CN104779511A - Manufacturing method of electric brush for treadmill motor and electronic brush manufactured using same - Google Patents
Manufacturing method of electric brush for treadmill motor and electronic brush manufactured using same Download PDFInfo
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- CN104779511A CN104779511A CN201410017325.0A CN201410017325A CN104779511A CN 104779511 A CN104779511 A CN 104779511A CN 201410017325 A CN201410017325 A CN 201410017325A CN 104779511 A CN104779511 A CN 104779511A
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- brush
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- machine motor
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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
- 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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- 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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- Motor Or Generator Current Collectors (AREA)
Abstract
The present invention discloses a manufacturing method of an electric brush for a treadmill motor and an electronic brush manufactured using the method. The materials of the electric brush for the motor belong to the field of material science. The manufacturing method of the electric brush comprises: firstly, uniformly mixing graphite, carbon black, an additive, an adhesive and a firming agent under a condition of heating, then smashing and placing the mixture in a mold, and shaping the mixture via pressing; and secondly, conducting curing treatment, cutting, grinding, punching and line adding. The electric brush for the treadmill motor manufactured using the method is low in noise caused during operation, low in resistance, good in direction switching performance, powerful in interference resistance and long in service life. most importantly, the electric brush is high in abrasion resistance, low in noise and spark grade, sparkless in empty load, and good in product stability.
Description
Technical field
The present invention relates to brush for electromachine, particularly relate to a kind of running machine motor brush and preparation method thereof, belong to machine field.And be widely used on medical industry, body-building apparatus industry, physical culture industry and family expenses running machine motor.
Background technology
Motor brush is the device of transferring energy or signal between the standing part of the rotating machinery such as motor or generator and rotating part.Also known as carbon brush.Carbon brush is generally that pure carbon adds coagulating agent and makes, and external form is generally square, is stuck on metallic support, and there is spring handle the inside, and it is pressed in rotating shaft, is do sliding contact with movement parts and form a kind of conductive component be electrically connected.The appearance of carbon brush, a little as wiping the rubber bar of pencil, top has wire draw.Volume varies.Carbon brush is a kind of for commutator or slip ring, as the slide contact member importing and exporting electric current, is widely used in many electric equipments.Its conduction, heat conduction and greasy property well, and have the instinct of certain mechanical strength and commutation property spark.Nearly all direct current machine and commutating machine all use brush, and it is the important composition parts of motor.
Brush can be divided into soft brush by the soft or hard of material, middle hard brush and hard brush; Turbo generator brush can be divided into, steel mill electric machine brush, traction electric machine brush, automobile and tractor brush, electric brush for electric tool, aircrafts electric machinery electricity consumption etc. by the use object of brush; Black electrical brush (making with pure carbon graphite material) and color brush (making with the metal materials such as copper and graphite) is divided into by the color of brush; By the difference of brush material, can be divided into: (1) electrographite brush.(2) electrographite brush.(3) metal graphite brush.
Brush product material mainly contains electrographite, leaching fat graphite, metal (cupric, silver) graphite.In China's recommended industry standard " JB/T4003-2001 brush for electromachine ", brush is divided into four large classes: electrographite brush, electrographite brush, resin bonded graphite brush, metal graphite brush.Brush is widely used in various double current generator, synchronous motor, storage battery DC motor, crane motor collecting ring, various electric welding machine etc.Along with the development of science and technology, the kind of motor and the working condition of use more and more diversified, thus need the brush of various different grade to meet these requirements, therefore the kind of brush also gets more and more along with the development of electric machine industry.People, in order to use and managerial convenience, classify to numerous brushes.
In prior art, general employing carbon, graphite composite powder are base-material, and be adhesives with resin, through kneading, abrasive dust, shaping and solidification manufacture brush, as the patent No. Chinese invention patent that is 200610052676 discloses a kind of brush of motor, the composition material of brush is formed by copper-plated composite powder particle and carbon fiber, outer carbon dust, outer layer binder calendering, consisting of (weight portion) of wherein said composite powder particle: carbon dust 65-79, binding agent 0.5-10, alloying element 1.5-11; Described copper-plated be 10-35; Described carbon fiber is 0.3-0.9; Described outer carbon dust is 10-18; Described outer layer binder is 0.3-6; Binding agent is wherein the mixture of phenolic resins and epoxy resin, and the resistance to wear of the brush that this patent system is standby is good, resistivity is low.
