EP2478187A1 - Blade fastening having safety device for turbine blades - Google Patents

Blade fastening having safety device for turbine blades

Info

Publication number
EP2478187A1
EP2478187A1 EP10755152A EP10755152A EP2478187A1 EP 2478187 A1 EP2478187 A1 EP 2478187A1 EP 10755152 A EP10755152 A EP 10755152A EP 10755152 A EP10755152 A EP 10755152A EP 2478187 A1 EP2478187 A1 EP 2478187A1
Authority
EP
European Patent Office
Prior art keywords
rotor
turbine blade
groove
securing
clamping piece
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.)
Granted
Application number
EP10755152A
Other languages
German (de)
French (fr)
Other versions
EP2478187B1 (en
Inventor
Thomas Helmis
Heinrich STÜER
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
Priority to EP10755152.5A priority Critical patent/EP2478187B1/en
Publication of EP2478187A1 publication Critical patent/EP2478187A1/en
Application granted granted Critical
Publication of EP2478187B1 publication Critical patent/EP2478187B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01D5/32—Locking, e.g. by final locking blades or keys
    • F01D5/323—Locking of axial insertion type blades by means of a key or the like parallel to the axis of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/301—Retaining bolts or nuts
    • F05B2260/3011—Retaining bolts or nuts of the frangible or shear type
    • 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
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position

