EP0618648A1 - Verfahren zur Herstellung eines Läufers eines rotierenden elektrischen Kollektors - Google Patents

Verfahren zur Herstellung eines Läufers eines rotierenden elektrischen Kollektors Download PDF

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Publication number
EP0618648A1
EP0618648A1 EP94400657A EP94400657A EP0618648A1 EP 0618648 A1 EP0618648 A1 EP 0618648A1 EP 94400657 A EP94400657 A EP 94400657A EP 94400657 A EP94400657 A EP 94400657A EP 0618648 A1 EP0618648 A1 EP 0618648A1
Authority
EP
European Patent Office
Prior art keywords
blank
resin
plates
tubular part
parts
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
EP94400657A
Other languages
English (en)
French (fr)
Other versions
EP0618648B1 (de
Inventor
Bernard Blanchard
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.)
Everaxis Aerospace and Defence SAS
Original Assignee
Air Precision SA
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 Air Precision SA filed Critical Air Precision SA
Publication of EP0618648A1 publication Critical patent/EP0618648A1/de
Application granted granted Critical
Publication of EP0618648B1 publication Critical patent/EP0618648B1/de
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
    • H01R39/08—Slip-rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/10—Manufacture of slip-rings

Definitions

  • the invention relates to a method for manufacturing the rotor of a rotating electrical collector.
  • Rotating electrical collectors are devices which allow several electrical signals to be transmitted simultaneously between a fixed part, or stator, and a mobile part or rotor. Such devices are used in many industrial sectors, among which, by way of example only, are machine tools, air, naval and land transport, etc.
  • the rotor of a rotating electrical collector comprises a number of electrically conductive rings equal to the number of electrical signals which the device must transmit. These electrically conductive rings are arranged coaxially on an electrically insulating axis and separated from each other by an electrically insulating material.
  • the stator of the rotating electrical collectors generally comprises, opposite each of the electrically conductive rings, at least two brushes such as electrically conductive wires permanently rubbing against the rings. V-shaped grooves can be machined on the electrically conductive rings to guide the brushes.
  • the traditional manufacturing technique of the rotor of a rotating electrical collector consists in mounting, on a hollow or solid axis made of an electrically insulating material, a stack formed alternately of electrically conductive rings and electrically insulating rings. This stack is blocked by means of a stop ring fixed on the axis, for example by gluing.
  • the electrical connections are provided by electrical conductors which run inside the axis and are welded to each of the electrically conductive rings at their ends.
  • this technique of manufacturing by pressure molding has the advantages of being less expensive and allowing the manufacture of rotors of any size.
  • inserts can be introduced during molding, in particular to facilitate the mechanical connection of the rotor to the adjacent parts.
  • the subject of the invention is precisely a new method for manufacturing the rotor of a rotating electrical collector using a resin initially in the liquid state but without requiring the presence of a mold, so as to take advantage of the advantages provided by the known manufacturing technique using pressure molding, while being less expensive and allowing more precise sizing.
  • centrifugal force makes it possible to distribute the resin uniformly inside the blank of slip rings.
  • employment a blank with an outer tubular portion without perforation prevents the escape of the resin during centrifugation.
  • the subsequent elimination of this external tubular part, after hardening of the resin, makes it possible to obtain the rotor directly.
  • the blank is obtained by stacking several pieces each comprising a section of the outer tubular part and one of the parts forming a ring.
  • each of these parts has substantially in section the shape of an L, the two branches of which respectively constitute said section and said ring-forming part.
  • the latter is placed between two plates, at least one of which has an orifice for introducing the liquid resin.
