CN104779511B - The preparation method of running machine motor brush and the brush prepared by the method - Google Patents
The preparation method of running machine motor brush and the brush prepared by the method Download PDFInfo
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- CN104779511B CN104779511B CN201410017325.0A CN201410017325A CN104779511B CN 104779511 B CN104779511 B CN 104779511B CN 201410017325 A CN201410017325 A CN 201410017325A CN 104779511 B CN104779511 B CN 104779511B
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- brush
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- machine motor
- running machine
- additive
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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
-
- 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
Abstract
The invention discloses a kind of preparation method of running machine motor brush and the brush prepared by the method, the composition material of the brush for electromachine belongs to material science, the preparation method of brush is included first by graphite, carbon black, additive, binding agent, firming agent mix homogeneously in a heated condition, and be placed in mould after crushing, it is compressing, then carrying out cured, cutting, grinding, turn hole, add line to form, noise is low in use with brush for running machine motor prepared by the inventive method, resistance is low, commutation ability is good, strong antijamming capability and long service life, more importantly there is high-wearing feature, noise is low, grade of spark is low, no-spark when unloaded, product stability is good.
Description
Technical field
The present invention relates to brush for electromachine, more particularly 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 domestic running machine motor.
Background technology
Motor brush be the rotating machineries such as motor or electromotor standing part and rotating part between transmit energy or
The device of signal.Also known as carbon brush.Carbon brush is usually that pure carbon adds coagulator to make, and external form is usually square, is stuck on metal rack,
There is spring handle the inside it is pressed in rotating shaft, is to make sliding contact with movement parts and form a kind of conductive component for electrically connecting.Carbon
The rubber bar that the appearance of brush is somewhat like wiping pencil is such, has wire to draw on top.Volume varies.Carbon brush is a kind of for changing
To on device or slip ring, as the slide contact member for importing and exporting electric current, it is widely used in many electrical equipments.It
Conduction, heat conduction and greasy property are good, and the instinct with certain mechanical strength and commutation property spark.It is almost all of straight
Stream motor and commutating machine all use brush, and it is the important composition part of motor.
Brush can be divided into soft brush, middle hard brush and hard brush by the soft or hard of material；By the use object of brush
Steam turbine generator brush, steel mill electric machine brush, traction electric machine brush, automobile and tractor brush, electronic work can be divided into
Tool brush, aircrafts electric machinery electricity consumption etc.；It is divided into black electrical brush (being made with pure carbon graphite material) and colored electrodeposition by the color of brush
Brush (being made with the metal materials such as copper and graphite)；By the difference of brush material, can be divided into：（1）Electrographite brush.（2）Electrographite
Brush.（3）Metal-graphite brush.
Brush product material mainly has electrographite, soaks fat graphite, metal（Cupric, silver）Graphite.China's industry recommends mark
It is accurate《JB/T4003-2001 brush for electromachine》It is middle that brush is divided into four big class：Electrographite brush, electrographite brush, resin-bonding
Electrographite brush, metal-graphite brush.Brush is widely used in various double current generators, synchronous motor, storage battery direct current drive
Machine, crane motor collecting ring, various electric welding machine etc..With the development of science and technology, the species of motor and the operating mode bar for using
Part is more and more diversified so that have the brush of various different grades to meet these requirements, therefore the species of brush also with
The development of electric machine industry and it is more and more.People in order that with and managerial convenience, numerous brushes is classified.
In prior art, typically adopt carbon, graphite composite powder for base material, and with resin as adhesivess, Jing kneadings, pulverizing,
Manufacturing brush, the Chinese invention patent of such as Patent No. 200610052676 discloses a kind of electricity of motor for molding and solidification
Brush, the composition material of brush are formed by copper-plated compound powder particles and carbon fiber, outer layer carbon dust, outer layer binder calendering, wherein
Described compound powder particles consist of (weight portion)：Carbon dust 65-79, binding agent 0.5-10, alloying element 1.5-11；The plating
Copper for 10-35；Described carbon fiber is 0.3-0.9；Described outer layer carbon dust is 10-18；Described outer layer binder is
0.3-6；Binding agent therein is phenolic resin and the mixture of epoxy resin, and the wearability of the standby brush of the patent system is good, electric
Resistance rate is low.
