EP1402151A1 - Fastening of blades - Google Patents
Fastening of bladesInfo
- Publication number
- EP1402151A1 EP1402151A1 EP02732401A EP02732401A EP1402151A1 EP 1402151 A1 EP1402151 A1 EP 1402151A1 EP 02732401 A EP02732401 A EP 02732401A EP 02732401 A EP02732401 A EP 02732401A EP 1402151 A1 EP1402151 A1 EP 1402151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- disc
- rivet
- extensions
- disk
- 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
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
- F01D5/326—Locking of axial insertion type blades by other means
Definitions
- the invention relates to a fastening of rotor blades to a disk of a turbomachine rotor, according to the preamble of patent claim 1.
- toothed or corrugated feet often referred to as “fir tree feet”, in turbine rotor blades of gas turbines and to hold them in a form-fitting manner in axial disk grooves.
- the contact surfaces of the foot and groove take up the radial centrifugal forces and flow and acceleration-induced circumferential forces and bending moments
- the axial forces must be transmitted by additional elements, for this there are a number of possibilities, such as stop surfaces on one side of the blade feet and sheet metal, rings, wires, etc., which snap into grooves on the other side of the blade feet , whereby screw holes and threads in the highly loaded washers are very critical in terms of strength.
- a disadvantage is that the disk grooves have to be deeper in relation to the blade root than without a rivet or that only a rivet with a relatively small cross-section can be accommodated.
- Another serious disadvantage is that the axial forces in the area of the seat plates are introduced into the rivet heads, the entire rivet shaft being under tension. The notch effect at the shaft / head transitions creates an acute risk of breakage under tension. At least plastic deformations can occur, which increasingly loosen the connection.
- the object of the present invention is to provide a blade attachment with rivet connection, which with moderate design effort and high ease of assembly and repair as well as small space requirements is significantly better in terms of strength and is therefore safer and more reliable.
- each rivet is arranged in a radial plane with respect to the axis of rotation of the disk and thus transversely to the axial forces that occur. This means that only the rivet shaft is subjected to shear, the rivet heads are largely load-free. If at all, tensile stresses only occur in unproblematic size, since they only result from acceleration forces and centrifugal forces from the low rivet mass. Rivets with a relatively large shaft diameter, i.e. large thickness are used with the advantage of low surface pressure and low shear stresses in the shaft.
- the "bore halves" in the blade root and disc extensions enclose the rivet shafts as far as possible and ensure a favorable introduction of force.
- Figure 1 is a partial spatial view of the attachment area of three blades on a disc
- Figure 2 is a partial view of the area of the rivet attachment in the longitudinal direction of the rivet.
- FIG. 1 is a copy of a spatial computer graphic, which represents the attachment according to the invention using three blades 1 on a disk 6 as an example. Of the blades 1, only the platform close to the disk, ie the inner annular space boundary, and the blade root 2 can be seen. The respective airfoil is above the illustration.
- Each blade root 2 has a cross-section similar to a fir tree with two mirror-symmetrical projections 3, 4 on each side and is held in a form-fitting manner by a disk groove 7.
- the disk grooves 7 generally run axially, but they can also be rotated by a defined rotation around an imaginary radial axis, for example the threading axis of the felprofile, at a small angle to the axial direction. However, this is irrelevant to the principle of the invention.
- the blade roots 2 and the disk 6 have axial extensions 5, 8, which are opposed in pairs.
- a common bore 9 is formed in a pair of extensions 5, 8, into which a rivet 10 is inserted and fixed by plastic deformation.
- FIG 1 as an example rivets 10 with Senkk 'opf 1 1 shown in yet undeformed state.
- the axes X of the bores 9 and thus of the rivets 10 lie tangentially on an imaginary circle, not shown, which is concentric with the axis of rotation of the disk 6.
- the smallest distance A in the circumferential direction between the extensions 8 at adjacent blade positions is greater than the length L of an undeformed rivet 10 in order to be able to mount and rivet the latter.
- the space requirement of the riveting tool must also be taken into account.
- the extensions might also have to be adjusted in their position.
- Angled to radial arrangements can bring advantages in terms of assembly technology, however centrifugal force components in the longitudinal direction of the rivet and lateral forces also act on the blade bucket feet.
