EP0000980A1 - Contacteur collecteur de courant en charbon et dispositif pantographe - Google Patents

Contacteur collecteur de courant en charbon et dispositif pantographe Download PDF

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Publication number
EP0000980A1
EP0000980A1 EP78300220A EP78300220A EP0000980A1 EP 0000980 A1 EP0000980 A1 EP 0000980A1 EP 78300220 A EP78300220 A EP 78300220A EP 78300220 A EP78300220 A EP 78300220A EP 0000980 A1 EP0000980 A1 EP 0000980A1
Authority
EP
European Patent Office
Prior art keywords
carbon
contactor
carbons
pantograph
current collecting
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.)
Withdrawn
Application number
EP78300220A
Other languages
German (de)
English (en)
Inventor
W. King Ingersoll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airco Inc
Original Assignee
Airco Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Airco Inc filed Critical Airco Inc
Publication of EP0000980A1 publication Critical patent/EP0000980A1/fr
Withdrawn legal-status Critical Current

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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
    • B60L5/205—Details of contact bow with carbon contact members
    • 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

Definitions

  • the present invention relates to carbon current collecting contactors which are designed for sliding contact with an electric current carrying conductor. More particularly, the invention relates to current collecting carbons used on the pantographs of electric locomotives and self-propelled cars, which slide against overhead wires along which there may be obstructions and/or discontinuities.
  • Carbon has become a preferred material for pantograph current collectors because it offers greatly decreased wear of the overhead wire and of the carbon in comparison with the metal collectors used previously. Moreover lubrication is not necessary with carbon shoes. However, the grades of carbon used all suffer from the same defect, that of brittleness. As the overhead wire is usually suspended from a caternary cable by hangers, which tend to come loose and hang below the wire, the shoes often strike these hangers with extremely detrimental results. Moreover, the overhead wire is usually discontinuous, such discontinuities occurring at the junction of electrically isolated "sections" and at appurtenances such as draw bridges. Frequently foreign objects are maliciously or accidentally thrown over the overhead wire. Impact with any such objects causes chipping or fracture of the carbons.
  • the present invention is concerned with providing an improved current collector for electric railway use and the like, particularly to provide a carbon current collector with improved resistance to damage created by impact with a fixed object.
  • the present invention provides a carbon current collecting member having a pad of a resilient material attached to its leading edge. If, for example, a pad of silicone rubber is affixed to the leading edge of a carbon collector used on the pantograph shoe of a high-speed electric locomotive, it is found that the service life of the collector is quite remarkably increased.
  • a resilient material is affixed to the carbon in the place where most impacts take place, the leading edge.
  • the function of the resilient material is to spread the impact or shock load over a large portion of the brittle carbon and provide some cushion for the shock. It is found that a light hammer blow to an unprotected carbon collector will ordinarily chip or fracture the carbon. If the carbon is padded in accordance with the invention, the hammer blow will not damage it.
  • a suitable resilient material is essential to its success as a cushion for carbon pantograph current collectors. It must have wear properties compatible with the carbon; if it wears more slowly than the carbon, it will tend to prevent the carbon from making good contact with the wire. It must be able to withstand the heat and emitted radiation from electrical sparking without deterioration; it must be resistant to all weather conditions, including specifically, ice and subfreezing temperatures, and it must not break down at high local temperatures. as occur during, e.g., heating of a stationary car; it must at once be firm enough to distribute the shocks, but soft enough to deform and absorb the energy over a short period of time; and it must be capable of being permanently affixed to the carbon by means which have similar properties.
  • silicone rubber One material which has been proven suitable for carbon collector padding is that known as silicone rubber.
  • a suitable silicone rubber is known as "Silastic", made by Dow Corning Corporation, and described by them as a highly stable, hybrid elastomer". Pads cut from sheets of strips of this material may be attached to carbon collecters essentially covering their leading edges.
  • a suitable adhesive is another material made by Dow Corning Corporation, described by them as a vulcanizing silicone rubber adhesive, and sold under the trademark Silastic 732 RTV; other materials having similar properties might, of course, be used in place of either the silicone rubber or the adhesive mentioned.
