FR2465096A1 - Stator framework for hydraulic alternator - has two concentric sections with sprung interconnections, inner surface of inner section being integral with stator laminations - Google Patents

Stator framework for hydraulic alternator - has two concentric sections with sprung interconnections, inner surface of inner section being integral with stator laminations Download PDF

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Publication number
FR2465096A1
FR2465096A1 FR7922982A FR7922982A FR2465096A1 FR 2465096 A1 FR2465096 A1 FR 2465096A1 FR 7922982 A FR7922982 A FR 7922982A FR 7922982 A FR7922982 A FR 7922982A FR 2465096 A1 FR2465096 A1 FR 2465096A1
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FR
France
Prior art keywords
carcass
carcass according
stator
cylindrical part
alternator
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.)
Withdrawn
Application number
FR7922982A
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French (fr)
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Jeumont Schneider SA
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Jeumont Schneider SA
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Filing date
Publication date
Application filed by Jeumont Schneider SA filed Critical Jeumont Schneider SA
Priority to FR7922982A priority Critical patent/FR2465096A1/en
Publication of FR2465096A1 publication Critical patent/FR2465096A1/en
Withdrawn legal-status Critical Current

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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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/10—Submerged units incorporating electric generators or motors
    • F03B13/105—Bulb groups
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

The stator framework ensures proper contact between it and the stator magnetic circuit during thermal stressing and esp. during asynchronous starting. The framework proper is positioned between the stator circuit (1) and a cooling water jacket (2) and consists of two concentric cylindrical sections (3,4) with a comparatively narrow space (5) between them. Both inner and outer parts have radial ribs (6) the outer having a heat transferring surface (7) in contact with the cooland. The two sections are held together by rectangular section longitudinal ribs (9,10) held by sprung arms (11). Dampers (12) may also interlink the two parts. The inner surface of the central section is made integral with the stator laminations.

Description

La présente invention concerne les alternateurs hydrauliques notamment intégrés dans les groupes-bulbes et, plus précisemment, la carcasse d'un tel alternateur. The present invention relates to hydraulic alternators in particular integrated in the bulb groups and, more precisely, the carcass of such an alternator.

On sait qu'en fonctionnement, le circuit magnétique statorique d'un alternateur intégré dans un groupe-bulbe se dilate beaucoup plus en chauffant que la carcasse qui l'entoure puisque la surface extérieure de cette dernière reste en contact avec une eau froide circulante. I1 s'ensuit que la carcasse fait office de frette pour le circuit magnétique statorique en engendrant des forces tendant à comprimer ce dernier dès que l'alternateur est en fonctionnement. We know that in operation, the stator magnetic circuit of an alternator integrated in a bulb group expands much more when heated than the carcass that surrounds it since the outer surface of the latter remains in contact with circulating cold water. It follows that the carcass acts as a hoop for the stator magnetic circuit by generating forces tending to compress the latter as soon as the alternator is in operation.

Pour résoudre ce problème, certains alternateurs ont été construits de telle manière qu'il n"y ait contact entre la carcasse et le circuit magnétique statorique qu'en fin de dilatation thermique. Toutefois, une telle disposition flottante a des conséquences néfastes sur les conditions de transmission du couple et de tenue aux attractions magnétiques déséquilibrées pendant tout le temps nécessaire à ltéchauffement requis pour assurer le contact entre la carcasse et le circuit magnétique statorique alors même que ces conditions sont extrêmement contraignantes à ce moment-là, en particulier pendant le démarrage asynchrone de l'alternatueur
La présente invention a pour but d'obvier à cet in convénient. A cette fin, selon l'invention, la carcasse comprend, concentriquement, une partie cylindrique ex térieure et une partie cylindrique intérieure, toutes deux constituées par une structure chaudronnée pourvue d'une pluralité de raidisseurs radiaux en alternance avec des traverses longitudinales auxquelles sont fixées respectivement les extrémités de lames formant ressort de manière à assurer une liaison mécanique élastique entre les deux parties.To solve this problem, some alternators have been constructed in such a way that there is contact between the carcass and the stator magnetic circuit only at the end of thermal expansion. However, such a floating arrangement has harmful consequences on the conditions. transmission of torque and resistance to unbalanced magnetic attractions during all the time necessary for the heating required to ensure contact between the carcass and the stator magnetic circuit even though these conditions are extremely restrictive at that time, in particular during start-up alternator asynchronous
The present invention aims to obviate this inconvenience. To this end, according to the invention, the carcass comprises, concentrically, an external cylindrical part and an internal cylindrical part, both constituted by a sheet metal structure provided with a plurality of radial stiffeners alternating with longitudinal crosspieces to which are fixed. respectively the ends of blades forming a spring so as to ensure an elastic mechanical connection between the two parts.

