CN105140752A - Highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and preparation method of material - Google Patents
Highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and preparation method of material Download PDFInfo
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- CN105140752A CN105140752A CN201510354376.7A CN201510354376A CN105140752A CN 105140752 A CN105140752 A CN 105140752A CN 201510354376 A CN201510354376 A CN 201510354376A CN 105140752 A CN105140752 A CN 105140752A
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Abstract
The invention relates to a highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and a preparation method of the material, and belongs to the field of carbon brush materials. According to the carbon brush material, high-purity conductive graphite and conductive carbon black are used as a base material, so that the conductivity is high; a thermoplastic polyester elastomer, liquid rosin resin and an epoxy resin solution are used as a composite bonding agent, the bonding agent is highly compatible with the conductive base material and can be effectively bonded to the conductive base material, and the processing performance is high; the blended lithium iron phosphate micro powder and mesocarbon microbeads improve the strength and conductivity of the material; and blended magnesium silicate and yttrium oxide are conducive to the sintering effect. A carbon brush prepared by the material has the advantages that the size precision is high, the internal structure is compact, the conductive and cornering performances are high, the wear extent is low, sparks are small, operation is smooth, and the service life is effectively prolonged.
Description
Technical field
The present invention relates to carbon brush material field, be specifically related to carbon brush for electric machine material of a kind of fine and close high connductivity of height of blending LiFePO4 and preparation method thereof.
Background technology
Carbon brush is a class conduction slide contact member, be widely used in many electric equipments, it is the device of transferring energy and signal between the standing part of motor, engine or other rotating machineries and rotating part, its composition material, primarily of graphite, Resin adhesive and other auxiliary agents, is then made through sinter molding.Carbon brush in use with rotor, stator CONTACT WITH FRICTION, wearing and tearing can be produced at contact-making surface, if do not improve the abrasion resistance properties of carbon brush, serviceability and the useful life of whole equipment will be badly influenced, therefore, research and development have high abrasion resistance, the carbon brush material of high conductivity seems particularly important.
Summary of the invention
The object of the invention is to, provide carbon brush for electric machine material of the fine and close high connductivity of a kind of height of blending LiFePO4 and preparation method thereof, to achieve these goals, the technical solution used in the present invention is as follows:
A kind of carbon brush for electric machine material of the fine and close high connductivity of height of blending LiFePO4, it is characterized in that, this carbon brush material is made up of the raw material of following weight portion: LiFePO4 micro mist 2-3, MCMB 1-3, thermoplastic polyester elastomer 6-8, magnesium silicate 0.2-0.3, liquid rosin resin 5-8, concentration are the epoxy resin solution 30-40 of 45-50%, high-purity electrically conductive graphite powder 50-60, conductive titanium dioxide 5-6, absolute ethyl alcohol 6-8, conductive black 8-10, yittrium oxide 0.001-0.002, naphthenic oil 10-12, silane coupler 1-2.
The preparation method of the carbon brush for electric machine material of the fine and close high connductivity of height of described a kind of blending LiFePO4 is:
(1) first conductive titanium dioxide and absolute ethyl alcohol, thermoplastic polyester elastomer, liquid rosin resin, epoxy resin solution are uniformly mixed, make composite mortar 1 for subsequent use;
(2) by LiFePO4 micro mist, MCMB, conductive black, yittrium oxide and silane coupler, naphthenic oil mixing and stirring, composite mortar 2 is obtained for subsequent use;
(3) composite mortar 1 prepared above, composite mortar 2 are mixed with other leftover materials, drop into after mixing in mixer, be heated to 60-80 DEG C, insulation 50-60min, discharging after the 30-40min of continuation stirring subsequently, is cooled to after room temperature until material and drops into backflow pulverizing in pulverizer, gained powder crosses 100 mesh sieves, again by compressing for gained micro mist band line, the product after shaping is sent in blanket of nitrogen sintering furnace and is sintered, and gets product after terminating through cooling, electric welding, packaging.
Described sintering condition is: sintering temperature: 400-450 DEG C; Sintering time 8-10h.
Beneficial effect: the present invention utilizes high-purity electrically conductive graphite and conductive black as base-material, there is excellent conductivity, with thermoplastic polyester elastomer, liquid rosin resin and epoxy resin solution are as composite adhesive, this adhesive has good compatibility and cementability with conduction base-material, good processability, the LiFePO4 micro mist of blending, MCMB improves intensity and the conductivity of material, the magnesium silicate of blending, yittrium oxide helps effect of sintering, the carbon brush dimensional accuracy that the present invention prepares is high, internal structure compact, electric conductivity is excellent, steering behaviour is good, wear extent is low, spark is little, smooth running, useful life is effectively extended.
Embodiment
Embodiment
The carbon brush material of the present embodiment is made up of the raw material of following weight portion: LiFePO4 micro mist 2.5, MCMB 2, thermoplastic polyester elastomer 7, magnesium silicate 0.2, liquid rosin resin 6, concentration are the epoxy resin solution 35 of 50%, high-purity electrically conductive graphite powder 55, conductive titanium dioxide 5.5, absolute ethyl alcohol 7, conductive black 8, yittrium oxide 0.001, naphthenic oil 10, silane coupler 1.5.
Its preparation method is:
(1) first conductive titanium dioxide and absolute ethyl alcohol, thermoplastic polyester elastomer, liquid rosin resin, epoxy resin solution are uniformly mixed, make composite mortar 1 for subsequent use;
(2) by LiFePO4 micro mist, MCMB, conductive black, yittrium oxide and silane coupler, naphthenic oil mixing and stirring, composite mortar 2 is obtained for subsequent use;
(3) composite mortar 1 prepared above, composite mortar 2 are mixed with other leftover materials, drop into after mixing in mixer, be heated to 60-80 DEG C, insulation 55min, discharging after the 35min of continuation stirring subsequently, is cooled to after room temperature until material and drops into backflow pulverizing in pulverizer, gained powder crosses 100 mesh sieves, again by compressing for gained micro mist band line, the product after shaping is sent in blanket of nitrogen sintering furnace and is sintered, and gets product after terminating through cooling, electric welding, packaging.
Wherein sintering condition is: sintering temperature: 400 DEG C; Sintering time 10h.
The carbon brush the performance test results that the present embodiment obtains is as follows:
| Test item | Detected value |
| Size | 5mm*5mm*20mm |
| Shore hardness | 18 |
| Abrasion loss mm/100H | 0.43 |
| Slip noise (dB) | ≤45 |
| Useful life (H) | ≥1305 |
| Spark situation | Stable |
| Resistivity μ Ω .m | 405 |
Claims (3)
1. the carbon brush for electric machine material of the fine and close high connductivity of the height of a blending LiFePO4, it is characterized in that, this carbon brush material is made up of the raw material of following weight portion: LiFePO4 micro mist 2-3, MCMB 1-3, thermoplastic polyester elastomer 6-8, magnesium silicate 0.2-0.3, liquid rosin resin 5-8, concentration are the epoxy resin solution 30-40 of 45-50%, high-purity electrically conductive graphite powder 50-60, conductive titanium dioxide 5-6, absolute ethyl alcohol 6-8, conductive black 8-10, yittrium oxide 0.001-0.002, naphthenic oil 10-12, silane coupler 1-2.
2. the preparation method of the carbon brush for electric machine material of the fine and close high connductivity of the height of a kind of blending LiFePO4 as claimed in claim 1, it is characterized in that, described preparation method is:
(1) first conductive titanium dioxide and absolute ethyl alcohol, thermoplastic polyester elastomer, liquid rosin resin, epoxy resin solution are uniformly mixed, make composite mortar 1 for subsequent use;
(2) by LiFePO4 micro mist, MCMB, conductive black, yittrium oxide and silane coupler, naphthenic oil mixing and stirring, composite mortar 2 is obtained for subsequent use;
(3) composite mortar 1 prepared above, composite mortar 2 are mixed with other leftover materials, drop into after mixing in mixer, be heated to 60-80 DEG C, insulation 50-60min, discharging after the 30-40min of continuation stirring subsequently, is cooled to after room temperature until material and drops into backflow pulverizing in pulverizer, gained powder crosses 100 mesh sieves, again by compressing for gained micro mist band line, the product after shaping is sent in blanket of nitrogen sintering furnace and is sintered, and gets product after terminating through cooling, electric welding, packaging.
3. the preparation method of the carbon brush for electric machine material of the fine and close high connductivity of the height of a kind of blending LiFePO4 as claimed in claim 2, it is characterized in that, in described sintering process, sintering condition is: sintering temperature: 400-450 DEG C; Sintering time 8-10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510354376.7A CN105140752A (en) | 2015-06-25 | 2015-06-25 | Highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and preparation method of material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510354376.7A CN105140752A (en) | 2015-06-25 | 2015-06-25 | Highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and preparation method of material |
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| CN105140752A true CN105140752A (en) | 2015-12-09 |
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| CN201510354376.7A Pending CN105140752A (en) | 2015-06-25 | 2015-06-25 | Highly-compact highly-conductive motor carbon brush material blended with lithium iron phosphate and preparation method of material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505393A (en) * | 2016-10-31 | 2017-03-15 | 阜阳市鼎铭汽车配件制造有限公司 | A kind of quiet anlistatig copper-base graphite carbon brush for electric machine and preparation method thereof |
| CN106513661A (en) * | 2016-10-31 | 2017-03-22 | 阜阳市鼎铭汽车配件制造有限公司 | High-lubricity high-hardness copper-based graphite motor carbon brush and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142650A (en) * | 2010-11-30 | 2011-08-03 | 施丽萍 | Nano rare earth compound high-wear-resisting additive for electric brushes and preparation method thereof |
| CN102931560A (en) * | 2012-11-21 | 2013-02-13 | 天津市贝特瑞新能源科技有限公司 | Brush material with excellent performance, and preparation method and application thereof |
| CN103259150A (en) * | 2012-02-16 | 2013-08-21 | 苏州东南碳制品有限公司 | Electric brush for electric tool motor and preparation method thereof |
-
2015
- 2015-06-25 CN CN201510354376.7A patent/CN105140752A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142650A (en) * | 2010-11-30 | 2011-08-03 | 施丽萍 | Nano rare earth compound high-wear-resisting additive for electric brushes and preparation method thereof |
| CN103259150A (en) * | 2012-02-16 | 2013-08-21 | 苏州东南碳制品有限公司 | Electric brush for electric tool motor and preparation method thereof |
| CN102931560A (en) * | 2012-11-21 | 2013-02-13 | 天津市贝特瑞新能源科技有限公司 | Brush material with excellent performance, and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505393A (en) * | 2016-10-31 | 2017-03-15 | 阜阳市鼎铭汽车配件制造有限公司 | A kind of quiet anlistatig copper-base graphite carbon brush for electric machine and preparation method thereof |
| CN106513661A (en) * | 2016-10-31 | 2017-03-22 | 阜阳市鼎铭汽车配件制造有限公司 | High-lubricity high-hardness copper-based graphite motor carbon brush and manufacturing method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20151209 |