CN113224606B - Carbon brush for electric seat motor - Google Patents
Carbon brush for electric seat motor Download PDFInfo
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- CN113224606B CN113224606B CN202110446175.5A CN202110446175A CN113224606B CN 113224606 B CN113224606 B CN 113224606B CN 202110446175 A CN202110446175 A CN 202110446175A CN 113224606 B CN113224606 B CN 113224606B
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- 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
- H01R39/22—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof incorporating lubricating or polishing ingredient
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/26—Connectors or connections adapted for particular applications for vehicles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention discloses a carbon brush for an electric seat motor, which comprises raw material copper powder, colloid powder and zinc borate, wherein the colloid powder consists of graphite powder, molybdenum disulfide and liquid resin. The carbon brush is particularly suitable for a low-voltage direct-current brushed electric seat motor, and the carbon brush has the advantages of high open porosity, low noise and good use comfort; the wear resistance is high, the hardness is high, and the service life of the carbon brush is long; the product has good stability and is an electric brush for an energy-saving direct current motor.
Description
Technical Field
The invention relates to an electric brush for a motor, in particular to a low-voltage carbon brush for a multi-direction adjusting motor, belongs to the field of motors, and is widely applied to a carbon brush for a passenger car electric seat motor.
Background
With the increasing popularity of automobiles, especially household automobiles, the comfort requirements of consumers for automobiles are higher and higher, and especially, the noise in automobiles is expected to be smaller and better.
The lifting, the back-and-forth movement and the angle adjustment of the electric seat of the automobile are all driven by a motor, the seat motor (comprising a lifting motor, a horizontal motor, an angle adjustment motor and the like) is arranged below the seat in the automobile, the electric seat motor is generally a low-voltage (generally about 12V) direct current brush motor, the motor occupies most proportion of the grinding of the carbon brush and the commutator in a noise system, and the requirement on the noise is very high because the seat motor is close to a user.
The invention patent 201510256135.9 discloses a carbon brush for a seat motor, which comprises a high conductive layer and a high lubricating layer, and is prepared by the following method, mixing electrolytic copper powder, natural graphite and phenolic resin powder uniformly to prepare a high conductive layer mixture; uniformly mixing electrolytic copper powder, natural graphite and a lubricant containing urotropine to prepare a high-lubrication-layer mixture; respectively adding the high-lubrication layer mixture and the high-conductive layer mixture into the die, and performing compression treatment on the high-lubrication layer mixture and the high-conductive layer mixture to obtain a carbon brush green compact; sintering the carbon brush pressed compact to obtain a carbon brush primary product; and grinding the primary electric brush product to obtain a finished electric brush product. The carbon brush for the seat motor is compounded by adopting the high conducting layer and the high lubricating layer, and is pressed into a special shape, namely, one surface close to the commutator is a curved cambered surface, so that the front end of the high lubricating layer is protruded to be contacted with the commutator, and the purposes of friction resistance and low noise are achieved.
The noise of the seat motor of the existing middle-high end automobile is less than or equal to 35db previously, and the noise of domestic co-operating products is about 40db generally, so that the carbon brush can only use products of foreign enterprises for the middle-high end automobile.
Disclosure of Invention
The invention aims to solve the technical problems of the carbon brush for the electric seat motor of the existing passenger vehicle, and provides the carbon brush for the electric seat motor, the opening porosity of the carbon brush for the electric seat motor is high, the noise is low in the using process after the carbon brush is installed in the seat motor, and a user feels comfortable in use; and the carbon brush has good wear resistance and prolonged service life.
In order to achieve the purpose of the invention, the invention provides a carbon brush for an electric seat motor, which comprises raw material copper powder, colloid powder and zinc borate, wherein the colloid powder consists of graphite powder, molybdenum disulfide and liquid resin.
Wherein the copper powder is electrolytic copper powder, and the copper content of the electrolytic copper powder is more than 99.5 percent, namely more than or equal to 99.5 percent; the granularity of the electrolytic copper powder is less than or equal to 1 percent than that of 200 meshes; 325 meshes of more than or equal to 90 percent; the apparent specific density of the electrolytic copper powder is less than or equal to 1.0g/cm 3 Preferably 0.7 to 1.0g/cm 3 。
In particular, the zinc borate is in the form of an amorphous powder.
