EP1703080A1 - Rotating machine - Google Patents

Rotating machine Download PDF

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Publication number
EP1703080A1
EP1703080A1 EP06110074A EP06110074A EP1703080A1 EP 1703080 A1 EP1703080 A1 EP 1703080A1 EP 06110074 A EP06110074 A EP 06110074A EP 06110074 A EP06110074 A EP 06110074A EP 1703080 A1 EP1703080 A1 EP 1703080A1
Authority
EP
European Patent Office
Prior art keywords
groove
rotor shaft
annular groove
stator
circumferential annular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP06110074A
Other languages
German (de)
French (fr)
Inventor
Andrea De Simone
Jonas Fältström
Holger Kiewel
Thomas Kramer
Markus Roland Wiebe
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.)
Ansaldo Energia IP UK Ltd
Original Assignee
Alstom Technology 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 Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP1703080A1 publication Critical patent/EP1703080A1/en
Ceased legal-status Critical Current

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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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
    • 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
    • F05D2240/60—Shafts
    • 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
    • F05D2250/00—Geometry
    • F05D2250/10—Two-dimensional
    • F05D2250/14—Two-dimensional elliptical

Definitions

  • the present invention relates to the field of rotary machines. It relates to a rotating machine according to the preamble of claim 1.
  • the at least one groove has a groove bottom with an elliptical cross-sectional contour.
  • the groove can thereby run in the axial direction, as is the case with the fir tree grooves of compressor or turbine blades.
  • the groove can also be designed as a circumferential annular groove or circumferential groove and also serve the attachment of compressor or turbine blades.
  • the at least one groove is a concentrically encircling annular groove, the major axis of the ellipse extending in the axial direction and the small main axis in the radial direction.
  • a development of this embodiment is characterized in that the rotor shaft is concentrically surrounded at a distance from a stator, that the at least one circumferential annular groove is part of a arranged between the stator and rotor shaft shaft seal, and that each circumferential annular groove is associated with at least one sealing element, which on Stator is attached and sealingly engages in the associated circumferential annular groove in the sense of a labyrinth seal.
  • the sealing elements are preferably designed as strip seals or brush seals.
  • a development of this embodiment is characterized in that the rotating machine is a compressor or a turbine that the rotor shaft is provided for receiving blades, and that the at least one circumferential annular groove for receiving and holding the feet of the blades is formed. Undercuts for retaining the blade root are preferably arranged in the at least one circumferential annular groove above the groove bottom.
  • a longitudinal section through a rotating machine with a shaft seal according to an embodiment of the invention is shown in a section.
  • the rotating machine 10 for example a compressor or a turbine, comprises a rotor shaft 11 rotatable about an axis 20, which is concentrically enclosed by a stator 12 at a distance. Between the rotor shaft 11 and the stator 12 remains due to the distance, a gap which is sealed in the axial direction by means of a shaft seal 16 against the passage of a fluid.
  • the shaft seal 16 is constructed in the manner of a labyrinth seal in this example.
  • the rotor shaft 11 comprises on the outer circumference of the rotor shaft 11 a plurality of in the axial direction one behind the other, circumferential annular grooves 14, in the radially projecting from the inner wall of the stator 12 sealing elements 15 immerse sealing.
  • the sealing elements 15 may be, for example, weather strips or brush seals.
  • the annular grooves 15 basically weaken the mechanical strength of the rotor shaft 11.
  • the groove bottom 17 of the annular grooves 15 an elliptical cross-sectional contour, ie, the cross-sectional contour is part of an ellipse 24, which is shown in dashed lines in Fig. 1.
  • the major axis of the ellipse 24 is oriented in the axial direction, the small major axis in the radial direction. This has the consequence that the curvature of the bottom contour of the groove bottom 17 in the middle of the groove bottom 17 (below the sealing member 15) has a minimum and increases toward the edges of the annular groove in accordance with the elliptical equation. In the production of the annular grooves 14, this contour profile is machined out of the rotor shaft 11 in accordance with the ellipse equation.
  • FIG. 2 Another embodiment of the invention is shown in Fig. 2 and relates directly to a turbine or a compressor.
  • the rotating machine 18 includes a rotor shaft 19, which is formed in this case for mounting of rotor blades.
  • a plurality of deep, circumferential annular grooves 21 are arranged on the circumference of the rotor shaft 19 in the axial direction one behind the other, which are provided for receiving the feet of the blades, as shown for example in the aforementioned document US-A-4,818,182.
  • Each of the annular grooves 21 is provided at a predetermined depth with double-sided undercuts 22 on which the blade roots can be supported against the centrifugal forces and retained.
  • the side walls of the annular grooves 21 extend a short distance vertically and then pass into a groove bottom 23 whose cross-sectional contour is also part of an ellipse 24 lying in the axial direction with the large main axis.
  • an elliptical bottom contour is not limited only to a circumferential groove for blades, as shown in Fig. 2. It can also be used with Tannenbaum type axial blade grooves to reduce the stresses in the groove bottom.

