DE102010034168B3 - Rotary machine i.e. steam turbine, has laminated component provided on stator side, and sleeve-shaped thermally insulating element arranged between shaft and metal sheet case and conically fixed at conically formed region of shaft - Google Patents
Rotary machine i.e. steam turbine, has laminated component provided on stator side, and sleeve-shaped thermally insulating element arranged between shaft and metal sheet case and conically fixed at conically formed region of shaft Download PDFInfo
- Publication number
- DE102010034168B3 DE102010034168B3 DE102010034168A DE102010034168A DE102010034168B3 DE 102010034168 B3 DE102010034168 B3 DE 102010034168B3 DE 102010034168 A DE102010034168 A DE 102010034168A DE 102010034168 A DE102010034168 A DE 102010034168A DE 102010034168 B3 DE102010034168 B3 DE 102010034168B3
- Authority
- DE
- Germany
- Prior art keywords
- shaft
- insulating element
- thermally insulating
- sleeve
- rotary machine
- 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.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/14—Casings modified therefor
- F01D25/145—Thermally insulated casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0468—Details of the magnetic circuit of moving parts of the magnetic circuit, e.g. of the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/047—Details of housings; Mounting of active magnetic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/50—Bearings
- F05D2240/51—Magnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/20—Thermal properties
- F16C2202/24—Insulating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/10—Force connections, e.g. clamping
- F16C2226/16—Force connections, e.g. clamping by wedge action, e.g. by tapered or conical parts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
Description
Die vorliegende Erfindung befasst sich mit einer Rotationsmaschine, insbesondere einer Dampfturbine, aufweisend eine drehbare Welle und mindestens zwei Lagerungen der Welle, wobei wenigstens eine der mindestens zwei Lagerungen der Welle als Magnetlager ausgebildet ist, wobei das Magnetlager einen die Welle umgebenden Magnetlagerstator aufweist, wobei eine umlaufend an der Welle angeordnete Blechungshülse vorgesehen ist, an der statorseitig umlaufend eine Blechung vorgesehen ist, wobei zwischen dem Magnetlagerstator und der Blechung beziehungsweise der Blechungshülse ein Luftspalt gebildet ist.The present invention relates to a rotary machine, in particular a steam turbine, comprising a rotatable shaft and at least two bearings of the shaft, wherein at least one of the at least two bearings of the shaft is formed as a magnetic bearing, wherein the magnetic bearing has a shaft surrounding the magnetic bearing stator, wherein a circumferentially arranged on the shaft sheet metal sleeve is provided, on the stator side circumferentially a sheet metal is provided, wherein between the magnetic bearing stator and the sheet metal or the Blechungshülse an air gap is formed.
Bei der Verwendung von Magnetlagern für Rotationsmaschinen, insbesondere Dampfturbinen, darf die Blechung des Rotors eine bestimmte Temperatur, vorzugsweise eine Temperatur von 220°C, nicht überschreiten. Bei hohen Temperaturen besteht die Gefahr, dass die Isolation innerhalb der Blechung zerstört wird. Insbesondere bei Dampfturbinen wird jedoch über die Welle eine sehr hohe Warmeenergie in den Bereich der Lagerung der Welle ubertragen, so dass beispielsweise eine Temperatur von 220°C deutlich überschritten werden kann.When using magnetic bearings for rotary machines, in particular steam turbines, the lamination of the rotor must not exceed a certain temperature, preferably a temperature of 220 ° C. At high temperatures there is a risk that the insulation within the lamination will be destroyed. However, especially in the case of steam turbines, a very high heat energy is transmitted via the shaft into the area of the bearing of the shaft, so that, for example, a temperature of 220 ° C. can be clearly exceeded.
Aus der
Desweiteren ist bekannt, die Blechung auf einer Hülse anzuordnen, die mit Kühlkanalen durchzogen ist. Auch in dieser Ausfertigung wird die Blechung durch ein extern zugeführtes Kühlfluid aktiv gekühlt.Furthermore, it is known to arrange the sheet metal on a sleeve which is traversed by cooling channels. Also in this version, the sheet is actively cooled by an externally supplied cooling fluid.
