EP2754228A2 - Electric machine with split casing and segmented stator - Google Patents

Electric machine with split casing and segmented stator

Info

Publication number
EP2754228A2
EP2754228A2 EP12787433.7A EP12787433A EP2754228A2 EP 2754228 A2 EP2754228 A2 EP 2754228A2 EP 12787433 A EP12787433 A EP 12787433A EP 2754228 A2 EP2754228 A2 EP 2754228A2
Authority
EP
European Patent Office
Prior art keywords
stator
segments
housing
air gap
windings
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Withdrawn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
EP12787433.7A
Other languages
German (de)
French (fr)
Inventor
Christian Schiller
Peter Petereit
Rüdiger Schäfer
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP2754228A2 publication Critical patent/EP2754228A2/en
Withdrawn legal-status Critical Current

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
    • H02K1/18—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
    • 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
    • H02K1/16—Stator cores with slots for windings
    • 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
    • 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
    • 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
    • H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/15—Sectional machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine

Definitions

  • the invention relates to an electrical machine having a housing, a disposed in the housing stator and, disposed within the stator rotatable rotor, wherein the housing min ⁇ least comprises at least two housing segments and the stator two stator segments, and a method for producing such a machine.
  • Such an electric machine or such a method can be used, for example, in tube mills.
  • the motors required for their drive can be particularly powerful and have diameters of several meters.
  • a ring motor of a tube mill which consists inter alia of a plurality of stator segments and housing covers and a rotor, wherein the ring motor between the stator and the rotor has an air gap.
  • the stator segments each have a Wicklungssys ⁇ system and simultaneously form the support structure of the Ringmo ⁇ tors.
  • the invention has for its object to provide an electric machine, which has favorable transport and installation properties at high output and despite normal manufacturing tolerances of their components allows the achievement of a precisely adjustable air gap.
  • This object is further achieved by a mill of demanding 6. Since mill drives make special demands on Leis ⁇ tung, torque, and stability of the support structure, a use of the electric machine there is particularly advantageous ⁇ way. Finally, this object is also achieved by a method for producing an electrical machine according to claim 7.
  • the stator and the housing are two separate machine components which are each subdivided into segments. This allows the construction of particularly slightest ⁇ tung strong and large electric machines by assembling the respective segments.
  • Such powerful Ma ⁇ machines are in particular used as a direct drive, for example in mill drives.
  • An important aspect of the present invention is the separation of the stator from the casing so that the electrical machines Ma ⁇ housing segments and separate stator segments comprising. Because especially powerful machines are not in one
  • the mechanically detachable connection is used inter alia to initiate the required counter torque of the motor from the stator into the support structure of the housing and can in particular be designed positive or non-positive.
  • the connection for example in the form of a screw connection, is an assembly of the machine relatively easy to bewerkstelli ⁇ conditions.
  • stator segments are ver ⁇ used so that they are relatively small and are produced in larger quantities.
  • the connection can be used for adjusting the stator segments. This is particularly advantageous if the housing segments and stator segments are used comparatively coarse Vietnamese toysstoleran ⁇ zen and can serve the mechanically releasable connection to compensate for the tolerances. Even with a deformation caused by gravity of the housing, this is an advantageous aspect, especially for large and heavy machines, as can also be readjusted. Furthermore, the production costs can be reduced by the larger number of stator segments and by the large manufacturing tolerances.
  • stator segments can be replaced without much effort at a ⁇ OF INVENTION to the invention the electrical machine.
  • stator segments can be such ges ⁇ taltet that they each include electrical windings or coils and impregnation of the windings or
  • Coils is performed only after their application to the respective stator segments.
  • the impregnation can be carried out, for example, as a vacuum pressure impregnation.
  • This initially allows the not yet impregnated windings to be applied to the respective stator segment, wherein a plurality of windings can certainly be applied.
  • the windings may for example be designed as coil, loop, rod or tooth windings.
  • at least two of the stator segments can be fixed to one of the housing segments. By fixing at least two stator segments to a housing segment, it is possible to make the housing comparatively ⁇ as grobgliedrig, so that the housing is divided into a few housing segments. Thus, the at ⁇ paid is reduced by partial joints between the housing segments.
  • stator segments on the housing segments can be carried out more precisely, since the stator can be subdivided into finer stator segments.
  • a wide ⁇ rer advantage of the finer subdivision of the stator such that the stator segments can be produced in a standardized form and Her ⁇ out costs can be reduced due to the higher number, and the lower development or adjustment requirements.
