WO2014108276A2 - Système pour fermer des rainures - Google Patents

Système pour fermer des rainures Download PDF

Info

Publication number
WO2014108276A2
WO2014108276A2 PCT/EP2013/076722 EP2013076722W WO2014108276A2 WO 2014108276 A2 WO2014108276 A2 WO 2014108276A2 EP 2013076722 W EP2013076722 W EP 2013076722W WO 2014108276 A2 WO2014108276 A2 WO 2014108276A2
Authority
WO
WIPO (PCT)
Prior art keywords
spring element
slot
wedge
longitudinal axis
closure arrangement
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.)
Ceased
Application number
PCT/EP2013/076722
Other languages
German (de)
English (en)
Other versions
WO2014108276A3 (fr
Inventor
Armin Piur
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 Schweiz AG
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of WO2014108276A2 publication Critical patent/WO2014108276A2/fr
Publication of WO2014108276A3 publication Critical patent/WO2014108276A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices

Definitions

  • the invention relates to a device for closing a filled with conductor bars or coils groove of an electric machine, and a device having this electrical see machine.
  • the electric machine both motors, as well as generators.
  • the idea of the invention essentially consists in designing the pressure piece to form a fully-fledged spring element whose spring travel is significantly greater in comparison to known solutions.
  • the slot closure arrangement for closing a slot filled with conductor bars or coils groove of an electric machine comprises a Nutenkeil and a pressure piece. Both the key wedge, as well as the pressure piece extend in the direction of a predetermined by their shape and / or the groove direction of the groove longitudinal axis.
  • the grooved wedge and the thrust piece are formed transversely to the longitudinal axis as wedge counter-wedge combination wedged against each other.
  • the pressure piece is designed as a spring element whose spring force can be activated by wedging the spring element against the Nutenkeil by means of a displacement of the spring element relative to the Nutenkeil in the direction of the longitudinal axis, in particular during the first insertion of the NutverBankan extract in the groove of the electric machine.
  • the spring element forms a bending beam arrangement in the direction of a transverse axis extending transversely to the longitudinal axis, so that the spring element can be deflected by the key in the direction of a vertical axis transverse to the longitudinal axis and transverse to the transverse axis, so that the spring element in the installed state of the slot closure arrangement in the direction the vertical axis can exert on the ladder bars or coils.
  • the bending beam arrangement advantageously extends in a single arc over a majority of the slot closure arrangement.
  • the spring element has a second surface facing away from the spline, which in the relaxed state of the spring element before installation in the electric machine in cross-section perpendicular to the longitudinal axis viewed at least in the region of the vertical axis extending in the direction of the longitudinal axis Has indentation.
  • the indentation ensures that the second surface during installation of the spring element in the groove of the electric machine has no full-surface support in the direction of the conductor bars or coils. Seen in cross-section transverse to the longitudinal axis can not be pressed through the non-solid surface so a portion of the spring element in the region of the vertical axis of Nutenkeil targeted against the recess in the direction of the conductor bars or coil, so that depending on the dimensions of the indentation considerable spring travel can be realized.
  • the spring element has a first surface facing the grooved wedge, which first surface in a relaxed state of the spring element before installation in the electric machine in a Cross-section seen perpendicular to the longitudinal axis, at least in the region of the vertical axis is convex.
  • the key wedge has a third surface facing the spring element, which third surface is concave in cross section perpendicular to the longitudinal axis.
  • a first radius of curvature of the first surface may be less than a third radius of curvature of the third surface, so that the key will compress during wedging the spring element exerts mainly in a transverse center area at the vertical axis.
  • the degree of the force to be applied during driving in the direction of the longitudinal axis in relation to the pressure force of the spring element resulting in the vertical axis can be kept within reasonable limits due to the different dimensioning of the radii of curvature. Good results can be achieved if the third radius of curvature is at least 5% larger than the first radius of curvature.