And for example the patent No. is that the patent of invention of 97106640.X discloses a kind of brush for electromachine and preparation method thereof, this motor brush by the graphite powder of copper facing or silver or carbon dust, carbonaceous powders or/and metal dust, binding agent form, the graphite powder of copper facing or silver or the content of carbon dust are 10-100%, carbonaceous powders or metal dust or both mixed content are 0-90%, according to above-mentioned two kinds of content, the content of binding agent is 0-20%.Manufacturing process is: first by each component mix and blend, then suppress, then sinter, suppress again, finally carry out processing and forming.The brush for electromachine of this invention has very strong practical value in automobile, aviation, electric electromechanics trade.
Running machine motor alternating current machine because of the feature that its volume is little, rotating speed is high, possess by requiring brush that commutation ability is good, anti-wear performance is excellent, long service life, environmental protection, the anti-interference advantage such as by force; In addition, the commutation due to running machine motor requires harsh, requires that the commutation of brush will be got well, and suppresses spark to require high.But, general brush serviceability is poor, stability is bad, and brush unit pressure is too high, and resistance is large, hardness is high, the general noise of existing running machine motor brush is large, suppression spark ability, cause the wearing and tearing of running machine motor brush to aggravate, unit pressure is too small, and contact is unstable, commutation ability is poor, easily occurs mechanical spark.Particularly wear no resistance, commutation ability is poor, poor anti jamming capability, Chang Wufa meets the various requirement of motor to brush.
Summary of the invention
Primary and foremost purpose of the present invention provides a kind of running machine motor brush and preparation method thereof for above-mentioned prior art Problems existing, brush for electromachine resistivity of the present invention is low, resistance to wear good, commutation ability good, antijamming capability is strong and long service life, the more important thing is that there is high-wearing feature, noise is low, grade of spark is low, unloaded time no-spark, product stability is good.
For realizing object of the present invention, one aspect of the present invention provides a kind of preparation method of running machine motor brush, comprises
1) in a heated condition, raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are mixed, obtained premix;
2) raw material binding agent mixed with solvent acetone, dissolve, mix, obtained binder solution;
3) after premix being mixed with binder solution, place, obtained brush raw mixture;
4) successively drying and processing, break process are carried out to brush raw mixture, obtained brush material mix powder shape;
5) compression process is carried out to brush material mix powder, obtained brush crude green body;
6) brush crude green body is carried out baking and curing process, obtained brush blank;
7) the brush blank after solidification process carried out cutting, grinding, turn hole, add line and get final product.
Wherein, step 1), step 2) described in raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent, binding agent weight be: native graphite 25-55, Delanium 30-70, expanded graphite 1-10, carbon black 5-15, additive 0.5-4.0, curing agent 0.5-3, binding agent 15-30.
Particularly, the weight of described raw material is preferably: native graphite 30-50, Delanium 40-60, expanded graphite 3-5, carbon black 8-13, additive 1.5-3.5, curing agent 1-2, binding agent 20-28.
Especially, the granularity of described native graphite is 200-300 order, carbon content >=99%, ash≤1%; The granularity of described Delanium is 200-300 order, carbon content >=99%, ash≤1%, moisture content≤1%; The granularity of described expanded graphite is 200-300 order, carbon content >=99%, ash≤1%, moisture content≤1%; The granularity of described carbon black is 100-120 order.
Wherein, described additive selects molybdenum bisuphide and paraffin.Additive molybdenum bisuphide and paraffin have excellent frictional behaviour, and coefficient of friction is lower, and compression strength is large.
Particularly, the weight of described molybdenum bisuphide and paraffin is 1:1-2.1, is preferably 1:1.3-2.
Especially, the average grain diameter of described additive is 200-300 order, and be preferably 200 orders, molybdenum bisuphide has excellent frictional behaviour, and coefficient of friction is lower, and compression strength is large.
Especially, described melting point of paraffin wax is 52-60 DEG C.Paraffin has that intermiscibility is good, commutation ability is good, suppresses spark performance strong.
Wherein, epoxy curing agent selected by described curing agent.
Particularly, described epoxy curing agent selects epoxy resin latent curing agent.
Especially, described epoxy resin lalent solidifying agent selects modified aliphatic amine, aromatic diamines dicyandiamide class, imidazoles organic acid anhydride class, organic hydrazides class, lewis acid or microcapsules based epoxy resin latent curing agent.
