WO1997031419A1 - Ventilation system for a tube mill ring motor - Google Patents

Ventilation system for a tube mill ring motor Download PDF

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Publication number
WO1997031419A1
WO1997031419A1 PCT/DE1997/000358 DE9700358W WO9731419A1 WO 1997031419 A1 WO1997031419 A1 WO 1997031419A1 DE 9700358 W DE9700358 W DE 9700358W WO 9731419 A1 WO9731419 A1 WO 9731419A1
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WO
WIPO (PCT)
Prior art keywords
stator housing
head space
stator
air
ring motor
Prior art date
Application number
PCT/DE1997/000358
Other languages
German (de)
French (fr)
Inventor
Günter Zwarg
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU25030/97A priority Critical patent/AU2503097A/en
Publication of WO1997031419A1 publication Critical patent/WO1997031419A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing

Definitions

  • the invention is in the field of large electrical machines and can be used in the structural design of the ventilation system of a ring motor.
  • Ring motors such as those used for gearless cement tube mills (US Pat. No. 1,224,933, US Pat. No. 3,272,444) or also for pipe mills for reducing copper ore, have to be ventilated for cooling purposes because of the low motor speed.
  • the cooling air is either sucked in from the environment via filters or recirculated by air-water coolers.
  • the cooling air must be forced through the motor with one or more fans that are driven separately from the ring motor.
  • the cooling air essentially flows axially through the relatively large air gap between the rotor and stator (Siemens Journal 45 (1971), Issue 4, pages 189 to 191; Siemens Journal 49 (1975), Issue 8, Pages 542 to 546).
  • stator consists of two symmetrical lower parts and an upper part, provides for an air-water cooling unit to be arranged only in each of the two lower parts (Brown Boweri Mit. 3-70, pages 106 to 111; Brown Boveri Mit. 11-83, pages 433 to 438; TIZ-Fachberichte Vol. 110, No. 7, 1986, pages 449 to 451).
  • stator consists of four segments, an air-water cooling unit (Siemens) being assigned to each segment on both sides of the horizontal diagonal of the ring motor.
  • stator housing The usual arrangement of the air-water cooling units within the stator housing leads to a relatively large stator housing and to long cooling air passages with corresponding pressure losses within the chambers of the stator housing.
  • the invention is based on the task of simplifying the structure of the ventilation system and thereby making it more effective.
  • the fans outside the stator housing are evenly distributed on the circumference of the stator and are seated on the cover of the one winding head space in such a way that the air outlet openings of the fans are connected directly to the winding head space.
  • stator housing is no longer required for the cooling air duct, can it will be limited to its mechanical function as a support body for the Sta ⁇ tor and for the air-water cooling units and therefore be made much more compact.
  • at least one fan is assigned to each segment of the stator and is connected directly to the one winding head space of the ring motor.
  • the design of the other winding head space depends on the type of cooling selected in each case.
  • the other end of the winding head only needs to be provided with an exhaust air blind.
  • the air circuit must be closed via coolers and connections to the fans.
  • the coolers are also arranged uniformly distributed around the circumference of the stator housing and are seated on the cover of the other winding head space in such a way that their air inlet openings are connected directly to the other winding head space.
  • the recirculated air can be returned through the stator housing via axial through openings in the stator housing.
