CN1049428A - The metal-filled graphite brush of miniature motor and manufacture method thereof - Google Patents
The metal-filled graphite brush of miniature motor and manufacture method thereof Download PDFInfo
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- CN1049428A CN1049428A CN 90106992 CN90106992A CN1049428A CN 1049428 A CN1049428 A CN 1049428A CN 90106992 CN90106992 CN 90106992 CN 90106992 A CN90106992 A CN 90106992A CN 1049428 A CN1049428 A CN 1049428A
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Abstract
Carry out electric current commutation and a kind of metal-filled graphite brush that the magneto miniature motor that rotates is used via commutator, make by bonding graphite powder, in order to described commutator sliding contact, to carry out electric current commutation, wherein metal-filled graphite brush is by the highly purified graphite powder and the mixture compression moulding and the sintering of metal powder are made; The graphite powder that metal-filled graphite brush is used makes its content of ashes become to reduce to 0.05% weight through purifying.The invention still further relates to the method for making this metal-filled graphite brush.
Description
The present invention generally speaking relates to a kind of carbon brush and the manufacture method thereof that minitype permanent magnetism formula motor is used, more particularly, relate to a kind of carbon brush of miniature motor, this carbon brush is the electrographite brush that is filled with metal, commutation ability and anti-wear performance are all excellent, and the ability of anti-environmental corrosion increases.It is made like this: graphite powder is purified to its content of ashes reduces to less than 0.05% weight, regulate the granularity of the back graphite powder of purifying, graphite powder is mixed with metal powder, then mixture is suppressed tomahawk's shape and sintering.
So far, the carbon brush of miniature motor is to make like this: adhesive is added to is purified in about 98% or 99.5% the graphite powder, milling also screens fixed mixture, to mix with metal powder through the mixture of milling and screening, make it have desired conductance, then with the mixture press forming and the sintering that draw.
Figure 10 illustration the carbon brush of miniature motor to adopt purity be the general manufacture process of 98% to 99.5% graphite powder.
As shown in FIG., the manufacture process of carbon brush is: add adhesive in the graphite powder that is purified to 98% to 99.5% purity, milling also screens fixed graphite adhesive mixture, to mix with metal powder through the mixture of milling and screening, make it have desired conductance, then the mixture that draws of press forming and sintering.
In order not use adhesive, a kind of copper-plated electrographite brush that is called is arranged as everybody knows.This copper-plated graphite brush is to be purified to the graphite powder particle copper facing of about 99% purity, need not add adhesive then and will plate that the graphite powder press forming of copper and sintering make.
General metal-filled graphite brush is that native graphite is directly mixed with adhesive, and milling and screening mixture are made.The SiO that 0.5 to 1.0% weight is only just arranged in direct mixed process
2, Al
2O
3, Fe
2O
3, silicate, MnO, MgO and other oxide remain in the graphite as the form of impurity with ash content.
Figure 11 is included in the zoomed-in view of the ash content (impurity) in the graphite.
Even in graphite powder, add the metal-filled graphite brush that adhesive is made with above-mentioned purity, its anti-environment is rotten, and solely ability is also fine, because reduced remaining amount of binder during sintering, and the little metallic of surface area suffers the erosion of corrosive gas and oxidated possibility smaller.
The carbon brush of copper facing and other metal, porosity is 10% to 30%.This makes the surface area of film metal become big, causes being very easy to be subjected to the erosion of oxidation and corrosive gas.
Like this, the impurity that residual quantity is bigger tends to damage the lubricating film in the commutation, quickens the wearing and tearing of brush, and makes the commutation ability variation.
Figure 12 is the waveform of general metal-filled graphite brush on oscilloscope.Obviously the waveform of motor current is very irregular among the figure.Along with the continuous wearing and tearing of carbon brush, be included in insulating material in the carbon brush and appear on the slidingsurface between carbon brush and the commutator, make the commutation ability variation, also can make motor failure when serious.