Particularly, described epoxy resin lalent solidifying agent adipic dihydrazide and T-31 curing agent, be preferably T-31 curing agent.
Especially, described T-31 curing agent is a kind of phenolic aldehyde amine (PAA) epoxy hardener of performance synthesis, light brown clear viscous liquid, density (20 DEG C) 1.08 ~ 1.09g/cm & sup3; .Amine value 460 ~ 550mgKOH/g.Refractive index 1.5250 ~ 1.5300.Flash-point (opening cup) 75 DEG C.Viscosity (25 DEG C) 1000 ~ 1300mPa.s.
Wherein, described binding agent selects epoxy resin, phenolic resins, is preferably epoxy resin.
Particularly, described epoxy resin is diglycidyl ether type epoxy resin.
Especially, described epoxy resin is the bisphenol A type epoxy resin in glycidyl ether type epoxy resin.
Particularly, the epoxide number of described epoxy resin is 0.25-0.45.
Especially, described epoxy resin selects the glycidyl ether type epoxy resin by diphenol propane and epoxychloropropane polycondensation.
Native graphite of the present invention has the features such as quality is light, conduction, heat conduction, greasy property is good, machining property is excellent, and particularly select crystalline flake graphite, its average grain diameter is 300 orders, carbon content >=99%, ash≤1%; Delanium has the features such as anti-wear performance is good, consistent internal structure, degree of graphitization are high, ash is few, and its average grain diameter is 200 orders, carbon content >=99%, ash≤1%, moisture content≤1%; Described expanded graphite have bulk density little, make that the close property of material system is good, the later stage suppresses spark when running, its average grain diameter is 200 orders, carbon content >=99%, ash≤1%, moisture content≤1%, expanded graphite material is soft, wear-resistant, enhance the anti-wear performance of brush, interference free performance and commutation ability, when contacting with commutator, spark is little; Epoxy resin of binder is in brush preparation process, by hot setting, active group open chain in resin also links with the group in graphite and additive component, and various material structure is bonded together, make that material structure is finer and close, stable performance, play the effect of adhesive.
Wherein, the temperature of heating condition described in step 1) is 120-200 DEG C, is preferably 150-170 DEG C; The Impurity removal that heating makes moisture in raw material, ash grades, guarantees the moisture <0.5% in raw material.
Particularly, mixed by raw material by stirring in step 1), mixing time is 1-2.5h, is preferably 1.5-2h.
Especially, step 1) also comprises the material mixed is cooled to less than 40 DEG C, for subsequent use.
Wherein, step 2) described in the weight of binding agent and solvent acetone be 1:1.5-1.8, be preferably 1:1.6-1.75.
Particularly, described premix mixed with binder solution by stirring in step 3), mixing time is 1-2.0h, is preferably 1.0-1.5h.
Particularly, also comprise and at least 24h is placed in the premix mixed and binder solution, solvent flashing acetone.
Wherein, drying and processing described in step 4) stabilize to 80-100 DEG C, be preferably 85-95 DEG C; Drying time is 8-12h; Granularity≤80 order of described brush material mix powder.
Wherein, in the compressing process described in step 5), the bulk density of control brush crude green body is 1.62-1.66g/cm
3.
Wherein, the temperature of solidifying process described in step 6) is 180-200 DEG C; The solidification processing time is 7-10h.
Particularly, first the temperature of brush crude green body is warming up to 160-180 DEG C in 5-6h, then at temperature is 160-180 DEG C, keeps 2-4h.
Especially, heating rate is 20-32 DEG C/h, is preferably 22.5-32 DEG C/h.
Running machine motor electricity consumption brush of the present invention has the following advantages:
1, the preparation process Raw of running machine motor brush of the present invention adds rationally, add resin as binding agent, the brush for electromachine anti-wear performance of preparation is excellent, noise is low, long service life, environmental protection, by force anti-interference, anti-wear performance improves more than 20%, the noise of brush use procedure of the present invention is low, and noise is low to moderate 60-67 decibel.
2, use molybdenum bisuphide in brush for electromachine of the present invention, motor commutation performance is good, and stability is high, anti-interference strong and can properties of brush be protected unaffected in various environment.