Definitions

  • the invention relates to a rotor, comprising at least one turbine blade and a securing device for axial and radial securing of the turbine blade, wherein the rotor comprises a blade groove and the turbine blade comprises a turbine blade root, wherein the blade groove and the turbine blade root are formed such that the turbine show - Base is adjusted in the blade groove.
  • Blade fasteners are typically used to fasten rotor blades to a rotor of a turbomachine, particularly a steam turbine. Due to the relatively rapid rotation of the rotor on the rotor is arranged ⁇ rotor blades are subjected to high centrifugal forces. The turbine blade root of the turbine blades must therefore withstand high forces and is urged radially outward in the blade groove. In addition to the centrifugal forces, strong vibration loads pose a further problem that can result in mechanical damage, material fatigue, corrosion and migration of the blade root within the blade groove. For securing the turbine blade root within the scoop groove different solutions as in ⁇ game as metal wedges, spring washers or sealing pieces are known.
  • metal wedges provide locking of the associated blade root within a blade groove, both axially and radially, it is difficult for large blades to produce sufficient holding forces during rotation in the radial direction with such metal wedges.
  • Disc springs produce only radial holding forces and require additional effort for a locking in the axial direction of the associated blade groove.
  • complex measurements are required for disc springs during assembly. As sealing pieces always two parts must be provided, In addition, their assembly partly requires the processing of the parts by hand.
  • the object of the invention is to provide a blade fastening of a turbomachine in which a precise and firm support of blades, in associated blade holders, is ensured over a long period of operation.
  • This object is achieved by a rotor comprising at least ⁇ a turbine blade according to Claim. 1
  • the securing device has a clamping piece which exerts a radial force from the rotor onto the turbine blade root.
  • the clamping piece is in this case arranged in a groove located in the rotor, wherein the groove may be the same as the groove in which the shear pin is arranged.
  • the size of the clamping piece is chosen such that a force is generated which acts in the radial direction. That means the
  • Turbine blade is pressed against the support flanks of the blade groove. Up to a certain rotational frequency thus a movement of the blades in the groove is effectively prevented. From a certain rotational frequency, the centrifugal forces are so great that a movement is prevented by the concern with the support flanks. However, it is almost inevitable that the turbine blade vibrates despite monocytefestist.
  • the attachment according to the invention also prevents a relative movement between the turbine blade root and the blade groove, whereby surface damage is reduced.
  • the clamping piece has an upper leg and a lower leg, wherein the upper leg on Turbinenschaufelfu. abuts and exerts a force in the radial direction against the turbine blade root. The lower leg rests against the rotor.
  • the invention is characterized in that the upper leg and the lower leg substantially form a V-shape and by skillful material selection, a spring force is exerted, which acts from the rotor to the turbine blade root in the radial direction.
  • the invention is based on the idea that in a show felnut both a radial and axial securing can be arranged on.
  • the shear pin is arranged in a bore in the entspre ⁇ sponding turbine blade and is advantageously of at an edge on the rotor. In this way, an axial movement of the turbine blade root is not possible.
  • a shear pin is arranged both on the leading edge and on the trailing edge of the turbine blade root, an axial displacement of the turbine blade root is effectively prevented in one direction as well as in the other direction.
  • the shear pin is in this case installed in a groove arranged in the rotor.
  • the installation of the shear pin takes place after the turbine blade has been installed in the rotor in the corresponding blade ⁇ groove.
  • a securing element is used, which is designed to secure the clamping ⁇ piece.
  • the clamping piece is used as formed sheet metal and arranged between the clamping piece and the rotor.
  • Figure 1 is a side view of a rotor with a turbine blade ⁇ in the installed state
  • Figure 2 is a cross-sectional view of a portion of a rotor with built-in turbine blade
  • Figure 3 is an enlarged view of a detail of
  • Figure 4 is an enlarged view of a clamping piece
  • Figure 5 is a perspective view of the clamping piece
  • Figure 6 is a perspective view of a Scherstif ⁇ tes
  • Figure 7 is a perspective view of a fuse ⁇ element.
  • FIG. 1 shows a side view of a part of a rotor 1 with a built-in turbine blade 2.
  • the turbine blade 2 has a turbine blade root 3, which is adapted to a corresponding blade groove 4.
  • the turbine acting ⁇ fel 2 is Scheme- in the axial direction 5 into the blade groove 4 postponed.
  • the blade groove 4 is formed as Tannenbaumschaufelnut from ⁇ and includes a plurality of support flanks. 6
  • the turbine blade 2 is secured in the blade groove 4 both in the axial direction 5 and in the radial direction 29.
  • the radial direction 29 substantially corresponds to the longitudinal orientation of the turbine blade 2 and the axial Rich ⁇ tion 5 corresponds substantially to the axis of rotation, which is not shown in detail in Figure 1.
  • a securing means 7, which is attached ⁇ arranged below the turbine blade root 3 can be realized.
  • the turbine blade root 3 is designed in such a way that it fits into the blade groove 4, ie, it can be displaced substantially in the axial direction 5.
  • the securing device 7 essentially comprises three components. This would be on the one hand
  • the securing device 7 is arranged in a corresponding groove 11 in the rotor 1. This groove 11 is formed both on the steam inlet side 12 and on the steam outlet side 13.
  • the incorporation of at least two Sich ceremoniesseinrichtun ⁇ s 7, that is, both the steam inlet side 12 and on the steam outlet side 13, offers the advantage that the door ⁇ binenschaufel 2 can no longer be displaced in the axial direction. 5
  • the shear pin 8 is cylindrical and has a length L which is less than the groove height 14 of the groove 11. This allows easy insertion of the shear pin 8 in the groove 11 is possible.
  • the shear pin 8 is placed in a bore 15 which is located in the blade root 3.
  • the Boh ⁇ fuse 15 and the groove 11 are designed such that when installed, the shear pin 8 rests against an edge 16 in the rotor 1. A displacement of the turbine blade root 3 in the axial direction 5 is thus no longer possible.
  • Another element of the securing device 7 forms the clamping piece 9.
  • Figures 4 and 5 is a perspective and enlarged view of the clamping piece 9 can be seen.
  • the clamping piece 9 with a base body 17 which is cuboid-shaped and an upper leg 18 and a lower leg 19 executed. Between the upper leg 18 and the lower leg 19, a gap 20 is ge ⁇ forms.
  • the dimensions of the clamping piece 9 is such ge ⁇ selected, that the height 21 of the clamping piece 9 is less than the groove height A 14. inserting the clamping piece 9 in the blade groove 4 is therefore easily possible.
  • the dimensions are further selected such that in the installed state, the upper leg 18, a force which a spring force äh ⁇ nelt, presses against the turbine blade root 3.
  • Leg 18 has for this purpose a projection 22 which is approximately one third of the length of the clamping piece 9. Both the upper leg 18 and the lower leg 19 are formed wedge ⁇ shaped, ie from the base body 17 in the direction
  • the securing element 10 is formed as an elongated sheet metal piece which is folded once at its tip 23 once, whereby a projection 28 is formed. When installed, this projection 28 abuts in a corresponding securing groove 24. As shown in Figure 3, thereby an axial displacement 5 of the securing element 10 is effectively avoided. Furthermore, the securing element 10 has an end piece 26 which relative to a main piece 25 is bent perpendicular to the bending point 27.
  • the securing means 7 will now buildsnow- follows: first, the turbine blade 2 is inserted in the blade groove entspre ⁇ sponding. 4 Subsequently, the shear pin 8 is adjusted in the corresponding hole 15. The securing element 10 is inserted in the unbent state and has at the tip 23 a projection 28 which is arranged in a corresponding securing groove 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The invention relates to a safety device (7) for a turbine blade (2), wherein the safety device (7) comprises a shear pin (8), a clamping piece (9) and a securing element (10), wherein the shear pin (8) is arranged in a corresponding bore (15) in the turbine blade foot (3) and the clamping piece (9) is designed having an upper limb (18) and a lower limb (19), wherein the clamping piece (9) exerts a radial force on the turbine blade foot (3) for radial safeguarding.