Abstract

The machine has a rotor shaft (19) which is rotated about an axis and includes a slot, where the slot has a slot bottom with an elliptic cross-sectional contour. A stator concentrically surrounds the rotor shaft at a distance, and a shaft seal is arranged between the stator and the shaft, where the seal comprises a continuous annular slot (21). A sealing component is provided for each of the annular slots.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die vorliegende Erfindung bezieht sich auf das Gebiet der rotierenden Maschinen. Sie betrifft eine rotierende Maschine gemäss dem Oberbegriff des Anspruchs 1.The present invention relates to the field of rotary machines. It relates to a rotating machine according to the preamble of claim 1.

STAND DER TECHNIKSTATE OF THE ART

Bei thermisch und mechanisch hochbelasteten Maschinen, wie sie beispielsweise Verdichter, Gasturbinen oder Dampfturbinen darstellen, ist es wünschenswert, durch eine geeignete konstruktive Auslegung der einzelnen Maschinen- und Anlagenteile mechanische Spannungen zu verringern.In thermally and mechanically highly loaded machines, such as compressors, gas turbines or steam turbines represent, it is desirable to reduce mechanical stress by a suitable structural design of the individual machine and system parts.

So ist es aus dem Stand der Technik beispielsweise bekannt (siehe die EP-A1-0 945 594 oder die US-B1-6,478,539) bei den Laufschaufeln von Gasturbinen den Übergang vom Schaufelblatt zur darunterliegenden, anschliessenden Plattform der Schaufel mit einer vorausbestimmten, vorzugsweise elliptischen Krümmungskontur auszubilden, wobei die grosse Hauptachse in radialer Richtung verläuft und die kleine Hauptachse parallel zur Oberfläche der Plattform orientiert ist.For example, it is known from the prior art (see EP-A1-0 945 594 or US-B1-6,478,539) in the blades of gas turbines the Transition from the blade to the underlying, subsequent platform of the blade with a predetermined, preferably elliptical curve contour, wherein the major axis is in the radial direction and the small main axis is oriented parallel to the surface of the platform.

Weiterhin ist es aus der US-B1-6,237,558 bekannt, bestimmte, bezüglich mechanischer Spannungen kritische Stellen des Kurbelgehäuses einer Verbrennungskraftmaschine mit einer Krümmung zu versehen, die einem Kegelschnitt (Ellipse, Hyperbel, Parabel) folgt.Furthermore, it is known from US-B1-6,237,558 to provide certain, critical with respect to mechanical stress points of the crankcase of an internal combustion engine with a curvature following a conic (ellipse, hyperbola, parabola).

Nicht nur die Laufschaufeln von Turbinen sind aufgrund der hohen Drehzahlen hohen mechanischen Belastungen ausgesetzt, sondern auch die Rotorwelle selbst. Kritische Stellen sind dabei vor allem die auf dem äusseren Umfang angeordneten Nute in der Rotorwelle, die in axialer Richtung verlaufend oder ringförmig umlaufend beispielsweise zur Aufnahme der Schaufelfüsse der Laufschaufeln oder als Teil einer Wellendichtung vorgesehen sein können. Bei solchen Nuten hängen die in der Nut auftretenden Spannungen massgeblich von der Querschnittskontur ab. Aus der GB-A-2 265 671 oder der US-A-4,818,182 sind ringförmig umlaufende Nuten zur Befestigung von Laufschaufeln bekannt, die eine abgerundete Querschnittskontur aufweisen. Angaben über die Art des Krümmungsverlaufs bzw. den Einfluss der Kontur auf die Spannungen in der Nut werden nicht gemacht.Not only the blades of turbines are exposed to high mechanical loads due to the high rotational speeds, but also the rotor shaft itself. Critical places are mainly on the outer circumference arranged groove in the rotor shaft, extending in the axial direction or annularly rotating, for example, for receiving the blade roots of the blades or may be provided as part of a shaft seal. In such grooves, the stresses occurring in the groove depend significantly on the cross-sectional contour. GB-A-2 265 671 or US-A-4 818 182 discloses annular circumferential grooves for mounting blades having a rounded cross-sectional contour. Information about the type of curvature or the influence of the contour on the stresses in the groove are not made.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Es ist daher Aufgabe der Erfindung, eine rotierende Maschine mit einer Nuten aufweisenden Rotorwelle so zu gestalten, dass die Spannungen im Nutenbereich deutlich reduziert werden.It is therefore an object of the invention to design a rotating machine with a rotor shaft having grooves so that the stresses in the groove area are significantly reduced.