3, use expanded graphite, paraffin in running machine motor brush preparation of the present invention, inhibit in brush use procedure and occur mechanical spark, grade of spark is low, no-spark time unloaded, and spark reduces at least 1 grade, extends the service time of brush.
4, the resistivity of running machine motor brush prepared of the inventive method is low, resistance to wear good, commutation ability good, antijamming capability is strong, long service life, can meet the various requirement of electric tool motor to brush preferably, applied range.
5, the preparation method of brush for electromachine of the present invention is simple, and preparation technology is simple, constant product quality successful, and easy to use.
6, the running machine motor brush that prepared by the present invention is applicable to high voltage (180V) treadmill and uses, and is particularly useful for China running machine motor and uses.
Embodiment
Further describe the present invention below in conjunction with specific embodiment, advantage and disadvantage of the present invention will be more clear along with description.But these embodiments are only exemplary, do not form any restriction to scope of the present invention.It will be understood by those skilled in the art that and can modify to the details of technical solution of the present invention and form or replace down without departing from the spirit and scope of the present invention, but these amendments and replacement all fall within the scope of protection of the present invention.
The granularity of the native graphite used in the present invention is 200-300 order, carbon content >=99%, ash≤1%; The granularity of described Delanium is 200-300 order, carbon content >=99%, ash≤1%, moisture content≤1%; The granularity of described expanded graphite is 200-300 order, carbon content >=99%, ash≤1%, moisture content≤1%; The granularity of described carbon black is 100-120 order.
Embodiment 1
1, (kg) is got the raw materials ready according to following weight proportion:
Wherein, additive comprises molybdenum bisuphide and paraffin, and the weight proportion of molybdenum bisuphide and paraffin is 1:1.5; Bisphenol A type epoxy resin selected by binding agent, and its epoxide number is 0.25-0.45; Latent curing agent T-31 curing agent (mountain peak, Changzhou Chemical Co., Ltd.) selected by described curing agent;
2) raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are placed in kneading pot, open the heater of kneading pot, be heated to 150 DEG C, mix 2h at 150 DEG C after, stop heating, treat material be cooled to≤40 DEG C, obtained premix;
The Impurity removal that heating makes moisture in raw material, ash grades, guarantees the moisture <0.5% in raw material.
3) epoxy resin of binder of 28kg is dissolved in the acetone of 45kg, mixes, obtained binder solution;
4) binder solution joined stirring in premix, mix, stir 1.5h, mix rear taking-up material, place under room temperature (20 DEG C), acetone volatilizees, and places more than 24h, obtains brush raw mixture;
5) first brush raw mixture is placed in baking oven and carries out drying and processing, remove acetone, obtained not containing the raw mixture of acetone, wherein the temperature of drying and processing is 100 DEG C, and the drying and processing time is 10h; Then the material after oven dry is carried out break process, broken material crosses 80 mesh sieves, obtained brush material mix powder, brush material mix powder granularity≤80 order;
Dry and remove acetone solvent further, acetone is volatilized completely.
6) brush material mix powder is placed in mould, hydraulic press is adopted to carry out compression process, compression molding under 10MPa pressure, i.e. obtained running machine motor brush crude green body, the bulk density wherein controlling running machine motor brush crude green body reaches 1.64-1.66g/cm
3, stop compressing process;
7) brush crude green body is placed in baking oven in 5h, had by oven temperature room temperature (20 DEG C) to be increased to 180 DEG C, wherein heating rate is 32 DEG C/h; Then at temperature is 180 DEG C, 2h is kept, the brush blank after obtained solidification process;
8) the brush blank after solidification process carried out cutting, grinding machine, hole, fill out line and namely obtain running machine motor brush.
According to JB/T8133.14-1999(electric carbon product physical and chemical performance test method bulk density) method measure the bulk density of running machine motor brush; According to JB/T8133.2-1999(electric carbon product physical and chemical performance test method resistivity) method measures the resistivity of running machine motor brush; Adopt the Shore hardness of HS-19CTV type hardness tester machine private wiper, the results are shown in Table 1.
Embodiment 2
1, (kg) is got the raw materials ready according to following weight proportion:
Wherein, additive comprises molybdenum bisuphide and paraffin, and the weight proportion of molybdenum bisuphide and paraffin is 0.5:1; Bisphenol A type epoxy resin selected by binding agent, and its epoxide number is 0.25-0.35; Latent curing agent adipic dihydrazide (Wuxi City Liang Xi Fine Chemical Co., Ltd) selected by described curing agent.
2) raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are placed in kneading pot, open the heater of kneading pot, be heated to 170 DEG C, mix 1.5h at 170 DEG C after, stop heating, treat material be cooled to≤40 DEG C, obtained premix;
3) epoxy resin of binder of 20kg is dissolved in the acetone of 35kg, mixes, obtained binder solution;
4) binder solution joined stirring in premix, mix, stir 1h, mix rear taking-up material, place under room temperature (35 DEG C), acetone volatilizees, and places more than 24h, obtains brush raw mixture;
5) first brush raw mixture is placed in baking oven and carries out drying and processing, remove acetone, obtained not containing the raw mixture of acetone, wherein the temperature of drying and processing is 90 DEG C, and the drying and processing time is 12h; Then the material after oven dry is carried out break process, broken material crosses 80 mesh sieves, obtained brush material mix powder, brush material mix powder granularity≤80 order;
6) brush material mix powder is placed in mould, hydraulic press is adopted to carry out compression process, compression molding under 8.5MPa pressure, i.e. obtained running machine motor brush crude green body, the bulk density wherein controlling running machine motor brush crude green body reaches 1.62-1.66g/cm
3, stop compressing process;
7) brush crude green body is placed in baking oven in 6h, oven temperature is increased to 170 DEG C by room temperature (35 DEG C), and wherein heating rate is 22.5 DEG C/h; Then at temperature is 170 DEG C, 3h is kept, the brush blank after obtained solidification process;
8) the brush blank after solidification process carried out cutting, grinding machine, hole, fill out line and namely obtain running machine motor brush.
According to JB/T8133.14-1999(electric carbon product physical and chemical performance test method bulk density) method measure the bulk density of running machine motor brush; According to JB/T8133.2-1999(electric carbon product physical and chemical performance test method resistivity) method measures the resistivity of running machine motor brush; Adopt the Shore hardness of HS-19CTV type hardness tester machine private wiper, the results are shown in Table 1.
Embodiment 3
1, (kg) is got the raw materials ready according to following weight proportion:
Wherein, additive comprises molybdenum bisuphide and paraffin, and the weight proportion of molybdenum bisuphide and paraffin is 1.5:2; Bisphenol A type epoxy resin selected by binding agent, and its epoxide number is 0.25-0.45; Epoxy resin latent curing agent T-31 curing agent selected by described curing agent.
2) raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are placed in kneading pot, open the heater of kneading pot, be heated to 160 DEG C, mix 1.5h at 160 DEG C after, stop heating, treat material be cooled to≤40 DEG C, obtained premix;
3) epoxy resin of binder of 24kg is dissolved in the acetone of 40kg, mixes, obtained binder solution;
4) binder solution joined stirring in premix, mix, stir 1.5h, mix rear taking-up material, place under room temperature (25 DEG C), acetone volatilizees, and places more than 24h, obtains brush raw mixture;
5) first brush raw mixture is placed in baking oven and carries out drying and processing, remove acetone, obtained not containing the raw mixture of acetone, wherein the temperature of drying and processing is 90 DEG C, and the drying and processing time is 8h; Then the material after oven dry is carried out break process, broken material crosses 80 mesh sieves, obtained brush material mix powder, brush material mix powder granularity≤80 order;
6) brush material mix powder is placed in mould, hydraulic press is adopted to carry out compression process, compression molding under 12MPa pressure, i.e. obtained running machine motor brush crude green body, the bulk density wherein controlling running machine motor brush crude green body reaches 1.62-1.64g/cm
3, stop compressing process;
7) brush crude green body is placed in baking oven in 5.5h, oven temperature is increased to 160 DEG C by room temperature (25 DEG C), and wherein heating rate is 24.5 DEG C/h; Then at temperature is 160 DEG C, 4h is kept, the brush blank after obtained solidification process;
8) the brush blank after solidification process carried out cutting, grinding machine, hole, fill out line and namely obtain running machine motor brush.
According to JB/T8133.14-1999(electric carbon product physical and chemical performance test method bulk density) method measure the bulk density of running machine motor brush; According to JB/T8133.2-1999(electric carbon product physical and chemical performance test method resistivity) method measures the resistivity of running machine motor brush; Adopt the Shore hardness of HS-19CTV type hardness tester machine private wiper, the results are shown in Table 1.
