CN109301649A - It is a kind of for the brush composite material of direct current micromotor and application - Google Patents
It is a kind of for the brush composite material of direct current micromotor and application Download PDFInfo
- Publication number
- CN109301649A CN109301649A CN201811074867.6A CN201811074867A CN109301649A CN 109301649 A CN109301649 A CN 109301649A CN 201811074867 A CN201811074867 A CN 201811074867A CN 109301649 A CN109301649 A CN 109301649A
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- China
- Prior art keywords
- alloy
- composite material
- brush
- noble metal
- alloy layer
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/04—Alloys based on a platinum group metal
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The present invention relates to a kind of novel brush composite material, the brush composite material is made of noble metal alloy layer and copper alloy elastic basic unit, each component mass percentage of noble metal alloy layer are as follows: Pd 29-55%；Ni 0.05-2.0%；Surplus is Ag, and the copper alloy elastic basic unit is BZn18-26 alloy or MX series alloy.Material of the present invention has good wearability and arc resistant ability, is excellent sliding contact material, is suitable for making the brush of dc motor.
Description
Technical field
The present invention relates to a kind of brush composite material, in particular to a kind of brush composite material for direct current micromotor and
Using.
Background technique
Brushing piece is one of core element of dc motor, it and commutator constitute sliding and be in electrical contact conductive couple.In work
The double action of skimming wear and arc erosion is born during making, while also by corrosive medias various in ambiance
It influences.Therefore, brushing piece material is while requiring satisfactory electrical conductivity, it is also necessary to have good wearability, arc resistant ability and resistance to
Corrosivity；Meanwhile brushing piece and commutator pairing work, performance and service life of the Proper Match of the two performance to dc motor
It has decisive impact.For a long time, with AgPd30 and AgPd50 (i.e. percentage, the Pd content difference of alloy
Make working lining for 30% and 50%) alloy, substrate is using BZn18-26 alloy or the material of MX elastic alloy (Cu-Ni-Sn series)
Expect the brushing piece of production.This brush material is on common direct current generator, since motor speed is not high, can meet use, but needle
Service life bad problem is then easy to appear to high-revolving direct current generator.
Brush material occur the main reason for the service life is bad be micro machine during operation, with commutator match process
In, the ablation and abrasion of electric arc cause micro machine premature failure occur.Chinese patent 201110335754.9 provides one kind certainly
The sliding contact material and laminar composite of lubrication, be used for micro-motor brush, by inside silver palladium alloy add rare earth and
Graphite can get lubrication, improve wearing character, improve the purpose in service life, but for high-revolving cell phone vibrating motor
Still remain the problem that arc resistant is bad and wearability is inadequate.What Chinese patent 20110092385.5 provided has high-wearing feature
Palladium-silver series contact material and 201110335649.5 provide a kind of sliding contact material and laminar composite, this is
Column patent is that the elements such as copper, zinc, rare earth are added inside silver palladium alloy, forms second-phase strength, reaches the mesh for improving wearability
's.But it is largely added and is formed the second phase Hard Inclusion due to these cheap metal elements, pairing commutator face can be damaged, one
Under fixed operating condition, commutator premature abrasion will lead to, timeliness occur so as to cause micro machine.Especially high-revolving movement
Mobile phone vibrating motor can often find to lead to occur the phenomenon that crash in advance because commutator wear is excessive.
Summary of the invention
The object of the present invention is to provide a kind of for the brush composite material of direct current micromotor and application, using the material
The brush for preparing dc motor, high revolving speed, high current smart phone vibrating motor use under conditions of have high abrasion
Property, arc resistance can be good, the advantages of long service life.
The technical scheme is that
For the brush composite material of direct current micromotor, the brush composite material is by noble metal alloy layer and copper alloy elasticity
Base is constituted, each component mass percentage of noble metal alloy layer are as follows:
Pd 29-55%；
Ni 0.05-2.0%；
Surplus is Ag.
Preferable technical solution is each component mass percentage of the noble metal alloy layer are as follows:
Pd 50-55%；
Ni 0.05-0.25%；
Surplus is Ag.
The copper alloy elastic basic unit is BZn18-26 alloy or MX series alloy.
The MX series alloy is any of Cu-Ni-Sn series of elastic alloy.
The noble metal alloy layer is embedded on copper alloy elastic basic unit, and noble metal alloy layer is working lining.