Beiden Lösungen haben gemeinsam, dass das Kühlfluid in ein rotierendes Bauteil, die Welle beziehungsweise die damit verbundene Hülse, zu überführen ist. Dies ist technisch aufwendig und dadurch sehr kostenintensiv.Both solutions have in common that the cooling fluid is to be converted into a rotating component, the shaft or the associated sleeve. This is technically complicated and therefore very expensive.
Aus den Schriften
In der
Aufgabe der Erfindung ist es, eine magnetgelagerte Rotationsmaschine der eingangs beschriebenen Art zu schaffen, bei der die Blechung möglichst kühl bleibt, insbesondere, bei der die Temperatur der Blechung 220°C nicht übersteigt. Dabei soll die Rotationsmaschine konstruktiv einfach sein und eine einfache Montage der erforderlichen Bauteile ermöglichen.The object of the invention is to provide a magnetic bearing rotary machine of the type described above, in which the lamination remains as cool as possible, in particular, in which the temperature of the lamination does not exceed 220 ° C. The rotation machine should be structurally simple and allow easy assembly of the required components.
Diese Aufgabe wird erfindungsgemäß durch eine Rotationsmaschine mit den Merkmalen gemäß dem unabhängigen Anspruch 1 der Patentanmeldung gelöst. Weitere Merkmale und Details der Erfindung ergeben sich aus den Unteransprüchen, der Beschreibung und der beigefügten Zeichnung.This object is achieved by a rotary machine with the features of the independent claim 1 of the patent application. Further features and details of the invention will become apparent from the dependent claims, the description and the accompanying drawings.
Die Aufgabe wird durch eine Rotationsmaschine der eingangs genannten Art gelöst, wobei zwischen der Welle und der Blechungshülse ein thermisch isolierendes Element angeordnet ist. Durch dieses thermisch isolierende Element wird ein Wärmetransport von der Welle der Rotationsmaschine zur Blechungshülse und damit zur Blechung verhindert oder zumindest stark eingeschränkt. Zusammen mit der Kühlwirkung des Luftspalts zwischen Blechung und Magnetlagerstator kann eine Aufheizung der Blechung und eine im Extremfall damit verbundene Zerstörung der Isolierung in der Blechung vermieden werden. Insbesondere ist das thermisch isolierende Element derart ausgebildet, dass dieses im Zusammenspiel mit der Kühlwirkung des Luftspalts verhindert, dass in der Blechung eine hohe Temperatur, insbesondere eine Temperatur von 220°C oder höher auftritt.The object is achieved by a rotary machine of the aforementioned type, wherein a thermally insulating element is arranged between the shaft and the laminating sleeve. As a result of this thermally insulating element, heat transfer from the shaft of the rotary machine to the sheet-metal sleeve and thus to the lamination is prevented or at least severely restricted. Together with the cooling effect of the air gap between the sheet and magnetic bearing stator heating of the sheet metal and in extreme cases associated destruction of the insulation in the sheet can be avoided. In particular, the thermally insulating element is designed such that this prevents, in conjunction with the cooling effect of the air gap, that in the sheet a high temperature, in particular a temperature of 220 ° C or higher occurs.
Gemäß der Erfindung ist bei der Rotationsmaschine Vorgesehen, dass das thermisch isolierende Element hülsenartig ausgeformt ist. Damit ist eine thermische Isolierung der Blechungshülse gegenüber der Welle über deren gesamten Umfang möglich, der Wärmetransport in die Blechungshülse und damit in die Blechung wird dadurch weiter minimiert.According to the invention, it is provided in the rotary machine that the thermally insulating element is formed like a sleeve. Thus, a thermal insulation of the lamination sleeve relative to the shaft over its entire circumference is possible, the heat transfer in the lamination sleeve and thus in the lamination is further minimized.