The purpose of this invention is to provide metal-filled graphite brush and manufacture method thereof that good, the anti-environmental corrosion ability of a kind of commutation ability that miniature motor uses increases, wherein metal-filled graphite brush mainly is that employing purification process in the purification process operation arrives less than 0.05% weight content of ashes graphite powder, after granularity is regulated, mix with metal powder, press forming and sintering are made then.
Another object of the present invention provides metal-filled graphite brush and the manufacture method thereof that good, the anti-environmental corrosion ability of a kind of commutation ability that miniature motor uses increases, wherein metal-filled graphite brush mainly is by the oxide particle of adding 0.1 to 10.0% weight granularity in the graphite powder through purifying less than 50 microns, regulate the granularity of mixture then, mixture is mixed with metal powder, then the mixture press forming that draws and sintering are made.
Another object of the present invention provides metal-filled graphite brush and the manufacture method thereof that good, the anti-environmental corrosion ability of a kind of commutation ability that miniature motor uses increases, wherein metal-filled graphite brush mainly is by wear-resisting, the conduction powder of the about 15% weight granularity of adding in the graphite powder through purifying less than 50% micron, after regulating the granularity of mixture, mixture is mixed with metal powder, then that the mixture press forming and the sintering that draw is produced.
Fig. 1 is the schematic diagram of explanation present principles of the present invention.
Fig. 2 is the flow chart of the basic manufacture method of explanation the present invention.
Fig. 3 is the schematic diagram of employed purifying furnace in the explanation purification process operation of the present invention.
Fig. 4 is the oscillogram of commutation waveform on oscilloscope that metal-filled graphite brush of the present invention (first kind of carbon brush) is implemented in explanation.
Fig. 5 is the granularity of oxide addition and the result of the test data of the relation between the degree of wear among another embodiment (second kind of carbon brush) of explanation metal-filled graphite brush of the present invention.
Fig. 6 is the result of the test of the relation between oxide addition content and the degree of wear in explanation second kind of carbon brush of the present invention.
Fig. 7 is the result of the test data that compare in order to the degree of wear with the degree of wear of another embodiment (the third carbon brush) of metal-filled graphite brush of the present invention and other carbon brush.
Fig. 8 is the result of the test data of the relation between carbon thing additive level and the degree of wear in explanation the third carbon brush of the present invention.
Fig. 9 is the result of the test data of the relation between carbide additive particle size and the degree of wear in explanation the third carbon brush of the present invention.
Figure 10 is that the explanation prior art is filled the flow chart of metallic graphite carbon manufacture process.
Figure 11 is the structure chart of the content of ashes (impurity) of the graphite handled with the prior art manufacturing process.
Figure 12 is the waveform of prior art metal-filled graphite brush commutation waveform on oscilloscope.
Fig. 1 is the schematic diagram of aid illustration basic principle of the present invention, and the metal-filled graphite brush (to call carbon brush in the following text) that shows miniature motor is used in the situation of miniature motor, and the perspective view (A-1) of people's carbon brush also is shown among the figure.
Among Fig. 1, numbering 1 expression commutation, 2 expression commutator segments, 3 expression rotating shafts, 4 expression carbon brush, 5 expression carbon brush elastic components.
Among Fig. 1, carbon brush 4 by the conduction carbon brush elastic component 5 clamp, and with commutator segment 2,2 and 2 sliding contacts supporting.Carbon brush 4 sinters inverted T-shape into, and the bar of inverted T-shape is being supported by carbon brush elastic component 5, as shown in the A-1 perspective view of Fig. 1.The lower surface slight curvature of inverted T-shape, so as with commutator segment 2 sliding contacts.
Fig. 2 is the flow chart of the basic manufacture process of explanation the present invention.Numbering 20 expressions among the figure are purified to about graphite powder of 99% to 99.5%, and 21 for the present invention is the purification process operation, and 22 is the adhesive treatment operation, and 25 is the press forming operation, and 26 is sintering circuit.
Carbon brush of the present invention as shown in Figure 2, forms by graphite powder being carried out following series of processes manufacturing: purification process operation 21, adhesive treatment operation 22, press forming operation 25 and sintering circuit 26.Here, adhesive treatment operation 22, press forming operation 25 and sintering circuit 26 are that everybody is familiar with, thereby repeat no more, but purification process operation 21 is main features of the present invention, describes in detail below with reference to Fig. 3.
