JPH0438152A - Electrical brush - Google Patents
Electrical brushInfo
- Publication number
- JPH0438152A JPH0438152A JP14468190A JP14468190A JPH0438152A JP H0438152 A JPH0438152 A JP H0438152A JP 14468190 A JP14468190 A JP 14468190A JP 14468190 A JP14468190 A JP 14468190A JP H0438152 A JPH0438152 A JP H0438152A
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- boron carbide
- electric brush
- molybdenum disulfide
- commutator
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010439 graphite Substances 0.000 claims abstract description 12
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 12
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 10
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 8
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 229910021382 natural graphite Inorganic materials 0.000 abstract description 2
- 239000005011 phenolic resin Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910033181 TiB2 Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 239000011134 resol-type phenolic resin Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は回転電機用、特に小型回転電機用電刷子に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric brush for rotating electric machines, particularly for small-sized rotating electric machines.
（従来の技術）
低電圧、大電流を必要とする電動機等の回転電機は小型
軽量化に整向され、近年さらに高速回転。(Conventional technology) Rotating electrical machines such as electric motors that require low voltage and high current have been designed to be smaller and lighter, and in recent years have been rotating at even higher speeds.
大電流化が進み、電刷子の摺動に際しては、振動発生と
ともに、火花発生が多く、整流子面の黒化。As electric currents become larger and the electric brush slides, vibrations and sparks are generated, causing blackening of the commutator surface.
凹凸が生じ、電気損失の増大とともに、電刷子の摩耗も
増大する方向にある。As unevenness occurs, electrical loss increases and wear of the electric brush also increases.
電刷子の摩耗低減法として９％開昭５８−１２１５８２
号公報ではＭＯ８ｔ、 ＷＳ２の添加、特公昭５９−２
５３５１号公報ではＣｕ８の添加。9% as a method to reduce wear of electric brushes 1977-121582
In the publication, MO8t, addition of WS2, Special Publication No. 59-2
In 5351 publication, Cu8 is added.
特公昭５８−１８９７８号公報では燐化合物。Japanese Patent Publication No. 58-18978 describes phosphorus compounds.
ＭＯ８ｓ 、 Ｗ８寞の添加、さらに％開昭６３−１３
１４７９号公報では二硼化チタンの添加物を含有せしめ
て、ブラシ摩耗を改善することを提唱ししている。Addition of MO8s, W8寞, and further addition of %
Publication No. 1479 proposes containing an additive of titanium diboride to improve brush wear.
（発明が解決しようとする課題）
これらの従来技術は電刷子摩耗に対する潤滑助剤として
は、有効であるが、最近の回転電機が指向する出力維持
及び長寿命化のための材料としては不充分である。即ち
特開昭５８−１２１５８２号公報及び特公昭５８−１８
９７８号公報に示さと
れる電刷子用いた場合には、電刷子摩耗に対してハ
ほかなシの効果はあるものの、高温下で使用される場合
に電刷子及び整流子間に発生する皮膜が過剰となり、出
力が低下する欠点がある。(Problem to be solved by the invention) Although these conventional technologies are effective as lubricating aids for electric brush wear, they are insufficient as materials for maintaining output and extending the life of modern rotating electric machines. It is. Namely, JP-A-58-121582 and JP-A-58-18
When the electric brush shown in Publication No. 978 is used, although it has a certain effect on electric brush wear, an excessive film is formed between the electric brush and the commutator when it is used at high temperatures. This has the disadvantage that the output decreases.
また９％公昭５９−２５３５１号公報及び％開昭６３−
１３１４７９号公報に示される添加物を含有した電刷子
では、高速回転時及び低湿条件下で研摩性が強く、電刷
子相手材の整流子面を攻撃する欠点がある。Also, 9% Publication No. 59-25351 and % Publication No. 63-
The electric brush containing the additive disclosed in Japanese Patent No. 131479 has a drawback that it is highly abrasive during high-speed rotation and under low humidity conditions, and attacks the commutator surface of the electric brush mating material.
本発明は、高電流、高温下における潤滑性を保持し、さ
らに高速回転下での耐久時間の延長に対する整流子面で
の皮膜生成の過不足を調整させて。The present invention maintains lubricity under high current and high temperatures, and furthermore adjusts the excess or deficiency of film formation on the commutator surface to extend durability under high speed rotation.