  • the faces of these plates facing towards the blank are then complementary to the faces ends of the latter, so as to ensure self-centering of the blank between the plates.
  • the plates are fixed on a shaft which is rotated at substantially constant speed using a motor.
  • the thermal curing cycle of the resin is applied by placing the assembly comprising the blank, the plates and the shaft in an enclosure with controlled atmosphere.
  • an electrical conductor is welded inside each of the ring-forming parts.
  • a blank 10 of slip rings is produced, made of an electrically conductive material, such as copper, etc.
  • the blank 10 comprises an external tubular part 14 without perforation and parts 12 forming rings, which project radially inwards from the external tubular part 14.
  • the parts 12 forming rings are spaced from each other. They are intended to constitute the electrically conductive rings of the rotor.
  • the outer tubular part 14 serves both to maintain the desired spacing between the parts 12 forming the rings and to prevent the resin from escaping to the outside during centrifugation. It will be removed at a later stage of manufacturing, so it will not be part of the rotor.
  • FIG. 1 represents a blank 10 the parts of which form the rings 12 all have the same thickness and are separated from each other by identical distances, the thicknesses of the parts 12 forming the rings as well as their spacing can take any values and in particular different over the length of the blank 10, without departing from the scope of the invention.
  • the blank 10 for slip rings is formed by a stack of pieces 16 which all have a substantially L-shaped cross section.
  • Each of these pieces 16 includes one of the parts 12 forming rings, as well as a section of the outer tubular part 14. More precisely, each of the parts forming rings 12 projects radially towards the inside of the blank 10 from one end of the corresponding section of the part tubular 14.
  • the sections of the tubular part 14 of the blank 10, formed in each of the parts 16, all have the same thickness and the same internal and external diameters.
  • the different parts forming rings 12 all have the same internal diameter.
  • the blank 10 has a symmetry of revolution about its longitudinal axis when the parts 16 are stacked in a coaxial manner as illustrated in FIG. 1.
  • each of these parts 16 formed on the part 12 forming the ring of this part comprises on its outer periphery a recessed part 18.
  • the end of the section of the outer tubular part 14 which is in contact with this end face is complementary to the recessed part 18, so that it fits there, as illustrated in FIG. 1, so as to achieve self-centering longed for.
  • the blank 10 for slip rings can be produced in a manner different from that which has just been described.
  • this blank can in particular be produced in one piece by machining or by stacking pieces having in section substantially the shape of a T.
  • an electrical conductor 20 is welded to the inner peripheral surface of each of the parts 12 forming rings.
  • the electrical conductors 20 are intended to ensure the transmission of electrical signals between the electrically conductive rings of the rotor and external electrical circuits or systems rotating with this rotor.
  • the blank 10 of slip rings is mounted in a tool making it possible to partially fill it with resin, to rotate it around its axis to centrifuge the resin and to subject the latter to an appropriate thermal cycle. .
  • the part of the tool making it possible to fill the blank 10 partially with resin and to ensure its centrifugation comprises first of all two plates 22 in the form of circular disks, which are placed on the ends of the 'blank 10. These plates 22 make it possible to keep the various parts 16 of the blank in contact and to partially close the space 24 delimited inside the latter, at least in the peripheral zone adjacent to the blank 10.
  • the faces of the plates 22 turned towards the end faces of the blank 10 have shapes complementary to those of these end faces, so that the plates 22 are automatically centered on the draft.
  • One of the plates 22 has, near its axis, an orifice 26 for introducing liquid resin.
  • an orifice 26 for introducing liquid resin.
  • a shaft 30 is introduced into a circular passage formed in the center of each of the plates 22.
  • a shoulder 32 formed on the shaft 30 abuts against the outer face of one of the plates 22.