And for example the patent of invention of Patent No. 97106640.X discloses a kind of brush for electromachine and preparation method thereof, the electricity
Electromechanical brush is made up of the graphite powder or carbon dust of copper facing or silver, carbonaceous powders or/and metal dust, binding agent, the graphite of copper facing or silver
The content of powder or carbon dust is 10-100%, and the mixed content of carbonaceous powders or metal dust or both is 0-90%, according to above-mentioned
Two kinds of contents, the content of binding agent is 0-20%.Manufacturing process is：First each component is mixed, is then suppressed, re-sintered,
Suppress again, finally carry out processing and forming.The brush for electromachine of the invention has in automobile, aviation, electric electromechanics trade
Very strong practical value.
Running machine motor alternating current generator because its small volume, rotating speed is high the characteristics of, by requiring that brush possesses commutation ability
Good, excellent anti-wear performance, long service life, environmental protection, it is anti-interference strong the advantages of；Further, since the commutation of running machine motor require it is severe
Carve, it is desirable to which the commutation of brush will be got well, suppress spark the features such as have high demands.However, general brush performance is poor, it is stable
Property it is bad, brush unit pressure is too high, and resistance is big, hardness is high, existing running machine motor with the universal noise of brush it is big, suppress spark
Ability, causes the abrasion of running machine motor brush to aggravate, and unit pressure is too small, contacts unstable, and commutation ability is poor, easily
There is mechanical spark.Particularly wear no resistance, commutation ability is poor, poor anti jamming capability, Chang Wufa meets motor to each of brush
Plant and require.
The content of the invention
The primary and foremost purpose of the present invention is to provide a kind of running machine motor brush for the problem that above-mentioned prior art is present
And preparation method thereof, the brush for electromachine resistivity of the present invention is low, wearability is good, commutation ability is good, strong antijamming capability and make
With life-span length, it is often more important that with high-wearing feature, noise is low, grade of spark is low, it is unloaded when no-spark, product stability is good.
To realize the purpose of the present invention, one aspect of the present invention provides a kind of preparation method of running machine motor brush, bag
Include
1）In a heated condition, raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent are mixed
Close uniform, premix material is obtained；
2）Raw material binding agent is mixed with solvent acetone, dissolving, mix homogeneously are obtained binder solution；
3）After premix material is mixed homogeneously with binder solution, place, brush raw mixture is obtained；
4）Drying and processing, break process are carried out successively to brush raw mixture, brush material mix powder shape is obtained；
5）Compression process is carried out to brush material mix powder, brush crude green body is obtained；
6）Brush crude green body is carried out into baking and curing process, brush blank is obtained；
7）Brush blank after cured is carried out cutting, is ground, turn hole, is added line and is obtained final product.
Wherein, step 1）, step 2）Described in raw material native graphite, Delanium, expanded graphite, carbon black, additive, solid
Agent, the weight of binding agent are：Native graphite 25-55, Delanium 30-70, expanded graphite 1-10, carbon black 5-15,
Additive 0.5-4.0, firming agent 0.5-3, binding agent 15-30.
Particularly, the weight of the raw material is preferably：Native graphite 30-50, Delanium 40-60, expansion stone
Black 3-5, carbon black 8-13, additive 1.5-3.5, firming agent 1-2, binding agent 20-28.
Especially, the granularity of the native graphite be 200-300 mesh, carbon content >=99%, ash≤1%；The artificial stone
Ink granularity be 200-300 mesh, carbon content >=99%, ash≤1%, moisture content≤1%；The granularity of the expanded graphite is 200-300
Mesh, carbon content >=99%, ash≤1%, moisture content≤1%；The granularity of the carbon black is 100-120 mesh.
Wherein, the additive selects molybdenum bisuphide and paraffin.Additive molybdenum bisuphide and paraffin have excellent friction
Performance, coefficient of friction are relatively low, and comprcssive strength is big.
