CN107856541B - Preparation method of main carbon strip structure of pantograph carbon slide plate - Google Patents
Preparation method of main carbon strip structure of pantograph carbon slide plate Download PDFInfo
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- CN107856541B CN107856541B CN201711098222.1A CN201711098222A CN107856541B CN 107856541 B CN107856541 B CN 107856541B CN 201711098222 A CN201711098222 A CN 201711098222A CN 107856541 B CN107856541 B CN 107856541B
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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
- B60L5/205—Details of contact bow with carbon contact members
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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
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention discloses a preparation method of a main carbon strip structure of a pantograph carbon slide plate, which comprises the steps of uniformly mixing carbon powder and an asphalt material, pressing to obtain a main carbon strip, and fixedly arranging the main carbon strip on an aluminum support in a bonding mode. The invention has the advantages of reducing the working friction resistance of the main carbon strip, improving the anti-cracking capability, improving the conductivity of the main carbon strip, along with simple process, convenient and safe processing, stable and reliable product quality and the like.
Description
Technical Field
The invention relates to the technical field of locomotive pantograph carbon slide plates; in particular to a main carbon strip structure of a carbon pantograph slider.
Background
The electric traction locomotive obtains electric energy from a contact net and is installed on the roof of the locomotive or the bullet train. The existing high-speed train in China mostly obtains electric energy from a road network wire through a pantograph carbon slide plate to drive a traction motor to run so as to drive the train to run. The existing carbon sliding plate generally comprises an aluminum support which is long and arched, and a main carbon strip fixedly arranged above the aluminum support, wherein the upper surface of the main carbon strip is a contact power receiving surface and is used for contacting with a lead of a road network and taking off current during working. Therefore, the conductivity and the friction resistance of the main carbon strip are very important performance parameters.
Earlier, the main carbon strips of the carbon slide plate are mainly made of pure carbon materials, but have poor electric conduction and friction resistance. In order to improve the conductive and current collecting performance and the friction resistance, the conventional carbon slide plate mainly has a metal-impregnated main carbon strip structure. The main metal-impregnated carbon strip structure is obtained by putting a pure carbon strip into high-temperature metal liquid and immersing the metal liquid into the carbon strip through high-pressure treatment. Therefore, the conductive and current collecting performance of the carbon strip is improved by the metal liquid immersed in the carbon strip, the wear resistance of the carbon strip is improved, and the service life of the carbon strip is prolonged.
However, the metal-impregnated main carbon strip structure still has the following defects: the process difficulty is high, the risk is high, the processing cost is high, and the stability and controllability of the product quality are poor due to uneven immersion of the metal liquid.
In addition, the existing carbon slide plate main carbon strip is in contact friction with the road network lead for a long time when in work, and has the defects of easy cracking and high friction resistance to cause failure.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to obtain a pantograph carbon slide plate main carbon strip structure preparation method capable of reducing the working friction resistance of a main carbon strip and improving the anti-cracking capability, and further improving the conductivity of the main carbon strip, and the pantograph carbon slide plate main carbon strip structure preparation method has the characteristics of simple process, convenience and safety in processing, and stable and reliable product quality.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of a main carbon strip structure of a pantograph carbon slide plate comprises the steps of uniformly mixing carbon powder and an asphalt material, pressing to obtain a main carbon strip, and fixedly arranging the main carbon strip on an aluminum support in a bonding mode, and is characterized in that the main carbon strip is placed into machine oil for boiling after being formed, and then is kept at the temperature of 65-85 ℃ for 48-72 hours.
Thus, by the method, an oil film layer can be generated on the upper surface of the main carbon strip. Therefore, the friction can be reduced better by means of the oil film layer, and the sliding effect is improved.