Fig. 3 is the schematic diagram of employed purifying furnace in the purification process operation of the present invention.Among the figure, numbering 20 is graphite powders; The 30th, purifying furnace itself, the 31st, power transformer, the 32nd, halide torch, 33 is heater.
The purification process operation is with resembling CCl
4Or CCl
2F
2Deng the impurity in the mass treatment graphite that can emit halogen, these materials at high temperature are easy to emit halogen in the inert gas such as nitrogen or argon.That is to say, graphite powder 20 is charged in the purifying furnace body 30 that halogen gas pipe 32 is promptly put into graphite powder 20 in purifying furnace body 30.When the temperature in purifying furnace is brought up to 1,800 ℃ of left and right sides by heater 33, satisfied CCl in inert gas
4Present by halide torch 32.In the case, can think following reaction takes place in the purifying furnace:
When temperature rises to more than 1900 ℃, use CCl
2F
2Replace CCl
4, purification process continues more than 4 hours in the temperature more than 2500 ℃.In next step refrigerating work procedure, keep in case impurity returns diffusion, and halogen being removed with the inert gas purge that resembles nitrogen or argon and so on.
After this purification process operation, the graphite of producing reaches the above purity of 99.95% weight, and impurity is less than 0.05% weight.
Fig. 4 is the oscillogram of commutation waveform on oscilloscope with the produced carbon brush of basic manufacturing process shown in Figure 2 (to call first kind of carbon brush in the following text).Under the situation of first kind of carbon brush of the present invention, its commutation waveform the time occurs regularly in commutation, and this point shows very clearly at the waveform figure shown in Fig. 4, not as the commutation waveform of the prior art carbon brush shown in Figure 12.This illustrates the commutating characteristics excellence of first kind of carbon brush of the present invention.
As mentioned above, why can produce the stable and excellent carbon brush of commutation ability is because this carbon brush is by graphite powder is purified in the purification process operation of basic manufacturing process of the present invention, make its impurity content extremely low, metal powder is mixed with graphite powder, again mixture press forming and sintering are made.Because the carbon content of adhesive is low, and the surface area of metal powder particle is little, thereby the possibility of generation oxidation is little, thereby makes carbon brush have the ability of good anti-environmental corrosion.
Remove and to carry out the purity that the purification process operation is filled graphite used in the metallic graphite carbon carbon brush with raising, and outside the motor that these carbon brush are housed tested, the inventor once adopted following method to make metal-filled graphite brush.
(ⅰ) physical purification
By the suspension operation of utilizing the difference on the solid particle surfaces physical and chemical performance impurity is separated from graphite.The physical purification operation can be handled the about 300 microns particle of granularity.The characteristics of utilizing graphite to separate with bubble charge into graphite powder in the mixture of oil and air bubble, impel graphite particle to adhere on the bubble of suspension then and are collected.This operation can make purity be not less than 98% and be lower than 99.5%.In other words, in the graphite powder content of impurity greater than 0.5% to about 2.0%.
(ⅱ) chemical treatment
The impurity that is included in the graphite is dissolved in the bronsted lowry acids and bases bronsted lowry solution of high concentration, then with solution heating (to 160 ℃～170 ℃) and pressurization (to 5～6 atmospheric pressure).This processing procedure is called hot pressing process usually, and it mainly comprises following reaction:
Through this chemical treatment, the purity that obtains is not less than 99%, but is lower than 99.9%, is higher than 0.05%, about 1.0% impurity and remains in the graphite powder.
This shows that the graphite purity that draws with above-mentioned physics and chemical purification operation is than the graphite purity difference that draws through purified treatment operation of the present invention.That is to say, can not draw highly purified graphite with above-mentioned physics and chemical purification method.
