CN106521226A - High-density copper-based graphite motor carbon brush and preparation method thereof - Google Patents
High-density copper-based graphite motor carbon brush and preparation method thereof Download PDFInfo
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- CN106521226A CN106521226A CN201610927141.7A CN201610927141A CN106521226A CN 106521226 A CN106521226 A CN 106521226A CN 201610927141 A CN201610927141 A CN 201610927141A CN 106521226 A CN106521226 A CN 106521226A
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- carbon brush
- copper
- dopamine
- powder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Motor Or Generator Current Collectors (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a high-density copper-based graphite motor carbon brush. The carbon brush is formed by compounding and then sintering of raw materials like natural flake graphite, copper powder, Ni-Co alloy powder and PPTA-pulp. In the preparation process, the natural flake graphite and the PPTA-pulp are modified through polydopamine, and the affinity of the treated natural flake graphite with other materials is higher. The surface of the PPTA-pulp is coated with carbon nanospheres, so that certain electrical conductivity is achieved. By the adoption of the excellent catching force of the PPTA-pulp, all the raw materials can be firmly bonded, and a high-density material is obtained after sintering. The compound copper-based carbon brush material prepared through the method has good friction performance and toughness, the lubricating property is good, short-circuit ignition cannot happen easily, and the service life is longer.
Description
Technical field
The present invention relates to graphite carbon brush technical field, more particularly to a kind of high-compactness copper-base graphite carbon brush for electric machine and its
Preparation method.
Background technology
Carbon brush is the class rubbing device for transmitting energy or signal in motor between standing part and rotating part, is electricity
The important composition part of motivation, is the mixture of a kind of graphite and adhesive, as its main component is carbon, so referred to as carbon
Brush.Carbon brush imports the sliding contact body of electric current as deriving, it is desirable to which which has good conduction, heat conduction and greasy property, and
Property with certain mechanical strength and commutation property spark, with the development of science and technology, the species of motor and the operating mode for using
Condition is more and more diversified, requires also more and more higher to the combination property of carbon brush material.
By composition and the production technology of raw material, carbon brush material can be divided into carbon graphite class, electrographite class, metallic graphite carbon
Class, wherein metallic graphite carbon class carbon brush fabrication cycle are shorter, and processing technology is relatively easy, using relatively broad.Traditional metal stone
Black class carbon brush is mainly the metal-powders such as crystalline flake graphite and copper powder, argentum powder, glass putty and mixes in the presence of bonding agent, suppresses, burns
Knot is prepared, the addition of metallic element can the hardness of significant impact material, toughness, electric conductivity and frictional behaviour, metal
Species and proportioning be realize material combination property coordinate key；The originals such as bonding agent in addition, in system, function additive
Expect also there is important impact to the performance of carbon brush.《Impact of the addition of Pb and Sn to high compound brush organizational structure and performance》One is literary
Pb, Sn alloying element is described to the performance impact containing compound brush, is as a result shown, the hardness to material of alloying element, toughness
It is improved to some extent, but shows poor in electric conductivity and wearability, the total tune of material property is weaker, makes
Use effect on driving birds is not good；Studies have reported that, the addition of nano material has some improvement to the wearability of carbon brush, such as《Carbon is received
The preparation and performance study of mitron reinforced resin/graphite carbon brush》One text introduces CNT as modifying agent, effectively reduces
The coefficient of friction of material, anti-wear performance are good, but epoxy resin adhesive therein receives the carbonization granule of thermosetting rubbed
Easily come off in journey, cause surface defect occur, accelerated wear test causes carbon brush degradation after working long hours.
The content of the invention
The object of the invention is exactly for the defect for making up prior art, there is provided a kind of copper-base graphite motor carbon of high-compactness
Brush and preparation method thereof.
The present invention is achieved by the following technical solutions：
A kind of copper-base graphite carbon brush for electric machine of high-compactness, the carbon brush material are made up of the raw material of following weight portion：Carbon nanometer is micro-
Ball 1-2, natural flake graphite powder 10-15, metal silicon powder 2-3, copper powder 30-50, cobalt-nickel alloy powder 3-5, Fanglun slurry cake 2-5,
Ethanol（Analysis is pure）40-50, stearic acid 0.4-0.5, Tris-HCl buffer solution are appropriate, Dopamine Hydrochloride 2-3, deionized water
50-60。
A kind of preparation method of the copper-base graphite carbon brush for electric machine of described high-compactness is comprised the following steps：
（1）First remove in ionized water input reaction vessel, be subsequently added into Dopamine Hydrochloride, stir to which and be completely dissolved rear Deca
Tris-HCl buffer solution, regulation system pH value are 8-8.5, obtain dopamine solution standby；
（2）The dopamine solution of 30-40 weight portions is taken, natural flake graphite powder is added, after being uniformly mixed, is stood 36-48h,
Process is filtered after terminating, and product is dried after washing, obtains the modified natural flake graphite powder in surface standby；
（3）The dopamine solution of remainder amount, adds carbon nanometer micro ball, Fanglun slurry cake, stands 36- after sonic oscillation dispersion 1-2h
48h, process are filtered after terminating, and product is dried after washing, obtain the aramid fiber slurry of Surface coating carbon nanometer micro ball-poly-dopamine film layer
The dregs of rice are standby；
（4）By the surface modified natural crystalline graphite powder of above-mentioned preparation, the virtue of Surface coating carbon nanometer micro ball-poly-dopamine film layer
Dried after synthetic fibre pulp and other leftover materials ball milling mixings 2-3h, is completely dried rear material Jing under 250-300MPa pressure
Full automatic press band wire one-shot forming, subsequent base substrate vacuum high-temperature sintering are processed, and obtain final product described carbon brush material.