Meanwhile, the oil film layer is prepared in the mode, so that oil liquid molecules are combined and attached to the periphery of carbon particles on the surface of the main carbon strip, the sliding friction effect of the carbon particles on the surface of the main carbon strip is greatly improved, an oil film lubricating layer formed by combining the carbon particles and the oil liquid molecules is generated on the surface of the main carbon strip, the friction resistance is reduced, the main carbon strip and the mesh wire slide more smoothly, the mesh wire is protected, the friction and the abrasion are better avoided, and the service life is prolonged. After the heat preservation of above-mentioned time and temperature is handled simultaneously, can also further make in the machine oil soaks the small gas pocket clearance of filling main carbon strip surface part material, can regard as the fluid molecule loss replenishment to the oil film lubricant film in the use, can also play shock attenuation and moisturizing effect to main carbon strip surface like this simultaneously, fully avoid the fracture phenomenon that leads to easily because of drying and striking vibration in the carbon slide use, increase of service life better. Among them, if the temperature is too high, the retention time is too long, which easily causes the carbon rod to be burned out, resulting in a decrease in the overall strength, and if the temperature is too low, the retention time is too short, resulting in difficulty in achieving the above-mentioned excellent effects. Through experimental verification and optimization, the lubricating effect and the anti-cracking effect can be furthest improved by the oil film layer obtained after the main carbon strip is placed in engine oil to be boiled and then is kept at 70-80 ℃ for 65 hours, and the overall strength of the main carbon strip can be guaranteed not to be reduced to influence the product quality; wherein the engine oil is preferably No. 10-20 engine oil. The resistivity of the main carbon strip after the oil film layer is formed is increased by 1-2%, and the use is not influenced.
Further, after the main carbon strip is treated by engine oil, an embedded groove is formed in the upper surface in the length direction, a metal strip is fixedly embedded in the embedded groove, and the upper end surface of the metal strip and the upper end surface of the main carbon strip are flush to form a contact power receiving surface.
Therefore, the metal strip is embedded instead of a metal immersion process, and the surface of the embedded metal strip and the upper end surface of the main carbon strip jointly form a contact power receiving surface, so that the metal strip can also improve the conductivity of the main carbon strip and improve the wear resistance of the main carbon strip. Compared with a metal-soaking process mode, the conductivity is higher in stability and controllability, the production process is simpler, and the safety is higher.
Preferably, the embedded groove is a through groove in the thickness direction, and the lower surface of the metal strip and the lower surface of the main carbon strip are located at the same height. In this way, the conductivity can be better improved by virtue of the embedded metal strip.
Preferably, the metal strip is made of copper material. Therefore, the copper material has the advantages of low cost, favorable manufacture, good surface sliding property of the copper material, good conductive effect and the like.
Preferably, the metal strip is a metal strip with the same width in the width direction, and the width is 0.5-5 mm. If the size is too small, it is difficult to achieve good conductive effect, and if the size is too large, the friction force is too large, which easily causes damage to the network wires. In specific implementation, the more preferable width size range is 1-3 mm, so that the advantages of improving the conductive effect and not influencing the sliding contact effect of the contact receiving surface and the network wire can be better considered.
Preferably, the number of the metal strips in the width direction is two, and the two metal strips are symmetrically arranged along the center. Thus, the conductive effect can be improved and the damage of the network wire can be prevented.
As optimization, an air pipe is arranged at the lower end of the main carbon strip along the length direction, two ends of the air pipe downwards penetrate through the aluminum support to form an air pipe interface and are used for being connected with an air pressure detection device, and annular cutting openings with the depth smaller than the thickness of the air pipe are formed in the outer surface of the air pipe at intervals along the length direction; the metal strips are of a sectional structure in the length direction, gaps are reserved among the metal strips, and the positions of the gaps among the adjacent metal strips are correspondingly consistent with the positions of ring cuts on the air pipe.