- centrifugal force components in the longitudinal direction of the rivet and lateral forces also act on the blade bucket feet.
- the axis orientation relative to the local tangential or radial direction should be the same for each rivet on the disk circumference.
- FIG. 2 shows a partial view in the direction of the axis X of the bore 9 and thus of the rivet 10.
- the radial plane R which is transverse to the axis of rotation of the disk 6 and in which the axes X of all the bores 9 and rivets are vertical, is indicated by dash-dotted lines 10 should lie, here as in Figure 1 with tangential orientation. It can be seen that the axial extension 5 of the blade root 2 and the axial extension 8 of the disk 6 are at a small radial distance from one another. It can also be seen that the bore 9 is approximately half-molded into both extensions 5 and 8, the rivet 10 being largely enclosed. The countersunk head 1 1 of the rivet 10 is indicated here by dash-dotted lines.
- rivets with different head shapes can be used. It should be taken into account that the rivets must be removable / replaceable without damaging the blades and washer. lowering Head-like rivet ends are probably easier to grip and separate than heads with large, flat contact surfaces.
Abstract
The fastening of blades on a disc of a turbomachine with blade bases, which have a mirror symmetric cross-section with projections, with axial disc grooves that hold the blade bases in a positive manner and with one riveted joint per blade for each axial fixing. Each blade base and the disc have, in the area of each blade base, axial extensions, whereby the extensions of the blade and disk are located opposite one another in pairs. One respective boring, which lies in a radial plane relative to the disc axis, is provided half in the extension of the blade and half in the extension of the disc, and a rivet is inserted into each boring while being fixed by plastic deformation.
Description
Befestigung von Laufschaufeln Attachment of blades
Die Erfindung betrifft eine Befestigung von Laufschaufeln an einer Scheibe eines Turbomaschinenrotors, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a fastening of rotor blades to a disk of a turbomachine rotor, according to the preamble of patent claim 1.
Es ist üblich, Turbinenlaufschaufeln von Gasturbinen mit gezahnten bzw. gewellten Füßen, häufig als „Tannenbaumfüße" bezeichnet, zu versehen und diese in axialen Scheibennuten formschlüssig zu halten. Die Kontaktflächen von Fuß und Nut nehmen die radialen Fliehkräfte sowie strömungs- und beschleunigungsinduzierte Umfangskräfte und Biegemomente auf. Die Axialkräfte müssen durch zusätzliche Elemente übertragen werden. Hierfür gibt es eine Reihe von Möglichkeiten, wie z.B. Anschlagflächen an einer Seite der Schaufelfüße und formschlüssig in Nuten auf der anderen Seite der Schaufelfüße einrastende Bleche, Ringe, Drähte etc.. Auch Schraubbefestigungen sind bekannt, wobei Schraubenlöcher und Gewinde in den hochbelasteten Scheiben festigkeitstechnisch sehr kritisch sind.It is customary to provide toothed or corrugated feet, often referred to as “fir tree feet”, in turbine rotor blades of gas turbines and to hold them in a form-fitting manner in axial disk grooves. The contact surfaces of the foot and groove take up the radial centrifugal forces and flow and acceleration-induced circumferential forces and bending moments The axial forces must be transmitted by additional elements, for this there are a number of possibilities, such as stop surfaces on one side of the blade feet and sheet metal, rings, wires, etc., which snap into grooves on the other side of the blade feet , whereby screw holes and threads in the highly loaded washers are very critical in terms of strength.
