CN108455987B - Carbon brush for wind driven generator and manufacturing method thereof - Google Patents

Carbon brush for wind driven generator and manufacturing method thereof Download PDF

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Publication number
CN108455987B
CN108455987B CN201810289047.2A CN201810289047A CN108455987B CN 108455987 B CN108455987 B CN 108455987B CN 201810289047 A CN201810289047 A CN 201810289047A CN 108455987 B CN108455987 B CN 108455987B
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carbon brush
powder
furnace
finished
pot
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CN108455987A (en
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林献乐
刘欢
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Jiangsu Sunki Carbon Product Co ltd
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Jiangsu Sunki Carbon Product Co ltd
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C—CHEMISTRY; METALLURGY
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • H01R39/26—Solid sliding contacts, e.g. carbon brush
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/12—Manufacture of brushes
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    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40—Metallic constituents or additives not added as binding phase
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/402—Aluminium
    • C—CHEMISTRY; METALLURGY
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/407—Copper
    • C—CHEMISTRY; METALLURGY
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
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    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

The invention discloses a carbon brush for a wind driven generator, which is prepared from the following components in percentage by mass: 50-60% of graphite powder, 38-42% of electrolytic copper powder, 1-3% of zinc powder and 1-5% of aluminum powder. The carbon brush disclosed by the invention has the advantages that the surface layer of a carbon brush product is not oxidized by reasonably proportioning the powder raw materials and adopting a closed roasting process, the carbon brush has higher strength and quality, the heating phenomenon of the carbon brush in use can be effectively relieved, the generation of operating sparks is avoided, the service life of a wind driven generator is prolonged by 10-20%, the production cost is reduced, the process is simplified, and the carbon brush is free from environmental pollution and is more environment-friendly.