Particularly, the carbon content of the graphite powder is more than 98 percent, namely more than or equal to 98 percent; the granularity requirement is as follows: +100 mesh: less than 0.05 percent; -200 mesh: more than or equal to 95 percent; 325 mesh: 80 to 90 percent; the content of the molybdenum disulfide is more than 98.5 percent, namely more than or equal to 98.5 percent; the granularity of the molybdenum disulfide is D501-3 mu m; d98 < 10 μm.
In particular, the liquid resin is selected from phenolic resin or urea-formaldehyde resin with the solid content of 45-55%, and is preferably phenolic resin.
In particular, the liquid resin is selected to be a phenolic resin with a solid content of 50%.
Wherein the weight ratio of the copper powder to the mixed material of the colloid powder and the zinc borate is 35: 65.
in particular, the proportion of the zinc borate in parts by weight in the total weight of the raw materials of the carbon brush is less than 5%, preferably 2 to 3%.
Particularly, the weight ratio of the colloid powder to the zinc borate is (60-65): (0-5), preferably (62-63): (2-3).
Particularly, the weight ratio of the copper powder, the colloid powder and the zinc borate is 35: (60-65): (0-5), preferably 35: (62-63): (2-3).
The colloid powder comprises the following raw materials in parts by weight: (90-98): (2-10): (25-35), preferably 95:5: 30.
In particular, the colloid powder is prepared according to the following method:
1) preparing the following raw materials in parts by weight
90-98 parts of graphite powder
2-10 parts of molybdenum disulfide
Liquid resin 25-35
2) Adding liquid phenolic resin into an acetone solvent, uniformly stirring, and fully dissolving the phenolic resin into acetone to prepare a phenolic resin-acetone solution;
3) Adding graphite powder and molybdenum disulfide into a mixing pot, and uniformly mixing to prepare mixed dry powder; and then adding a phenolic resin-acetone solution, uniformly mixing, and sequentially performing drying treatment, crushing treatment and screening treatment to obtain the colloidal powder.
Wherein the raw materials in the step 1) are prepared from the following raw materials in parts by weight:
graphite powder 95
Molybdenum disulfide 5
Liquid resin 30
In particular, the ratio of the amount (weight) of the acetone solvent to the total weight of the graphite powder and the molybdenum disulfide in the step 2) is (15-25):100, preferably 20: 100; the stirring rate was 25-35 rpm.
Particularly, the temperature of the drying treatment in the step 3) is 50-55 ℃; the drying time is 10-12 h; the granularity of the colloid powder is less than or equal to 45 meshes.
In particular, in the step 3), the materials are mixed under the stirring state, and the stirring speed is 14-15 rpm. And the screening treatment is to screen the crushed materials through a 45-mesh sieve.
Particularly, the materials are mixed by adopting a stirring blade intersected mixing pot under the stirring state, and the rotating speed of the stirring blade is 14-15 rpm.
Particularly, the phenolic resin-acetone solution is added after graphite powder and molybdenum disulfide are mixed for 0.5 to 1 hour.
The invention also provides a carbon brush for the electric seat motor, which is prepared by the following method:
A) Preparing materials according to the following weight parts:
copper powder 35
Colloid powder 60-65
0 to 5 portions of zinc borate
B) Uniformly mixing copper powder, colloid powder and zinc borate in proportion to prepare pressed powder; then, placing the pressed powder in a mold, performing compression molding treatment by using a press, and pressing the pressed powder into a carbon brush primary blank;
C) and (3) placing the pressed carbon brush primary blank in a high-temperature sintering furnace, and sintering under the protection of nitrogen and hydrogen to obtain the carbon brush primary blank.
Wherein the raw materials in the step A) are prepared from the following raw materials in parts by weight:
copper powder 35
62-63 of colloidal powder
2-3 parts of zinc borate
In particular, the colloidal powder in step a) is prepared according to the following method:
A1) preparing the following raw materials in parts by weight
90-98 parts of graphite powder
2-10 parts of molybdenum disulfide
Liquid resin 25-35
A2) Adding liquid phenolic resin into an acetone solvent, uniformly stirring, and fully dissolving the phenolic resin into acetone to prepare a phenolic resin-acetone solution;
A3) adding graphite powder and molybdenum disulfide into a mixing pot, and uniformly mixing to prepare mixed dry powder; and then adding a phenolic resin-acetone solution, uniformly mixing, and sequentially performing drying treatment, crushing treatment and screening treatment to obtain the colloidal powder.