出力特性の維持とともに長寿命を得る電刷子を提供する
ものである。The present invention provides an electric brush that maintains output characteristics and has a long lifespan.
（１１題を解決するための手段）
本発ＢＡＦｉ、炭化硼素０．３〜２重量％、二硫化モリ
ブデン又は二硫化タングステン１〜４重量％を含有し、
残部は銅及び黒鉛からなる金属黒鉛質電刷子に関する。(Means for Solving Problem 11) The BAFi of the present invention contains 0.3 to 2% by weight of boron carbide and 1 to 4% by weight of molybdenum disulfide or tungsten disulfide,
The remainder relates to metal graphite electric brushes made of copper and graphite.
本発明における原料成分の炭化硼素は通常５〜７５μｍ
の粒子を用いる。含有量が０．３重量％未満でかつ粒子
径が小さいと皮膜調整作用が少なく。The boron carbide as a raw material component in the present invention is usually 5 to 75 μm.
particles are used. If the content is less than 0.3% by weight and the particle size is small, the film adjustment effect will be small.
接触電圧降下が増大する。また含有量が２重量％を越え
かつ粒子径が大きいと研摩性が過大となシ。Contact voltage drop increases. Also, if the content exceeds 2% by weight and the particle size is large, the abrasiveness will be excessive.
整流子を攻撃して好ましくない。また二硫化モリブデン
又は二硫化タングステン（以下二硫化モリブデンで代表
して説明する）は通常１０〜１５０μｍの粒子径のもの
を用いる。含有量が１重量％未満でかつ粒子径が小さい
と接触電圧降下が増大し易く、出力特性ならびに耐庫耗
性の効果が少ない。また含有量が４重量％を越えかつ粒
子径が大きい場合は低温下での研削性が強く、整流子面
を攻撃する要因となる。電刷子の主原料となる銅粉は出
力向上及び機械的強度向上からの機械摩耗低減として、
７５μｍ以下の電解銅粉の使用が好ましい。黒鉛は結晶
が良く発達した潤滑性の良い。It attacks the commutator and is undesirable. Moreover, molybdenum disulfide or tungsten disulfide (hereinafter, molybdenum disulfide will be representatively explained) has a particle size of usually 10 to 150 μm. If the content is less than 1% by weight and the particle size is small, the contact voltage drop tends to increase, and the effect on output characteristics and storage wear resistance is small. Furthermore, if the content exceeds 4% by weight and the particle size is large, the grindability at low temperatures is strong and may cause attacks on the commutator surface. Copper powder, which is the main raw material for electric brushes, is used to reduce mechanical wear by improving output and mechanical strength.
It is preferable to use electrolytic copper powder with a diameter of 75 μm or less. Graphite has well-developed crystals and good lubricity.
天然産の鱗状黒鉛を使用する。鱗状黒鉛は３０〜１５０
μｍ程度の粒子でも良いが、電動回転機用等の高出力を
要求されるマシンには、樹脂等の結合剤で造粒された１
００〜３００μｍ程度の粒子の方が出力特性ならびに耐
摩耗性での効果が顕著で好ましい。Uses naturally produced scaly graphite. Scale graphite is 30-150
Particles of about μm size are fine, but for machines that require high output such as electric rotating machines, particles granulated with a binder such as resin are used.
Particles with a diameter of about 00 to 300 μm are preferable because they are more effective in improving output characteristics and wear resistance.
上記した成分のほかに潤滑剤として鉛を３重量％以下含
有させてもよい。ただし鉛の量が多すぎると低温域で電
動機出力の低下や整流子の荒損奮起す場合がある。In addition to the above-mentioned components, lead may be contained as a lubricant in an amount of 3% by weight or less. However, if the amount of lead is too large, it may cause a decrease in motor output or damage to the commutator at low temperatures.
これらの成分を混合機にて約１時間混合し、十分に混合
されていること′ｔ−確認した後、成形プレスにて所望
の形状の金型を用い３〜３．５ Ｔｏｎ ／ａ！ｌ”に
て加圧成形し、その後不活性雰囲気にて、熱処理して電
刷子の素材を得る。その稜さらに最終形状に機械加工し
て電刷子を得る。These components were mixed in a mixer for about 1 hour, and after confirming that they were sufficiently mixed, they were mixed in a molding press using a mold of the desired shape to produce 3 to 3.5 Ton/a! The material is press-molded at 1" and then heat-treated in an inert atmosphere to obtain a raw material for an electric brush. The edges are further machined into the final shape to obtain an electric brush.