Aus der DE 195 16 694 A1 ist eine gattungsgemäße Befestigung bekannt, die eine Nietverbindung zur Aufnahme der Axialkräfte vorsieht. Pro Laufschaufel ist ein Niet vorhanden, der axial zwischen Laufschaufelfuß und Scheibennutgrund von einer bis zur gegenüberliegenden Scheibenstirnseite geführt ist. Die beiden Nietköpfe liegen auf Sitzplatten auf, die kleine Maßtoleranzen zwischen Schaufel und Scheibe ausgleichen können. Beim Schaufeltausch können die Nietköpfe z.B. durch Bohren entfernt werden, ohne die Gefahr, die Scheibe oder die Schaufel zu beschädigen. Die relativ billigen Sitzplatten werden ohnehin erneuert, so dass deren Beschädigung beim Entfernen des Niets keine Rolle spielt. Es wird zugestanden, dass diese Lösung relativ einfach, preiswert sowie montage- und reparaturfreundlich ist. Ein Nachteil ist jedoch, dass die Scheibennuten in Relation zum Schaufelfuß tiefer sein müssen als ohne Niet bzw. dass nur ein Niet mit relativ kleinem Querschnitt Platz findet. Ein weiterer, gravierender Nachteil liegt darin, dass die Axialkräfte im Bereich der Sitzplatten in die Nietköpfe eingeleitet werden, wobei der gesamte Nietschaft unter Zugspannung steht. Durch die Kerbwirkung an den Übergängen Schaft/Kopf besteht unter Zugspannung akute Bruchgefahr. Zumindest können plastische Verformungen auftreten, die die Verbindung zunehmend lockern.From DE 195 16 694 A1 a generic fastening is known which provides a rivet connection for absorbing the axial forces. There is one rivet per blade, which is guided axially between the blade root and the disc groove base from one to the opposite face of the disc. The two rivet heads rest on seat plates that can compensate for small dimensional tolerances between the shovel and disc. When replacing the shovel, the rivet heads can e.g. can be removed by drilling without the risk of damaging the disc or the blade. The relatively cheap seat plates are renewed anyway, so that their damage does not matter when removing the rivet. It is conceded that this solution is relatively simple, inexpensive and easy to assemble and repair. A disadvantage, however, is that the disk grooves have to be deeper in relation to the blade root than without a rivet or that only a rivet with a relatively small cross-section can be accommodated. Another serious disadvantage is that the axial forces in the area of the seat plates are introduced into the rivet heads, the entire rivet shaft being under tension. The notch effect at the shaft / head transitions creates an acute risk of breakage under tension. At least plastic deformations can occur, which increasingly loosen the connection.
Demgegenüber besteht die Aufgabe der vorliegenden Erfindung darin, eine Laufschaufelbefestigung mit Nietverbindung bereitzustellen, die bei mäßigem konstruktivem Aufwand und
hoher Montage- und Reparaturfreundlichkeit sowie geringem Platzbedarf festigkeitstechnisch deutlich besser und somit sicherer und zuverlässiger ist.In contrast, the object of the present invention is to provide a blade attachment with rivet connection, which with moderate design effort and high ease of assembly and repair as well as small space requirements is significantly better in terms of strength and is therefore safer and more reliable.
Diese Aufgabe wird durch die in Patentanspruch 1 gekennzeichneten Merkmale gelöst, in Verbindung mit den gattungsbildenden Merkmalen in dessen Oberbegriff. Das Wesen der Erfindung liegt darin, dass jeder Niet in einer Radialebene bezüglich der Rotationsachse der Scheibe und somit quer zu den auftretenden Axialkräften angeordnet ist. Somit wird nur noch der Nietschaft auf Scherung belastet, die Nietköpfe sind weitestgehend lastfrei. Zugspannungen treten, falls überhaupt, nur noch in unproblematischer Größe auf, da sie nur aus Beschleunigungskräften und Fliehkräften aus der geringen Nietmasse resultieren. Es können Niete mit relativ großem Schaftdurchmesser, d.h. großer Dicke verwendet werden mit dem Vorteil geringer Oberflächenpressung und kleiner Scherspannungen im Schaft. Die „Bohrungshälften" in den Laufschaufelfuß- und Scheibenfortsätzen umschließen die Nietschäfte weitestgehend und sorgen für eine günstige Krafteinleitung.This object is achieved by the features characterized in claim 1, in conjunction with the generic features in the preamble. The essence of the invention is that each rivet is arranged in a radial plane with respect to the axis of rotation of the disk and thus transversely to the axial forces that occur. This means that only the rivet shaft is subjected to shear, the rivet heads are largely load-free. If at all, tensile stresses only occur in unproblematic size, since they only result from acceleration forces and centrifugal forces from the low rivet mass. Rivets with a relatively large shaft diameter, i.e. large thickness are used with the advantage of low surface pressure and low shear stresses in the shaft. The "bore halves" in the blade root and disc extensions enclose the rivet shafts as far as possible and ensure a favorable introduction of force.
