CN103447532A - Electric brush-slip ring system made from graphite-molybdenum disulfide-copper composite material - Google Patents
Electric brush-slip ring system made from graphite-molybdenum disulfide-copper composite material Download PDFInfo
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- CN103447532A CN103447532A CN2013104071463A CN201310407146A CN103447532A CN 103447532 A CN103447532 A CN 103447532A CN 2013104071463 A CN2013104071463 A CN 2013104071463A CN 201310407146 A CN201310407146 A CN 201310407146A CN 103447532 A CN103447532 A CN 103447532A
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Abstract
The invention discloses an electric brush-slip ring system made from graphite-molybdenum disulfide-copper composite material. The system comprises a Cu-5Pb-5Zn-5Sn slip ring and a graphite-molybdenum disulfide-copper composite electric brush. The electric brush-slip ring system is long in service life and low in cost, and is high in stability and low in energy consumption in the using process, thus being widely applied to the fields such as civil precision electronics, electrical equipment and the like.
Description
Technical field
The present invention relates to a kind of graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush-slip ring system, belong to the brush technical field.
Background technology
Brush-slip ring system is exclusively used in the super high-end fields such as Aeronautics and Astronautics originally, and along with scientific and technological development, generally for civilian precise electronic, electrical equipment.And be used in the Silver Matrix Brush Materials that uses-silver-base alloy slip ring system because high cost is limited to its application in Aeronautics and Astronautics.
The copper radical self-lubricating composite material concurrent matrix copper that contains kollag and the characteristic of kollag, i.e. good electrical and thermal conductivity performance and excellent friction and wear behavior, and be widely used in industrial circle, as electricity Shua ﹑ contact Hua Ban ﹑ bearing etc.Fine copper has good electrical and thermal conductivity performance, but its mechanical property is relative with abrasion resistance properties poor.
Summary of the invention
The present invention is directed to brush-slip ring system of the prior art is limited in the application in the fields such as civilian precise electronic, electrical equipment because use cost is high, and traditional copper-base graphite brush exists wear rate larger, unstable, and the defect that energy consumption is large, purpose is to be to provide a kind of long service life, graphite-molybdenum bisuphide that cost is low-carbon/carbon-copper composite material brush-slip ring system, this brush lubricating system when stability is high in use energy loss low.
The invention provides a kind of graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush-slip ring system, this brush-slip ring system consists of Cu-5Pb-5Zn-5Sn slip ring and graphite-molybdenum bisuphide-copper composite brush; Described graphite-molybdenum bisuphide-copper composite brush is made by the compacting sintering technique in powder metallurgy by following mass percent component: Cu-Sn alloyed powder 82%～94%, graphite powder 3%～9%, MoS
2powder 3%～9%.
In described Cu-Sn alloyed powder, the mass content of tin is 10%.
Described Cu-Sn alloyed powder granularity<38 μ m.
Described graphite powder granularity is 1～3 μ m.
Described MoS
2powder Particle Size is 1～3 μ m.
Described Cu-5Pb-5Zn-5Sn Brinell hardness is 145HB.
Described compacting sintering technique is to take hydrogen as protection gas, under the condition that is 100～150MPa at pressing pressure, by 880 ℃～910 ℃ high temperature sintering 20～90min; Or to take argon gas or nitrogen be protection gas, goal pressure is 20～25MPa, in 880 ℃～910 ℃ high temperature downforce assisted sinterings, persistent pressure in sintering process.
Graphite-molybdenum bisuphide of the present invention-carbon/carbon-copper composite material brush-slip ring system preparation method is as follows:
1) preparation of copper alloy slip ring material: copper, lead, zinc and tin metal raw material, through melting, casting, rolling, heat treatment, obtain the Cu-5Pb-5Zn-5Sn slip ring;
2) preparation of graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush:
A, sieve, drying: the Cu-Sn alloyed powder is sieved, and sieve is got the powder of granularity<38 μ m, and then dry 20～28h under 50～70 ℃, encapsulate stand-by; The molybdenum disulphide powder that the graphite powder that is 1～3 μ m by particle size range and particle size range are 1～3 μ m is dry 20～28h under 50～70 ℃, encapsulates respectively stand-by;
B, batch mixing: proportionally take step a and sieve and dried Cu-Sn alloyed powder and graphite powder and MoS
2powder, adopt the cylinder type batch mixer under the rotating speed of 200～300r/min, composite powder to be mixed, and incorporation time 6～10h, take out powder stand-by by sealing;
C, compacting: by the compound of step b gained pack in punching block under 100～150MPa pressure, carry out pre-stamped;
D, sintering: the complete sample of step c precompressed is packed in sintering furnace under hydrogen shield, at 880 ℃～910 ℃ insulation 20～90min; After sintering completes, material is cooling with stove, obtains graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush;
E or above-mentioned steps c, d are replaced by pressure assisted sintering method, by the compound of the step b gained graphite jig of packing into, under argon gas or nitrogen protection, adopt the pressure assisted sintering, 880 ℃～910 ℃ of temperature, goal pressure 20～25MPa, persistent pressure in sintering process; After sintering completes, material is cooling with stove, obtains graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush.
Beneficial effect of the present invention: the present invention is first using graphite powder with molybdenum bisuphide is composite as kollag, by the effective Dispersion Fusion of compacting sintering technique in powder metallurgy, has obtained graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush in the Cu-Sn alloy substrate, this brush in composite material coordinates the Cu-5Pb-5Zn-5Sn slip ring to form long service life, brush that cost is low-slip ring system, and in this brush-slip ring system use procedure, stability is high, energy loss is low.The present invention is through research repeatedly, cheap graphite dopping molybdenum bisuphide is carried out compositely as kollag, using, be intended to effectively reduce the cost of composite brush, and copper-base graphite material of the prior art exists wear rate larger, unstable, and the defect that energy consumption is large, but the present invention is unexpected, find, as graphite powder content and MoS
2when powder content is suitable, when particularly both optimal proportions in whole brush material are 3%～9%:3%～9%, its greasy property is more superior when using two kinds of lubriation materials separately, shows lower coefficient of friction relatively; By the compacting sintering technique in powder metallurgy, composite lubricated material is merged well and makes brush (as shown in Figure 1 in signal bronze on this Research foundation, the composite brush material does not have obvious hole, lubriation material and matrix merge perfect), the coordinative role between each material is fully embodied; Not only improved the density of brush material and hardness (relative density>99%, hardness (HB)>55), and the current-carrying better performances of brush material, contact resistance little (resistivity<0.1 μ Ω m); And lower coefficient of friction and contact resistance are conducive to improve the job stability of brush material and can effectively reduce specific energy loss.Particularly graphite powder and MoS
2powder be take mass percent ratio 3～9%:3～9% and is merged the composite brush made in the Cu-Sn10 alloyed powder be 82%～94% in mass percent by compacting sintering technique, trade-off effect between each material is the most obvious, being used in conjunction with of this brush and Cu-5Pb-5Zn-5Sn alloy slip ring, can under high speed, middle high-load condition, work, superiority is outstanding: mechanical oscillation are little, brush-slip ring system is at load 5N, sliding speed 2.1m/s, current density 6.7A/cm
2under condition, brush material Volume erosion rate<5 * 10
-15m
3/nm, coefficient of friction 0.17～0.25, dynamic contact resistance<20m Ω, when the slip ring diameter is 40mm, is greater than 800,000 service life and turns.
The accompanying drawing explanation
[Fig. 1] is the microstructure figure of graphite-molybdenum bisuphide of the present invention-carbon/carbon-copper composite material brush: show in figure that graphite and molybdenum bisuphide kollag are uniformly distributed and merge fully in the copper tin matrix, the composite brush material does not have obvious hole.
The specific embodiment
Following examples are intended to further illustrate the present invention, rather than the restriction the scope of protection of the invention.
Embodiment 1
By-400 order Cu-Sn10 powder of mass fraction 91%, the graphite powder of mass fraction 3% and the MoS of mass fraction 6%
2powder evenly mixes, and then according to powder metallurgy pressing-sintering process, prepares graphite, molybdenum bisuphide Silver Matrix Brush Materials, pressing pressure 100～150MPa, and 880 ℃～910 ℃ of sintering temperatures, temperature retention time 60min, protective atmosphere is hydrogen.The brush material relative density 99.4% that adopts above-mentioned composition and engineering to make, hardness (HB) is 60.6, resistivity<0.1 μ Ω m; While matching with the Cu-5Pb-5Zn-5Sn slip ring, at load 5N, sliding speed 2.1m/s, current density 6.7A/cm
2under condition, brush material wear rate 4.51 * 10
-15m
3/ Nm, coefficient of friction 0.241, dynamic contact resistance 18m Ω, when the slip ring diameter is 40mm, is greater than 800,000 service life and turns.
