CN107104338A - The frictional disk that a kind of earthing or grounding means is used - Google Patents
The frictional disk that a kind of earthing or grounding means is used Download PDFInfo
- Publication number
- CN107104338A CN107104338A CN201710354345.0A CN201710354345A CN107104338A CN 107104338 A CN107104338 A CN 107104338A CN 201710354345 A CN201710354345 A CN 201710354345A CN 107104338 A CN107104338 A CN 107104338A
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- CN
- China
- Prior art keywords
- frictional disk
- earthing
- disk body
- grounding means
- tungsten carbide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011248 coating agent Substances 0.000 claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 38
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 2
- 238000010286 high velocity air fuel Methods 0.000 claims 2
- 230000008021 deposition Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 21
- 239000002131 composite material Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 29
- 229910052799 carbon Inorganic materials 0.000 description 28
- 238000005299 abrasion Methods 0.000 description 15
- 238000002474 experimental method Methods 0.000 description 5
- 241000271559 Dromaiidae Species 0.000 description 4
- 238000006056 electrooxidation reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000003137 locomotive effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The present invention provides the frictional disk that a kind of earthing or grounding means is used, and belongs to high ferro motor-car technical field.Its structure includes blue or green frictional disk body made of copper, and frictional disk body, which is divided on rubbing surface and joint face, the rubbing surface, sets tungsten carbide coating.The present invention is on Copper base material surface with good conductivity, artificially set up a super abrasive, the surface of ultra-smooth, serve the effect of prior art middle friction tray composite surface material layer, breach the viewpoint for the requirement for possessing certain roughness to prior art middle friction tray surface requirements, this wearing composite material layer artificially set up, with fairly good wearability and electric conductivity, and thermal diffusivity, production domesticization for China's high ferro motor-car serves positive effect, reduces cost while adding the security of high ferro motor-car.
Description
Technical field
The present invention relates to high ferro motor-car technical field, more particularly, to the loop for high ferro motor-car electrical equipment and motor
The frictional disk that a kind of earthing or grounding means during connection is used.
Background technology
The high-tension electricity of 27.5kV needed for the operation of high ferro motor-car, by regional special supply network, contact net, EMUs equipment
The loop constituted with the part such as motor, rail is obtained after providing electric energy conversion, i.e. friction connects electric principle：The special supply network in area
Contact net is connected, electric energy is incorporated into electrical equipment and in-car input end of motor by the pantograph overlap joint contact net of train, motor
Output end is connected to the brush of earthing or grounding means on car, and frictional disk is contacted with brush spin friction, frictional disk connection axletree, wheel,
Rail, such rail connects and composes loop with supply network, and when circuit closed, the operating of electrical energy drive motor drives train operation.
In theory, if necessary to constitute the loop closed, the output end of motor can be directly connected to car body, i.e. electric current and pass through car
Bearing on body enters axletree, wheel, rail, but during such a connection, electric current can flow through bearing, cause bearing by galvano-cautery,
Cause valuable bearing premature breakdown.
Therefore the effect of the earthing or grounding means of high ferro motor-car is exactly that a short circuit loop is set up between the inside and outside circle of bearing,
Avoid electric current from being flowed between the inside and outside circle, rolling element of bearing, galvanic corrosion is produced to bearing, influence bearing life.
The content of the invention
For these problems of prior art, the present invention provides the frictional disk that a kind of earthing or grounding means is used, and it possesses antifriction
Wiping property and electric conductivity.
In order to achieve the above object, the present invention provides following technical scheme：
In order to improve the service life of frictional disk, decision uses Copper base material for main material, surface set up it is wear-resisting, conductive,
The technical scheme of artificial " oxide-film " of heat transfer.
Learn that traditional friction connects electric principle and is through research：Frictional disk, carbon brush in relative movement, by carbon brush into
Point, frictional disk composition, frictional disk surface roughness, carbon brush operating pressure, friction velocity, operating current, environment temperature, environmental wet
Under the collective effects of factor such as degree, an extremely thin composite layer is produced between frictional disk, carbon brush, this is combined at present
The chemical composition of material layer does not have certain standard, and physical size does not have certain standard, or even title also unite by neither one
One standard, has referred to as " oxide-film " for this " composite layer ", also has referred to as " epithelium ", industry differs,
Domain is differed, and address also differs, but the function engineers of this composite layer are unanimously approved, i.e. the composite layer
With higher " hardness " and preferably " surface roughness ", after the foundation of this composite layer, it can be effectively reduced and rub
Disk, the abrasion of carbon brush are wiped, when the composite layer state is good, frictional disk, the abrasion of carbon brush are possible to reach《Type approval test is big
Guiding principle》Requirement.But generation, holding due to the composite layer, are influenceed by many factors, therefore, the composite layer
Foundation is with keeping having larger randomness, i.e., in frictional disk, carbon brush friction circuit closer part occasion, such as generator is equally used
Friction circuit closer part, because operating mode is more stable, possibility that the composite layer is set up is big, the time that is keeping is long but right
In this application scenario changed at any time in operating modes such as environment temperature, humidity, speed of high ferro motor-car, the foundation of the composite layer
It is basically " living at the mercy of the elements " with holding, frictional disk, the abrasion of carbon brush are difficult stabilization, and test data shows, prior art
On the basis of produced by composite layer resistance it is larger, composite layer will be blocked up to cause contact resistance excessive, be sent out during high current
It is hot serious, it is impossible to meet acceptance criteria of the high ferro motor-car for earthing or grounding means caloric value.
The frictional disk that a kind of earthing or grounding means is used, including blue or green frictional disk body made of copper, frictional disk body are divided into rubbing surface
And joint face, tungsten carbide coating is set on the rubbing surface.
In above-mentioned technical proposal, the tungsten carbide coating thickness is 5-100 microns.
In above-mentioned technical proposal, the frictional disk body perimeter is provided with the fixation ear of through hole, and frictional disk body passes through
Fixed ear, which is inlayed, to be fixed on frictional disk inserts.
In above-mentioned technical proposal, the fixed ear is four, is evenly distributed on frictional disk body perimeter.
The present invention has compared with prior art to be beneficial in that：
(1) compared with prior art, the present invention on Copper base material surface with good conductivity, artificially set up a super abrasive,
The surface of ultra-smooth, serves the effect of prior art middle friction tray composite surface material layer.
(2) present invention breaches the viewpoint for the requirement for possessing certain roughness to prior art middle friction tray surface requirements,
This wearing composite material layer (oxide-film) artificially set up, it is right with fairly good wearability and electric conductivity, and thermal diffusivity
Positive effect is served in the production domesticization of China's high ferro motor-car, cost is reduced while adding the security of high ferro motor-car.
(3) electric current of locomotive car body receiving end is delivered on conductive termination, due to conductive termination and the conducting surface of electric conductor
It is brought into close contact, so the electric current of conductive termination is delivered on electric conductor, realizes the ground connection of locomotive car body.
(4) thicker tungsten carbide coating is conducive to improving the service life of frictional disk body rubbing surface, it might even be possible to realize
" lifelong " uses, and has saved the operating cost of locomotive.
(5) the small uneven formation " machine cut " that can be to carbon brush surface of the friction panel surface of traditional carbon brush, this
" friction surface " of the high-flatness artificially obtained in design has reached " minute surface " flatness, and microcosmic " machine cut " is reduced to
It is minimum.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the installation diagram of structure of the present invention.
Fig. 2 is the exploded view of structure of the present invention.
Wherein:1st, frictional disk body, 2, rubbing surface, 3, joint face, 4, through hole, 5, fixed ear, 6, spring column pin, 7, positioning
Hole
Embodiment
Below in conjunction with the accompanying drawing of the present invention, technical scheme is clearly and completely described, it is clear that institute
The embodiment of description is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, belongs to this hair
The scope of bright protection.
According to Fig. 1, the frictional disk used as a kind of earthing or grounding means shown in embodiment, including blue or green friction made of copper
Disk body, frictional disk body, which is divided on rubbing surface and joint face, rubbing surface, sets tungsten carbide coating, and tungsten carbide coating thickness is 5-
100 microns, on the rubbing surface that tungsten carbide is sprayed on to frictional disk body by HVAF technique, form 5-100 micro-
Rice tungsten carbide coating, embodiment uses 10 microns of tungsten carbide coating.
Frictional disk body perimeter sets four fixation ears for carrying through hole, and frictional disk body is inlayed by fixed ear to be fixed on
On frictional disk inserts, fixed ear is evenly distributed on frictional disk body perimeter.
Tungsten carbide coating is artificially to set up " oxide-film " on the rubbing surface of frictional disk body, this " oxidation artificially set up
Its attribute of film " has been different from " oxide-film " of traditional sense, belongs to " superhard coating ", although " superhard coating " is processed in machinery
Field is comparative maturity " surface peening " technology, is needing the occasion such as exceptional hardness, super abrasive, anticorrosive, " superhard coating "
It early there has been and be widely applied.Such as：Wear-resisting guide rail, bearing, roll, but be essentially confined to play for the application of " superhard coating "
Advantage in terms of its physics, chemistry, for the rare research of " superhard coating " electrical characteristic.
When researching and developing the present invention, comparative study " superhard coating " material of comparative maturity in the prior art, such as：1st, it is conductive
Ceramic-like is (such as：Tin ash, compound alundum (Al2O3) etc.).2nd, superhard metal is (such as：Tungsten, Jin Shu Molybdenum etc.) 3, carbide
(such as：Tungsten carbide, carborundum etc.) 4, new material (such as：Graphene, carbon fiber etc.).These materials all possess superhard, conductive spy
Property, but the problems such as consider the conductive capability of above-mentioned material, manufacturability, cost, reliability, the present invention finally employs " carbon
Change tungsten ".
Tungsten carbide coating mainly uses " spraying " construction technology in the present invention, in a variety of " spraying " techniques, is adopted through research
Sprayed with a kind of " HVAF " technique, and HVAF (High Velocity Oxy fuel, referred to as
HVOF it is) to do fuel using hydrogen, acetylene, propylene, kerosene etc., combustion adjuvant is made with oxygen, is fired in combustion chamber or special nozzle
Burn, produce and be up to 2000-3000 DEG C, the Supersonic quick burning flame of more than 2100m/s speed, while powder is sent into flame, produce
Fusing or the particle of semi-molten, high-speed impact deposit on matrix surface and form coating, and its coating is than common flame spraying or waits
Plasma spray bond strength is higher, finer and close.
For the selection of tungsten carbide coating thickness, 5-100 microns of scope is typically chosen in.
Because the hardness of tungsten carbide coating can reach HV1100 (hardness number), general material and its " to mill " are from mechanical layer
Face is said will not cause abrasion to it substantially, and especially hardness not high " carbon brush " is more difficult to damage it.Theoretically, one layer
Very thin " tungsten carbide " coating is almost " lifelong " with " carbon brush " " to mill " its life-span, but in real work, tungsten carbide is applied
Layer will not only bear " mechanical wear ", while still suffering from " galvano-cautery ".In high ferro motor-car, galvano-cautery is typically made by two reasons
Into：1st, " electric spark " corrodes, due to mechanical oscillation reason, and moment departs from frictional disk formation " the air gap " to carbon brush sometimes,
Spark discharge is likely to result under high voltage effect, local high temperature is possible to cause " coating " atomic small " point-like " to burn
Damage.Although few small " point-like " scaling loss of number of times does not result in influence, frequently small point-like scaling loss can be reduced really
The life-span of frictional disk " coating ".But what this phenomenon was showed for " earthing or grounding means " of high ferro motor-car does not protrude, it is former
Because being：It is multiple in the earthing or grounding means of motor-car, generally 3 carbon brush " parallel connection " use, these carbon brush depart from " friction simultaneously
Disk " is a minimum event of probability of happening, can not considered substantially；2nd, " electrochemical corrosion ".High ferro motor-car rubs when working
Disk, carbon brush are in contact with each other, because " current potential " of material in itself is different, it is possible to occur the transfer of electronics.Metal material loses electricity
Son is aoxidized, and makes material failure.During due to work by larger current between frictional disk, carbon brush, this electronics is determined
It is also possible to cause " electrochemical corrosion " to movement, but experiment is proved, and the harm that both " electrochemical corrosion " are brought is from " grand
See " see it is extremely slight；3rd, material contacting surface point (original) is acted in the migration of microcosmic point by electromagnetic force, gravitation etc., point
There may be certain " viscosity " between (original) son, so that cause in intimate contact with one another, generation Relative friction, motion, it is high-strength
The material of degree such as frictional disk may tear off some materials from low-intensity material, such as carbon brush, although the thing torn off every time
Quality is minimum, but for a long time, frequently tears and will also result in low-intensity material carbon brush and produce change in size, although one layer very thin
Tungsten carbide coating can meet and use, in terms of electrochemical corrosion angle, and there is the coating of frictional disk certain thickness to be necessary.
Thicker tungsten carbide coating is conducive to improving the service life of frictional disk body rubbing surface, it might even be possible to realize " eventually
Body " is used, but blocked up " coating " will bring larger " coating " resistance, raise contact voltage, high current by when send out
Heat is larger.Because tungsten carbide coating has had relatively high service life in itself, blocked up tungsten carbide coating and too high
Service life (so that substantially exceeding the service life of correlated parts) did not both meet " value engineering " while also result in valuable material
The waste of material.Test data shows that one 5-100 microns of tungsten carbide coating can meet a service life cycle substantially.
The leading indicator for weighing frictional disk is abrasion loss and the contact resistance-pressure drop of frictional disk.
Analysis of the tungsten carbide coating relative to the abrasion loss of carbon brush：
The main cause of carbon brush abrasion typically has two, and one is galvano-cautery, and two be pure " mechanical wear ", for carbon brush
Height abrasion contribution it is maximum be pure " mechanical wear ", the mechanical wear of so-called carbon brush exactly rubs from microcosmic panel surface
Small uneven " machine cut " to carbon brush surface, under conditions of other factors are not considered, high-flatness
" friction surface " is the effective means for reducing carbon brush abrasion.But in conventional friction circuit closer part, " the friction of this high-flatness
It but is to pass through in the frictional disk of tungsten carbide coating come what is realized that surface ", which is by long-term break-in self-assembling formation " oxide-film ",
High-precision attrition process is obtained, and " friction surface " of this high-flatness artificially obtained has reached " minute surface " flatness, will
Microcosmic " machine cut " minimizes.
Frictional disk is belonged to prior art, not repeated herein using bronze frictional disk processed,
The analysis of frictional disk abrasion loss：
According to《Chinese Industrial Standards (CIS) EMUs earthing or grounding means system type technical conditions》In earthing or grounding means, frictional disk coordinates with carbon brush to be carried
For reliable turning circuit and low abrasion are realized, in the normal operating conditions of frictional disk, frictional disk surface temperature must not exceed 120
Degree, the frictional disk life-span is not less than ten thousand kilometers of 240 (+24).
The frictional disk of embodiment is tested, the Tang's car share used according to motor-car《CRH380 EMUs technical specifications
Earthing or grounding means》3.2 service life clauses：Requirement on the abrasion loss of 380 type EMU frictional disks is every 1,000,000 kilometers
Abrasion loss be no more than 0.2mm.In the case of using conventional carbon brush, according to experiment, 240 carried out to the frictional disk of embodiment
In the experiment of 100,000 kilometers of hour, in obtained data, the abrasion of tungsten carbide surface are not present；And then for 2,400,000 kilometers
In experiment, in obtained data, the abrasion of tungsten carbide surface and 100,000 kilometers of comparison wear away unobvious, the wear-resisting amount of frictional disk
And the life-span meets the requirements.
Analysis of the tungsten carbide coating relative to brush contact resistance：
《Chinese Industrial Standards (CIS) EMUs earthing or grounding means system type technical conditions》Regulation, under static conditions, under 470A operating mode, connect
Resistance maximum of getting an electric shock is 5 ohm.In the 470A of progress experiment, Static Contact pressure drop is less than 0.5V, the numerical value of contact drop
Most of is that between 300mv-450mv, what is had is lower, and contact resistance index meets the requirements.The Static Contact resistance value of conversion
No more than 1 ohm.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.
