CN107856540A - A kind of novel long-life trolleybus bow collector slide plate and preparation method thereof - Google Patents
A kind of novel long-life trolleybus bow collector slide plate and preparation method thereof Download PDFInfo
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- CN107856540A CN107856540A CN201711021829.XA CN201711021829A CN107856540A CN 107856540 A CN107856540 A CN 107856540A CN 201711021829 A CN201711021829 A CN 201711021829A CN 107856540 A CN107856540 A CN 107856540A
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- slide plate
- bow collector
- collector slide
- tio
- bow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
- B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
- B60L5/20—Details of contact bow
-
- 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
- C23C4/06—Metallic material
-
- 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
- C23C4/134—Plasma spraying
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The present invention relates to a kind of novel long-life trolleybus bow collector slide plate and preparation method thereof, the defects of according to present in existing trolleybus bow collector slide plate, a kind of trolleybus pantograph pan design preparation method is provided, i.e., prepares Cu Ti using plasma spraying method is in situ on slide plate matrixnO2n‑1Composite coating, to substitute existing carbon slipper.Based on weight/mass percentage composition, the coating composition is：Ti4O765 75%；Cu10 20%；TixO2x‑18 15%；TiO25 10%；Wherein 5≤x≤10.The present invention utilizes ceramic Ti in coating4O7High conductivity and wearability, and add metal phase Cu and improve by stream stability, bow collector slide plate is conductive, wear-resisting, decay resistance so as to effectively improving, and extends the service life of bow collector slide plate, has a good application prospect.
Description
Technical field
The present invention relates to trolleybus bow collector slide plate preparation field, and in particular to a kind of high performance and long service life trolleybus
Bow collector slide plate and preparation method thereof.
Background technology
Trolleybus is known as the title of " green public transport ", is a kind of car between tramcar and internal combustion engine bus
, it rolls into one all advantages of tramcar and internal combustion engine bus, and overcomes both vehicles
Shortcoming.Compared to tramcar, operationally caused noise will be less than the internal combustion engine of automobile to the traction motor of trolleybus,
Noise also very little caused by rubber tyre friction, accelerates and braking is steady, no pollution discharge, adds the comfort level of seating；Nothing
The Mechanical Reliability and energy efficiency of rail electric car are all higher, service life length, no idling energy loss, acceleration and climbing property
Can be good, power and maintenance cost are low, are additionally, since without using fuel and machine oil, trolleybus more clean hygiene, maintenance letter
It is single.Therefore, trolleybus is a kind of track vehicle of energy-conserving and environment-protective comfort and health, has good development prospect.
In trolleybus running, the main function of bow collector is transmission electric current, it requires bow collector material
Conductance will height；At the same time, because bow collector slide plate contacts in current course is transmitted with aerial condutor for sliding friction, remove
Normal abrasion are outer, also suffer from improper mechanical shock load and arc discharge ablation, abrasion and erosion to bow collector
It is more serious, therefore, also require that bow collector slide plate has excellent anti-attrition anti-wear performance and arc resistant ablation property.At present, nothing
The bow collector slide plate of rail electric car is mainly carbonaceous sliding block, its sliding contact stable performance, and arc resistance can be good, to radio and electricity
Depending on interference it is small.But many problems are remained in carbonaceous bow collector slide plate, it is mainly manifested in following aspect.(1) carbon is slided
The mechanical strength of plate is relatively low, and impact flexibility is relatively poor, in trolleybus running, the easy chip off-falling of bow collector slide plate and broken
Broken, service life is low, in use serious wear, easily occur it is local draw ditch, particularly in rainy season and humid area, by
Increase in frictional force, the probability that pantograph and catenary fault occurs is higher.(2) intrinsic resistance of carbonaceous material is big, and contact drop is higher, simultaneously
Due to the parameter fluctuation in production process, carbonaceous material performance is uneven, and the electric conductivity of bow collector is produced a very large impact.
