EP0647993B1 - Balai en charbon et son procédé d'imprégnation - Google Patents

Balai en charbon et son procédé d'imprégnation Download PDF

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Publication number
EP0647993B1
EP0647993B1 EP94113830A EP94113830A EP0647993B1 EP 0647993 B1 EP0647993 B1 EP 0647993B1 EP 94113830 A EP94113830 A EP 94113830A EP 94113830 A EP94113830 A EP 94113830A EP 0647993 B1 EP0647993 B1 EP 0647993B1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
carbon
polyether
siloxane
impregnating agent
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.)
Expired - Lifetime
Application number
EP94113830A
Other languages
German (de)
English (en)
Other versions
EP0647993A3 (fr
EP0647993A2 (fr
Inventor
Rainer Dr. Sperling
Harald Friedrich
Günter Schardt
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.)
Schunk Kohlenstofftechnik GmbH
Original Assignee
Schunk Kohlenstofftechnik GmbH
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 Schunk Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP0647993A2 publication Critical patent/EP0647993A2/fr
Publication of EP0647993A3 publication Critical patent/EP0647993A3/fr
Application granted granted Critical
Publication of EP0647993B1 publication Critical patent/EP0647993B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
    • H01R39/22—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof incorporating lubricating or polishing ingredient
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/50—Lubricating compositions characterised by the base-material being a macromolecular compound containing silicon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • the invention relates to a carbon brush with a polyethersiloxane or Polymethylsiloxan is impregnated as an impregnating agent, in particular carbon brush for heavily used tools.
  • the invention further relates to a method for Impregnating a carbon brush or a carbon bar.
  • Impregnated carbon brush for electrical machines an impregnating agent containing grease, wax or oil as a lubricant.
  • the Impregnants are either liquid or solid at normal temperature and are in an impregnation bath in which the carbon brush is impregnated to a temperature brought equal to or above the melting point of the lubricant.
  • Petroleum jelly When used as an impregnating agent, the impregnating temperature is raised to approximately 100 ° C set. After the impregnation process, the carbon brush is at a temperature aftertreated, which is at least as high as the maximum operating temperature.
  • CH 262 391 describes a carbon brush, its mechanical properties should be improved in that an impregnation with e.g. a polysiloxane he follows. As with the state of the art already dealt with, this becomes Impregnant introduced under pressure into the pores of the carbon material. Herewith is however, the impregnation was not completed. Rather, it takes place at Temperatures e.g. in the range between 100 ° C and 150 ° C a polymerization of Impregnating agent to improve the strength of the carbon brush.
  • a carbon brush for electrical machines contains chlorine-containing polymers which are formed by crosslinking at least one compound the group of chlorinated organochlorosilanes and chlorinated organosiloxanes are formed.
  • An impregnated carbon brush is described in DE 26 09 834 C3, which is used as an impregnating agent a non-melting fat, a non-melting wax or a non-flowing Contains oil, the fat, wax or oil of the impregnating agent with a Gelling agent from montmorillonite scales, the surfaces of which are made with long-chain hydrocarbons are coated, intimately mixed and thus in the non-melting or not flowing, harder and abrasion-resistant condition. The impregnation takes place according to the vacuum pressure method.
  • Impregnated carbon brushes according to DE 26 09 834 C3 have proven themselves and show advantages in use in terms of good commutation, less spark interference, long service life and possible application with high performance. Desirable it would be, however, if there were other advantages related to brush wear, collector wear or the collector temperatures that occur during operation or the running time the machine would be given, especially if it is used in machines with temperature-sensitive commutators that are asbestos-free.
  • the present invention addresses the problem of having a carbon brush is impregnated with an impregnating agent, especially a cabbage brush for heavily used items Tools and a method for impregnating a carbon brush or one Coal bar to develop so that further improvements in mechanical running behavior the carbon brush can be achieved and in particular an unproblematic one Use with asbestos-free commutators is possible.
  • the impregnating agent used should be environmentally friendly.
  • Appropriate carbon brushes impregnated according to the invention are used, so surprisingly managed to significantly lower the commutator temperature and an increase in the service life and a significant reduction in the commutator attack be determined.
  • Corresponding carbon brushes are therefore particularly suitable for suitable for use in machines that have asbestos-free commutators.
  • polymethylsiloxane by long-chain alkyl and / or Alkylaryl residues is modified.
  • a reduction in brush collector wear and a reduction in Collector temperature could be reached especially when the impregnating agent the carbon brush is approximately 0.5 to 15 percent by weight.
  • the problem is solved in that the carbon brush or Carbon bars in a polyethersiloxane or polymethylsiloxane as an impregnating agent containing emulsion is impregnated, the polyether siloxane and the polymethylsiloxane have the structures defined in claim 1.
  • Impregnation agent does not have to be done using the vacuum pressure method, but that the carbon brush or the carbon bar only lasts for a certain period of time immerse the emulsion. The period is preferably between 0.5 and 5 hours, especially 1.5 to 2.5 hours. Then the carbon brush or the coal bar drained and then preferably by spinning at a Temperature between room temperature (20 ° C) and 90 ° C, especially around 80 ° C dried. The carbon brush is then immediately ready for use or the carbon bar could be machined directly to a carbon brush of the desired geometry.
  • water is used as an emulsifier and an environmentally compatible one as an impregnating agent Substance used that can not be a health hazard. Furthermore, it is not necessary for the carbon brush to be rinsed hot after impregnation will, so that no unwanted vapors occur.
  • a polymethylsiloxane modified by long-chain alkyl radicals was mixed with water stirred, the weight fraction of the impregnating agent was 5%. Homogenizing the emulsion was prepared at room temperature. After making the The carbon brush was then emulsified over a period of about 2 hours the emulsion heated to 80 ° C and then pulled out to the To drain the emulsion. The carbon brush was then spun dry at a temperature of 80 ° C without rinsing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Pens And Brushes (AREA)
  • Inert Electrodes (AREA)
  • Ceramic Products (AREA)