Description

Beschreibung description
SCHAUFELBEFESTIGUNG MIT SICHERHEITSEINRICHTUNG FÜR TURBINENSCHAUFELN BUCKET MOUNTING WITH SAFETY DEVICE FOR TURBINE BUCKETS
Die Erfindung betrifft einen Rotor, umfassend zumindest eine Turbinenschaufel und eine Sicherungseinrichtung zur axialen und radialen Sicherung der Turbinenschaufel, wobei der Rotor eine Schaufelnut und die Turbinenschaufel einen Turbinen- schaufelfuß umfasst, wobei die Schaufelnut und der Turbinen- schaufelfuß derart ausgebildet sind, dass der Turbinenschau- felfuß in der Schaufelnut angepasst ist. The invention relates to a rotor, comprising at least one turbine blade and a securing device for axial and radial securing of the turbine blade, wherein the rotor comprises a blade groove and the turbine blade comprises a turbine blade root, wherein the blade groove and the turbine blade root are formed such that the turbine show - Base is adjusted in the blade groove.
Schaufelbefestigungen werden in der Regel zum Befestigen von Laufschaufein an einem Rotor einer Strömungsmaschine, insbesondere Dampfturbine verwendet. Durch die vergleichsweise schnelle Rotation des Rotors werden die auf dem Rotor ange¬ ordneten Laufschaufein hohen Fliehkräften ausgesetzt. Der Turbinenschaufelfuß der Turbinenschaufeln muss daher hohen Kräften standhalten und wird in der Schaufelnut radial nach außen gedrängt. Neben den Fliehkräften stellen starke Schwingungsbelastungen ein weiteres Problem dar, die mechanische Beschädigungen, Materialermüdungen, Korrosion und eine Wanderbewegung des Schaufelfußes innerhalb der Schaufelnut zur Folge haben können. Zum Festlegen des Turbinenschaufelfußes innerhalb der Schaufelnut sind verschieden Lösungen wie bei¬ spielsweise Metallkeile, Federringe oder Abdichtungsstücke bekannt. Metallkeile stellen zwar axial als auch radial eine Arretierung des zugehörigen Schaufelfußes innerhalb einer Schaufelnut her, aber bei großen Laufschaufein ist es mit solchen Metallkeilen schwierig, ausreichende Haltekräfte während der Rotation in radialer Richtung zu erzeugen. Tellerfedern erzeugen lediglich radiale Halterkräfte und erfordern zusätzlichen Aufwand für eine Arretierung in axialer Richtung der zugehörigen Schaufelnut. Ferner sind für Tellerfedern während der Montage aufwändige Messungen erforderlich. Als Abdichtungsstücke müssen immer zwei Teile vorgesehen sein, deren Montage darüber hinaus teilweise die Bearbeitung der Teile von Hand bedarf. Blade fasteners are typically used to fasten rotor blades to a rotor of a turbomachine, particularly a steam turbine. Due to the relatively rapid rotation of the rotor on the rotor is arranged ¬ rotor blades are subjected to high centrifugal forces. The turbine blade root of the turbine blades must therefore withstand high forces and is urged radially outward in the blade groove. In addition to the centrifugal forces, strong vibration loads pose a further problem that can result in mechanical damage, material fatigue, corrosion and migration of the blade root within the blade groove. For securing the turbine blade root within the scoop groove different solutions as in ¬ game as metal wedges, spring washers or sealing pieces are known. Although metal wedges provide locking of the associated blade root within a blade groove, both axially and radially, it is difficult for large blades to produce sufficient holding forces during rotation in the radial direction with such metal wedges. Disc springs produce only radial holding forces and require additional effort for a locking in the axial direction of the associated blade groove. Furthermore, complex measurements are required for disc springs during assembly. As sealing pieces always two parts must be provided, In addition, their assembly partly requires the processing of the parts by hand.
Der Erfindung liegt die Aufgabe zugrunde, eine Schaufelbefes- tigung einer Strömungsmaschine bereitzustellen, bei der über einen langen Betriebszeitraum hinweg eine präzise und feste Halterung von Schaufeln, in zugehörigen Schaufelhaltern, sichergestellt ist. Diese Aufgabe wird gelöst durch einen Rotor, umfassend zumin¬ dest eine Turbinenschaufel gemäß Anspruch 1. The object of the invention is to provide a blade fastening of a turbomachine in which a precise and firm support of blades, in associated blade holders, is ensured over a long period of operation. This object is achieved by a rotor comprising at least ¬ a turbine blade according to Claim. 1