Introduce another embodiment (to call second kind of carbon brush in the following text) and the manufacture method thereof of carbon brush of the present invention below.Second kind of carbon brush and manufacture method thereof haply with identical referring to figs. 1 through 4 described first kind of carbon brush previously.The anti-wear performance of second kind of carbon brush is better than first kind of carbon brush.This is by adopting oxide (SiO for example
2, Al
2O
3, Fe
2O
3, MnO, MgO, TiO, silicate etc.) as attrition resistant materials, force to add about 0.1～10% weight granularity less than 50 microns oxide, again mixture is carried out the adhesive treatment operation and each later operation 23-26 realizes.Adopt by the produced metal-filled graphite brush of these operations, just can make miniature motor have excellent commutating characteristics and anti-wear performance.Above-mentioned oxide can add in metal powder mixed processes 24.
Fig. 5 shows the particle size range of the oxide in the adhesive treatment operation 22 that should join among Fig. 2 and the result of the test of the relation between the degree of wear.Fig. 6 shows the degree of wear by changing oxide content but the result of the test of the granularity that keeps oxide below 50 microns the time.
Result of the test shown in Fig. 5 and 6 represents ten carbon brush goods of each test number are reached most the result of the test of 80 hours operation test.Symbol X represents the time that carbon brush damages.
Can obviously find out from Fig. 5, reduce wear rate, the granularity of oxide powder must remain on (No. 2 tests) below 50 microns.That is to say, not (No. 1 test) during oxygenates, wear rate uprises.(No. 3 tests) just had four carbon brush to damage in the short time (average out to 24 hours) when the oxide granularity was 50～60 microns.Under the situation of other granularity (4 to No. 7 tests), all carbon brush (average out to 3.2～4.3 hours) damages in a short period of time.
In fact oxidate powder content (No. 1 to No. 6 test) when 0.1～10.0% weight do not produce any problem, because the degree of wear is still in 41% to 67% scope.This point can be seen clearly from Fig. 6.But oxidate powder content is (No. 7 tests) during up to 12.0% weight, and all carbon brush damage.
On the basis of above-mentioned result of the test, second kind of carbon brush of the present invention made by improving commutation ability in so-called pretreatment process, promptly in the purification process operation 21 of pretreatment process shown in Figure 2, the purity of graphite powder is brought up to (thereby impurity is less than 0.05%) more than 99.95%, and in adhesive treatment operation 22, improve resistance to wear, in adhesive treatment operation 22, graphite powder is not only the same with prior art fixed in addition with adhesive, and also added 0.1-10% weight granularity in the adhesive less than 50 microns oxide.
Another embodiment (to call the third carbon brush in the following text) and the manufacture method thereof of carbon brush of the present invention are described now.The third carbon brush and manufacture method thereof be identical with previous described first kind and second kind carbon brush in fact.The third carbon brush is compared anti-wear performance and electric conductivity excellence with first kind with second kind of carbon brush.The third carbon brush is produced like this: adding 0.1 to 15.0% weight granularity is (for example main by following wherein one or more carbide of forming: TiC, ZrC, HfC, VC, NbC, TaC, Cr less than 50 microns wear-resisting and conductive materials
3C
2, MoC, WC), in the adhesive treatment operation 22 of the basic manufacturing process shown in Fig. 2, mixture is carried out adhesive treatment and other later operation 23-26 then.So produced the third carbon brush commutation ability, anti-wear performance and electric conductivity are all good.Above-mentioned carbide can add in metal powder mixed processes 24.
Fig. 7 shows and only adds the not additivated carbon brush of adhesive (No. 1 test) in the graphite powder that is purified to 99.96% purity in purification process operation 21 to having, is added with oxide (SiO for example
2, Al
2O
3, Fe
2O
3, MnO, MgO, TiO, silicate etc.) and the carbon brush (No. 2 tests) made and be added with conductive carbide and result that the motor of the carbon brush made (No. 3 test) is tested respectively.
These tests are to make the miniature motor running with above-mentioned carbon brush carry out for 80 hours.In this test, when making carbon brush.Added 3% weight granularity in the adhesive less than 50 microns oxide or carbide.
As shown in Figure 7, the carbon brush what does not add, its wear rate reaches 100%, has added the carbon brush of oxide, and wear rate is 33%, has added the carbon brush of carbide, and wear rate is 19%.In other words, add the resistance to wear that carbide can improve carbon brush.