  • air guide tubes are expediently used, which connect the air outlet openings of the coolers and the air inlet openings of the fans directly to one another, that is to say axially penetrate the stator housing.
  • These air guide tubes are expediently integrated into the mechanical support structure of the stator housing.
  • the fans and, if appropriate, the coolers are arranged distributed uniformly on the circumference of the stator outside the stator housing.
  • the stator is divided into segments of the same type, at least one fan and possibly a cooler are then assigned to each stator segment.
  • a larger number of fans ensures a more even distribution of the cooling air on the engine compartment;
  • both the individual fans and the individual cooling units can be made smaller.
  • FIGS. 1 to 4. 1 shows the side view of the housing of a ring motor
  • FIG. 2 shows a first exemplary embodiment for the assignment of fan and cooler
  • FIG. 3 shows a second exemplary embodiment for the structural assignment of fan and cooler to the stator housing
  • FIG. 4 shows a possible assignment of the fan to the stator housing in the case of passage ventilation.
  • Figure 1 shows the side view of a ring motor, essentially the cover 1 of the stator and the cover 2 of the actual engine compartment can be seen.
  • the stator of the ring motor and the housing cover are divided into four segments 3, 4, 5, and 6.
  • a plurality of fans are arranged on one side of the cover 1 of the stator housing, evenly distributed over the circumference, the air outlet openings of which are connected directly to the cover 2 of the actual motor compartment, ie the one winding head space of the ring motor.
  • each fan 20 is shown arranged uniformly on the circumference of the ring motor, alternatively for segment 4, a single fan 30 and for segments 5 and 6 each have two fans 31 arranged uniformly on the circumference of the ring motor In individual cases, the arrangement of one or two or even three or four fans per segment is uniform for all segments to provide.
  • each fan is assigned a cooler, which is arranged on the other side of the cover 1 of the stator housing.
  • FIG. 2 shows a longitudinal section through the ring motor according to FIG. 1 in the area of a fan 20 with an associated cooler 23.
  • Fan 20 and cooler 23 are on both sides of the stator housing
  • stator 9 which carries the stator 10 with the associated winding heads.
  • the rotor 11 is seated on a rotor carrier (not shown), which in turn is flanged to the casing of the tube mill in a known manner.
  • the motor space covers 2 and 2 'enclose a first winding head space 12 and a second winding head space 13.
  • the fan 20 blows the cooling air through an outlet opening 21 into the winding head space 12 and presses it the cooling air through the air gap 14, from where it enters the winding head space 13 and from there via an outlet opening 24 into the cooler 23.
  • the outlet opening 25 of the cooler 23 is connected to the interior of the stator housing 9, which in turn is also connected to the inlet opening 22 of the fan 20.
  • corresponding openings 17 and 18 are provided in the stator housing.
  • the cooler 23 is also assigned a hood 27 which serves to guide the heated cooling air and in which a leakage air filter 28 can be arranged.
  • the embodiment according to FIG. 3 corresponds in principle to the embodiment according to FIG. 2; a certain difference is that the cooler 29 is placed directly on the cover 2 'of the winding head space 13 and that an air guide tube 19 is provided for returning the cooled air to the fan 20, which pipe is designed accordingly Diameter and its wall thickness is integrated in the construction of the stator housing 9.
  • a filter 33 is assigned to the fan 32 placed on the cover of the one winding space, via which the cooling air is sucked in from the outside air and then fed to the winding head space 13.
  • the cover of the winding head space 12 is provided with an exhaust air blind 26.

