CN1060928A - Manufacturing method of electric brush for high-speed motor - Google Patents
Manufacturing method of electric brush for high-speed motor Download PDFInfo
- Publication number
- CN1060928A CN1060928A CN 90102963 CN90102963A CN1060928A CN 1060928 A CN1060928 A CN 1060928A CN 90102963 CN90102963 CN 90102963 CN 90102963 A CN90102963 A CN 90102963A CN 1060928 A CN1060928 A CN 1060928A
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- Prior art keywords
- kilograms
- brush
- roasting
- speed motor
- hours
- Prior art date
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- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005470 impregnation Methods 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000006229 carbon black Substances 0.000 claims abstract description 4
- 239000011280 coal tar Substances 0.000 claims abstract description 4
- 239000006253 pitch coke Substances 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000002803 maceration Methods 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 238000010790 dilution Methods 0.000 claims description 3
- 239000012895 dilution Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 235000019241 carbon black Nutrition 0.000 claims 1
- 230000032696 parturition Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract description 2
- 229910021383 artificial graphite Inorganic materials 0.000 abstract 1
- 238000007865 diluting Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 5
- 238000005087 graphitization Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000006235 reinforcing carbon black Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910021514 lead(II) hydroxide Inorganic materials 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention relates to a method for manufacturing an electric brush for a high-speed motor, which is composed of spray carbon black ultra-fine graphite powder, coal tar, one-stage material powder, raw pitch coke powder, boiled pitch 1134 resin and industrial alcohol according to a proportion, wherein the electric brush has excellent performances of high wear resistance, small voltage drop and small sparks by prolonging the roasting time in the roasting process and diluting 20 percent 1134 resin impregnation liquid prepared by 80 percent industrial alcohol and artificial graphite in the impregnation process.
Description
The present invention relates to a kind of manufacture method of used in high-speed motor brush.Brush for electromachine is widely used in the high speed commutator machine.
The D374L brush of domestic production at present expects that by one stage of D308 powder, semi-reinforcing carbon black, suffering medium pitch, lead hydroxide, phosphoric acid forms.Through heat mix, roll sheet, cooling, roasting, broken green compact and the bituminizing that sieves, is pressed into geometry put into cellar for storing things roasting more again, after Overheating Treatment, form the carbon goods, again it is carried out 2500 ℃ heat treatment, form Delanium after the graphitization, make maceration extract with aluminium hydroxide and phosphorylated ligand again and carry out making with machining after the impregnation process.This brush has directly influenced the performance and the useful life of brush because the limitation of prescription and roasting, impregnation technology.When being used for high-speed electric expreess locomotive, the stable use after 300 hours, it is big to produce spark, and motor heats up high, so that motor can't normally move.The material prescription of D374L brush sees Table 1, one stage roasting temperature rise timetable and sees Table 2, and green compact temperature rise timetable sees Table 3.
Table 1:D374L brush material prescription
| Sequence number | Title material | Processing compound (kilogram) | Remarks |
| 1 | The D308-stage is expected powder | 480 | |
| 2 | Semi-reinforcing carbon black | 200 | |
| 3 | The suffering medium pitch | 320 | |
| 4 | Aluminium hydroxide | 115 | |
| 5 | Phosphoric acid | 60 |
Table 2: stage material roasting temperature rise timetable
| Temperature | Temperature rise speed | Time (hour) |
| Room temperature-500 ℃ | Freely rise | 4 |
| 500～550℃ | 25 ℃/4 hours | 8 |
| 550℃ | Keep | 24 |
| 550～850℃ | 15 ℃/4 hours | 80 |
| 850～1150 | 60 ℃/4 hours | 20 |
| 1150℃ | Keep | 48 |
Table 3: green compact roasting temperature rise timetable
| Temperature ℃ | Order of classes or grades at school | Temperature ℃ | Order of classes or grades at school | Temperature ℃ | Order of classes or grades at school | Temperature ℃ | Order of classes or grades at school |
| Room temperature-400 | 1 | 660 | 9 | 740 | 17 | 900 | 25 |
| 500 | 2 | 670 | 10 | 750 | 18 | 950 | 26 |
| 530 | 3 | 680 | 11 | 760 | 19 | 1000 | 27 |
| 560 | 4 | 690 | 12 | 770 | 20 | 1050 | 28 |
| 590 | 5 | 700 | 13 | 780 | 21 | 1100 | 29 |
| 610 | 6 | 710 | 14 | 790 | 22 | 1200 | 30 |
| 630 | 7 | 720 | 15 | 800 | 23 | Insulation | 31－36 |
| 650 | 8 | 730 | 16 | 850 | 24 |
Annotate: per tour amounted to 288 hours in inferior 8 hours
The manufacture method that the purpose of this invention is to provide a kind of used in high-speed motor brush by changing prescription, roasting and impregnation technology, makes brush have that voltage drop is little, spark is little, the good property of high abrasion, and the useful life that can improve motor.