It can be used for the brush of direct current generator for the brush composite material of direct current micromotor.
The preparation process of brush composite material of the present invention for direct current micromotor are as follows:
1) noble metal alloy layer is prepared using vacuum induction melting, wherein nickel element can be added in the form of intermediate alloy palladium nickel
Enter, can also be added in the form of pure nickel.
2) by the noble metal alloy layer ingot casting of preparation after cogging, rolling, using method hot rolling technology, with copper alloy elasticity
Substrate is combined two layers of composite strip, and for save the cost, usual layer of precious metal is embedded in copper alloy bullet with the multiple form of item
On property substrate.
Advantages of the present invention are as follows:
1) since noble metal alloy layer of the present invention is by adding a small amount of nickel in silver palladium alloy, silver, palladium, nickel are formed uniformly
Single solid solution, apparent solution strengthening can be formed, wearability can be significantly improved, while alloy not will form the second phase
Particle, because being damaged without being formed to micro-motor commutator.
2) noble metal alloy layer of the present invention is by adding a small amount of nickel in silver palladium alloy, since nickel additive amount is fewer,
It will not cause the increase of contact resistance, while the addition of a small amount of nickel, the effect of dispersion electric arc, therefore micro machine can be got
When having spark generation, the arc resistant ability of material with rapid dispersion, can be improved.
3) noble metal alloy layer of the present invention can significantly improve noble metal conjunction by adding a small amount of nickel in silver palladium alloy
The recrystallization temperature of layer gold, recrystallization temperature can be improved 100 degree or so, this is more preferable with copper alloy elastic substrate matching, especially
It is MX series alloy, and since the solid solubility temperature of MX series alloy is at 800 degree or so, the brush made at these temperatures is compound
The tissue of the noble metal alloy layer of material still can guarantee uniform, tiny, can give full play to the use characteristic of this composite material.
4) the nickel amount of being added on of noble metal alloy layer of the present invention is very few (mass fraction is less than 0.05%), and it is strong can not to get solid solution
The purpose for changing and improving recrystallization, is unable to improve wearability.The nickel amount of being added on is excessive (mass fraction is greater than 2%), will lead to contact
Resistance increases, while nickel oxide powder is easy to produce in wear process, deteriorates the electrical contact performance of micro machine.Pd content is too low
(mass fraction is less than 29%), material wear ability and anti-organic contamination performance are poor, and (mass fraction is greater than Pd too high levels
55%) it, will lead to sharply increasing for production cost, application is not strong.
Specific embodiment
Examples 1 to 10 and comparative example 1~4, such as table 1.
Prepare above-described embodiment 1~10 and comparative example 1~4 the preparation method is as follows:
1) noble metal alloy layer is prepared using vacuum melting, ingredient is matched according to table 1, and nickel is with palladium nickel intermediate alloy
Form be added, the melting together with silver plate and palladium ingot.Melted alloy by forging, kicker, intermediate annealing and be drawn into band
Material or silk material；
2) by above-mentioned noble metal alloy layer by way of method hot rolling with elastic alloy working lining BZn18-26 band and
MX215 band carries out preparation.Compound band is being heat-treated repeatedly and rolling, be worked into total thickness by way of pickling
0.05mm is thick, and noble metal alloy layer is with a thickness of 0.005mm.Wherein the heat treatment temperature of BZn18-26 base is controlled at 700 DEG C,
The heat treatment temperature of MX215 is controlled at 800 DEG C.
The band is respectively used to be fabricated to micro-motor brush, by brush assembly in micro machine, corresponding commutation
The device sheet material trade mark is silver-copper-nickel-rare earth/copper.
It is tested in following test condition:
Test temperature: 25 DEG C
60% or less testing humidity:
Test voltage: 3.7V
Test electric current: 100mA
Drive manner: interrupted (open 0.5s, stop 0.5s)
Revolving speed: >=10000rpm/min
Test number of motors: 10
In test process, the working condition of motor is determined by the variation of detection motor speed and electric current, revolving speed occurs
Or electric current is exceeded or can not start when is determined as end-of-life, test result such as table 2.