Abstract

In order to reduce structural expenditure on the ventilation system for a tube mill ring motor, associated with each stator segment (3, 4, 5, 6) is a ventilator (20) which is disposed centrally on the periphery, or a plurality of ventilators (20) uniformly distributed over the periphery. The ventilator(s) (20) is (are) mounted on the cover (2) of the motor chamber or of a coil end chamber (12) and its (their) air outlet openings (21) are directly connected to the latter. For circulating air ventilation, the cooling devices (20) are disposed on the cover (2') of the other coil end chamber (13) and the air inlet openings (24) of the cooling device are connected directly to this coil end chamber (13). Advantageously, the cooling devices and ventilators are connected via tubes (19) which pass axially through the stator housing (9).

Description

Beschreibungdescription
Belüftungssystem für den Ringmotor einer RohrmύhleVentilation system for the ring motor of a tube mill
Die Erfindung liegt auf dem Gebiet der elektrischen Großma¬ schinen und ist bei der konstruktiven Ausgestaltung des Be¬ lüftungssystems eines Ringmotors anzuwenden.The invention is in the field of large electrical machines and can be used in the structural design of the ventilation system of a ring motor.
Ringmotore, wie sie für getriebelose Zementrohrmühlen (US-PS 1 224 933, US-PS 3 272 444) oder auch für Rohrmühlen zur Ver¬ kleinerung von Kupfererz eingesetzt werden, müssen für Kühlzwecke wegen der geringen Motordrehzahl fremdbelüftet werden. Hierzu wird die Kühlluft entweder über Filter aus der Umgebung angesaugt oder im Umlauf über Luft-Wasser-Kühler rückgekühlt. Die Kühlluft muß dabei mit einem oder mehreren getrennt vom Ringmotor angetriebenen Lüftern durch den Motor gedrückt werden. Die Kühlluft durchströmt hierbei im wesent¬ lichen rein axial den verhältnismäßig großen Luftspalt zwi¬ schen Rotor und Stator (Siemens-Zeitschrift 45 (1971), Heft 4, Seiten 189 bis 191; Siemens-Zeitschrift 49 (1975), Heft 8, Seiten 542 bis 546) . Die Zuführung und die Abführung der Kühlluft zum und vom eigentlichen, gegenüber der Umgebung ab¬ gedichteten Motorraum, der die Rotorwicklungen und die Sta¬ torwicklungen mit ihren Wickelköpfen enthält, erfolgt etwa diametral über Blechkanäle, die in den gegeneinander abge¬ schotteten Kammern des Statorgehäuses des Ringmotors verlau¬ fen. Von einer axial außenliegenden Kammer des Statorgehäuses aus strömt die Kύhlluft über viele kleine Öffnungen in den einen Wickelkopfraum, von dort entlang des Luftspaltes in den anderen Wickelkopfraum und von dort über viele kleine Öffnun¬ gen zurück in die andere axial außenliegende Kammer des Sta¬ torgehäuses und zu den Kühlern. Je nach Aufbau des Statorge- häuses (zwei-, drei- oder vierteilig) sind dabei zwei oder mehr Luft-Wasser-Kühler vorgesehen. Eine bekannte Anordnung, bei der der Stator aus zwei symmetrischen Unterteilen und ei¬ nem Oberteil besteht, sieht vor, nur in jedem der beiden Un¬ terteile ein Luft-Wasser-Kühlaggregat anzuordnen (Brown Bove- ri Mit. 3-70, Seiten 106 bis 111; Brown Boveri Mit. 11-83, Seiten 433 bis 438; TIZ-Fachberichte Vol. 110, No. 7, 1986, Seiten 449 bis 451) . Bei einer anderen bekannten Anordnung besteht der Stator aus vier Segmenten, wobei jedem Segment beidseits der horizontalen Diagonalen des Ringmotors ein Luft-Wasser-Kühlaggregat zugeordnet ist (Siemens) .Ring motors, such as those used for gearless cement tube mills (US Pat. No. 1,224,933, US Pat. No. 3,272,444) or also for pipe mills for reducing copper ore, have to be ventilated for cooling purposes because of the low motor speed. For this purpose, the cooling air is either sucked in from the environment via filters or recirculated by air-water coolers. The cooling air must be forced through the motor with one or more fans that are driven separately from the ring motor. The cooling air