験結果から、潤滑剤に含有する金属超微粉末が
電気接触抵抗に与える影響は、■橋渡り効果と、■通電
を阻止する摩耗粉効果に依存して変化することがわかる
．前者は電気接触抵抗を小さくするように作用し、後者
は電気接触抵抗を増大させるように作用する。そのため
、摩耗粉効果を押さえる使用条件で金属超微粉末含有潤
滑剤を利用することが必要である。上述した非接触ある
いは微小な接触荷重下での静止接点、摺動接点において
グリース状あるいは液体状潤滑剤に導電性超微粉末を含
有させたものを使用することは、電気接触抵抗の減少に
極めて有効である．第８図は、上記の実験結果に基づい
て実際にビデオテーブレコーダ（ＶＴＲ）のアース接点
に適用した例を示す図、第９図はその場合の接触電圧降
下と経過時間との関係について示したグラフである．第
８図において、８は回転軸、９はアース線でばね用金属
線を用いている．回転軸８に対するアース線９の押付荷
重はｌｋｇ以下、電流は微少量である．その状態におい
て、前記と同様に３通りについて実験した．この場合潤
滑剤３はグリースを用いた．
第９図より、（イ）潤滑剤を使用しない場合（Ｄ）は接
触電圧降下の経時変化が著しく大きい、（口）従来の潤
滑グリースを使用した場合（Ｆ．）は接触電圧降下の上
昇がｌＯＯ時間あたりから認められ、初期においても本
発明の潤滑グリースを使用した場合（Ｆ）より一桁大き
な接触電圧降下を示す、（ハ）本発明の潤滑グリースを
使用した場合（Ｆ）は接触電圧降下の経時変化がな《、
常にＯ．ｌｍＶと極めて小さな値を示す、ことがわかる
．〔発明の効果〕
本発明の電気接点用潤滑剤は、従来の潤Ｉｆ荊がもつ電
気接触抵抗が大きいという問題を解決した潤滑剤であり
、潤滑剤に導電性超微粉末を分散させるだけで容易に製
造できるという効果がある。As a result, the number of a-spots decreases and the contact voltage drop increases. From the above experimental results, it can be seen that the influence of the ultrafine metal powder contained in the lubricant on electrical contact resistance changes depending on ① the bridging effect and ③ the wear powder effect that prevents current flow. The former acts to reduce electrical contact resistance, and the latter acts to increase electrical contact resistance. Therefore, it is necessary to use a lubricant containing ultrafine metal powder under usage conditions that suppress the effect of wear particles. The use of grease-like or liquid lubricants containing conductive ultrafine powder in the above-mentioned stationary contacts or sliding contacts under non-contact or minute contact loads is extremely effective in reducing electrical contact resistance. It is valid. Figure 8 is a diagram showing an example where the above experimental results were actually applied to the ground contact of a video table recorder (VTR), and Figure 9 shows the relationship between contact voltage drop and elapsed time in that case. It is a graph. In Fig. 8, 8 is the rotating shaft, and 9 is the ground wire, which uses a metal wire for the spring. The pressing load of the ground wire 9 against the rotating shaft 8 is less than 1 kg, and the current is very small. In this state, we conducted three experiments in the same way as above. In this case, grease was used as lubricant 3. From Figure 9, we can see that (a) the contact voltage drop changes significantly over time when no lubricant is used (D), and (c) the contact voltage drop increases significantly when conventional lubricating grease is used (F.). It was observed from around 100 hours, and even at the initial stage, the contact voltage drop was an order of magnitude larger than that when the lubricating grease of the present invention was used (F). (C) The contact voltage drop when the lubricating grease of the present invention was used (F) There is no change in descent over time《,
Always O. It can be seen that it shows an extremely small value of lmV. [Effects of the Invention] The lubricant for electrical contacts of the present invention is a lubricant that solves the problem of high electrical contact resistance of conventional lubricants, and can be applied simply by dispersing conductive ultrafine powder in the lubricant. It has the advantage of being easy to manufacture.
第１図は非接触接点における本発明の原理図、第２図・
第３図は非接触接点における接触電圧降下と電流との関
係のグラフ、第４図は接触接点における本発明の原理図
、第５図・第６回・第７回・第９図は接触・静止接点に
おける本発明の実施例の特性を示したグラフ、第８図は
ビデオテープレコーダ（ＶＴＲ）のアース接点に使用し
た例を示す図である．
ｌ・２・１１・１２は電気接点、４は潤滑剤、５は導電
性超微粉末、ｉは電流．
特許出願人 オーパック株式会社
第１図
第４図
第３図
第２図
ｔ５九（Ａ）
第５図
ｔ シｊｕ（ Ａ ）
捧舷埼ｔ（９）
第６図
覚
５Ｌ（Ａ）
第８図
刹ジ１時間（峙閉》Figure 1 is a diagram of the principle of the present invention in a non-contact contact, Figure 2.
Fig. 3 is a graph of the relationship between contact voltage drop and current in non-contact contacts, Fig. 4 is a diagram of the principle of the present invention in contact contacts, and Figs. FIG. 8 is a graph showing the characteristics of an embodiment of the present invention in a stationary contact, and is a diagram showing an example of use in a ground contact of a video tape recorder (VTR). 1, 2, 11, and 12 are electrical contacts, 4 is a lubricant, 5 is a conductive ultrafine powder, and i is a current. Patent Applicant O-PAC Co., Ltd. Figure 1 Figure 4 Figure 3 Figure 2 Figure 2 t59 (A) Figure 5 t Shiju (A) Hogensaki t (9) 6th Figure 5L (A) No. 8 1 hour of drawings (closed)
Claims (1)
特徴とする電気接点用潤滑剤。(1) A lubricant for electrical contacts, characterized in that the lubricant contains conductive ultrafine powder dispersed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1114683A JP2804509B2 (en) | 1989-05-08 | 1989-05-08 | Lubricants for electrical contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1114683A JP2804509B2 (en) | 1989-05-08 | 1989-05-08 | Lubricants for electrical contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02294394A true JPH02294394A (en) | 1990-12-05 |
| JP2804509B2 JP2804509B2 (en) | 1998-09-30 |
Family
ID=14644032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1114683A Expired - Fee Related JP2804509B2 (en) | 1989-05-08 | 1989-05-08 | Lubricants for electrical contacts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2804509B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006017571A3 (en) * | 2004-08-05 | 2006-04-13 | Du Pont | Fine particle dispersion compositions and uses thereof |
| CN111117736A (en) * | 2019-11-11 | 2020-05-08 | 风帆有限责任公司 | Storage battery electrode protection oil and preparation method thereof |
| CN113583741A (en) * | 2021-07-20 | 2021-11-02 | 广东月福汽车用品有限公司 | Brake anti-occlusion lubricant and preparation method and application thereof |
-
1989
- 1989-05-08 JP JP1114683A patent/JP2804509B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006017571A3 (en) * | 2004-08-05 | 2006-04-13 | Du Pont | Fine particle dispersion compositions and uses thereof |
| CN111117736A (en) * | 2019-11-11 | 2020-05-08 | 风帆有限责任公司 | Storage battery electrode protection oil and preparation method thereof |
| CN113583741A (en) * | 2021-07-20 | 2021-11-02 | 广东月福汽车用品有限公司 | Brake anti-occlusion lubricant and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2804509B2 (en) | 1998-09-30 |
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