CN107856540B - Trolley bus pantograph slide plate with long service life and preparation method thereof - Google Patents
Trolley bus pantograph slide plate with long service life and preparation method thereof Download PDFInfo
- Publication number
- CN107856540B CN107856540B CN201711021829.XA CN201711021829A CN107856540B CN 107856540 B CN107856540 B CN 107856540B CN 201711021829 A CN201711021829 A CN 201711021829A CN 107856540 B CN107856540 B CN 107856540B
- Authority
- CN
- China
- Prior art keywords
- slide plate
- pantograph
- tio
- pantograph slide
- powder
- 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.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The invention relates to a trolley bus pantograph slide plate with long service life and a preparation method thereof, and provides a design and preparation method of a trolley bus pantograph slide plate according to the defects of the existing trolley bus pantograph slide plate, namely a plasma spraying method is adopted to prepare Cu-Ti in situ on a slide plate substratenO2n‑1The composite coating is used for replacing the existing carbon sliding plate. The coating comprises the following components in percentage by mass: ti4O765‑75％；Cu10‑20％；TixO2x‑18‑15％；TiO25 to 10 percent; wherein x is more than or equal to 5 and less than or equal to 10. The invention utilizes ceramic Ti in the coating4O7The high conductivity and the wear resistance of the pantograph slide plate are improved, and the metal phase Cu is added to improve the current collection stability, so that the conductivity, the wear resistance and the corrosion resistance of the pantograph slide plate are effectively improved, the service life of the pantograph slide plate is prolonged, and the pantograph slide plate has a good application prospect.
Description
Technical Field
The invention relates to the field of preparation of trolley bus pantograph slide plates, in particular to a high-performance long-life trolley bus pantograph slide plate and a preparation method thereof.
Background
The trackless trolley bus is a kind of vehicle between the tramcar and the internal combustion engine bus, integrates all the advantages of the tramcar and the internal combustion engine bus, and overcomes the disadvantages of the two kinds of vehicles. Compared with a tramcar, the noise generated by the traction motor of the tramcar during operation is lower than that of an internal combustion engine of an automobile, the noise generated by the friction of rubber tires is very small, the acceleration and the braking are stable, the pollution emission is zero, and the riding comfort level is increased; the mechanical reliability and energy efficiency of the trolley bus are higher, the service life is long, no idling electric energy loss exists, the acceleration and climbing performance are good, the power and maintenance cost are low, and the trolley bus is cleaner and more sanitary and is simple to maintain because fuel and engine oil are not used. Therefore, the trolley bus is an energy-saving, environment-friendly, comfortable and sanitary rail vehicle and has a good development prospect.
In the running process of the trolley bus, the main function of the pantograph is to transmit current, so that the material of the pantograph is required to have high conductivity; meanwhile, the pantograph slide plate and the overhead conductor are in sliding friction contact in the current transmission process, so that the pantograph slide plate is subjected to abnormal mechanical impact load and arc discharge ablation besides normal abrasion, and the wear and erosion of the pantograph are serious, so that the pantograph slide plate is required to have excellent wear resistance and arc ablation resistance. At present, the pantograph slide plate of the trolley bus is mainly a carbon slide block, and has stable sliding contact performance, good arc resistance and small interference on radio and television. However, the carbon pantograph pan still has many problems, and is mainly expressed in the following points. (1) The carbon slide plate has the advantages of low mechanical strength, relatively poor impact toughness, easy block falling and crushing of the pantograph slide plate in the running process of a trolley bus, low service life, serious abrasion in the use process, easy occurrence of local ditch opening, and high probability of pantograph net failure due to increased friction especially in rainy seasons and humid areas. (2) The carbon material has large inherent resistance and higher contact pressure drop, and meanwhile, the performance of the carbon material is uneven due to parameter fluctuation in the production process, so that the electric conductivity of the pantograph is greatly influenced. (3) The existing pantograph carbon sliding plate needs to be prepared through multiple processes of raw material mixing, cold pressing, hot pressing, pressure curing, high-temperature graphitization and the like, the process flow has multiple steps, the production process is time-consuming and labor-consuming, and the production efficiency is low. (4) The existing pantograph has higher production cost, and the manufacturing cost of the pantograph is higher due to the complex and difficult production process and the increase of material cost.