Wherein the raw materials in the step A1) comprise the following components in parts by weight:
graphite powder 95
Molybdenum disulfide 5
Liquid resin 30
In particular, the acetone solvent of the acetone solvent in step a2) is used in a ratio (15-25) to 100, preferably 20:100, by weight, based on the total weight of graphite and molybdenum disulphide; the stirring rate was 25-35 rpm.
In particular, the temperature of the drying treatment in the step A3) is 50-55 ℃; the drying time is 10-12 h; the granularity of the colloid powder is less than or equal to 45 meshes.
In particular, in step A3), the materials are mixed under stirring at a rate of 14 to 15 rpm. And the screening treatment is to screen the crushed materials through a 45-mesh sieve.
Particularly, the materials are mixed by adopting a stirring blade intersected mixing pot under the stirring state, and the rotating speed of the stirring blade is 14-15 rpm.
Particularly, graphite powder and molybdenum disulfide are mixed for 0.5 to 1 hour, and then the phenolic resin-acetone solution is added.
Wherein the pressure in the process of the compression molding treatment in the step B) is 3-4t/cm 2 Preferably 3.5t/cm 2 (ii) a The press-molding treatment time is 0.5 to 1.5s, preferably 1 s.
In particular, the process of preparing the pressed powder adopts a stirring mode for mixing, and the stirring speed is 7-8 rpm. The stirring time is 0.5-1.5h, preferably 1 h.
In particular, a V-shaped mixing pot is adopted for mixing in the process of preparing the pressed powder, and the stirring speed is 7-8 rpm.
Wherein, the volume ratio of the hydrogen to the nitrogen in the step C) is (70-80) to (20-30), preferably 75: 25; the temperature in the high-temperature sintering furnace is controlled to be raised to 500-600 ℃ within 8-10h in the sintering treatment process; then preserving the heat for 1-2h, and finally cooling to room temperature.
Particularly, the temperature in the high-temperature sintering furnace is controlled to rise to 600 ℃ within 9 hours in the sintering treatment process; then keeping the temperature for 1h, and finally cooling to room temperature.
In particular, further comprising step 4): and (3) simply machining (such as thickness grinding, arc grinding and the like) the sintered carbon brush blank to obtain the carbon brush for the electric seat motor.
Compared with the prior art, the carbon brush for the electric seat motor has the advantages that:
1. the carbon brush for the electric seat motor has the advantages of reasonable raw material composition, scientific formula, excellent wear resistance and long service life.
2. The carbon brush for the motor uses the antifriction material molybdenum disulfide, so that the lubricating property of the carbon brush in the running process is improved, the friction coefficient is reduced, the wear resistance of the carbon brush is improved, and the service life of the carbon brush is prolonged.
3. Zinc borate (HBO) is used in carbon brush for motor 3 Zn), during the sintering treatment process of the carbon brush, zinc borate promotes the carbonization of the carbon brush during the carbonization of the phenolic resin, the open porosity is improved, uniform air holes are formed, the uniformity of the formed air holes is improved, the air holes absorb noise generated during the operation of the motor, and the noise is reduced.
4. The noise of the carbon brush for the electric seat using the carbon brush for the motor is less than or equal to 35db in the using process, and the carbon brush can be used for the electric seat motor of a middle-high-end automobile instead of an imported carbon brush or a carbon brush produced by a foreign enterprise, so that the production cost of the middle-high-end automobile is reduced.
5. The preparation method of the carbon brush for the electric seat motor is simple, the preparation process is scientific, the product quality is stable, and the carbon brush for the electric seat motor is suitable for a low-voltage direct current (DC0-12V) brush motor.
Detailed Description
The invention is further described below in conjunction with specific embodiments, and the advantages and features of the invention will become more apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
EXAMPLE 1 preparation of a gummy powder
1. Preparing raw materials (kg) according to the following mixture ratio:
graphite powder 95
Molybdenum disulfide 5
Liquid resin 30
Wherein, the carbon content of the graphite powder is 98.5 percent (usually, the carbon content is more than or equal to 98 percent); granularity: +100 mesh: less than 0.05 percent; -200 mesh: more than or equal to 95 percent; 325 mesh: 80 to 90 percent; particle size of molybdenum disulfide: d501-3 μm; d98 is less than 10 mu m; the liquid resin is liquid phenolic resin with solid content of 50 percent;
in the specific embodiment of the invention, the liquid phenolic resin with a solid content of 50% is taken as an example for illustration, and other liquid phenolic resins with a solid content of 45-55% are all suitable for the invention; other liquid resins having a liquid solids content of 45-50% are also suitable for use in the present invention, such as urea formaldehyde resins and the like.
