WO2023134808A1 - Dispositif d'alignement des segments d'un anneau de stator, procédé d'alignement des segments d'un anneau de stator et procédé d'installation d'un anneau de stator - Google Patents

Dispositif d'alignement des segments d'un anneau de stator, procédé d'alignement des segments d'un anneau de stator et procédé d'installation d'un anneau de stator Download PDF

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Publication number
WO2023134808A1
WO2023134808A1 PCT/DE2022/100911 DE2022100911W WO2023134808A1 WO 2023134808 A1 WO2023134808 A1 WO 2023134808A1 DE 2022100911 W DE2022100911 W DE 2022100911W WO 2023134808 A1 WO2023134808 A1 WO 2023134808A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
ring segments
segments
central axis
stator
Prior art date
Application number
PCT/DE2022/100911
Other languages
German (de)
English (en)
Inventor
Carl Enning
Manfred Rieger
Felipe MARCONDES DE OLIVEIRA
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2023134808A1 publication Critical patent/WO2023134808A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/022—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with salient poles or claw-shaped poles

Definitions

  • the invention relates to a device for aligning ring segments of a stator ring for an electrical machine. Furthermore, the invention relates to a method for aligning ring segments of a stator ring for an electrical machine. Furthermore, the invention relates to a method for assembling a stator ring for an electrical machine.
  • the invention can be used in the manufacture of electrical machines with a single-tooth winding.
  • Electrical machines of this type usually have a large number of individual teeth which are designed in the manner of ring segments and are assembled to form a stator ring.
  • the individual ring segments are usually pushed radially inwards at their outer diameter sections until they come into contact at their tooth flanks.
  • the ring segments aligned in this way are then typically joined to a stator carrier as a stator ring.
  • the object is achieved by a device for aligning ring segments of a stator ring for an electrical machine, with a plurality of actuators for pressing each of the ring segments on an outer diameter section by an actuator in each case along a path of movement radially in the direction of a central axis of the stator ring, and with a plurality of concentrically around the Alignment elements arranged on the central axis, which are in a direction parallel to the central axis are movable in such a way that they are at least partially positionable between the movement paths of the ring segments.
  • each ring segment is pressed by one actuator.
  • the actuators press the ring segments radially inwards at their outer diameter sections towards the central axis of the stator ring.
  • the alignment elements ensure guidance during the movement of the ring segments along predetermined movement paths. In particular, the alignment elements prevent—at least partially—an undesired rotation of the ring segments about an axis perpendicular to the respective movement path.
  • the alignment elements are moved in a direction parallel to the central axis until they are at least partially positioned between the individual ring segments.
  • the ring segments can be brought into contact with the alignment elements by pressing the actuators.
  • the ring segments can slide radially inwards under the guidance of the alignment elements, in particular without twisting.
  • the stator ring manufactured using the device according to the invention can provide a uniform air gap to the rotor and thus ensure a higher degree of efficiency of the electrical machine. In this way, an increased power output of the electrical machine is possible.
  • the alignment elements have at least partially plate-shaped guide sections, wherein the guide sections can be positioned at least partly between the movement paths of the ring segments.
  • a plate-shaped or planar design can make it particularly easy for the ring segments to slide along the alignment elements.
  • the plate-shaped guide sections have two main directions of extent, with the main directions of extent being arranged radially and axially with respect to the central axis.
  • the flat, plate-shaped design of the guide sections with radial and axial expansion can ensure simple delivery and positioning of the guide sections in the area between the ring segments and at the same time enable the ring segments to be guided in the radial direction.
  • the alignment elements are preferably arranged on a common base body, in particular on the same side of the common base body. By arranging the alignment elements on a common base body, which can be referred to as an infeed unit, the alignment elements can be moved synchronously. A concept and its implementation for the timing of the axial movement of the individual alignment elements can be omitted.
  • the base body can be actuated electrically or pneumatically.
  • the base body can have a drive unit for the axial movement of the base body and, as a result, for the positioning of the alignment elements between the ring segments, it being possible for the drive unit to be driven electrically or pneumatically.
  • An advantageous embodiment of the invention provides an expanding mandrel with a variable outer diameter, the ring segments having inner diameter sections along which they can be guided on the outer diameter of the expanding mandrel. While the ring segments are pushed radially inwards by the actuators at their outer diameter sections, their inner diameter sections can be arranged on a common circular circumference corresponding to an outer diameter of the expanding mandrel. The ring segments can be aligned more precisely to a desired circular arrangement as a result of the guidance by means of the expanding mandrel.