Zusätzlich ist bei der Rotationsmaschine vorgesehen, das als Hülse ausgeformte thermisch isolierende Element zur Fixierung an einem konisch ausgebildeten Bereich der Welle ebenfalls konisch auszubilden. Die in Passform ausgebildeten Bereiche der Welle und der thermisch isolierenden Hülse können zur Montage einfach aufeinander geschoben werden. Dadurch wird die Montage deutlich erleichtert. Die thermisch isolierende Hülse kann auf den entsprechend konisch ausgebildeten Bereich der Welle unter Bildung einer Presspassung aufgebracht sein.In addition, in the case of the rotary machine, it is likewise provided that the thermally insulating element designed as a sleeve also has a conical shape for fixing to a conically shaped region of the shaft. The formed in fit areas of the shaft and the thermally insulating sleeve can be easily pushed together for mounting. As a result, the assembly is much easier. The thermally insulating sleeve may be applied to the corresponding conical portion of the shaft to form a press fit.
In einer weiteren bevorzugten Ausbildung der Erfindung kann das thermisch isolierende Element druckfest ausgestaltet sein. Dies ermöglicht insbesondere eine stabile Befestigung der Blechungshülse an der Welle. Desweiteren werden Verluste vermieden, die durch ein Walken des thermisch isolierenden Elementes entstehen würden.In a further preferred embodiment of the invention, the thermally insulating element can be made pressure-resistant. This allows in particular a stable attachment of the laminating sleeve on the shaft. Furthermore, losses are avoided that would be caused by a walking of the thermally insulating element.
Bevorzugt besteht das thermisch isolierende Element aus einer Keramik oder umfasst zumindest teilweise eine Keramik. Keramiken sind äußerst hitzebeständig und werden daher zum Beispiel auch in den Hitzeschilden von Space Shuttles verwendet. Desweiteren sind sie unelastisch und auf Druck sehr belastbar. Damit sind Keramiken für die zumindest teilweise Verwendung im erfindungsgemäßen thermisch isolierenden Element hervorragend geeignet. Insbesondere kann die Wandstärke des keramisch ausgebildeten thermisch isolierenden Elementes derart angepasst sein, dass das thermisch isolierende Element eine derartige Kühlwirkung erzeugt, die ermöglicht, dass die Temperatur in der Blechung der Blechungshülse 220°C nicht überschreitet. Die Wandstärke des thermisch isolierenden Elementes kann je nach Größe der Rotationsmaschine variieren.The thermally insulating element preferably consists of a ceramic or at least partially comprises a ceramic. Ceramics are extremely heat-resistant and are therefore used, for example, in the heat shields of space shuttles. Furthermore, they are inelastic and very resilient to pressure. Thus, ceramics for at least partial use in the thermally insulating element according to the invention are outstandingly suitable. In particular, the wall thickness of the ceramic-formed thermally insulating element can be adapted such that the thermally insulating element produces such a cooling effect that allows the temperature in the lamination of the laminating sleeve does not exceed 220 ° C. The wall thickness of the thermally insulating element may vary depending on the size of the rotary machine.
Gemäß einer weiteren bevorzugten Weiterentwicklung der Erfindung kann bei der Rotationsmaschine vorgesehen sein, dass die Blechung in einer umlaufenden Nut der Blechungshülse sitzt. Die Blechung ist dadurch sicher an der Blechungshülse gehalten.According to a further preferred development of the invention, it can be provided in the rotary machine that the sheet metal is seated in a circumferential groove of the laminating sleeve. The sheet is thereby held securely on the lamination sleeve.
In einer besonders bevorzugten Ausgestaltung der Erfindung ist die Rotationsmaschine eine Dampfturbine. Vor allem in Dampfturbinen ist der Wärmeeintrag durch die Welle in den Bereich der Lagerung der Welle sehr groß. Durch die erfindungsgemäße Ausgestaltung der Dampfturbine wird verhindert, dass die Isolation in der Blechung zerstört wird.In a particularly preferred embodiment of the invention, the rotary machine is a steam turbine. Especially in steam turbines, the heat input through the shaft in the area of storage of the shaft is very large. The inventive design of the steam turbine prevents the insulation is destroyed in the sheet metal.