In order to overcome these problems, some researchers have improved the pantograph pan from the material perspective, for example, CN1186030A discloses a carbon fiber reinforced carbon-based composite material pantograph pan for trackless trolley, which uses copper-plated carbon powder with copper content of 20-80% as a base material, uses short carbon fiber with weight percentage of 1-25% as a reinforcing agent, and uses thermosetting resin with dosage of 5-25% as a binder. The sliding block has the characteristics of small abrasion degree to the contact wire and good mechanical property and electrical conductivity. In addition, some researchers structurally improve the design scheme of the pantograph slide plate, for example, CN204506573U discloses a bow of a two-pole pantograph, so that the bow of the pantograph can reliably contact with the positive pole and the negative pole of a catenary when being lifted, thereby meeting the current collection requirement of the trolley bus.
Above patent has improved the pantograph slide from aspects such as structure, material, still adopts carbon-based material to prepare the pantograph slide, can't solve the breakage of carbon slide, fall the sediment problem fundamentally, and the performance of pantograph slide still needs further improvement. At present, no patent or literature for improving the performance of the pantograph slide plate by a method for preparing a conductive wear-resistant composite coating at home and abroad is seen.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a trolley bus pantograph slide plate with high performance and long service life and a preparation method thereof, wherein a plasma spraying method is adopted to prepare Cu-Ti on the surface of a pantograph slide plate substrate in situnO2n-1Composite coating (n is more than or equal to 4 and less than or equal to 10) by using ceramic Ti4O7High conductivity and wear resistance, effectively improvesThe pantograph slide plate has the advantages of electric conduction, wear resistance and corrosion resistance, the service life of the pantograph slide plate is prolonged, the production cost is reduced, and the pantograph slide plate has a good application prospect.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a trolley bus pantograph slide, comprising: Cu-TinO2n-1The composite coating (1), a pantograph slide plate substrate (2) and a bipolar pantograph slide plate seat (3); the Cu-TinO2n-1The composite coating (1) is coated on the surface of the pantograph slide plate base body (2), the pantograph slide plate base body (2) is installed on the two-pole pantograph slide plate base (3) through bolts, and n is more than or equal to 4 and less than or equal to 10.
According to the invention, the Cu-TinO2n-1The composite coating (1) has 4 ≦ n ≦ 10, which may be, for example, 4, 5, 6, 7, 8, 9, or 10, and the specific values therebetween, for space and for brevity, are not exhaustive.
According to the invention, the Cu-Ti is calculated according to the mass percentagenO2n-1The composite coating comprises: ti4O765-75％；Cu 10-20％；TixO2x-18-15％；TiO25 to 10 percent; wherein x is more than or equal to 5 and less than or equal to 10.
According to the invention, the composite coating contains Ti by mass percent4O7Is 65-75%, for example 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74% or 75%, and specific values therebetween, not to be construed as exhaustive or as a concise matter, and are not exhaustive.
According to the present invention, the Cu content in the composite coating layer is 10-20% by mass, for example, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20%, and the specific values between the above values are not exhaustive for reasons of space and simplicity.
According to the invention, the composite coating contains Ti by mass percentxO2x-1Is 8-15%, for example 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, and the specific values between the above values, are not exhaustive for reasons of space and simplicity.
According to the invention, the above TixO2x-1Where x is in the range of 5 ≦ x ≦ 10, such as 5, 6, 7, 8, 9, or 10, and the values between these are specific values, limited to space and for brevity, and are not exhaustive.
According to the invention, the TiO in the composite coating is calculated according to the mass percentage2Is 5-10%, for example 5%, 6%, 7%, 8%, 9% or 10%, and the specific values between the above values, are not exhaustive for reasons of space and brevity.
According to the invention, the base body of the pantograph slide plate is a single metal base body, preferably an iron base body.
In a second aspect, the present invention provides a method for manufacturing a trolley bus pantograph slide plate according to the first aspect, the method comprising the following steps:
(1) preparation of core-shell structured Cu-TiO2Composite powder;
(2) preparing a composite coating on the surface of a pantograph slide plate substrate by plasma spraying;
(3) and (3) assembling the pantograph slide plate base body with the composite coating obtained in the step (2) on a pantograph slide plate seat.
During the plasma spraying process, the plasma of hydrogen and the hydrogen gas in the plasma flame flow will react with the TiO2The oxygen in the solution is chemically reacted (see the formula 1,2), and oxygen in the Ti-O bond is abstracted to generate oxygen vacancy, so that the TiO is enabled to be2Deoxidation is carried out to generate titanium sub-oxide Ti with an oxygen-deficient phase4O7Thereby obtaining high content of Ti4O7And then a composite coating is obtained on the surface of the base body of the pantograph slide plate.