Die Sicherungseinrichtung weist ein Klemmstück auf, das eine radiale Kraft vom Rotor auf den Turbinenschaufelfuß ausübt. Das Klemmstück wird hierbei in einer im Rotor befindlichen Nut angeordnet, wobei die Nut dieselbe sein kann, wie die Nut, in der der Scherstift angeordnet ist. Die Größe des Klemmstücks ist derart gewählt, dass eine Kraft entsteht, die in radialer Richtung wirkt. Das bedeutet, dass die The securing device has a clamping piece which exerts a radial force from the rotor onto the turbine blade root. The clamping piece is in this case arranged in a groove located in the rotor, wherein the groove may be the same as the groove in which the shear pin is arranged. The size of the clamping piece is chosen such that a force is generated which acts in the radial direction. That means the
Turbinenschaufel gegen die Tragflanken der Schaufelnut gedrückt wird. Bis zu einer gewissen Rotationsfrequenz wird somit eine Bewegung der Schaufeln in der Nut wirksam verhindert. Ab einer gewissen Rotationsfrequenz sind die Fliehkräfte derart groß, dass eine Bewegung durch das Anliegen an den Tragflanken verhindert ist. Allerdings ist es nahezu unvermeidbar, dass die Turbinenschaufel trotz Fußbefestigung schwingt. Die erfindungsgemäße Befestigung verhindert zudem eine Relativbewegung zwischen dem Turbinenschaufelfuß und der Schaufelnut, wodurch Oberflächenschädigungen vermindert werden. Turbine blade is pressed against the support flanks of the blade groove. Up to a certain rotational frequency thus a movement of the blades in the groove is effectively prevented. From a certain rotational frequency, the centrifugal forces are so great that a movement is prevented by the concern with the support flanks. However, it is almost inevitable that the turbine blade vibrates despite Fußbefestigung. The attachment according to the invention also prevents a relative movement between the turbine blade root and the blade groove, whereby surface damage is reduced.
Bis zu dieser Rotationsfrequenz ist ein axiales Verschieben der Turbinenschaufel möglich. Oberhalb der gewissen Rotati¬ onsfrequenz sind die Fliehkräfte derart hoch, dass ein axia- les Verschieben vermieden ist, da die Reibkräfte, die inUp to this rotational frequency, an axial displacement of the turbine blade is possible. Above the certain Rotati ¬ onsfrequenz the centrifugal forces are so high that a axia- les shifting is avoided, since the frictional forces in
Folge der Fliehkraft wirken, ein Verschieben der Turbinenschaufel in der Schaufelnut wirksam verhindern. Das Klemmstück weist einen oberen Schenkel und einen unteren Schenkel auf, wobei der obere Schenkel am Turbinenschaufelfu. anliegt und gegen den Turbinenschaufelfuß eine Kraft in radialer Richtung ausübt. Der untere Schenkel liegt am Rotor an . Consequence of centrifugal force, effectively prevent displacement of the turbine blade in the blade groove. The clamping piece has an upper leg and a lower leg, wherein the upper leg on Turbinenschaufelfu. abuts and exerts a force in the radial direction against the turbine blade root. The lower leg rests against the rotor.
Die Erfindung zeichnet sich dadurch aus, dass der obere Schenkel und der untere Schenkel im Wesentlichen eine V-Form bilden und durch geschickte Materialauswahl eine Federkraft ausgeübt wird, die vom Rotor auf den Turbinenschaufelfuß in radialer Richtung wirkt. The invention is characterized in that the upper leg and the lower leg substantially form a V-shape and by skillful material selection, a spring force is exerted, which acts from the rotor to the turbine blade root in the radial direction.
In einer vorteilhaften Weiterbildung liegt der Scherstift au dem unteren Schenkel auf. In an advantageous development of the shear pin on the lower leg.
Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben . Advantageous developments are specified in the subclaims.
