DE1038095B - Axially pre-stressed grinding piece made of carbon or similar material for bow-type pantographs - Google Patents
Axially pre-stressed grinding piece made of carbon or similar material for bow-type pantographsInfo
- Publication number
- DE1038095B DE1038095B DEST7325A DEST007325A DE1038095B DE 1038095 B DE1038095 B DE 1038095B DE ST7325 A DEST7325 A DE ST7325A DE ST007325 A DEST007325 A DE ST007325A DE 1038095 B DE1038095 B DE 1038095B
- Authority
- DE
- Germany
- Prior art keywords
- grinding piece
- carbon
- similar material
- bow
- contact strip
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 8
- 229910052799 carbon Inorganic materials 0.000 title claims description 8
- 239000000463 material Substances 0.000 title claims description 4
- 239000003245 coal Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Description
Axial auf Druck vorgespanntes Schleifstück aus Kohle oder ähnlichem Werkstoff für Bügelstromabnehmer Für Bügelstromabnehmer sind Schleifstücke aus Kohle oder ähnlichem Werkstoff bekannt, die zur Erhöhung ihrer Bruchfestigkeit mit Traggerüsten aus Metallprofilen oder axialen Rohren versehen sind, die mit den beiderseitigen Lagerungen verbunden sind. Es sind auch Schleifstücke bekannt, die durch Spanndrähte verstärkt werden, die in der unteren Zugzone festhaftend eingebettet sind oder die durch Zugfedern gespannt werden.Contact piece made of carbon or similar, axially pre-stressed under pressure Material for hoop pantographs For hoop pantographs, contact pieces are made of carbon or a similar material known to increase their breaking strength with shoring made of metal profiles or axial tubes are provided with the mutual Bearings are connected. There are also contact strips known by tension wires are reinforced, which are firmly embedded in the lower tensile zone or which be tensioned by tension springs.
Es ist bekannt, daß Schleifkohlen nur eine sehr geringe Zugfestigkeit im Vergleich zu ihrer Druckfestigkeit und eine äußerst geringe Dehnung besitzen. Bei Biegungsbeanspruchungen kann somit die Metallfassung des Schleifstückes kaum das Brechen der Kohlen verhindern, da die Bruchgrenze des Schleifstückes schon lange überschritten ist, bevor überhaupt eine merkliche Verbiegung der Metallfassung und damit eine unterstützende Lastaufnahme derselben eintritt.It is known that carbon brushes only have a very low tensile strength Compared to their compressive strength and have an extremely low elongation. The metal frame of the contact strip can hardly be used in the event of bending loads Prevent the coal from breaking, as the breaking point of the contact strip has been around for a long time is exceeded before any noticeable bending of the metal frame and so that a supporting load absorption of the same occurs.
Bei dem Schleifstück nach der Erfindung wird das Kohlenschleifstück durch eine sehr hoch bemessene spezifische axiale Spannkraft verspannt, und zwar etwa mit der halben Differenz zwischen der Druck-und der Zugfestigkeit der Kohle. Die axiale Spannkraft liegt dann je nach dem Querschnitt des Kohlenschleifstückes zwischen einer und mehreren Tonnen. Solche Kräfte können aber bei den kleinen Abmessungen der Wellenzapfen des Schleifstückes durch Anziehen von Muttern nicht erzielt werden. Nach der Erfindung wird daher diese Spannkraft durch ein lose geführtes Schrumpfelement im Innern des Schleifstückes und durch beiderseitige Druckplatten erzielt.In the grinding piece according to the invention, the coal grinding piece clamped by a very high specific axial clamping force, namely about half the difference between the compressive and tensile strength of the coal. The axial clamping force is then depending on the cross section of the carbon grinding piece between one and several tons. Such forces can, however, with the small dimensions the shaft journal of the contact strip cannot be achieved by tightening nuts. According to the invention, this clamping force is therefore provided by a loosely guided shrink element inside the contact strip and achieved by pressure plates on both sides.
Diese beiderseitigen Druckplatten besitzen zweckmäßig die Wellenzapfen für die Lagerung des Schleifstückes und außerdem Ansätze, mit denen sie in der Bohrung des Schleifstückes geführt sind.These two-sided pressure plates suitably have the shaft journals for the storage of the contact strip and also approaches with which it is in the bore of the contact strip are performed.