  • a respective air gap between the respective stator segments and the rotor is adjustable in such a way by means of the particular compound, the air gap for each of the Statorseg ⁇ elements is equal to a predetermined air gap.
  • the air gap for each stator segment is a separately ⁇ adjustable.
  • the air gap for each stator segment is a separately ⁇ adjustable.
  • the housing segments and the stator can be selected, which reduces the manufacturing costs of the housing segments and the Statorseg ⁇ ments.
  • stator segments each comprise at least two windings, which are each part of a total winding of the stator.
  • stator segment By applying at least two windings on each stator segment, the production of the entire stator is simplified ver ⁇ .
  • a coil is first wound, drawn and insulated, for example by bandaging. Subsequently ⁇ ated the coil is impregnated and finally employed isolated and the impregnated coil in the stator.
  • the simplification lies in the fact that the respective stator segment is first with at least two windings, such as windings 20, is provided, which already may have a isolie ⁇ Rende bandaging. Thereby, the impregnation of at least two or more Wicklun ⁇ gene in a single step by impregnating the entire stator segment together with the windings applied can be effected, which simplifies the production and makes it more cost-effective.
  • the stator segment including windings for this purpose has such a spatial extent that it can be impregnated in a single operation, in particular by introducing it into a vessel for carrying out a vacuum pressure impregnation.
  • the impregnation of stator segments together with windings which have not yet been impregnated enables an overall faster impregnation of the windings, in particular in comparison with the impregnation of individual windings in the manufacture of larger motors.
  • the advantage is particularly evident when an electric machine is particularly large and powerful. For example, such machines may have about 600 windings which have been previously impregnated individually and only then assembled into a stator. It is now possible, the windings 600, such that windings 50 come to 12 to stator defending ⁇ len on each stator segment, which are impregnated together in each case in one step.
  • the electric machine has a power of more than 10 MW.
  • the drive power can also be in the range of 20 MW to 40 MW.
  • the present invention can be transferred from rotary electric machines to linear electric machines, for example, to linear synchronous motors.
  • rotary electric machines for example, to linear synchronous motors.
  • linear electric machines for example, to linear synchronous motors.
  • FIG. 2 shows a detail of a schematic representation of an embodiment of an electric machine according to the invention.
  • Figure 1 shows an electrical machine according to the prior Tech ⁇ technology.
  • a ring motor 10 has a stator 1 with stator segments 4 and a rotor 2, wherein an air gap 5 is arranged between the stator 1 and the rotor 2.
  • the stator segments 4 are connected to one another via separation points 12, wherein the ring motor 10 rests on a foundation 13 via two bearing surfaces.
  • the stator segments 4 have a Wicklungssys ⁇ TEM having teeth 14, grooves 15 and tooth coils 16 summarizes environmentally.
  • FIG. 2 shows a section of a schematic representation of an embodiment of an electrical machine according to the invention 10.
  • Several stator 4 are fi xed in each case by means of a me ⁇ mechanically releasable connection to a housing segment.
  • a cylindrical housing is formed by a plurality of housing segments 3 and a cylindrical stator 1 by a plurality of stator segments 4, wherein based on the connec ⁇ tion, a desired stator inner diameter can be adjusted.
  • an air gap 5 between the stator 1 and a cylindrical rotor 2 is adjustable, wherein the adjustable distance between the rotor 2 and the respective stator 4 by means of the mechanically releasable connection, for example in the form of a screw, is selectable and usefully for each stator 4 equal is selected and set.
  • the housing segments 3 are comparatively robust and large components, since they must pass on the required counter torque of the electric ⁇ machine 10, which is supplied to them via the connection of the stator 4.
  • the housing is made up of comparatively few housing segments 3, which are chosen to be comparatively large, since connecting points between housing segments 3 weaken the carrying structure.
  • the stator 4 can on the one hand small Ver ⁇ be chosen to be equal to the housing segments 3, so that a plurality of stator segments 4 fi respectively to a housing segment 3 are xed. Since a plurality of windings may be applied to the respective stator segments 4, the stator 4 on the other hand are guided in size from ⁇ compared to the windings. For example, several dozen Wick- lungs or coils on a stator 4 is applied to ⁇ .
  • the size of the respective stator segments 4 together with the depending ⁇ nosti applied windings is preferably dimensioned such that in each case the entire stator segment 4 together with up ⁇ brought windings can be impregnated in a single step by means of vacuum-pressure impregnation, for which it in common for this process vessels must be feasible.
  • the invention relates to an electric Ma ⁇ machine with a housing, a disposed in the housing Sta ⁇ tor and, disposed within the stator rotatable rotor, wherein the housing at least two housing segments and the stator comprises at least two stator segments, and a method for producing such Machine.