Particularly, the weight of the molybdenum bisuphide and paraffin is 1：1-2.1, preferably 1：1.3-2.
Especially, the mean diameter of the additive be 200-300 mesh, preferably 200 mesh, molybdenum bisuphide has excellent
Frictional behaviour, coefficient of friction are relatively low, and comprcssive strength is big.
Especially, the melting point of paraffin wax is 52-60 DEG C.Paraffin has that intermiscibility is good, commutation ability is good, suppresses spark
Can be strong.
Wherein, the firming agent selects epoxy curing agent.
Particularly, the epoxy curing agent selects epoxy resin latent curing agent.
Especially, the epoxy resin lalent solidifying agent selects modified aliphatic amine, aromatic diamines dicyandiamide
Class, imidazoles organic acid anhydride, organic hydrazides class, lewis acid or microcapsule based epoxy resin latent curing agent.
Particularly, the epoxy resin lalent solidifying agent adipic dihydrazide and T-31 firming agent, preferably T-31 are solid
Agent.
Especially, the T-31 firming agent is a kind of phenolic aldehyde amine of performance synthesis (PAA) epoxy hardener, light brown clear
Viscous liquid, density (20 DEG C) 1.08～1.09g/cm＆sup3;.460～550mgKOH/g of amine number.Refractive index 1.5250～
1.5300.Flash-point（Open cup）75℃.Viscosity（25℃）1000～1300mPa.s.
Wherein, the binding agent selects epoxy resin, preferably phenolic resin, epoxy resin.
Particularly, the epoxy resin is diglycidyl ether type epoxy resin.
Especially, the epoxy resin is the bisphenol A type epoxy resin in glycidyl ether type epoxy resin.
Particularly, the epoxide number of the epoxy resin is 0.25-0.45.
Especially, the epoxy resin selects the (+)-2,3-Epoxy-1-propanol ethers by diphenol propane and epoxychloropropane polycondensation
Epoxy resin.
The native graphite of the present invention has light weight, conduction, heat conduction, the spy such as greasy property is good, machining property is excellent
Point, particularly from crystalline flake graphite, its mean diameter be 300 mesh, carbon content >=99%, ash≤1%；Delanium has wear-resisting
The features such as performance is good, consistent internal structure, degree of graphitization are high, ash is few, its mean diameter is 200 mesh, carbon content >=99%,
Ash≤1%, moisture content≤1%；The expanded graphite has that bulk density is little, makes to suppress fire when the close property of material system is good, the later stage is run
Flower, its mean diameter are 200 mesh, and carbon content >=99%, ash≤1%, moisture content≤1%, expanded graphite material is soft, wear-resistant, are strengthened
The anti-wear performance of brush, interference free performance and commutation ability, when contacting with diverter, spark is little；Epoxy resin of binder is in electricity
In brush preparation process, by hot setting, active group open chain link with the group in graphite and additive component in resin
Get up, various material structures are bonded together, make that material structure is finer and close, stable performance, play a part of adhesive.
Wherein, step 1）Described in heating condition temperature be 120-200 DEG C, preferably 150-170 DEG C；Heating makes raw material
The Impurity removal that middle moisture, ash grade, it is ensured that the moisture in raw material<0.5%.
Particularly, step 1）In by stirring by raw material mix homogeneously, mixing time is 1-2.5h, preferably 1.5-2h.
Especially, step 1）Also include for the material of mix homogeneously being cooled to less than 40 DEG C, it is standby.
Wherein, step 2）Described in the weight of binding agent and solvent acetone be 1：1.5-1.8, preferably 1：1.6-
1.75。
Particularly, step 3）In by stirring the premix material is mixed homogeneously with binder solution, mixing time is 1-
2.0h, preferably 1.0-1.5h.
Particularly, also include for the premix material of mix homogeneously placing at least 24h, solvent flashing acetone with binder solution.
Wherein, step 4）Described in drying and processing stabilize to 80-100 DEG C, preferably 85-95 DEG C；Drying time is 8-
12h；Granularity≤80 mesh of the brush material mix powder.