Die Erfindung geht von dem Gedanken aus, dass in einer Schau felnut sowohl eine radiale als auch eine axiale Sicherung an geordnet werden kann. Der Scherstift wird in eine entspre¬ chende Bohrung im Turbinenschaufelfuß angeordnet und liegt vorteilhafterweise an einer Kante am Rotor an. Dadurch ist eine axiale Bewegung des Turbinenschaufelfußes nicht möglich Werden sowohl an der Vorderkante als auch an der Hinterkante des Turbinenschaufelfußes jeweils ein Scherstift angeordnet, so ist eine axiale Verschiebung des Turbinenschaufelfußes so wohl in die eine Richtung als auch in die andere Richtung wirksam verhindert. The invention is based on the idea that in a show felnut both a radial and axial securing can be arranged on. The shear pin is arranged in a bore in the entspre ¬ sponding turbine blade and is advantageously of at an edge on the rotor. In this way, an axial movement of the turbine blade root is not possible. In each case a shear pin is arranged both on the leading edge and on the trailing edge of the turbine blade root, an axial displacement of the turbine blade root is effectively prevented in one direction as well as in the other direction.
Der Scherstift wird hierbei in eine im Rotor angeordnete Nut eingebaut. Der Einbau des Scherstiftes erfolgt, nachdem die Turbinenschaufel in den Rotor in die entsprechende Schaufel¬ nut eingebaut wurde. The shear pin is in this case installed in a groove arranged in the rotor. The installation of the shear pin takes place after the turbine blade has been installed in the rotor in the corresponding blade ¬ groove.
Um ein ungewolltes Lösen des Klemmstückes zu vermeiden, wird ein Sicherungselement verwendet, das zum Sichern des Klemm¬ stückes ausgebildet ist. Dazu wird das Klemmstück als Siehe- rungsblech ausgebildet und zwischen dem Klemmstück und dem Rotor angeordnet. Durch Umbiegen des Sicherungsbleches an der Kante des Klemmstückes wird ein Verschieben des Klemmstückes vermieden, wobei gleichzeitig das Sicherungsblech in eine entsprechende Nut im Rotor angeordnet werden muss. To avoid accidental release of the clamping piece, a securing element is used, which is designed to secure the clamping ¬ piece. For this purpose, the clamping piece is used as formed sheet metal and arranged between the clamping piece and the rotor. By bending the locking plate at the edge of the clamping piece a displacement of the clamping piece is avoided, at the same time the locking plate must be arranged in a corresponding groove in the rotor.
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemä¬ ßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. An exemplary embodiment of the invention shown SEN solution is explained in more detail with reference to the accompanying diagrammatic drawings.
Es zeigen: Show it:
Figur 1 eine Seitenansicht eines Rotors mit einer Turbinen¬ schaufel im eingebauten Zustand; Figure 1 is a side view of a rotor with a turbine blade ¬ in the installed state;
Figur 2 eine Querschnittsansicht eines Teils eines Rotors mit eingebauter Turbinenschaufel; Figure 2 is a cross-sectional view of a portion of a rotor with built-in turbine blade;
Figur 3 eine vergrößerte Darstellung eines Ausschnitts aus Figure 3 is an enlarged view of a detail of
Figur 2;  Figure 2;
Figur 4 eine vergrößerte Darstellung eines Klemmstückes; Figure 4 is an enlarged view of a clamping piece;
Figur 5 eine perspektivische Darstellung des Klemmstückes; Figure 5 is a perspective view of the clamping piece;
Figur 6 eine perspektivische Darstellung eines Scherstif¬ tes; Figure 6 is a perspective view of a Scherstif ¬ tes;
Figur 7 eine perspektivische Darstellung eines Sicherungs¬ elementes . Figure 7 is a perspective view of a fuse ¬ element.
Die Figur 1 zeigt eine Seitenansicht eines Teils eines Rotors 1 mit einer eingebauten Turbinenschaufel 2. Die Turbinen- schaufei 2 weist einen Turbinenschaufelfuß 3 auf, der in eine entsprechende Schaufelnut 4 angepasst ist. Die Turbinenschau¬ fel 2 wird in axialer Richtung 5 in die Schaufelnut 4 einge- schoben. Die Schaufelnut 4 ist als Tannenbaumschaufelnut aus¬ gebildet und umfasst mehrere Tragflanken 6. FIG. 1 shows a side view of a part of a rotor 1 with a built-in turbine blade 2. The turbine blade 2 has a turbine blade root 3, which is adapted to a corresponding blade groove 4. The turbine acting ¬ fel 2 is einge- in the axial direction 5 into the blade groove 4 postponed. The blade groove 4 is formed as Tannenbaumschaufelnut from ¬ and includes a plurality of support flanks. 6
Die Turbinenschaufel 2 wird in der Schaufelnut 4 sowohl in axialer Richtung 5 als auch in radialer Richtung 29 gesichert. Die radiale Richtung 29 entspricht im Wesentlichen der Längsausrichtung der Turbinenschaufel 2 und die axiale Rich¬ tung 5 entspricht im Wesentlichen der Rotationsachse, die in der Figur 1 nicht näher dargestellt ist. The turbine blade 2 is secured in the blade groove 4 both in the axial direction 5 and in the radial direction 29. The radial direction 29 substantially corresponds to the longitudinal orientation of the turbine blade 2 and the axial Rich ¬ tion 5 corresponds substantially to the axis of rotation, which is not shown in detail in Figure 1.
