JP7516341B2 - Electric brush - Google Patents
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- JP7516341B2 JP7516341B2 JP2021211930A JP2021211930A JP7516341B2 JP 7516341 B2 JP7516341 B2 JP 7516341B2 JP 2021211930 A JP2021211930 A JP 2021211930A JP 2021211930 A JP2021211930 A JP 2021211930A JP 7516341 B2 JP7516341 B2 JP 7516341B2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 58
- 239000000843 powder Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- -1 silicate compound Chemical class 0.000 claims description 24
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 13
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 13
- 239000000440 bentonite Substances 0.000 claims description 8
- 229910000278 bentonite Inorganic materials 0.000 claims description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 8
- 229910021647 smectite Inorganic materials 0.000 claims description 8
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 description 21
- 229910002804 graphite Inorganic materials 0.000 description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 15
- 239000002245 particle Substances 0.000 description 14
- 238000000465 moulding Methods 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910021382 natural graphite Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052615 phyllosilicate Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- RYGMFSIKBFXOCR-AHCXROLUSA-N copper-60 Chemical compound [60Cu] RYGMFSIKBFXOCR-AHCXROLUSA-N 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
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- Powder Metallurgy (AREA)
Description
本発明は電気機械等に用いられる電刷子に関し、例えば、スリップリングと接触して、良好な摺動状態を維持しながら通電する電刷子に関する。 The present invention relates to an electric brush used in electric machines, for example, an electric brush that contacts a slip ring and conducts electricity while maintaining a good sliding condition.
電刷子は、摺動接触により、回転電機の固定部から回転部に通電する機能を有する部材であるため、導電性、摺動性及び耐摩耗性が要求される。
この電刷子は、特許文献１に示すように、導電性を確保するための銅粒子、摺動性及び耐摩耗性を確保するための黒鉛粒子、並びに銅粒子と黒鉛粒子とを結合させるためのバインダーを混合して成形した後、焼成することによって製造される。
An electric brush is a member that has the function of passing electricity from a fixed part to a rotating part of a rotating electric machine by sliding contact, and therefore is required to have electrical conductivity, slidability and abrasion resistance.
As disclosed in Patent Document 1, this electric brush is manufactured by mixing copper particles for ensuring electrical conductivity, graphite particles for ensuring sliding properties and abrasion resistance, and a binder for binding the copper particles and the graphite particles, molding the mixture, and then firing the mixture.
そしてまた、特許文献２では、自動車のスリップリングは高電流密度、高速度の過酷な条件下で用いられるため、カーボンブラシの耐摩耗性を向上させることを目的に、黒鉛粒子と、導電性ダイヤモンドライクカーボン膜によって被覆された銅粒子とを含むカーボンブラシが提案されている。 Furthermore, in Patent Document 2, because automotive slip rings are used under harsh conditions of high current density and high speed, a carbon brush containing graphite particles and copper particles coated with a conductive diamond-like carbon film is proposed for the purpose of improving the wear resistance of the carbon brush.
更に、特許文献３では、導電性金属、黒鉛、バインダーの炭化物であるカーボン成分及び二硫化モリブデンからなる金属－黒鉛質電刷子において、前記導電性金属の粒子の表面に二硫化モリブデンを被膜状に存在させることによって、摩擦係数を小さくし、かつ、耐摩粍性を向上させた金属－黒鉛質電刷子が提案されている。 Furthermore, Patent Document 3 proposes a metal-graphite electric brush made of a conductive metal, graphite, a carbon component (carbide of a binder), and molybdenum disulfide, in which the surface of the particles of the conductive metal is coated with molybdenum disulfide to reduce the coefficient of friction and improve wear resistance.
しかしながら、特許文献１～３に示したいずれの電刷子も、摺動時において、社会的な要求を満たすような、安定した摺動状態が得られるものでなかった。
即ち、摺動時には摺動面の水分が減少し（適度な水分を含んだ黒鉛被膜の生成が抑制され）、黒鉛の潤滑性が悪化し、電刷子の摩耗が増大し、社会的な要求を満足させることができないという課題があった。
However, none of the electric brushes disclosed in Patent Documents 1 to 3 were able to provide a stable sliding state during sliding that would satisfy social demands.