Embodiment 2
By-400 order Cu-Sn10 powder of mass fraction 88%, the graphite powder of mass fraction 6% and the MoS of mass fraction 6%
2powder evenly mixes, and then according to powder metallurgy pressing-sintering process, prepares graphite, molybdenum bisuphide Silver Matrix Brush Materials, pressing pressure 100～150MPa, and 880 ℃～910 ℃ of sintering temperatures, temperature retention time 70min, protective atmosphere is hydrogen.The brush material relative density 99.1% that adopts above-mentioned composition and engineering to make, hardness (HB) is 55.9, resistivity<0.1 μ Ω m; While matching with the Cu-5Pb-5Zn-5Sn slip ring, at load 5N, sliding speed 2.1m/s, current density 6.7A/cm
2under condition, brush material wear rate 3.96 * 10
-15m
3/ Nm, coefficient of friction 0.229, dynamic contact resistance 19m Ω, when the slip ring diameter is 40mm, is greater than 800,000 service life and turns.
Embodiment 3
By-400 order Cu-Sn10 powder of mass fraction 94%, the graphite powder of mass fraction 3% and the MoS of mass fraction 3%
2powder evenly mixes, then according to the standby graphite of powder metallurgy pressing-pressure assisted sintering legal system, molybdenum bisuphide Silver Matrix Brush Materials, and 880 ℃～910 ℃ of target temperatures, goal pressure 23MPa, persistent pressure in sintering process, protective atmosphere is argon gas or nitrogen.The brush material relative density 99.3% that adopts above-mentioned composition and engineering to make, hardness (HB) is 56.1, resistivity<0.1 μ Ω m; While matching with the Cu-5Pb-5Zn-5Sn slip ring, at load 5N, sliding speed 2.1m/s, current density 6.7A/cm
2under condition, brush material wear rate 4.78 * 10
-15m
3/ Nm, coefficient of friction 0.226, dynamic contact resistance 10m Ω, when the slip ring diameter is 40mm, is greater than 800,000 service life and turns.
Embodiment 4
By-400 order Cu-Sn10 powder of mass fraction 91%, the graphite powder of mass fraction 3% and the MoS of mass fraction 6%
2powder evenly mixes, then according to the standby graphite of powder metallurgy pressing-pressure assisted sintering legal system, molybdenum bisuphide Silver Matrix Brush Materials, and 880 ℃～910 ℃ of target temperatures, goal pressure 23MPa, persistent pressure in sintering process, protective atmosphere is argon gas or nitrogen.The brush material relative density 99.5% that adopts above-mentioned composition and engineering to make, hardness (HB) is 62.7, resistivity<0.1 μ Ω m; While matching with the Cu-5Pb-5Zn-5Sn slip ring, at load 5N, sliding speed 2.1m/s, current density 6.7A/cm
2under condition, brush material wear rate 3.52 * 10
-15m
3/ Nm, coefficient of friction 0.208, dynamic contact resistance 16m Ω, when the slip ring diameter is 40mm, is greater than 800,000 service life and turns.
Claims (4)
1. graphite-molybdenum bisuphide-carbon/carbon-copper composite material brush-slip ring system, is characterized in that, Cu-5Pb-5Zn-5Sn slip ring and graphite-molybdenum bisuphide-copper composite brush, consists of; Described graphite-molybdenum bisuphide-copper composite brush is made by the compacting sintering technique in powder metallurgy by following mass percent component: Cu-Sn alloyed powder 82%～94%, graphite powder 3%～9%, MoS
2powder 3%～9%.
2. graphite-molybdenum bisuphide as claimed in claim 1-carbon/carbon-copper composite material brush-slip ring system, is characterized in that, in described Cu-Sn alloyed powder, the mass content of tin is 10%.
3. graphite-molybdenum bisuphide as claimed in claim 1-carbon/carbon-copper composite material brush-slip ring system, is characterized in that, described Cu-Sn alloyed powder granularity<38 μ m; Described graphite powder granularity is 1～3 μ m; Described MoS
2powder Particle Size is 1～3 μ m.
4. graphite-molybdenum bisuphide as described as claim 1～3 any one-carbon/carbon-copper composite material brush-slip ring system, it is characterized in that, described compacting sintering technique is to take hydrogen as protection gas, under the condition that is 100～150MPa at pressing pressure, by 880 ℃～910 ℃ high temperature sintering 20～90min; Or to take argon gas or nitrogen be protection gas, goal pressure is 20～25MPa, at 880 ℃～910 ℃ high temperature downforce assisted sinterings.
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| CN2013104071463A CN103447532A (en) | 2013-09-09 | 2013-09-09 | Electric brush-slip ring system made from graphite-molybdenum disulfide-copper composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360243A (en) * | 2020-04-24 | 2020-07-03 | 长沙迈特锐新材料有限公司 | High-performance self-lubricating copper-based pantograph slide plate material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360243A (en) * | 2020-04-24 | 2020-07-03 | 长沙迈特锐新材料有限公司 | High-performance self-lubricating copper-based pantograph slide plate material and preparation method thereof |
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Application publication date: 20131218 |