(3) preparation of existing bow collector carbon slipper by raw material, it is necessary to mix, be cold-pressed and hot pressing, cure under pressure and high temperature graphitization
More Deng multiple working procedure, process flow steps, production process wastes time and energy, low production efficiency.(4) production cost of existing bow collector
It is higher, because the complexity of production technology is difficult, and the increase of material cost, make the cost of bow collector higher.
In order to overcome these problems, some researchers are improved bow collector slide plate from material angle, such as CN
1186030A discloses a kind of trolleybus carbon fiber reinforced carbon matrix composite by electric sliding block, using copper content as 20-80%
Copper facing carbon dust be matrix material, it is 1-25% short carbon fiber as reinforcing agent to use percentage by weight, using dosage as 5-
25% thermosetting resin is as binding agent.The sliding block has, mechanical performance small to the contact wire degree of wear and electric conductivity good
The characteristics of good.In addition, part researcher is improved the design of bow collector slide plate from structure, such as CN
204506573U discloses a kind of bow of two plate bow collector, so as to enable the bow of bow collector when rising with contacting
Net positive pole, negative pole reliable contacts, so as to meet being required by stream for trolleybus.
Above patent is improved bow collector slide plate from structure, material etc., but still using carbon-based material come
Prepare bow collector slide plate, can not fundamentally solve broken, the scaling-off problem of carbon slipper, the performance of bow collector slide plate need into
One step improves.At present, there is not yet having the method by preparing conductive wear-resisting composite coating both at home and abroad, to improve bow collector slide plate
The patent or document of performance.
The content of the invention
In view of problems of the prior art, the invention provides a kind of high performance and long service life trolleybus bow collector cunning
Plate and preparation method thereof, using plasma spraying method in bow collector slide plate matrix surface preparation Cu-Ti in situnO2n-1Composite coating
(4≤n≤10), utilize ceramic Ti4O7High conductivity and wearability, it is conductive, wear-resisting, corrosion-resistant to effectively improve bow collector slide plate
Performance, its service life is extended, while reduce production cost, had a good application prospect.
To use following technical scheme up to this purpose, the present invention：
In a first aspect, the invention provides a kind of trolleybus bow collector slide plate, the bow collector slide plate includes：Cu-
TinO2n-1Composite coating (1), bow collector slide plate matrix (2) and two plate bow collector slide plate chair (3)；The Cu-TinO2n-1It is compound
Coating (1) is coated on bow collector slide plate matrix (2) surface, and the bow collector slide plate matrix (2) is arranged on two plate by bolt
On bow collector slide plate chair (3), wherein 4≤n≤10.
According to the present invention, the Cu-TinO2n-14≤n≤10 in composite coating (1), for example, can be 4,5,6,7,8,9 or
Specific point value between 10, and above-mentioned numerical value, as space is limited and in concise consideration, the present invention no longer exclusive list.
According to the present invention, based on weight/mass percentage composition, the Cu-TinO2n-1Composite coating includes：Ti4O765-75%；
Cu 10-20%；TixO2x-18-15%；TiO25-10%；Wherein 5≤x≤10.
According to the present invention, based on weight/mass percentage composition, Ti in the composite coating4O7Content be 65-75%, such as can
To be between 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74% or 75%, and above-mentioned numerical value
Specific point value, as space is limited and the consideration for simplicity, the present invention no longer exclusive list.
According to the present invention, based on weight/mass percentage composition, Cu content is 10-20% in the composite coating, such as can be with
It is between 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20%, and above-mentioned numerical value
Specific point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, based on weight/mass percentage composition, Ti in the composite coatingxO2x-1Content be 8-15%, such as can
To be the specific point value between 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, and above-mentioned numerical value, it is limited to a piece
Width and the consideration for simplicity, the present invention no longer exclusive list.
According to the present invention, above-mentioned TixO2x-1In, x scope is 5≤x≤10, such as can be 5,6,7,8,9 or 10, with
And the specific point value between above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, based on weight/mass percentage composition, TiO in the composite coating2Content be 5-10%, such as can be with
It is the specific point value between 5%, 6%, 7%, 8%, 9% or 10%, and above-mentioned numerical value, examining as space is limited and for simplicity
Consider, the present invention no longer exclusive list.