Technical characterictic of the present invention is: a kind of prescription of used in high-speed motor brush is made up of the raw material in the table 4: (with 1000 kilograms of proportionings)
Table 4: used in high-speed motor brush prescription
| Sequence number | Title material | Processing compound (kilogram) | Remarks |
| 1 | The spraying carbon black | 45 | A-17-stage material powder |
| 2 | Special fine graphite powders | 5 | |
| 3 | Coal tar | 50 | |
| 4 | The A-17-stage is expected powder | 500 | Two-stage material powder |
| 5 | Give birth to the pitch coke powder | 250 | |
| 6 | The suffering medium pitch | 250 | |
| 7 | 1134 resins | 20 | Maceration extract |
| Industrial alcohol | 80 | Maceration extract |
Owing in the preparation of stage material powder, add the special fine graphite powders of certain proportioning, can improve the lubrification of brush, improve resistance to wear.
In roasting technique, bakes to burn the article time lengthening to 304 hour, after baking time lengthening to 480 hour.Because change stage material powder roasting temperature rise technology through test of many times, green compact roasting temperature rise technology prolongs temperature retention time, sees table 5, table 6 for details.Can prevent effectively that brush from ftractureing after roasting.In impregnation technology, the industrial alcohol of employing 80% and 20% 1134 resins dilute, and when put into the dipping cellar for storing things through the brush blank after the electrification after, pressurize in the lump in the 1134 resin suction dipping of dilution is stored and carry out impregnation process.Because the material mixture ratio in the above-mentioned prescription, roasting and impregnation technology are improved, and make its resistivity reach 23-40 ohm millimeter
2/ rice is reduced to 1.5～2.5V to the touch voltage of brush, and coefficient of friction is not more than 0.25,50 hour attrition value and is not more than 0.1 millimeter, and nominal current density is 10 amperes/centimetre
2, allowing peripheral speed 80 meter per seconds, spark is not more than 1 1/2 grades.
Advantage of the present invention is: owing to put into lubrification and the resistance to wear that the special fine graphite powders of certain proportioning has improved brush in raw material; Owing in first and second roasting technique, change the temperature control time, solved the defective of cracking in the former brush manufacturing effectively; Owing in impregnation technology, adopt industrial alcohol to dilute the maceration extract good penetrability of preparing behind 1134 resins, through with brush green compact impregnating by pressure after, mechanical strength and raising useful life that can strengthen brush.Examine through 700 hours continuous life tests of row in the lump with the present invention motor brush of making (A-17) and the C-1 brush that Japan makes through No.20 Inst., Ministry of Machine-Building and Electronics Industry, conclusion is: " aspects such as spark, useful life can reach the advanced level of Japanese C-1 brush, maintain the leading position at home ".Therefore the alternative imported product of A-17 brush of the present invention's manufacturing has highly application value.Its main performance index comparison of test results sees Table 7.