Die Zeichnung stellt ein Ausführungsbeispiel für ein Schleifstück nach der Erfindung dar, und zwar zeigt Fig. 1 eine Seitenansicht des Schleifstückes, hälftig im Schnitt, Fig. 2 einen Querschnitt z. B. eines Dreikant-Kohlenschleifstückes, das an beiden Enden bis auf den eingeschriebenen Kreis zugespitzt ist.The drawing represents an embodiment of a contact strip according to the invention, namely Fig. 1 shows a side view of the grinding piece, half in section, Fig. 2 shows a cross section z. B. a triangular carbon grinding piece, which is pointed at both ends except for the inscribed circle.
Das Kohlenschleifstück 1 besitzt eine zentrische Bohrung. Die beiderseitigen Druckplatten 2 mit den Wellenzapfen 3 für die Lagerung und den Führungsansätzen 5 sind miteinander durch die Schrumpfstange 4 durch Verschraubung verbunden. Beim Zusammenbau wird die Schrumpfstange 4 auf eine geeignet hohe Temperatur vorgewärmt, so daß sie nach Abkühlung bis zu ihrer Streckgrenze gespannt ist. Der Querschnitt und die Festigkeit der Schrumpfstange werden so gewählt, daß ihre spezifische Schrumpfkraft etwa gleich ist der halben Differenz zwischen der Zug- und der Druckfestigkeit der Kohle.The carbon grinding piece 1 has a central bore. The mutual Pressure plates 2 with the shaft journal 3 for storage and the guide approaches 5 are connected to one another by the shrink rod 4 by screwing. At the When assembling, the shrink rod 4 is preheated to a suitably high temperature, so that it is stretched to its yield point after cooling. The cross section and the strength of the shrink rod are chosen so that their specific shrinkage force is roughly equal to half the difference between the tensile and compressive strength of the Money.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST7325A DE1038095B (en) | 1953-11-18 | 1953-11-18 | Axially pre-stressed grinding piece made of carbon or similar material for bow-type pantographs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST7325A DE1038095B (en) | 1953-11-18 | 1953-11-18 | Axially pre-stressed grinding piece made of carbon or similar material for bow-type pantographs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1038095B true DE1038095B (en) | 1958-09-04 |
Family
ID=7454239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEST7325A Pending DE1038095B (en) | 1953-11-18 | 1953-11-18 | Axially pre-stressed grinding piece made of carbon or similar material for bow-type pantographs |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1038095B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3536843A1 (en) * | 1985-10-16 | 1987-04-16 | Dornier System Gmbh | PANTOGRAPH DEVICE |
| DE3546529C1 (en) * | 1985-10-16 | 1987-10-08 | Dornier System Gmbh | Carbon pantograph slipper |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE586884C (en) * | 1932-05-01 | 1933-10-27 | Siemens Planiawerke Akt Ges Fu | Resilient contact bracket made from individual grinding pieces arranged in a row |
| DE603443C (en) * | 1933-10-17 | 1934-09-29 | Ringsdorff Werke A G | Current collector bracket for electrically operated vehicles with carbon siding |
| DE870128C (en) * | 1950-08-17 | 1953-03-09 | Deutsche Bundesbahn | Carbon grinding piece with increased flexural strength for pantographs on electric rail vehicles |
-
1953
- 1953-11-18 DE DEST7325A patent/DE1038095B/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE586884C (en) * | 1932-05-01 | 1933-10-27 | Siemens Planiawerke Akt Ges Fu | Resilient contact bracket made from individual grinding pieces arranged in a row |
| DE603443C (en) * | 1933-10-17 | 1934-09-29 | Ringsdorff Werke A G | Current collector bracket for electrically operated vehicles with carbon siding |
| DE870128C (en) * | 1950-08-17 | 1953-03-09 | Deutsche Bundesbahn | Carbon grinding piece with increased flexural strength for pantographs on electric rail vehicles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3536843A1 (en) * | 1985-10-16 | 1987-04-16 | Dornier System Gmbh | PANTOGRAPH DEVICE |
| DE3546529C1 (en) * | 1985-10-16 | 1987-10-08 | Dornier System Gmbh | Carbon pantograph slipper |
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