TiO2+H2→Ti4O7+H2O (1)
TiO2+H+→Ti4O7+H2O (2)
The method selects the means commonly used in the field to prepare Cu-TiO2The specific method of the composite powder is not particularly limited as long as the core-shell structure Cu-TiO is prepared2And (4) compounding the powder. As shown in FIG. 2, the Cu-TiO2Cu as core and TiO in composite powder2Wrapped around the Cu to form a housing. Cu-TiO with core-shell structure2The composite powder is used as a raw material, Cu can be coated in the powder, the contact area of the Cu and air can be effectively reduced, and the oxidation of the Cu is inhibited; furthermore, TiO2As a housing, can be associated with H in the plasma jet2Fully contacts and generates deoxidation reaction, thereby improving the conversion efficiency of the titanium suboxide.
In the step (1), the Cu-TiO with the core-shell structure is prepared by adopting ultrasonic dispersion and spray drying2The composite powder is not limited to the following, and the specific operations are as follows:
(a) according to the mass percentage, 10-30 percent of Cu powder and 70-90 percent of TiO are mixed2Mixing the powder, mixing the obtained mixed powder with deionized water and a binder, and stirring to obtain mixed slurry;
(b) carrying out ultrasonic dispersion on the mixed slurry obtained in the step (a);
(c) carrying out spray granulation on the slurry obtained by the ultrasonic dispersion in the step (b) to obtain Cu-TiO with a core-shell structure2And (3) composite powder.
According to the invention, the mixed slurry in the step (a) comprises the following components in percentage by mass: 20-40% of mixed powder; 60-78% deionized water; 1-3% polyvinyl alcohol.
According to the invention, the ultrasonic dispersion time of the step (b) is 2-5h, the frequency is 35-60Hz, and the temperature is 40-60 ℃.
The invention aims to reduce nano TiO2Agglomeration of the powder is selected by adding 0.1-1% by weight of an anionic polycarboxylate electrolyte (SND 6800) to the mixed slurry during the ultrasonic dispersion in step (b).
The plasma spraying technology is a technology which is applied more generally in the field, and the specific structure, mechanism and the like of the plasma spraying equipment are not described any more, and only the key parameters influencing the plasma spraying equipment are limited.
The specific operation of the step (2) is as follows: Cu-TiO of core-shell structure2Conveying the composite powder to the front of a nozzle of plasma spraying equipment by a powder feeder, and adding Ar and H2Controlling voltage and current for working gas, and making use of the temperature of plasma flame to make plasma of hydrogen and hydrogen gas and TiO in plasma flame flow2The oxygen in the solution is chemically reacted to produce Ti4O7And spraying the coating on the surface of the base body of the pantograph slide plate to form a composite coating.
According to the invention, the Cu-TiO2The powder feeding speed of the composite powder is 15-30g/min, for example, 15g/min, 17g/min, 20g/min, 23g/min, 25g/min, 27g/min or 30g/min, and the specific values between the above values are limited by space and for simplicity, and the invention is not exhaustive.
According to the invention, H is contained in the working gas2For example, 20% to 30% of Ar, for example, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29% or 30%, and the specific values therebetween, are not intended to be exhaustive for the sake of brevity and brevity.
For the purposes of the present invention, H2When the ratio of (A) to (B) is within the above range, H2When the ratio of (A) to (B) is too large, the erosion of the nozzle and the cathode is accelerated, the life of the spray gun is shortened, and H2The ionization degree of (2) is small, the thermal break is high, and the potential safety hazard exists in the too high content. When H is present2When the ratio of (A) to (B) is too small, TiO content decreases2The efficiency of the deoxidation reaction reduces the production of titanium sub-oxide in the product.
According to the present invention, the flow rate of Ar is 120-140L/min, such as 120L/min, 122L 0/min, 124L 1/min, 126L/min, 128L/min, 130L/min, 132L/min, 134L/min, 136L/min, 138L/min or 140L/min, and the specific point values therebetween are limited to space and for brevity, and the present invention is not exhaustive.
When the flow of Ar is too high, the powder is not beneficial to heating, the powder is not uniformly melted, the spraying efficiency is reduced, the coating structure is loose, and the porosity is increased. When the flow of Ar is too low, the working voltage of the spray gun is reduced, flame flow is weak, and nozzle ablation is easily caused.