Zur Sicherung der Turbinenschaufel 2 wird eine Sicherungseinrichtung 7, die unterhalb des Turbinenschaufelfußes 3 ange¬ ordnet ist, realisiert. Der Turbinenschaufelfuß 3 ist hierbei derart ausgebildet, dass dieser in die Schaufelnut 4 ange- passt ist, d. h. in axialer Richtung 5 sich im Wesentlichen verschieben lässt. To secure the turbine blade 2 is a securing means 7, which is attached ¬ arranged below the turbine blade root 3 can be realized. In this case, the turbine blade root 3 is designed in such a way that it fits into the blade groove 4, ie, it can be displaced substantially in the axial direction 5.
In der Figur 2 ist eine Schnittdarstellung durch einen Teil des Rotors 1 dargestellt. Die Sicherungseinrichtung 7 umfasst im Wesentlichen drei Bauteile. Dies wären zum einen ein 2 shows a sectional view through a part of the rotor 1 is shown. The securing device 7 essentially comprises three components. This would be on the one hand
Scherstift 8, ein Klemmstück 9 und ein Sicherungselement 10. Die Sicherungseinrichtung 7 ist in eine entsprechende Nut 11 im Rotor 1 angeordnet. Diese Nut 11 ist sowohl an der Dampfeintrittsseite 12 als auch an der Dampfaustrittsseite 13 aus- gebildet. Der Einbau von zumindest zwei Sicherungseinrichtun¬ gen 7, d. h. sowohl an der Dampfeintrittsseite 12 als auch an der Dampfaustrittsseite 13, bietet den Vorteil, dass die Tur¬ binenschaufel 2 sich in axialer Richtung 5 nicht mehr verschieben lässt. Die Funktionsweise sowie der Einbau der Shear pin 8, a clamping piece 9 and a securing element 10. The securing device 7 is arranged in a corresponding groove 11 in the rotor 1. This groove 11 is formed both on the steam inlet side 12 and on the steam outlet side 13. The incorporation of at least two Sicherungseinrichtun ¬ s 7, that is, both the steam inlet side 12 and on the steam outlet side 13, offers the advantage that the door ¬ binenschaufel 2 can no longer be displaced in the axial direction. 5 The functioning as well as the installation of the
Sicherungseinrichtung 7 werden anhand der Figur 3 näher erläutert . Safety device 7 will be explained in more detail with reference to FIG 3.
Der Scherstift 8 ist zylindrisch ausgebildet und weist eine Länge L auf, die geringer ist als die Nuthöhe 14 der Nut 11. Dadurch ist ein problemloses Einschieben des Scherstiftes 8 in die Nut 11 möglich. Der Scherstift 8 wird in eine Bohrung 15, die sich im Schaufelfuß 3 befindet, eingebracht. Die Boh¬ rung 15 und die Nut 11 werden dabei derart ausgebildet, dass im eingebauten Zustand der Scherstift 8 an einer Kante 16 im Rotor 1 anliegt. Ein Verschieben des Turbinenschaufelfußes 3 in axialer Richtung 5 ist somit nicht mehr möglich. Ein weiteres Element der Sicherungseinrichtung 7 bildet das Klemmstück 9. In den Figuren 4 und 5 ist eine perspektivische und vergrößerte Darstellung des Klemmstückes 9 zu sehen. Im Wesentlichen ist das Klemmstück 9 mit einem Grundkörper 17, der quaderförmig ausgebildet ist und einem oberen Schenkel 18 und einem unteren Schenkel 19 ausgeführt. Zwischen dem oberen Schenkel 18 und dem unteren Schenkel 19 ist ein Spalt 20 ge¬ bildet. Die Abmessungen des Klemmstückes 9 sind derart ge¬ wählt, dass die Höhe 21 des Klemmstückes 9 geringer ist als die Nuthöhe 14. Ein Einschieben des Klemmstückes 9 in die Schaufelnut 4 ist daher problemlos möglich. Die Abmessungen sind weiterhin derart gewählt, dass im eingebauten Zustand der obere Schenkel 18 eine Kraft, die einer Federkraft äh¬ nelt, gegen den Turbinenschaufelfuß 3 drückt. Der obere The shear pin 8 is cylindrical and has a length L which is less than the groove height 14 of the groove 11. This allows easy insertion of the shear pin 8 in the groove 11 is possible. The shear pin 8 is placed in a bore 15 which is located in the blade root 3. The Boh ¬ fuse 15 and the groove 11 are designed such that when installed, the shear pin 8 rests against an edge 16 in the rotor 1. A displacement of the turbine blade root 3 in the axial direction 5 is thus no longer possible. Another element of the securing device 7 forms the clamping piece 9. In Figures 4 and 5 is a perspective and enlarged view of the clamping piece 9 can be seen. In essence, the clamping piece 9 with a base body 17 which is cuboid-shaped and an upper leg 18 and a lower leg 19 executed. Between the upper leg 18 and the lower leg 19, a gap 20 is ge ¬ forms. The dimensions of the clamping piece 9 is such ge ¬ selected, that the height 21 of the clamping piece 9 is less than the groove height A 14. inserting the clamping piece 9 in the blade groove 4 is therefore easily possible. The dimensions are further selected such that in the installed state, the upper leg 18, a force which a spring force äh ¬ nelt, presses against the turbine blade root 3. The upper