Claims (7)

  1. Balai en charbon comportant, comme agent d'imprégnation, un polyéthersiloxane ou un polyméthylsiloxane, notamment balai en charbon pour des outils fortement sollicités,
    caractérisé en ce que
    le polyéthersiloxane présente la structure suivante :
    Figure 00140001
    dans laquelle R est un polyéther et
    le polyméthylsiloxane modifié présente la structure suivante :
    Figure 00140002
    avec R = radical alkylaryl
    où le polyméthylsiloxane modifié présente la structure suivante :
    Figure 00140003
    avec R = radical alkyl ou radical Alkyl + polyéther.
  2. Balai en charbon selon la revendication 1,
    caractérisé en ce que
    le polyméthylsiloxane est modifié par un radical à longue chaíne alkyl et/ou alkylaryl.
  3. Balai en charbon selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    le balai de charbon imprégné contient entre 0,5 et 15 % en poids d'agent d'imprégnation.
  4. Procédé d'imprégnation d'un balai en charbon ou d'un verrou en charbon,
    caractérisé en ce que
    le balai en charbon ou le verrou en charbon est imprégné dans une émulsion contenant du polyéthersiloxane ou du polyméthylsiloxane comme agent d'imprégnation, le polyéthersiloxane et le polyméthylsiloxane ayant les structures définies dans la revendication 1.
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    l'émulsion contient de l'eau comme agent émulsifiant.
  6. Procédé selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    le balai en charbon ou le verrou en charbon est plongé dans l'émulsion contenant d'agent d'imprégnation pendant une durée (t), de préférence telle que 0,5 < t < 5 h à une température d'environ 50°C jusqu'à 90°C, de préférence de l'ordre de 80°C puis on enlève l'émulsion en excédent en laissant s'égoutter et, enfin, on sèche à une température (T), de préférence telle que 50° < T < 90°C.
  7. Procédé selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    le balai ou le verrou en charbon est centrifugé pendant le séchage.
EP94113830A 1993-09-09 1994-09-03 Balai en charbon et son procédé d'imprégnation Expired - Lifetime EP0647993B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4330547A DE4330547C2 (de) 1993-09-09 1993-09-09 Kohlebürste sowie Verfahren zum Imprägnieren einer solchen
DE4330547 1993-09-09

Publications (3)

Publication Number Publication Date
EP0647993A2 EP0647993A2 (fr) 1995-04-12
EP0647993A3 EP0647993A3 (fr) 1995-12-27
EP0647993B1 true EP0647993B1 (fr) 2000-03-15

Family

ID=6497260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113830A Expired - Lifetime EP0647993B1 (fr) 1993-09-09 1994-09-03 Balai en charbon et son procédé d'imprégnation

Country Status (5)

Country Link
US (1) US6068926A (fr)
EP (1) EP0647993B1 (fr)
AT (1) ATE190760T1 (fr)
DE (2) DE4330547C2 (fr)
ES (1) ES2144021T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10209199A1 (de) * 2002-03-04 2003-10-02 Schunk Kohlenstofftechnik Gmbh Verfahren zur Herstellung einer Mehrschicht-Kohlebürste
CN100388600C (zh) * 2003-09-04 2008-05-14 东炭化工株式会社 电动机械用碳刷
JP4618484B2 (ja) * 2004-08-26 2011-01-26 アイシン精機株式会社 金属黒鉛質ブラシ及び金属黒鉛質ブラシを備えたモータ
DE102006050817A1 (de) * 2006-10-27 2008-04-30 Robert Bosch Gmbh Elektrogerät sowie Zubehörteil für ein Elektrogerät

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US949988A (en) * 1904-12-02 1910-02-22 Gen Electric Treated carbon and the method of producing it.
CH262391A (fr) * 1946-02-09 1949-06-30 Lorraine Carbone Article contenant du carbone tel que, par exemple, pièce de machine et dispositif électrique, pièce de frein, etc. et procédé pour le fabriquer.
US2859139A (en) * 1954-12-07 1958-11-04 Union Carbide Corp Method of making a silica containing carbon brush and resulting article
FR1137952A (fr) * 1954-12-07 1957-06-06 Union Carbide & Carbon Corp Balai de contact électrique
US3088964A (en) * 1958-09-29 1963-05-07 Dow Corning 2-phenylpropyl organosiloxanes
US3751294A (en) * 1971-06-09 1973-08-07 G Fridman Brushes for electrical apparatus and methods for their manufacture
DE2609834C3 (de) * 1976-03-10 1981-01-08 Schunk & Ebe Gmbh, 6301 Heuchelheim Imprägnierte Kohlebürste für elektrische Maschinen und Verfahren zur Herstellung der Kohlebürste
US4420409A (en) * 1981-12-11 1983-12-13 Toray Silicone Company, Ltd. Hydraulic system and hydraulic fluid compositions comprising siloxane-oxyalkylene copolymers
DE3431533A1 (de) * 1984-08-28 1986-03-06 Ringsdorff-Werke GmbH, 5300 Bonn Kohlebuerste fuer elektrische maschinen

Also Published As

Publication number Publication date
ES2144021T3 (es) 2000-06-01
ATE190760T1 (de) 2000-04-15
EP0647993A3 (fr) 1995-12-27
DE4330547A1 (de) 1995-03-16
EP0647993A2 (fr) 1995-04-12
DE4330547C2 (de) 2002-01-24
DE59409203D1 (de) 2000-04-20
US6068926A (en) 2000-05-30

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