  • the stator ring manufactured using the expanding mandrel according to the invention can provide a uniform air gap to the rotor and thus ensure a higher degree of efficiency of the electrical machine. In this way, an increased power output of the electrical machine is possible.
  • the expanding mandrel comprises an at least partially conical element and a plurality of expanding mandrel segments which can be moved radially through the conical element and form the outside diameter of the expanding mandrel in order to change its outer diameter.
  • the expanding mandrel segments can be pressed radially in the direction of the central axis and thus against the at least partially conical element by spring elements in order to ensure constant contact between the expanding mandrel segments and the at least partially conical element.
  • the entirety of the expanding mandrel segments can have a conical recess along the central axis that corresponds to the outer diameter of the at least partially conical element.
  • the expanding mandrel segments can be designed at least partially in the shape of a circular cylinder in order to provide a contact surface for the inner diameter sections of the ring segments of the stator ring.
  • Another object of the invention is a method for aligning ring segments of a stator ring for an electrical machine, wherein a device has a plurality of alignment elements arranged concentrically around a central axis and can be moved along the central axis in such a way that the alignment elements can be positioned at least partially between the ring segments, wherein , in a feeding step, the alignment elements are moved along the central axis in such a way that they are at least partially positioned between the ring segments, wherein, in a guiding step subsequent to the feeding step, the ring segments are moved radially towards the central axis by actuators, the ring segments are at least partially guided and aligned by the alignment elements during the guiding step, wherein, in a lifting step following the guiding step, the alignment elements are moved along the central axis and counter to the direction moved in the feeding step, wherein during the lifting step the alignment elements are moved out of the area between the ring segments again be removed completely.
  • the stator ring manufactured using the method according to the invention can provide a uniform air gap to the rotor and thus ensure a higher efficiency of the electrical machine. In this way, an increased power output of the electrical machine is possible.
  • the expanding mandrel in particular the at least partially conical element together with the expanding mandrel segments, is moved parallel to the central axis in a release step following the lifting step in order to release a space formed between the inner diameter sections of the ring segments of the aligned stator ring.
  • the expanding mandrel can be moved along the central axis together with the at least partially conical element and the expanding mandrel segments so the assembled stator ring can be released.
  • a method for aligning ring segments can be terminated by the release step.
  • a subsequent method for aligning ring segments can be started. With the completion of the release step, the expanding mandrel is in a release position, as it were in a standby mode.
  • Another object of the invention is a method for assembling a stator ring for an electrical machine from a plurality of ring segments, the ring segments of the stator ring being aligned in accordance with one of the above-described methods for aligning ring segments in an alignment step, and the ring segments being joined in a joining step following the alignment step , In particular non-positively, are joined to the stator ring.
  • the aligned ring segments can be joined to form a stator ring, for example, by introducing the aligned ring segments into a receptacle in a stator carrier, the stator carrier having an inner wall against which the outer diameter sections of the ring segments rest.
  • the ring segments can be pressed into the seat of the stator carrier.
  • the seat of the stator carrier can be preheated and the ring segments can be inserted into the preheated seat.
  • the receptacle that has been preheated in this way can deform slightly when it is inserted and/or adapt to the outer contour of the ring segments aligned with the stator ring. After the ring segments have been introduced, the receptacle can cool down and thereby positively connect the ring segments to one another.
  • FIG. 1 shows an exploded drawing of components of an electrical machine
  • FIG. 2 shows an exemplary ring segment of a stator ring in a plan view
  • FIG. 3 shows a perspective view of a stator ring
  • FIG. 4 is a plan view of a plurality of ring segments of a stator ring wherein there is misalignment of the ring segments caused by twisting of a ring segment; 5 shows an exemplary embodiment of a device according to the invention with alignment elements on a base body in a perspective view;
  • FIG. 6 shows an exemplary embodiment of a device according to the invention with alignment elements, the guide sections of which are positioned between ring segments of a stator ring, in a perspective representation;
  • FIG. 8 shows a schematic representation of the guidance of ring segments on an outer diameter of an expanding mandrel