  • the groove wedge When the conductor bars or coils in the groove are to be cooled, the groove wedge have at least one ventilation slot extending in the direction of the vertical axis. If necessary, the ventilation slot can be arranged in the region of a wedge shoulder of the key be. If necessary, several ventilation slots can be arranged in the area of both wedge shoulders of the key.
  • the spring element of a slot closure arrangement has good spring properties when it comprises a plurality of electrically insulating fibers unidirectionally oriented in the direction of the transverse axis and interconnected by a heat-resistant resin.
  • the transverse axis and the vertical axis extend in an imaginary plane, which represents a cross section of the groove and the slot closure arrangement. A maximum spring travel is thus approximately transversely about a line in the direction of the vertical axis.
  • the strip-shaped spring element seen in the plan view from the direction of the vertical axis is easily configurable depending on the requirements with regard to the desired spring travel, the spring forces and the installation situation. Due to the producibility of larger spring travel of the spring element settling phenomena in the winding structure are better compensated. As a result, the intervals of the maintenance intervals can be increased and the availability of the electrical machine as a whole can be improved. The more reliable fastening of the windings as a result of the fatigue-resistant spring element contributes significantly to the fatigue strength of the groove closure in the groove and thereby makes a significant contribution to operational safety and to the reduction of potential damage.
  • the fibers should be electrically insulating.
  • Representatives of a large number of materials suitable for this purpose are, for example, glass fibers and / or para-amide fibers such as Kevlar.
  • the fiber composite can have from the fibers in the direction of the vertical axis abrasion-free or at least abrasion-resistant outer layers.
  • FIG. 1 is a cross-sectional view of a first embodiment of a slot closure assembly in the groove of an electric machine
  • FIG. 2 shows a cross-sectional view of a second embodiment of a slot closure arrangement in the groove of an electrical machine
  • FIG. 3 is a cross-sectional view of a spring element in the view of Figure 2
  • FIG. 4 is a side view, partly in section, of a keyway of the second embodiment
  • FIG. 5 is a plan view of the keyway according to the second embodiment.
  • FIG. 6 shows a side view with a partial section of a spring element according to the second embodiment.
  • FIG. 1 shows a slot closure arrangement 200 according to a first embodiment, wherein the reference numeral 1 denotes an upper prismatic body - in the following Nutenkeil called - and the reference numeral 2 a lower prismatic body - in the following pressure piece or its function called spring element.
  • Groove key 1 and thrust piece 2 press together one or more provided with an insulation 3 conductor bar or conductor bars 4 against the bottom of the punched in the stator lamination body 5 groove 6 of an electric machine by the wedge shoulders 29, 29 'of the Nutenkeils 1 against the complementary shaped recesses 7 in the stator lamination body 5 is supported.
  • the groove 6 has a classic dovetail shape.
  • the pressure piece Due to its function as a spring element, the pressure piece is henceforth called simplistic spring element 2.
  • the grooved wedge 1 Due to the electrical requirements of the grooved wedge 1 and also arranged between the conductor bar 4 and spring element 2 slide pad 10 is made of a laminate with glass fiber mats, mineral fillers and epoxy resin as a binder.
  • the grooved wedge 1 is more resistant to bending than the spring element 2 in the direction of the transverse axis 31.
  • the spring element 2 was not necessarily made of glass or Kevlar fibers which are oriented unilaterally in the direction of the transverse axis 31 and cast in heat-resistant resin, provided that required spring action can be achieved with other fiber-reinforced materials.
  • the spring element 2 has seen in the relaxed state of the spring element 2 before installation in the electric machine in cross section perpendicular to the longitudinal axis 30 at least in the region of the vertical axis 32 in the direction of the longitudinal axis 30 extending indentation 22, so that the second surface 9 during installation the spring element in the groove of the electric machine has no full-surface support in the direction of the conductor bars 4.
  • the spring element has on its side facing the Nutenkeil 1 a first surface 17, 17 ', which laterally of the vertical axis 32 has two graduated in height sections.
  • the offset in height produces a transversely arranged projection 12, which contacts the slot wedge 1 during installation of the slot closure arrangement in the electric machine, while the offset sections do not touch the slot wedge 1.
  • the distance between the first surface 17 'and an inner contour of the Nutenkeils 1 forms a first spring section 14th
  • a height of the indentation 22 extending in the direction of the vertical axis 32 forms a further, second spring section 15.