Embodiment 4
1, (kg) is got the raw materials ready according to following weight proportion:
Wherein, additive comprises molybdenum bisuphide and paraffin, and the weight proportion of molybdenum bisuphide and paraffin is 1.3:2.7; Bisphenol A type epoxy resin selected by binding agent, and its epoxide number is 0.25-0.45; Latent curing agent T-31 curing agent selected by described curing agent;
2) raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are placed in kneading pot, open the heater of kneading pot, be heated to 200 DEG C, mix 1h at 200 DEG C after, stop heating, treat material be cooled to≤40 DEG C, obtained premix;
3) epoxy resin of binder of 30kg is dissolved in the acetone of 45kg, mixes, obtained binder solution;
4) binder solution joined stirring in premix, mix, stir 2h, mix rear taking-up material, place under room temperature (35 DEG C), acetone volatilizees, and places more than 24h, obtains brush raw mixture;
5) first brush raw mixture is placed in baking oven and carries out drying and processing, remove acetone, obtained not containing the raw mixture of acetone, wherein the temperature of drying and processing is 100 DEG C, and the drying and processing time is 8h; Then the material after oven dry is carried out break process, broken material crosses 80 mesh sieves, obtained brush material mix powder, brush material mix powder granularity≤80 order;
6) brush material mix powder is placed in mould, hydraulic press is adopted to carry out compression process, compression molding under 10MPa pressure, i.e. obtained running machine motor brush crude green body, the bulk density wherein controlling running machine motor brush crude green body reaches 1.62-1.66g/cm
3, stop compressing process;
7) brush crude green body is placed in baking oven in 6h, oven temperature is increased to 180 DEG C by room temperature (35 DEG C), and wherein heating rate is 24.2 DEG C/h; Then at temperature is 180 DEG C, 2h is kept, the brush blank after obtained solidification process;
8) the brush blank after solidification process carried out cutting, grinding machine, hole, fill out line and namely obtain running machine motor brush.
According to JB/T8133.14-1999(electric carbon product physical and chemical performance test method bulk density) method measure the bulk density of running machine motor brush; According to JB/T8133.2-1999(electric carbon product physical and chemical performance test method resistivity) method measures the resistivity of running machine motor brush; Adopt the Shore hardness of HS-19CTV type hardness tester machine private wiper, the results are shown in Table 1.
Embodiment 5
1, (kg) is got the raw materials ready according to following weight proportion:
Wherein, additive comprises molybdenum bisuphide and paraffin, and the weight proportion of molybdenum bisuphide and paraffin is 0.25:0.25; Bisphenol A type epoxy resin selected by binding agent, and its epoxide number is 0.25-0.45; Epoxy resin latent curing agent T-31 curing agent selected by described curing agent;
2) raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are placed in kneading pot, open the heater of kneading pot, be heated to 120 DEG C, mix 2.5h at 120 DEG C after, stop heating, treat material be cooled to≤40 DEG C, obtained premix;
3) epoxy resin of binder of 15kg is dissolved in the acetone of 27kg, mixes, obtained binder solution;
4) binder solution joined stirring in premix, mix, stir 1h, mix rear taking-up material, place under room temperature (30 DEG C), acetone volatilizees, and places more than 24h, obtains brush raw mixture;
5) first brush raw mixture is placed in baking oven and carries out drying and processing, remove acetone, obtained not containing the raw mixture of acetone, wherein the temperature of drying and processing is 80 DEG C, and the drying and processing time is 12h; Then the material after oven dry is carried out break process, broken material crosses 80 mesh sieves, obtained brush material mix powder, brush material mix powder granularity≤80 order;
6) brush material mix powder is placed in mould, hydraulic press is adopted to carry out compression process, compression molding under 8.5MPa pressure, i.e. obtained running machine motor brush crude green body, the bulk density wherein controlling running machine motor brush crude green body reaches 1.64-1.66g/cm
3, stop compressing process;
7) brush crude green body is placed in baking oven in 5h, oven temperature is increased to 160 DEG C by room temperature (30 DEG C), and wherein heating rate is 26 DEG C/h; Then at temperature is 160 DEG C, 3h is kept, the brush blank after obtained solidification process;
8) the brush blank after solidification process carried out cutting, grinding machine, hole, fill out line and namely obtain running machine motor brush.