Described step（4）Middle base substrate vacuum high-temperature sintering condition is：Vacuum：8-10Pa, sintering temperature are 875-925
DEG C, pressure is 5-10MPa, and sintering time is 40-60min.
The present invention is prepared for a kind of copper-base graphite carbon brush for electric machine of high-compactness, and this carbon brush material is with natural scale stone
Sinter after the raw materials such as ink, copper powder, cobalt-nickel alloy powder, Fanglun slurry cake compounding and form, by natural flake graphite, virtue in preparation process
Synthetic fibre pulp is modified process using poly-dopamine, and the natural flake graphite after process is higher with the affinity of other materials, and
Fanglun slurry cake Surface coating carbon nanometer micro ball, obtains certain electric conductivity, and using Fanglun slurry cake excellent grasping force, will
Each raw material strong bonded, obtains the material of high-compactness after sintering, the compound cuprio carbon brush material of preparation has good rubbing
Performance and obdurability is wiped, lubricity is good, is difficult short-circuit sparking, and service life is longer.
Specific embodiment
A kind of copper-base graphite carbon brush for electric machine of high-compactness, the carbon brush material are made up of the raw material of following weight portion：Carbon is received
Meter Wei Qiu 1, natural flake graphite powder 10, metal silicon powder 2, copper powder 30, cobalt-nickel alloy powder 3, Fanglun slurry cake 2, ethanol（Analysis
It is pure）40th, stearic acid 0.4, Tris-HCl buffer solution is appropriate, Dopamine Hydrochloride 2, deionized water 50.
The preparation method of the carbon brush material is comprised the following steps：
（1）First remove in ionized water input reaction vessel, be subsequently added into Dopamine Hydrochloride, stir to which and be completely dissolved rear Deca
Tris-HCl buffer solution, regulation system pH value are 8, obtain dopamine solution standby；
（2）The dopamine solution of 30 weight portions is taken, natural flake graphite powder is added, 36h after being uniformly mixed, is stood, knot is processed
Filter after beam, product is dried after washing, obtain the modified natural flake graphite powder in surface standby；
（3）The dopamine solution of remainder amount, adds carbon nanometer micro ball, Fanglun slurry cake, stands 36h, locate after sonic oscillation dispersion 1h
Reason is filtered after terminating, and product is dried after washing, and the Fanglun slurry cake for obtaining Surface coating carbon nanometer micro ball poly-dopamine film layer is standby；
（4）By the surface modified natural crystalline graphite powder of above-mentioned preparation, the virtue of Surface coating carbon nanometer micro ball poly-dopamine film layer
Dried after synthetic fibre pulp and other leftover materials ball milling mixings 2h, is completely dried rear material Jing under 250MPa pressure full-automatic
Press band wire one-shot forming, subsequent base substrate vacuum high-temperature sintering are processed, and obtain final product described carbon brush material.
Wherein step（4）Middle base substrate vacuum high-temperature sintering condition is：Vacuum：8Pa, sintering temperature are 900 DEG C, and pressure is
5MPa, sintering time are 60min.
Made by carbon brush material performance test is carried out according to relevant criterion, test result is：
SH：21.4；Bending strength：21.7MPa；Coefficient of friction：0.10；Resistivity：0.16μΩ.m.
Claims (3)
1. a kind of copper-base graphite carbon brush for electric machine of high-compactness, it is characterised in that raw material of the carbon brush material by following weight portion
Make：Carbon nanometer micro ball 1-2, natural flake graphite powder 10-15, metal silicon powder 2-3, copper powder 30-50, cobalt-nickel alloy powder 3-5,
Fanglun slurry cake 2-5, ethanol（Analysis is pure）40-50, stearic acid 0.4-0.5, Tris-HCl buffer solution are appropriate, Dopamine Hydrochloride 2-
3rd, deionized water 50-60.