Like this, the trachea and the pressure detection device that set up constitute pantograph safety protection system together with pantograph elevating gear for in the pantograph use, if meet when the circumstances such as obstacle striking, main carbon strip and network wire contact department atress condition increase suddenly, can lead to the trachea to follow the disconnection of ring incision department and lose heart, then the pressure detection device detects the atmospheric pressure and reduces the back, just controls the timely decline realization protection of pantograph. However, in the existing pantograph safety protection system, because the main carbon strip is of a molten metal immersion type structure, the immersion effect of molten metal is difficult to control accurately, and the hardness of the surface of the main carbon strip is often inconsistent due to uneven immersion of the molten metal. Therefore, when the impact position is the position with higher surface hardness of the main carbon strip, the main carbon strip can not crack, so that the air pipe can not timely leak air, the bow-lowering protection can not be realized, and the situation of air leakage under the conventional vibration condition can also occur in the place with poorer hardness, so that the normal operation of the train is influenced. After the structure is improved, the distance between the inner end of the gap between each section of metal strip and the position of the ring opening on the corresponding air pipe is consistent with the material, the impact protection effect of any position in the length direction of the main carbon strip is accurately ensured to meet the requirement, when the impact force is greater than the preset value, the air pipe ring opening corresponding to the impact position and the main carbon strip between the ring opening and the gap of the corresponding metal strip can be cracked and outwards leaked, the bow reduction protection is realized, and the safety is improved.
Preferably, one metal strip is made up of 68 sections of metal strip, each section of metal strip being 3cm long.
Like this, the gap quantity between the metal strip corresponds unanimously with trachea ring incision quantity, can guarantee the effect of disappointing of striking well.
As optimization, the middle part of the lower surface of the main carbon strip is provided with an upward groove along the length direction, and the air pipe is embedded in the groove in a sealing manner. Thus, the arrangement of the air pipe is convenient.
In conclusion, the invention has the advantages of reducing the working friction resistance of the main carbon strips, improving the anti-cracking capability, improving the conductivity of the main carbon strips, along with simple process, convenient and safe processing, stable and reliable product quality and the like.
Drawings
Fig. 1 is a schematic structural view of a pantograph carbon slide plate according to an embodiment of the present invention, wherein an oval portion is a cross-sectional view to show an inner air pipe structure.
Fig. 2 is an enlarged view of a single oval in fig. 1.
Fig. 3 is a schematic view of a single primary carbon strip of fig. 1.
Fig. 4 is a top view of fig. 3.
Fig. 5 is a left sectional view of fig. 3.
Fig. 6 is a schematic view when an oil film layer is formed.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The specific implementation mode is as follows: see fig. 6; a preparation method of a main carbon strip structure of a pantograph carbon slide plate comprises the steps of uniformly mixing carbon powder and an asphalt material, pressing to obtain a main carbon strip, and fixedly arranging the main carbon strip on an aluminum support in a bonding mode, and is characterized in that the main carbon strip is placed into machine oil for boiling after being formed, and then is kept at the temperature of 65-85 ℃ for 48-72 hours.
Thus, by the method, an oil film layer can be generated on the upper surface of the main carbon strip. Therefore, the friction can be reduced better by means of the oil film layer, and the sliding effect is improved.
The oil film layer is prepared in the mode, so that oil liquid molecules are combined and attached to the periphery of carbon particles on the surface of the main carbon strip, the sliding friction effect of the carbon particles on the surface of the main carbon strip is greatly improved, an oil film lubricating layer formed by combining the carbon particles and the oil liquid molecules is generated on the surface of the main carbon strip, the friction resistance is reduced, the main carbon strip and the mesh wire slide more smoothly, the mesh wire is protected, the friction and the abrasion are better avoided, and the service life is prolonged. After the heat preservation of above-mentioned time and temperature is handled simultaneously, can also further make in the machine oil soaks the small gas pocket clearance of filling main carbon strip surface part material, can regard as the fluid molecule loss replenishment to the oil film lubricant film in the use, can also play shock attenuation and moisturizing effect to main carbon strip surface like this simultaneously, fully avoid the fracture phenomenon that leads to easily because of drying and striking vibration in the carbon slide use, increase of service life better. Among them, if the temperature is too high, the retention time is too long, which easily causes the carbon rod to be burned out, resulting in a decrease in the overall strength, and if the temperature is too low, the retention time is too short, resulting in difficulty in achieving the above-mentioned excellent effects. Through experimental verification and optimization, the lubricating effect and the anti-cracking effect can be furthest improved by the oil film layer obtained after the main carbon strip is placed in engine oil to be boiled and then is kept at 70-80 ℃ for 65 hours, and the overall strength of the main carbon strip can be guaranteed not to be reduced to influence the product quality; wherein the engine oil is preferably No. 10-20 engine oil. The resistivity of the main carbon strip after the oil film layer is formed is increased by 1-2%, and the use is not influenced.