According to JB/T8133.14-1999(electric carbon product physical and chemical performance test method bulk density) method measure the bulk density of running machine motor brush; According to JB/T8133.2-1999(electric carbon product physical and chemical performance test method resistivity) method measures the resistivity of running machine motor brush; Adopt the Shore hardness of HS-19CTV type hardness tester machine private wiper, the results are shown in Table 1.
Reference examples
Routine in contrast with commercially available running machine motor (the auspicious energy in Putian, 180V) brush.
The density of running machine motor brush is measured according to the method for JB/T8133.14-1999; The resistivity of running machine motor brush is measured according to JB/T8133.2-1999 method; Adopt HS-19CTV type hardness tester machine to measure the Shore hardness of brush, the results are shown in Table 1.
The physical performance index of table 1 brush
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Density g/cm 3 | 1.35 | 1.40 | 1.42 | 1.32 | 1.38 | 1.32 |
| Shore hardness | 16 | 20 | 22 | 14 | 18 | 25 |
| Resistance Ω | 3000 | 2000 | 1800 | 3500 | 2500 | 2500 |
The test result of table 1 shows: the bulk density of brush prepared by the present invention is low, and bulk density is 1.32-1.42g/cm
3; The hardness of running machine motor brush is low, and Shore hardness is 14-22; Resistance range is large, is applicable to high pressure (180V) running machine motor and uses.And the hardness of existing running machine motor brush is high, noise is large, and Shore hardness, more than 24, reaches 25-30, and resistance range is little, is only 1500-2300 Ω.
Test example 1 running machine motor wear of brush rate is tested
The motor for treadmill brush adopting bulb load long duration test controller testing example 1-5 to obtain, the wear rate of reference examples running machine motor brush, result of the test is in table 2.
The physical performance index of table 2 brush
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Wear rate mm/50H | 1.5 | 1.2 | 1.0 | 1.6 | 0.8 | 2.2 |
As seen from the results in Table 2: the wear rate of brush for electromachine of the present invention is low, wear rate is lower than 1.6mm/100H, and anti-wear performance is good, and commutation ability is good, and noise is low.Compared with common running machine motor brush, abrasion resistance properties improves more than 27.3, reaches 27.3-63.6%.
Test example 2 running machine motor brush is high pressure resistant, grade of spark test
According to high pressure resistant, the grade of spark of national standard " electric rotating machine main technique requirements (GB/T755-2000) " the electric-tool electromechanical brush that testing example 1-5 obtains, reference examples brush, result of the test is in table 3.
The performance test results of table 3 brush
Test result from table 3: the grade of spark of brush for electromachine of the present invention is low is 1
1/
4, compared with common running machine motor brush, grade of spark reduces 1 grade.
Test example 3 running machine motor brush noise test
The running machine motor brush obtained with noise tester testing example 1-5 under the condition of motor idle running, the noise of reference examples running machine motor brush, result of the test is in table 4.
Noise performance index test in the use procedure of table 4 brush
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Noise decibel | 65 | 67 | 67 | 62 | 65 | 70 |
Test result from table 4:
1, in running machine motor brush of the present invention use procedure, noise is low, and noise decibel is lower than 67, and noise decibel is only 62-67 decibel;
2, use running machine motor brush of the present invention, in treadmill running, noise is low, and user's sense organ sounds comfortable, does not have high frequency sounds, and noise is high in addition damages commutation aspect, directly contacts with commutator face, affects the commutator life-span.
Claims (10)
1. a preparation method for running machine motor brush, comprises the step that following order is carried out:
1) in a heated condition, raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent are mixed, obtained premix;
2) raw material binding agent mixed with solvent acetone, dissolve, mix, obtained binder solution;
3) after premix being mixed with binder solution, place, obtained brush raw mixture;
4) successively drying and processing, break process are carried out to brush raw mixture, obtained brush material mix powder shape;
5) compression process is carried out to brush material mix powder, obtained brush crude green body;
6) brush crude green body is cured process, obtained brush blank;
7) the brush blank after solidification process carried out cutting, grinding, turn hole, add line and get final product.
2. preparation method as claimed in claim 1, is characterized in that step 1), step 2) described in raw material native graphite, Delanium, expanded graphite, carbon black, additive, curing agent, binding agent weight be: native graphite 25-55, Delanium 30-70, expanded graphite 1-10, carbon black 5-15, additive 0.5-4.0, curing agent 0.5-3, binding agent 15-30.