Claims (4)
1. the frictional disk that a kind of earthing or grounding means is used, it is characterised in that including blue or green frictional disk body (1) made of copper, the friction
Disk body (1), which is divided on rubbing surface (2) and joint face (3), the rubbing surface, sets tungsten carbide coating, the tungsten carbide coating master
To be sprayed using HVAF technique, the HVAF is to utilize hydrogen, acetylene, propylene, kerosene etc.
Fuel is done, combustion adjuvant is made with oxygen, is burnt in combustion chamber or special nozzle, produces and is up to 2000-3000 DEG C, 2100m/s
The Supersonic quick burning flame of above speed, while powder is sent into flame, produces the particle of fusing or semi-molten, high-speed impact is in base
Deposition forms coating on body surface face；The tungsten carbide coating thickness is 5-100 microns.
2. the frictional disk that a kind of earthing or grounding means according to claim 1 is used, it is characterised in that：The frictional disk body
(1) there is joint face (3) on, the joint face (3) is that rubbing surface (2) is installed in circular groove, the joint face (3), described to rub
Wiping face (2) is cylinder, and frictional disk body (1) periphery is provided with the fixation ear (5) of through hole, the frictional disk body
(1) inlayed and be fixed on frictional disk inserts by fixed ear (5).
3. the frictional disk that a kind of earthing or grounding means according to claim 1 is used, it is characterised in that：On the rubbing surface (2)
Having in flexible pin (6) in positioning hole (7), the joint face (3), the spring column pin (6) has spring, and the spring is in
During free retracted position, the column cap of the spring column pin (6) is inserted into the positioning hole (7) of the rubbing surface (2).
4. the frictional disk that a kind of earthing or grounding means according to claim 1 is used, it is characterised in that institute described in claim 2
Fixed ear is stated for four, frictional disk body perimeter is evenly distributed on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354345.0A CN107104338A (en) | 2017-05-19 | 2017-05-19 | The frictional disk that a kind of earthing or grounding means is used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354345.0A CN107104338A (en) | 2017-05-19 | 2017-05-19 | The frictional disk that a kind of earthing or grounding means is used |
Publications (1)
| Publication Number | Publication Date |
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| CN107104338A true CN107104338A (en) | 2017-08-29 |
Family
ID=59670379
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710354345.0A Pending CN107104338A (en) | 2017-05-19 | 2017-05-19 | The frictional disk that a kind of earthing or grounding means is used |
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| CN (1) | CN107104338A (en) |
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| CN1342215A (en) * | 1999-02-11 | 2002-03-27 | 哈迪德有限公司 | Tungsten carbide coatings and method for producing the same |
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| US20110293849A1 (en) * | 2009-02-09 | 2011-12-01 | Daimler Ag | Method for producing a brake disc |
| CN103511491A (en) * | 2013-09-06 | 2014-01-15 | 徐州支点机电设备有限公司 | Friction disc of friction coupler |
| CN203813041U (en) * | 2014-03-12 | 2014-09-03 | 四川城际轨道交通材料有限责任公司 | Electric locomotive grounding device |
| CN204441684U (en) * | 2015-04-10 | 2015-07-01 | 四川城际轨道交通材料有限责任公司 | For the frictional disk of locomotive earthing device |
| CN204633101U (en) * | 2015-04-10 | 2015-09-09 | 四川城际轨道交通材料有限责任公司 | For the integrated brush box of locomotive earthing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342215A (en) * | 1999-02-11 | 2002-03-27 | 哈迪德有限公司 | Tungsten carbide coatings and method for producing the same |
| US20110293849A1 (en) * | 2009-02-09 | 2011-12-01 | Daimler Ag | Method for producing a brake disc |
| CN101717911A (en) * | 2009-12-18 | 2010-06-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for preparing high-density tungsten carbide wear-resistant coating |
| CN103511491A (en) * | 2013-09-06 | 2014-01-15 | 徐州支点机电设备有限公司 | Friction disc of friction coupler |
| CN203813041U (en) * | 2014-03-12 | 2014-09-03 | 四川城际轨道交通材料有限责任公司 | Electric locomotive grounding device |
| CN204441684U (en) * | 2015-04-10 | 2015-07-01 | 四川城际轨道交通材料有限责任公司 | For the frictional disk of locomotive earthing device |
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Application publication date: 20170829 |