  • FIG. 9 shows a sectional illustration of a device for aligning ring segments of a stator ring according to an exemplary embodiment of the invention.
  • 10a shows a schematic representation of the stator ring and two actuators in a plan view
  • FIG. 10b shows a schematic representation of detail A from FIG. 10a; FIG. and
  • FIG. 11 shows a sectional view of the device according to FIG. 9, the expanding mandrel being in a release position.
  • the representation in FIG. 1 shows individual parts of a stator of an electrical machine 100 in an exploded representation.
  • the stator of the electrical machine 100 includes a stator ring 20 which is constructed from a plurality of ring segments 10 designed as stator teeth.
  • the stator ring 20 has a single-tooth winding.
  • the ring segments 10 each include an I-shaped core segment 16 and a coil 18.
  • insulation can be present, which is arranged in particular between the core segment 16 and the coil 18 and or between the coils 18 of adjacent ring segments.
  • stator support 21 is shown in the exploded view of FIG.
  • the stator carrier 21 has a receptacle into which the stator ring 20 is inserted in order to maintain the shape of the stator ring 20 and to ensure mechanical stability.
  • a housing cover 23 protects the stator ring 20 at least partially against environmental influences such as the ingress of moisture or dust.
  • the core segment 16 of the ring segment 10 has the coil 18 wound around it.
  • the coil 18 can be formed from a copper wire, for example, encased with an insulating lacquer, for example, which prevents a short circuit between individual turns of the coil 18 .
  • the representation in FIG. 2 also shows that the ring segment 10 has a plurality of projections 15 . The two ends of the coil 18 are each hung on one of the projections 15 for better attachment to the core segment 16 .
  • the tooth flanks 17 of the core segment 18 are designed as flat surfaces. Alternatively, provision can be made for the tooth flanks 17 to have connecting elements which come into contact with one another when the tooth flanks 17 of two adjacent core segments 16 come into contact. For example, connecting elements can be provided on the tooth flanks 17 in the manner of a tongue and groove connection.
  • FIG. 3 shows a stator ring 20 as can be obtained by the method according to the invention for aligning ring segments 10 .
  • the stator ring 20 comprises 36 ring segments 10 each having a core segment 16 , a coil 18 and an insulation 19 .
  • the ring segments 10 pushed radially inwards at their outer diameter sections 14 during an alignment step are in contact with one another after the alignment step has ended.
  • the ring segments 10 guided on the inner diameter sections 12 during the alignment step form at least largely a circular shape on their inner diameter sections 12 after the end of the alignment step. All of the ends of the coils 18 are directed upwards in order to facilitate the connection of the stator ring 20 to the stator support 21 downstream in time.
  • stator ring 20 For connection to the stator support 21, the stator ring 20 is guided from top to bottom and inserted into the stator support 21, the stator support 21 being able to be preheated--in particular inductively.
  • FIG. 4 A detail from a stator ring 20 can be seen in FIG. 4 .
  • Three visible ring segments 10 are in contact with one another at their tooth flanks 17 in the circumferential direction, with each ring segment 10 comprising a core segment 16 and a coil 18 .
  • a misalignment of the ring segment 10 that is completely visible in the top view in FIG. For this reason, the outer diameter sections 14 of the adjacent ring segments 10 do not merge smoothly into one another.
  • the alignment elements 3 are arranged on a base body 7 which is rotationally symmetrical here, with all alignment elements 3 being provided on one side of the base body 7 .
  • All alignment elements 3 have a guide section 5 which is plate-shaped and protrudes at least partially over one end of the base body 7 .
  • the guide sections 5 mainly extend in a radial and axial direction with respect to a vertical vertical axis H in FIG. 5 , which is arranged parallel to a central axis M of the stator ring 20 .
  • the wall thickness of the guide sections 5, i.e. their thickness in the circumferential direction, is relatively small in relation to the radial and axial dimensions.
  • the base body 7 includes a drive unit that can move it downward—parallel to the vertical axis H—in the context of a feeding step with respect to FIG.
  • actuators 30 are arranged concentrically around the vertical axis H or central axis M, which can move the ring segments 10 (not shown in FIG. 5 ) radially inward and perpendicular to the central axis M.
  • the guide sections 5 can be positioned between the ring segments 10 by moving the base body 7 downwards. 6 shows the guide sections 5 after a feeding step.
  • the base body 7 has been controlled downwards and the guide sections 5 have been positioned at least partially between the ring segments 10 .
  • FIG. 7a shows FIG. 6 in a sectional representation.
  • the guide sections 5 are at least partially positioned between the ring segments 10 .
  • the tooth flanks 17 of the respective ring segments 10 and the guide sections 5 are spaced apart from one another.
  • the ring segments 10 are pushed radially inwards by the actuators 30 along a respective movement path.
  • the arrangement after the guiding step is shown in FIG. 7b.