The amount of liquid resin is illustrated by the ratio of the amount of liquid phenolic resin to the total amount of graphite powder and molybdenum disulfide mixed dry powder being 30:100, other ratios such as (25-35):100 are also suitable for use in the present invention.
The weight ratio of the graphite powder to the molybdenum disulfide is described by taking 95:5 as an example, and the other ratios are (90-98): (2-10) are all suitable for the present invention.
2. Adding liquid phenolic resin (with solid content of 50 percent and solid content of 45-55 percent in general) into an acetone solvent, stirring by using a liquid stirrer, uniformly stirring the phenolic resin and the acetone, and fully dissolving the phenolic resin in the acetone to prepare a phenolic resin-acetone solution, wherein the ratio of the dosage (weight) of the acetone solvent to the total weight of the graphite powder and the molybdenum disulfide is 20:100 (15-25 percent in general); the stirring rate is 30rpm (usually 25-35 rpm);
3. Adding graphite powder and molybdenum disulfide into a mixing pot, stirring and mixing for 0.5-1h, and uniformly mixing to prepare mixed dry powder; then adding the phenolic resin-acetone solution into the mixing pot, and stirring and mixing for 30-40 min; after uniformly mixing, placing the mixed materials in an iron plate, and uniformly paving the materials, wherein the paving thickness is not more than 5 mm; and then pushing the iron plate into an oven, drying at the temperature of 50-55 ℃, crushing after drying for 10-12h, and finally sieving by adopting a 45-mesh sieve to prepare colloid powder, wherein the granularity of the colloid powder is less than or equal to 45 meshes for later use.
Example 2 preparation of carbon brush
1. The raw materials (kg) are prepared according to the following mixture ratio
Copper powder 35
Colloid powder 64.5
0.5 part of zinc borate
Wherein the copper powder is electrolytic copper powder, and the copper content is 99.6% (usually, the copper content is more than 99.5%); the granularity is +200 meshes and is less than or equal to 1 percent; 325 meshes of more than or equal to 90 percent; the apparent specific density is 0.8-0.95g/cm 3 (usually. ltoreq.1.0 g/cm 3 ) (ii) a The zinc borate is amorphous powder; a gum powder was prepared from example 1;
2. putting copper powder, colloid powder and zinc borate into a V-shaped mixing pot in proportion, stirring and mixing for 1h (usually 0.5-1.5h) at a stirring speed of 7-8rpm, and uniformly mixing to prepare pressed powder; then, the uniformly mixed pressed powder is placed in a die, a pressing machine (pressing equipment) is used for carrying out pressing forming treatment, and the pressed powder is pressed into a carbon brush primary blank, wherein the pressure in the pressing forming treatment process is 3.5t/cm 2 (i.e., 3.5 tons/cm) 2 Usually 3 to 4t/cm 2 ) (ii) a The press-molding treatment (i.e., dwell treatment) time is 1s (usually 0.5 to 1.5 s);
3. placing the pressed carbon brush primary blank in a high-temperature sintering furnace, and sintering under the protection of nitrogen and hydrogen; wherein the volume ratio of the hydrogen to the nitrogen is 75:25 (usually the volume ratio of the hydrogen to the nitrogen is (70-80): 20-30)); the sintering process conditions are as follows: raising the temperature in the high-temperature sintering furnace to 600 ℃ (usually 500-
The embodiment of the invention is illustrated by taking the case that the volume ratio of the hydrogen to the nitrogen is 75:25, and other volume ratios of the hydrogen to the nitrogen (70-80) to (20-30) are all suitable for the invention.
4. And (4) performing machining such as thickness grinding, radian grinding and the like on the sintered carbon brush blank to obtain the carbon brush for the electric seat motor.