  • the spring element 2 forms in the direction of transverse to the longitudinal axis 30 extending transverse axis 31 a bending beam arrangement.
  • About the projection 12 is in wedging the spring element 2 against the Nutenkeil 1 acting in the direction of the vertical axis 32 against the conductor 4 compressive force applied to the spring element 2, wherein the pressure over those portions of the second surface which touch the sliding pad 10 in the latter is initiated.
  • FIG. 2 shows a slot closure arrangement 20 according to a second embodiment. Since the second embodiment is very similar to the first embodiment, reference will be made below only to the essential differences and their effect. Identical or equivalent elements have therefore been given the same reference signs.
  • the indentation 22 of the second surface 9 seen in cross section perpendicular to the longitudinal axis 30 has a concave shape.
  • the grooved wedge 1 has a spring surface 2 facing the third surface 8, which third surface 8 has seen in cross-section perpendicular to the longitudinal axis 30 has a concave shape.
  • the spring element 2 a the Nutenkeil 1 facing first surface 17, which first surface 17 in a relaxed state of the spring element prior to installation is seen in the electric machine in a cross section perpendicular to the longitudinal axis, at least in the region of the vertical axis 32 is convex.
  • the arcuate or Vietnamese-reinforced shape of the spring element 2 seen in cross-section perpendicular to the longitudinal axis 30 is particularly well suited to make the spring element as a fiber-reinforced component.
  • the electrically insulating spring element 20 has a multiplicity of electrically insulating fibers 19 which are aligned unidirectionally in the direction of the transverse axis 31 and which are permanently connected to one another by a heat-resistant resin. This results in a spring element with which along the transverse axis 31 in the direction of the vertical axis 32 acting spring forces predefinable strength dimension and activate.
  • the electrically insulating fibers are formed in this embodiment of the spring element of a plurality of glass fibers 19, wherein the glass fiber content of the spring element preferably about two-thirds and the resin content preferably about 1/3 percent by weight.
  • transverse axis 31 and the vertical axis 32 extend in an imaginary plane, which represents a cross section of the groove 6 and the slot closure arrangement 20.
  • a maximum spring travel is therefore ideally located approximately transversely in the direction of the vertical axis 32.
  • transversely refers to a position in the direction of the transverse axis 31 relative to the entire width 18 of the slot closure arrangement.
  • the cross section shown in FIG. 2 has a hatching which does not correspond to an advantageous fiber course of the fibers in the spring element, since the fibers would be interrupted in the direction of the transverse axis 31 at least in the region of the indentation 22. For this reason, the actual fiber path runs along the arc section, so that no or at least as few fibers as possible are interrupted by the indentation 22 extending transversely to the fiber direction.
  • the grooved wedge 1 has a plurality of ventilation slots 16 extending in the direction of the vertical axis 32 at its two wedge shoulders 29, 29 '. These ventilation slots 16 are used for heat dissipation of the thermal energy from the conductor rods 4.
  • the respect to the longitudinal axis 30 axially extending slots 1 1 in the end faces of the Nutenkeils 1 allow, with a suitable tool or device to move the spring element 2 relative to the Nutenkeil 1.
  • the indentation 22 has a shape extending in the direction of the longitudinal axis 30.
  • the prism-shaped for example, parallel to the longitudinal axis or parallel to the first surface 17 may be arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un système de fermeture de rainure (200) servant à fermer une rainure (6) remplie de barres conductrices (4) ou de bobines d'une machine électrique, le dispositif de fermeture de rainure (200) comportant une clavette à rainure (1) et une pièce de pression (2) qui s'étendent dans la direction d'un axe longitudinal (30). La clavette à rainure (1) et la pièce de pression (2) sont conçues comme une combinaison clavette-contre-clavette blocables l'une contre l'autre, vue transversalement à l'axe longitudinal (30). La pièce de pression est constitué comme élément ressort (2) dont la force de ressort peut être activée par un blocage de l'élément ressort (2) contre la clavette à rainure (1) par un déplacement de l'élément ressort (2) par rapport à la clavette à rainure (1) dans la direction de l'axe longitudinal (30).
PCT/EP2013/076722 2013-01-11 2013-12-16 Système pour fermer des rainures Ceased WO2014108276A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013200327.7 2013-01-11
DE102013200327 2013-01-11