  • the respective spacing of the ring segments 10 or their tooth flanks 17 has decreased in the circumferential direction due to the displacement of the ring segments 10 along their movement paths B.
  • a lifting step follows the guide step.
  • the base body 7 together with the alignment elements 3 or the guide sections 5 is lifted against the direction of movement in the course of the feeding step, i.e. it is moved up along the vertical axis H according to FIG. In this way, the space between the ring segments 10 is released again.
  • the inner diameter sections 12 of the ring segments 10 are already in contact with an outer diameter of the expanding mandrel 40, with the aid of which the alignment of the ring segments 10 is continued.
  • FIG. 8 the alignment step is shown schematically.
  • An electric or pneumatic actuator 30 is assigned to each ring segment 10 .
  • the actuators 30 push the ring segment 10 assigned to them radially inwards on its outer diameter section 14, i.e. perpendicularly to the central axis M. While the actuators 30 push the ring segments 10, the ring segments 10 rest on their inner diameter sections 12 against a variable outer diameter of the expanding mandrel 40 .
  • the expanding mandrel 40 comprises an at least partially conical element 44 which is mounted so that it can move along the central axis M, and a plurality of expanding mandrel segments 46 which are each mounted so that they can move radially, ie perpendicularly to the central axis M.
  • FIG. 9 shows an exemplary embodiment of a device for aligning ring segments 10 of the stator ring 20 without the base body 7 and the alignment elements 3 in a sectional view.
  • the device can also be referred to as an alignment or rounding station and has an expanding mandrel 40 with a variable outer diameter.
  • This expanding mandrel 40 comprises an at least partially conical element 44 and a plurality of expanding mandrel segments 46.
  • the expanding mandrel segments 46 bear with a beveled inner side on the outside of the conical region of the element 44 and are prestressed by spring elements 48 in the radial direction against the partially conical element 44.
  • the expanding mandrel segments 46 move in the radial direction.
  • the expanding mandrel segments 46 are each moved inward in the radial direction by the spring elements 48 when the at least partially conical element 44 is moved downwards, so that the outer diameter of the expanding mandrel 40 is reduced.
  • the outer diameter of the expanding mandrel 40 increases when the at least partially conical element 44 moves upwards, with the expanding mandrel segments 46 being moved radially outwards against the spring force of the spring elements 48 .
  • stator ring 20 is arranged concentrically around the expanding mandrel 40 and lies against the expanding mandrel segments 46, with actuating arms of the actuators 30 each pressing on an outer diameter section 14 of the ring segments 10 of the stator ring 20.
  • FIG. 10a and 10b the stator ring 20 and two actuators 30 are shown schematically in a plan view.
  • the respective coils 18 wound around the core segments 16 are not shown in Figure 10b for the sake of clarity.
  • 10b shows two I-shaped core segments 16 as an example, which are pushed over their outer diameter sections 14 by an actuator 30 each after the alignment elements 3 have been completely removed from the area between the ring segments 10 again.
  • the core segments 16 rest at their inner diameter sections 12 on the variable outer diameter of the expanding mandrel 40 .
  • Figure 10b shows a snapshot taken during the alignment step. The moment is shown at which the tooth flanks 17 of two adjacent core segments 16 come into contact. This results in at least compressive forces in the contact surfaces.
  • the device for aligning ring segments 10 of the stator ring 20, already shown in Fig. 9, is shown in a release position, in which the expanding mandrel 40 is moved downwards in the direction of the central axis M in such a way that the area between the inner diameters of the ring segments 10, ie the interior of the stator ring 20, is released.
  • This release position is assumed after the stator ring 20 has been assembled from individual ring segments 10 . In this release position, the stator ring 20 can be picked up by a gripping device and fed to further processing.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un dispositif (1) pour aligner les segments d'anneau (10) d'un anneau de stator (20) pour une machine électrique (100), comprenant plusieurs actionneurs (30) pour presser radialement contre une section de diamètre extérieur (14) de chaque segment annulaire (10) le long d'une trajectoire de mouvement (B) en direction d'un axe central (M) de l'anneau de stator (20) au moyen d'un actionneur respectif (30) et comprenant plusieurs éléments d'alignement (3) qui sont disposés concentriquement autour de l'axe central (M) et qui peuvent être déplacés dans une direction qui est parallèle à l'axe central (M) de sorte que les éléments d'alignement peuvent être positionnés au moins en partie entre les trajectoires de mouvement (B) des segments annulaires (10).
PCT/DE2022/100911 2022-01-17 2022-12-06 Dispositif d'alignement des segments d'un anneau de stator, procédé d'alignement des segments d'un anneau de stator et procédé d'installation d'un anneau de stator WO2023134808A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022100900.9A DE102022100900A1 (de) 2022-01-17 2022-01-17 Vorrichtung zum Ausrichten von Ringsegmenten eines Statorrings, Verfahren zum Ausrichten von Ringsegmenten eines Statorrings, Verfahren zur Montage eines Statorrings
DE102022100900.9 2022-01-17