In den Unteransprüchen sind bevorzugte Ausgestaltungen der erfindungsgemäßen Befestigung gekennzeichnet.Preferred embodiments of the fastening according to the invention are characterized in the subclaims.
Die Erfindung wird anschließend anhand der Zeichnungen noch näher erläutert. Dabei zeigen in vereinfachter, nicht maßstäblicher Darstellung:The invention is explained in more detail with reference to the drawings. Simplified, not to scale, show:
Figur 1 eine räumliche Teilansicht des Befestigungsbereiches dreier Laufschaufeln an einer Scheibe, und Figur 2 eine Teilansicht des Bereiches der Nietbefestigung in Längsrichtung des Niets.Figure 1 is a partial spatial view of the attachment area of three blades on a disc, and Figure 2 is a partial view of the area of the rivet attachment in the longitudinal direction of the rivet.
Figur 1 ist die Kopie einer räumlichen Computergrafik, welche am Beispiel dreier Laufschaufeln 1 an einer Scheibe 6 die erfindungsgemäße Befestigung darstellt. Von den Laufschaufeln 1 sind jeweils nur die scheibennahe Plattform, d.h. die innere Ringraumbegrenzung, und der Laufschaufelfuß 2 erkennbar. Das jeweilige Schaufelblatt liegt oberhalb der Darstellung. Jeder Laufschaufelfuß 2 ist im Querschnitt tannenbaumähnlich mit zwei spiegelsymmetrischen Vorsprüngen 3,4 auf jeder Seite ausgeführt und wird von einer Scheibennut 7 formschlüssig gehalten. Die Scheibennuten 7 verlaufen in der Regel axial, sie können aber auch durch definierte Drehung um eine gedachte Radialachse, z.B. die Auffädelachse der Schau-
felprofile, in einem kleinen Winkel zur Axialrichtung stehen. Dies ist für das Prinzip der Erfindung jedoch unerheblich.FIG. 1 is a copy of a spatial computer graphic, which represents the attachment according to the invention using three blades 1 on a disk 6 as an example. Of the blades 1, only the platform close to the disk, ie the inner annular space boundary, and the blade root 2 can be seen. The respective airfoil is above the illustration. Each blade root 2 has a cross-section similar to a fir tree with two mirror-symmetrical projections 3, 4 on each side and is held in a form-fitting manner by a disk groove 7. The disk grooves 7 generally run axially, but they can also be rotated by a defined rotation around an imaginary radial axis, for example the threading axis of the felprofile, at a small angle to the axial direction. However, this is irrelevant to the principle of the invention.
Die Laufschaufelfüße 2 und die Scheibe 6 weisen axiale Fortsätze 5,8 auf, welche sich jeweils paarweise gegenüberstehen. In ein Paar von Fortsätzen 5,8 ist eine gemeinsame Bohrung 9 eingeformt, in die ein Niet 10 gesteckt und durch plastische Verformung fixiert wird. In Figur 1 sind als Beispiel Niete 10 mit Senkk'opf 1 1 in noch unverformtem Zustand dargestellt. Die Achsen X der Bohrungen 9 und somit der Niete 10 liegen tangential an einem gedachten, zur Rotationsachse der Scheibe 6 konzentrischen, nicht dargestellten Kreis. Der kleinste Abstand A in Umfangsrichtung zwischen den Fortsätzen 8 an benachbarten Schaufelpositionen ist größer als die Länge L eines unverformten Niets 10, um letzteren montieren und vernieten zu können. Hierbei ist auch der Platzbedarf des Nietwerkzeugs zu berücksichtigen. Abweichend von der dargestellten, tangentialen Orientierung der Bohrungs- und Nietachsen X können diese in ihrer gemeinsamen Radialebene auch in jeder beliebigen Winkelposition zwischen tangential und radial sowie in rein radialer Position orientiert sein. Dabei müssten ggf. auch die Fortsätze in ihrer Lage angepasst werden. Schräge bis radiale Anordnungen können montagetechnische Vorteile bringen, allerdings wirken dann auch Fliehkraftkomponenten in Nietlängsrichtung sowie Seitenkräfte auf die Laμfschaufelfüße. Entscheidend für die Aufnahme der axialen Schaufelkräfte ist aber letztlich, dass die Bohrungs- und Nietachsen in