CN100388570C - Brush in composite material of carbon fiber and graphite based on silver - Google Patents
Brush in composite material of carbon fiber and graphite based on silver Download PDFInfo
- Publication number
- CN100388570C CN100388570C CNB2006100407780A CN200610040778A CN100388570C CN 100388570 C CN100388570 C CN 100388570C CN B2006100407780 A CNB2006100407780 A CN B2006100407780A CN 200610040778 A CN200610040778 A CN 200610040778A CN 100388570 C CN100388570 C CN 100388570C
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- carbon fiber
- copper
- brush
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- silver
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Abstract
The present invention relates to an electric contact material that is an electric brush. The problem to be solved is that the present invention provides an electric brush of composite materials of carbon fiber and graphite based on silver in optimal adaptation of conductivity, intensity and abrasive resistance. The present invention is characterized in that raw materials of the electric brush comprise silver powder, copper powder, graphite, copper plating carbon fiber. Compared with the same product grade in domestic, the abrasive resistance of the present invention is obviously increased, and the service life is increased for 2 to 3 times. Since the present invention obtains the purpose of controlling the lodging direction of the carbon fiber through controlling pressure and pressing time, the present invention has the advantages of reducing the electric resistivity of the brush, increasing the density of carrying current, and increasing electricity (resistivity 0.06 to 0.09 micro ohm. m) and mechanical performances of the composite materials; the present invention makes an oxide film on the surface of a collector ring have medium and stable thickness.
Description
Technical field
The present invention relates to a kind of contact material, specifically brush.
Background technology
Brush is a kind of electrical material, also is contact material.It is as the important function parts, undertakes electric current and signal transmission between moving component in collector ring (collector ring) and the commutator and the fixed part, requires brush material to have good conductivity, heat conduction, resistance to wear and certain intensity requirements.
Brush as parts in the engine commutator more single to its performance requirement traditionally, but continuous expansion along with the brush application, especially for the brush in aerospace craft, carrier rocket and the signal monitoring system, have the advantages that will rectificate in work under bad environment, maintenance and repair difficulty, performance requirement height and useful life, conduction, intensity and the resistance to wear of traditional silver (copper)-graphite has been difficult to satisfy the serviceability requirement.
Existing brush manufacturing is, silver powder or copper powder and graphite are mixed in proportion, and adds organic binder bond, and machine work is made after mixing, compacting, sinter molding.
Summary of the invention
The objective of the invention is: the brush in composite material of carbon fiber and graphite based on silver that a kind of conduction, intensity and resistance to wear best fit are provided.
Concrete technical solution is:
Brush in composite material of carbon fiber and graphite based on silver is mixed in proportion by silver powder, copper powder and graphite, and after the compression moulding, sintering is made, and it comprises the raw material of following weight portion:
400 order silver contents are 99.99% silver powder 60-90
400 order copper contents are 99.99% copper powder 10-30
320 order phosphorus content are greater than 99.85% graphite 5-15
Copper carbon fiber 1-3
Described copper carbon fiber is the copper material bed of material for the carbon fiber extexine.
Above-mentioned raw materials is mixed compression moulding under pressure 200-300Mpa, time 12-20 condition second.
The length of described copper carbon fiber is 0.1-1mm, and average diameter 7-8 μ m, copper facing thickness are 0.5-2 μ m.
The innovative point that the present invention compared with prior art has:
1) at space flight, aviation field center brush require resistance coefficient little, transmit contain much information, stable signal transmission, characteristics that anti-wear performance is good, to the institutional framework of brush material and performance carry out, make carbon fiber-silver-based composite material brush be successfully applied to the field of aerospace TT﹠C system
2) utilize carbon fiber crystal structure characteristics and in electric process of friction and wear unique effect, carbon fiber is added in the brush in composite material, provide reliable guarantee technically for improving the brush combination property, device structure optimization for radar, control electrical micro-machine simultaneously provides possibility, compare with the trade mark with homemade, friction and wear behavior significantly improves, and improves 2-3 useful life doubly.
3) strengthen the surface modification of body by carbon, improve carbon fiber and graphite distributing homogeneity at silver matrix, control carbon fiber and graphite addition also selected best compacting, sintering process, processes such as control material density, obtain carbon fiber and graphite organizationally and evenly divided other metal three-dimensional net structure, significantly improved this composite material electricity and mechanical property.
4) the present invention is because by controlled pressure and press time, i.e. compression moulding under pressure 200-300Mpa, time 12-20 condition second, can reach control carbon fiber lodging direction, thereby reduced the resistivity of brush, resistivity is 0.06-0.09 μ Ω .m, improved current carrying density, and made the collector ring surface film oxide, thickness is moderate, stable.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
Embodiment 1:
Brush in composite material of carbon fiber and graphite based on silver comprises the raw material of following weight portion:
400 order silver contents are 99.99% silver powder 60-90
400 order copper contents are 99.99% copper powder 10-30
320 order phosphorus content are greater than 99.85% graphite 5-15
Copper coating carbon fiber 1-3
Above-mentioned raw materials is mixed, add organic binder bond routinely, compression moulding under pressure 200-300Mpa, time 12-20 condition second gets the brush product through sintering, machine work again.
Copper carbon fiber is the copper plated material layer for the carbon fiber extexine.The length of copper coating carbon fiber is 0.1mm, and average diameter 7 μ m, copper facing thickness are 0.5 μ m.
Embodiment 2:
Brush in composite material of carbon fiber and graphite based on silver comprises the raw material of following weight portion:
400 order silver contents are 99.99% silver powder 90
400 order copper contents are 99.99% copper powder 30
320 order phosphorus content are greater than 99.85% graphite 15
Copper coating carbon fiber 3
The length of copper coating carbon fiber is 0.45mm, and average diameter 7.5 μ m, copper facing thickness are 0.75 μ m.