essentially flows axially through the relatively large air gap between the rotor and stator (Siemens Journal 45 (1971), Issue 4, pages 189 to 191; Siemens Journal 49 (1975), Issue 8, Pages 542 to 546). The supply and discharge of the cooling air to and from the actual engine compartment, which is sealed off from the surroundings and contains the rotor windings and the stator windings with their winding heads, takes place approximately diametrically via sheet metal channels which run in the chambers of the stator housing which are sealed off from one another Ring motor run. From an axially outer chamber of the stator housing, the cooling air flows through many small openings into one winding head space, from there along the air gap into the other winding head space and from there via many small openings back into the other axially outer chamber of the stator housing and to the coolers. Depending on the structure of the stator housing (two, three or four parts), two or more air-water coolers are provided. A well-known arrangement in which the stator consists of two symmetrical lower parts and an upper part, provides for an air-water cooling unit to be arranged only in each of the two lower parts (Brown Boweri Mit. 3-70, pages 106 to 111; Brown Boveri Mit. 11-83, pages 433 to 438; TIZ-Fachberichte Vol. 110, No. 7, 1986, pages 449 to 451). In another known arrangement, the stator consists of four segments, an air-water cooling unit (Siemens) being assigned to each segment on both sides of the horizontal diagonal of the ring motor.
Die übliche Anordnung der Luft-Wasser-Kühlaggregate innerhalb des Statorgehäuses führt zu einem relativ großen Statorgehäu¬ se und zu langen Kühlluftwegen mit entsprechenden Druckverlu¬ sten innerhalb der Kammern des Statorgehäuses.The usual arrangement of the air-water cooling units within the stator housing leads to a relatively large stator housing and to long cooling air passages with corresponding pressure losses within the chambers of the stator housing.
Ausgehend von einem Ringmotor mit den Merkmalen des Oberbe¬ griffes des Patentanspruches 1 liegt der Erfindung die Aufga¬ be zugrunde, den Aufbau des Belüftungssystems zu vereinfachen und dadurch effektiver zu gestalten.Starting from a ring motor with the features of the preamble of claim 1, the invention is based on the task of simplifying the structure of the ventilation system and thereby making it more effective.
Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß die Lüfter außerhalb des Statorgehäuses gleichmäßig am Umfang des Stators verteilt angeordnet sind und auf der Ab¬ deckung des einen Wickelkopfraumes derart aufsitzen, daß die Luftaustrittsöffnungen der Lüfter direkt an den Wickelkopf¬ raum angeschlossen sind.To achieve this object it is provided according to the invention that the fans outside the stator housing are evenly distributed on the circumference of the stator and are seated on the cover of the one winding head space in such a way that the air outlet openings of the fans are connected directly to the winding head space.
Bei einer derartigen Ausgestaltung des Belüftungssystems wird auf in Umfangsrichtung und radial verlaufende Luftführungska- näle innerhalb des Statorgehäuses verzichtet, wodurch das Statorgehäuse in seinen Querschnittsabmessungen wesentlich verkleinert und damit der konstruktive Aufwand für das Sta¬ torgehäuse erheblich reduziert werden kann. Da das Statorge¬ häuse für die Kühlluftfύhrung nicht mehr benötigt wird, kann es auf seine mechanische Funktion als Tragkörper für den Sta¬ tor und für die Luft-Wasser-Kühlaggregate beschränkt werden und damit wesentlich kompakter ausgebildet sein. Dies wird dadurch erreicht, daß jedem Segment des Stators wenigstens ein Lüfter zugeordnet ist, der direkt an den einen Wickel¬ kopfraum des Ringmotors angeschlossen ist. Die Ausbildung des anderen Wickelkopfraumes