Grâce à cette disposition, la partie cylindrique extérieure, refroidie par l'eau circulant à l'extérieur de l'alternateur, ne peut pas faire office de frette à la partie cylindrique intérieure bien que cette dernière se dilate autant que le circuit magnétique statorique auquel elle est solidaire et les lames formant ressort transmettent directement à la partie cylindrique extérieure de la carcasse les forces engendrées par le couple et les attractions magnétiques déséquilibrées dès le démarrage du groupe. Thanks to this arrangement, the external cylindrical part, cooled by the water circulating outside the alternator, cannot act as a hoop to the internal cylindrical part although the latter expands as much as the stator magnetic circuit at which it is integral and the blades forming a spring transmit directly to the external cylindrical part of the carcass the forces generated by the torque and the unbalanced magnetic attractions from the start of the group.

Dans le domaine des turbo-alternateurs de grande puissance à axe vertical il est connu de mettre en oeuvre des structures élastiques entre les fondations en béton et le stator, afin d'atténuer le niveau des vibrations transmises aux fondations, comme décrit dans les brevets américains 3 523 203 et 3 742 271. Toutefois, les problèmes posés par les dilatations thermiques dans les alternateurs intégrés aux groupes-bulbes sont d'un ordre tout à fait différent. In the field of high-power turbo-alternators with vertical axis, it is known to use elastic structures between the concrete foundations and the stator, in order to attenuate the level of vibrations transmitted to the foundations, as described in the American patents. 3,523,203 and 3,742,271. However, the problems posed by thermal expansion in the alternators integrated into the bulb groups are of a completely different order.

Selon la présente invention, en d'autres mots, la carcasse de l'alternateur est constituée de deux parties concentriques, lesquelles sont réunies mécaniquement 1' une à l'autre au moyen d'une structure élastique autorisant leurs déformations relatives. According to the present invention, in other words, the carcass of the alternator consists of two concentric parts, which are joined mechanically to one another by means of an elastic structure allowing their relative deformations.

L'invention sera mieux comprise et d'autres buts, caractéristiques et avantages de celle-ci apparaitront plus clairement å la lecture de la description qui suit à laquelle un dessin est annexé,
La figure unique représente partiellement en coupe radiale une carcasse d'alternateur conforme à la présente invention0
En référence maintenant à la figure, la carcasse de l'alternateur est située entre le circuit magnétique statorique l et liteau circulant à l'extérieur 2. Cette carcasse est constituée de deux parties cylindriques concentriques 3 et 4 entre lesquelles un espace 5 est ménagé. Les deux parties cylindriques sont toutes deux constituées par une structure chaudronnée pourvue d'une pluralité de raidisseurs 6.La partie extérieure 4 est en contact direct avec l'eau 2 et constitue en fait l'enceinte extérieure du groupe bulbe. Lorsqu'elle joue le rôle d'échangeur thermique, des caissons échangeurs 7 sont prévus à la périphérie.The invention will be better understood and other objects, characteristics and advantages thereof will appear more clearly on reading the description which follows to which a drawing is attached,
The single figure partially shows in radial section an alternator frame according to the present invention0
Referring now to the figure, the alternator frame is located between the stator magnetic circuit l and the strip circulating outside 2. This frame consists of two concentric cylindrical parts 3 and 4 between which a space 5 is provided. The two cylindrical parts are both constituted by a sheet metal structure provided with a plurality of stiffeners 6. The external part 4 is in direct contact with the water 2 and in fact constitutes the external enclosure of the bulb group. When it acts as a heat exchanger, exchanger boxes 7 are provided at the periphery.