Landscapes

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

Abstract

In summary, the invention relates to an electric machine having a housing, a stator which is arranged in the housing and a rotatable rotor arranged inside the stator, wherein the housing comprises at least two housing segments, and the stator comprises at least two stator segments, and a method for manufacturing such a machine. In order to provide an electric machine which has favourable transportation and installation properties together with a high output power and permits a precisely adjustable air gap to be made available despite customary fabrication tolerances of its components, it is proposed that it be possible to secure each of the stator segments individually to one of the housing segments by means of, in each case, at least one mechanically detachable connection.

Description

Beschreibung description
Elektrische Maschine mit Gehäuse- und Statorsegmenten Die Erfindung betrifft eine elektrische Maschine mit einem Gehäuse, einem im Gehäuse angeordneten Stator und einem innerhalb des Stators angeordneten drehbaren Rotor, wobei das Gehäuse mindestens zwei Gehäusesegmente und der Stator min¬ destens zwei Statorsegmente umfasst, sowie ein Verfahren zur Herstellung einer derartigen Maschine. Electrical machine with casing and stator segments The invention relates to an electrical machine having a housing, a disposed in the housing stator and, disposed within the stator rotatable rotor, wherein the housing min ¬ least comprises at least two housing segments and the stator two stator segments, and a method for producing such a machine.
Eine derartige elektrische Maschine bzw. ein derartiges Ver¬ fahren kommen beispielsweise bei Rohrmühlen vor. Die zu deren Antrieb benötigten Motoren können besonders leistungsstark sein und Durchmesser von mehreren Metern aufweisen. Aus Such an electric machine or such a method can be used, for example, in tube mills. The motors required for their drive can be particularly powerful and have diameters of several meters. Out
Transportgründen bestehen solche Motoren oftmals aus mehreren kleineren Segmenten, welche dann vor Ort zusammengebaut werden und in zusammengebautem Zustand gleichzeitig das Gehäuse und den Stator bilden.  For transport reasons, such motors often consist of several smaller segments, which are then assembled on site and at the same time form the housing and the stator in the assembled state.
Aus der DE 10 2007 005 131 B3 ist ein Ringmotor einer Rohrmühle bekannt, der unter anderem aus mehreren Statorsegmenten und Gehäuseabdeckungen sowie einem Rotor besteht, wobei der Ringmotor zwischen dem Stator und dem Rotor einen Luftspalt aufweist. Die Statorsegmente weisen jeweils ein Wicklungssys¬ tem auf und bilden gleichzeitig die Tragestruktur des Ringmo¬ tors . From DE 10 2007 005 131 B3 a ring motor of a tube mill is known, which consists inter alia of a plurality of stator segments and housing covers and a rotor, wherein the ring motor between the stator and the rotor has an air gap. The stator segments each have a Wicklungssys ¬ system and simultaneously form the support structure of the Ringmo ¬ tors.
Der Erfindung liegt die Aufgabe zugrunde, eine elektrische Maschine zu schaffen, welche bei hoher Ausgangsleistung günstige Transport- und Installationseigenschaften aufweist und trotz gewöhnlicher Fertigungstoleranzen ihrer Komponenten die Bewerkstelligung eines präzise einstellbaren Luftspalts erlaubt . The invention has for its object to provide an electric machine, which has favorable transport and installation properties at high output and despite normal manufacturing tolerances of their components allows the achievement of a precisely adjustable air gap.
Diese Aufgabe wird bei einer elektrischen Maschine der ein¬ gangs genannten Art dadurch gelöst, dass mittels jeweils zu¬ mindest einer mechanisch lösbaren Verbindung jedes der Sta- torsegmente einzeln an einem der Gehäusesegmente fixierbar ist . This object is achieved in an electric machine of the type mentioned at the outset a ¬ characterized in that by means of in each case at least ¬ a mechanically detachable connection of each of the sta- Torsegmente individually on one of the housing segments is fixable.
Diese Aufgabe wird weiter gelöst durch eine Mühle gemäß An- spruch 6. Da Mühlenantriebe besondere Anforderungen an Leis¬ tung, Drehmoment und Stabilität der Tragstruktur stellen, ist ein Einsatz der elektrischen Maschine dort besonders vorteil¬ haft . Schließlich wird diese Aufgabe auch gelöst durch ein Verfahren zur Herstellung einer elektrischen Maschine gemäß Anspruch 7. This object is further achieved by a mill of demanding 6. Since mill drives make special demands on Leis ¬ tung, torque, and stability of the support structure, a use of the electric machine there is particularly advantageous ¬ way. Finally, this object is also achieved by a method for producing an electrical machine according to claim 7.
Erfindungsgemäß sind der Stator und das Gehäuse zwei getrenn- te Maschinenkomponenten, welche jeweils in Segmente unterteilt sind. Dies erlaubt die Konstruktion von besonders leis¬ tungsstarken und großen elektrischen Maschinen durch Zusammensetzen der jeweiligen Segmente. Derart leistungsstarke Ma¬ schinen werden beispielsweise bei Mühlenantrieben, insbeson- dere als Direktantrieb, eingesetzt. According to the invention, the stator and the housing are two separate machine components which are each subdivided into segments. This allows the construction of particularly slightest ¬ tung strong and large electric machines by assembling the respective segments. Such powerful Ma ¬ machines are in particular used as a direct drive, for example in mill drives.