einer gemeinsamen Radialebene bezüglich der Scheibenachse verbleiben. Natürlich soll die Achsorientierung relativ zur örtlichen Tangential- bzw. Radialrichtung bei jedem Niet am Scheibenumfang gleich sein.The blade roots 2 and the disk 6 have axial extensions 5, 8, which are opposed in pairs. A common bore 9 is formed in a pair of extensions 5, 8, into which a rivet 10 is inserted and fixed by plastic deformation. In Figure 1, as an example rivets 10 with Senkk 'opf 1 1 shown in yet undeformed state. The axes X of the bores 9 and thus of the rivets 10 lie tangentially on an imaginary circle, not shown, which is concentric with the axis of rotation of the disk 6. The smallest distance A in the circumferential direction between the extensions 8 at adjacent blade positions is greater than the length L of an undeformed rivet 10 in order to be able to mount and rivet the latter. The space requirement of the riveting tool must also be taken into account. Deviating from the tangential orientation of the bore and rivet axes X shown, they can also be oriented in their common radial plane in any angular position between tangential and radial and in a purely radial position. The extensions might also have to be adjusted in their position. Angled to radial arrangements can bring advantages in terms of assembly technology, however centrifugal force components in the longitudinal direction of the rivet and lateral forces also act on the blade bucket feet. Ultimately, it is decisive for the absorption of the axial blade forces that the bore and rivet axes remain in a common radial plane with respect to the disc axis. Of course, the axis orientation relative to the local tangential or radial direction should be the same for each rivet on the disk circumference.
Figur 2 zeigt zur weiteren Verdeutlichung eine Teilansicht in Richtung der Achse X der Bohrung 9 und somit des Niets 10. Vertikal strichpunktiert ist die Radialebene R angedeutet, welche quer zur Rotationsachse der Scheibe 6 steht, und in der die Achsen X aller Bohrungen 9 und Niete 10 liegen sollen, hier wie in Figur 1 mit tangentialer Orientierung. Man erkennt, dass sich der axiale Fortsatz 5 des Laufschaufelfußes 2 und der axiale Fortsatz 8 der Scheibe 6 in geringem radialem Abstand gegenüberstehen. Man erkennt auch, dass die Bohrung 9 etwa je zur Hälfte in beide Fortsätze 5 und 8 eingeformt ist, wobei der Niet 10 weitestgehend umschlossen wird. Der Senkkopf 1 1 des Niets 10 ist hier strichpunktiert angedeutet. Es wurde bereits erwähnt, dass Niete mit verschiedenen Kopfformen verwendbar sind. Dabei ist zu berücksichtigen, dass die Niete entfernbar/austauschbar sein müssen, ohne Schaufeln und Scheibe zu beschädigen. Senk-
kopfähnliche Nietenden sind dabei wahrscheinlich leichter zu greifen und abzutrennen als Köpfe mit großen, ebenen Auflageflächen.
For further clarification, FIG. 2 shows a partial view in the direction of the axis X of the bore 9 and thus of the rivet 10. The radial plane R, which is transverse to the axis of rotation of the disk 6 and in which the axes X of all the bores 9 and rivets are vertical, is indicated by dash-dotted lines 10 should lie, here as in Figure 1 with tangential orientation. It can be seen that the axial extension 5 of the blade root 2 and the axial extension 8 of the disk 6 are at a small radial distance from one another. It can also be seen that the bore 9 is approximately half-molded into both extensions 5 and 8, the rivet 10 being largely enclosed. The countersunk head 1 1 of the rivet 10 is indicated here by dash-dotted lines. It has already been mentioned that rivets with different head shapes can be used. It should be taken into account that the rivets must be removable / replaceable without damaging the blades and washer. lowering Head-like rivet ends are probably easier to grip and separate than heads with large, flat contact surfaces.