La partie intérieure 3 de la carcasse est rigidement solidaire du circuit magnétique statorique 1. A cet effet, des broches d'empilage et de serrage 8 sont soudées à la partie intérieure 3 de manière à faire partiellement saillie dans les tôles du circuit magnétique statorique 1.  The inner part 3 of the carcass is rigidly secured to the stator magnetic circuit 1. For this purpose, stacking and clamping pins 8 are welded to the inner part 3 so as to partially project into the sheets of the stator magnetic circuit 1 .

Pour assurer la liaison élastique entre la partie extérieure 4 et la partie intérieure 3 de la carcasse1 des traverses longitudinales 9 et 10 sont alternativement disposées dans chaque partie. De préférence, ces traverses 9 et 10 qui ont une section rectangulaire ont leurs côtés parallèles. Une lame Il formant ressort est fixée par ses extrémités respectivement à chaque jeu de traverses 9 et 10. Les prolongements de toutes ces lames il sont ainsi tangents à un cylindre imaginaire concentrique à la carcasse, mais de rayon légèrement plus petit que le rayon interne de la carcasse, de telle manière que la dilatation thermique de la partie intérieure 3 de la carcasse et du circuit magnétique statorique l ne soit pas contrariée,et que les efforts de couple soient intégralement transmis à la partie extérieure 4 de la carcasse.  To ensure the elastic connection between the external part 4 and the internal part 3 of the carcass1, longitudinal crosspieces 9 and 10 are alternately arranged in each part. Preferably, these crosspieces 9 and 10 which have a rectangular section have their parallel sides. A blade It forming a spring is fixed by its ends respectively to each set of crosspieces 9 and 10. The extensions of all these blades it are thus tangent to an imaginary cylinder concentric with the carcass, but of radius slightly smaller than the internal radius of the carcass, in such a way that the thermal expansion of the internal part 3 of the carcass and of the stator magnetic circuit l is not adversely affected, and that the torque forces are fully transmitted to the external part 4 of the carcass.

Des amortisseurs 12 peuvent être également prévus pour relier élastiquement les deux parties concentriques 3 et 4 de la carcasse. Ils sont alors constitués par des boites étanches à parois ondulées remplies d'élastomère prenant respectivement appui sur des raidisseurs radiaux 6 des deux parties de la carcasse. De préférence, les prolongements de tous ces raidisseurs 12 sont également tangents au même cylindre imaginaire que les prolongements des lames Il formant ressort.Ces raidisseurs ont pour rôle d'absorber les vibrations que les phénomènes électromagnétiques pourraient engendrer dans ltensemble constitué par la partie intérieure 3 de la carcasse et le circuit magnétique statorique lo
Bien que seul un mode de réalisation de l'invention ait été décrit, il est bien évident que toute modification apportée par l'Homme de l'Art dans l'esprit de l'invention ne sortirait pas du cadre de la présente invention o En particulier, des cales 13 peuvent être prévues entre chaque traverse longitudinale 9 de la partie extérieure 4 de la carcasse de manière à engendrr préalablement des forces d'extension appliquées à la pr- tie intérieure 3 de la carcasse en vue de soulager les lames Il lorsque l'alternateur est en fonctionnement.Dampers 12 can also be provided to elastically connect the two concentric parts 3 and 4 of the carcass. They then consist of sealed boxes with corrugated walls filled with elastomer, respectively bearing on radial stiffeners 6 of the two parts of the carcass. Preferably, the extensions of all these stiffeners 12 are also tangent to the same imaginary cylinder as the extensions of the blades It forming a spring. These stiffeners have the role of absorbing the vibrations that the electromagnetic phenomena could generate in the assembly constituted by the inner part 3 of the carcass and the stator magnetic circuit lo
Although only one embodiment of the invention has been described, it is obvious that any modification made by a person skilled in the art in the spirit of the invention would not depart from the scope of the present invention. in particular, shims 13 may be provided between each longitudinal cross member 9 of the external part 4 of the carcass so as to generate beforehand extension forces applied to the internal part 3 of the carcass in order to relieve the blades II when the alternator is running.