Die Aufgabe wird durch die Gesamtheit der Merkmale des Anspruchs 1 gelöst. Wesentlich ist dabei, dass die wenigstens eine Nut einen Nutboden mit einer elliptischen Querschnittskontur aufweist. Die Nut kann dabei in axialer Richtung verlaufen, wie dies bei den Tannenbaumnuten von Verdichter- oder Turbinen-Laufschaufeln der Fall ist. Die Nut kann aber auch als umlaufende Ringnut bzw. Umfangsnut ausgebildet sein und ebenfalls der Befestigung von Verdichter- oder Turbinen-Laufschaufeln dienen.The object is solved by the entirety of the features of claim 1. It is essential that the at least one groove has a groove bottom with an elliptical cross-sectional contour. The groove can thereby run in the axial direction, as is the case with the fir tree grooves of compressor or turbine blades. However, the groove can also be designed as a circumferential annular groove or circumferential groove and also serve the attachment of compressor or turbine blades.

Gemäss einer Ausgestaltung der Erfindung ist die wenigstens eine Nut eine konzentrisch umlaufenden Ringnut, wobei die grosse Hauptachse der Ellipse in axialer Richtung und die kleine Hauptachse in radialer Richtung verlaufen.According to one embodiment of the invention, the at least one groove is a concentrically encircling annular groove, the major axis of the ellipse extending in the axial direction and the small main axis in the radial direction.

Eine Weiterbildung dieser Ausgestaltung zeichnet sich dadurch aus, dass die Rotorwelle mit Abstand von einem Stator konzentrisch umgeben ist, dass die wenigstens eine umlaufende Ringnut Teil einer zwischen Stator und Rotorwelle angeordneten Wellendichtung ist, und dass jeder umlaufenden Ringnut wenigstens ein Dichtungselement zugeordnet ist, welches am Stator befestigt ist und in die zugehörige umlaufende Ringnut im Sinne einer Labyrinthdichtung dichtend eingreift.A development of this embodiment is characterized in that the rotor shaft is concentrically surrounded at a distance from a stator, that the at least one circumferential annular groove is part of a arranged between the stator and rotor shaft shaft seal, and that each circumferential annular groove is associated with at least one sealing element, which on Stator is attached and sealingly engages in the associated circumferential annular groove in the sense of a labyrinth seal.

Die Dichtungselemente sind dabei vorzugsweise als Streifendichtungen oder Bürstendichtungen ausgebildet.The sealing elements are preferably designed as strip seals or brush seals.

Eine Weiterbildung dieser Ausgestaltung zeichnet sich dadurch aus, dass die rotierende Maschine ein Verdichter oder eine Turbine ist, dass die Rotorwelle zur Aufnahme von Laufschaufeln vorgesehen ist, und dass die wenigstens eine umlaufende Ringnut zur Aufnahme und Halterung der Füsse der Laufschaufeln ausgebildet ist. Bevorzugt sind in der wenigstens einen umlaufenden Ringnut oberhalb des Nutbodens Hinterschneidungen zum Zurückhalten des Schaufelfusses angeordnet.A development of this embodiment is characterized in that the rotating machine is a compressor or a turbine that the rotor shaft is provided for receiving blades, and that the at least one circumferential annular groove for receiving and holding the feet of the blades is formed. Undercuts for retaining the blade root are preferably arranged in the at least one circumferential annular groove above the groove bottom.

KURZE ERLÄUTERUNG DER FIGURENBRIEF EXPLANATION OF THE FIGURES

Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen im Zusammenhang mit der Zeichnung näher erläutert werden. Es zeigen

Fig. 1
in einem Ausschnitt einen Längsschnitt durch eine rotierende Maschine mit einer Wellendichtung gemäss einem Ausführungsbeispiel der Erfindung; und
Fig. 2
in einer zu Fig. 1 vergleichbaren Darstellung eine Turbine oder einen Verdichter mit ringförmig umlaufenden Nuten zur Aufnahme der Füsse von Laufschaufeln gemäss einem anderen Ausführungsbeispiel der Erfindung.
The invention will be explained in more detail with reference to embodiments in conjunction with the drawings. Show it
Fig. 1
in a section of a longitudinal section through a rotating machine with a shaft seal according to an embodiment of the invention; and
Fig. 2
in a representation comparable to Fig. 1, a turbine or a compressor with annular circumferential grooves for receiving the feet of blades according to another embodiment of the invention.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

In Fig. 1 ist in einem Ausschnitt ein Längsschnitt durch eine rotierende Maschine mit einer Wellendichtung gemäss einem Ausführungsbeispiel der Erfindung wiedergegeben. Die rotierende Maschine 10, z.B. ein Verdichter oder eine Turbine, umfasst eine um eine Achse 20 drehbare Rotorwelle 11, die mit Abstand von einem Stator 12 konzentrisch umschlossen ist. Zwischen der Rotorwelle 11 und dem Stator 12 verbleibt aufgrund des Abstandes ein Zwischenraum, der in axialer Richtung mittels einer Wellendichtung 16 gegen das Durchströmen eines Fluids abgedichtet ist. Die Wellendichtung 16 ist in diesem Beispiel nach Art einer Labyrinthdichtung aufgebaut. Sie umfasst auf dem äusseren Umfang der Rotorwelle 11 eine Mehrzahl von in axialer Richtung hintereinander angeordneten, umlaufenden Ringnuten 14, in die von der Innenwand des Stators 12 radial abstehende Dichtungselemente 15 dichtend eintauchen. Die Dichtungselemente 15 können beispielsweise Dichtungsstreifen oder Bürstendichtungen sein. Die Ringnuten 15 schwächen grundsätzlich die mechanische Festigkeit der Rotorwelle 11. Um zusätzliche Spannungen aufgrund der Querschnittsgeometrie der Ringnuten 15 zu vermeiden, weist der Nutboden 17 der Ringnuten 15 eine elliptische Querschnittskontur auf, d.h. die Querschnittskontur ist Teil einer Ellipse 24, die in Fig. 1 gestrichelt eingezeichnet ist. Die grosse Hauptachse der Ellipse 24 ist dabei in axialer Richtung orientiert, die kleine Hauptachse in radialer Richtung. Dies hat zur Folge, das die Krümmung der Bodenkontur des Nutbodens 17 in der Mitte des Nutbodens 17 (unterhalb des Dichtungselements 15) ein Minimum aufweist und zu den Rändern der Ringnut hin nach Massgabe der Ellipsengleichung zunimmt. Bei der Herstellung der Ringnuten 14 wird dieser Konturverlauf entsprechend der Ellipsengleichung aus der Rotorwelle 11 herausgearbeitet.In Fig. 1 a longitudinal section through a rotating machine with a shaft seal according to an embodiment of the invention is shown in a section. The rotating machine 10, for example a compressor or a turbine, comprises a rotor shaft 11 rotatable about an axis 20, which is concentrically enclosed by a stator 12 at a distance. Between the rotor shaft 11 and the stator 12 remains due to the distance, a gap which is sealed in the axial direction by means of a shaft seal 16 against the passage of a fluid. The shaft seal 16 is constructed in the manner of a labyrinth seal in this example. It comprises on the outer circumference of the rotor shaft 11 a plurality of in the axial direction one behind the other, circumferential annular grooves 14, in the radially projecting from the inner wall of the stator 12 sealing elements 15 immerse sealing. The sealing elements 15 may be, for example, weather strips or brush seals. The annular grooves 15 basically weaken the mechanical strength of the rotor shaft 11. In order to avoid additional stresses due to the cross-sectional geometry of the annular grooves 15, the groove bottom 17 of the annular grooves 15 an elliptical cross-sectional contour, ie, the cross-sectional contour is part of an ellipse 24, which is shown in dashed lines in Fig. 1. The major axis of the ellipse 24 is oriented in the axial direction, the small major axis in the radial direction. This has the consequence that the curvature of the bottom contour of the groove bottom 17 in the middle of the groove bottom 17 (below the sealing member 15) has a minimum and increases toward the edges of the annular groove in accordance with the elliptical equation. In the production of the annular grooves 14, this contour profile is machined out of the rotor shaft 11 in accordance with the ellipse equation.

