EP0692844A1 - Connexion rotative à contact électrique - Google Patents

Connexion rotative à contact électrique Download PDF

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Publication number
EP0692844A1
EP0692844A1 EP95110789A EP95110789A EP0692844A1 EP 0692844 A1 EP0692844 A1 EP 0692844A1 EP 95110789 A EP95110789 A EP 95110789A EP 95110789 A EP95110789 A EP 95110789A EP 0692844 A1 EP0692844 A1 EP 0692844A1
Authority
EP
European Patent Office
Prior art keywords
contact
pin
sleeve
rollers
electrical contact
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.)
Granted
Application number
EP95110789A
Other languages
German (de)
English (en)
Other versions
EP0692844B1 (fr
Inventor
Björn Eriksson
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.)
ABB AB
Original Assignee
Asea Brown Boveri AB
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 Asea Brown Boveri AB filed Critical Asea Brown Boveri AB
Publication of EP0692844A1 publication Critical patent/EP0692844A1/fr
Application granted granted Critical
Publication of EP0692844B1 publication Critical patent/EP0692844B1/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
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
    • H01R35/04—Turnable line connectors with limited rotation angle with frictional contact members
    • 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
    • H01R39/64—Devices for uninterrupted current collection

Definitions

  • the invention relates to a rotatable electric contact connection according to the precharacterising part of claim 1.
  • the invention is intended for use in joints where there is a need both to journal radially in bearings and to transmit both high and low currents.
  • a roller contact device in which between a rotatable contact pin and a surrounding stationary contact sleeve there are arranged a plurality of contact rollers in the form of helical springs, which are distributed around the circumference of the contact pin supported by rods fixed to the contact sleeve, the rods extending axially through the respective springs.
  • a relatively large space is required between the contact pin and the sleeve to accommodate the helical spring rollers. This requires a relatively large quantity of lubricant.
  • the design is also relatively expensive because of the special attachment of the spring rollers.
  • the invention aims to provide a rotatable electric contact connection of the above-mentioned kind, which is less expensive and less space-demanding than the above-mentioned prior art design.
  • the invention suggests a rotatable electric contact connection according to the introductory part of claim 1, which is characterized by the features of the characterizing part of claim 1.
  • the current transmission between the two conductors is ensured by constructing the contact rollers in the form of hardened, solid pins, so-called needles, of a resilient contact material, and by designing the contact pin and the contact sleeve with radially outwardly projecting annular elevations and radially inwardly projecting annular elevations, respectively, of one or a few tenths of a millimetre in such a way that the needles are strained in wave form to provide the necessary contact force at the points of contact.
  • Figure 1 shows the principle of a rotatable electric contact connection, designed according to the invention, between two concentric conductors 10 and 11, which are rotatable in relation to each other.
  • the conductor 10 consists of a tubular contact sleeve, which surrounds the end portion of the conductor 11, which consists of a contact pin of circular cross section.
  • the internal diameter of the contact sleeve 10 is larger than the external diameter of the contact pin, an annular gap 12 thus being formed between the pin and the sleeve, in which gap a number of elongated, thin, solid rollers 13 of resilient contact material are arranged.
  • the contact pin 11 and the contact sleeve 10 are provided with radially outwardly projecting annular elevations 14 and radially inwardly projecting annular elevations 15, respectively, manufactures preferably by turning, in such a way that the rollers 13 are strained in wave form with a prestress force of, for example, about 5 N per point of contact.
  • the radial extent of these outwardly and inwardly projecting annular elevations is, in practice, only one or a few tenths of a millimetre but has been enlarged in Figure 1 to illustrate the invention more clearly.
  • the mounting of the rollers 13 is suitably performed such that they are pressed in between the pin 11 and the sleeve 10 after the pin has been placed in position in the sleeve.
  • the radially outwardly and inwardly projecting annular elevations 14 and 15, respectively, are made with bevelled edges, as is clear from Figures 2 and 3, to make possible such mounting.
  • Figure 2 shows a rotatable electric contact device for a high-voltage disconnector.
  • the contact device comprises a bracket 16 of, for example, aluminium, which is fixed to the upper end of a vertical support insulator (not shown), which is rotatable, for example, 90° about its longitudinal axis.
  • a connecting arm 17 is fixed to the bracket 16.
  • the bracket 16 has a circular-cylindrical hole 18 (Figure 3), coaxial with the rotary axis of the support insulator, in which hole a contact sleeve 10 of copper or copper alloy is fixed.
  • External cable connection to the connecting arm 17 of the disconnector is performed via a connection member 19, to which a contact pin 11 is fixed.
  • the contact pin 11 is rotatably journalled in the bracket 16, partly through a contact needle bearing of the embodiment described with reference to Figure 1, partly through a sliding bearing in the form of a sleeve 20 of, for example, polytetrafluoro ethylene.
  • the pin 11 is fixed axially in the bracket 16 by means of a washer 21 and a locking ring 22.
  • the manufacture of the bracket 16 may, for example, be performed by chill casting of aluminium.
  • the fixing of the contact sleeve 10 to the bracket 16 may then be achieved by embedment in the same work operation as that in which the bracket is manufactured.
  • the current transfer between the pin 11 and the sleeve 10 is achieved with the aid of thirty-six relatively long, thin rollers 13, so-called needles, of resilient contact material, for example beryllium copper or chromium-zirconium copper. Because the pin 11 and the sleeve 10 are formed with radially outwardly and inwardly projecting annular elevations 14 and 15, respectively, the contact needles 13 will be strained in wave form, thus providing the necessary contact pressure at the contact points.
  • Figures 4-6 show a roller holder 23 made of insulating material, the task of which is to distribute the contact needles 13 evenly spaced from each other around the periphery of the contact pin 11 and to prevent them from contacting each other.
  • the holder 23 has the shape of a cylindrical cage with thirtysix slots adapted to the contact needles 13, the slots extending between an upper and a lower end ring 25 and 26, respectively.
  • the invention is not limited to the embodiment shown, but may be applied in a plurality of ways within the scope of the claims.
  • the sliding bearing 20 shown is not absolutely necessary, but the contact needles 13 may in many cases serve alone as both bearing and current-transfer members.
  • the field of use of the invention is not limited to disconnectors, but the invention is also advantageous in many other applications, where there is a need of rotatable contact connections.