Ein wichtiger Aspekt der vorliegenden Erfindung ist die Trennung des Stators vom Gehäuse derart, dass die elektrische Ma¬ schinen Gehäusesegmente und separate Statorsegmente aufweist. Da insbesondere leistungsstarke Maschinen nicht in einemAn important aspect of the present invention is the separation of the stator from the casing so that the electrical machines Ma ¬ housing segments and separate stator segments comprising. Because especially powerful machines are not in one
Stück beziehungsweise in zusammengebautem Zustand transportiert werden können, da sie für einen Transport, beispiels¬ weise mittels Krananlagen, über Brücken oder durch Tunnel, zu groß und zu schwer sind, bietet die Unterteilung in ein sepa- rates Gehäuse, bestehend aus mindestens zwei Gehäusesegmen¬ ten, und einen separaten Stator, bestehend aus mindestens zwei Statorsegmenten, besondere Vorteile beim Transport. Pieces or can be transported in the assembled state, since they are too large and too heavy for transport ¬ example by means of cranes, bridges or tunnels, offers the subdivision in a separate housing, consisting of at least two Gehäusegmen ¬ and a separate stator consisting of at least two stator segments, special advantages during transport.
Die mechanisch lösbare Verbindung dient unter anderem dazu, das erforderliche Gegendrehmoment des Motors vom Stator in die Tragstruktur des Gehäuses einzuleiten und kann insbesondere form- oder kraftschlüssig ausgeführt sein. Durch die Verbindung, beispielsweise in Form einer Schraubverbindung, ist eine Montage der Maschine relativ leicht zu bewerkstelli¬ gen. Dabei können beispielsweise Statorsegmente derart ver¬ wendet werden, dass sie vergleichsweise klein sind und in größerer Stückzahl hergestellt werden. Weiterhin kann die Verbindung zur Justage der Statorsegmente verwendet werden. Dies ist insbesondere von Vorteil, wenn Gehäusesegmente und Statorsegmente mit vergleichsweise groben Fertigungstoleran¬ zen verwendet werden und die mechanisch lösbare Verbindung zum Ausgleich der Toleranzen dienen kann. Auch bei einer schwerkraftbedingten Verformung des Gehäuses ist dies ein vorteilhafter Aspekt, insbesondere bei großen und schweren Maschinen, da auch nachjustiert werden kann. Weiterhin können durch die größere Stückzahl der Statorsegmente sowie durch die großen Fertigungstoleranzen die Produktionskosten verrin- gert werden. The mechanically detachable connection is used inter alia to initiate the required counter torque of the motor from the stator into the support structure of the housing and can in particular be designed positive or non-positive. By the connection, for example in the form of a screw connection, is an assembly of the machine relatively easy to bewerkstelli ¬ conditions. In this case, for example, stator segments are ver ¬ used so that they are relatively small and are produced in larger quantities. Furthermore, the connection can be used for adjusting the stator segments. This is particularly advantageous if the housing segments and stator segments are used comparatively coarse Fertigungstoleran ¬ zen and can serve the mechanically releasable connection to compensate for the tolerances. Even with a deformation caused by gravity of the housing, this is an advantageous aspect, especially for large and heavy machines, as can also be readjusted. Furthermore, the production costs can be reduced by the larger number of stator segments and by the large manufacturing tolerances.
Besonders vorteilhaft ist weiterhin, dass bei einer erfin¬ dungsgemäßen elektrischen Maschine einzelne defekte oder beschädigte Statorsegmente ohne großen Aufwand ersetzt werden können. Hierzu muss lediglich die Verbindung des betroffenen Statorsegments zu dem ihn tragenden Gehäusesegment gelöst werden, das defekte oder beschädigte Statorsegment entfernt werden und schließlich ein passendes Statorsegment wieder mittels zumindest einer mechanisch lösbaren Verbindung am Ge- häusesegment fixiert werden. Dadurch sind Wartungs- und Repa¬ raturarbeiten kostengünstig und schnell durchführbar. Is also especially advantageous that individual faulty or damaged stator segments can be replaced without much effort at a ¬ OF INVENTION to the invention the electrical machine. For this purpose, it is only necessary to release the connection of the affected stator segment to the housing segment carrying it, to remove the defective or damaged stator segment, and finally to fix a matching stator segment to the housing segment again by means of at least one mechanically detachable connection. Thereby, maintenance and Repa ¬ raturarbeiten inexpensive and quick to perform.
Zusätzlich können die jeweiligen Statorsegmente derartig ges¬ taltet sein, dass sie jeweils elektrische Wicklungen oder Spulen umfassen und eine Imprägnierung der Wicklungen oderIn addition, the respective stator segments can be such ges ¬ taltet that they each include electrical windings or coils and impregnation of the windings or