  • FIG. 1 there is depicted a perspective view of a typical pantograph assembly 10 as mounted on a locomotive roof 11.
  • Bow 3 carrying three carbons 1
  • the contact wire 6 is hung from support catenary 15 by means of clamps 16 and 19 which are connected by wire cables 17.
  • Fig. 2 there is depicted an elevation of the pantograph bow 3, as seen from the front of the locomotive on which it is mounted, and a wire 6 with supporting structure.
  • Carbons 1 are shown partially obscured by rubber pads 2, which are affixed to the carbons 1.
  • the carbons 1 with their pads 2 are carried on a bow 3, which in turn is supported by brackets 4.
  • Pressure supplied by springs or by air or hydraulic pressure, is applied to supports 4 by the pantograph structure to urge the carbons 1 against the current supply wire 6, which is shown disproportionately large for clarity.
  • the current supply wire 6 depends from an overhead catenary 15.
  • the wire 6 is typically of roughly hourglass cross-section, as shown, so that a hooked clamp 16 may positively engage the grooves in the wire 6; a screw 18 holds the halves of clamp 16 together. Clearly, if screw 18 is loosened by vibration, the clamp will release the wire, and may then hang below the wire, and be struck by the carbon collectors of passing trains.
  • the overall length of the carbons 1 and pads 2 is typically about 35 inches (89 cm).
  • several carbons 1 are often used, so as to spread the wear and the electrical load over more surface area, and so that if support 4 is pivoted about a point P, the assembly can tilt in order to compensate for irregularities in the pantograph's alignment with respect to the wire.
  • Carbons 1 are typically 1 in.(2.5 cm) thick, and 1.3 in. (3.3 cm) wide.
  • the three carbons 1 shown in Fig. 3 may each be made u p of several individual pieces so that broken or worn out sections may be replaced without excessive waste.
  • FIG 3 is an enlarged cross-section taken along line A-A of Fig. 1.
  • the pad 2 is on only one side of each carbon; this arrangement is suitable for pantographs on locomotives which travel almost entirely in one direction.
  • a locomotive which was used extensively in both directions having a single pantograph were fitted with padded carbons, they would be advantageously padded on both sides.
  • Some locomotives are fitted with two pantographs, one for use in each direction.
  • the carbons would desirably be padded on one side only, but the carbons on one pantograph would be padded on the opposite side from those on the other.
  • FIG. 4 is an enlarged showing of one of the carbons of Fig. 3, together with details of the pad 2.
  • the carbon is made with an outwardly tapered bottom section, so as to be capable of engagement by a metal clamp 8, made of, e.g., galvanized steel sheet.
  • Clamp 8 is perforated, and carbon 1 is grooved on its base for bolts 7, which are then used to fasten the assembly to bow 3.
  • Pad 2 of silicone rubber as discussed above, may typically be 1/8 in. (3.2 mm) thick, 1/2 in. (13 mm) high, and run the full length of the carbon.
  • Pad 2 may be suitably attached with a thin layer of adhesive 9. This combination of materials and dimensions has proven to be effective in reducing the breakage rate of otherwise identical carbons.
  • Carbon pantograph collectors are prepared using conventional processes as described in the article by Liggett cited previously.
  • the carbon is either molded or extruded to shape.
  • the cross-section of the carbon is uniform from end to end, and the "green" carbon can therefore be extruded in long lengths, cut to length, and baked to carbonize it.
  • the carbon insert is of a complicated shape, and may be molded rather than extruded; the baking step is the same.
  • the metal content is typically 20-30% by weight.
  • Baked carbon is preferred over graphitized carbon as it is much harder and therefore wears more slowly; the advantage provided by the higher electrical conductivity of graphitized carbon can be matched by the impregnation of a conductive metal into the baked carbon product.
  • the padding spreads the impact over the surface of the carbon, and over a short but significant interval of time, thus reducing the instantaneous energy absorbed by any part of the carbon surface and preventing all but the most severe impacts from fracturing or chipping the carbon.
  • Padded carbons were then tested, each having a pad of silicone rubber, 1/2 in. (13 mm) high and 1/8 in. (3.2 mm) thick, cemented onto the leading edge of the carbon with Dow Corning silicone rubber adhesive. Eight locomotives were so equipped. It was found that the breakage rate dropped to 0.35 carbons per pantograph per month, and that both padding and adhesive withstood impacts, electrical arcing, heat and vibration very well, and did not deteriorate under service conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
EP78300220A 1977-08-25 1978-08-01 Contacteur collecteur de courant en charbon et dispositif pantographe Withdrawn EP0000980A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/827,520 US4146119A (en) 1977-08-25 1977-08-25 Impact-resistant carbon current collectors
US827520 2001-04-06