According to the present invention, the bow collector slide plate matrix is monometallic matrix, preferably iron-based body.
Second aspect, the present invention provide a kind of preparation method of trolleybus bow collector slide plate as described in relation to the first aspect,
It the described method comprises the following steps：
(1) Cu-TiO of core shell structure is prepared2Composite granule；
(2) it is coated in bow collector slide plate matrix surface using plasma spray and prepares composite coating；
(3) the bow collector slide plate matrix with composite coating for obtaining step (2) is assemblied on bow collector slide plate chair.
In above-mentioned Plasma Spraying Process Using, the plasma of hydrogen and hydrogen meeting and TiO in plasma flame flow2In oxygen hair
Biochemical reaction seizes the oxygen in Ti-O keys (see formula 1,2), produces Lacking oxygen, makes TiO2Generation deoxidation, generation have Anoxic Phase
Sub- titanium oxide Ti4O7, so as to obtain the Ti of high content4O7, and then obtain composite coating in bow collector slide plate matrix surface.
TiO2+H2→Ti4O7+H2O (1)
TiO2+H+→Ti4O7+H2O (2)
The present invention prepares Cu-TiO from means commonly used in the art2Composite granule, spy is not done to its specific method
It is different to limit, as long as the Cu-TiO of core shell structure is prepared2Composite granule.As shown in Fig. 2 the Cu-TiO2Composite granule
Middle Cu is core, TiO2It is wrapped in around Cu, forms housing.Using the Cu-TiO of core shell structure2Composite granule, can as raw material
Cu is coated on inside powder, the contact area of Cu and air can be effectively reduced, suppress Cu oxidation；In addition, TiO2As shell
Body, can be with the H in plasma jet2Fully contact and deoxygenation occurs, so as to improve the transformation efficiency of sub- titanium oxide.
The present invention prepares the Cu-TiO of the core shell structure in step (1) using ultrasonic disperse and spray drying process2It is multiple
Close powder, but it is non-be only limitted to this, concrete operations are：
(a) based on weight/mass percentage composition, by 10-30% Cu powder and 70-90% TiO2Powder mixes, by gained mixed powder
End mixes with deionized water and binding agent, obtains mixed slurry；
(b) mixed slurry obtained by step (a) is subjected to ultrasonic disperse；
(c) slurry obtained by step (b) ultrasonic disperse is subjected to mist projection granulating, obtains the Cu-TiO of core shell structure2Composite powder
Body.
According to the present invention, based on weight/mass percentage composition, contain in step (a) mixed slurry：20-40% mixed powders
End；60-78% deionized waters；1-3% polyvinyl alcohol.
According to the present invention, the time of step (b) ultrasonic disperse is 2-5h, frequency 35-60Hz, temperature 40-60
℃。
The present invention is in order to reduce nano-TiO2The agglomeration of powder, select during step (b) ultrasonic disperse
Slurry gross weight 0.1-1% anionic polycarboxylate's salt electrolyte (SND6800) is added into mixed slurry.
Plasma spraying technology is that more universal technology is applied in this area, and the present invention is for the specific of plasma spraying equipment
Structure, mechanism etc. repeat no more, and only limit the key parameter being had an impact to the present invention.
The concrete operations of the step (2) are：By the Cu-TiO of core shell structure2Composite granule is transported to by powder feeder
Before the nozzle of plasma spray equipment, with Ar and H2For working gas, control voltage electric current, using the temperature of flame passes make etc. from
The plasma and hydrogen and TiO of hydrogen in sub- flame stream2In oxygen occur chemical reaction generation Ti4O7, it is ejected into bow collector slide plate base
Body surface forms composite coating behind face.