Ein anderes Ausführungsbeispiel der Erfindung ist in Fig. 2 wiedergegeben und bezieht sich direkt auf eine Turbine oder einen Verdichter. Auch hier umfasst die rotierende Maschine 18 eine Rotorwelle 19, die in diesem Fall zur Befestigung von Laufschaufeln ausgebildet ist. Dazu sind auf dem Umfang der Rotorwelle 19 axialer Richtung hintereinander mehrere tiefe, umlaufende Ringnuten 21 angeordnet, die zur Aufnahme der Füsse der Laufschaufeln vorgesehen sind, wie dies beispielsweise in der eingangs genannten Druckschrift US-A-4,818,182 gezeigt ist. Jede der Ringnuten 21 ist in einer vorgegebenen Tiefe mit beidseitigen Hinterschneidungen 22 ausgestattet, an denen sich die Schaufelfüsse entgegen den Fliehkräften abstützen können und zurückgehalten werden. Unterhalb der Hinterschneidungen 22 verlaufen die Seitenwände der Ringnuten 21 ein kurzes Stück vertikal und gehen dann in einen Nutboden 23 über, dessen Querschnittskontur ebenfalls Teil einer mit der grossen Hauptachse in axialer Richtung liegenden Ellipse 24 ist.Another embodiment of the invention is shown in Fig. 2 and relates directly to a turbine or a compressor. Again, the rotating machine 18 includes a rotor shaft 19, which is formed in this case for mounting of rotor blades. For this purpose, a plurality of deep, circumferential annular grooves 21 are arranged on the circumference of the rotor shaft 19 in the axial direction one behind the other, which are provided for receiving the feet of the blades, as shown for example in the aforementioned document US-A-4,818,182. Each of the annular grooves 21 is provided at a predetermined depth with double-sided undercuts 22 on which the blade roots can be supported against the centrifugal forces and retained. Below the undercuts 22, the side walls of the annular grooves 21 extend a short distance vertically and then pass into a groove bottom 23 whose cross-sectional contour is also part of an ellipse 24 lying in the axial direction with the large main axis.

Das Vorsehen einer elliptischen Bodenkontur ist jedoch nicht nur auf eine Umfangsnut für Laufschaufeln beschränkt, wie sie in Fig. 2 dargestellt ist. Sie kann auch bei axialen Laufschaufelnuten vom Tannenbaumtyp eingesetzt werden, um die mechanischen Spannungen im Nutgrund zu verringern.However, the provision of an elliptical bottom contour is not limited only to a circumferential groove for blades, as shown in Fig. 2. It can also be used with Tannenbaum type axial blade grooves to reduce the stresses in the groove bottom.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

10,1810.18
rotierende Maschinerotating machine
11,1911.19
Rotorwellerotor shaft
1212
Statorstator
1313
Zwischenraumgap
14,2114,21
Ringnut (umlaufend)Ring groove (circulating)
1515
Dichtungselement (Lamelle, Bürste etc.)Sealing element (lamella, brush etc.)
1616
Wellendichtungshaft seal
17,2317.23
Nutboden (elliptisch)Groove bottom (elliptical)
2020
Achseaxis
2222
Hinterschneidungundercut
2424
Ellipseellipse

Claims (7)