Wherein, step 5）Described in it is compressing during control brush crude green body bulk density be 1.62-1.66g/
cm3。
Wherein, step 6）Described in cured temperature be 180-200 DEG C；The cured time is 7-10h.
Particularly, the temperature of brush crude green body is warming up to into 160-180 DEG C in 5-6h first, then temperature be 160-
2-4h is kept at 180 DEG C.
Especially, heating rate be 20-32 DEG C/h, preferably 22.5-32 DEG C/h.
The running machine motor electricity consumption brushing tool of the present invention has the advantage that：
1st, in the preparation process of running machine motor brush of the invention, raw material addition is reasonable, adds resin as bonding
Agent, the brush for electromachine anti-wear performance of preparation is excellent, noise is low, long service life, environmental protection, anti-interference strong, and anti-wear performance improves 20%
More than, the brush of the present invention is low using the noise of process, noise as little as 60-67 decibels.
2nd, molybdenum bisuphide used in brush for electromachine of the invention, motor commutation performance are good, and stability is high, it is anti-interference it is strong with
And in various environment, properties of brush can be protected unaffected.
3rd, running machine motor of the invention expanded graphite, paraffin used in brush preparation, it is suppressed that brush uses process
In there is mechanical spark, grade of spark is low, and no-spark when unloaded, spark reduce at least one grade, extends making for brush
Use the time.
4th, the resistivity of running machine motor brush prepared by the inventive method is low, wearability is good, commutation ability is good, anti-dry
Disturb that ability is strong, long service life, can preferably meet various requirement of the electric tool motor to brush, applied range.
5th, the preparation method of brush for electromachine of the invention is simple, preparation process is simple, and product quality stablizing effect is obvious,
And it is easy to use.
6th, running machine motor prepared by the present invention is applied to high voltage with brush（180V）Treadmill is used, and is particularly suited for
China running machine motor is used.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
It is apparent.But these embodiments are only exemplary, do not constitute any restriction to the scope of the present invention.People in the art
Member is it should be understood that can enter to the details of technical solution of the present invention and form without departing from the spirit and scope of the invention
Row modification is replaced, but these modifications and replacement are each fallen within protection scope of the present invention.
The granularity of the native graphite used in the present invention be 200-300 mesh, carbon content >=99%, ash≤1%；It is described artificial
The granularity of graphite be 200-300 mesh, carbon content >=99%, ash≤1%, moisture content≤1%；The granularity of the expanded graphite is 200-
300 mesh, carbon content >=99%, ash≤1%, moisture content≤1%；The granularity of the carbon black is 100-120 mesh.
Embodiment 1
1st, get the raw materials ready according to following weight proportion（kg）：
Wherein, additive includes molybdenum bisuphide and paraffin, and molybdenum bisuphide is 1 with the weight proportion of paraffin：1.5；Binding agent
From bisphenol A type epoxy resin, its epoxide number is 0.25-0.45；The firming agent selects latent curing agent T-31 firming agent
（Changzhou mountain peak Chemical Co., Ltd.）；
2）Raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent are placed in kneading pot, are opened
The heater of kneading pot is opened, 150 DEG C are heated to, is stopped heating after mixing 2h at 150 DEG C, is treated that material is cooled to≤40
DEG C, premix material is obtained；
Heating makes moisture, the grey Impurity removal for grading in raw material, it is ensured that the moisture in raw material<0.5%.
3）The epoxy resin of binder of 28kg is dissolved in the acetone of 45kg, mix homogeneously, binder solution is obtained；
4）Binder solution is added to into stirring, mix homogeneously in premix material, 1.5h, extract after mix homogeneously is stirred
Material, in room temperature（20℃）Lower placement, acetone volatilization, places more than 24h, and brush raw mixture is obtained；
5）First brush raw mixture is placed in baking oven carries out drying and processing, removes acetone, is obtained without acetone
The temperature of raw mixture, wherein drying and processing is 100 DEG C, and the drying and processing time is 10h；Then the material after drying is carried out
Break process, broken material cross 80 mesh sieves, and brush material mix powder, brush material mix powder granularity≤80 are obtained
Mesh；
Drying further removes acetone solvent so that acetone volatilization is complete.