Table 1:
Table 2:
| Embodiment | Test number of motors | Average life span |
| 1 | 10 | 50h |
| 2 | 10 | 55h |
| 3 | 10 | 83h |
| 4 | 10 | 120h |
| 5 | 10 | 125h |
| 6 | 10 | 54h |
| 7 | 10 | 58h |
| 8 | 10 | 95h |
| 9 | 10 | 132h |
| 10 | 10 | 155h |
| Comparative example 1 | 10 | 39h |
| Comparative example 2 | 10 | 95h |
| Comparative example 3 | 10 | 42h |
| Comparative example 4 | 10 | 103h |
Conclusion: as can be seen from Table 1 and Table 2, noble metal working lining is in the case where identical Pd content, the addition of nickel content
The hardness that material can be improved improves its wearability, while arc resistant ability can be improved, and material of the present invention is excellent
Sliding contact material, show good using effect, the service life is improved, be suitable for make dc motor electricity
Brush, especially smart phone vibration electric brush.
Claims (7)
1. a kind of brush composite material for direct current micromotor, which is characterized in that the brush composite material is by precious metal alloys
Layer and copper alloy elastic basic unit are constituted, each component mass percentage of noble metal alloy layer are as follows:
Pd 29-55%；
Ni 0.05-2.0%；
Surplus is Ag.
2. composite material according to claim 1, which is characterized in that each component quality percentage of the noble metal alloy layer
Content are as follows:
Pd 50-55%；
Ni 0.05-0.25%；
Surplus is Ag.
3. composite material according to claim 1, it is characterised in that the copper alloy elastic basic unit is BZn18-26 alloy
Or MX series alloy.
4. composite material according to claim 1, it is characterised in that the MX series alloy is Cu-Ni-Sn series of elastic
Alloy it is any.
5. composite material according to claim 1, it is characterised in that: the noble metal alloy layer is embedded in copper alloy bullet
In property base, noble metal alloy layer is working lining.
6. a kind of brush, it is characterised in that: it uses material described in claim 1.
7. a kind of dc motor, it is characterised in that: it uses brush described in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074867.6A CN109301649A (en) | 2018-09-14 | 2018-09-14 | It is a kind of for the brush composite material of direct current micromotor and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074867.6A CN109301649A (en) | 2018-09-14 | 2018-09-14 | It is a kind of for the brush composite material of direct current micromotor and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109301649A true CN109301649A (en) | 2019-02-01 |
Family
ID=65163109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811074867.6A Pending CN109301649A (en) | 2018-09-14 | 2018-09-14 | It is a kind of for the brush composite material of direct current micromotor and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109301649A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111036704A (en) * | 2019-12-06 | 2020-04-21 | 西安广源机电技术有限公司 | Production method of composite material for micro-electromechanical brush |
| JP2020063515A (en) * | 2016-01-25 | 2020-04-23 | 田中貴金属工業株式会社 | Sliding contact material and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1150861A (en) * | 1995-02-24 | 1997-05-28 | 马渊马达株式会社 | Sliding contact material, clad composite material, commutator employing said material and direct current motor employing said commutator |
| CN102505083A (en) * | 2011-10-29 | 2012-06-20 | 重庆川仪自动化股份有限公司 | Self-lubricating sliding contact material and layered composite material |
| CN104726742A (en) * | 2015-02-10 | 2015-06-24 | 上海中希合金有限公司 | Preparation method of composite strip for punching electric brush piece of direct current micromotor |
-
2018
- 2018-09-14 CN CN201811074867.6A patent/CN109301649A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1150861A (en) * | 1995-02-24 | 1997-05-28 | 马渊马达株式会社 | Sliding contact material, clad composite material, commutator employing said material and direct current motor employing said commutator |
| CN102505083A (en) * | 2011-10-29 | 2012-06-20 | 重庆川仪自动化股份有限公司 | Self-lubricating sliding contact material and layered composite material |
| CN104726742A (en) * | 2015-02-10 | 2015-06-24 | 上海中希合金有限公司 | Preparation method of composite strip for punching electric brush piece of direct current micromotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020063515A (en) * | 2016-01-25 | 2020-04-23 | 田中貴金属工業株式会社 | Sliding contact material and manufacturing method thereof |
| CN111036704A (en) * | 2019-12-06 | 2020-04-21 | 西安广源机电技术有限公司 | Production method of composite material for micro-electromechanical brush |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190201 |
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| RJ01 | Rejection of invention patent application after publication |