hängt dabei von der jeweils gewähl¬ ten Art der Kühlung ab. Bei Durchzugsbelüftung braucht der andere Wickelkopfraum lediglich mit einer Abluftjalousie ver- sehen zu werden. Bei Umluftbelüftung ist dagegen der Luft- kreislauf über Kühler und Verbindungen zu den Lüftern zu schließen. Hierzu werden in Weiterbildung der Erfindung die Kühler ebenfalls gleichmäßig am Umfang des Statorgehäuses verteilt angeordnet und sitzen dabei auf der Abdeckung des anderen Wickelkopfraumes derart auf, daß ihre Lufteinlaßδff- nungen direkt an den anderen Wickelkopfraum angeschlossen sind. Die Rückführung der rückgekühlten Luft durch das Sta¬ torgehäuse hindurch kann über axiale Durchtrittsöffnungen im Statorgehäuse erfolgen. Zweckmäßig werden hierzu aber Luft- führungsrohre verwendet, die die Luftaustrittsöffnungen der Kühler und die Lufteintrittsöffnungen der Lüfter direkt mit¬ einander verbinden, also das Statorgehäuse axial durchsetzen. Diese Luftführungsrohre werden zweckmäßig in die mechanische Stützstruktur des Statorgehäuses integriert.In such a configuration of the ventilation system, there are no circumferential and radially extending air guiding channels within the stator housing, as a result of which the cross-sectional dimensions of the stator housing are significantly reduced and the design effort for the stator housing can be considerably reduced. Since the stator housing is no longer required for the cooling air duct, can it will be limited to its mechanical function as a support body for the Sta ¬ tor and for the air-water cooling units and therefore be made much more compact. This is achieved in that at least one fan is assigned to each segment of the stator and is connected directly to the one winding head space of the ring motor. The design of the other winding head space depends on the type of cooling selected in each case. In the case of draft ventilation, the other end of the winding head only needs to be provided with an exhaust air blind. In the case of recirculated air ventilation, on the other hand, the air circuit must be closed via coolers and connections to the fans. For this purpose, in a further development of the invention, the coolers are also arranged uniformly distributed around the circumference of the stator housing and are seated on the cover of the other winding head space in such a way that their air inlet openings are connected directly to the other winding head space. The recirculated air can be returned through the stator housing via axial through openings in the stator housing. For this purpose, however, air guide tubes are expediently used, which connect the air outlet openings of the coolers and the air inlet openings of the fans directly to one another, that is to say axially penetrate the stator housing. These air guide tubes are expediently integrated into the mechanical support structure of the stator housing.
Gemäß der Erfindung sind die Lüfter und gegebenenfalls die Kühler außerhalb des Statorgehäuses gleichmäßig am Umfang des Stators verteilt angeordnet. Bei Aufteilung des Stators in gleichartige Segmente ist dann jedem Statorsegment wenigstens ein Lüfter und gegebenenfalls ein Kühler zugeordnet. In Ab¬ hängigkeit von der Größe des Ringmotors empfiehlt es sich aber, jedem Statorsegment wenigstens zwei oder auch drei Lüf¬ ter und gegebenenfalls Kühler zuzuordnen, so daß beispiels¬ weise bei einem viersegmentigen Stator acht oder zwölf Lüfter und gegebenenfalls Kühler gleichmäßig am Umfang des Statorge¬ häuses verteilt angeordnet sind. Eine größere Anzahl von Lüf¬ tern gewährleistet eine gleichmäßigere Verteilung der Kühl- luft auf dem Motorraum; gleichzeitig können sowohl die ein- zelnen Lüfter als auch die einzelnen Kühlaggregate kleiner ausgeführt werden.According to the invention, the fans and, if appropriate, the coolers are arranged distributed uniformly on the circumference of the