Spulen erst nach ihrem Aufbringen auf den jeweiligen Statorsegmenten durchgeführt wird. Die Imprägnierung kann beispielsweise als Vakuum-Druck-Imprägnierung ausgeführt werden. Dies erlaubt zunächst die noch nicht imprägnierten Wicklungen auf dem jeweiligen Statorsegment aufzubringen, wobei durchaus eine Vielzahl von Wicklungen aufgebracht werden kann. Die Wicklungen können beispielsweise als Spulen-, Schleifen-, Stab- oder Zahnwicklungen ausgeführt werden. Bei einer vorteilhaften Ausgestaltung der Erfindung sind mindestens zwei der Statorsegmente an einem der Gehäusesegmente fixierbar . Durch die Fixierung von mindestens zwei Statorsegmenten an einem Gehäusesegment ist es möglich, das Gehäuse vergleichs¬ weise grobgliedrig auszuführen, so dass das Gehäuse in nur wenige Gehäusesegmente unterteilt ist. Dadurch wird die An¬ zahl von Teilfugen zwischen den Gehäusesegmenten verringert. Da Gegendrehmomente zu Antriebsdrehmomenten der elektrischen Maschine das Gehäuse beanspruchen, trägt die Verringerung der Anzahl von Teilfugen entscheidend zur Stabilität der Maschine bei . Gleichzeitig wird ein relativ fein untergliederter Stator ermöglicht. Die schon erwähnte Justierung der Statorsegmente an den Gehäusesegmenten lässt sich genauer durchführen, da der Stator in feinere Statorsegmente unterteilbar ist. Ein weite¬ rer Vorteil der feineren Unterteilung des Stators ist, dass derartige Statorsegmente in standardisierter Form hergestellt werden können und dank der höheren Stückzahl und dem geringeren Entwicklungs- beziehungsweise Anpassungsbedarfs die Her¬ stellungskosten gesenkt werden können. Bei einer weiteren vorteilhaften Ausgestaltung der Erfindung ist ein jeweiliger Luftspalt zwischen den jeweiligen Statorsegmenten und dem Rotor derart mittels der jeweiligen Verbindung einstellbar, dass der Luftspalt für jedes der Statorseg¬ mente gleich einem vorgebbaren Luftspalt ist. Coils is performed only after their application to the respective stator segments. The impregnation can be carried out, for example, as a vacuum pressure impregnation. This initially allows the not yet impregnated windings to be applied to the respective stator segment, wherein a plurality of windings can certainly be applied. The windings may for example be designed as coil, loop, rod or tooth windings. In an advantageous embodiment of the invention, at least two of the stator segments can be fixed to one of the housing segments. By fixing at least two stator segments to a housing segment, it is possible to make the housing comparatively ¬ as grobgliedrig, so that the housing is divided into a few housing segments. Thus, the at ¬ paid is reduced by partial joints between the housing segments. Since counter torques to drive torques of the electrical machine claim the housing, the reduction in the number of part joints contributes significantly to the stability of the machine. At the same time, a relatively finely subdivided stator is made possible. The already mentioned adjustment of the stator segments on the housing segments can be carried out more precisely, since the stator can be subdivided into finer stator segments. A wide ¬ rer advantage of the finer subdivision of the stator such that the stator segments can be produced in a standardized form and Her ¬ out costs can be reduced due to the higher number, and the lower development or adjustment requirements. In a further advantageous embodiment of the invention, a respective air gap between the respective stator segments and the rotor is adjustable in such a way by means of the particular compound, the air gap for each of the Statorseg ¬ elements is equal to a predetermined air gap.
Durch die mechanisch lösbare Verbindung zwischen den jeweiligen Statorsegmenten und den jeweiligen Gehäusesegmenten ist der Luftspalt für jedes einzelne Statorsegment separat ein¬ stellbar. Insbesondere für große Maschinen, bei denen auf- grund ihres Eigengewichts Verformungen auftreten können, kann somit bei der Montage vor Ort eine präzise Einstellung des Luftspalts und gleichermaßen des Statorinnendurchmessers er¬ folgen. Etwaige Verformungen können somit kompensiert werden. Gleichzeitig können großzügigere Fertigungstoleranzen für die Gehäusesegmente und die Statorsegmente gewählt werden, was die Herstellungskosten der Gehäusesegmente und der Statorseg¬ mente verringert. By mechanically releasable connection between the respective stator segments and the respective housing segments the air gap for each stator segment is a separately ¬ adjustable. Especially for large machines where, owing to their own weight deformations can occur, thus he can ¬ follow in the assembly spot a precise adjustment of the air gap and both of Statorinnendurchmessers. Any deformations can thus be compensated. At the same generous manufacturing tolerances for the housing segments and the stator can be selected, which reduces the manufacturing costs of the housing segments and the Statorseg ¬ ments.
In weiterer vorteilhafter Ausgestaltung der Erfindung umfassen die Statorsegmente jeweils mindestens zwei Wicklungen, welche jeweils ein Teil einer Gesamtwicklung des Stators sind . In a further advantageous embodiment of the invention, the stator segments each comprise at least two windings, which are each part of a total winding of the stator.
Durch das Aufbringen von mindestens zwei Wicklungen auf jedem Statorsegment wird die Herstellung des gesamten Stators ver¬ einfacht. Oftmals wird bei der Herstellung von Statoren oder Statorsegmenten zunächst eine Spule gewickelt, gezogen und isoliert, beispielsweise durch eine Bandagierung. Anschlie¬ ßend wird die Spule imprägniert und schließlich die isolierte und imprägnierte Spule in den Stator eingesetzt. By applying at least two windings on each stator segment, the production of the entire stator is simplified ver ¬ . Often, in the manufacture of stators or stator segments, a coil is first wound, drawn and insulated, for example by bandaging. Subsequently ¬ ßend the coil is impregnated and finally employed isolated and the impregnated coil in the stator.
Die Vereinfachung liegt nun darin, dass das jeweilige Stator- segment zuerst mit mindestens zwei Wicklungen, beispielsweise mit 20 Wicklungen, versehen wird, welche schon eine isolie¬ rende Bandagierung aufweisen können. Dadurch kann die Imprägnierung von mindestens zwei beziehungsweise mehreren Wicklun¬ gen in einem einzigen Arbeitsschritt durch Imprägnieren des gesamten Statorsegments samt aufgebrachten Wicklungen erfolgen, was die Herstellung vereinfacht und kostengünstiger macht . The simplification lies in the fact that the respective stator segment is first with at least two windings, such as windings 20, is provided, which already may have a isolie ¬ Rende bandaging. Thereby, the impregnation of at least two or more Wicklun ¬ gene in a single step by impregnating the entire stator segment together with the windings applied can be effected, which simplifies the production and makes it more cost-effective.
Vorteilhafterweise weist das Statorsegment samt Wicklungen hierzu eine solche räumliche Ausdehnung auf, dass es in einem einzigen Vorgang imprägniert werden kann, insbesondere durch das Einbringen in ein Gefäß zur Durchführung einer Vakuum- Druck-Imprägnierung. Die Imprägnierung von Statorsegmenten samt noch nicht imprägnierten Wicklungen ermöglicht eine ins- gesamt schnellere Imprägnierung der Wicklungen, insbesondere im Vergleich zur Imprägnierung von einzelnen Wicklungen bei der Herstellung von größeren Motoren. Der Vorteil wird insbesondere dann offenkundig, wenn eine elektrische Maschine besonders groß und leistungsstark ist. Beispielsweise können solche Maschinen etwa 600 Wicklungen aufweisen, welche bisher einzeln imprägniert wurden und erst danach zu einem Stator zusammengesetzt wurden. Nunmehr ist es möglich, die 600 Wicklungen auf 12 Statorsegmente zu vertei¬ len, so dass auf jedes Statorsegment 50 Wicklungen kommen, welche jeweils in einem Arbeitsschritt zusammen imprägniert werden . Advantageously, the stator segment including windings for this purpose has such a spatial extent that it can be impregnated in a single operation, in particular by introducing it into a vessel for carrying out a vacuum pressure impregnation. The impregnation of stator segments together with windings which have not yet been impregnated enables an overall faster impregnation of the windings, in particular in comparison with the impregnation of individual windings in the manufacture of larger motors. The advantage is particularly evident when an electric machine is particularly large and powerful. For example, such machines may have about 600 windings which have been previously impregnated individually and only then assembled into a stator. It is now possible, the windings 600, such that windings 50 come to 12 to stator defending ¬ len on each stator segment, which are impregnated together in each case in one step.
In weiterer vorteilhafter Ausgestaltung der Erfindung weist die elektrische Maschine eine Leistung von mehr als 10 MW auf. Insbesondere bei großen Ringmotoren und bei Antrieben für Mühlen können solch leistungsstarke Maschine eingesetzt werden. Beispielsweise kann die Antriebsleistung auch im Bereich von 20 MW bis 40 MW liegen. In a further advantageous embodiment of the invention, the electric machine has a power of more than 10 MW. Especially in large ring motors and drives for mills such powerful machine can be used. For example, the drive power can also be in the range of 20 MW to 40 MW.
Durch eine Imprägnierung mittels Vakuum-Druck-Imprägnierung können weiterhin große Spannungsstufen, beispielsweise von über 6 kV, zwischen einzelnen Wicklungen und einzelnen Statorsegmenten realisiert werden. Dies ist insbesondere bei hochpoligen und langsam laufenden Maschinen von Vorteil, wie sie zum Beispiel bei Generatoren und Kompressorantrieben sowie im Bergbau und in der Erzverarbeitung eingesetzt werden. By impregnation by means of vacuum pressure impregnation, large voltage levels, for example of more than 6 kV, can be realized between individual windings and individual stator segments. This is particularly advantageous in high-pole and low-speed machines, as used for example in generators and compressor drives as well as in mining and ore processing.
Im Übrigen kann die vorliegende Erfindung von rotatorischen elektrischen Maschinen auf lineare elektrische Maschinen, beispielsweise auf Linearsynchronmotoren, übertragen werden. Im Folgenden wird die Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher beschrieben und erläutert. Es zeigen: Incidentally, the present invention can be transferred from rotary electric machines to linear electric machines, for example, to linear synchronous motors. In the following the invention will be described and explained in more detail with reference to the embodiments illustrated in the figures. Show it:
FIG 1 eine elektrische Maschine gemäß Stand der Technik und 1 shows an electrical machine according to the prior art and
FIG 2 einen Ausschnitt einer Schemadarstellung einer Ausführungsform einer erfindungsgemäßen elektrischen Maschine . Figur 1 zeigt eine elektrische Maschine gemäß Stand der Tech¬ nik. Ein Ringmotor 10 weist einen Stator 1 mit Statorsegmenten 4 sowie einen Rotor 2 auf, wobei ein Luftspalt 5 zwischen dem Stator 1 und dem Rotor 2 angeordnet ist. Die Statorseg- mente 4 sind über Trennstellen 12 miteinander verbunden, wobei der Ringmotor 10 über zwei Auflageflächen auf einem Fundament 13 ruht. Die Statorsegmente 4 weisen ein Wicklungssys¬ tem auf, welches Zähne 14, Nuten 15 und Zahnspulen 16 um- fasst . 2 shows a detail of a schematic representation of an embodiment of an electric machine according to the invention. Figure 1 shows an electrical machine according to the prior Tech ¬ technology. A ring motor 10 has a stator 1 with stator segments 4 and a rotor 2, wherein an air gap 5 is arranged between the stator 1 and the rotor 2. The stator segments 4 are connected to one another via separation points 12, wherein the ring motor 10 rests on a foundation 13 via two bearing surfaces. The stator segments 4 have a Wicklungssys ¬ TEM having teeth 14, grooves 15 and tooth coils 16 summarizes environmentally.