6）Brush material mix powder is placed in mould, compression process is carried out using hydraulic press, under 10MPa pressure
Compression molding, that is, be obtained running machine motor brush crude green body, wherein the bulk density of control running machine motor brush crude green body reaches
To 1.64-1.66g/cm3, stop compressing process；
7）Brush crude green body is placed in baking oven in 5h, oven temperature is had into room temperature（20℃）180 DEG C are increased to, wherein rising
Warm speed is 32 DEG C/h；Then 2h is kept in the case where temperature is for 180 DEG C, the brush blank after cured is obtained；
8）Brush blank after cured is carried out cutting, grinding machine, drilled, filled out line and obtain final product running machine motor brush.
According to JB/T8133.14-1999（Electric carbon product physical and chemical performance test method bulk density）Method determine
The bulk density of running machine motor brush；According to JB/T8133.2-1999（Electric carbon product physical and chemical performance test method electricity
Resistance rate）Method determines the resistivity of running machine motor brush；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
The results are shown in Table 1.
Embodiment 2
1st, get the raw materials ready according to following weight proportion（kg）：
Wherein, additive includes molybdenum bisuphide and paraffin, and molybdenum bisuphide is 0.5 with the weight proportion of paraffin：1；Binding agent
From bisphenol A type epoxy resin, its epoxide number is 0.25-0.35；The firming agent selects two acyl of latent curing agent adipic acid
Hydrazine（Wuxi City Liang Xi Fine Chemical Co., Ltd）.
2）Raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent are placed in kneading pot, are opened
Open the heater of kneading pot, be heated to 170 DEG C, after mixing 1.5h at 170 DEG C, stop heating, treat material be cooled to≤
40 DEG C, premix material is obtained；
3）The epoxy resin of binder of 20kg is dissolved in the acetone of 35kg, mix homogeneously, binder solution is obtained；
4）Binder solution is added to into stirring, mix homogeneously in premix material, 1h is stirred, after mix homogeneously, is taken out material,
In room temperature（35℃）Lower placement, acetone volatilization, places more than 24h, and brush raw mixture is obtained；
5）First brush raw mixture is placed in baking oven carries out drying and processing, removes acetone, is obtained without acetone
The temperature of raw mixture, wherein drying and processing is 90 DEG C, and the drying and processing time is 12h；Then the material after drying is carried out
Break process, broken material cross 80 mesh sieves, and brush material mix powder, brush material mix powder granularity≤80 are obtained
Mesh；
6）Brush material mix powder is placed in mould, compression process is carried out using hydraulic press, in 8.5MPa pressure
Lower compression molding, that is, be obtained running machine motor brush crude green body, wherein bulk density of the control running machine motor with brush crude green body
Reach 1.62-1.66g/cm3, stop compressing process；
7）Brush crude green body is placed in baking oven in 6h, by oven temperature by room temperature（35℃）170 DEG C are increased to, wherein rising
Warm speed is 22.5 DEG C/h；Then 3h is kept in the case where temperature is for 170 DEG C, the brush blank after cured is obtained；
8）Brush blank after cured is carried out cutting, grinding machine, drilled, filled out line and obtain final product running machine motor brush.
According to JB/T8133.14-1999（Electric carbon product physical and chemical performance test method bulk density）Method determine
The bulk density of running machine motor brush；According to JB/T8133.2-1999（Electric carbon product physical and chemical performance test method electricity
Resistance rate）Method determines the resistivity of running machine motor brush；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
The results are shown in Table 1.
Embodiment 3
1st, get the raw materials ready according to following weight proportion（kg）：
Wherein, additive includes molybdenum bisuphide and paraffin, and molybdenum bisuphide is 1.5 with the weight proportion of paraffin：2；Binding agent
From bisphenol A type epoxy resin, its epoxide number is 0.25-0.45；The firming agent selects epoxy resin latent curing agent T-
31 firming agent.