  • a screwed nut 34 on a thread 36 formed at the opposite end of the shaft 30 is supported on the outer face of the other plate 22 to ensure the desired blocking.
  • keys 35 can be interposed between the shaft 30 and each of the plates 22 to secure these rotating members.
  • the resin 28 is introduced in the liquid state into the interior space 24 through the introduction orifice 26.
  • This introduction can be done manually or in an automated manner. It is important to observe that the volume of liquid resin 28 introduced into the interior space 24 is precisely determined so that the finished rotor has the desired interior diameter.
  • the shaft 30 is fixed coaxially to the output shaft of a motor 38 such as an electric motor of any kind, capable of driving the shaft 30 in rotation, the plates 22 , the blank 10 as well as the liquid resin 28.
  • the shaft 30 can be made in one piece as shown schematically in Figure 1 or, preferably, in two removable sections respectively forming the shaft motor outlet 38 and the blocking shaft of the blank 10 between the plates 22.
  • the assembly thus formed is mounted on a support illustrated diagrammatically at 40 in FIG. 1, for example in order to give the axis of the shaft 30 a substantially horizontal orientation.
  • This support 40 is itself placed inside an enclosure 42 with a controlled atmosphere, such as an autoclave, making it possible to apply the resin 28 the thermal curing cycle recommended by its manufacturer.
  • the resin 28 may be a thermosetting resin such as an epoxy resin or a resin of any other type whose hardening can be obtained by applying a predetermined temperature cycle to it.
  • the resin 28 contained in the blank 16 is centrifuged and the thermal curing cycle of this resin is applied simultaneously.
  • the motor 38 is activated to rotate the shaft 30, the plates 22, the blank 10 and the resin 28 at substantially constant speed, as illustrated by arrow F.
  • the speed of rotation is determined as a function of the diameter of the blank 10, so that a sufficient centrifugal force is applied to the resin 28 so that this resin is distributed homogeneously over the entire inner circumference of the blank 10.
  • This rotation at a substantially constant speed controlled by the motor 38 continues throughout the duration of the application of the thermal cycle such as a polymerization cycle allowing the resin 28 to harden inside the blank 10.
  • the electrical conductors 20 When mounting the blank 10 between the plates 22, the electrical conductors 20 are placed in the position which it is desired to obtain on the rotor in progress Manufacturing. This position can be such that the conductors are embedded in the resin 28 inside the rotor and exit from the latter by an end face as illustrated in the figures. It is also possible to arrange each of the electrical conductors 20 so that they exit radially inside the resin 28, then pass through the hollowed-out central part of the rotor. In both cases, the electrical conductors 20 pass through passages provided for this purpose in one of the plates 22.
  • the assembly constituted by the blank 10 of slip rings and by the resin 28 forms a rigid annular block 43 such that illustrated in FIG. 2.
  • the solidified resin 28 fills the spaces formed between the ring-forming parts 12 and forms, inside these parts 12, a hollow shaft whose internal diameter is uniform and depends, as as we have seen, of the quantity of liquid resin initially introduced into the interior space 24.
  • the external tubular part 14 of the blank 10 is then removed, preferably by machining, in order to obtain electrically conductive rings 12a isolated from each other. others by resin 28.
  • at least one guide groove 46 with a V-shaped section is machined on the outer surface of each of the rings 12a, in which the electrically conductive brushes of the stator will be placed.
  • a protective material can be deposited on the periphery of each of the electrically conductive rings 12a, according to a known technique.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP19940400657 1993-03-30 1994-03-28 Verfahren zur Herstellung eines Läufers eines rotierenden elektrischen Kollektors Expired - Lifetime EP0618648B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9303669 1993-03-30
FR9303669A FR2703523B1 (fr) 1993-03-30 1993-03-30 Procede de fabrication d'un rotor de collecteur electrique tournant.