stator outside the stator housing. When the stator is divided into segments of the same type, at least one fan and possibly a cooler are then assigned to each stator segment. Depending on the size of the ring motor, however, it is advisable to assign at least two or even three fans and possibly coolers to each stator segment, so that, for example, in a four-segment stator, eight or twelve fans and, if appropriate, coolers are arranged distributed uniformly around the circumference of the stator housing. A larger number of fans ensures a more even distribution of the cooling air on the engine compartment; At the same time, both the individual fans and the individual cooling units can be made smaller.
Ausführungsbeispiele sind in den Figuren 1 bis 4 schematisch dargestellt. Dabei zeigt Figur 1 die Seitenansicht des Gehäuses eines Ringmotors,Exemplary embodiments are shown schematically in FIGS. 1 to 4. 1 shows the side view of the housing of a ring motor,
Figur 2 ein erstes Ausführungsbeispiel für die Zuordnung von Lüfter und Kühler,FIG. 2 shows a first exemplary embodiment for the assignment of fan and cooler,
Figur 3 ein zweites Ausführungsbeispiel für die konstrukti¬ ve Zuordnung von Lüfter und Kühler zum Statorgehäu- se undFIG. 3 shows a second exemplary embodiment for the structural assignment of fan and cooler to the stator housing and
Figur 4 eine mögliche Zuordnung von Lüfter zum Statorgehäu¬ se bei Durchzugbelüftung.FIG. 4 shows a possible assignment of the fan to the stator housing in the case of passage ventilation.
Figur 1 zeigt die Seitenansicht eines Ringmotors, wobei im wesentlichen die Abdeckung 1 des Stators und die Abdeckung 2 des eigentlichen Motorraumes zu erkennen ist. Der Stator des Ringmotors und die Gehäuseabdeckung sind in vier Segmente 3,4,5 und 6 unterteilt. Zur Belüftung des Ringmotors sind auf der einen Seite der Abdeckung 1 des Statorgehäuses gleichmä- ßig am Umfang verteilt mehrere Lüfter angeordnet, deren Luf¬ taustrittsöffnungen direkt an die Abdeckung 2 des eigentli¬ chen Motorraumes, d.h. des einen Wickelkopfraumes des Ringmo¬ tors angeschlossen sind. Für daε Segment 3 sind drei gleich¬ mäßig am Umfang des Ringmotors angeordnete Lüfter 20 darge- stellt, für das Segment 4 als Alternative ein einziger Lüfter 30 und für die Segmente 5 und 6 je zwei gleichmäßig am Umfang des Ringmotors angeordnete Lüfter 31. Im konkreten Einzelfall ist die Anordnung von jeweils einem oder zwei oder auch drei oder vier Lüftern je Segment für alle Segmente einheitlich vorzusehen. - Für den Fall einer Umluftkühlung wird jedem Lüfter ein Kühler zugeordnet, der jeweils auf der anderen Seite der Abdeckung 1 des Statorgehäuses angeordnet ist .Figure 1 shows the side view of a ring motor, essentially the cover 1 of the stator and the cover 2 of the actual engine compartment can be seen. The stator of the ring motor and the housing cover are divided into four segments 3, 4, 5, and 6. To ventilate the ring motor, a plurality of fans are arranged on one side of the cover 1 of the stator housing, evenly distributed over the circumference, the air outlet openings of which are connected directly to the cover 2 of the actual motor compartment, ie the one winding head space of the ring motor. For fan segment 3, three fans 20 are shown arranged uniformly on the circumference of the ring motor, alternatively for segment 4, a single fan 30 and for segments 5 and 6 each have two fans 31 arranged uniformly on the circumference of the ring motor In individual cases, the arrangement of one or two or even three or four fans per segment is uniform for all segments to provide. - In the case of forced-air cooling, each fan is assigned a cooler, which is arranged on the other side of the cover 1 of the stator housing.