Claims
1. Befestigung von Laufschaufeln an einer Scheibe eines Turbomaschinenrotors, insbesondere von Turbinenlaufschaufeln an einer Scheibe eines Gasturbinenrotors, mit Laufschaufelfüßen, die zumindest über den Großteil ihrer axialen Länge einen konstanten Querschnitt mit spiegelsymmetrischen, zahn- oder wellenartigen Vorsprüngen aufweisen, mit die Laufschaufelfüße in Radial- und in Umfangsrichtung formschlüssig haltenden, zumindest vorwiegend axial verlaufenden Scheibennuten sowie mit jeweils einer Nietverbindung pro Laufschaufel für deren axiale Fixierung an der Scheibe, dadurch gekennzeichnet, dass sowohl jeder Laufschaufelfuß (2) als auch die Scheibe (6) im Bereich jedes Laufschaufelfußes (2) jeweils einen axialen, integralen Fortsatz (5,8) aufweisen, dass sich die Fortsätze (5,8) von Laufschaufel (1) und Scheibe (6) in geringem Abstand oder in gegenseitigem Kontakt paarweise gegenüberstehen, dass jeweils eine mit ihrer Achse (X) in einer Radialebene (R), d.h. in einer Querebene zur Rotationsachse der Scheibe (6) liegende Bohrung (9) etwa zur Hälfte in den Fortsatz (5) des Laufschaufelfußes (2) und etwa zur Hälfte in den Fortsatz (8) der Scheibe (6) eingeformt ist, und dass in jede Bohrung (9) ein Niet (10) eingesetzt und durch plastische Verformung fixiert ist.1. Fastening of rotor blades on a disk of a turbomachine rotor, in particular of turbine rotor blades on a disk of a gas turbine rotor, with rotor blade feet which have a constant cross-section at least over the majority of their axial length with mirror-symmetrical, tooth-like or wave-like projections, with the rotor blade feet in radial and at least predominantly axially extending disc grooves in the circumferential direction and with one rivet connection per blade for their axial fixing to the disc, characterized in that both the blade root (2) and the disc (6) in the region of each blade root (2) each have an axial, integral extension (5, 8) such that the extensions (5, 8) of the rotor blade (1) and the disk (6) face each other in pairs at a short distance or in mutual contact, so that each has an axis (X ) in a radial plane (R), ie in a transverse plane to the axis of rotation of the disc (6) is located approximately half of the bore (9) in the extension (5) of the blade root (2) and approximately half in the extension (8) of the disc (6), and that in a rivet (10) is inserted into each hole (9) and is fixed by plastic deformation.
2. Befestigung nach Anspruch 1, dadurch gekennzeichnet, dass alle in die Fortsätze (5) der Laufschaufelfüße (2) und in die Fortsätze (8) der Scheibe (6) eingeformten Bohrungen (9) mit ihren Achsen (X) bezüglich der Rotationsachse der Scheibe (6) in gleicher Weise entweder tangential oder definiert schräg mit tangentialer und radialer Komponente oder radial ausgerichtet sind.2. Fastening according to claim 1, characterized in that all in the extensions (5) of the blade feet (2) and in the extensions (8) of the disc (6) molded holes (9) with their axes (X) with respect to the axis of rotation of the Disc (6) are aligned in the same way either tangentially or obliquely with tangential and radial components or radially.
3. Befestigung nach Anspruch 2 mit tangential ausgerichteten Bohrungen, dadurch gekennzeichnet, dass die paarweise angeordneten Fortsätze (5,8) der Laufschaufelfüße (2) und der Scheibe (6) von einer Schaufelposition zu einer benachbarten Schaufelposition einen minimalen Abstand (A) in Umfangsrichtung aufweisen, der definiert größer ist als die Länge (L) eines unverformten Nietes (10). 3. Fastening according to claim 2 with tangentially aligned bores, characterized in that the paired extensions (5,8) of the blade feet (2) and the disc (6) from a blade position to an adjacent blade position a minimum distance (A) in the circumferential direction have, which is defined greater than the length (L) of an undeformed rivet (10).
4. Befestigung nach einem oder mehreren der Ansprüche \ bis 3, dadurch gekennzeichnet, dass Niete mit Halbrundkopf und ebener Kopfauflagefläche oder, Niete (10) mit Senkkopf (1 1) verwendet werden, wobei in letzterem Fall die Bohrungen (9) nietkopfsei- tig mit einer passenden Ansenkung versehen sein können.4. Fastening according to one or more of claims \ to 3, characterized in that rivets with a semicircular head and a flat head contact surface or rivets (10) with a countersunk head (11) are used, the bores (9) on the rivet head side in the latter case can be provided with a suitable countersink.