According to the invention, said H2The flow rate of (2) is 30-40L/min, for example, 30L/min, 31L 0/min, 32L 1/min, 33L/min, 34L/min, 35L/min, 36L/min, 37L/min, 38L/min, 39L/min or 40L/min, and the specific values therebetween are not exhaustive and for the sake of brevity and simplicity, and the invention is not exhaustive.
When H is present2When the flow rate of (A) is too high or too low, the effect thereof is similar to that of the above-mentioned H2Too high or too low content is not beneficial to the preparation of the composite coating, and the preparation process should be avoided as much as possible.
According to the present invention, the voltage for plasma spraying is 130-150V, such as 130V, 132V, 134V, 136V, 138V, 140V, 142V, 144V, 146V, 148V or 150V, and the specific values therebetween are limited by space and for simplicity, and the present invention is not exhaustive.
According to the present invention, the plasma spraying current is 440-460A, such as 440A, 443A, 445A, 448A, 450A, 453A, 455A, 458A or 460A, and the specific values therebetween are not exhaustive for brevity and simplicity.
The voltage and the current are important parameters in the preparation process, and the product of the voltage and the current is the spraying power. When the spraying power is too high, it may vaporize the spray material and cause a change in the composition of the coating, and vapor condensation may cause poor adhesion of the coating and may also cause increased erosion of the nozzle and electrode. When the spraying power is too small, insufficient heating of the sprayed particles is caused, and the adhesive strength, hardness and deposition efficiency of the coating are reduced.
According to the invention, the distance between the nozzle and the surface of the pantograph pan base is 70-90mm, for example 70mm, 73mm, 75mm, 78mm, 80mm, 83mm, 85mm, 88mm or 90mm during plasma spraying, and the specific values between the above values, which are limited by space and for the sake of brevity, are not exhaustive.
When the distance between the nozzle and the surface of the base body of the pantograph slide plate is too far, the powder heated to a molten state is cooled, the flying speed is reduced, the combination of the coating and the base body is influenced, the spraying efficiency is reduced, and the porosity of the coating is increased. When the distance is too close, insufficient heating of the powder may be caused, which affects the bonding strength, and at the same time, the substrate temperature becomes too high, which causes thermal deformation.
The invention selects to carry out pretreatment on the surface of the base body of the pantograph slide plate before plasma spraying, wherein the pretreatment comprises the following steps: carrying out ultrasonic cleaning on the surface of a pantograph sliding plate substrate by using acetone so as to remove pollutants on the surface of the sliding plate; and then carrying out sand blasting pretreatment on the cleaned surface of the sliding plate to form a clean rough surface on the outer surface, and enhancing the mechanical bonding force of the fused spray particles and the surface of the substrate so as to improve the bonding strength of the coating.
Before the assembly in the step (3), the composite coating on the surface of the pantograph slide plate is polished according to the preset cross-sectional dimension of the pantograph slide plate, and the thickness of the composite coating after polishing is reduced by 80-100 μm and is 320 μm; and then is installed on the two-pole type pantograph slide plate seat through bolts.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the invention prepares a composite coating on the surface of a trolley bus pantograph slide plate substrate, and the main component of the composite coating is Ti4O7，Ti4O7The pantograph pan is made of ceramic materials, has high mechanical strength, excellent corrosion resistance and excellent wear resistance, does not have the problems of crushing, block falling and the like in the working process of the pantograph pan, has relatively small wear degree, and improves the working reliability of a pantograph system. In the use process, the composite coating is preferentially worn and corroded, so that the service life and the working reliability of the pantograph slide plate are prolonged.
(2) The invention adopts a plasma spraying method to prepare Cu-TinO2n-1The composite coating (n is more than or equal to 4 and less than or equal to 10) makes full use of the wear resistance of the ceramic phase and the soft metalThe self-lubricating performance of the phase, the uniform and compact coating structure and the repeatability of the production process can be ensured, and the produced pantograph slide plate has good quality stability. At the same time, Ti4O7Having high conductivity of the metalloid, Ti in the coating4O7The conductivity of the ceramic is nearly twice that of graphite, the resistivity of the coating is between 4 and 8 mu omega.m, the conductivity of the pantograph slide plate can be greatly improved, and the good current receiving condition of the trolley bus is ensured.