Figur 2 zeigt einen Längsschnitt durch den Ringmotor gemäß Figur 1 im Bereich eines Lüfters 20 mit zugeordnetem Kühler 23. Lüfter 20 und Kühler 23 sind beidseits des StatorgehäusesFIG. 2 shows a longitudinal section through the ring motor according to FIG. 1 in the area of a fan 20 with an associated cooler 23. Fan 20 and cooler 23 are on both sides of the stator housing
9 angeordnet, das den Stator 10 mit den zugehörigen Wickel- köpfen trägt. Der Rotor 11 sitzt auf einem nicht näher be- zeichneten Rotorträger, der seinerseits in bekannter Weise an das Gehäuse der Rohrmühle angeflanscht ist. Zwischen Stator9 arranged, which carries the stator 10 with the associated winding heads. The rotor 11 is seated on a rotor carrier (not shown), which in turn is flanged to the casing of the tube mill in a known manner. Between stator
10 und Rotor 11 befindet sich der Luftspalt 14. - Die Motor¬ raumabdeckungen 2 und 2 ' umschließen einen ersten Wickelkopf¬ raum 12 und einen zweiten Wickelkopfraum 13. Der Lüfter 20 bläst die Kühlluft über eine Auslaßöffnung 21 in den Wickel¬ kopfraum 12, drückt die Kühlluft durch den Luftspalt 14, von wo aus sie in den Wickelkopfraum 13 und von dort über eine Auslaßöffnung 24 in den Kühler 23 gelangt. Die Austrittsöff¬ nung 25 des Kühlers 23 ist an den Innenraum des Statorgehäu- ses 9 angeschlossen, der seinerseits ebenfalls mit der Ein¬ laßöffnung 22 des Lüfters 20 verbunden ist. Hierzu sind im Statorgehäuse entsprechende Öffnungen 17 und 18 vorgesehen. - Dem Kühler 23 ist im übrigen noch eine Haube 27 zugeordnet, die der Führung der erwärmten Kühlluft dient und in der ein Leckluftfilter 28 angeordnet sein kann.10 and rotor 11 there is the air gap 14. The motor space covers 2 and 2 'enclose a first winding head space 12 and a second winding head space 13. The fan 20 blows the cooling air through an outlet opening 21 into the winding head space 12 and presses it the cooling air through the air gap 14, from where it enters the winding head space 13 and from there via an outlet opening 24 into the cooler 23. The outlet opening 25 of the cooler 23 is connected to the interior of the stator housing 9, which in turn is also connected to the inlet opening 22 of the fan 20. For this purpose, corresponding openings 17 and 18 are provided in the stator housing. - The cooler 23 is also assigned a hood 27 which serves to guide the heated cooling air and in which a leakage air filter 28 can be arranged.
Das Ausführungsbeispiel gemäß Figur 3 entspricht im Prinzip dem Ausführungsbeispiel gemäß Figur 2; ein gewisser Unter¬ schied besteht darin, daß der Kühler 29 direkt auf die Abdek- kung 2' des Wickelkopfraumes 13 aufgesetzt ist und daß zur Rückführung der gekühlten Luft zum Lüfter 20 ein Luftfüh¬ rungsrohr 19 vorgesehen ist, das durch entsprechende Bemes¬ sung seines Durchmessers und seiner Wanddicke in die Kon¬ struktion des Statorgehäuses 9 integriert ist. Bei dem Ausführungsbeispiel gemäß Figur 4 ist dem auf die Ab¬ deckung des einen Wickelraumes aufgesetzten Lüfter 32 ein Filter 33 zugeordnet, über welches die Kühlluft aus der Au¬ ßenluft angesaugt und dann dem Wickelkopfraum 13 zugeführt wird. Die Abdeckung des Wickelkopfraumes 12 ist in diesem Fall mit einer AbluftJalousie 26 versehen. The embodiment according to FIG. 3 corresponds in principle to the embodiment according to FIG. 2; a certain difference is that the cooler 29 is placed directly on the cover 2 'of the winding head space 13 and that an air guide tube 19 is provided for returning the cooled air to the fan 20, which pipe is designed accordingly Diameter and its wall thickness is integrated in the construction of the stator housing 9. In the exemplary embodiment according to FIG. 4, a filter 33 is assigned to the fan 32 placed on the cover of the one winding space, via which the cooling air is sucked in from the outside air and then fed to the winding head space 13. In this case, the cover of the winding head space 12 is provided with an exhaust air blind 26.