Embodiments of the invention: the manufacture method that exemplifies the A-17 brush.Its formula for raw stock is seen the table 4 in the technical characterictic, presses the proportion ingredient of 1000 kilograms of unit product net weight.At first will spray carbon black, special fine graphite powders, coal tar adds the two slurry mixing machines of 500 liters in proper order by the ascending principle of proportion, heat mixed, and when mixed the adding binding agent.Behind the temperature and time that reaches routine, the powered-down discharging.Have plasticity, be easy to die mould by the mixed material powder that makes, improve the compaction rate of material powder.Pour the material powder into flaking machine and roll into the thick tablet of 5mm earlier, reroll into the thick tablet of 2mm.Reach the air that expels in the material powder by rolling sheet, make tablet closely knit, improve suppression performance, reduce the required unit pressure of compacting.Tablet after rolling is placed on natural cooling or forced ventilation cooling in the case, with cooled tablet send into universal mill routinely milling process oarse-grained tablet is ground the granularity of process stipulation.Material powder after grinding is put into hanger supported shaking screen, sieve, remove bulky grain and exogenous impurity in the material powder.300 tons hydraulic presses are good by proportion, the pressure debugging of the green compact of process stipulation, the material powder with mark of conformity is put into hydraulic press, by compacting binder is pressed under certain pressure is suppressed have certain geometrical shape, the green compact of certain weight proportion.Green compact are packed into carry out the phase I roasting in the cellar for storing things, the temperature and time of one stage material roasting is seen the table 5 in the technical characterictic.Put into broken again impurity and the bulky grain removed of disintegrating machine after the cooling, become stage material powder, give birth to asphalt powder with 50% stage material powder, 25% again, 25% medium pitch is broken again, pressed compact after mixed, the hot rolling sheet of heat, the cooling again, carry out the roasting second time, the temperature and time of its roasting is seen the table 6 in the technical characterictic.Prolong the temperature retention time of temperature by after baking, solved former manufacturing center brush problem easy to crack after roasting.By after baking, improved the mechanical strength of goods; Reduce resistance, strengthen anti-wear performance.Handle the back through roasting heat and form the carbon goods, again the carbon goods are placed in the graphitizing furnace energising and by the high-temperature process more than 2500 ℃, pass through graphitization, improve the conductivity of heat and electricity, improve chemical stability, despumation improves purity, improves abrasion resistance, reduce hardness, improve machining property.The Delanium that forms after graphitization carries out impregnation technology again, and 1134 resins of the industrial alcohol dilution 20% with 80% are mixed with maceration extract, and the Delanium after graphitization is put into the dipping cellar for storing things, vacuumizes earlier, then with in the maceration extract suction cellar for storing things.Closed shutter pressurizes 8 kilograms, and pressurize was opened dipping Jiao Gai and taken out goods greater than 5 hours, put into baking oven, low temperature drying.Require to be machined into the brush of various how much shapes again according to product design document.
Table 5: one-phase material roasting temperature rise timetable
| Temperature | Temperature rise rate | Time (hour) |
| Room temperature-500 ℃ | Freely rise | 8 |
| 500℃～550℃ | 25 ℃/8 hours | 16 |
| 550℃ | Keep | 48 |
| 550℃～850℃ | 15 ℃/8 hours | 120 |
| 850～1150℃ | 60 ℃/8 hours | 40 |
| 1150℃ | Keep | 72 |
Table 6: green compact roasting temperature rise timetable
| Temperature ℃ | Order of classes or grades at school | Temperature ℃ | Order of classes or grades at school | Temperature ℃ | Order of classes or grades at school | Temperature ℃ | Order of classes or grades at school |
| Room temperature-400 | 1 | 660 | 9 | 740 | 17 | 900 | 25 |
| 500 | 2 | 670 | 10 | 750 | 18 | 950 | 26 |
| 530 | 3 | 680 | 11 | 760 | 19 | 1000 | 27 |
| 560 | 4 | 690 | 12 | 770 | 20 | 1050 | 28 |
| 590 | 5 | 700 | 13 | 780 | 21 | 1100 | 29 |
| 610 | 6 | 710 | 14 | 790 | 22 | 1200 | 30 |
| 630 | 7 | 720 | 15 | 800 | 23 | Insulation | 31～50 |
| 650 | 8 | 730 | 16 | 850 | 24 |
Annotate: per tour 8 hours, public meter 400 hours
Claims (2)
1, a kind of manufacture method of used in high-speed motor brush is characterized in that brush is made up of spraying 45 kilograms of carbon blacks, 5 kilograms of special fine graphite powders, 50 kilograms in coal tar, a stage 500 kilograms in powder of material, the proportioning of giving birth to 250 kilograms of pitch coke powders, 250 kilograms of suffering medium pitch, 20 kilograms of 1134 resins, 80 kilograms of industrial alcohol.