Figur 2 zeigt einen Ausschnitt einer Schemadarstellung einer Ausführungsform einer erfindungsgemäßen elektrischen Maschine 10. Mehrere Statorsegmente 4 sind jeweils mittels einer me¬ chanisch lösbaren Verbindung an einem Gehäusesegment 3 fi- xiert. Dabei wird ein zylinderförmiges Gehäuse durch mehrere Gehäusesegmente 3 und ein zylinderförmiger Stator 1 durch mehrere Statorsegmente 4 gebildet, wobei anhand der Verbin¬ dung ein gewünschter Statorinnendurchmesser eingestellt werden kann. Somit ist ein Luftspalt 5 zwischen dem Stator 1 und einem zylinderförmigen Rotor 2 einstellbar, wobei der einstellbare Abstand zwischen dem Rotor 2 und dem jeweiligen Statorsegment 4 mittels der mechanisch lösbaren Verbindung, beispielsweise in Form einer Schraubverbindung, wählbar ist und sinnvollerweise für jedes Statorsegment 4 gleich gewählt und eingestellt wird. Figure 2 shows a section of a schematic representation of an embodiment of an electrical machine according to the invention 10. Several stator 4 are fi xed in each case by means of a me ¬ mechanically releasable connection to a housing segment. 3 In this case, a cylindrical housing is formed by a plurality of housing segments 3 and a cylindrical stator 1 by a plurality of stator segments 4, wherein based on the connec ¬ tion, a desired stator inner diameter can be adjusted. Thus, an air gap 5 between the stator 1 and a cylindrical rotor 2 is adjustable, wherein the adjustable distance between the rotor 2 and the respective stator 4 by means of the mechanically releasable connection, for example in the form of a screw, is selectable and usefully for each stator 4 equal is selected and set.
Die Gehäusesegmente 3 sind vergleichsweise robuste und große Bauteile, da sie das erforderliche Gegendrehmoment der elekt¬ rischen Maschine 10 weiterleiten müssen, welches ihnen über die Verbindung von den Statorsegmenten 4 zugeleitet wird.The housing segments 3 are comparatively robust and large components, since they must pass on the required counter torque of the electric ¬ machine 10, which is supplied to them via the connection of the stator 4.
Auch aus Stabilitätsgründen setzt sich das Gehäuse aus vergleichsweise wenigen Gehäusesegmenten 3 zusammen, welche vergleichsweise groß gewählt werden, da Verbindungsstellen zwischen Gehäusesegmenten 3 die Tragestruktur schwächen. Also for reasons of stability, the housing is made up of comparatively few housing segments 3, which are chosen to be comparatively large, since connecting points between housing segments 3 weaken the carrying structure.
Dagegen können die Statorsegmente 4 einerseits klein im Ver¬ gleich zu den Gehäusesegmenten 3 gewählt werden, so dass mehrere Statorsegmente 4 jeweils an einem Gehäusesegment 3 fi- xiert sind. Da auf den jeweiligen Statorsegmenten 4 mehrere Wicklungen aufgebracht werden können, können die Statorsegmente 4 andererseits im Vergleich zu den Wicklungen groß aus¬ geführt werden. Beispielsweise können mehrere Dutzend Wick- lungen oder Spulen auf ein Statorsegmente 4 aufgebracht wer¬ den. Die Größe der jeweiligen Statorsegmente 4 samt den je¬ weiligen aufgebrachten Wicklungen ist vorzugsweise derart bemessen, dass jeweils das gesamte Statorsegment 4 samt aufge¬ brachten Wicklungen in einem einzigen Arbeitsschritt mittels Vakuum-Druck-Imprägnierung imprägnierbar ist, wofür es in für diesen Vorgang gängige Gefäße einführbar sein muss. In contrast, the stator 4 can on the one hand small Ver ¬ be chosen to be equal to the housing segments 3, so that a plurality of stator segments 4 fi respectively to a housing segment 3 are xed. Since a plurality of windings may be applied to the respective stator segments 4, the stator 4 on the other hand are guided in size from ¬ compared to the windings. For example, several dozen Wick- lungs or coils on a stator 4 is applied to ¬. The size of the respective stator segments 4 together with the depending ¬ weiligen applied windings is preferably dimensioned such that in each case the entire stator segment 4 together with up ¬ brought windings can be impregnated in a single step by means of vacuum-pressure impregnation, for which it in common for this process vessels must be feasible.
Für nicht dargestellte und hier aufgeführte Bezugszeichen siehe Figur 1. For not shown and listed here reference numerals see Figure 1.
Zusammenfassend betrifft die Erfindung eine elektrische Ma¬ schine mit einem Gehäuse, einem im Gehäuse angeordneten Sta¬ tor und einem innerhalb des Stators angeordneten drehbaren Rotor, wobei das Gehäuse mindestens zwei Gehäusesegmente und der Stator mindestens zwei Statorsegmente umfasst, sowie ein Verfahren zur Herstellung einer derartigen Maschine. In summary, the invention relates to an electric Ma ¬ machine with a housing, a disposed in the housing Sta ¬ tor and, disposed within the stator rotatable rotor, wherein the housing at least two housing segments and the stator comprises at least two stator segments, and a method for producing such Machine.
Um eine elektrische Maschine zu schaffen, welche bei hoher Ausgangsleistung günstige Transport- und Installationseigen- schaffen aufweist und trotz gewöhnlicher Fertigungstoleranzen ihrer Komponenten die Bewerkstelligung eines präzise einstellbaren Luftspalts erlaubt, wird vorgeschlagen, dass mit¬ tels jeweils zumindest einer mechanisch lösbaren Verbindung jedes der Statorsegmente einzeln an einem der Gehäusesegmente fixierbar ist. In order to provide an electrical machine which has create favorable transport and Installationseigen- at high output power and in spite of usual manufacturing tolerances of its components makes it possible to accomplish a precise adjustable air gap, it is proposed that with ¬ means of at least one respective mechanically detachable connection of each of the stator segments individually can be fixed to one of the housing segments.