Schenkel 18 weist hierfür einen Vorsprung 22 auf, der ca. ein Drittel der Länge des Klemmstückes 9 beträgt. Sowohl der obere Schenkel 18 als auch der untere Schenkel 19 sind keil¬ förmig ausgeführt, d. h. vom Grundkörper 17 in Richtung Leg 18 has for this purpose a projection 22 which is approximately one third of the length of the clamping piece 9. Both the upper leg 18 and the lower leg 19 are formed wedge ¬ shaped, ie from the base body 17 in the direction
Schenkel 18, 19 verjüngen sich der obere Schenkel 18 und der untere Schenkel 19. Legs 18, 19, the upper leg 18 and the lower leg 19 taper.
Die Figur 6 zeigt eine perspektivische Darstellung des Scher¬ stiftes 8. Ein drittes Element der Sicherungseinrichtung 7 ist das Sicherungselement 10, das als Sicherungsblech ausge¬ führt wird. Das Sicherungselement 10 wird anhand der Figur 7 näher erläutert. Im Wesentlichen ist das Sicherungselement 10 als länglich ausgebildetes Blechstück ausgebildet, das an seiner Spitze 23 einmal vollständig gefaltet ist, wodurch ein Vorsprung 28 entsteht. Im eingebauten Zustand liegt dieser Vorsprung 28 in einer entsprechenden Sicherungsnut 24 an. Wie in Figur 3 dargestellt, wird dadurch ein axiales Verschieben 5 des Sicherungselementes 10 wirksam vermieden. Des Weiteren weist das Sicherungselement 10 ein Endstück 26 auf, das gegenüber einem Hauptstück 25 senkrecht an der Biegungsstelle 27 gebogen ist. 6 shows a perspective view of the shear pin ¬ 8. A third element of the safety device 7 is the fuse element 10 being as a backup sheet is ¬ leads. The securing element 10 will be explained in more detail with reference to FIG. In essence, the securing element 10 is formed as an elongated sheet metal piece which is folded once at its tip 23 once, whereby a projection 28 is formed. When installed, this projection 28 abuts in a corresponding securing groove 24. As shown in Figure 3, thereby an axial displacement 5 of the securing element 10 is effectively avoided. Furthermore, the securing element 10 has an end piece 26 which relative to a main piece 25 is bent perpendicular to the bending point 27.
Die Sicherungseinrichtung 7 wird nun folgendermaßen einge- baut: zunächst wird die Turbinenschaufel 2 in die entspre¬ chende Schaufelnut 4 eingebracht. Anschließend wird der Scherstift 8 in die entsprechende Bohrung 15 angepasst. Das Sicherungselement 10 wird im ungebogenen Zustand eingeschoben und weist an der Spitze 23 einen Vorsprung 28 auf, der in eine entsprechende Sicherungsnut 24 angeordnet ist. DasThe securing means 7 will now builds einge- follows: first, the turbine blade 2 is inserted in the blade groove entspre ¬ sponding. 4 Subsequently, the shear pin 8 is adjusted in the corresponding hole 15. The securing element 10 is inserted in the unbent state and has at the tip 23 a projection 28 which is arranged in a corresponding securing groove 24. The
Klemmstück 9 wird auf das Sicherungselement 10 derart in die Nut 11 geschoben, dass der Scherstift 8 auf dem unteren Clamping piece 9 is pushed onto the securing element 10 in the groove 11 such that the shear pin 8 on the lower
Schenkel 19 anliegt. Ein Herausfallen des Scherstiftes 8 aus der Bohrung 15 wird dadurch vermieden. Das Sicherungselement 10 wird im ungebogenen Zustand eingeschoben und weist an der Spitze 23 einen Vorsprung 28 auf, der in eine entsprechende Sicherungsnut 24 angeordnet ist. Das Sicherungselement 10 wird schließlich an der Biegestelle 27 gebogen, wodurch ein Herausfallen des Klemmstückes 9 aus der Nut 11 wirksam ver- mieden ist. Leg 19 is present. Falling out of the shear pin 8 from the bore 15 is thereby avoided. The securing element 10 is inserted in the unbent state and has at the tip 23 a projection 28 which is arranged in a corresponding securing groove 24. The securing element 10 is finally bent at the bending point 27, as a result of which falling out of the clamping piece 9 from the groove 11 is effectively avoided.