5. Befestigung nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass handelsübliche Standardniete zur Anwendung kommen.5. Fastening according to one or more of claims 1 to 4, characterized in that commercially available standard rivets are used.
6. Befestigung nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Nietwerkstoff eine geringere mechanische Festigkeit und Härte aufweist als der Laufschaufelwerkstoff und der Scheibenwerkstoff jeweils im Bereich der Fortsätze (5,8). 6. Fastening according to one or more of claims 1 to 5, characterized in that the rivet material has a lower mechanical strength and hardness than the blade material and the disk material in each case in the region of the extensions (5,8).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10128505 | 2001-06-14 | ||
| DE10128505A DE10128505C2 (en) | 2001-06-14 | 2001-06-14 | Attachment of blades |
| PCT/DE2002/001509 WO2002103166A1 (en) | 2001-06-14 | 2002-04-25 | Fastening of blades |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1402151A1 true EP1402151A1 (en) | 2004-03-31 |
| EP1402151B1 EP1402151B1 (en) | 2006-06-21 |
Family
ID=7688045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02732401A Expired - Lifetime EP1402151B1 (en) | 2001-06-14 | 2002-04-25 | Fastening of blades |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7090468B2 (en) |
| EP (1) | EP1402151B1 (en) |
| DE (2) | DE10128505C2 (en) |
| WO (1) | WO2002103166A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2939834B1 (en) * | 2008-12-17 | 2016-02-19 | Turbomeca | TURBINE WHEEL WITH AXIAL RETENTION SYSTEM OF AUBES |
| US8905717B2 (en) | 2010-10-06 | 2014-12-09 | General Electric Company | Turbine bucket lockwire rotation prevention |
| US9112383B2 (en) | 2011-10-31 | 2015-08-18 | General Electric Company | System and method for Var injection at a distributed power generation source |
| CN109098777A (en) * | 2018-09-05 | 2018-12-28 | 中国航发动力股份有限公司 | A kind of flue gas turbine expander disc slot is to connection structure and its application method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014162B2 (en) * | 1978-07-21 | 1985-04-11 | 株式会社日立製作所 | Wing fixed structure |
| US4444544A (en) * | 1980-12-19 | 1984-04-24 | United Technologies Corporation | Locking of rotor blades on a rotor disk |
| US4389161A (en) * | 1980-12-19 | 1983-06-21 | United Technologies Corporation | Locking of rotor blades on a rotor disk |
| US5302086A (en) * | 1992-08-18 | 1994-04-12 | General Electric Company | Apparatus for retaining rotor blades |
| FR2700807B1 (en) * | 1993-01-27 | 1995-03-03 | Snecma | Retention and sealing system for blades engaged in axial pinning of a rotor disc. |
| DE19516694C2 (en) * | 1995-05-06 | 2001-06-28 | Mtu Aero Engines Gmbh | Device for fixing blades to the impeller, in particular a turbine of a gas turbine engine |
-
2001
- 2001-06-14 DE DE10128505A patent/DE10128505C2/en not_active Expired - Fee Related
-
2002
- 2002-04-25 US US10/480,164 patent/US7090468B2/en not_active Expired - Fee Related
- 2002-04-25 DE DE50207310T patent/DE50207310D1/en not_active Expired - Lifetime
- 2002-04-25 EP EP02732401A patent/EP1402151B1/en not_active Expired - Lifetime
- 2002-04-25 WO PCT/DE2002/001509 patent/WO2002103166A1/en active IP Right Grant
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02103166A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10128505C2 (en) | 2003-04-30 |
| US20040184917A1 (en) | 2004-09-23 |
| EP1402151B1 (en) | 2006-06-21 |
| WO2002103166A1 (en) | 2002-12-27 |
| DE10128505A1 (en) | 2003-01-02 |
| DE50207310D1 (en) | 2006-08-03 |
| US7090468B2 (en) | 2006-08-15 |
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