Rotierende Maschine (10, 18), insbesondere Verdichter oder Turbine, welche eine um eine Achse (20) drehbare Rotorwelle (11, 19) aufweist, die mit wenigstens einer Nut (14, 21) versehen ist, dadurch gekennzeichnet, dass die wenigstens eine Nut (14, 21) einen Nutboden (17, 23) mit einer elliptischen Querschnittskontur (24) aufweist.Rotating machine (10, 18), in particular compressor or turbine, which has a rotor shaft (11, 19) rotatable about an axis (20) and provided with at least one groove (14, 21), characterized in that the at least one Groove (14, 21) has a groove bottom (17, 23) with an elliptical cross-sectional contour (24). Rotierende Maschine nach Anspruch 1, dadurch gekennzeichnet, dass die wenigstens eine Nut eine konzentrisch umlaufenden Ringnut (14, 21) ist.Rotary machine according to claim 1, characterized in that the at least one groove is a concentrically encircling annular groove (14, 21). Rotierende Maschine nach Anspruch 2, dadurch gekennzeichnet, dass die grosse Hauptachse der Ellipse (24) in axialer Richtung und die kleine Hauptachse in radialer Richtung verlaufen.Rotary machine according to claim 2, characterized in that the major axis of the ellipse (24) extend in the axial direction and the small main axis in the radial direction. Rotierende Maschine nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Rotorwelle (11) mit Abstand von einem Stator (12) konzentrisch umgeben ist, dass die wenigstens eine umlaufende Ringnut (14) Teil einer zwischen Stator (12) und Rotorwelle (11) angeordneten Wellendichtung (16) ist, und dass jeder umlaufenden Ringnut (14) wenigstens ein Dichtungselement (15) zugeordnet ist, welches am Stator (12) befestigt ist und in die zugehörige umlaufende Ringnut (14) im Sinne einer Labyrinthdichtung dichtend eingreift.Rotating machine according to claim 2 or 3, characterized in that the rotor shaft (11) is surrounded concentrically with distance from a stator (12), that the at least one circumferential annular groove (14) is part of a between the stator (12) and the rotor shaft (11). arranged shaft seal (16), and in that each circumferential annular groove (14) is associated with at least one sealing element (15) which is fixed to the stator (12) and sealingly engages in the associated circumferential annular groove (14) in the sense of a labyrinth seal. Rotierende Maschine nach Anspruch 4, dadurch gekennzeichnet, dass die Dichtungselemente (15) als Streifendichtungen oder Bürstendichtungen ausgebildet sind.Rotary machine according to claim 4, characterized in that the sealing elements (15) are designed as strip seals or brush seals. Rotierende Maschine nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die rotierende Maschine (18) ein Verdichter oder eine Turbine ist, dass die Rotorwelle (19) zur Aufnahme von Laufschaufeln vorgesehen ist, und dass die wenigstens eine umlaufende Ringnut (21) zur Aufnahme und Halterung der Füsse der Laufschaufeln ausgebildet ist.Rotary machine according to claim 2 or 3, characterized in that the rotating machine (18) is a compressor or a turbine, that the rotor shaft (19) is provided for receiving rotor blades, and that the at least one circumferential annular groove (21) for receiving and holding the feet of the blades is formed. Rotierende Maschinen nach Anspruch 6, dadurch gekennzeichnet, dass in der wenigstens einen umlaufenden Ringnut (21) oberhalb des Nutbodens (23) Hinterschneidungen (22) zum Zurückhalten des Schaufelfusses angeordnet sind.Rotary machines according to claim 6, characterized in that in the at least one circumferential annular groove (21) above the groove bottom (23) undercuts (22) are arranged for retaining the blade root.
EP06110074A 2005-03-03 2006-02-17 Rotating machine Ceased EP1703080A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3702005 2005-03-03

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US (1) US7628581B2 (en)
EP (1) EP1703080A1 (en)

Cited By (7)

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CH702204A1 (en) * 2009-11-10 2011-05-13 Alstom Technology Ltd Rotor for axial flow turbomachine i.e. gas turbine, in combined cycle power plant, has rotating blades inserted into groove, and blade root comprising inverted-T root with hammer head and adapted to base area of groove in radial direction
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WO2012004761A3 (en) * 2010-07-09 2012-11-22 Brusa Elektronik Ag Laminated rotor for rotating electric machine
CN103850715A (en) * 2012-11-30 2014-06-11 西门子公司 Rotor wheel disc
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Cited By (8)

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US8198776B2 (en) 2007-08-28 2012-06-12 Brusa Elektronik Ag Current-energized synchronous motor, particularly for vehicle drives
DE102009003344B4 (en) * 2008-01-14 2020-03-26 General Electric Company Method for repairing a rotor disk for a gas turbine and corresponding rotor disk for a gas turbine
EP2320030A1 (en) 2009-11-10 2011-05-11 Alstom Technology Ltd Rotor and rotor blade for an axial turbomachine
CH702203A1 (en) * 2009-11-10 2011-05-13 Alstom Technology Ltd Rotor for axial flow turbomachine i.e. gas turbine, in combined cycle power plant, has rotating blades inserted into groove, and blade root comprising inverted-T root with hammer head and adapted to base area of groove in radial direction
CH702204A1 (en) * 2009-11-10 2011-05-13 Alstom Technology Ltd Rotor for axial flow turbomachine i.e. gas turbine, in combined cycle power plant, has rotating blades inserted into groove, and blade root comprising inverted-T root with hammer head and adapted to base area of groove in radial direction
US8770938B2 (en) 2009-11-10 2014-07-08 Alstom Technology Ltd Rotor for an axial-throughflow turbomachine and moving blade for such a rotor
WO2012004761A3 (en) * 2010-07-09 2012-11-22 Brusa Elektronik Ag Laminated rotor for rotating electric machine
CN103850715A (en) * 2012-11-30 2014-06-11 西门子公司 Rotor wheel disc

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