2）Raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent are placed in kneading pot, are opened
Open the heater of kneading pot, be heated to 160 DEG C, after mixing 1.5h at 160 DEG C, stop heating, treat material be cooled to≤
40 DEG C, premix material is obtained；
3）The epoxy resin of binder of 24kg is dissolved in the acetone of 40kg, mix homogeneously, binder solution is obtained；
4）Binder solution is added to into stirring, mix homogeneously in premix material, 1.5h, extract after mix homogeneously is stirred
Material, in room temperature（25℃）Lower placement, acetone volatilization, places more than 24h, and brush raw mixture is obtained；
5）First brush raw mixture is placed in baking oven carries out drying and processing, removes acetone, is obtained without acetone
The temperature of raw mixture, wherein drying and processing is 90 DEG C, and the drying and processing time is 8h；Then the material after drying is broken
80 mesh sieves are crossed in broken process, broken material, and brush material mix powder, brush material mix powder granularity≤80 mesh is obtained；
6）Brush material mix powder is placed in mould, compression process is carried out using hydraulic press, under 12MPa pressure
Compression molding, that is, be obtained running machine motor brush crude green body, wherein the bulk density of control running machine motor brush crude green body reaches
To 1.62-1.64g/cm3, stop compressing process；
7）Brush crude green body is placed in baking oven in 5.5h, by oven temperature by room temperature（25℃）160 DEG C are increased to, wherein
Heating rate is 24.5 DEG C/h；Then 4h is kept in the case where temperature is for 160 DEG C, the brush blank after cured is obtained；
8）Brush blank after cured is carried out cutting, grinding machine, drilled, filled out line and obtain final product running machine motor brush.
According to JB/T8133.14-1999（Electric carbon product physical and chemical performance test method bulk density）Method determine
The bulk density of running machine motor brush；According to JB/T8133.2-1999（Electric carbon product physical and chemical performance test method electricity
Resistance rate）Method determines the resistivity of running machine motor brush；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
The results are shown in Table 1.
Embodiment 4
1st, get the raw materials ready according to following weight proportion（kg）：
Wherein, additive includes molybdenum bisuphide and paraffin, and molybdenum bisuphide is 1.3 with the weight proportion of paraffin：2.7；Bonding
Bisphenol A type epoxy resin is selected in agent, and its epoxide number is 0.25-0.45；The firming agent is solidified from latent curing agent T-31
Agent；
2）Raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent are placed in kneading pot, are opened
The heater of kneading pot is opened, 200 DEG C are heated to, is stopped heating after mixing 1h at 200 DEG C, is treated that material is cooled to≤40
DEG C, premix material is obtained；
3）The epoxy resin of binder of 30kg is dissolved in the acetone of 45kg, mix homogeneously, binder solution is obtained；
4）Binder solution is added to into stirring, mix homogeneously in premix material, 2h is stirred, after mix homogeneously, is taken out material,
In room temperature（35℃）Lower placement, acetone volatilization, places more than 24h, and brush raw mixture is obtained；
5）First brush raw mixture is placed in baking oven carries out drying and processing, removes acetone, is obtained without acetone
The temperature of raw mixture, wherein drying and processing is 100 DEG C, and the drying and processing time is 8h；Then the material after drying is carried out
Break process, broken material cross 80 mesh sieves, and brush material mix powder, brush material mix powder granularity≤80 are obtained
Mesh；
6）Brush material mix powder is placed in mould, compression process is carried out using hydraulic press, under 10MPa pressure
Compression molding, that is, be obtained running machine motor brush crude green body, wherein the bulk density of control running machine motor brush crude green body reaches
To 1.62-1.66g/cm3, stop compressing process；
7）Brush crude green body is placed in baking oven in 6h, by oven temperature by room temperature（35℃）180 DEG C are increased to, wherein rising
Warm speed is 24.2 DEG C/h；Then 2h is kept in the case where temperature is for 180 DEG C, the brush blank after cured is obtained；
8）Brush blank after cured is carried out cutting, grinding machine, drilled, filled out line and obtain final product running machine motor brush.