2, a kind of manufacture method of used in high-speed motor brush is characterized in that the bakes to burn the article time is 304 hours in roasting technique, and temperature rise is from 500 ℃～1150 ℃, and the after baking time is 480 hours, and temperature rise is from 400 ℃～1200 ℃; In impregnation technology, the maceration extract and the Delanium of the 1134 resins preparation of the industrial alcohol dilution 20% with 80% are put into the dipping cellar for storing things, and vacuum pressed, pressurize are handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102963 CN1029715C (en) | 1990-10-22 | 1990-10-22 | Manufacturing method of electric brush for high-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102963 CN1029715C (en) | 1990-10-22 | 1990-10-22 | Manufacturing method of electric brush for high-speed motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060928A true CN1060928A (en) | 1992-05-06 |
| CN1029715C CN1029715C (en) | 1995-09-06 |
Family
ID=4877834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90102963 Expired - Fee Related CN1029715C (en) | 1990-10-22 | 1990-10-22 | Manufacturing method of electric brush for high-speed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029715C (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074875A (en) * | 2009-11-19 | 2011-05-25 | 杨长根 | Method for manufacturing electric brush used for industrial motor |
| CN102130407A (en) * | 2010-12-24 | 2011-07-20 | 苏州东南碳制品有限公司 | Carbon brush for truck starting motor as well as manufacture method and application thereof |
| CN102324681A (en) * | 2011-06-02 | 2012-01-18 | 朱伟 | Production method of conductive anti-friction material of electric brush |
| CN102468587A (en) * | 2010-11-19 | 2012-05-23 | 苏州东豪碳素有限公司 | Series-excitation AC (Alternating Current) motor brush for soybean milk maker/juice extractor |
| CN102882100A (en) * | 2012-10-26 | 2013-01-16 | 海门市通达碳业有限公司 | Manufacturing method for electric brush |
| CN102904143A (en) * | 2012-10-26 | 2013-01-30 | 海门市通达碳业有限公司 | Production process of electric brush |
| CN102035118B (en) * | 2009-09-30 | 2013-09-18 | 苏州东豪碳素有限公司 | Manufacturing formula of electric brush for series-excitation AC-DC washing motor |
| CN103811970A (en) * | 2012-11-12 | 2014-05-21 | 钱俊勇 | Production technology for anti-corrosion brush |
| CN103811971A (en) * | 2012-11-12 | 2014-05-21 | 钱俊勇 | Production process for high temperature resistant electric brush |
| CN104993349A (en) * | 2015-06-25 | 2015-10-21 | 合肥蓝科新材料有限公司 | Low-spark anti-ablation motor carbon brush material and preparation method thereof |
| CN104993348A (en) * | 2015-06-25 | 2015-10-21 | 合肥蓝科新材料有限公司 | High-wear-resisting anti-static motor carbon brush material blended with nanometer ferroferric oxide and preparation method of motor carbon brush material |
| CN105098561A (en) * | 2014-05-04 | 2015-11-25 | 苏州东南碳制品有限公司 | Preparation method of hybrid electric vehicle starting motor carbon brush and application of carbon brush |
| CN106033858A (en) * | 2015-03-18 | 2016-10-19 | 苏州东南电碳科技有限公司 | Carbon brush used for locomotive traction motor |
| CN106033862A (en) * | 2015-03-18 | 2016-10-19 | 苏州东南电碳科技有限公司 | Manufacturing method of carbon brush used for locomotive traction motor |
| CN106032328A (en) * | 2015-03-18 | 2016-10-19 | 苏州东南电碳科技有限公司 | Material for preparing locomotive traction motor carbon brush |
| CN106350006A (en) * | 2016-07-19 | 2017-01-25 | 邢台翔九石墨制造有限公司 | Graphite sealing material and preparation method thereof |
| CN109004482A (en) * | 2018-07-24 | 2018-12-14 | 美尔森哈碳电碳（哈尔滨）有限公司 | A kind of railway brush for electromachine and preparation method thereof |
| CN114824989A (en) * | 2022-03-09 | 2022-07-29 | 哈尔滨电碳厂有限责任公司 | Preparation method of high-wear-resistance metal graphite electric brush |
-
1990
- 1990-10-22 CN CN 90102963 patent/CN1029715C/en not_active Expired - Fee Related