Publications (1)

Publication Number Publication Date
WO2023134808A1 true WO2023134808A1 (fr) 2023-07-20

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PCT/DE2022/100911 WO2023134808A1 (fr) 2022-01-17 2022-12-06 Dispositif d'alignement des segments d'un anneau de stator, procédé d'alignement des segments d'un anneau de stator et procédé d'installation d'un anneau de stator

Country Status (2)

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DE (1) DE102022100900A1 (fr)
WO (1) WO2023134808A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310545A (en) * 1996-02-22 1997-08-27 Honda Motor Co Ltd Stator core and method and apparatus for assembling same
JP2000041364A (ja) * 1998-07-22 2000-02-08 Honda Motor Co Ltd ステータコアの組立装置
US20100018039A1 (en) * 2008-07-22 2010-01-28 Fujitsu Limited Filter, duplexer and communication apparatus
JP2010028995A (ja) * 2008-07-22 2010-02-04 Honda Motor Co Ltd ステータ製造装置
JP2014187840A (ja) * 2013-03-25 2014-10-02 Aisin Aw Co Ltd 固定子コア製造方法
DE102014213595A1 (de) * 2014-07-14 2016-01-14 Schaeffler Technologies AG & Co. KG Vorrichtung und Verfahren zur Herstellung eines Stators einer elektrischen Maschine
EP3855606A1 (fr) * 2018-02-09 2021-07-28 Marsilli S.p.A. Appareil et procédé pour assembler les dents constituant les pôles de stator d'un stator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5277860B2 (ja) 2008-10-21 2013-08-28 トヨタ自動車株式会社 固定子コア製造方法、及び固定子コア製造装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310545A (en) * 1996-02-22 1997-08-27 Honda Motor Co Ltd Stator core and method and apparatus for assembling same
US20010004799A1 (en) * 1996-02-22 2001-06-28 Honda Giken Kogyo Kabushiki Kaisha Stator core and method and apparatus for assembling same
JP2000041364A (ja) * 1998-07-22 2000-02-08 Honda Motor Co Ltd ステータコアの組立装置
US20100018039A1 (en) * 2008-07-22 2010-01-28 Fujitsu Limited Filter, duplexer and communication apparatus
JP2010028995A (ja) * 2008-07-22 2010-02-04 Honda Motor Co Ltd ステータ製造装置
JP2014187840A (ja) * 2013-03-25 2014-10-02 Aisin Aw Co Ltd 固定子コア製造方法
DE102014213595A1 (de) * 2014-07-14 2016-01-14 Schaeffler Technologies AG & Co. KG Vorrichtung und Verfahren zur Herstellung eines Stators einer elektrischen Maschine
EP3855606A1 (fr) * 2018-02-09 2021-07-28 Marsilli S.p.A. Appareil et procédé pour assembler les dents constituant les pôles de stator d'un stator

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