Meanwhile, the southern area preferably adopts No. 10 engine oil due to higher air temperature, and the northern area preferably adopts No. 20 engine oil due to lower air temperature, so that the effect of generating an oil film layer can be better ensured.
In implementation, the main carbon strip structure shown in fig. 1-5 can be obtained by preparing the oil film layer on the main carbon strip, then slotting and arranging the metal strip.
Wherein, the 2 upper surfaces of main carbon strip are provided with the embedded groove along length direction, and the fixed metal strip 3 that is provided with of embedded in the embedded groove, 3 upper end surfaces of metal strip and 2 upper end surfaces of main carbon strip flush and constitute the contact and receive the electric surface jointly.
Therefore, the metal strip is embedded instead of a metal immersion process, and the surface of the embedded metal strip and the upper end surface of the main carbon strip jointly form a contact power receiving surface, so that the metal strip can also improve the conductivity of the main carbon strip and improve the wear resistance of the main carbon strip. Compared with a metal-soaking process mode, the conductivity is higher in stability and controllability, the production process is simpler, and the safety is higher.
Wherein, the embedded groove is logical groove on thickness direction, and 3 lower surfaces of metal strip and 2 lower surfaces of main carbon strip are located same height. In this way, the conductivity can be better improved by virtue of the embedded metal strip. Certainly during concrete implementation, the embedded groove lower extreme is reserved the end, and the metal strip parcel is the mode that this application can be implemented in the embedded groove also, but this kind of electric conductivity promotion effect is relatively poor.
Wherein, the metal strip 3 is made of copper material. Therefore, the copper material has the advantages of low cost, favorable manufacture, good surface sliding property of the copper material, good conductive effect and the like. Of course, other metal materials may be used in the specific implementation, and are within the scope of the present application.
The metal strip 3 is a metal strip with the same width in the width direction, and the width is 0.5-5 mm. If the size is too small, it is difficult to achieve good conductive effect, and if the size is too large, the friction force is too large, which easily causes damage to the network wires. In specific implementation, the more preferable width size range is 1-3 mm, so that the advantages of improving the conductive effect and not influencing the sliding contact effect of the contact receiving surface and the network wire can be better considered.
The two metal strips 3 are symmetrically arranged along the center in the width direction. Thus, the conductive effect can be improved and the damage of the network wire can be prevented.
The lower end of the main carbon strip 2 is provided with a gas pipe 4 along the length direction, two ends of the gas pipe 4 downwards penetrate through the aluminum support to form a gas pipe connector 5 and are used for connecting an air pressure detection device, and ring cuts which are formed by ring cutting and have the depth smaller than the thickness of the gas pipe are arranged on the outer surface of the gas pipe 4 at intervals along the length direction; the metal strips 3 are of a sectional structure in the length direction, gaps are reserved among the metal strips, and the positions of the gaps among the adjacent metal strips are correspondingly consistent with the positions of ring cuts on the air pipe.