According to the present invention, the Cu-TiO2The powder feed rate of composite granule is 15-30g/min, such as can be 15g/
It is specific between min, 17g/min, 20g/min, 23g/min, 25g/min, 27g/min or 30g/min, and above-mentioned numerical value
Value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, H in the working gas2Content be Ar 20-30%, such as can be 20%, 21%,
22%th, the specific point value between 23%, 24%, 25%, 26%, 27%, 28%, 29% or 30%, and above-mentioned numerical value, is limited to
Length and the consideration for simplicity, the present invention no longer exclusive list.
For the present invention, H2Ratio must control within the above range, work as H2Ratio it is excessive when, can accelerate to spray
The ablation of mouth and negative electrode, reduce the life-span of spray gun, while H2Degree of ionization it is small, hot break is higher, and too high levels have potential safety hazard.
And work as H2Ratio it is too small when, then can reduce TiO2The efficiency of deoxygenation, reduce the generation of product Central Asia titanium oxide.
According to the present invention, the flow of the Ar is 120-140L/min, for example, can be 120L/min, 122L/min,
124L/min, 126L/min, 128L/min, 130L/min, 132L/min, 134L/min, 136L/min, 138L/min or
Specific point value between 140L/min, and above-mentioned numerical value, as space is limited and the consideration for simplicity, the present invention no longer limit arrange
Lift.
When Ar flow is too high, it is unfavorable for the heating of powder, powder fusing is uneven, and spray efficiency reduces, coating group
Knit loose, porosity increase.When Ar flow is too low, it can decline spray gun operating voltage, make flame stream weak and feeble, easily draw
Play nozzle erosion.
According to the present invention, the H2Flow be 30-40L/min, such as can be 30L/min, 31L/min, 32L/
Min, 33L/min, 34L/min, 35L/min, 36L/min, 37L/min, 38L/min, 39L/min or 40L/min, and it is above-mentioned
Specific point value between numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
Work as H2Flow it is too high or too low when, its consequence brought and above-mentioned H2Too high levels are too low similar, are unfavorable for
The preparation of composite coating, it should do the best in preparation process and avoid.
According to the present invention, voltage is 130-150V during the plasma spraying, for example, can be 130V, 132V, 134V,
Specific point value between 136V, 138V, 140V, 142V, 144V, 146V, 148V or 150V, and above-mentioned numerical value, as space is limited
And the consideration for simplicity, the present invention no longer exclusive list.
According to the present invention, electric current is 440-460A during the plasma spraying, for example, can be 440A, 443A, 445A,
Specific point value between 448A, 450A, 453A, 455A, 458A or 460A, and above-mentioned numerical value, as space is limited and for simplicity
Consideration, the present invention no longer exclusive list.
Above-mentioned voltage and current is the important parameter in preparation process, and the product of voltage and electric current is exactly spray power.When
When spray power is excessive, sprayed on material may be made to gasify and cause coating composition to change, devaporation can cause coating to bond
It is bad, it nozzle and electrode is aggravated ablation.When spray power is too small, then it can cause spraying particle underheat, coating
Adhesion strength, hardness and deposition efficiency all reduce.
According to the present invention, the distance of nozzle and bow collector slide plate matrix surface is 70-90mm during the plasma spraying, example
Such as can be specific between 70mm, 73mm, 75mm, 78mm, 80mm, 83mm, 85mm, 88mm or 90mm, and above-mentioned numerical value
Point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
When the hypertelorism of nozzle and bow collector slide plate matrix surface, the powder for having been heated to molten condition can be made cold
But, flying speed reduces, and influences the combination of coating and matrix, and spray efficiency reduces, coating porosity increase.Work as hypotelorism
When, powder heating can be caused insufficient, influence bond strength, while make substrate temperature too high, cause thermal deformation.
Present invention selection pre-processes before plasma spraying to bow collector slide plate matrix surface, and the pretreatment is：
Ultrasonic wave cleaning is carried out to bow collector slide plate matrix surface using acetone, to remove the pollutant of sled surface；Then to cleaning
Rear sled surface carries out sandblasting pretreatment, forms the rough surface of cleaning on the outer surface, strengthen the spraying particle of melting with
The mechanical bonding force of matrix surface, to improve the bond strength of coating.