That is, the moisture content of the sliding surface decreases during sliding (the formation of a graphite film containing an appropriate amount of moisture is suppressed), the lubricity of the graphite deteriorates, and wear of the electric brush increases, resulting in a problem in which social demands cannot be satisfied.
本発明は、上記課題を解決するためになされたものであり、適度な水分を含んだ黒鉛被膜が生成され、安定した摺動状態が得られる電刷子を提供することを目的とする。 The present invention was made to solve the above problems, and aims to provide an electric brush that produces a graphite coating that contains an appropriate amount of moisture, resulting in a stable sliding condition.
前記課題を解決するためになされた本発明にかかる電刷子は、金属粉末と黒鉛粉末とケイ酸塩化合物とを含有する電刷子であって、前記ケイ酸塩化合物がモンモリロナイト、カオリン、べントナイト、スメクタイト、タルクから選ばれる１種であり、前記金属粉末及び前記黒鉛粉末の総量１００重量％に対して、前記ケイ酸塩化合物が０．１重量％以上、１．０重量％以下含有されていることを特徴としている。 The electric brush of the present invention, which has been made to solve the above-mentioned problems, is an electric brush containing a metal powder, a graphite powder, and a silicate compound, wherein the silicate compound is one selected from montmorillonite, kaolin, bentonite, smectite, and talc, and the silicate compound is contained in an amount of 0.1% by weight or more and 1.0% by weight or less relative to 100% by weight of the total amount of the metal powder and the graphite powder.
このように、金属粉末及び黒鉛粉末の総量１００重量％に対して、モンモリロナイト、カオリン、べントナイト、スメクタイト、タルクから選ばれる１種である前記ケイ酸塩化合物が０．１重量％以上、１．０重量％以下含有されているため、適度な水分を含んだ黒鉛被膜が生成され、安定した摺動状態を得ることができ、電刷子の摩耗も抑制できる。 In this manner, the silicate compound, which is one type selected from montmorillonite, kaolin, bentonite, smectite and talc, is contained in an amount of 0.1% by weight or more and 1.0% by weight or less relative to 100% by weight of the total amount of metal powder and graphite powder. This allows the production of a graphite coating that contains an appropriate amount of moisture, thereby enabling a stable sliding condition to be obtained and also suppressing wear of the electric brush.
ここで、特に、前記ケイ酸塩化合物が、モンモリロナイト、べントナイト、スメクタイトから選ばれる１種であることが望ましい。
また、前記ケイ酸塩化合物が、前記金属粉末及び前記黒鉛粉末の総量１００重量％に対して、特に、０．６重量％以上、１．０重量％以下含有されていることが望ましい。
前記黒鉛粉末が６０重量％以上９５重量％以下、金属粉末が５重量％以上４０重量％以下であることが望ましい。また、前記黒鉛粉末が黒鉛造粒粉であり、金属粉末が電解銅粉であることが望ましい。
Here, it is particularly desirable that the silicate compound is one selected from the group consisting of montmorillonite, bentonite, and smectite.
Furthermore, it is particularly desirable that the silicate compound be contained in an amount of 0.6% by weight or more and 1.0% by weight or less relative to 100% by weight of the total amount of the metal powder and the graphite powder.
The graphite powder is preferably 60% by weight or more and 95% by weight or less, and the metal powder is preferably 5% by weight or more and 40% by weight or less. Also, the graphite powder is preferably graphite granulated powder, and the metal powder is preferably electrolytic copper powder.
この本発明にかかる電刷子は、金属粉末及び黒鉛粉末の総量１００重量％に対して、前記ケイ酸塩化合物が０．１重量％以上、１．０重量％以下配合した後、プレス成型し、焼成することによって、電刷子が製造される。
この電刷子は適度な水分を含んだ黒鉛被膜が生成され、安定した摺動状態を得ることができ、摩耗も抑制できる。
The electric brush of the present invention is manufactured by mixing 0.1% by weight or more and 1.0% by weight or less of the silicate compound with respect to a total amount of 100% by weight of metal powder and graphite powder, and then press-molding and sintering the mixture.
This electric brush produces a graphite coating that contains an appropriate amount of moisture, which allows for a stable sliding condition and reduces wear.
本発明によれば、適度な水分を含んだ黒鉛被膜が生成され、安定した摺動状態が得られ、電刷子の摩耗を低減することができる。 According to the present invention, a graphite coating containing the appropriate amount of moisture is produced, resulting in a stable sliding condition and reducing wear on the electric brush.