Description

Carbon brush for wind driven generator and manufacturing method thereof
Technical Field
The invention belongs to the technical field of carbon brush manufacturing, and particularly relates to a carbon brush for a wind driven generator and a manufacturing method thereof.
Background
Copper powder and graphite powder are used as raw materials of a carbon brush used by a wind driven generator at present and are roasted and molded, ash-containing gas generated in the roasting process of a roasting furnace is directly discharged into the atmosphere, so that the surrounding environment is polluted, the surface layer of the product is easy to oxidize, an oxide layer needs to be ground after roasting, the working procedure and labor intensity are increased, the intensity and quality of the carbon brush product are difficult to further improve, the phenomenon of heating or sparking is easy to occur during the operation of the wind driven generator, frequent maintenance is needed, and the operation cost of the wind driven generator is higher.
Disclosure of Invention
The invention aims to provide a carbon brush for a wind driven generator and a manufacturing method thereof, so as to improve the strength and the quality of the carbon brush and prolong the service life of the wind driven generator.
In order to solve the technical problems, the invention adopts the technical scheme that:
a carbon brush for a wind driven generator is prepared from the following components in percentage by mass: 50-60% of graphite powder, 38-42% of electrolytic copper powder, 1-3% of zinc powder and 1-5% of aluminum powder.
Furthermore, the particle sizes of the graphite powder, the electrolytic copper powder, the zinc powder and the aluminum powder are not more than 300 meshes.
Further, the manufacturing method of the carbon brush for the wind driven generator comprises the following steps:
(1) weighing graphite powder, electrolytic copper powder, zinc powder and aluminum powder according to the formula;
(2) putting the weighed raw materials into a mixing tank in sequence, and stirring and mixing uniformly at normal temperature to obtain a mixture;
(3) cold-pressing the mixture at normal temperature by using a 100-ton cold press to obtain a primary semi-finished product;
(4) stacking the primary semi-finished product in a closed roasting furnace for high-temperature and high-pressure roasting at the temperature of 850 ℃ and 950 ℃ for 16-20h to obtain a secondary semi-finished product;
(5) polishing, perforating and processing the secondary semi-finished product to obtain a finished carbon brush product;
(6) and (5) inspecting the finished carbon brush, and packaging and warehousing after the finished carbon brush is qualified.
Further, above-mentioned closed roaster furnace includes the pit furnace, the top of pit furnace is equipped with the bell, the bell intussuseption is filled with the heat preservation cotton, be equipped with outer pot in the pit furnace, be equipped with a plurality of insulating bricks between the bottom of outer pot and the pit furnace, be equipped with the heating wire between the lateral wall of outer pot and the inside wall of pit furnace, it has two interior pots that are used for stacking once semi-manufactured to go up to have in this outer pot, the gravel and sand is filled to the surplus space, it is sealed through the sealing washer between the pot cover of interior pot and the pot body, keep apart through the graphite flake between once semi-manufactured and the interior pot, activated carbon has been laid at graphite flake and once.
Furthermore, the sealing ring is an asbestos sealing ring or a carbon fiber sealing ring.
Furthermore, the paving thickness of the activated carbon is 18-22 mm.
The invention has the advantages that: the carbon brush disclosed by the invention has the advantages that the surface layer of a carbon brush product is not oxidized by reasonably proportioning the powder raw materials and adopting a closed roasting process, the carbon brush has higher strength and quality, the heating phenomenon of the carbon brush in use can be effectively relieved, the generation of operating sparks is avoided, the service life of a wind driven generator is prolonged by 10-20%, the production cost is reduced, the process is simplified, and the carbon brush is free from environmental pollution and is more environment-friendly.
Drawings
The invention is described in further detail below with reference to the figures and the detailed description.
FIG. 1 is a schematic structural view of a closed type roaster according to the present invention;
fig. 2 is a schematic structural view of the inner pot in the invention.
The device comprises a pit furnace 1, a pit furnace 2, an electric heating wire 3, a furnace cover 4, heat preservation cotton 5, an outer pot 6, gravel 7, heat preservation bricks 8, an inner pot 9, a sealing ring 10, activated carbon 11, graphite flakes 12 and a primary semi-finished product.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.
Example 1
A carbon brush for a wind driven generator is prepared from the following components in percentage by mass: 50% of graphite powder, 42% of electrolytic copper powder, 3% of zinc powder and 5% of aluminum powder, wherein the particle sizes of the graphite powder, the electrolytic copper powder, the zinc powder and the aluminum powder are not more than 300 meshes.
The manufacturing method of the carbon brush for the wind driven generator comprises the following steps:
(1) weighing graphite powder, electrolytic copper powder, zinc powder and aluminum powder according to the formula;
(2) putting the weighed raw materials into a mixing tank in sequence, and stirring and mixing uniformly at normal temperature to obtain a mixture;
(3) cold-pressing the mixture at normal temperature by using a 100-ton cold press to obtain a primary semi-finished product;
(4) stacking the primary semi-finished product in a closed roasting furnace for high-temperature and high-pressure roasting at 850 ℃ for 18 hours to obtain a secondary semi-finished product;
(5) polishing, perforating and processing the secondary semi-finished product to obtain a finished carbon brush product;
(6) inspecting the carbon brush finished product with the strength of 2200N/m2Resistivity of 1.5. mu. omega. m, density of 3.25g/cm3And then packaging and warehousing.
Example 2
A carbon brush for a wind driven generator is prepared from the following components in percentage by mass: 55% of graphite powder, 40% of electrolytic copper powder, 2% of zinc powder and 3% of aluminum powder, wherein the particle sizes of the graphite powder, the electrolytic copper powder, the zinc powder and the aluminum powder are not more than 300 meshes.
The manufacturing method of the carbon brush for the wind driven generator comprises the following steps:
(1) weighing graphite powder, electrolytic copper powder, zinc powder and aluminum powder according to the formula;
(2) putting the weighed raw materials into a mixing tank in sequence, and stirring and mixing uniformly at normal temperature to obtain a mixture;
(3) cold-pressing the mixture at normal temperature by using a 100-ton cold press to obtain a primary semi-finished product;
(4) stacking the primary semi-finished product in a closed roasting furnace for high-temperature and high-pressure roasting at 900 ℃ for 18 hours to obtain a secondary semi-finished product;
(5) polishing, perforating and processing the secondary semi-finished product to obtain a finished carbon brush product;
(6) the carbon brush finished product is inspected, and the strength is 2000N/m2Resistivity of 1.55. mu. omega. m and density of 3.2g/cm3And then packaging and warehousing.
Example 3
A carbon brush for a wind driven generator is prepared from the following components in percentage by mass: 60% of graphite powder, 38% of electrolytic copper powder, 1% of zinc powder and 1% of aluminum powder, wherein the particle sizes of the graphite powder, the electrolytic copper powder, the zinc powder and the aluminum powder are not more than 300 meshes.
The manufacturing method of the carbon brush for the wind driven generator comprises the following steps:
(1) weighing graphite powder, electrolytic copper powder, zinc powder and aluminum powder according to the formula;
(2) putting the weighed raw materials into a mixing tank in sequence, and stirring and mixing uniformly at normal temperature to obtain a mixture;
(3) cold-pressing the mixture at normal temperature by using a 100-ton cold press to obtain a primary semi-finished product;
(4) stacking the primary semi-finished product in a closed roasting furnace for high-temperature and high-pressure roasting at 950 ℃ for 20 hours to obtain a secondary semi-finished product;
(5) polishing, perforating and processing the secondary semi-finished product to obtain a finished carbon brush product;
(6) the carbon brush finished product is tested, and the strength is 1800N/m2Resistivity of 1.6. mu. omega. m and density of 3.1g/cm3And then packaging and warehousing.
As shown in fig. 1 and 2, the closed roasting furnace in each of the above embodiments includes a pit furnace 1, a furnace cover 3 is disposed on the top of the pit furnace 1, heat insulation cotton 4 is filled in the furnace cover 3, an outer pot 5 is disposed in the pit furnace 1, a plurality of heat insulation bricks 7 are disposed between the bottom of the outer pot 5 and the pit furnace 1, heating wires 2 are disposed between the outer side wall of the outer pot 5 and the inner side wall of the pit furnace 1, two inner pots 8 for stacking primary semi-finished products 12 are disposed in the outer pot 5 up and down, a remaining space is filled with sandstone 6, the pot cover and the pot body of the inner pot 8 are sealed by a sealing ring 9, the primary semi-finished products 12 are separated from the inner pot 8 by graphite sheets 11, and activated carbon 10 with a thickness of 18-22mm is spread on the tops of the graphite sheets 11 and.
Before roasting, the primary semi-finished product 12 is respectively stacked in two inner pots 8, a graphite sheet 11 is placed between the primary semi-finished product 12 and the inner pots 8, activated carbon 10 is laid on the tops of the graphite sheet 11 and the primary semi-finished product 12, then a pot cover of the inner pot 8 is hermetically connected with a pot body through an asbestos sealing ring or a carbon fiber sealing ring, then gravel 6 with proper thickness is laid on the inner bottom of the outer pot 5 and hung into one of the inner pots 8, the gravel 6 with proper thickness is continuously laid and then hung into the other inner pot 8, the gravel 6 is laid on the top of the outer pot 5, and finally the furnace cover 3 is covered.
During the calcination, heat to required temperature through heating wire 2, once half-finished product 12 roasts in interior pot 8, and sealing washer 9 can effectively prevent calcination process gas leakage, and the active carbon of laying simultaneously can effectively adsorb the ash-containing gas that the calcination produced, and then prevents that the carbon brush top layer from producing the oxidation, avoids the destruction of carbon brush structure, promotes the quality of carbon brush product.
And after roasting is finished, naturally cooling the closed roasting furnace to below 300 ℃, hanging the closed roasting furnace out of the outer pot 5, removing the sand 6 when the overall temperature of the outer pot 5 is reduced to below 80 ℃, hanging the two inner pots 8 in sequence, taking out a secondary semi-finished product obtained by the roasting process, and performing subsequent processes to obtain the carbon brush product for the wind driven generator. The activated carbon 10 is not reused after being used once to ensure its adsorption efficiency on ash-containing gas.