Die beigefügte Figur und die Figurenbeschreibung dienen dem besseren Verständnis der erfindungsgemäßen Rotationsmaschine. Gegenstände oder Teile von Gegenständen, die im Wesentlichen gleich oder ähnlich sind, sind mit denselben Bezugszeichen versehen. Die Figur ist lediglich eine schematische Darstellung einer möglichen Ausführungsform der Erfindung. Dabei zeigtThe attached figure and the description of the figures serve for a better understanding of the rotary machine according to the invention. Articles or parts of objects that are substantially the same or similar are given the same reference numerals. The figure is merely a schematic representation of a possible embodiment of the invention. It shows
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010034168A DE102010034168B3 (en) | 2010-08-13 | 2010-08-13 | Rotary machine i.e. steam turbine, has laminated component provided on stator side, and sleeve-shaped thermally insulating element arranged between shaft and metal sheet case and conically fixed at conically formed region of shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010034168A DE102010034168B3 (en) | 2010-08-13 | 2010-08-13 | Rotary machine i.e. steam turbine, has laminated component provided on stator side, and sleeve-shaped thermally insulating element arranged between shaft and metal sheet case and conically fixed at conically formed region of shaft |
Publications (1)
Publication Number | Publication Date |
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DE102010034168B3 true DE102010034168B3 (en) | 2012-02-23 |
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DE102010034168A Expired - Fee Related DE102010034168B3 (en) | 2010-08-13 | 2010-08-13 | Rotary machine i.e. steam turbine, has laminated component provided on stator side, and sleeve-shaped thermally insulating element arranged between shaft and metal sheet case and conically fixed at conically formed region of shaft |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110015395A (en) * | 2018-11-29 | 2019-07-16 | 南京海琦娜游艇制造有限公司 | Magnetic suspension rudder peculiar to vessel system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5321329A (en) * | 1993-03-25 | 1994-06-14 | Hovorka Patent Trust | Permanent magnet shaft bearing |
DE4444587A1 (en) * | 1994-12-14 | 1996-06-20 | Siemens Ag | Turbine with a magnetically supported shaft |
WO2002031371A1 (en) * | 2000-10-09 | 2002-04-18 | Siemens Aktiengesellschaft | Device comprising a rotor and a magnetic suspension bearing for the contactless bearing of the rotor |
DE10042962C1 (en) * | 2000-08-31 | 2002-05-02 | Siemens Ag | Magnetic bearing to support a rotatable shaft using high-T¶c¶ superconductor material |
DE10244651A1 (en) * | 2001-11-07 | 2003-05-22 | Siemens Ag | Magnetic bearing unit with a high-temperature superconductor material for a rotor shaft, comprises a tubular carrier element with inner and outer pipes which bound a thermal insulation space |
EP2110572A1 (en) * | 2008-04-16 | 2009-10-21 | Siemens Aktiengesellschaft | Cooling of the rotor lamination of a magnetic bearing |
-
2010
- 2010-08-13 DE DE102010034168A patent/DE102010034168B3/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5321329A (en) * | 1993-03-25 | 1994-06-14 | Hovorka Patent Trust | Permanent magnet shaft bearing |
DE4444587A1 (en) * | 1994-12-14 | 1996-06-20 | Siemens Ag | Turbine with a magnetically supported shaft |
DE10042962C1 (en) * | 2000-08-31 | 2002-05-02 | Siemens Ag | Magnetic bearing to support a rotatable shaft using high-T¶c¶ superconductor material |
WO2002031371A1 (en) * | 2000-10-09 | 2002-04-18 | Siemens Aktiengesellschaft | Device comprising a rotor and a magnetic suspension bearing for the contactless bearing of the rotor |
DE10244651A1 (en) * | 2001-11-07 | 2003-05-22 | Siemens Ag | Magnetic bearing unit with a high-temperature superconductor material for a rotor shaft, comprises a tubular carrier element with inner and outer pipes which bound a thermal insulation space |
EP2110572A1 (en) * | 2008-04-16 | 2009-10-21 | Siemens Aktiengesellschaft | Cooling of the rotor lamination of a magnetic bearing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110015395A (en) * | 2018-11-29 | 2019-07-16 | 南京海琦娜游艇制造有限公司 | Magnetic suspension rudder peculiar to vessel system |
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Effective date: 20120524 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |