CN110683854A - Pantograph carbon slide plate and preparation method thereof - Google Patents
Pantograph carbon slide plate and preparation method thereof Download PDFInfo
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- CN110683854A CN110683854A CN201911147707.4A CN201911147707A CN110683854A CN 110683854 A CN110683854 A CN 110683854A CN 201911147707 A CN201911147707 A CN 201911147707A CN 110683854 A CN110683854 A CN 110683854A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
- C04B35/83—Carbon fibres in a carbon matrix
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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
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
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Abstract
The invention discloses a pantograph carbon slide plate which is prepared from the following materials in parts by weight: 2-40 parts of carbon black, 20-50 parts of coke, 1-8 parts of carbon fiber, 20-50 parts of graphite, 1-2 parts of internal mold release agent, 1-4 parts of graphene and 1-15 parts of copper fiber. The invention also discloses a preparation method of the pantograph carbon slide plate, which is used for modifying the existing carbon slide plate and solving the problems that the carbon slide plate in the prior art has poor impact toughness, the carbon slide plate is easy to fall off under the impact of hard points of a contact network cable, even a large area of carbon slide plate falls off, locomotive accidents are caused, the running cost is increased, and the running safety of an electric locomotive is influenced.
Description
Technical Field
The invention belongs to the technical field of railway vehicles, and particularly relates to a carbon pantograph slider and a preparation method thereof.
Background
The development of electric locomotives in China from steam locomotives to electric locomotives and high-speed rail cars at present does not reflect the vigorous development of the railway industry in China, and the electric locomotives and even the high-speed rail cars acquire electric energy from a contact network and convert the electric energy of a power grid into locomotive driving energy, so that a carbon sliding plate of the electric locomotive does not reflect an important role.
The existing carbon sliding plate has poor impact toughness, and is easy to fall off the carbon sliding plate and even fall off the carbon sliding plate in a large area under the impact of hard points of a contact network cable, so that locomotive accidents are caused, the running cost is increased, and the running safety of the electric locomotive is influenced.
Disclosure of Invention
The invention aims to provide a pantograph carbon slide plate, which solves the problems that in the prior art, the carbon slide plate has poor impact toughness, and the carbon slide plate is easy to fall off under the impact of hard points contacting with a network cable, even a large area of carbon slide plate falls off, so that locomotive accidents are caused, the running cost is increased, and the running safety of an electric locomotive is influenced.
The invention also aims to provide a preparation method of the carbon sliding plate.
The invention adopts the technical scheme that the pantograph carbon slide plate is composed of the following substances in parts by weight: 2-40 parts of carbon black, 20-50 parts of coke, 1-8 parts of carbon fiber, 20-50 parts of graphite, 1-2 parts of internal mold release agent, 1-4 parts of graphene and 1-15 parts of copper fiber.
The invention is also characterized in that:
the internal release agent is polyethylene glycol.
The copper fibers are chopped copper fibers with the diameter of less than 40 mu m.
The invention adopts another technical scheme that the preparation method of the carbon sliding plate comprises the following steps:
step 1: putting the carbon strip raw material for the pantograph carbon slide plate into a kneading pot, and kneading to obtain a mixed material;
step 2: pre-pressing the mixed material to prepare a carbon strip primary blank for the carbon sliding plate;
and step 3: placing the carbon strip primary blank for the carbon sliding plate in an extruder, and carrying out extrusion forming treatment to prepare a carbon strip blank for the carbon sliding plate;
and 4, step 4: and roasting the carbon strip blank for the carbon slide plate to obtain the carbon strip for the carbon slide plate of the pantograph.
The invention is also characterized in that:
the extrusion forming treatment in the step 3 comprises the following steps of:
step 3.1: placing the carbon slide plate pre-pressed carbon strip primary blank in an extruder, heating and vacuumizing;
step 3.2: vacuumizing for 2min, pressurizing, and extruding the carbon strips in an extruder to form strip-shaped carbon strip blanks;
step 3.3: and (4) cooling and shaping the carbon strip blank, and using the carbon strip blank for the carbon sliding plate.
The temperature of the roasting treatment in the step 4 is 1200 ℃, and the treatment time is 240 hours.
The invention has the beneficial effects that:
the carbon pantograph slider provided by the invention solves the problems that in the prior art, the carbon slider has poor impact toughness, and is easy to fall off under the impact of hard points contacting with a network cable, even a large area of carbon slider falls off, so that locomotive accidents are caused, the running cost is increased, and the running safety of an electric locomotive is influenced.
The method has the following specific advantages:
1. according to the carbon strip for the pantograph carbon slide plate, the graphene is added, so that the strength of the carbon strip is improved, the resistivity is reduced, the conductivity is strong, and the service life is prolonged.
2. The carbon strip of the pantograph carbon slide plate has proper hardness, and the Rockwell hardness reaches HS 60-100; the carbon strips have high strength, the breaking strength and the impact toughness are both obviously improved, and the breaking strength is more than or equal to 32 MPa; the impact toughness reaches more than or equal to 0.14J/cm 2.
3. The carbon strip of the pantograph carbon slide plate is simple in preparation process, low in cost and suitable for large-scale production.
4. The carbon strip for the carbon sliding plate improves the impact toughness of the carbon sliding plate, avoids unnecessary phenomenon of dropping blocks of the carbon sliding plate, and improves the reliability and the wear resistance of the carbon sliding plate.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example 1
Weighing 2 parts of carbon black, 20 parts of coke, 1 part of carbon fiber, 20 parts of graphite, 1 part of internal release agent, 1 part of graphene and 1 part of copper fiber according to the weight proportion, adding the carbon black, the coke, the carbon fiber, the graphite, the internal release agent and the copper fiber into a kneading pot, stirring, and carrying out primary kneading treatment, wherein the temperature is controlled to be 150 ℃ in the primary kneading treatment process; after kneading for 30min, adding the raw material graphene, and continuing to perform secondary kneading at the temperature of 150 ℃; after kneading for 50min, naturally cooling to 100 ℃ to obtain a mixed viscous material; adding the viscous mixture into a die cavity of a hydraulic press, and performing pre-compression treatment at room temperature to obtain a carbon slide plate carbon strip primary blank; wherein the prepressing pressure is 8MPa, and the prepressing time is 4 s; taking out the carbon slide plate carbon strip primary blank subjected to the hot pressing treatment, placing the carbon slide plate carbon strip primary blank into a material cavity of an extruder, heating and vacuumizing, wherein the heating temperature is controlled to 150 ℃, vacuumizing is carried out for 2min under the condition that the temperature is kept at 150 ℃, and then pressurizing is carried out on the carbon strip primary blank, and the carbon strip is extruded to form a strip-shaped carbon strip blank, wherein the temperature is kept at 150 ℃ and the pressure is 20MPa in the pressurizing treatment process; and (3) placing the carbon slide plate carbon strip blank in a roasting furnace, gradually raising the temperature in the furnace to 1200 ℃ within 150h, preserving the temperature for 90h, and roasting to obtain the carbon slide plate carbon strip.
Example 2
Weighing 10 parts of carbon black, 30 parts of coke, 4 parts of carbon fiber, 25 parts of graphite, 1 part of internal mold release agent, 2 parts of graphene and 5 parts of copper fiber according to the weight proportion, adding the carbon black, the coke, the carbon fiber, the graphite, the internal mold release agent and the copper fiber into a kneading pot, stirring, and carrying out primary kneading treatment, wherein the temperature is controlled to be 150 ℃ in the primary kneading treatment process; after kneading for 30min, adding the raw material graphene, and continuing to perform secondary kneading at the temperature of 150 ℃; after kneading for 50min, naturally cooling to 100 ℃ to obtain a mixed viscous material; adding the viscous mixture into a die cavity of a hydraulic press, and performing pre-compression treatment at room temperature to obtain a carbon slide plate carbon strip primary blank; wherein the prepressing pressure is 8MPa, and the prepressing time is 4 s; taking out the carbon slide plate carbon strip primary blank subjected to the hot pressing treatment, placing the carbon slide plate carbon strip primary blank into a material cavity of an extruder, heating and vacuumizing, wherein the heating temperature is controlled to 150 ℃, vacuumizing is carried out for 2min under the condition that the temperature is kept at 150 ℃, and then pressurizing is carried out on the carbon strip primary blank, and the carbon strip is extruded to form a strip-shaped carbon strip blank, wherein the temperature is kept at 150 ℃ and the pressure is 20MPa in the pressurizing treatment process; and (3) placing the carbon slide plate carbon strip blank in a roasting furnace, gradually raising the temperature in the furnace to 1200 ℃ within 150 hours, preserving the temperature for 90 hours, and roasting to obtain the carbon slide plate carbon strip.
Example 3
Weighing 20 parts of carbon black, 40 parts of coke, 6 parts of carbon fiber, 30 parts of graphite, 2 parts of internal mold release agent, 3 parts of graphene and 10 parts of copper fiber according to the weight proportion, adding the carbon black, the coke, the carbon fiber, the graphite, the internal mold release agent and the copper fiber into a kneading pot, stirring, and carrying out primary kneading treatment, wherein the temperature is controlled to be 150 ℃ in the primary kneading treatment process; after kneading for 30min, adding the raw material graphene, and continuing to perform secondary kneading at the temperature of 150 ℃; after kneading for 50min, naturally cooling to 100 ℃ to obtain a mixed viscous material; adding the viscous mixture into a die cavity of a hydraulic press, and performing pre-compression treatment at room temperature to obtain a carbon slide plate carbon strip primary blank; wherein the prepressing pressure is 8MPa, and the prepressing time is 4 s; taking out the carbon slide plate carbon strip primary blank subjected to the hot pressing treatment, placing the carbon slide plate carbon strip primary blank into a material cavity of an extruder, heating and vacuumizing, wherein the heating temperature is controlled to 150 ℃, vacuumizing is carried out for 2min under the condition that the temperature is kept at 150 ℃, and then pressurizing is carried out on the carbon strip primary blank, and the carbon strip is extruded to form a strip-shaped carbon strip blank, wherein the temperature is kept at 150 ℃ and the pressure is 20MPa in the pressurizing treatment process; and (3) placing the carbon slide plate carbon strip blank in a roasting furnace, gradually raising the temperature in the furnace to 1200 ℃ within 150 hours, preserving the temperature for 90 hours, and roasting to obtain the carbon slide plate carbon strip.
Example 4
Weighing 30 parts of carbon black, 50 parts of coke, 7 parts of carbon fiber, 40 parts of graphite, 2 parts of internal mold release agent, 4 parts of graphene and 12 parts of copper fiber according to the weight proportion, adding the carbon black, the coke, the carbon fiber, the graphite, the internal mold release agent and the copper fiber into a kneading pot, stirring, and carrying out primary kneading treatment, wherein the temperature is controlled to be 150 ℃ in the primary kneading treatment process; after kneading for 30min, adding the raw material graphene, and continuing to perform secondary kneading at the temperature of 150 ℃; after kneading for 50min, naturally cooling to 100 ℃ to obtain a mixed viscous material; adding the viscous mixture into a die cavity of a hydraulic press, and performing pre-compression treatment at room temperature to obtain a carbon slide plate carbon strip primary blank; wherein the prepressing pressure is 8MPa, and the prepressing time is 4 s; taking out the carbon slide plate carbon strip primary blank subjected to the hot pressing treatment, placing the carbon slide plate carbon strip primary blank into a material cavity of an extruder, heating and vacuumizing, wherein the heating temperature is controlled to 150 ℃, vacuumizing is carried out for 2min under the condition that the temperature is kept at 150 ℃, and then pressurizing is carried out on the carbon strip primary blank, and the carbon strip is extruded to form a strip-shaped carbon strip blank, wherein the temperature is kept at 150 ℃ and the pressure is 20MPa in the pressurizing treatment process; and (3) placing the carbon slide plate carbon strip blank in a roasting furnace, gradually raising the temperature in the furnace to 1200 ℃ within 150 hours, preserving the temperature for 90 hours, and roasting to obtain the carbon slide plate carbon strip.
Example 5
Weighing 40 parts of carbon black, 50 parts of coke, 8 parts of carbon fiber, 50 parts of graphite, 2 parts of internal mold release agent, 4 parts of graphene and 15 parts of copper fiber according to the weight proportion, adding the carbon black, the coke, the carbon fiber, the graphite, the internal mold release agent and the copper fiber into a kneading pot, stirring, and carrying out primary kneading treatment, wherein the temperature is controlled to be 150 ℃ in the primary kneading treatment process; after kneading for 30min, adding the raw material graphene, and continuing to perform secondary kneading at the temperature of 150 ℃; after kneading for 50min, naturally cooling to 100 ℃ to obtain a mixed viscous material; adding the viscous mixture into a die cavity of a hydraulic press, and performing pre-compression treatment at room temperature to obtain a carbon slide plate carbon strip primary blank; wherein the prepressing pressure is 8MPa, and the prepressing time is 4 s; taking out the carbon slide plate carbon strip primary blank subjected to the hot pressing treatment, placing the carbon slide plate carbon strip primary blank into a material cavity of an extruder, heating and vacuumizing, wherein the heating temperature is controlled to 150 ℃, vacuumizing is carried out for 2min under the condition that the temperature is kept at 150 ℃, and then pressurizing is carried out on the carbon strip primary blank, and the carbon strip is extruded to form a strip-shaped carbon strip blank, wherein the temperature is kept at 150 ℃ and the pressure is 20MPa in the pressurizing treatment process; and (3) placing the carbon slide plate carbon strip blank in a roasting furnace, gradually raising the temperature in the furnace to 1200 ℃ within 150 hours, preserving the temperature for 90 hours, and roasting to obtain the carbon slide plate carbon strip.
The prepared carbon slide plate carbon strip is subjected to performance test, and the test result is shown in table 1.
TABLE 1
As can be seen from the data in Table 1, the strength, hardness and impact toughness of the carbon bars of examples 1-5 are progressively improved; compared with the existing carbon sliding plate, the carbon strip has low resistivity, improved hardness, improved breaking strength and obviously improved impact toughness. The invention reduces the probability of the occurrence of the block falling phenomenon by improving the strength, hardness and impact toughness of the carbon strip, thereby improving the existing carbon strip, reducing the operation cost of the electric locomotive and ensuring the operation safety of the electric locomotive.
Claims (6)
1. The pantograph carbon slide plate is characterized by comprising the following materials in parts by weight: 2-40 parts of carbon black, 20-50 parts of coke, 1-8 parts of carbon fiber, 20-50 parts of graphite, 1-2 parts of internal mold release agent, 1-4 parts of graphene and 1-15 parts of copper fiber.
2. The pantograph carbon slide of claim 1, wherein said internal mold release agent is polyethylene glycol.
3. The pantograph carbon slide of claim 1, wherein said copper fibers are chopped copper fibers having a diameter of less than 40 μm.
4. A method of manufacturing a pantograph carbon slide as claimed in any one of claims 1 to 3, comprising the steps of:
step 1: putting the carbon strip raw material for the pantograph carbon slide plate into a kneading pot, and kneading to obtain a mixed material;
step 2: pre-pressing the mixed material to prepare a carbon strip primary blank for the carbon sliding plate;
and step 3: placing the carbon strip primary blank for the carbon sliding plate in an extruder, and carrying out extrusion forming treatment to prepare a carbon strip blank for the carbon sliding plate;
and 4, step 4: and roasting the carbon strip blank for the carbon slide plate to prepare the carbon strip for the carbon slide plate of the pantograph.
5. The method for manufacturing a carbon sliding plate according to claim 4, wherein the extrusion molding process in the step 3 comprises the steps of, in order:
step 3.1: placing the carbon slide plate pre-pressed carbon strip primary blank in an extruder, heating and vacuumizing;
step 3.2: vacuumizing for 2min, pressurizing, and extruding the carbon strips in an extruder to form strip-shaped carbon strip blanks;
step 3.3: and (4) cooling and shaping the carbon strip blank, and using the carbon strip blank for the carbon sliding plate.
6. The method for manufacturing a carbon sliding plate according to claim 4, wherein the temperature of the firing treatment in the step 4 is 1200 ℃ and the treatment time is 240 hours.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111792935A (en) * | 2020-07-24 | 2020-10-20 | 兴和县青山特种石墨碳素有限公司 | High-strength wear-resistant carbon sliding plate for pantograph and preparation method thereof |
| CN114685186A (en) * | 2022-03-25 | 2022-07-01 | 长沙诚智新材料科技有限公司 | Modified carbon fiber, modified carbon graphite material and preparation method thereof |
| CN114956847A (en) * | 2022-05-09 | 2022-08-30 | 合肥工业大学 | Preparation method of needle coke reinforced pure carbon pantograph carbon slide plate |
| CN116715533A (en) * | 2023-08-11 | 2023-09-08 | 西南交通大学 | Preparation method of carbon fiber reinforced pantograph slide plate for growing silicon carbide nanowire |
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| JP2001011479A (en) * | 1999-07-02 | 2001-01-16 | Railway Technical Res Inst | Preparation of carbon electricity-collecting and sliding material |
| CN1468891A (en) * | 2002-10-22 | 2004-01-21 | 宜兴市溢洋清骅墨根材料有限公司 | Carbon fiber reinforced slide plate for pantograph of electric locomotive and its manufacture |
| CN109422541A (en) * | 2017-08-31 | 2019-03-05 | 苏州东南佳新材料股份有限公司 | A kind of pantograph carbon slide carbon item |
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| CN111792935A (en) * | 2020-07-24 | 2020-10-20 | 兴和县青山特种石墨碳素有限公司 | High-strength wear-resistant carbon sliding plate for pantograph and preparation method thereof |
| CN114685186A (en) * | 2022-03-25 | 2022-07-01 | 长沙诚智新材料科技有限公司 | Modified carbon fiber, modified carbon graphite material and preparation method thereof |
| CN114956847A (en) * | 2022-05-09 | 2022-08-30 | 合肥工业大学 | Preparation method of needle coke reinforced pure carbon pantograph carbon slide plate |
| CN116715533A (en) * | 2023-08-11 | 2023-09-08 | 西南交通大学 | Preparation method of carbon fiber reinforced pantograph slide plate for growing silicon carbide nanowire |
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