According to JB/T8133.14-1999（Electric carbon product physical and chemical performance test method bulk density）Method determine
The bulk density of running machine motor brush；According to JB/T8133.2-1999（Electric carbon product physical and chemical performance test method electricity
Resistance rate）Method determines the resistivity of running machine motor brush；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
The results are shown in Table 1.
Embodiment 5
1st, get the raw materials ready according to following weight proportion（kg）：
Wherein, additive includes molybdenum bisuphide and paraffin, and molybdenum bisuphide is 0.25 with the weight proportion of paraffin：0.25；It is viscous
Bisphenol A type epoxy resin is selected in knot agent, and its epoxide number is 0.25-0.45；The firming agent is solidified from epoxy resin resting form
Agent T-31 firming agent；
2）Raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent are placed in kneading pot, are opened
Open the heater of kneading pot, be heated to 120 DEG C, after mixing 2.5h at 120 DEG C, stop heating, treat material be cooled to≤
40 DEG C, premix material is obtained；
3）The epoxy resin of binder of 15kg is dissolved in the acetone of 27kg, mix homogeneously, binder solution is obtained；
4）Binder solution is added to into stirring, mix homogeneously in premix material, 1h is stirred, after mix homogeneously, is taken out material,
In room temperature（30℃）Lower placement, acetone volatilization, places more than 24h, and brush raw mixture is obtained；
5）First brush raw mixture is placed in baking oven carries out drying and processing, removes acetone, is obtained without acetone
The temperature of raw mixture, wherein drying and processing is 80 DEG C, and the drying and processing time is 12h；Then the material after drying is carried out
Break process, broken material cross 80 mesh sieves, and brush material mix powder, brush material mix powder granularity≤80 are obtained
Mesh；
6）Brush material mix powder is placed in mould, compression process is carried out using hydraulic press, in 8.5MPa pressure
Lower compression molding, that is, be obtained running machine motor brush crude green body, wherein bulk density of the control running machine motor with brush crude green body
Reach 1.64-1.66g/cm3, stop compressing process；
7）Brush crude green body is placed in baking oven in 5h, by oven temperature by room temperature（30℃）160 DEG C are increased to, wherein rising
Warm speed is 26 DEG C/h；Then 3h is kept in the case where temperature is for 160 DEG C, the brush blank after cured is obtained；
8）Brush blank after cured is carried out cutting, grinding machine, drilled, filled out line and obtain final product running machine motor brush.
According to JB/T8133.14-1999（Electric carbon product physical and chemical performance test method bulk density）Method determine
The bulk density of running machine motor brush；According to JB/T8133.2-1999（Electric carbon product physical and chemical performance test method electricity
Resistance rate）Method determines the resistivity of running machine motor brush；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
The results are shown in Table 1.
Reference examples
With commercially available running machine motor（The auspicious energy in Putian, 180V）Brush is used as reference examples.
Method according to JB/T8133.14-1999 determines the density of running machine motor brush；According to JB/T8133.2-
1999 methods determine the resistivity of running machine motor brush；The Shore hardness of brush is determined using HS-19CTV type hardness testers machine,
The results are shown in Table 1.
The physical performance index of 1 brush of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Density g/cm3 | 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/
cm3；The hardness of running machine motor brush is low, and Shore hardness is 14-22；Resistance range is big, it is adaptable to high pressure（180V）Run
Electromechanical machine is used.And the hardness of existing running machine motor brush is high, noise is big, and Shore hardness reaches 25- more than 24
30, resistance range is little, only 1500-2300 Ω.
1 running machine motor of test example is tested with brush wear rate
Using motor for treadmill brush, control obtained in bulb load long duration test controller testing example 1-5
The wear rate of example running machine motor brush, result of the test are shown in Table 2.
The physical performance index of 2 brush of table
| 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 the brush for electromachine of the present invention is low, and wear rate is less than 1.6mm/100H, wear-resisting
Performance is good, and commutation ability is good, and noise is low.Compared with common running machine motor brush, abrasion resistance properties improve more than 27.3,
Reach 27.3-63.6%.