En outre, n'importe quel système de refroidissement peut être adapté. Des joints radiaux en élastomère peuvent être prévus entre les deux parties concentriques de la carcasse pour guider le fluide de refroidissemente  In addition, any cooling system can be adapted. Radial elastomer seals can be provided between the two concentric parts of the carcass to guide the coolant

Claims (11)

élastique entre les dites deux parties (3 & 4). elastic between said two parts (3 & 4). sort de manière à assurer une liaison mécanique comes out to ensure a mechanical connection tivement les extrémités de lames (11) formant res the ends of the blades (11) forming res gitudinales (9 & 10) auxquelles sont fixées respec gitudinal (9 & 10) to which are fixed respec radiaux (6) en alternanee aoec des- traverses lon radial (6) alternating with cross beams lon chaudronnée pourvue d'une pluralité de raidisseurs sheet metal with a plurality of stiffeners étant toutes deux constituées par une structure both being constituted by a structure libre (5) est ménagé, les deux parties (3 & 4) free (5) is provided, the two parts (3 & 4) lindrique intérieure (3) entre lesquelles un espace lindrique interior (3) between which a space partie cylindrique extérieure (4) et une partie cy external cylindrical part (4) and a cy part riséeen ce qu'elle comprend, concentriquement, une laughed at in that it includes, concentrically, a vu pour être intégré dans un groupe-bulbe, caracté seen to be integrated into a bulb group, character REVENDICATIONS 1. Carcasse pour alternateur hydraulique notamment pré CLAIMS 1. Carcass for hydraulic alternator in particular pre 2. Carcasse selon la revendication 1 caractérisée en ce2. Carcass according to claim 1 characterized in that que la dite partie cylindrique intérieure (3) est that said inner cylindrical part (3) is solidaire du circuit magnétique statorique (1) du integral with the stator magnetic circuit (1) of the dit alternateur. said alternator. 3. Carcasse selon la revendication 1 caractérisée en ce3. Carcass according to claim 1 characterized in that que la dite partie cylindrique extérieure (4) consti that the said external cylindrical part (4) constitutes tue l'enceinte extérieure du dit groupe-bulbe. kills the outer enclosure of said bulb group. 4. Carcasse selon la revendication 3, caractérisée ence4. Carcass according to claim 3, characterized ence que des caissons échangeurs thermiques (7) sont dis that heat exchanger boxes (7) are dis posés à la périphérie de la dite partie cylindrique placed on the periphery of said cylindrical part extérieure (4). exterior (4). 5. Carcasse selon la revendication 1 caractérisée en ce5. Carcass according to claim 1 characterized in that que les dites lames (11) sont disposées de telle ma that said blades (11) are arranged in such a way nière que leurs prolongements soient tangents à un denies that their extensions are tangent to a cylindre imaginaire9 concentrique à la dite carcas imaginary cylinder9 concentric to the said carcas se, mais de rayon légèrement plus petit que le rayon se, but with a radius slightly smaller than the radius interne de ladite carcasse. internal of said carcass. 6. Carcasse selon la revendication 1 caractérisée en ce6. Carcass according to claim 1 characterized in that que les dites traverses longitudinales (9 & lo) ont that the said longitudinal crosspieces (9 & lo) have une section rectangulaire et que leurs cotés sont a rectangular section and their sides are parallèles.  parallel. 7. Carcasse selon la revendication 1 caractérisée en ce7. Carcass according to claim 1 characterized in that que des cales (13) sont disposées entre chaque traver that shims (13) are arranged between each cross se longitudinale (9) de la dite partie cylindrique longitudinal (9) of said cylindrical part extérieure (4). exterior (4). 8. Carcasse selon la revendication 1 caractérisée en ce8. Carcass according to claim 1 characterized in that qu'elle comprend en outre, des amortisseurs (12) pre that it further comprises shock absorbers (12) pre nant appui respectivement sur des raidisseurs radiaux bearing respectively on radial stiffeners (6) de chaque partie (3 & 4) de la dite carcasse. (6) of each part (3 & 4) of said carcass. 9. Carcasse selon la revendication 8 caractérisée en ce9. Carcass according to claim 8 characterized in that que les dits amortisseurs (12) sont constitués par that said shock absorbers (12) are constituted by des boites étanches à parois ondulées remplies d'é élastomère, watertight boxes with corrugated walls filled with elastomer, 10. Carcasse selon la revendication 8 caractérisée en ce10. Carcass according to claim 8 characterized in that que les dits amortisseurs (12) sont disposés de tel that said dampers (12) are arranged in such a way le manière que leurs prolongements soient tangents à the way that their extensions are tangent to un cylindre imaginaire concentrique à la dite carcas an imaginary cylinder concentric to the so-called carcas se mais de rayon légèrement plus petit que le rayon but with a radius slightly smaller than the radius interne de ladite carcasse. internal of said carcass. fluide de refroidissement dans l'espace libre (5)  free space coolant (5) cylindrique extérieure (4) de manière à guider le cylindrical outer (4) so as to guide the partie cylindrique intérieure (3) et la dite partie inner cylindrical part (3) and said part que des joints radiaux sont disposés entre la dite that radial joints are arranged between the said cylindre imaginaire0 12.Carcasse selon la revendication 1 caractérisée en ce 12. imaginary cylinder 12. Carcass according to claim 1, characterized in that (12) et des dites lames (11) sont tangents au même (12) and said blades (11) are tangent to the same en ce que les prolongements des dits amortisseurs in that the extensions of said dampers 11. Carcasse selon la revendication 5 et 10 caractérisée 11. Carcass according to claim 5 and 10 characterized
FR7922982A 1979-09-14 1979-09-14 Stator framework for hydraulic alternator - has two concentric sections with sprung interconnections, inner surface of inner section being integral with stator laminations Withdrawn FR2465096A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7922982A FR2465096A1 (en) 1979-09-14 1979-09-14 Stator framework for hydraulic alternator - has two concentric sections with sprung interconnections, inner surface of inner section being integral with stator laminations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7922982A FR2465096A1 (en) 1979-09-14 1979-09-14 Stator framework for hydraulic alternator - has two concentric sections with sprung interconnections, inner surface of inner section being integral with stator laminations