Fig. 8 shows the result that the carbon brush that add different amount carbide (granularity is less than 50 microns) are tested, and its objective is the situation that wear rate changes with the variation of the carbide amount that is added of making clear.In the case, ten carbon brush are that the different carbide of measuring of adding are produced, and stand to reach most 80 hours operation test.Symbol X among the figure represents the time that carbon brush damages.
As shown in the figure, the carbon brush wear rate after moving 80 hours that has added 0.5% weight carbide is 32%, has added the carbon brush of 1.0-15.0% weight carbide, and wear rate is lower, only is 20～26%.During carbide addition 20% weight, the commutator wear rate is high, so that all miniature motors all shut down.
The addition of this explanation carbide is preferably in the scope of 1.0-15.0% weight.
Fig. 9 shows the carbide addition is kept constant (3% weight) but result that carbon brush when changing its granularity carries out the wear rate test.
As can be seen from the figure, having added the carbon brush of granularity less than 50 microns carbide, is 22% at the wear rate of operation after 80 hours, and the granularity of institute's carbide-containing is at the carbon brush of 50～74 micrometer ranges, and its wear rate is 20%.The carbide granularity is when the scope of 105-149 micron, and the wear rate of carbon brush is 30%, reaches 53 hours to the average moving commentaries on classics time weak point of motor failure.The carbide granularity is when the 149-174 micrometer range, and the carbon brush wear rate obviously increases, all as a result motor nearly all malfunctioning (Average Operation Time to motor failure is 38 hours).
Optimal granularity and the carbide addition determined according to above-mentioned result of the test are respectively less than 50 microns scopes with 0.1-15.0% weight.
In this embodiment, the carbonization system is as the wear-resistant conductive material, but the wear-resistant conductive material is not limited to carbide.Adopt nitride (for example TiN, ZrN, NbN, TaN, Cr
2N, VN etc.), boride (TiB for example
2, ZrBV
2, NbB
2, TaB
2, CrB, MoB, WB, LaB, VB
2Deng) or silicide (TiSi for example
2, ZrSi
2, NbSi
2, TaSi
2, CrSi
2, MoSi
2, WSi
2Deng) also can obtain similar effects.
In addition, two or more above-mentioned carbide, nitride, boride or silicide are combined use and also can obtain similar effect.
As mentioned above, the third carbon brush of the present invention can be realized the effect of the metal-filled graphite brush that anti-wear performance and electric conductivity increase, this is to make by improve commutation ability in so-called pretreating process because of the third carbon brush of the present invention, in this pretreating process, in the purification process operation 21 before later each operation shown in Figure 2, the purity of graphite powder brings up to that (thereby impurity is less than 0.05% weight more than 99.95%, in adhesive treatment operation 22 or metal powder mixed processes 24, the wear-resistant conductive material that has added 0.1-15.0% weight in the adhesive, thereby anti-wear performance and electric conductivity all increase.
Claims (12)
1, a kind of being used for carried out electric current commutation and the metal-filled graphite brush of the magneto miniature motor that rotates via commutator, make by bonding graphite powder, in order to described commutator sliding contact, to carry out the electric current commutation, it is characterized in that, described metal-filled graphite brush is produced like this: described graphite powder is purified, described graphite powder is mixed with metal powder, then with the mixture press forming and the sintering of described graphite powder and described metal powder; The used described graphite powder of described metal-filled graphite brush makes its content of ashes be not more than 0.05% weight through purifying.
2, the metal-filled graphite brush used of miniature motor as claimed in claim 1, it is characterized in that, described metal-filled graphite brush is by being not more than 50 microns oxide toward adding 0.1 to 10.0% weight granularity during the described content of ashes that is purified to as the impurity in the described graphite powder is not more than the graphite powder of 0.05% weight in adhesive treatment or metal mixed operation, then described graphite and described hopcalite press forming and sintering is made.