Other is with embodiment 1.
Embodiment 3:
Brush in composite material of carbon fiber and graphite based on silver comprises the raw material of following weight portion:
400 order silver contents are 99.99% silver powder 75
400 order copper contents are 99.99% copper powder 20
320 order phosphorus content are greater than 99.85% graphite 8
Copper coating carbon fiber 2
The length of copper coating carbon fiber is 1mm, and average diameter 8 μ m, copper facing thickness are 2 μ m.
Other is with embodiment 1.
Claims (1)
1. brush in composite material of carbon fiber and graphite based on silver is mixed in proportion by silver powder, copper powder and graphite, and after the compression moulding, sintering is made, and it is characterized in that:
The raw material that comprises following weight portion
400 order silver contents are 99.99% silver powder 60-90
400 order copper contents are 99.99% copper powder 10-30
320 order phosphorus content are greater than 99.85% graphite 5-15
Copper carbon fiber 1-3
Described copper carbon fiber is the copper coating carbon fiber;
Above-mentioned raw materials is mixed, add organic binder bond routinely, compression moulding under pressure 200-300Mpa, time 12-20 condition second;
The length of described copper carbon fiber is 0.1-1mm, and average diameter 7-8 μ m, copper facing thickness are 0.5-2 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100407780A CN100388570C (en) | 2006-05-27 | 2006-05-27 | Brush in composite material of carbon fiber and graphite based on silver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100407780A CN100388570C (en) | 2006-05-27 | 2006-05-27 | Brush in composite material of carbon fiber and graphite based on silver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1874080A CN1874080A (en) | 2006-12-06 |
| CN100388570C true CN100388570C (en) | 2008-05-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100407780A Expired - Fee Related CN100388570C (en) | 2006-05-27 | 2006-05-27 | Brush in composite material of carbon fiber and graphite based on silver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100388570C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237108B (en) * | 2007-02-09 | 2010-09-01 | 黄继林 | Arc extinction brush and method for eliminating electric arc of power generator with this arc-extinction brush |
| CN101608288B (en) * | 2009-07-14 | 2011-05-25 | 西北工业大学 | Preparation method for vacuum electric contact material capable of controlling cathode spot movement |
| CN102304681A (en) * | 2011-08-29 | 2012-01-04 | 中南大学 | Carbon fiber and molybdenum disulfide silver-based composite material for electric brush and application method for composite material |
| CN102904145A (en) * | 2012-10-26 | 2013-01-30 | 海门市通达碳业有限公司 | Production process of wear-resistant electric brush |
| CN102931560B (en) * | 2012-11-21 | 2015-07-22 | 天津市贝特瑞新能源科技有限公司 | Brush material with excellent performance, and preparation method and application thereof |
| CN103447531B (en) * | 2013-09-09 | 2015-10-28 | 中南大学 | A kind of silver-tungsten disulfide brush in composite material-slip ring system |
| CN103701004B (en) * | 2013-11-29 | 2016-01-06 | 武汉工程大学 | A kind of carbon brush used for electric engine and preparation method thereof |
| CN108907205B (en) * | 2018-07-03 | 2020-07-28 | 大同新成新材料股份有限公司 | Manufacturing process of composite material electric brush |
| CN108988097A (en) * | 2018-07-03 | 2018-12-11 | 大同新成新材料股份有限公司 | A kind of manufacturing process of Silver Matrix Brush Materials |
| CN112563858B (en) * | 2020-12-03 | 2023-12-26 | 安徽爱意爱机电科技有限公司 | Four-way conductive slip ring suitable for high-temperature environment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447681A (en) * | 1993-12-21 | 1995-09-05 | Mando Corporation | Method for manufacturing metal graphite brush |
| CN1152809A (en) * | 1996-09-25 | 1997-06-25 | 宝山钢铁(集团)公司 | Copper-plated carbon fibre metal graphite composite electric brush and making method |
| CN1256534A (en) * | 1999-12-29 | 2000-06-14 | 上海宝钢集团公司 | Superhigh current carrying density wiper and its manufacture |
-
2006
- 2006-05-27 CN CNB2006100407780A patent/CN100388570C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447681A (en) * | 1993-12-21 | 1995-09-05 | Mando Corporation | Method for manufacturing metal graphite brush |
| CN1152809A (en) * | 1996-09-25 | 1997-06-25 | 宝山钢铁(集团)公司 | Copper-plated carbon fibre metal graphite composite electric brush and making method |
| CN1256534A (en) * | 1999-12-29 | 2000-06-14 | 上海宝钢集团公司 | Superhigh current carrying density wiper and its manufacture |
Non-Patent Citations (2)
| Title |
|---|
| 镀铜石墨－银基复合材料的制备与性能研究. 许少凡，王彪，王成福.兵器材料科学与工程，第28卷第2期. 2005 |
| 镀铜石墨－银基复合材料的制备与性能研究. 许少凡，王彪，王成福.兵器材料科学与工程，第28卷第2期. 2005 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1874080A (en) | 2006-12-06 |
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Assignee: Hefei engineering composite material hi tech Development Co Ltd Assignor: Hefei University of Technology Contract record no.: 2011340000049 Denomination of invention: Brush in composite material of carbon fiber and graphite based on silver Granted publication date: 20080514 License type: Exclusive License Open date: 20061206 Record date: 20110621 Assignee: Hefei engineering composite material hi tech Development Co Ltd Assignor: Hefei University of Technology Contract record no.: 2011340000049 Denomination of invention: Brush in composite material of carbon fiber and graphite based on silver Granted publication date: 20080514 License type: Exclusive License Open date: 20061206 Record date: 20110621 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20190527 |