(3) The preparation method of the pantograph slide plate designed by the invention has simple and rapid production process, and the Cu-TiO alloy is prepared by2The powder is prepared in situ on a metal matrix by a plasma spraying method to form high-performance wear-resistant self-lubricating conductive Cu-Ti by taking a cheap metal casting as the matrixnO2n-1The composite coating is a pantograph slide plate of a working layer, metal materials are mixed in the sprayed particles, the heat conductivity coefficient of the sprayed particles is obviously increased, the particles are fully melted, and the pore defect, the cohesive strength and the bonding strength of the coating are improved. And the metal matrix can be cast and produced in batches, the spraying process can be used for spraying a plurality of sliding plate matrixes simultaneously, the production efficiency is high, and the yield is high.
(4) The invention adopts cheap metal as a base material, Cu-TiO2The powder is used as spraying raw material, wherein the main component of the powder is TiO2Rich resources, wide sources and low cost of raw materials. The slide base member adopts the iron material, has both guaranteed the electric conductivity of collection bow slide, has reduced the use of copper product again, has reduced the consumption of energy resource, has reduced material cost. Meanwhile, the plasma spraying process adopted by the production is mature, and the production cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a trolley bus pantograph pan prepared by the invention, wherein 1 is Cu-TinO2n-1The composite coating, 2 is the base body of the pantograph slide plate, 3 is the slide plate seat of the bipolar pantograph;
FIG. 2 is Cu-TiO with core-shell structure2A schematic structural diagram of the composite powder;
FIG. 3 is a schematic view of a base body of a pantograph pan after plasma spraying according to embodiment 1 of the present invention, wherein 1Is Cu-TinO2n-1And 2, a composite coating layer is used as a base body of the pantograph slide plate.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
(1) Preparation of Cu-TiO by ultrasonic dispersion and spray drying method2Composite powder
1) Taking 15 percent of Cu powder with the average grain diameter of 15 mu m and 85 percent of nano TiO with the average grain diameter of 60nm according to the mass percentage2Mixing the powder to obtain mixed powder;
2) respectively mixing 23% of mixed powder, 74% of deionized water and 3% of adhesive PVA according to the mass percentage, and then stirring to obtain mixed slurry;
3) placing the mixed slurry obtained in the step 2) into an ultrasonic reactor, continuously performing ultrasonic dispersion for 5 hours at the frequency of 40Hz and the temperature of 55 ℃, and adding a dispersing agent SND 6800 accounting for 0.9 percent of the total weight of the slurry into the slurry in the ultrasonic dispersion process;
4) selecting an L GZ-25 centrifugal spray dryer to spray and granulate the slurry obtained by the ultrasonic dispersion in the step 3), wherein the selected spray drying parameters are shown in table 1, and obtaining the Cu-TiO with the core-shell structure after spray granulation2And (3) composite powder.
TABLE 1
| Air inlet temperature | 230℃ | Slurry feed rate | 60g/min |
| Air temperature of the chamber | 151℃ | Atomized air flow | 12m3/h |
| Air outlet temperature | 130℃ | High pressure air pressure | 0.4Mpa |
| Rotational speed of nozzle | 13000r/min |
(2) Composite coating prepared on surface of trolley bus pantograph slide plate substrate by plasma spraying
1) Before spraying, acetone is used for carrying out ultrasonic cleaning on the surface of a pantograph sliding plate matrix, and then sand blasting is carried out on the cleaned surface of the sliding plate;
2) preparing Cu-TiO with a core-shell structure2Conveying the composite powder to the front of a nozzle of plasma spraying equipment by a powder feeder, wherein the powder feeding speed is 25 g/min; with Ar and H2As a working gas, H2The content of Ar is 25 percent, the flow rate of Ar gas is controlled to be 140L/min, H2The flow rate of the gas is 35L/min, the voltage is adjusted to 140V, the current is 450A, the spraying distance is 80mm, and the spraying device is utilizedThe plasma flame temperature enables the powder to reach a molten state and be sprayed onto the surface of the base body of the pantograph slide plate at an extremely high speed (the average speed exceeds 340m/s), and a composite coating is obtained on the surface, as shown in figure 3, the coating is designed to be streamline, so that the current collection performance of the pantograph-catenary under a high-speed condition can be effectively improved.