3, the metal-filled graphite brush used of miniature motor as claimed in claim 1, it is characterized in that, described metal-filled graphite brush is by in adhesive treatment or metal powder mixed processes, add 0.1 to 15.0% weight granularity in the graphite powder that content of ashes as the impurity in the described graphite powder is not more than 0.05% weight and be not more than 50 microns wear-resistant conductive material toward being purified to, then with described graphite and described wear-resistant conductive mixtures of material press forming and sintering.
4, the metal-filled graphite brush used of micromotor as claimed in claim 2 is characterized in that, described oxide is for mainly by SiO
2, Al
2O
3, Fe
2O
3, the impurity formed such as MnO, MgO, PiO, silicate.
5, the metal-filled graphite brush used of miniature motor as claimed in claim 3 is characterized in that, described wear-resistant conductive material is mainly by one or more TiC, ZrC, HfC, VC, NbC, TaC, Cr
3C
2, the carbide formed such as MoC, WC.
6, the metal-filled graphite brush used of miniature motor as claimed in claim 3 is characterized in that, described wear-resistant conductive material is mainly by one or more TiN, ZrN, NbN, TaN, Cr
2The nitride that N, VN, WC etc. form.
7, the metal-filled graphite brush used of miniature motor as claimed in claim 3 is characterized in that, described wear-resistant conductive material is mainly by one or more TiB
2, ZrB
2, NbB
2, TaB
2, CrB, MoB, WB, LaB, VB
2Deng the boride of forming.
8, the metal-filled graphite brush used of miniature motor as claimed in claim 3 is characterized in that, described wear-resistant conductive material is mainly by one or more TiSi
2, ZrSi
2, NbSi
2, TaSi
2, CrSi
2, MoSi
2, WSi
2Deng the silicide of forming.
9, a kind of manufacturing is used for carrying out electric current commutation and the method for the metal-filled graphite brush of the magneto miniature motor that rotates via commutator, this electrographite brush is made by bonding graphite powder, in order to described commutator sliding contact, to advance the electric current commutation, it is characterized in that described metal-filled graphite brush is by fulfiling the manufacturing of following operation:
The purification process operation is in order to use the material purification graphite powder that can emit the fontanel element in high temperature inert atmosphere;
Milling and screening process, with adding adhesive in the described graphite powder of having purified in the past, milling and screen the described graphite powder of having purified and the mixture of described adhesive then;
The metal powder mixed processes is in order to mix with described metal powder through the graphite powder of purifying and screen;
The press forming operation is in order to the mixture press forming with described graphite powder and described metal powder; With
Sintering circuit is in order to the described press forming spare of sintering.
10, the manufacture method of the metal-filled graphite brush used of miniature motor as claimed in claim 9, it is characterized in that described metal-filled graphite brush is to be not more than 50 microns oxidate powder and to make by add 0.1 to 10% weight granularity in described adhesive treatment or metal powder mixed processes.
11, the manufacture method of the metal-filled graphite brush used of miniature motor as claimed in claim 9, it is characterized in that described metal-filled graphite brush is to be not more than 50 microns wear-resistant conductive material and to make by add 0.1 to 15% weight granularity in described adhesive treatment or metal powder mixed processes.
