CN107878205B - Oil-immersed pantograph carbon slide plate main carbon strip structure - Google Patents
Oil-immersed pantograph carbon slide plate main carbon strip structure Download PDFInfo
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- CN107878205B CN107878205B CN201711098223.6A CN201711098223A CN107878205B CN 107878205 B CN107878205 B CN 107878205B CN 201711098223 A CN201711098223 A CN 201711098223A CN 107878205 B CN107878205 B CN 107878205B
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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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- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention discloses a main carbon strip structure of an oil-immersed pantograph carbon slide plate, which comprises a main carbon strip fixedly arranged on an aluminum support, and is characterized in that an oil film layer is arranged on the upper surface of the main carbon strip. The invention has the advantages of low friction resistance, strong cracking resistance, simple process, convenient and safe processing, stable and reliable product quality and the like, and can improve the conductivity of the main carbon strip.
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 main carbon strip structure of oil-immersed pantograph carbon slide that frictional resistance is low, anti fracture ability is strong to make it can further improve main carbon strip electric conductive property, and have simple process, the processing is convenient and safe, characteristics that product quality is reliable and stable.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an oily formula pantograph carbon slide owner carbon strip structure, is including the fixed main carbon strip that sets up on the aluminium holds in the palm, its characterized in that, main carbon strip upper surface is provided with one deck oil film layer.
Therefore, the friction can be reduced better by means of the oil film layer, and the sliding effect is improved.
Further, the oil film layer is obtained by adopting the following method: carbon powder is mixed with asphalt material and pressed to obtain main carbon strips, and the main carbon strips are formed, boiled in machine oil and kept at 65-85 ℃ for 48-72 hours.
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, an embedded groove is formed in the upper surface of the main carbon strip along the length direction, a metal strip is fixedly embedded into the embedded groove, and the upper end surface of the metal strip and the upper end surface of the main carbon strip 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, 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 interface and are used for being connected with an air pressure detection device, and annular cutting openings which are formed by annular cutting and have the depth smaller than the thickness of the air pipe are arranged on 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 low friction resistance, strong cracking resistance, simple process, convenient and safe processing, stable and reliable product quality and the like, and can improve the conductivity of the main carbon strip.
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: as shown in fig. 1 to 6, the main carbon strip structure of the oil-immersed pantograph carbon slide plate comprises a main carbon strip 2 fixedly arranged on an aluminum support 1, and is characterized in that an oil film layer is arranged on the upper surface of the main carbon strip 2. Thus, the friction and friction can be better reduced, and the sliding effect is improved.
Wherein the oil film layer is obtained in the following manner, see fig. 6: carbon powder is mixed with asphalt material, the mixture is evenly mixed and pressed to obtain main carbon strips 2, and the main carbon strips are placed into machine oil 7 to be boiled after being formed and then are kept at 65-85 ℃ for 48-72 hours.
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.
When the method is implemented, the metal strip can be arranged after the oil film layer is generated on the main carbon strip. 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.
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 (8)
1. A main carbon strip structure of an oil-immersed pantograph carbon slide plate comprises a main carbon strip fixedly arranged on an aluminum support, and is characterized in that an oil film layer is arranged on the upper surface of the main carbon strip; an embedded groove is formed in the upper surface of the main carbon strip 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 notches with the depth smaller than the thickness of the air pipe are formed on 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.
2. The oil-immersed pantograph carbon slide plate main carbon strip structure according to claim 1, wherein the oil film layer is obtained by adopting the following method: carbon powder is mixed with asphalt material and pressed to obtain main carbon strips, and the main carbon strips are formed, boiled in machine oil and kept at 65-85 ℃ for 48-72 hours.
3. The oil-immersed pantograph carbon slide plate main carbon strip structure according to claim 2, wherein the engine oil is No. 10-20 engine oil.
4. The oil-immersed pantograph carbon slide plate main carbon strip structure according to claim 1, wherein the metal strip is made of a copper material.
5. The oil-immersed pantograph carbon slide plate main carbon strip structure according to claim 4, wherein the metal strip is a metal strip with equal width in the width direction, and the width is 0.5-5 mm.
6. The oil-immersed pantograph carbon slide plate main carbon strip structure according to claim 5, wherein the number of the metal strips in the width direction is two, and the two metal strips are arranged along the center symmetrically.
7. The oil-immersed pantograph carbon slide plate main carbon strip structure according to claim 1, wherein one metal strip is formed by 68 sections of metal strips, and each section of metal strip is 3cm long.
8. The oil-immersed pantograph carbon slide plate main carbon strip structure 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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| CN201711098223.6A CN107878205B (en) | 2017-11-09 | 2017-11-09 | Oil-immersed pantograph carbon slide plate main carbon strip structure |
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| CN107878205B true CN107878205B (en) | 2020-09-01 |
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| CN109795324B (en) * | 2019-03-04 | 2023-10-24 | 西南交通大学 | Pantograph head of annular shaft-rotating electric traction locomotive |
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| CN1041135A (en) * | 1988-09-16 | 1990-04-11 | 长春市粉末冶金厂 | Trolley bus collector-block produced via iron-based powder metallurgy |
| US5045646A (en) * | 1989-07-20 | 1991-09-03 | Musachio Nicholas R | Electrical vehicle transportation system |
| DE4326613A1 (en) * | 1993-08-07 | 1995-02-09 | Ringsdorff Werke Gmbh | Bow contact for current collectors |
| CN102432293A (en) * | 2011-09-26 | 2012-05-02 | 邢台驰宇电碳有限责任公司 | Electric locomotive pantograph carbon slide plate |
| CN103153682A (en) * | 2010-04-12 | 2013-06-12 | 霍夫曼电碳有限公司 | Sliding strip for a sliding contact device and method for producing a sliding strip |
| CN204263955U (en) * | 2014-12-05 | 2015-04-15 | 北京万高众业科技发展有限公司 | A kind of pantograph pan |
| CN104774012A (en) * | 2015-04-29 | 2015-07-15 | 四川理工学院 | Electric locomotive pantograph copper-soaking carbon contact strip producing method |
| CN204659466U (en) * | 2015-02-16 | 2015-09-23 | 霍夫曼电碳有限公司 | For sensor element and the carbon brush part of sensor device |
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2017
- 2017-11-09 CN CN201711098223.6A patent/CN107878205B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041135A (en) * | 1988-09-16 | 1990-04-11 | 长春市粉末冶金厂 | Trolley bus collector-block produced via iron-based powder metallurgy |
| US5045646A (en) * | 1989-07-20 | 1991-09-03 | Musachio Nicholas R | Electrical vehicle transportation system |
| DE4326613A1 (en) * | 1993-08-07 | 1995-02-09 | Ringsdorff Werke Gmbh | Bow contact for current collectors |
| CN103153682A (en) * | 2010-04-12 | 2013-06-12 | 霍夫曼电碳有限公司 | Sliding strip for a sliding contact device and method for producing a sliding strip |
| CN102432293A (en) * | 2011-09-26 | 2012-05-02 | 邢台驰宇电碳有限责任公司 | Electric locomotive pantograph carbon slide plate |
| CN204263955U (en) * | 2014-12-05 | 2015-04-15 | 北京万高众业科技发展有限公司 | A kind of pantograph pan |
| CN204659466U (en) * | 2015-02-16 | 2015-09-23 | 霍夫曼电碳有限公司 | For sensor element and the carbon brush part of sensor device |
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