Publications (2)

Publication Number Publication Date
WO2014108276A2 true WO2014108276A2 (fr) 2014-07-17
WO2014108276A3 WO2014108276A3 (fr) 2015-04-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/076722 Ceased WO2014108276A2 (fr) 2013-01-11 2013-12-16 Système pour fermer des rainures

Country Status (1)

Country Link
WO (1) WO2014108276A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319927A (zh) * 2014-10-11 2015-01-28 新疆金风科技股份有限公司 具有密封结构的电机槽楔以及组合装置
WO2016038277A1 (fr) * 2014-09-12 2016-03-17 Valeo Equipements Electriques Moteur Stator permettant une bonne portance de cale tout en optimisant le circuit magnétique et procédé d'isolation électrique dudit stator
US20200076251A1 (en) * 2017-03-02 2020-03-05 Tm4, Inc. Stator assembly with heat recovery for electric machines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH525581A (de) 1969-09-23 1972-07-15 Bbc Brown Boveri & Cie Einrichtung zum Einpressen des Nutenvorschlussstückes für in den Nuten des Eisenkörpers einer elektrischen Maschine eingelegte Wicklungsstäbe oder -spulen
DE2165727A1 (de) 1971-12-30 1973-07-05 Kraftwerk Union Ag Vorrichtung zum fixieren von wicklungsstaeben in nuten elektrischer maschinen, insbesondere turbogeneratoren
EP0639882A1 (fr) 1993-08-18 1995-02-22 ABB Management AG Dispositif de fermeture d'encoche

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564872A5 (fr) * 1973-11-05 1975-07-31 Bbc Brown Boveri & Cie
US5430340A (en) * 1993-04-15 1995-07-04 General Electric Co. Harmonic current path spring device between retaining ring and rotor wedge of a dynamoelectric generator
JP2001346350A (ja) * 2000-05-31 2001-12-14 Toshiba Corp 回転電機の固定子コイル支持装置
PL2187504T3 (pl) * 2008-11-18 2019-04-30 Abb Schweiz Ag Układ do zamykania rowków

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH525581A (de) 1969-09-23 1972-07-15 Bbc Brown Boveri & Cie Einrichtung zum Einpressen des Nutenvorschlussstückes für in den Nuten des Eisenkörpers einer elektrischen Maschine eingelegte Wicklungsstäbe oder -spulen
DE2165727A1 (de) 1971-12-30 1973-07-05 Kraftwerk Union Ag Vorrichtung zum fixieren von wicklungsstaeben in nuten elektrischer maschinen, insbesondere turbogeneratoren
EP0639882A1 (fr) 1993-08-18 1995-02-22 ABB Management AG Dispositif de fermeture d'encoche

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016038277A1 (fr) * 2014-09-12 2016-03-17 Valeo Equipements Electriques Moteur Stator permettant une bonne portance de cale tout en optimisant le circuit magnétique et procédé d'isolation électrique dudit stator
FR3025952A1 (fr) * 2014-09-12 2016-03-18 Valeo Equip Electr Moteur Stator permettant une bonne portance de cale tout en optimisant le circuit magnetique et procede d'isolation electrique dudit stator
CN106688162A (zh) * 2014-09-12 2017-05-17 法雷奥电机设备公司 允许良好垫片支撑能力且同时优化磁路的定子和用于所述定子电绝缘的方法
CN104319927A (zh) * 2014-10-11 2015-01-28 新疆金风科技股份有限公司 具有密封结构的电机槽楔以及组合装置
CN104319927B (zh) * 2014-10-11 2016-04-27 新疆金风科技股份有限公司 具有密封结构的电机槽楔以及组合装置
KR20170060150A (ko) * 2014-10-11 2017-05-31 신장 골드윈드 사이언스 앤 테크놀로지 컴퍼니., 리미티드. 밀봉 구조를 갖는 모터 슬롯 웨지 및 조합 장치
KR101974290B1 (ko) 2014-10-11 2019-04-30 신장 골드윈드 사이언스 앤 테크놀로지 컴퍼니., 리미티드. 밀봉 구조를 갖는 모터 슬롯 웨지 및 조합 장치
US10848030B2 (en) 2014-10-11 2020-11-24 Xinjiang Goldwind Science & Technology Co., Ltd. Motor slot wedge with sealing structure and combination device
US20200076251A1 (en) * 2017-03-02 2020-03-05 Tm4, Inc. Stator assembly with heat recovery for electric machines
US11722019B2 (en) * 2017-03-02 2023-08-08 Dana Tm4, Inc. Stator assembly with heat recovery for electric machines

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