12, the manufacture method of the metal-filled graphite brush used of miniature motor as claimed in claim 9 is characterized in that, described purification process operation is to adopt the purification stove of the heater that an intensification usefulness is arranged to carry out; Described purification process operation divided for four steps, and the first step is to make CCl
4Saturated and when furnace temperature reaches about 1800 ℃, be fed to and make it take place learn reaction in the described graphite powder in inert gas, promptly
Second step was with CCl
2F
2Replaced C Cl
4, it is embezzled respectively and when furnace temperature surpasses 1900 ℃ at inert gas is fed in the described graphite powder; The 3rd step was to be raised to situation more than 2500 ℃ this purification process of ordering in furnace temperature to proceed down, lasted more than 4 hours; The 4th step then made in the stove after finishing for the 3rd step and cooling down together with described graphite powder; In the 4th step, continue to carry N or Ar to carry out purge,, and remove halogen in case impurity returns diffusion.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20946189 | 1989-08-11 | ||
| JP209459/89 | 1989-08-11 | ||
| JP20945989A JPH0374159A (en) | 1989-08-11 | 1989-08-11 | Metal graphite brush for small-sized motor and manufacture thereof |
| JP209460/89 | 1989-08-11 | ||
| JP209461/89 | 1989-08-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049428A true CN1049428A (en) | 1991-02-20 |
| CN1024611C CN1024611C (en) | 1994-05-18 |
Family
ID=26517461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106992 Expired - Fee Related CN1024611C (en) | 1989-08-11 | 1990-08-11 | Metal-filled graphite brush for miniature motors and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024611C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062841C (en) * | 1998-03-06 | 2001-03-07 | 清华大学 | Current collecting composite material containing nm-carbon tube |
| CN101783565A (en) * | 2009-01-19 | 2010-07-21 | 德昌电机(深圳)有限公司 | Motor and electric brush assembly thereof |
| CN106025767A (en) * | 2015-03-31 | 2016-10-12 | 滑动环及设备制造有限公司 | Device and method for manufacturing brush blocks for slip rings |
| CN106410553A (en) * | 2016-05-27 | 2017-02-15 | 慈溪市华夏电器实业有限公司 | High-conductivity carbon brush materials and preparation method thereof |
| CN108879271A (en) * | 2018-07-02 | 2018-11-23 | 汉寿县祥顺碳制品有限公司 | A kind of wear-resistant automobile fuel pump carbon brush and preparation method thereof |
| CN109292769A (en) * | 2018-11-23 | 2019-02-01 | 湖南顶立科技有限公司 | A kind of high purity graphite powder and preparation method thereof |
| CN109326940A (en) * | 2018-10-11 | 2019-02-12 | 大同新成新材料股份有限公司 | A kind of preparation method and preparation facilities of carbon brush for electric machine |
| CN111799621A (en) * | 2020-06-28 | 2020-10-20 | 东风博泽汽车系统有限公司 | High-current-resistant motor carbon brush composite material |
| CN114835114A (en) * | 2022-04-06 | 2022-08-02 | 青海黄河上游水电开发有限责任公司新能源分公司 | Graphite component purification furnace |
-
1990
- 1990-08-11 CN CN 90106992 patent/CN1024611C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062841C (en) * | 1998-03-06 | 2001-03-07 | 清华大学 | Current collecting composite material containing nm-carbon tube |
| CN101783565A (en) * | 2009-01-19 | 2010-07-21 | 德昌电机(深圳)有限公司 | Motor and electric brush assembly thereof |
| CN101783565B (en) * | 2009-01-19 | 2013-07-24 | 德昌电机(深圳)有限公司 | Motor and electric brush assembly thereof |
| CN106025767A (en) * | 2015-03-31 | 2016-10-12 | 滑动环及设备制造有限公司 | Device and method for manufacturing brush blocks for slip rings |
| CN106410553A (en) * | 2016-05-27 | 2017-02-15 | 慈溪市华夏电器实业有限公司 | High-conductivity carbon brush materials and preparation method thereof |
| CN106410553B (en) * | 2016-05-27 | 2019-08-16 | 慈溪市华夏电器实业有限公司 | A kind of high conductivity carbon brush material and preparation method thereof |
| CN108879271A (en) * | 2018-07-02 | 2018-11-23 | 汉寿县祥顺碳制品有限公司 | A kind of wear-resistant automobile fuel pump carbon brush and preparation method thereof |
| CN109326940A (en) * | 2018-10-11 | 2019-02-12 | 大同新成新材料股份有限公司 | A kind of preparation method and preparation facilities of carbon brush for electric machine |
| CN109292769A (en) * | 2018-11-23 | 2019-02-01 | 湖南顶立科技有限公司 | A kind of high purity graphite powder and preparation method thereof |
| CN111799621A (en) * | 2020-06-28 | 2020-10-20 | 东风博泽汽车系统有限公司 | High-current-resistant motor carbon brush composite material |
| CN114835114A (en) * | 2022-04-06 | 2022-08-02 | 青海黄河上游水电开发有限责任公司新能源分公司 | Graphite component purification furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024611C (en) | 1994-05-18 |
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