（作用）
二硫化モリブデンの必要量は電刷子の摩耗を低減し９膨
化硼素の必要量は過剰皮膜生成の場合ならびに整流火花
による整流子の黒化面を適度に是正し、出力に影響する
接触電圧降下の安定を図り。(Function) The necessary amount of molybdenum disulfide reduces the wear of the electric brush, and the necessary amount of 9-expanded boron appropriately corrects the blackened surface of the commutator due to excessive film formation and rectifying sparks, and the contact that affects the output. To stabilize voltage drop.
摺動接触を良好にすると推定される。It is presumed to improve sliding contact.
（実施例）
実施例１
炭化硼素（電気化学工業製、ボロ７カーノくイドナ１０
００）０．５重量％及び平均粒径１５μｍの二硫化モリ
ブデン２重量％、電解銅粉（福田金属製ＣＥ−１５＋７
０重量％、それに天然黒鉛（日本黒鉛工業ｇ、ＣＢ−１
００）及びレゾール型フェノール樹脂（日立化成工業製
、ＶＰ−１３Ｎ）を黒鉛７５：樹脂２５（重量％）の比
で配合したものを６０℃で加熱混合して顆粒状とした３
００μｍ以下の造粒黒鉛を残部とし原料成分とした。(Example) Example 1 Boron carbide (manufactured by Denki Kagaku Kogyo Co., Ltd., Boro 7 Car Idna 10)
00) 0.5% by weight and 2% by weight of molybdenum disulfide with an average particle size of 15 μm, electrolytic copper powder (CE-15+7 manufactured by Fukuda Metals)
0% by weight, and natural graphite (Nippon Graphite Kogyo g, CB-1
00) and a resol type phenolic resin (manufactured by Hitachi Chemical, VP-13N) in a ratio of graphite 75:resin 25 (wt%) were heated and mixed at 60°C to form granules3.
The remainder was granulated graphite with a diameter of 00 μm or less, which was used as a raw material component.
これら成分をミキサーで１時間混合し、その後鋼より線
のピグテール付き成形プレスで３．５ｔｏｎ／Ｃｍ”の
圧力で加圧成形した後、窒素ガス雰囲気で６時間７５０
℃まで熱処理した。次いで機械加工により電刷子を得た
。These components were mixed in a mixer for 1 hour, then pressure-formed in a steel stranded wire pigtail forming press at a pressure of 3.5 ton/Cm, and then heated for 6 hours in a nitrogen gas atmosphere.
Heat treated to ℃. Then, an electric brush was obtained by machining.
実施例２
実施例１における炭化硼素量を１．５重量％とした以外
は実施例１と同様にして電刷子素材を得た。Example 2 An electric brush material was obtained in the same manner as in Example 1 except that the amount of boron carbide in Example 1 was changed to 1.5% by weight.
比較例１
実施例ＩＫおける炭化硼素量を２５重量％とした以外は
実施例１と同様にして電刷子素材を得た。Comparative Example 1 An electric brush material was obtained in the same manner as in Example 1 except that the amount of boron carbide in Example IK was changed to 25% by weight.
比較例２
実施例１における炭化ｆＭ素を添加しない以外は実施例
１と同様にして電刷子素材を得意。Comparative Example 2 An electric brush material was produced in the same manner as in Example 1 except that the carbonized fM element in Example 1 was not added.
実施例及び比較例で得た電刷子素材から小型直流電動機
用の電刷子を機械加工し、電動機用と同等の大電流を通
電し、負荷試験を実施した。試験条件はＣｕ模擬整流子
、ＤＣ１００Ａ通電、１０００ｒ／ｍ、電刷子圧力を２
ｋｓ／ｃｆとし９通電１０ｓｅｃ。An electric brush for a small DC motor was machined from the electric brush materials obtained in Examples and Comparative Examples, and a load test was conducted by applying a large current equivalent to that for the electric motor. The test conditions were a Cu simulated commutator, DC 100A current, 1000 r/m, and an electric brush pressure of 2
ks/cf and 9 energization for 10 seconds.
無通電１０ ｓｅｃのサイクルで１００時間摺動した場
合の電刷子摩耗及び接触電圧降下、整流子面粗さを求め
た。その結果を第１表に示す。The electric brush wear, contact voltage drop, and commutator surface roughness were determined when the electric brush was slid for 100 hours in a cycle of 10 sec without electricity. The results are shown in Table 1.
第
表
第１表から従来材の比較例２に対比し、炭化硼素を加え
た実施例及び比較例１では、電刷子摩耗量が大幅に改善
された。また接触電圧降下も同様に改善された。比較例
１の炭化硼素２５重量％添加品は、整流子面の粗さが増
大することが明らかである。As shown in Table 1, compared to Comparative Example 2 of the conventional material, the electric brush wear amount was significantly improved in Examples and Comparative Example 1 in which boron carbide was added. Contact voltage drop was also improved. It is clear that the product of Comparative Example 1 containing 25% by weight of boron carbide increases the roughness of the commutator surface.
（発明の効果）
本発明の電刷子は、整流子に対する適度な皮膜調整作用
を有し、電動機の出力特性の向上とともに、を刷子摩耗
を低減させる。(Effects of the Invention) The electric brush of the present invention has an appropriate film adjustment effect on the commutator, improves the output characteristics of the motor, and reduces brush wear.
Claims (1)
又は二硫化タングステン１〜４重量％、残部が銅および
黒鉛からなる電刷子。1. An electric brush consisting of 0.3 to 2.0% by weight of boron carbide, 1 to 4% by weight of molybdenum disulfide or tungsten disulfide, and the remainder copper and graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144681A JP2570888B2 (en) | 1990-06-01 | 1990-06-01 | Electric brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144681A JP2570888B2 (en) | 1990-06-01 | 1990-06-01 | Electric brush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0438152A true JPH0438152A (en) | 1992-02-07 |
| JP2570888B2 JP2570888B2 (en) | 1997-01-16 |
Family
ID=15367782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2144681A Expired - Lifetime JP2570888B2 (en) | 1990-06-01 | 1990-06-01 | Electric brush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2570888B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447532A (en) * | 2013-09-09 | 2013-12-18 | 中南大学 | Electric brush-slip ring system made from graphite-molybdenum disulfide-copper composite material |
| CN103447531A (en) * | 2013-09-09 | 2013-12-18 | 中南大学 | Electric brush-sliding ring system made of silver-tungsten disulfide composite materials |
| JP2020171091A (en) * | 2019-04-01 | 2020-10-15 | 株式会社デンソー | DC motor |
| WO2021260771A1 (en) * | 2020-06-22 | 2021-12-30 | 昭和電工マテリアルズ株式会社 | Metal graphite material and electric brush |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5818978A (en) * | 1981-07-27 | 1983-02-03 | Nippon Telegr & Teleph Corp <Ntt> | Photosensor |
| JPH0238365A (en) * | 1988-07-27 | 1990-02-07 | Agency Of Ind Science & Technol | Complex sliding member of high-temperature-reisistant and high-strength graphite base |
-
1990
- 1990-06-01 JP JP2144681A patent/JP2570888B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5818978A (en) * | 1981-07-27 | 1983-02-03 | Nippon Telegr & Teleph Corp <Ntt> | Photosensor |
| JPH0238365A (en) * | 1988-07-27 | 1990-02-07 | Agency Of Ind Science & Technol | Complex sliding member of high-temperature-reisistant and high-strength graphite base |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447532A (en) * | 2013-09-09 | 2013-12-18 | 中南大学 | Electric brush-slip ring system made from graphite-molybdenum disulfide-copper composite material |
| CN103447531A (en) * | 2013-09-09 | 2013-12-18 | 中南大学 | Electric brush-sliding ring system made of silver-tungsten disulfide composite materials |
| JP2020171091A (en) * | 2019-04-01 | 2020-10-15 | 株式会社デンソー | DC motor |
| CN111799958A (en) * | 2019-04-01 | 2020-10-20 | 株式会社电装 | DC motor |
| WO2021260771A1 (en) * | 2020-06-22 | 2021-12-30 | 昭和電工マテリアルズ株式会社 | Metal graphite material and electric brush |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2570888B2 (en) | 1997-01-16 |
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