本発明にかかる電刷子は、金属粉末と黒鉛粉末とケイ酸塩化合物とを含有し、加圧成形することによって形成される電刷子であって、前記金属粉末及び黒鉛粉末の総量１００重量％に対して、前記ケイ酸塩化合物が０．１重量％以上、１．０重量％以下含有されている。
特に、ケイ酸塩化合物が０．１重量％以上、１．０重量％以下含有されている点に特徴がある。
The electric brush of the present invention contains metal powder, graphite powder, and a silicate compound and is formed by pressure molding, and contains 0.1% by weight or more and 1.0% by weight or less of the silicate compound relative to 100% by weight of the total amount of the metal powder and graphite powder.
In particular, it is characterized in that the silicate compound is contained in an amount of 0.1% by weight or more and 1.0% by weight or less.
このように、ケイ酸塩化合物を用いることにより、水分を保持でき、摺動時に適度な水分を含んだ黒鉛被膜を生成でき、安定した摺動状態を得ることができる。これにより、電刷子の摩耗も抑制できる。尚、ケイ酸塩化合物を含有させた場合においても、従来の電刷子の製造方法と同様に、加圧成形し、その後、焼結（焼成）することにより電刷子を製造することができる。 In this way, by using a silicate compound, moisture can be retained, and a graphite film containing the appropriate amount of moisture can be produced during sliding, resulting in a stable sliding state. This also reduces wear on the electric brush. Even when a silicate compound is included, an electric brush can be manufactured by pressure molding and then sintering (firing), as in the conventional manufacturing method for electric brushes.
そして、前記ケイ酸塩化合物の含有量が、０．１重量％未満の場合には、電刷子の摩耗抑制が少なく、好ましくない。また、ケイ酸塩化合物の含有量が１．０重量％を超える場合には、抵抗率の上昇、強度の低下、潤滑の低下により短ライフとなり、好ましくない。 If the content of the silicate compound is less than 0.1% by weight, the wear of the electric brush is not suppressed to a great extent, which is not preferable. If the content of the silicate compound exceeds 1.0% by weight, the resistivity increases, the strength decreases, and the lubrication decreases, which shortens the life of the brush, which is also not preferable.
前記ケイ酸塩化合物としては、保水性のある含水ケイ酸塩鉱物である、フィロケイ酸塩鉱物であることが望ましい。
このフィロケイ酸塩鉱物としては、モンモリロナイト、カオリン、ベントナイト、スメクタイト、タルク等がある。
The silicate compound is preferably a phyllosilicate mineral, which is a hydrous silicate mineral having water retention properties.
The phyllosilicate minerals include montmorillonite, kaolin, bentonite , smectite, talc, and the like.
また、使用する金属粉末としては例えば銅、銀、アルミニウム、錫、鉛、マンガン、鉄、ニッケルなどを用いることができるが、特に銅、銀が好ましい。前記銅、銀を用いた場合には、導電性にすぐれているという特質をいかすことができる。
また、金属粉末として導電性に優れ、抵抗率や強度の調整が容易などの理由から電解銅粉末を用いるのが好ましい。
The metal powder used may be, for example, copper, silver, aluminum, tin, lead, manganese, iron, nickel, etc., but copper and silver are particularly preferred, as their excellent electrical conductivity can be utilized.
Moreover, electrolytic copper powder is preferably used as a metal powder because it has excellent electrical conductivity and the resistivity and strength can be easily adjusted.
また、黒鉛粉末としては、例えば燐片状黒鉛、土状黒鉛などの天然黒鉛粉末、カーボンブラック、コークス粉末などの人造黒鉛を挙げることができるが、特に天然黒鉛粉末を使用することが好ましい。天然黒鉛粉末を用いた場合には、人造黒鉛よりも潤滑性に優れているために、摺動特性を向上させることができ、電刷子としての寿命を長くさせることに寄与できる。 Graphite powder can be, for example, natural graphite powder such as flake graphite and earthy graphite, or artificial graphite such as carbon black and coke powder, but it is particularly preferable to use natural graphite powder. When natural graphite powder is used, it has better lubricity than artificial graphite, which can improve the sliding characteristics and contribute to extending the life of the electric brush.
黒鉛粉末はバインダーを添加し、造粒する。また、前記した黒鉛粉末に対して添加されるバインダーとしては、常温においては粉末状であり、加熱によって液状となる例えば、フェノール樹脂、エポキシ樹脂などの熱硬化性樹脂を使用するのが望ましい。
また前記バインダーの添加量は成型後、熱処理により必要充分な結合強度を得られる量であればよい。好ましくは、バインダーの添加量は１～３０重量％である。
The graphite powder is granulated by adding a binder. As the binder to be added to the graphite powder, it is preferable to use a thermosetting resin such as a phenol resin or an epoxy resin, which is in a powder form at room temperature and becomes liquid when heated.
The amount of the binder added may be any amount that provides a necessary and sufficient bonding strength by heat treatment after molding, and is preferably 1 to 30% by weight.
黒鉛造粒粉の粒度分布は、２０μｍ乃至１０００μｍのもの（または１５メッシュパス）が用いられ、より好ましくは、５０μｍ乃至３００μｍのものが用いられる。
黒鉛造粒粉の粒度分布が１０００μｍを越える場合においては、機械的な強度が低下するという問題点が発生し、一方、２０μｍ未満の場合においては、抵抗率が著しく増加するという不都合が発生する。
The particle size distribution of the graphite granulated powder is from 20 μm to 1000 μm (or 15 mesh pass), and more preferably from 50 μm to 300 μm.
If the particle size distribution of the graphite granulated powder exceeds 1000 μm, a problem occurs in that the mechanical strength decreases, while if it is less than 20 μm, a problem occurs in that the resistivity increases significantly.
そして、上記したように、黒鉛粉末にバインダーを添加、造粒し、所定の粒度分布を有する黒鉛造粒粉とし、金属粉末として電解銅粉を添加するのがより望ましい。
尚、金属粉末と黒鉛粉末とケイ酸塩化合物の他に、固体潤滑剤を添加しても良い。固体潤滑剤としては、高温時の潤滑性に優れているという理由により、二硫化モリブデン（ＭｏＳ２）、二硫化タングステン（ＷＳ２）、窒化ホウ素（ＢＮ）のいずれか１つまたは複数が用いても良い。
As described above, it is more preferable to add a binder to graphite powder, granulate the graphite powder to obtain granulated graphite powder having a predetermined particle size distribution, and add electrolytic copper powder as the metal powder.
In addition to the metal powder, graphite powder, and silicate compound, a solid lubricant may be added, which may be one or more of molybdenum disulfide ( MoS2 ), tungsten disulfide ( WS2 ), and boron nitride (BN) because they have excellent lubrication properties at high temperatures.
前記金属粉末と前記黒鉛粉末（黒鉛造粒粉）との配合割合については特に制限はないが、金属含有量を増加させると、電刷子本体の導電率を増大させることができるものの、火花が発生し、摺動不良が発生する。一方、黒鉛粉末（黒鉛造粒粉）を増加させると、電刷子強度の低下、過度の発熱によって、電刷子の耐摩耗性が悪化する。
好ましくは、前記黒鉛粉末が６０重量％以上９５重量％以下、金属粉末が５重量％以上４０重量％以下であることが望ましい。
Although there is no particular restriction on the blending ratio of the metal powder and the graphite powder (granulated graphite powder), increasing the metal content can increase the electrical conductivity of the electric brush body, but causes sparks and poor sliding, while increasing the graphite powder (granulated graphite powder) reduces the strength of the electric brush and generates excessive heat, deteriorating the wear resistance of the electric brush.
It is preferable that the graphite powder is 60% by weight or more and 95% by weight or less, and the metal powder is 5% by weight or more and 40% by weight or less.
さらに加圧成型については特に制限はなく、通常の公知の方法で行うものとし、例えば成型圧力は２乃至４トン／ｃｍ２で成型することが好ましい。熱処理温度は４００℃～９００℃以下で処理することが好ましい。 Furthermore, there is no particular limitation on the pressure molding, and it may be performed by a commonly known method, for example, the molding pressure is preferably 2 to 4 tons/ cm2 . The heat treatment temperature is preferably 400°C to 900°C or less.
この本発明にかかる電刷子を製造するには、金属粉末として例えば電解銅粉末を５重量％以上４０重量％以下、例えば天然黒鉛粉を用いた黒鉛造粒粉を６０重量％以上９５重量％以下とし、総量１００重量％とする。
そして、ケイ酸塩化合物として、フィロケイ酸塩鉱物を０．１重量％以上、１．０重量％以下添加する。
尚、前記電解銅粉末は、その平均粒径が４０乃至５０μｍ（または３００メッシュパス）のものが用い、また黒鉛造粒粉は、粒径が５０乃至３００μｍ（または５０メッシュパス）のものを用いるのが好ましい。
To manufacture the electric brush according to the present invention, the metal powder is, for example, 5% by weight or more and 40% by weight or less of electrolytic copper powder, and 60% by weight or more and 95% by weight or less of graphite granulated powder using, for example, natural graphite powder, making the total amount 100% by weight.
As the silicate compound, 0.1% by weight or more and 1.0% by weight or less of a phyllosilicate mineral is added.
The electrolytic copper powder used has an average particle size of 40 to 50 μm (or 300 mesh pass), and the graphite granulated powder used has an average particle size of 50 to 300 μm (or 50 mesh pass).
（実施例１）
金属粉末として電解銅粉末を３０重量％、天然黒鉛粉を用いた黒鉛造粒粉を７０重量％とし、総量１００重量％とした。そして、ケイ酸塩化合物として、モンモリロナイトを０．６重量％添加した。
尚、前記電解銅粉末は、その平均粒径が４０乃至５０μｍ（または３００メッシュパス）のものが用い、また黒鉛造粒粉は、粒径が５０乃至３００μｍ（または５０メッシュパス）のものを用いた。
Example 1
The metal powder was 30% by weight of electrolytic copper powder, and the graphite granulated powder using natural graphite powder was 70% by weight, totaling 100% by weight. Montmorillonite was added as a silicate compound at 0.6% by weight.
The electrolytic copper powder used had an average particle size of 40 to 50 μm (or 300 mesh pass), and the graphite granulated powder used had an average particle size of 50 to 300 μm (or 50 mesh pass).
これにバインダーとしてフェノール樹脂粉末をさらに２０重量％添加し、４トン／ｃｍ２の成型圧力で角柱状に成型した。これを６００℃で２時間熱処理した。
その後、１０ｍｍ×１６ｍｍ×３２ｍｍに切り出し、リード線を埋め込み電刷子とした。
To this was further added 20% by weight of phenolic resin powder as a binder, and the mixture was molded into a rectangular column shape at a molding pressure of 4 tons/ cm2 , followed by a heat treatment at 600°C for 2 hours.
Thereafter, a size of 10 mm×16 mm×32 mm was cut out, and lead wires were embedded therein to form an electric brush.
次に、この電刷子とＳＵＳ製スリップリングを用いて摺動試験を行った。
スリップリングの材質はＳＵＳ３０４、スリップのリング周速は２５ｍ／ｓ、スリップリングのバネ圧：２００ｇ／ｃｍ２、電流密度：１０Ａ／ｃｍ２とし、湿度３０％、温度２０～２５℃の条件下で、電刷子をスリップリングに対して１０００時間摺動させ、電刷子の摩耗量を測定した。その結果を表１に示す。
Next, a sliding test was carried out using this electric brush and a SUS slip ring.
The slip ring material was SUS304, the slip ring peripheral speed was 25 m/s, the slip ring spring pressure was 200 g/ cm2 , the current density was 10 A/ cm2 , and the electric brush was caused to slide against the slip ring for 1000 hours under conditions of humidity 30% and temperature 20 to 25°C, and the wear amount of the electric brush was measured. The results are shown in Table 1.
（実施例２乃至実施例５）
電解銅粉末と黒鉛造粒粉とモンモリロナイトの配合量を表１に示す配合量とし、その他の条件は実施例１と同一とし、電刷子の摩耗量を測定した。その結果を表１に示す。
(Examples 2 to 5)
The amounts of electrolytic copper powder, granulated graphite powder, and montmorillonite were as shown in Table 1, and the other conditions were the same as in Example 1. The wear amount of the electric brush was measured. The results are shown in Table 1.