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035118B (en) * | 2009-09-30 | 2013-09-18 | 苏州东豪碳素有限公司 | Manufacturing formula of electric brush for series-excitation AC-DC washing motor |
| CN102074875A (en) * | 2009-11-19 | 2011-05-25 | 杨长根 | Method for manufacturing electric brush used for industrial motor |
| CN102468587B (en) * | 2010-11-19 | 2013-11-27 | 苏州东豪碳素有限公司 | Series-excitation AC (Alternating Current) motor brush for soybemilk maker/juice extractor |
| CN102468587A (en) * | 2010-11-19 | 2012-05-23 | 苏州东豪碳素有限公司 | Series-excitation AC (Alternating Current) motor brush for soybean milk maker/juice extractor |
| CN102130407B (en) * | 2010-12-24 | 2012-08-22 | 苏州东南碳制品有限公司 | Carbon brush for truck starting motor as well as manufacture method and application thereof |
| CN102130407A (en) * | 2010-12-24 | 2011-07-20 | 苏州东南碳制品有限公司 | Carbon brush for truck starting motor as well as manufacture method and application thereof |
| CN102324681A (en) * | 2011-06-02 | 2012-01-18 | 朱伟 | Production method of conductive anti-friction material of electric brush |
| CN102904143A (en) * | 2012-10-26 | 2013-01-30 | 海门市通达碳业有限公司 | Production process of electric brush |
| CN102882100A (en) * | 2012-10-26 | 2013-01-16 | 海门市通达碳业有限公司 | Manufacturing method for electric brush |
| CN103811970A (en) * | 2012-11-12 | 2014-05-21 | 钱俊勇 | Production technology for anti-corrosion brush |
| CN103811971A (en) * | 2012-11-12 | 2014-05-21 | 钱俊勇 | Production process for high temperature resistant electric brush |
| CN105098561A (en) * | 2014-05-04 | 2015-11-25 | 苏州东南碳制品有限公司 | Preparation method of hybrid electric vehicle starting motor carbon brush and application of carbon brush |
| CN106033862B (en) * | 2015-03-18 | 2018-07-13 | 苏州东南佳新材料股份有限公司 | A kind of preparation method of locomotive traction motor carbon brush |
| CN106032328B (en) * | 2015-03-18 | 2018-12-07 | 苏州东南佳新材料股份有限公司 | A kind of material being used to prepare locomotive traction motor carbon brush |
| CN106033858A (en) * | 2015-03-18 | 2016-10-19 | 苏州东南电碳科技有限公司 | Carbon brush used for locomotive traction motor |
| CN106033862A (en) * | 2015-03-18 | 2016-10-19 | 苏州东南电碳科技有限公司 | Manufacturing method of carbon brush used for locomotive traction motor |
| CN106032328A (en) * | 2015-03-18 | 2016-10-19 | 苏州东南电碳科技有限公司 | Material for preparing locomotive traction motor carbon brush |
| CN106033858B (en) * | 2015-03-18 | 2018-07-13 | 苏州东南佳新材料股份有限公司 | A kind of locomotive traction motor carbon brush |
| CN104993348A (en) * | 2015-06-25 | 2015-10-21 | 合肥蓝科新材料有限公司 | High-wear-resisting anti-static motor carbon brush material blended with nanometer ferroferric oxide and preparation method of motor carbon brush material |
| CN104993349A (en) * | 2015-06-25 | 2015-10-21 | 合肥蓝科新材料有限公司 | Low-spark anti-ablation motor carbon brush material and preparation method thereof |
| CN106350006B (en) * | 2016-07-19 | 2017-07-04 | 河北翔九石墨股份有限公司 | Graphite sealing material and preparation method thereof |
| CN106350006A (en) * | 2016-07-19 | 2017-01-25 | 邢台翔九石墨制造有限公司 | Graphite sealing material and preparation method thereof |
| CN109004482A (en) * | 2018-07-24 | 2018-12-14 | 美尔森哈碳电碳（哈尔滨）有限公司 | A kind of railway brush for electromachine and preparation method thereof |
| CN109004482B (en) * | 2018-07-24 | 2019-07-16 | 美尔森哈碳电碳（哈尔滨）有限公司 | A kind of railway brush for electromachine and preparation method thereof |
| CN114824989A (en) * | 2022-03-09 | 2022-07-29 | 哈尔滨电碳厂有限责任公司 | Preparation method of high-wear-resistance metal graphite electric brush |
| CN114824989B (en) * | 2022-03-09 | 2024-01-30 | 哈尔滨电碳厂有限责任公司 | Preparation method of high-wear-resistance metal graphite brush |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029715C (en) | 1995-09-06 |
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