Claims (3)

1. The carbon brush for the wind driven generator is characterized by being prepared from the following components in percentage by mass: 50 portions of graphite powder
60 percent of electrolytic copper powder, 38 to 42 percent of electrolytic copper powder, 1 to 3 percent of zinc powder and 1 to 5 percent of aluminum powder;
the manufacturing method of the carbon brush for the wind driven generator comprises the following steps:
(1) weighing graphite powder, electrolytic copper powder, zinc powder and aluminum powder according to the formula;
(2) putting the weighed raw materials into a mixing tank in sequence, and stirring and mixing uniformly at normal temperature to obtain a mixture;
(3) cold-pressing the mixture at normal temperature by using a 100-ton cold press to obtain a primary semi-finished product;
(4) stacking the primary semi-finished product in a closed roasting furnace for high-temperature and high-pressure roasting at the temperature of 850-
The temperature is 16-20h, and a secondary semi-finished product is obtained;
(5) polishing, perforating and processing the secondary semi-finished product to obtain a finished carbon brush product;
(6) inspecting finished carbon brush products, packaging and warehousing after the finished carbon brush products are qualified;
the closed roasting furnace comprises a pit furnace, a furnace cover is arranged at the top of the pit furnace, heat insulation cotton is filled in the furnace cover, an outer pot is arranged in the pit furnace, a plurality of heat insulation bricks are arranged between the bottom of the outer pot and the pit furnace, heating wires are arranged between the outer side wall of the outer pot and the inner side wall of the pit furnace, two inner pots used for stacking primary semi-finished products are arranged above and below the inner part of the outer pot, the remaining space is filled with sandstone, the pot cover and the pot body of the inner pot are sealed through a sealing ring, the primary semi-finished products are isolated from the inner pot through graphite sheets, and activated carbon is paved on the tops of the graphite sheets and the primary semi-finished products; the laying thickness of the activated carbon is 18-22 mm.
2. The carbon brush for a wind power generator according to claim 1, wherein the particle size of the graphite powder, the electrolytic copper powder, the zinc powder, and the aluminum powder is not more than 300 mesh.
3. The method of manufacturing according to claim 1, wherein the seal ring is an asbestos seal ring or a carbon fiber seal ring.
CN201810289047.2A 2018-04-03 2018-04-03 Carbon brush for wind driven generator and manufacturing method thereof Active CN108455987B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2389358B (en) * 2002-06-06 2007-01-17 Totankako Co Ltd Carbon brush
CN106159623B (en) * 2014-12-31 2018-10-09 上海摩腾碳制品有限公司 A kind of wind-driven generator Special carbon brush 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
CN206146193U (en) * 2016-10-09 2017-05-03 宁夏龙江化工科技有限公司 Thermostatic oven for chemical industry

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