Claims

Patentansprüche claims
1. Elektrische Maschine umfassend 1. Electrical machine comprising
- ein Gehäuse,  a housing,
- einen im Gehäuse angeordneten Stator und - A stator arranged in the housing and
- einen innerhalb des Stators angeordneten drehbaren Rotor, wobei das Gehäuse mindestens zwei Gehäusesegmente und der Stator mindestens zwei Statorsegmente umfasst,  a rotatable rotor disposed within the stator, the housing comprising at least two housing segments and the stator comprising at least two stator segments,
dadurch gekennzeichnet, dass mittels jeweils zumindest einer mechanisch lösbaren Verbindung jedes der Statorsegmente einzeln an einem der Gehäusesegmente fixierbar ist. characterized in that each of the stator segments is individually fixable to one of the housing segments by means of at least one mechanically detachable connection.
2. Elektrische Maschine nach Anspruch 1, 2. Electrical machine according to claim 1,
wobei an einem der Gehäusesegmente mindestens zwei der Sta- torsegmente fixierbar sind. wherein at least two of the stator segments can be fixed to one of the housing segments.
3. Elektrische Maschine nach einem der vorhergehenden Ansprü¬ che, 3. Electrical machine according to one of the preceding Ansprü ¬ che,
wobei ein jeweiliger Luftspalt zwischen den jeweiligen Sta- torsegmenten und dem Rotor derart mittels der jeweiligen Verbindung einstellbar ist, dass der Luftspalt für jedes der Statorsegmente gleich einem vorgebbaren Luftspalt ist. wherein a respective air gap between the respective stator segments and the rotor can be adjusted by means of the respective connection such that the air gap for each of the stator segments is equal to a predeterminable air gap.
4. Elektrische Maschine nach einem der vorhergehenden Ansprü- che, 4. Electrical machine according to one of the preceding claims,
wobei die Statorsegmente jeweils mindestens zwei Wicklungen umfassen, welche jeweils ein Teil einer Gesamtwicklung des Stators sind. wherein the stator segments each comprise at least two windings, which are each a part of a total winding of the stator.
5. Elektrische Maschine nach einem der vorhergehenden Ansprü¬ che mit einer Leistung von mehr als 10 MW. 5. Electrical machine according to one of the preceding Ansprü ¬ che with a capacity of more than 10 MW.
6. Mühle mit einer elektrischen Maschine nach einem der Ansprüche 1 bis 5. 6. Mill with an electric machine according to one of claims 1 to 5.
7. Verfahren zur Herstellung einer elektrischen Maschine, die zumindest ein Gehäuse, einen im Gehäuse angeordneten, mindes- tens zwei Statorsegmente umfassenden Stator und einen innerhalb des Stators angeordneten drehbaren Rotor aufweist, wobei das Gehäuse zumindest aus zwei Gehäusesegmenten zusam¬ mengesetzt wird, 7. A method for producing an electrical machine, the at least one housing, arranged in the housing, at least at least two stator segments comprising a stator and a rotatable rotor disposed within the stator, wherein the housing is at least composed of two housing segments together ¬ sets,
dadurch gekennzeichnet, dass jedes einzelne der Statorsegmen¬ te mittels zumindest jeweils einer mechanisch lösbaren Verbindung an einem der Gehäusesegmente fixiert wird. characterized in that each one of the Statorsegmen ¬ te is fixed by means of at least one mechanically detachable connection to one of the housing segments.
8. Verfahren nach Anspruch 7, 8. The method according to claim 7,
wobei ein jeweiliger Luftspalt zwischen den jeweiligen Statorsegmenten und dem Rotor mittels der jeweiligen Verbindung derart eingestellt wird, dass der Luftspalt für jedes der Statorsegmente gleich einem vorgebbaren Luftspalt ist. wherein a respective air gap between the respective stator segments and the rotor is adjusted by means of the respective connection such that the air gap for each of the stator segments is equal to a predeterminable air gap.
9. Verfahren nach einem der Ansprüche 7 oder 8, 9. The method according to any one of claims 7 or 8,
wobei die Statorsegmente jeweils mindestens zwei Wicklungen umfassen, welche jeweils ein Teil einer Gesamtwicklung des Stators sind und wherein the stator segments each comprise at least two windings, which are each a part of a total winding of the stator and
wobei jedes Statorsegment mittels Vakuum-Druck-Imprägnierung imprägniert wird. wherein each stator segment is impregnated by vacuum pressure impregnation.
EP12787433.7A 2011-12-15 2012-11-14 Electric machine with split casing and segmented stator Withdrawn EP2754228A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011088660A DE102011088660A1 (en) 2011-12-15 2011-12-15 Electric machine with housing and stator segments
PCT/EP2012/072585 WO2013087330A2 (en) 2011-12-15 2012-11-14 Electric machine with housing segments and stator segments

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EP (1) EP2754228A2 (en)
AU (1) AU2012351038B2 (en)
BR (1) BR112014014123A2 (en)
CA (1) CA2859270A1 (en)
CL (1) CL2014001507A1 (en)
DE (1) DE102011088660A1 (en)
WO (1) WO2013087330A2 (en)

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EP2993766A1 (en) 2014-09-08 2016-03-09 Siemens Aktiengesellschaft Improved cooling of a ring motor
EP3035500A1 (en) 2014-12-18 2016-06-22 Siemens Aktiengesellschaft Stator segment for a hollow cylindrical segmented stator of an electric machine
CN108711966B (en) * 2018-06-26 2019-12-06 新疆金风科技股份有限公司 Rotor assembly of generator and generator

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AU2012351038A1 (en) 2014-05-29
BR112014014123A2 (en) 2017-06-13
CA2859270A1 (en) 2013-06-20
AU2012351038B2 (en) 2016-06-09
DE102011088660A1 (en) 2013-06-20
WO2013087330A3 (en) 2014-05-01
WO2013087330A2 (en) 2013-06-20
US20150137653A1 (en) 2015-05-21

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