Like this, the trachea and the pressure detection device that set up constitute pantograph safety protection system together with pantograph elevating gear for in the pantograph use, if meet when the circumstances such as obstacle striking, main carbon strip and network wire contact department atress condition increase suddenly, can lead to the trachea to follow the disconnection of ring incision department and lose heart, then the pressure detection device detects the atmospheric pressure and reduces the back, just controls the timely decline realization protection of pantograph. However, in the existing pantograph safety protection system, because the main carbon strip is of a molten metal immersion type structure, the immersion effect of molten metal is difficult to control accurately, and the hardness of the surface of the main carbon strip is often inconsistent due to uneven immersion of the molten metal. Therefore, when the impact position is the position with higher surface hardness of the main carbon strip, the main carbon strip can not crack, so that the air pipe can not timely leak air, the bow-lowering protection can not be realized, and the situation of air leakage under the conventional vibration condition can also occur in the place with poorer hardness, so that the normal operation of the train is influenced. After the structure is improved, the distance between the inner end of the gap between each section of metal strip and the position of the ring opening on the corresponding air pipe is consistent with the material, the impact protection effect of any position in the length direction of the main carbon strip is accurately ensured to meet the requirement, when the impact force is greater than the preset value, the air pipe ring opening corresponding to the impact position and the main carbon strip between the ring opening and the gap of the corresponding metal strip can be cracked and outwards leaked, the bow reduction protection is realized, and the safety is improved.
Wherein, a metal strip 3 comprises 68 sections of metal strips, and the length of each section of metal strip is 3 cm.
Like this, the gap quantity between the metal strip corresponds unanimously with trachea ring incision quantity, can guarantee the effect of disappointing of striking well.
Wherein, main carbon strip lower surface middle part is provided with ascending recess 6 along length direction, the trachea is sealed to be buried underground in the recess. Thus, the arrangement of the air pipe is convenient.
Claims (7)
1. A pantograph carbon slide plate main carbon strip structure preparation method comprises the steps of uniformly mixing and pressing carbon powder doped with asphalt materials to obtain main carbon strips, and fixedly arranging the main carbon strips on an aluminum support in a bonding mode, and is characterized in that the main carbon strips are placed in machine oil for boiling after being formed, and then are kept at 65-85 ℃ for 48-72 hours; the engine oil is No. 10-20 engine oil;
after the main carbon strip is treated by engine oil, an embedded groove is formed in the upper surface along the length direction, a metal strip is fixedly embedded in the embedded groove, and the upper end surface of the metal strip and the upper end surface of the main carbon strip are flush to form a contact power receiving surface; the embedded groove is a through groove in the thickness direction, and the lower surface of the metal strip and the lower surface of the main carbon strip are positioned at the same height;
the lower end of the main carbon strip is provided with an air pipe along the length direction, two ends of the air pipe downwards penetrate through the aluminum support to form an air pipe connector and are used for being connected with an air pressure detection device, and annular cutting openings, the depth of which is smaller than the thickness of the air pipe, are formed on the outer surface of the air pipe at intervals along the length direction by annular cutting; the metal strips are of a sectional structure in the length direction, gaps are reserved among the metal strips, and the positions of the gaps among the adjacent metal strips are correspondingly consistent with the positions of ring cuts on the air pipe.
2. The method for preparing the main carbon strip structure of the carbon pantograph slider as claimed in claim 1, wherein the holding temperature is within 70-80 ℃ and the holding retention time is 65 hours.
3. The method for preparing a carbon strip structure of a carbon pantograph slider as claimed in claim 1, wherein said metal strip is made of copper.
4. The method for preparing a carbon strip structure of a pantograph carbon slide plate according to claim 3, wherein the metal strip is a metal strip having a width equal to the width direction and having a width of 0.5 to 5 mm.
5. The method for preparing a carbon strip structure of a carbon pantograph slider as claimed in claim 4, wherein said metal strips are two strips symmetrically arranged along the center in the width direction.
6. The method for preparing a carbon strip structure of a pantograph carbon slide as claimed in claim 5, wherein one metal strip is composed of 68 sections of metal strips, each section of metal strip is 3cm long.
7. The method for preparing a main carbon strip structure of a pantograph carbon slide plate according to claim 1, wherein an upward groove is formed in the middle of the lower surface of the main carbon strip along the length direction, and the air pipe is embedded in the groove in a sealing manner.
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| CN108556635A (en) * | 2018-05-31 | 2018-09-21 | 北京万高众业科技股份有限公司 | A kind of pantograph carbon slide and preparation method thereof |
| CN112793426B (en) * | 2021-02-24 | 2022-09-02 | 华东交通大学 | Antifriction and wear-resistant pantograph suitable for bidirectional running |
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