Measuring the volume density of the prepared carbon brush according to a method of JB/T8133.14-1999 volume density of physical and chemical property test method of electrical carbon products; the Shore hardness of the prepared carbon brush was measured according to the method of JB/T8133.4-1999 Shore hardness of test method for physical and chemical Properties of Electrical carbon products; according to JB/T8133.7-2013 part 7 of physical and chemical property test method of electric carbon products: the bending strength of the carbon brush was measured by the method of "bending strength", and the open porosity of the carbon brush was measured by the method of "porosity of physical and chemical properties test method for electrical carbon product" of JB/T8133.15-1999, and the measurement results are shown in table 1.
Example 3 preparation of carbon brush
1. The raw materials (kg) are prepared according to the following mixture ratio
Copper powder 35
Colloidal powder 62
Zinc borate 3
2. Same as example 2, step 2;
3. except that the sintering process conditions in the sintering treatment process are as follows: the temperature in the high-temperature sintering furnace is increased to 500 ℃ within 10 hours, and the steps are the same as the step 3 in the embodiment 2;
4. same as in step 4 of example 2.
The test results of the physical properties of the carbon brush are shown in table 1.
Example 4 preparation of carbon brush
1. The raw materials (kg) are prepared according to the following mixture ratio
Copper powder 35
Colloidal powder 63
Zinc borate 2
2. Except that the pressure during the press forming process is 4t/cm 2 Otherwise, the rest is the same as the step 2 of the embodiment 2;
3. same as example 2, step 3;
4. same as in step 4 of example 2.
The test results of the physical properties of the carbon brush are shown in table 1.
Example 5 preparation of carbon brush
1. The raw materials (kg) are prepared according to the following mixture ratio
Copper powder 35
Colloidal powder 60
Zinc borate 5
2. Except that the pressure during the press forming process was 3t/cm 2 Otherwise, the rest is the same as the step 2 of the embodiment 2;
3. except that the sintering process conditions in the sintering treatment process are as follows: the temperature in the high-temperature sintering furnace is increased to 700 ℃ within 8h, and the rest is the same as the step 3 of the embodiment 2;
4. same as in step 4 of example 2.
The test results of the physical properties of the carbon brush are shown in table 1.
Comparative example 1 preparation of carbon brush
1. The raw materials (kg) are prepared according to the following mixture ratio
Copper powder 35
Colloidal powder 65
Wherein, the copper powder and the colloid powder are the same as the embodiment 2;
2. putting copper powder and colloid powder into a V-shaped mixing pot in proportion, stirring and mixing for 45min (usually 0.5-1h), and stirring and mixing uniformly to prepare pressed powder; then, the uniformly mixed pressed powder is placed in a die, a pressing machine (pressing equipment) is used for carrying out pressing forming treatment, and the pressed powder is pressed into a carbon brush primary blank, wherein the pressure in the pressing forming treatment process is 3.5t/cm 2 ；
3. Placing the pressed carbon brush blank in a high-temperature sintering furnace, and sintering under the protection of nitrogen and hydrogen according to the same process control conditions as the step 3 of the embodiment 2 to obtain a carbon brush blank;
4. and (4) performing machining such as thickness grinding, radian grinding and the like on the sintered carbon brush blank to obtain the carbon brush for the electric seat motor.
The test results of the physical properties of the prepared carbon brush are shown in table 1.
Table 1 physical property test results of carbon brush for electric seat motor
Noise performance test
The carbon brushes prepared in the embodiments 2 to 4 and the comparative example 1 are respectively arranged in an electric seat motor, the noise in the operation process of the motor is tested in a noise room, and the noise performance test is carried out according to the national standard GB3806-81 Motor noise measuring method. Testing and adjusting: the distance between the motor and the test equipment is 75 cm; the results of the test were averaged for 5 replicates per sample and are given in Table 2.
TABLE 2 noise Performance test results
From the noise test results of table 2, it can be seen that: the zinc borate is added into the carbon brush, so that the noise generated during the operation of the motor of the electric seat can be obviously reduced. And the addition of a proper amount of zinc borate is beneficial to reducing the noise of the seat motor, but the addition amount is too large, so that the motor has screaming sound due to the increased hardness.