Claims

Patentansprüche claims
1. Ringmotor für eine Rohrmühle, bei dem der Motorraum, der die Rotorwicklungen und die Sta- torwicklungen mit ihren Wickelköpfen enthält, gegenüber der Umgebung abgedichtet ist und bei dem dem Statorgehäuse mehre¬ re Lüfter zugeordnet sind, deren Austrittsöffnungen belüf¬ tungstechnisch mit dem einen Wickelkopfraum verbunden sind, d a d u r c h g e k e n n z e i c h n e t , daß die Lüfter außerhalb des Statorgehäuses (9) gleichmäßig am Umfang des Stators (9,10) verteilt angeordnet sind und auf der Abdeckung (2) des einen Wickelkopfraumes (12) derart auf¬ sitzen, daß die Luftaustrittsöffnungen (21) der Lüfter (20) direkt an den Wickelkopfraum (12) angeschlossen sind.1. Ring motor for a tube mill, in which the motor space, which contains the rotor windings and the stator windings with their winding heads, is sealed off from the surroundings and in which several fans are assigned to the stator housing, the outlet openings of which are ventilated with one Are connected winding head space, characterized in that the fans outside the stator housing (9) are evenly distributed on the circumference of the stator (9, 10) and sit on the cover (2) of the one winding head space (12) such that the air outlet openings ( 21) the fan (20) are connected directly to the winding head space (12).
2. Ringmotor nach Anspruch 1 mit einem aus Segmenten aufge¬ bauten Statorgehäuse, d a d u r c h g e k e n n z e i c h n e t , daß jedem Segment (3,4,5,6) des Statorgehäuses (9) wenigstens zwei Lüfter (20,31) zugeordnet sind.2. Ring motor according to claim 1 with a built up from segments stator housing, so that each segment (3, 4, 5, 6) of the stator housing (9) is assigned at least two fans (20, 31).
3. Ringmotor nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß der andere Wickelkopfraum (12, Fig. 4) mit einer Abluftjalou- sie (26) versehen ist.3. Ring motor according to claim 1 or 2, so that the other winding head space (12, Fig. 4) is provided with an exhaust air blind (26).
4. Ringmotor nach Anspruch 1 oder 2 mit dem anderen Wickel¬ kopfraum zugeordneten Kühlern, d a d u r c h g e k e n n z e i c h n e t , daß die Kühler (23,29) ebenfalls gleichmäßig am Umfang des Sta¬ torgehäuses (9) verteilt angeordnet sind und auf der Abdek- kung (21) des anderen Wickelkopfraumes (13) derart aufsitzen, das ihre Lufteinlaßöffnungen direkt an den Wickelkopfraum (13) angeschlossen sind. 4. Ring motor according to claim 1 or 2 with the other Wickel¬ head space associated coolers, characterized in that the coolers (23, 29) are also distributed uniformly around the circumference of the stator housing (9) and on the cover (2 1 ) of the other winding head space (13) sit in such a way that their air inlet openings are connected directly to the winding head space (13).
5. Ringmotor nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß die Luftaustrittsόffnungen der Kühler (29) und die Luftein- trittsöffnungen der Lüfter (20) über Luftführungsrohre (19) verbunden sind, die das Statorgehäuse (9) axial durchsetzen. 5. Ring motor according to claim 4, so that the air outlet openings of the cooler (29) and the air inlet openings of the fans (20) are connected via air guide tubes (19) which axially penetrate the stator housing (9).
PCT/DE1997/000358 1996-02-23 1997-02-21 Ventilation system for a tube mill ring motor WO1997031419A1 (en)

Priority Applications (1)

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DE1996108286 DE19608286B4 (en) 1996-02-23 1996-02-23 Ventilation system for the ring motor of a tube mill
DE19608286.2 1996-02-23

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DE19943150A1 (en) * 1999-09-09 2001-03-22 Siemens Ag Ore mill and method for operating the ore mill
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US6882068B2 (en) * 2002-10-08 2005-04-19 General Electric Company Forced air stator ventilation system and stator ventilation method for superconducting synchronous machine
DE102005045347A1 (en) * 2005-09-22 2007-04-05 Siemens Ag Tooth module for primary parts of permanent magnet synchronous motors
DE102008050848A1 (en) * 2008-10-08 2010-04-15 Wobben, Aloys ring generator
EP2993766A1 (en) * 2014-09-08 2016-03-09 Siemens Aktiengesellschaft Improved cooling of a ring motor

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Publication number Priority date Publication date Assignee Title
US20150137653A1 (en) * 2011-12-15 2015-05-21 Siemens Ag Electric machine with housing segments and stator segments

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DE19608286B4 (en) 2004-02-12
AU2503097A (en) 1997-09-10

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