Publications (1)

Publication Number Publication Date
EP0000980A1 true EP0000980A1 (fr) 1979-03-07

Family

ID=25249433

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300220A Withdrawn EP0000980A1 (fr) 1977-08-25 1978-08-01 Contacteur collecteur de courant en charbon et dispositif pantographe

Country Status (2)

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US (1) US4146119A (fr)
EP (1) EP0000980A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242177A (en) * 1990-02-28 1991-09-25 Mannesmann Ag A current collector
US5176230A (en) * 1990-06-20 1993-01-05 Le Carbone-Lorraine Carbon friction strip with a damage detection facility
WO2013153230A3 (fr) * 2012-04-13 2013-11-28 Schunk Bahn- Und Industrietechnik Gmbh Dispositif de contact pour véhicules sur rails
US11944526B2 (en) 2013-09-19 2024-04-02 The Procter & Gamble Company Absorbent cores having material free areas
US12016761B2 (en) 2012-12-10 2024-06-25 The Procter & Gamble Company Absorbent article with high absorbent material content

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821254A1 (de) * 1988-06-23 1990-01-04 Hoffmann Elektrokohle Schleifstueck fuer stromabnehmer sowie verfahren zu seiner herstellung
DE19524708C2 (de) * 1995-07-10 2000-01-05 Deutsch Zentr Luft & Raumfahrt Stromabnehmer für ein Fahrzeug, insbesondere für ein Schienenfahrzeug
DE19856809A1 (de) * 1998-12-09 2000-06-15 Hoffmann Elektrokohle Verfahren zum Imprägnieren von porösen Werkstücken
CN110436926B (zh) * 2019-08-27 2021-04-06 西南交通大学 一种高电导率受电弓碳滑板及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE617411C (de) * 1935-08-19 Conradty Fa C Kohlenschleifstueck fuer elektrische Bahnen
DE679773C (de) * 1937-09-03 1939-08-15 Ottomar Kasperowski Dr Ing Kohleschleifstueck fuer Stromabnehmer elektrischer Fahrzeuge
US2221611A (en) * 1938-11-22 1940-11-12 Westinghouse Electric & Mfg Co Current collector
US2732423A (en) * 1956-01-24 morrison
DE1563951A1 (de) * 1967-01-18 1970-06-18 Conradty Fa C Kohleschleifleiste

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2844387A (en) * 1956-01-10 1958-07-22 Scholl Mfg Co Inc Prefabricated crash cushion
US3017529A (en) * 1960-06-09 1962-01-16 Walter O Helwig Electric brushes for electric motors and generators

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE617411C (de) * 1935-08-19 Conradty Fa C Kohlenschleifstueck fuer elektrische Bahnen
US2732423A (en) * 1956-01-24 morrison
DE679773C (de) * 1937-09-03 1939-08-15 Ottomar Kasperowski Dr Ing Kohleschleifstueck fuer Stromabnehmer elektrischer Fahrzeuge
US2221611A (en) * 1938-11-22 1940-11-12 Westinghouse Electric & Mfg Co Current collector
DE1563951A1 (de) * 1967-01-18 1970-06-18 Conradty Fa C Kohleschleifleiste

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242177A (en) * 1990-02-28 1991-09-25 Mannesmann Ag A current collector
GB2242177B (en) * 1990-02-28 1994-02-23 Mannesmann Ag Current collector
US5176230A (en) * 1990-06-20 1993-01-05 Le Carbone-Lorraine Carbon friction strip with a damage detection facility
WO2013153230A3 (fr) * 2012-04-13 2013-11-28 Schunk Bahn- Und Industrietechnik Gmbh Dispositif de contact pour véhicules sur rails
US12016761B2 (en) 2012-12-10 2024-06-25 The Procter & Gamble Company Absorbent article with high absorbent material content
US11944526B2 (en) 2013-09-19 2024-04-02 The Procter & Gamble Company Absorbent cores having material free areas

Also Published As

Publication number Publication date
US4146119A (en) 1979-03-27

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: INGERSOLL, W. KING