(3) Assembling a pantograph slide plate base body with a composite coating on a pantograph slide plate seat
According to the preset cross section size of the pantograph slide plate, grinding and polishing the surface of the obtained coating to a specified roughness, wherein the thickness of the coating is reduced by about 80-100 mu m in the polishing process, and the thickness of the finally obtained coating is 300-320 mu m; then, the pantograph slide plate base body after the coating is subjected to grinding and polishing treatment is installed on the two-pole type pantograph slide plate seat through bolts, and the assembled structure is shown in fig. 1.
Example 2
(1) Preparation of Cu-TiO by ultrasonic dispersion and spray drying method2Composite powder
1) According to the mass percentage, 30 percent of Cu powder with the average grain diameter of 15 mu m and 70 percent of nano TiO with the average grain diameter of 60nm are taken2Mixing the powder to obtain mixed powder;
2) respectively mixing 25% of mixed powder, 74% of deionized water and 1% of adhesive PVA according to the mass percentage, and stirring to obtain mixed slurry;
3) placing the mixed slurry obtained in the step 2) into an ultrasonic reactor, continuously performing ultrasonic dispersion for 3.5 hours at the frequency of 45Hz and the temperature of 60 ℃, and adding a dispersing agent SND 6800 accounting for 0.5 percent of the total weight of the slurry into the slurry in the ultrasonic dispersion process;
4) selecting an L GZ-25 centrifugal spray dryer to spray and granulate the slurry obtained by the ultrasonic dispersion in the step 3), wherein the selected spray drying parameters are shown in table 1 in example 1, and obtaining the Cu-TiO with the core-shell structure after spray granulation2And (3) composite powder.
(2) Composite coating prepared on surface of trolley bus pantograph slide plate substrate by plasma spraying
1) Before spraying, acetone is used for carrying out ultrasonic cleaning on the surface of a pantograph sliding plate matrix, and then sand blasting is carried out on the cleaned surface;
2) preparing Cu-TiO with a core-shell structure2Conveying the composite powder to the front of a nozzle of plasma spraying equipment by a powder feeder, wherein the powder feeding speed is 15 g/min; with Ar and H2As a working gas, H2The content of Ar is 30 percent, the flow rate of Ar gas is controlled to be 130L/min, H2The flow rate of the gas is 39L/min, the voltage is adjusted to be 140V, the current is 450A, the spraying distance is 70mm, the plasma flame temperature is utilized to enable the powder to reach a molten state, the powder is sprayed onto the surface of the base body of the pantograph slide plate at an extremely high speed (the average speed exceeds 340m/s), and the composite coating is obtained on the surface.
(3) Assembling a pantograph slide plate base body with a composite coating on a pantograph slide plate seat
According to the preset cross section size of the pantograph slide plate, grinding and polishing the surface of the obtained coating to a specified roughness, wherein the thickness of the coating is reduced by about 80-100 mu m in the polishing process, and the thickness of the finally obtained coating is 300-320 mu m; and then the base body of the pantograph slide plate is arranged on the two-pole type pantograph slide plate seat through bolts.
Comparative example 1
(1) Preparation of Cu-TiO2Composite powder;
1) taking 15 percent of Cu powder with the average grain diameter of 15 mu m and 85 percent of nano TiO with the average grain diameter of 60nm according to the mass percentage2Mixing the powder to obtain mixed powder;
2) respectively mixing 23% of mixed powder, 74% of deionized water and 3% of adhesive PVA according to the mass percentage, and then stirring to obtain mixed slurry;
3) selecting an L GZ-25 centrifugal spray dryer to carry out spray granulation on the slurry obtained in the step 2), wherein the selected spray drying parameters are shown in table 1, and obtaining the Cu-TiO with the non-core-shell structure after spray granulation2And (3) composite powder.
(2) Same as example 1, step (2);
(3) same as example 1, step (3).
Through detection, the obtained coating contains more CuO and Ti4O7Is insufficient, and TiO2Too much content of (b) makes it impossible to obtain the composite coating of the present invention.
Performance testing
The trolley bus pantograph slide plates obtained in the embodiments 1 and 2 and the comparative example 1 of the invention and the commercial pantograph slide plates are taken as samples, and the method adopts
The coating was tested for frictional properties under the same conditions using a ball-and-disc reciprocating type friction model in an atmospheric environment at room temperature, wherein the load was 20N, the frequency was 20Hz, the reciprocating stroke was 1.5mm, the time was 60 mm, and the mating member was a chrome-plated ball having a diameter of 10 mm.