（比較例１乃至比較例５）
電解銅粉末と黒鉛造粒粉とモンモリロナイトの配合量を表１に示す配合量とし、その他の条件は実施例１と同一とし、電刷子の摩耗量を測定した。その結果を表１に示す。
尚、比較例２は電解銅粉末が配合されていない場合を、比較例３、４、５は、モンモリロナイトが配合されていない場合を示している。
(Comparative Examples 1 to 5)
The amounts of electrolytic copper powder, granulated graphite powder, and montmorillonite were as shown in Table 1, and the other conditions were the same as in Example 1. The wear amount of the electric brush was measured. The results are shown in Table 1.
Comparative Example 2 shows a case where electrolytic copper powder was not blended, and Comparative Examples 3, 4, and 5 show a case where montmorillonite was not blended.
測定結果から、黒鉛粉末が６０重量％以上９５重量％以下、金属粉末が５重量％以上４０重量％以下、モンモリロナイト（ケイ酸塩化合物）が０．１重量％以上、１．０重量％以下含有されている場合に、電刷子の摩耗量が少ないことが確認された。 The measurement results confirmed that the amount of wear on the electric brush was low when the material contained between 60% and 95% by weight of graphite powder, between 5% and 40% by weight of metal powder, and between 0.1% and 1.0% by weight of montmorillonite (a silicate compound).
モンモリロナイトをペントナイト、スメクタイトに変え、それぞれ実施例１～５、比較例１、２の含有量で同様に実験をした。
その結果、電刷子摩耗量はモンモリロナイト同様、黒鉛粉末が６０重量％以上９５重量％以下、金属粉末が５重量％以上４０重量％以下、ペントナイト、スメクタイトが０．１重量％以上、１．０重量％以下含有されている場合に、電刷子の摩耗量が少ないことが確認された。
Montmorillonite was replaced with bentonite and smectite, and experiments were carried out in the same manner as described above with the contents of Examples 1 to 5 and Comparative Examples 1 and 2, respectively.
As a result, it was confirmed that, like montmorillonite, the amount of wear of the electric brush was low when the material contained 60% by weight or more and 95% by weight or less of graphite powder, 5% by weight or more and 40% by weight or less of metal powder, and 0.1% by weight or more and 1.0% by weight or less of bentonite or smectite.
本発明の電刷子は、整流子用またはスリップリング用のいずれにも用いることができるが、特に、スリップリングと接触するスリップリング用の電刷子として用いるのが、より好ましい。 The electric brush of the present invention can be used for either a commutator or a slip ring, but is particularly preferably used as an electric brush for a slip ring that comes into contact with the slip ring.
Claims (3)
前記ケイ酸塩化合物がモンモリロナイト、カオリン、べントナイト、スメクタイト、タルクから選ばれる１種であり、前記金属粉末及び前記黒鉛粉末の総量１００重量％に対して、前記ケイ酸塩化合物が０．１重量％以上、１．０重量％以下含有されていることを特徴とする電刷子。 An electric brush containing a metal powder, a graphite powder, and a silicate compound,
The electric brush is characterized in that the silicate compound is one selected from montmorillonite, kaolin, bentonite, smectite, and talc, and the silicate compound is contained in an amount of 0.1% by weight or more and 1.0% by weight or less relative to 100% by weight of the total amount of the metal powder and the graphite powder.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008043028A (en) | 2006-08-04 | 2008-02-21 | Toraisu Kk | Carbon brush |
| JP2008259352A (en) | 2007-04-06 | 2008-10-23 | Totan Kako Kk | Carbon commutator and carbon brush for fuel pump, and fuel pump incorporating these carbon commutator and carbon brush |
| WO2016010104A1 (en) | 2014-07-17 | 2016-01-21 | トライス株式会社 | Laminate carbon brush for fuel pump motor |
| JP2018087110A (en) | 2016-11-29 | 2018-06-07 | 日立化成株式会社 | Metallic graphite base material and metallic graphite base brush |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008043028A (en) | 2006-08-04 | 2008-02-21 | Toraisu Kk | Carbon brush |
| JP2008259352A (en) | 2007-04-06 | 2008-10-23 | Totan Kako Kk | Carbon commutator and carbon brush for fuel pump, and fuel pump incorporating these carbon commutator and carbon brush |
| WO2016010104A1 (en) | 2014-07-17 | 2016-01-21 | トライス株式会社 | Laminate carbon brush for fuel pump motor |
| JP2018087110A (en) | 2016-11-29 | 2018-06-07 | 日立化成株式会社 | Metallic graphite base material and metallic graphite base brush |
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