2 running machine motor of test example is with brush is high pressure resistant, grade of spark test
According to national standard《Electric rotating machine main technique requirements（GB/T755-2000）》Electricity obtained in testing example 1-5
High pressure resistant, the grade of spark of power driven tools motor brush, reference examples brush, result of the test are shown in Table 3.
The performance test results of 3 brush of table
From the test result of table 3：The grade of spark of the brush for electromachine of the present invention is low, is 11/4, with common treadmill
Brush for electromachine is compared, and grade of spark reduces 1 grade.
Test example 3 running machine motor brush noise test
Running machine motor brush obtained in noise test instrument testing example 1-5, right is used under conditions of motor idle running
The noise of running machine motor brush as usual, result of the test are shown in Table 4.
Noise performance index test during the use of 4 brush of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Noise decibel | 65 | 67 | 67 | 62 | 65 | 70 |
From the test result of table 4：
1st, running machine motor of the invention is low with noise during brush use, and noise decibel is less than 67, and noise decibel is only
For 62-67 decibels；
2nd, running machine motor brush of the present invention is used, noise is low in treadmill running, and user sense organ has been listened
Come it is comfortable, no high frequency sounds, also high noise to commutation in terms of damage, directly contact with commutator face, impact
The diverter life-span.
Claims (9)
1. the step of a kind of preparation method of running machine motor brush, including order below is carried out：
1）In a heated condition, will be raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent mixing equal
It is even, premix material is obtained；
2）Raw material binding agent is mixed with solvent acetone, dissolving, mix homogeneously are obtained binder solution；
3）After premix material is mixed homogeneously with binder solution, place, brush raw mixture is obtained；
4）Drying and processing, break process are carried out successively to brush raw mixture, brush material mix powder shape is obtained；
5）Compression process is carried out to brush material mix powder, brush crude green body is obtained；
6）Brush crude green body is carried out into cured, brush blank is obtained；
7）Brush blank after cured is carried out cutting, is ground, turn hole, is added line and is obtained final product；
Wherein, the raw material native graphite, Delanium, expanded graphite, carbon black, additive, firming agent, the weight portion of binding agent
Proportioning is：Native graphite 25-55, Delanium 30-70, expanded graphite 1-10, carbon black 5-15, additive 0.5-4.0, firming agent
0.5-3, binding agent 15-30.
2. preparation method as claimed in claim 1, is characterized in that the weight of the raw material is：Native graphite 30-50,
Delanium 40-60, expanded graphite 3-5, carbon black 8-13, additive 1.5-3.5, firming agent 1-2, binding agent 20-28.
3. preparation method as claimed in claim 2, is characterized in that the additive selects molybdenum bisuphide and paraffin.
4. preparation method as claimed in claim 3, is characterized in that the firming agent selects epoxy curing agent.
5. preparation method as claimed in claim 2 or claim 3, is characterized in that the binding agent selects epoxy resin or phenolic resin.
6. preparation method as claimed in claim 1, is characterized in that step 4）Described in drying and processing temperature be 80-100 DEG C.
7. preparation method as claimed in claim 1, is characterized in that step 5）During the compression process control brush
The bulk density of crude green body is 1.62-1.66 g/cm3。
8. preparation method as claimed in claim 1, is characterized in that step 6）Described in cured temperature be 160-180
℃。
9. a kind of running machine motor brush, is characterized in that being prepared from according to the arbitrary methods described of such as claim 1-8.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654796A (en) * | 2015-11-04 | 2017-05-10 | 苏州东翔碳素有限公司 | Treadmill motor electric brush preparation method |
| 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 |
| CN106654782A (en) * | 2015-11-04 | 2017-05-10 | 苏州东翔碳素有限公司 | Electric brush for treadmill motor |
| 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 |
| CN108512006B (en) * | 2017-02-24 | 2021-02-26 | 上海新池能源科技有限公司 | Copper-graphite-graphene electric 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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