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014000789A1 (en) * 2012-06-27 2014-01-03 Siemens Aktiengesellschaft Vibrational decoupling of the stator of an electric machine
DE102014221492A1 (en) * 2014-10-23 2016-04-28 Bayerische Motoren Werke Aktiengesellschaft Electric machine with a reduced noise emission

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500004A (en) *
US2424299A (en) * 1945-01-13 1947-07-22 Westinghouse Electric Corp Generator
FR1180479A (en) * 1957-07-04 1959-06-04 Charmilles Sa Ateliers Hydro-electric installation
FR1316344A (en) * 1962-02-28 1963-01-25 Licentia Gmbh Support construction for the package of stator sheets of rotating electric machines
US3742271A (en) * 1971-10-18 1973-06-26 Westinghouse Electric Corp Vertical dynamoelectric machine with improved stator support
FR2376542A1 (en) * 1976-12-30 1978-07-28 Aroshidze Jury Spring mounted stator core of electrical machine - is attached to stator frame at points of maximum stiffness to form rigid structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500004A (en) *
US2424299A (en) * 1945-01-13 1947-07-22 Westinghouse Electric Corp Generator
FR1180479A (en) * 1957-07-04 1959-06-04 Charmilles Sa Ateliers Hydro-electric installation
FR1316344A (en) * 1962-02-28 1963-01-25 Licentia Gmbh Support construction for the package of stator sheets of rotating electric machines
US3742271A (en) * 1971-10-18 1973-06-26 Westinghouse Electric Corp Vertical dynamoelectric machine with improved stator support
FR2376542A1 (en) * 1976-12-30 1978-07-28 Aroshidze Jury Spring mounted stator core of electrical machine - is attached to stator frame at points of maximum stiffness to form rigid structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014000789A1 (en) * 2012-06-27 2014-01-03 Siemens Aktiengesellschaft Vibrational decoupling of the stator of an electric machine
CN104412492B (en) * 2012-06-27 2017-04-05 西门子公司 It is decoupled in the vibrotechnique of the stator of motor
KR101926222B1 (en) 2012-06-27 2018-12-06 지멘스 악티엔게젤샤프트 Vibrational decoupling of the stator of an electric machine
DE102014221492A1 (en) * 2014-10-23 2016-04-28 Bayerische Motoren Werke Aktiengesellschaft Electric machine with a reduced noise emission

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