The present invention, according to predetermined bow collector slide plate sectional dimension, is slided before step (3) described assembling to gained bow collector
The composite coating of plate surface carries out sanding and polishing, and the thickness of composite coating reduces 80-100 μm after sanding and polishing, is 300-320
μm；Then it is arranged on by bolt on two plate bow collector slide plate chair.
Compared with prior art, the present invention at least has the advantages that：
(1) present invention prepares composite coating, key component Ti on trolleybus bow collector slide plate matrix surface4O7,
Ti4O7For ceramic material, there is higher mechanical strength and excellent corrosion resistance, anti-wear performance is excellent, in bow collector slide plate work
Will not be crushed during work, chip off-falling the problems such as, the degree of wear is relatively small, improves the functional reliability of Pantograph-OCS system.
During use, composite coating preferential wear and corrosion, the service life and functional reliability of bow collector slide plate are extended.
(2) present invention prepares Cu-Ti using plasma spraying methodnO2n-1Composite coating (4≤n≤10), makes full use of ceramics
The anti-wear performance of phase and the self-lubricating property of soft metal phase, coating structure even compact, production process have repeatability, can protected
Demonstrate,proving the bow collector slide plate produced has good quality stability.Meanwhile Ti4O7High conductivity with metalloid, coating
Middle Ti4O7The electric conductivity of ceramics is nearly twice of graphite, and the resistivity of coating can greatly improve current collection between 4-8 μ Ω m
Bend the electric conductivity of slide plate, ensure that trolleybus by stream in order.
(3) the bow collector slide plate preparation method production technology that the present invention designs is simple and efficient, by Cu-TiO2Powder utilization etc.
Plasma spray method in situ prepare on metallic matrix is formed using cheap metal casting as matrix, high-performance abrasion-proof self-lubricating conduction
Cu-TinO2n-1Composite coating is the bow collector slide plate of working lining, and metal material, the heat conduction of spraying particle are mixed into spraying particle
Coefficient significantly increases, and is advantageous to the abundant fusing of particle, improves porosity defects, cohesive strength and the bond strength of coating.And
Metallic matrix can mass Foundry Production, spraying coating process can carry out spraying operation to multiple slide plate matrixes simultaneously, production efficiency is high,
High yield rate.
(4) present invention uses cheap metal as base material, Cu-TiO2Powder as spraying raw material, wherein, key component TiO2
Aboundresources, wide material sources, the cost of raw material are low.Slide plate matrix uses iron material, both ensure that the electric conductivity of bow collector slide plate, again
Reduce the use of copper material, reduce the consumption of energy resources, reduce cost of material.Meanwhile produce the plasma spray of use
Technical maturity is applied, production cost is low.
Brief description of the drawings
Fig. 1 is the structural representation of trolleybus bow collector slide plate prepared by the present invention, wherein, 1 is Cu-TinO2n-1It is compound
Coating, 2 be bow collector slide plate matrix, and 3 be two plate bow collector slide plate chair；
Fig. 2 is the Cu-TiO of core shell structure2The structural representation of composite granule；
Fig. 3 is the schematic diagram of bow collector slide plate matrix after plasma spraying in the embodiment of the present invention 1, wherein, 1 is Cu-
TinO2n-1Composite coating, 2 be bow collector slide plate matrix.
The present invention is described in more detail below.But following examples is only the simple example of the present invention, not generation
Table or limitation the scope of the present invention, protection scope of the present invention are defined by claims.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
For the present invention is better described, technical scheme is readily appreciated, of the invention is typical but non-limiting
Embodiment is as follows：
Embodiment 1
(1) Cu-TiO is prepared using ultrasonic disperse and spray drying process2Composite granule
1) based on weight/mass percentage composition, it is receiving for 60nm to take Cu powder that 15% average grain diameter is 15 μm and 85% average grain diameter
Rice TiO2Powder is doped mixing, obtains mixed-powder；
2) based on weight/mass percentage composition, 23% mixed-powder is taken respectively, and 74% deionized water and 3% binding agent PVA are mixed
It is stirred after conjunction, obtains mixed slurry；
3) mixed slurry obtained by step 2) is placed in ultrasonic reactor, it is frequency in 40Hz, continuous at a temperature of 55 DEG C
Ultrasonic disperse 5 hours, during ultrasonic disperse, the 0.9% dispersant SND 6800 for accounting for slurry gross weight is added in the slurry；
4) slurry obtained by step 3) ultrasonic disperse is subjected to mist projection granulating, choosing from LGZ-25 types centrifugal spray dryer
Spray drying parameters are as shown in table 1, and the Cu-TiO of core shell structure is obtained after mist projection granulating2Composite granule.
Table 1
| Temperature of inlet air | 230℃ | Slurry gives speed | 60g/min |
| Cavity air themperature | 151℃ | Atomization air flow | 12m3/h |
| Air exit temp | 130℃ | High-pressure air pressure | 0.4Mpa |
| Nozzle rotary speed | 13000r/min |
(2) it is coated in trolleybus bow collector slide plate matrix surface using plasma spray and prepares composite coating
1) carry out ultrasonic wave to bow collector slide plate matrix surface with acetone before spraying to clean, then to the slide plate table after cleaning
Face carries out blasting treatment；
2) by the Cu-TiO of the core shell structure of preparation2Composite granule is transported to the spray of plasma spraying equipment by powder feeder
Before mouth, powder feed rate 25g/min；With Ar and H2For working gas, H2Content be Ar 25%, control Ar gases flow
For 140L/min, H2The flow of gas is 35L/min；Regulation voltage is that voltage is 140V, electric current 450A, and spray distance is
80mm, powder is set to reach molten condition and be sprayed with high speed (average speed is more than 340m/s) using flame passes temperature
To bow collector slide plate matrix surface, composite coating is obtained on the surface, as shown in figure 3, coating is designed as streamlined, can be effective
Improve bow net under high-speed condition by fluidity energy.
(3) the bow collector slide plate matrix with composite coating is assembled on bow collector slide plate chair
According to predetermined bow collector slide plate sectional dimension, gained coating surface is subjected to sanding and polishing to providing roughness,
Polishing process coating thickness have dropped about 80-100 μm, and the coating layer thickness of final gained is 300-320 μm；Then coating is passed through
The bow collector slide plate matrix crossed after sanding and polishing processing is arranged on two plate bow collector slide plate chair by bolt, the knot after assembling
Structure is as shown in Figure 1.
Embodiment 2
(1) Cu-TiO is prepared using ultrasonic disperse and spray drying process2Composite granule
1) based on weight/mass percentage composition, it is receiving for 60nm to take Cu powder that 30% average grain diameter is 15 μm and 70% average grain diameter
Rice TiO2Powder is doped mixing, obtains mixed-powder；
2) based on weight/mass percentage composition, 25% mixed-powder is taken respectively, and 74% deionized water and 1% binding agent PVA are mixed
It is stirred after conjunction, obtains mixed slurry；
3) mixed slurry obtained by step 2) is placed in ultrasonic reactor, it is frequency in 45Hz, continuous at a temperature of 60 DEG C
Ultrasonic disperse 3.5 hours, during ultrasonic disperse, the 0.5% dispersant SND 6800 for accounting for slurry gross weight is added in the slurry；
4) slurry obtained by step 3) ultrasonic disperse is subjected to mist projection granulating, choosing from LGZ-25 types centrifugal spray dryer
Spray drying parameters obtain the Cu-TiO of core shell structure as shown in table 1 in embodiment 1, after mist projection granulating2Composite granule.
(2) it is coated in trolleybus bow collector slide plate matrix surface using plasma spray and prepares composite coating
1) carry out ultrasonic wave to bow collector slide plate matrix surface with acetone before spraying to clean, then the surface after cleaning is entered
Row blasting treatment；
2) by the Cu-TiO of the core shell structure of preparation2Composite granule is transported to the spray of plasma spraying equipment by powder feeder
Before mouth, powder feed rate 15g/min；With Ar and H2For working gas, H2Content be Ar 30%, control Ar gases flow
For 130L/min, H2The flow of gas is 39L/min；Regulation voltage is that voltage is 140V, electric current 450A, and spray distance is
70mm, powder is set to reach molten condition and be sprayed with high speed (average speed is more than 340m/s) using flame passes temperature
To bow collector slide plate matrix surface, composite coating is obtained on the surface.
(3) the bow collector slide plate matrix with composite coating is assembled on bow collector slide plate chair
According to predetermined bow collector slide plate sectional dimension, gained coating surface is subjected to sanding and polishing to providing roughness,
Polishing process coating thickness have dropped about 80-100 μm, and the coating layer thickness of final gained is 300-320 μm；Then by bow collector
Slide plate matrix is arranged on two plate bow collector slide plate chair by bolt.
Comparative example 1
(1) Cu-TiO is prepared2Composite granule；
1) based on weight/mass percentage composition, it is receiving for 60nm to take Cu powder that 15% average grain diameter is 15 μm and 85% average grain diameter
Rice TiO2Powder is doped mixing, obtains mixed-powder；
2) based on weight/mass percentage composition, 23% mixed-powder is taken respectively, and 74% deionized water and 3% binding agent PVA are mixed
It is stirred after conjunction, obtains mixed slurry；
3) slurry obtained by step 2) is subjected to mist projection granulating, the spraying of selection from LGZ-25 types centrifugal spray dryer
Drying parameter is as shown in table 1, and the Cu-TiO of non-core shell structure is obtained after mist projection granulating2Composite granule.
(2) with the step of embodiment 1 (2)；
(3) with the step of embodiment 1 (3).
By detection, find to contain more CuO, and Ti in gained coating4O7Content deficiency, and TiO2Content then
Excessively, it is impossible to obtain composite coating of the present invention.
Performance test
The trolleybus bow collector slide plate obtained with the embodiment of the present invention 1,2 and comparative example 1 and bow collector purchased in market are slided
Plate is sample, is usedMicro-moving frictional wear testing machine (German OPTIMOL companies production), is surveyed under the same conditions
Try the frictional behaviour of its coating.Using the shuttle friction type of ball disk, in atmospheric environment, tested under room temperature condition.
Wherein, magnitude of load 20N, frequency 20Hz, reciprocating stroke 1.5mm, time 60mim.Mating plate is chromium plating ball, diameter 10mm.
Its resistivity is tested using the conventional method in this area simultaneously, test result is as shown in table 2：
Table 2
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of trolleybus bow collector slide plate, it is characterised in that the bow collector slide plate includes：Cu-TinO2n-1Composite coating
(1), bow collector slide plate matrix (2) and two plate bow collector slide plate chair (3)；The Cu-TinO2n-1Composite coating (1) is coated on collection
Pantograph slider matrix (2) surface, the bow collector slide plate matrix (2) are arranged on two plate bow collector slide plate chair (3) by bolt
On, wherein 4≤n≤10.
2. bow collector slide plate as claimed in claim 1, it is characterised in that based on weight/mass percentage composition, the Cu-TinO2n-1It is multiple
Closing coating (1) includes：Ti4O765-75%；Cu 10-20%；TixO2x-18-15%；TiO25-10%；Wherein 5≤x≤10.
3. bow collector slide plate as claimed in claim 1, it is characterised in that the bow collector slide plate matrix is monometallic matrix；
Preferably, the bow collector slide plate matrix is iron.
4. the preparation method of the trolleybus bow collector slide plate as described in claim any one of 1-3, it is characterised in that the side
Method comprises the following steps：
(1) Cu-TiO of core shell structure is prepared2Composite granule；
(2) it is coated in bow collector slide plate matrix surface using plasma spray and prepares composite coating；
(3) the bow collector slide plate matrix with composite coating for obtaining step (2) is assemblied on bow collector slide plate chair.