Claims

Patentansprüche claims
1. Rotor (1), 1. rotor (1),
umfassend zumindest eine Turbinenschaufel (2) und eine comprising at least one turbine blade (2) and a
Sicherungseinrichtung (7) zur axialen und radialen Sicherung der Turbinenschaufel (2), Securing device (7) for axial and radial securing of the turbine blade (2),
wobei der Rotor (1) eine Schaufelnut (4) und die Turbinen¬ schaufel (2) einen Turbinenschaufelfuß (3) umfasst, wobei die Schaufelnut (4) und der Turbinenschaufelfuß (3) derart ausgebildet sind, dass der Turbinenschaufelfuß (3) in der Schaufelnut (4) angepasst ist, wherein the rotor (1) comprises a blade groove (4) and the turbine blade (2) comprises a turbine blade (3), wherein the blade groove (4) and the turbine blade (3) are designed such that the turbine blade (3) in the Paddle groove (4) is adjusted
wobei die Sicherungseinrichtung (7) einen Scherstift (8) aufweist, der in eine Bohrung (15) im Turbinenschaufelfuß (3) ragt,  the securing device (7) having a shear pin (8) projecting into a bore (15) in the turbine blade root (3),
wobei das Klemmstück (9) in einer im Rotor (1) befindlichen Nut (11) angeordnet ist,  wherein the clamping piece (9) is arranged in a groove (11) located in the rotor (1),
wobei das Klemmstück (9) einen oberen Schenkel (18) und einen unteren Schenkel (19) aufweist,  the clamping piece (9) having an upper leg (18) and a lower leg (19),
wobei der obere Schenkel (18) am Turbinenschaufelfuß (3) anliegt und gegen den Turbinenschaufelfuß (3) eine Kraft in radialer Richtung (29) ausübt,  wherein the upper leg (18) rests against the turbine blade root (3) and exerts a force in the radial direction (29) against the turbine blade root (3),
wobei der untere Schenkel (19) am Rotor (1) anliegt und gegen den Rotor (1) eine Kraft in radialer (6) Richtung ausübt,  wherein the lower leg (19) rests against the rotor (1) and exerts a force in the radial (6) direction against the rotor (1),
wobei der obere (18) und der untere (19) Schenkel V-förmig ausgebildet sind,  wherein the upper (18) and the lower (19) leg are V-shaped,
wobei der Scherstift (8) auf dem unteren Schenkel (19) an¬ liegt . wherein the shear pin (8) on the lower leg (19) is located on ¬ .
2. Rotor (1) nach Anspruch 1, 2. Rotor (1) according to claim 1,
wobei der Rotor (1) eine Kante (16) aufweist, an der der Scherstift (8) anliegt. wherein the rotor (1) has an edge (16) against which the shear pin (8) abuts.
3. Rotor (1) nach Anspruch 1 oder 2, 3. rotor (1) according to claim 1 or 2,
wobei die Sicherungseinrichtung (7) ein Klemmstück (9) aufweist, das eine radiale Kraft vom Rotor (1) auf den Turbi¬ nenschaufelfuß (3) ausübt. wherein the securing means (7) comprises a clamping piece (9) which exerts a radial force from the rotor (1) on the Turbi ¬ nenschaufelfuß (3).
4. Rotor (1) nach einem der vorhergehenden Ansprüche, 4. rotor (1) according to any one of the preceding claims,
wobei die Sicherungseinrichtung (7) ein Sicherungselement (10) zum Sichern des Klemmstücks (9) aufweist.  wherein the securing device (7) has a securing element (10) for securing the clamping piece (9).
5. Rotor (1) nach Anspruch 4, 5. rotor (1) according to claim 4,
wobei das Sicherungselement (10) als zwischen dem Klemm¬ stück (9) und dem Rotor (1) angeordnetes Sicherungsblech ausgebildet ist. wherein the securing element (10) as between the clamping ¬ piece (9) and the rotor (1) arranged locking plate is formed.
6. Rotor (1) nach Anspruch 4 oder 5, 6. rotor (1) according to claim 4 or 5,
wobei das Sicherungselement (10) einen Vorsprung (28) auf- weist, der in einer im Rotor (1) angeordneten Sicherungsnut wherein the securing element (10) has a projection (28) up in a in the rotor (1) arranged securing groove
(24) angeordnet ist. (24) is arranged.
EP10755152.5A 2009-09-17 2010-09-17 Blade fixation with locking device for turbine blades Not-in-force EP2478187B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10755152.5A EP2478187B1 (en) 2009-09-17 2010-09-17 Blade fixation with locking device for turbine blades

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09011885A EP2299060A1 (en) 2009-09-17 2009-09-17 Blade fixation with locking device for turbine blades
PCT/EP2010/063701 WO2011033063A1 (en) 2009-09-17 2010-09-17 Blade fastening having safety device for turbine blades
EP10755152.5A EP2478187B1 (en) 2009-09-17 2010-09-17 Blade fixation with locking device for turbine blades

Publications (2)

Publication Number Publication Date
EP2478187A1 true EP2478187A1 (en) 2012-07-25
EP2478187B1 EP2478187B1 (en) 2013-07-03

Family

ID=41566145

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09011885A Withdrawn EP2299060A1 (en) 2009-09-17 2009-09-17 Blade fixation with locking device for turbine blades
EP10755152.5A Not-in-force EP2478187B1 (en) 2009-09-17 2010-09-17 Blade fixation with locking device for turbine blades

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09011885A Withdrawn EP2299060A1 (en) 2009-09-17 2009-09-17 Blade fixation with locking device for turbine blades

Country Status (4)

Country Link
US (1) US8956122B2 (en)
EP (2) EP2299060A1 (en)
CN (1) CN102498264B (en)
WO (1) WO2011033063A1 (en)

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IT201600130088A1 (en) * 2016-12-22 2018-06-22 Nuovo Pignone Tecnologie Srl Turbine blade and fastening set
US10385874B2 (en) * 2017-05-08 2019-08-20 Solar Turbines Incorporated Pin to reduce relative rotational movement of disk and spacer of turbine engine
EP3650652B1 (en) * 2018-11-08 2022-01-12 Doosan Skoda Power S.r.o. Fastening of a turbine blade with tree-shaped root in a turbine rotor by means of a deformable fixation wedge and a securing element
KR102400013B1 (en) 2020-08-21 2022-05-18 두산에너빌리티 주식회사 Assembling structure of compressor blade seal and Gas turbine comprising the same and Assembling method of compressor blade seal
KR102478172B1 (en) 2021-02-02 2022-12-14 두산에너빌리티 주식회사 Rotary machine, gas turbine including the same, assembling method of the same
KR102585387B1 (en) * 2021-08-19 2023-10-05 두산에너빌리티 주식회사 Blade fixing structure and rotor, compressor, gas turbine and blade fixing method including the same
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Also Published As

Publication number Publication date
WO2011033063A1 (en) 2011-03-24
US20120177499A1 (en) 2012-07-12
EP2478187B1 (en) 2013-07-03
CN102498264A (en) 2012-06-13
US8956122B2 (en) 2015-02-17
EP2299060A1 (en) 2011-03-23
CN102498264B (en) 2015-02-25

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