The resistivity was also tested by methods conventional in the art, and the test results are shown in table 2:
TABLE 2
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (19)
1. The utility model provides a trolley bus collector bow slide which characterized in that, the collector bow slide includes: Cu-TinO2n-1The composite coating (1), a pantograph slide plate substrate (2) and a bipolar pantograph slide plate seat (3); the Cu-TinO2n-1The composite coating (1) is coated on the surface of the pantograph slide plate base body (2), the pantograph slide plate base body (2) is installed on the two-pole pantograph slide plate seat (3) through bolts, wherein n is more than or equal to 4 and less than or equal to 10;
according to the mass percentage, the Cu-TinO2n-1The composite coating (1) comprises: ti4O765-75％；Cu 10-20％；TixO2x-18-15％；TiO25 to 10 percent; wherein x is more than or equal to 5 and less than or equal to 10;
in the preparation process, the Cu-TiO with a core-shell structure2The composite powder is used as raw material, and hydrogen in plasma spraying jet flow and TiO in the composite powder are utilized2Reacting to obtain Cu-Ti on the surface of the base body of the pantograph slide platenO2n-1A composite coating (1).
2. The pantograph slider of claim 1, wherein the pantograph slider base is a single metal base.
3. The pantograph slider of claim 2, wherein said pantograph slider body is iron.
4. A method for manufacturing a trolley bus pantograph slide as claimed in any one of claims 1-3, characterized in that said method comprises the steps of:
(1) preparation of core-shell structured Cu-TiO2Composite powder;
(2) preparing a composite coating on the surface of a pantograph slide plate substrate by plasma spraying;
(3) and (3) assembling the pantograph slide plate base body with the composite coating obtained in the step (2) on a pantograph slide plate seat.
5. The preparation method of claim 4, wherein the Cu-TiO core-shell structure prepared in step (1) by ultrasonic dispersion and spray drying is used for preparing the Cu-TiO core-shell structure2The composite powder comprises the following specific operations:
(a) according to the mass percentage, 10-30 percent of Cu powder and 70-90 percent of TiO are mixed2Mixing the powder, mixing the obtained mixed powder with deionized water and a binder, and stirring to obtain mixed slurry;
(b) carrying out ultrasonic dispersion on the mixed slurry obtained in the step (a);
(c) carrying out spray granulation on the slurry obtained by the ultrasonic dispersion in the step (b) to obtain Cu-TiO with a core-shell structure2And (3) composite powder.
6. The method according to claim 5, wherein the mixed slurry of step (a) comprises, in terms of mass percent: 20-40% of mixed powder; 60-78% deionized water; 1-3% polyvinyl alcohol.
7. The method of claim 5, wherein the ultrasonic dispersion of step (b) is carried out for a period of 2-5 hours at a frequency of 35-60Hz and at a temperature of 40-60 ℃.
8. The method of claim 5, wherein the anionic polycarboxylate electrolyte is added to the mixed slurry in an amount of 0.1 to 1% by weight based on the total weight of the slurry during the ultrasonic dispersion in the step (b).
9. The preparation method according to claim 4, wherein the specific operation of the step (2) is: Cu-TiO of core-shell structure2Conveying the composite powder to the front of a nozzle of plasma spraying equipment by a powder feeder, and adding Ar and H2Controlling voltage and current for working gas, and making use of the temperature of plasma flame to make plasma of hydrogen and hydrogen gas and TiO in plasma flame flow2The oxygen in the solution is chemically reacted to produce Ti4O7And spraying the coating on the surface of the base body of the pantograph slide plate to form a composite coating.
10. The method of claim 9, wherein the Cu-TiO is2The powder feeding speed of the composite powder is 15-30 g/min.
11. The method of claim 9, wherein the working gas is H2The content of (A) is 20-30% of Ar.
12. The method as claimed in claim 9, wherein the flow rate of Ar is 120-140L/min.
13. The method of claim 9, wherein H is2The flow rate of (A) is 30-40L/min.
14. The method as claimed in claim 9, wherein the voltage is 130-150V and the current is 440-460A during the plasma spraying.
15. The method according to claim 9, wherein the distance between the nozzle and the surface of the base of the pantograph pan is 70 to 90 mm.
16. The method according to claim 4, wherein the surface of the base of the pantograph pan is subjected to ultrasonic cleaning before the plasma spraying in the step (2), and then the cleaned surface is subjected to a sand blasting pretreatment.