5. method as claimed in claim 4, it is characterised in that prepared in step (1) using ultrasonic disperse and spray drying process
The Cu-TiO of the core shell structure2Composite granule, concrete operations are：
(a) based on weight/mass percentage composition, by 10-30% Cu powder and 70-90% TiO2Powder mix, by gained mixed-powder with
Deionized water and binding agent mix, and obtain mixed slurry；
(b) mixed slurry obtained by step (a) is subjected to ultrasonic disperse；
(c) slurry obtained by step (b) ultrasonic disperse is subjected to mist projection granulating, obtains the Cu-TiO of core shell structure2Composite granule.
6. method as claimed in claim 5, it is characterised in that based on weight/mass percentage composition, in step (a) mixed slurry
Contain：20-40% mixed-powders；60-78% deionized waters；1-3% polyvinyl alcohol；
Preferably, the time of step (b) ultrasonic disperse is 2-5h, and frequency 35-60Hz, temperature is 40-60 DEG C；
Preferably, added during step (b) ultrasonic disperse into mixed slurry slurry gross weight 0.1-1% it is cloudy from
Subtype polycarboxylate electrolyte.
7. method as claimed in claim 4, it is characterised in that the concrete operations of step (2) are：By the Cu-TiO of core shell structure2
Before composite granule is transported to the nozzle of plasma spraying equipment by powder feeder, with Ar and H2For working gas, control voltage electricity
Stream, makes the plasma of hydrogen and hydrogen and TiO in plasma flame flow using the temperature of flame passes2In oxygen chemically react
Generate Ti4O7, composite coating is formed after being ejected into bow collector slide plate matrix surface.
8. method as claimed in claim 7, it is characterised in that the Cu-TiO2The powder feed rate of composite granule is 15-30g/
min；
Preferably, H in the working gas2Content be Ar 20-30%；
Preferably, the flow of the Ar is 120-140L/min；
Preferably, the H2Flow be 30-40L/min；
Preferably, voltage is 130-150V, electric current 440-460A during the plasma spraying；
Preferably, the distance of nozzle and bow collector slide plate matrix surface is 70-90mm during the plasma spraying.
9. method as claimed in claim 4, it is characterised in that to bow collector slide plate base before step (2) described plasma spraying
Body surface face carries out ultrasonic wave cleaning, then carries out sandblasting pretreatment to the surface after cleaning；
Preferably, ultrasonic wave cleaning is carried out using acetone.
10. method as claimed in claim 4, it is characterised in that before step (3) described assembling, slided according to required bow collector
Plate sectional dimension, sanding and polishing is carried out to the composite coating of gained bow collector sled surface；
Preferably, composite coating thickness reduces 80-100 μm after the sanding and polishing；
Preferably, the thickness of composite coating is 300-320 μm after the sanding and polishing.
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| JPS62163501A (en) * | 1986-12-24 | 1987-07-20 | Furukawa Electric Co Ltd:The | Manufacture of collector for electric moving body |
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| CN105714235A (en) * | 2016-03-06 | 2016-06-29 | 中国人民解放军装甲兵工程学院 | TiO2-CNTs nano-composite powder for thermal spraying and preparing method for coating of TiO2-CNTs nano-composite powder |
| JP2017061411A (en) * | 2016-12-01 | 2017-03-30 | 株式会社日清製粉グループ本社 | Manufacturing method of nonstoichiometric oxide particle |
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| JPS62163501A (en) * | 1986-12-24 | 1987-07-20 | Furukawa Electric Co Ltd:The | Manufacture of collector for electric moving body |
| CN101044093A (en) * | 2004-06-01 | 2007-09-26 | 阿特拉沃达有限公司 | Reduced moisture chemical reactions |
| CN105714235A (en) * | 2016-03-06 | 2016-06-29 | 中国人民解放军装甲兵工程学院 | TiO2-CNTs nano-composite powder for thermal spraying and preparing method for coating of TiO2-CNTs nano-composite powder |
| JP2017061411A (en) * | 2016-12-01 | 2017-03-30 | 株式会社日清製粉グループ本社 | Manufacturing method of nonstoichiometric oxide particle |
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