Publications (2)

Publication Number Publication Date
EP0618648A1 true EP0618648A1 (de) 1994-10-05
EP0618648B1 EP0618648B1 (de) 1997-03-05

Family

ID=9445503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940400657 Expired - Lifetime EP0618648B1 (de) 1993-03-30 1994-03-28 Verfahren zur Herstellung eines Läufers eines rotierenden elektrischen Kollektors

Country Status (3)

Country Link
EP (1) EP0618648B1 (de)
DE (2) DE618648T1 (de)
FR (1) FR2703523B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0977326A1 (de) * 1998-07-31 2000-02-02 Litton Systems Schleifringanordnung mit integrierter Lagervorrichtung und dessen Herstellungsverfahren
EP1482604A2 (de) 2003-05-30 2004-12-01 LTN Servotechnik GmbH Schleifringelement und Verfahren zu dessen Herstellung
CN102412449A (zh) * 2011-12-29 2012-04-11 仝志红 一种电连接器
CN103050854A (zh) * 2012-12-19 2013-04-17 许杭旭 新型集电环
EP3316425A1 (de) * 2016-10-25 2018-05-02 Schleifring GmbH Schleifringmodul
CN109888986A (zh) * 2019-03-19 2019-06-14 湖南农业大学 一种液电气混合动力转子装置
EP3740382B1 (de) 2018-01-16 2022-05-25 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Verfahren zur herstellung einer elektromechanischen 3d-komponente mit mindestens einem eingebetteten elektrischen leiter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094867B (de) * 1955-10-10 1960-12-15 Siemens Schuckertwerke Gmbh Verfahren zur Herstellung eines Schleifringkoerpers fuer elektrische Maschinen od. dgl.
DE1926219A1 (de) * 1969-05-22 1970-11-26 Teldix Gmbh Verfahren zur Herstellung eines Schleifringkoerpers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094867B (de) * 1955-10-10 1960-12-15 Siemens Schuckertwerke Gmbh Verfahren zur Herstellung eines Schleifringkoerpers fuer elektrische Maschinen od. dgl.
DE1926219A1 (de) * 1969-05-22 1970-11-26 Teldix Gmbh Verfahren zur Herstellung eines Schleifringkoerpers

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6283638B1 (en) 1998-07-31 2001-09-04 Litton Systems, Inc. Slip ring with integral bearing assembly and method of manufacture
EP0977326A1 (de) * 1998-07-31 2000-02-02 Litton Systems Schleifringanordnung mit integrierter Lagervorrichtung und dessen Herstellungsverfahren
EP1482604A2 (de) 2003-05-30 2004-12-01 LTN Servotechnik GmbH Schleifringelement und Verfahren zu dessen Herstellung
US7307367B2 (en) 2003-05-30 2007-12-11 Ltn Servotechnik Gmbh Slip-ring element and method for its manufacture
EP1482604A3 (de) * 2003-05-30 2008-06-04 LTN Servotechnik GmbH Schleifringelement und Verfahren zu dessen Herstellung
CN102412449B (zh) * 2011-12-29 2013-10-09 王日新 一种电连接器
CN102412449A (zh) * 2011-12-29 2012-04-11 仝志红 一种电连接器
CN103050854A (zh) * 2012-12-19 2013-04-17 许杭旭 新型集电环
CN103050854B (zh) * 2012-12-19 2015-06-17 许杭旭 新型集电环
EP3316425A1 (de) * 2016-10-25 2018-05-02 Schleifring GmbH Schleifringmodul
WO2018077970A1 (en) * 2016-10-25 2018-05-03 Schleifring Gmbh Slip ring module
US11217952B2 (en) 2016-10-25 2022-01-04 Schleifring Gmbh Slip ring module
EP3740382B1 (de) 2018-01-16 2022-05-25 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Verfahren zur herstellung einer elektromechanischen 3d-komponente mit mindestens einem eingebetteten elektrischen leiter
CN109888986A (zh) * 2019-03-19 2019-06-14 湖南农业大学 一种液电气混合动力转子装置
CN109888986B (zh) * 2019-03-19 2021-01-29 苏州萨伯工业设计有限公司 一种液电气混合动力转子装置

Also Published As

Publication number Publication date
DE618648T1 (de) 1995-06-14
DE69401828D1 (de) 1997-04-10
DE69401828T2 (de) 1997-09-04
FR2703523B1 (fr) 1995-06-09
FR2703523A1 (fr) 1994-10-07
EP0618648B1 (de) 1997-03-05

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