2. a kind of preparation method of the copper-base graphite carbon brush for electric machine of high-compactness as claimed in claim 1, it is characterised in that bag
Include following steps：
（1）First remove in ionized water input reaction vessel, be subsequently added into Dopamine Hydrochloride, stir to which and be completely dissolved rear Deca
Tris-HCl buffer solution, regulation system pH value are 8-8.5, obtain dopamine solution standby；
（2）The dopamine solution of 30-40 weight portions is taken, natural flake graphite powder is added, after being uniformly mixed, is stood 36-48h,
Process is filtered after terminating, and product is dried after washing, obtains the modified natural flake graphite powder in surface standby；
（3）The dopamine solution of remainder amount, adds carbon nanometer micro ball, Fanglun slurry cake, stands 36- after sonic oscillation dispersion 1-2h
48h, process are filtered after terminating, and product is dried after washing, obtain the aramid fiber slurry of Surface coating carbon nanometer micro ball-poly-dopamine film layer
The dregs of rice are standby；
（4）By the surface modified natural crystalline graphite powder of above-mentioned preparation, the virtue of Surface coating carbon nanometer micro ball-poly-dopamine film layer
Dried after synthetic fibre pulp and other leftover materials ball milling mixings 2-3h, is completely dried rear material Jing under 250-300MPa pressure
Full automatic press band wire one-shot forming, subsequent base substrate vacuum high-temperature sintering are processed, and obtain final product described carbon brush material.
3. a kind of preparation method of the copper-base graphite carbon brush for electric machine of high-compactness as claimed in claim 2, it is characterised in that institute
The step of stating（4）Middle base substrate vacuum high-temperature sintering condition is：Vacuum：8-10Pa, sintering temperature are 875-925 DEG C, and pressure is
5-10MPa, sintering time are 40-60min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610927141.7A CN106521226A (en) | 2016-10-31 | 2016-10-31 | High-density copper-based graphite motor carbon brush and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610927141.7A CN106521226A (en) | 2016-10-31 | 2016-10-31 | High-density copper-based graphite motor carbon brush and preparation method thereof |
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| CN106521226A true CN106521226A (en) | 2017-03-22 |
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| CN201610927141.7A Pending CN106521226A (en) | 2016-10-31 | 2016-10-31 | High-density copper-based graphite motor carbon brush and preparation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656385A (en) * | 2009-10-20 | 2010-02-24 | 丽水市长新电器制造有限公司 | Ultra-abrasion resistant multifunctional nano carbon brush and preparation method thereof |
| CN103219168A (en) * | 2013-03-28 | 2013-07-24 | 合肥工业大学 | Li4Ti5O12/ grapheme composite electrode material and preparation method thereof |
| CN104009366A (en) * | 2014-04-29 | 2014-08-27 | 深圳市沃特新材料股份有限公司 | Aramid fiber carbon brush manufacturing method and aramid fiber carbon brush |
| CN104388847A (en) * | 2014-12-02 | 2015-03-04 | 宁波新睦新材料有限公司 | Carbon fiber reinforced copper-based composite material and preparation method thereof |
| CN104538598A (en) * | 2015-01-06 | 2015-04-22 | 山东大学 | Simple preparation method of graphite and/or silicon negative electrode material with surface coated with carbon |
| CN105036747A (en) * | 2015-06-25 | 2015-11-11 | 合肥蓝科新材料有限公司 | Nano-hydroxyapatite-doped high-density motor carbon brush material and preparation method thereof |
| CN105603717A (en) * | 2016-01-24 | 2016-05-25 | 苏州大学 | Surface modified aramid fiber and preparation method thereof |
-
2016
- 2016-10-31 CN CN201610927141.7A patent/CN106521226A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656385A (en) * | 2009-10-20 | 2010-02-24 | 丽水市长新电器制造有限公司 | Ultra-abrasion resistant multifunctional nano carbon brush and preparation method thereof |
| CN103219168A (en) * | 2013-03-28 | 2013-07-24 | 合肥工业大学 | Li4Ti5O12/ grapheme composite electrode material and preparation method thereof |
| CN104009366A (en) * | 2014-04-29 | 2014-08-27 | 深圳市沃特新材料股份有限公司 | Aramid fiber carbon brush manufacturing method and aramid fiber carbon brush |
| CN104388847A (en) * | 2014-12-02 | 2015-03-04 | 宁波新睦新材料有限公司 | Carbon fiber reinforced copper-based composite material and preparation method thereof |
| CN104538598A (en) * | 2015-01-06 | 2015-04-22 | 山东大学 | Simple preparation method of graphite and/or silicon negative electrode material with surface coated with carbon |
| CN105036747A (en) * | 2015-06-25 | 2015-11-11 | 合肥蓝科新材料有限公司 | Nano-hydroxyapatite-doped high-density motor carbon brush material and preparation method thereof |
| CN105603717A (en) * | 2016-01-24 | 2016-05-25 | 苏州大学 | Surface modified aramid fiber and preparation method thereof |
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Application publication date: 20170322 |
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