The above-described embodiments of the present invention are merely exemplary and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a carbon brush for electric seat motor, characterized by includes raw materials copper powder, colloid powder and zinc borate, wherein the colloid powder comprises graphite powder, molybdenum disulfide and liquid resin, the ratio of the part by weight sum of the mixed material of raw materials copper powder and colloid powder, zinc borate is 35: 65; the proportion of the zinc borate in parts by weight in the total weight of the raw materials of the carbon brush is less than 5%; the weight ratio of the colloid powder to the zinc borate is (60-65): (0-5);
The colloid powder is prepared by the following method:
1) preparing the raw materials according to the following weight portion
90-98 parts of graphite powder
2-10 parts of molybdenum disulfide
Liquid resin 25-35
The liquid resin is phenolic resin or urea resin with solid content of 45-55%;
2) adding liquid resin into an acetone solvent, uniformly stirring, and fully dissolving the liquid resin into acetone to prepare a liquid resin-acetone solution; wherein the ratio of the dosage of the acetone solvent to the total weight of the graphite powder and the molybdenum disulfide is (15-25): 100;
3) adding graphite powder and molybdenum disulfide into a mixing pot, and uniformly mixing to prepare mixed dry powder; and then adding a liquid resin-acetone solution, uniformly mixing, and then sequentially performing drying treatment, crushing treatment and screening treatment to obtain the colloid powder.
2. The carbon brush according to claim 1, wherein the weight ratio of the colloidal powder to the zinc borate is (62-63): (2-3).
3. The carbon brush according to claim 1 or 2, wherein the colloid powder in step 1) is prepared from graphite powder, molybdenum disulfide and liquid resin in parts by weight: 95 parts of graphite powder, 5 parts of molybdenum disulfide, liquid resin and 30 parts of graphite powder.
4. The carbon brush as claimed in claim 1 or 2, wherein the liquid resin is a phenol resin having a solid content of 45 to 55%.
5. The carbon brush according to claim 1 or 2, wherein a ratio of an amount of the acetone solvent to a total weight of the graphite powder and the molybdenum disulfide in the step 2) is 20: 100.
6. The carbon brush according to claim 1 or 2, wherein the temperature of the drying process in step 3) is 50 to 55 ℃; the granularity of the colloid powder is less than or equal to 45 meshes.
7. A carbon brush for an electric seat motor is characterized by being prepared according to the following method:
A) preparing materials according to the following weight parts:
copper powder 35
60-65 parts of colloid powder
0 to 5 portions of zinc borate
Wherein the colloid powder is prepared by the following method:
A1) preparing the following raw materials in parts by weight
90-98 parts of graphite powder
2-10 parts of molybdenum disulfide
Liquid resin 25-35
The liquid resin is phenolic resin or urea resin with solid content of 45-55%;
A2) adding liquid resin into an acetone solvent, uniformly stirring, and fully dissolving the liquid resin into acetone to prepare a liquid resin-acetone solution; wherein the ratio of the dosage of the acetone solvent to the total weight of the graphite powder and the molybdenum disulfide is (15-25): 100;
A3) adding graphite powder and molybdenum disulfide into a mixing pot, and uniformly mixing to prepare mixed dry powder; then adding a liquid resin-acetone solution, uniformly mixing, and then sequentially performing drying treatment, crushing treatment and screening treatment to obtain the colloid powder;
B) Uniformly mixing copper powder, colloid powder and zinc borate in proportion to prepare pressed powder; then, placing the pressed powder in a mold, performing compression molding treatment by using a press, and pressing the pressed powder into a carbon brush primary blank;
C) and (3) placing the pressed carbon brush primary blank in a high-temperature sintering furnace, and sintering under the protection of nitrogen and hydrogen to obtain the carbon brush primary blank.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106299969A (en) * | 2015-05-19 | 2017-01-04 | 苏州东南碳制品有限公司 | A kind of preparation method of trapezoidal seat carbon brush used for electric engine |
| CN106505392A (en) * | 2015-09-08 | 2017-03-15 | 苏州东南碳制品有限公司 | A kind of passenger car start and stop carbon brush used for electric engine |
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2021
- 2021-04-25 CN CN202110446175.5A patent/CN113224606B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106299969A (en) * | 2015-05-19 | 2017-01-04 | 苏州东南碳制品有限公司 | A kind of preparation method of trapezoidal seat carbon brush used for electric engine |
| CN106505392A (en) * | 2015-09-08 | 2017-03-15 | 苏州东南碳制品有限公司 | A kind of passenger car start and stop carbon brush used for electric engine |
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