Landscapes

  • Multi-Conductor Connections (AREA)
  • Contacts (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP19950110789 1994-07-12 1995-07-11 Connexion rotative à contact électrique Expired - Lifetime EP0692844B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9402452A SE503599C2 (sv) 1994-07-12 1994-07-12 Kontaktförbindning mellan två relativt varandra vridbara ledare
SE9402452 1994-07-12

Publications (2)

Publication Number Publication Date
EP0692844A1 true EP0692844A1 (fr) 1996-01-17
EP0692844B1 EP0692844B1 (fr) 1999-05-12

Family

ID=20394702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950110789 Expired - Lifetime EP0692844B1 (fr) 1994-07-12 1995-07-11 Connexion rotative à contact électrique

Country Status (3)

Country Link
EP (1) EP0692844B1 (fr)
DE (1) DE69509592T2 (fr)
SE (1) SE503599C2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE406132B (sv) * 1974-06-04 1979-01-22 Sprecher & Schuh Ag Elektrisk rullkontaktanordning
US4786262A (en) * 1987-02-16 1988-11-22 Otto Dunkel Gmbh Fabrik Fur Elektrotechnische Gerate Electrical contact device
US5036583A (en) * 1989-05-12 1991-08-06 Otto Dunkel Gmbh Process for making contact pin - contact bushing structural unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE406132B (sv) * 1974-06-04 1979-01-22 Sprecher & Schuh Ag Elektrisk rullkontaktanordning
US4786262A (en) * 1987-02-16 1988-11-22 Otto Dunkel Gmbh Fabrik Fur Elektrotechnische Gerate Electrical contact device
US5036583A (en) * 1989-05-12 1991-08-06 Otto Dunkel Gmbh Process for making contact pin - contact bushing structural unit

Also Published As

Publication number Publication date
SE9402452D0 (sv) 1994-07-12
SE9402452L (sv) 1996-01-13
EP0692844B1 (fr) 1999-05-12
DE69509592T2 (de) 1999-11-18
SE503599C2 (sv) 1996-07-15
DE69509592D1 (de) 1999-06-17

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