3. preparation method as claimed in claim 2, is characterized in that the weight of described raw material is preferably: native graphite 30-50, Delanium 40-60, expanded graphite 3-5, carbon black 8-13, additive 1.5-3.5, curing agent 1-2, binding agent 20-28.
4. the preparation method as described in as arbitrary in claim 1-3, is characterized in that described additive selects molybdenum bisuphide and paraffin.
5. preparation method as claimed in claim 4, is characterized in that epoxy curing agent selected by described curing agent.
6. the preparation method as described in as arbitrary in claim 1-3, is characterized in that described binding agent selects epoxy resin or phenolic resins.
7. preparation method as claimed in claim 1, is characterized in that the temperature of drying and processing described in step 4) is 80-100 DEG C.
8. preparation method as claimed in claim 1, is characterized in that the bulk density of control brush blank in described compression process process in step 5) is 1.62-1.66g/cm
3.
9. preparation method as claimed in claim 1, the temperature that it is characterized in that solidifying described in step 6) process is 160-180 DEG C.
10. a running machine motor brush, is characterized in that being prepared from according to method as described in as arbitrary in claim 1-9.
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| CN106654796A (en) * | 2015-11-04 | 2017-05-10 | 苏州东翔碳素有限公司 | Treadmill motor electric brush preparation method |
| CN106654782A (en) * | 2015-11-04 | 2017-05-10 | 苏州东翔碳素有限公司 | Electric brush for treadmill motor |
| CN106654779A (en) * | 2015-11-04 | 2017-05-10 | 苏州东翔碳素有限公司 | Material for preparing brush for treadmill motors |
| CN107666102A (en) * | 2016-07-27 | 2018-02-06 | 苏州东翔碳素有限公司 | A kind of running machine motor brush |
| CN107666104A (en) * | 2016-07-27 | 2018-02-06 | 苏州东翔碳素有限公司 | A kind of preparation method of running machine motor brush |
| CN107666101A (en) * | 2016-07-27 | 2018-02-06 | 苏州东翔碳素有限公司 | A kind of material for being used to prepare running machine motor brush |
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| JP3872383B2 (en) * | 2002-06-06 | 2007-01-24 | 東炭化工株式会社 | Carbon brush |
| CN101651281A (en) * | 2008-08-11 | 2010-02-17 | 德昌电机(深圳)有限公司 | Graphite brush and preparation method thereof |
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| CN102280790A (en) * | 2011-05-31 | 2011-12-14 | 苏州东南碳制品有限公司 | Motor brush for small household appliances and manufacturing method of motor brush |
| CN103259150B (en) * | 2012-02-16 | 2015-10-28 | 苏州东南碳制品有限公司 | A kind of electric brush for electric tool motor and preparation method thereof |
| CN104779503B (en) * | 2014-01-15 | 2017-12-05 | 苏州东翔碳素有限公司 | A kind of running machine motor brush and preparation method thereof |
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2014
- 2014-01-15 CN CN201410017325.0A patent/CN104779511B/en active Active
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| CN106654796A (en) * | 2015-11-04 | 2017-05-10 | 苏州东翔碳素有限公司 | Treadmill motor electric brush preparation method |
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| CN107666102A (en) * | 2016-07-27 | 2018-02-06 | 苏州东翔碳素有限公司 | A kind of running machine motor brush |
| CN107666104A (en) * | 2016-07-27 | 2018-02-06 | 苏州东翔碳素有限公司 | A kind of preparation method of running machine motor brush |
| CN107666101A (en) * | 2016-07-27 | 2018-02-06 | 苏州东翔碳素有限公司 | A kind of material for being used to prepare running machine motor brush |
| CN108512006A (en) * | 2017-02-24 | 2018-09-07 | 上海新池能源科技有限公司 | A kind of copper-graphite-graphene brush and preparation method thereof |
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Effective date of registration: 20170122 Address after: Shuangfeng town Taicang city Suzhou City, Jiangsu province 215415 new Wenzhou Road No. 2 Applicant after: SUZHOU DONSUN CARBONWARE CO., LTD. Address before: Wenzhou Shuangfeng town Industrial Park Taicang city Suzhou city Jiangsu province 215415 Applicant before: Suzhou Donon Carbon Products Limited |
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