17. The method of claim 16, wherein the ultrasonic cleaning is performed using acetone.
18. The method according to claim 4, wherein before the assembling in step (3), the composite coating on the surface of the pantograph pan is polished according to the required cross-sectional dimension of the pantograph pan.
19. The method as claimed in claim 18, wherein the thickness of the composite coating after grinding and polishing is reduced by 80-100 μm, and the thickness of the composite coating after grinding and polishing is 300-320 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021829.XA CN107856540B (en) | 2017-10-27 | 2017-10-27 | Trolley bus pantograph slide plate with long service life and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021829.XA CN107856540B (en) | 2017-10-27 | 2017-10-27 | Trolley bus pantograph slide plate with long service life and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107856540A CN107856540A (en) | 2018-03-30 |
| CN107856540B true CN107856540B (en) | 2020-08-04 |
Family
ID=61696918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021829.XA Active CN107856540B (en) | 2017-10-27 | 2017-10-27 | Trolley bus pantograph slide plate with long service life and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107856540B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106735176A (en) * | 2017-01-18 | 2017-05-31 | 成都锦钛精工科技有限公司 | Sub- titanium oxide metal composite is spherical or spherical powder and preparation method thereof |
-
2017
- 2017-10-27 CN CN201711021829.XA patent/CN107856540B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106735176A (en) * | 2017-01-18 | 2017-05-31 | 成都锦钛精工科技有限公司 | Sub- titanium oxide metal composite is spherical or spherical powder and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| Magneli phase Ti4O7 electrode for oxygen reduction reaction and its implication for zinc-air rechargeable batteries;Xiaoxia Li;《Electrochimica Acta》;20100516;第55卷;第5891-5898页 * |
| Thermoelectric properties of in situ plasma spray synthesized sub stoichiometry TiO2-x;Hwasoo Lee et al.;《Scientific reports》;20161104;第6卷 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107856540A (en) | 2018-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103014587B (en) | Method for thermally spraying molybdenum coating on axial surface of crank shaft | |
| CN107354421B (en) | A kind of preparation method of graphene-copper-amorphous composite coating | |
| CN107839487B (en) | Novel high-performance repairable pantograph slide plate of electric locomotive and preparation method thereof | |
| CN107794486B (en) | High-performance long-life space equipment precision conductive slip ring and preparation method thereof | |
| US10388964B2 (en) | Graphene-based coating on lead grid for lead-acid batteries | |
| CN110890537B (en) | Production method of high-purity nanocrystalline silicon | |
| CN114695865A (en) | Silicon negative electrode material, preparation method thereof, negative electrode plate and lithium ion battery | |
| CN105845935B (en) | A method of preparing battery graphite cathode material using special graphite powder | |
| CN112271283A (en) | Negative pole piece and lithium ion battery | |
| CN107856540B (en) | Trolley bus pantograph slide plate with long service life and preparation method thereof | |
| CN110335993A (en) | A kind of porous silicon/oxidative silicon/carbon composite of the ball shaped nano of lithium ion battery and preparation method thereof | |
| CN105714172A (en) | Corrosion-resistant grounding grid metal ceramic coating material and preparation device and method thereof | |
| CN111180713A (en) | Silicon-carbon negative electrode material for lithium ion battery and preparation method thereof | |
| CN108425085A (en) | A kind of compound CuNiIn powder and the preparation method and application thereof | |
| CN205528977U (en) | Corrosion resistant ground net cermet coating material's preparation facilities | |
| CN112410597B (en) | Preparation method of nano WC dispersion strengthened copper | |
| CN107815634B (en) | High-performance long-service-life remanufacturable life-prolonging collecting ring and preparation method thereof | |
| CN109930146A (en) | A method of submerged-arc welding contact tube is repaired based on low pressure cold spray technique | |
| CN114990383B (en) | Titanium alloy for improving yield ratio of electrode induction smelting inert gas atomized powder fine powder and preparation method of atomized powder | |
| CN115216118A (en) | Insulating material and preparation process thereof | |
| CN113213447A (en) | Preparation method of high-rate lithium iron phosphate cathode material | |
| JP4133105B2 (en) | Carbon-based sintered sliding plate material with crack resistance | |
| CN1206937A (en) | Porous acid-resistant alloy and fibre composite blate matrix | |
| CN213403570U (en) | Hollow graphite electrode | |
| CN112072115B (en) | Method for constructing graphite porous silicon-carbon composite negative electrode material by synchronously purifying graphite and preparing porous silicon-carbon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |