EP1529962A2 - Compressor rotor blade - Google Patents

Compressor rotor blade Download PDF

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Publication number
EP1529962A2
EP1529962A2 EP04105319A EP04105319A EP1529962A2 EP 1529962 A2 EP1529962 A2 EP 1529962A2 EP 04105319 A EP04105319 A EP 04105319A EP 04105319 A EP04105319 A EP 04105319A EP 1529962 A2 EP1529962 A2 EP 1529962A2
Authority
EP
European Patent Office
Prior art keywords
blade
compressor
trailing edge
tip
compressor blade
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.)
Withdrawn
Application number
EP04105319A
Other languages
German (de)
French (fr)
Other versions
EP1529962A3 (en
Inventor
Rene Bachofner
Wolfgang Kappis
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.)
General Electric Technology GmbH
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 EP1529962A2 publication Critical patent/EP1529962A2/en
Publication of EP1529962A3 publication Critical patent/EP1529962A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/16—Form or construction for counteracting blade vibration
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/20—Specially-shaped blade tips to seal space between tips and stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/324—Blades
    • 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
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/301—Cross-sectional characteristics

Definitions

  • the invention relates to a compressor blade having the features the preamble of the independent claim.
  • a generic compressor blade is known from EP 0 991 866 B1.
  • Such compressor blades have the disadvantage that they Excitation of high frequencies (Lyra mode) so vibrated be that in particular the profile tips of increased mechanical stress are exposed. This can cause significant damage to the Compressor blades lead to a breakage.
  • the basic idea of the invention is that of the blade on the Blade tip in an area in front of the blade trailing edge with a recess equip.
  • the airfoil starts at the blade tip From the blade leading edge first on a pristine area, which by a stepped step or a curve in one to the blade trailing edge reaching recess passes.
  • FIG. 1 shows an embodiment of a compressor blade 1 according to the invention, which comprises an airfoil 2, a platform 3 and a blade root 4.
  • the compressor blades 1 are arranged over the circumference of a rotor (not shown). They are not connected by a shroud.
  • the blade 2 of the compressor blade 1 has a blade tip 2, a front edge 5, a trailing edge 6 and a pressure and a suction side.
  • the compressor blade 1 is solid and has no internal cooling system. According to the invention, the blade 2 of the compressor blade 1 is provided on the blade tip 7 with a recess 8.
  • This recess 8 extends over an exit-side region of the blade tip 7 to the trailing edge 6, wherein the pristine length I 1 from the front edge 5 of the compressor blade 1 to the beginning of the recess 20% to 60%, preferably 30% to 50% and especially preferably between 30% and 40% of the axial chord length of the compressor blade 1.
  • the transition from the untouched region of the blade tip 7 to the recess 8 is effected by a step-shaped shoulder 9, wherein the edges of the shoulder 9 are formed with a radius R 1 of about 2mm to 5mm to avoid notch effects.
  • the blade surface within the recess 8 extends substantially parallel to the original contour of the blade tip 7, which is indicated in the figures by dashed lines.
  • the depth h 1 of the recess 8 is about 5% to 10% of the height H of the trailing edge 6.
  • FIG. 2 shows a further embodiment of a compressor blade 1 according to the invention, the essential feature of which is a rounded recess 10 of the outlet-side blade tip 7.
  • the transition from the blade tip 7 to the trailing edge 6 is formed in the form of a Abru tion 10 with a radius R 2 , wherein R 2 corresponds to 0.5 to 1.5 times the chord length of the blade 1.
  • the blade tip 7 merges into the trailing edge 6 in a radius R 2 which corresponds to the chord length.
  • the area of the untouched length I 2 of the blade tip 7 in this case is about 50% to 80%, preferably 60% to 70% of the chord length.
  • the depth h 2 of the recess 8 at the trailing edge will regularly be below 30%, in particular below 20%, preferably between 10% and 20% of the length of the trailing edge 6.
  • the outlet-side blade tip is formed by a bevel 11, which merges through one rounding with a radius R 3 at one end into the blade tip 7 and at the other end into the trailing edge 6.
  • the bevel 11 assumes an angle ⁇ of 20 ° to 60 °, preferably from 30 ° to 45 ° to the trailing edge 6 a.
  • the untouched length I 3 of the blade tip 7 is about 50% to 80%, preferably 60% to 70% of the axial chord length of the blade 1.
  • the depth h 3 of the recess 8 at the trailing edge 6 is less than 30%, preferably between 10% and 20% of the height H of the trailing edge 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Compressor blade (1) comprises a blade foot (4), a platform (3), and a solid blade body (2) without an internal cooling system and provided with a blade tip (7), a front edge (5), a rear edge (6) and a pressure side and suction side. The blade body has on its blade tip a recess (8) that extends up to the rear edge. Preferred Features: The blade body has a step-shaped shoulder (9) on its blade tip.

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf eine Verdichterlaufschaufel mit den Merkmalen des Oberbegriffs des unabhängigen Patentanspruchs.The invention relates to a compressor blade having the features the preamble of the independent claim.

Stand der TechnikState of the art

Eine gattungsgemässe Verdichterlaufschaufel ist aus EP 0 991 866 B1 bekannt. Derartige Verdichterlaufschaufeln haben den Nachteil, dass sie durch Anregung hoher Frequenzen (Lyra-Mode) derart in Schwingungen versetzt werden, dass insbesondere die Profilspitzen einer erhöhten mechanischen Beanspruchung ausgesetzt sind. Dies kann zu erheblichen Beschädigungen der Verdichterlaufschaufeln bis hin zu einem Bruch führen.A generic compressor blade is known from EP 0 991 866 B1. Such compressor blades have the disadvantage that they Excitation of high frequencies (Lyra mode) so vibrated be that in particular the profile tips of increased mechanical stress are exposed. This can cause significant damage to the Compressor blades lead to a breakage.

Darstellung der ErfindungPresentation of the invention

Es besteht daher die Aufgabe, eine gattungsgemäße Verdichterlaufschaufel derart weiterzubilden, dass das vorstehend beschriebene Schwingungsverhalten vermindert wird, so dass Beschädigungen infolge überhöhter mechanischer Beanspruchung ausgeschlossen sind. Die betreffenden Maßnahmen sollen konstruktiv möglichst einfach und in der Realisierung kostengünstig sein. There is therefore the task of a generic compressor blade in such a way that the above-described vibration behavior is reduced, so that damage due to excessive mechanical Stress are excluded. The measures in question should constructive as simple as possible and inexpensive to implement.

Erfindungsgemäss wird diese Aufgabe gelöst durch eine Verdichterlaufschaufel mit den Merkmalen des unabhängigen Anspruchs. Den Erfindungsgedanken vorteilhaft weiterbildende Merkmale sind Gegenstand der abhängigen Ansprüche.According to the invention this object is achieved by a compressor blade with the features of the independent claim. The idea of the invention advantageous further-forming features are the subject of the dependent claims.

Der Grundgedanke der Erfindung besteht darin, das Schaufelblatt an der Schaufelspitze in einem Bereich vor der Schaufelhinterkante mit einer Aussparung auszustatten. Das Schaufelblatt weist an der Schaufelspitze ausgehend von der Schaufelvorderkante zunächst einen unberührten Bereich auf, welcher durch einen stufenförmigen Absatz oder eine Rundung in eine bis zur Schaufelhinterkante reichende Aussparung übergeht.The basic idea of the invention is that of the blade on the Blade tip in an area in front of the blade trailing edge with a recess equip. The airfoil starts at the blade tip From the blade leading edge first on a pristine area, which by a stepped step or a curve in one to the blade trailing edge reaching recess passes.

Bei einer erfindungsgemässen Verdichterlaufschaufel werden vorteilhaft Beschädigungen an der austrittsseitigen Schaufelspitze durch den Lyra-Mode vermieden.In a compressor blade according to the invention, damage is advantageously achieved at the exit-side blade tip through the Lyra mode avoided.

Kurze Beschreibung der FigurenBrief description of the figures

Weitere günstige Ausführungsformen und Vorteile der Erfindung werden nachstehend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnungen exemplarisch beschrieben. Es zeigen:

Fig. 1- 3
drei verschiedene Ausführungsformen einer erfindungsgemässen Verdichterlaufschaufel.
Further advantageous embodiments and advantages of the invention will be described below by way of example with reference to an embodiment with reference to the drawings. Show it:
Fig. 1-3
three different embodiments of a compressor blade according to the invention.

Es werden nur die für die Erfindung wesentlichen Merkmale dargestellt.Only the features essential to the invention are shown.

Wege zur Ausführung der ErfindungWays to carry out the invention

Fig. 1 zeigt eine Ausführungsform einer erfindungsgemässen Verdichterlaufschaufel 1, die ein Schaufelblatt 2, eine Plattform 3 und einen Schaufelfuss 4 umfasst. Die Verdichterlaufschaufeln 1 sind über den Umfang eines (nicht dargestellten) Rotors angeordnet. Sie sind nicht durch ein Deckband verbunden. Das Schaufelblatt 2 der Verdichterschaufel 1 weist eine Schaufelspitze 2, eine Vorderkante 5, eine Hinterkante 6 sowie eine Druck- und eine Saugseite auf. Die Verdichterlaufschaufel 1 ist massiv ausgeführt und weist kein internes Kühlsystem auf. Erfindungsgemäss ist das Schaufelblatt 2 der Verdichterlaufschaufel 1 an der Schaufelspitze 7 mit einer Aussparung 8 ausgestattet. Diese Aussparung 8 erstreckt sich über einen austrittseitigen Bereich der Schaufelspitze 7 bis zu der Hinterkante 6, wobei die unberührte Länge I1 von der Vorderkante 5 der Verdichterlaufschaufel 1 bis zum Beginn der Aussparung 20% bis 60%, vorzugsweise 30% bis 50% und besonders bevorzugt zwischen 30% und 40% der axialen Sehnenlänge der Verdichterlaufschaufel 1 ausmacht. Der Übergang von dem unberührten Bereich der Schaufelspitze 7 zu der Aussparung 8 erfolgt durch einen stufenförmigen Absatz 9, wobei zur Vermeidung von Kerbwirkungen die Kanten des Absatzes 9 mit einem Radius R1 von etwa 2mm bis 5mm ausgebildet sind. Die Schaufeloberfläche innerhalb der Aussparung 8 verläuft im wesentlichen parallel zu der ursprünglichen Kontur der Schaufelspitze 7, welche in den Figuren durch strichlierte Linien angedeutet ist. Die Tiefe h1 der Aussparung 8 beträgt etwa 5% bis 10% der Höhe H der Hinterkante 6. Mit dieser erfindungsgemässen Verdichterlaufschaufel 1 werden vorteilhaft Beschädigungen an der austrittsseitigen Schaufelspitze 7 durch den Lyra-Mode bei hohen Frequenzen vermieden.1 shows an embodiment of a compressor blade 1 according to the invention, which comprises an airfoil 2, a platform 3 and a blade root 4. The compressor blades 1 are arranged over the circumference of a rotor (not shown). They are not connected by a shroud. The blade 2 of the compressor blade 1 has a blade tip 2, a front edge 5, a trailing edge 6 and a pressure and a suction side. The compressor blade 1 is solid and has no internal cooling system. According to the invention, the blade 2 of the compressor blade 1 is provided on the blade tip 7 with a recess 8. This recess 8 extends over an exit-side region of the blade tip 7 to the trailing edge 6, wherein the pristine length I 1 from the front edge 5 of the compressor blade 1 to the beginning of the recess 20% to 60%, preferably 30% to 50% and especially preferably between 30% and 40% of the axial chord length of the compressor blade 1. The transition from the untouched region of the blade tip 7 to the recess 8 is effected by a step-shaped shoulder 9, wherein the edges of the shoulder 9 are formed with a radius R 1 of about 2mm to 5mm to avoid notch effects. The blade surface within the recess 8 extends substantially parallel to the original contour of the blade tip 7, which is indicated in the figures by dashed lines. The depth h 1 of the recess 8 is about 5% to 10% of the height H of the trailing edge 6. With this inventive compressor blade 1 damage to the outlet-side blade tip 7 are advantageously avoided by the Lyra mode at high frequencies.

Die Fig. 2 zeigt eine weitere Ausführungsform einer erfindungsgemässen Verdichterlaufschaufel 1, deren wesentliches Merkmal in einer als Abrundung 10 gestalteten Ausnehmung 8 der austrittsseitigen Schaufelspitze 7 besteht. Der Übergang von der Schaufelspitze 7 zur Hinterkante 6 ist in Form einer Abru n-dung 10 mit einem Radius R2 ausgebildet, wobei R2 der 0,5- bis 1,5-fachen Sehnenlänge der Schaufel 1 entspricht. Nach einer günstigen Variante geht die Schaufelspitze 7 in einem Radius R2, welcher der Sehnenlänge entspricht, in die Hinterkante 6 über. Der Bereich der unberührten Länge I2 der Schaufelspitze 7 beträgt hierbei etwa 50% bis 80%, vorzugsweise 60% bis 70% der Sehnenlänge. Die Tiefe h2 der Aussparung 8 an der Hinterkante wird regelmässig unter 30%, insbesondere unter 20%, vorzugsweise zwischen 10% und 20% der Länge der Hinterkante 6 liegen.2 shows a further embodiment of a compressor blade 1 according to the invention, the essential feature of which is a rounded recess 10 of the outlet-side blade tip 7. The transition from the blade tip 7 to the trailing edge 6 is formed in the form of a Abru tion 10 with a radius R 2 , wherein R 2 corresponds to 0.5 to 1.5 times the chord length of the blade 1. According to a favorable variant, the blade tip 7 merges into the trailing edge 6 in a radius R 2 which corresponds to the chord length. The area of the untouched length I 2 of the blade tip 7 in this case is about 50% to 80%, preferably 60% to 70% of the chord length. The depth h 2 of the recess 8 at the trailing edge will regularly be below 30%, in particular below 20%, preferably between 10% and 20% of the length of the trailing edge 6.

Nach einer weiteren alternativen Ausführungsform einer Verdichterlaufschaufel 1 gemäss Fig. 3 ist die austrittsseitige Schaufelspitze durch eine Schräge 11 gebildet, welche durch je eine Abrundung mit einem Radius R3 einenends in die Schaufelspitze 7 und anderenends in die Hinterkante 6 übergeht. Die Abschrägung 11 nimmt einen Winkel α von 20° bis 60°, vorzugsweise von 30° bis 45° zur Hinterkante 6 ein. Auch bei dieser Ausführungsform beträgt die unberührte Länge I3 der Schaufelspitze 7 etwa 50% bis 80%, vorzugsweise 60% bis 70% der axialen Sehnenlänge der Schaufel 1. Die Tiefe h3 der Aussparung 8 an der Hinterkante 6 liegt unter 30%, vorzugsweise zwischen 10% und 20% der Höhe H der Hinterkante 6. Mit dieser erfindungsgemässen Verdichterlaufschaufel 1 werden ebenfalls vorteilhaft Beschädigungen an der austrittsseitigen Schaufelspitze durch den Lyra-Mode bei hohen Frequenzen vermieden.
Die Masseneinsparung, die sich durch die Aussparung 8 an der Verdichterlaufschaufel 1 ergibt, ist in den Ausführungsformen gemäss der Figuren 1 bis 3 annähernd gleich. According to a further alternative embodiment of a compressor blade 1 according to FIG. 3, the outlet-side blade tip is formed by a bevel 11, which merges through one rounding with a radius R 3 at one end into the blade tip 7 and at the other end into the trailing edge 6. The bevel 11 assumes an angle α of 20 ° to 60 °, preferably from 30 ° to 45 ° to the trailing edge 6 a. Also in this embodiment, the untouched length I 3 of the blade tip 7 is about 50% to 80%, preferably 60% to 70% of the axial chord length of the blade 1. The depth h 3 of the recess 8 at the trailing edge 6 is less than 30%, preferably between 10% and 20% of the height H of the trailing edge 6. With this compressor blade 1 according to the invention, damage to the outlet-side blade tip is likewise advantageously avoided by the Lyra mode at high frequencies.
The mass saving resulting from the recess 8 on the compressor blade 1 is approximately equal in the embodiments according to FIGS. 1 to 3.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
VerdichterlaufschaufelCompressor blade
22
Schaufelblattairfoil
33
Plattformplatform
44
Schaufelfussblade root
55
Vorderkanteleading edge
66
Hinterkantetrailing edge
77
Schaufelspitzeblade tip
88th
Aussparungrecess
99
Absatzparagraph
1010
Abrundungrounding off
1111
Abschrägungbevel
R1 R 1
Radiusradius
R2 R 2
Radiusradius
R3 R 3
Radiusradius
I1 I 1
unberührte Längeuntouched length
I2 I 2
unberührte Längeuntouched length
I3 I 3
unberührte Längeuntouched length
HH
Höhe der Hinterkante 6Height of the trailing edge 6
h1 h 1
Tiefe der Aussparung an Hinterkante 6Depth of the recess at trailing edge 6
h2 h 2
Tiefe der Aussparung an Hinterkante 6Depth of the recess at trailing edge 6
h3 h 3
Tiefe der Aussparung an Hinterkante 6Depth of the recess at trailing edge 6

Claims (19)

Verdichterlaufschaufel, umfassend einen Schaufelfuss (4), eine Plattform (3) und ein Schaufelblatt (2), welches Schaufelblatt (2) massiv ohne internes Kühlsystem ausgeführt ist und eine Schaufelspitze (7), eine Vorderkante (5), eine Hinterkante (6) sowie eine Druck- und eine Saugseite aufweist,
dadurch gekennzeichnet, dass das Schaufelblatt (2) an der Schaufelspitze (7) eine Aussparung (8) aufweist, die sich bis zur Hinterkante (6) erstreckt.A compressor blade comprising a blade root (4), a platform (3) and an airfoil (2), which airfoil (2) is solid with no internal cooling system and a blade tip (7), a leading edge (5), a trailing edge (6) and has a pressure and a suction side,
characterized in that the blade (2) on the blade tip (7) has a recess (8) which extends to the trailing edge (6). Verdichterlaufschaufel nach Anspruch 1, dadurch gekennzeichnet, dass das Schaufelblatt (2) an der Schaufelspitze (7) einen stufenförmigen Absatz (9) aufweist.A compressor blade according to claim 1, characterized in that the blade (2) on the blade tip (7) has a stepped shoulder (9). Verdichterlaufschaufel nach Anspruch 2, dadurch gekennzeichnet, dass die unberührte Länge (I1) der Schaufelspitze (7) 20% bis 60% der axialen Sehnenlänge der Schaufel (1) beträgt.A compressor blade according to claim 2, characterized in that the untouched length (I 1 ) of the blade tip (7) is 20% to 60% of the axial chord length of the blade (1). Verdichterlaufschaufel nach Anspruch 3, dadurch gekennzeichnet, dass die unberührte Länge (I1) der Schaufelspitze (7) 30% bis 50%, insbesondere 30% bis 40% der axialen Sehnenlänge beträgt.Compressor blade according to claim 3, characterized in that the pristine length (I 1 ) of the blade tip (7) is 30% to 50%, in particular 30% to 40% of the axial chord length. Verdichterlaufschaufel nach Anspruch 2, dadurch gekennzeichnet, dass der stufenförmige Absatz (9) eine Tiefe (h1) von etwa 5% bis 10 % der Höhe (H) der Schaufelhinterkante (6) besitzt.A compressor blade according to claim 2, characterized in that the stepped shoulder (9) has a depth (h 1 ) of about 5% to 10% of the height (H) of the blade trailing edge (6). Verdichterlaufschaufel nach Anspruch 1, dadurch gekennzeichnet, dass die Schaufelspitze (7) des Schaufelblatts (2) austrittseitig eine Abrundung (10) zur Schaufelhinterkante (6) hin aufweist. Compressor blade according to claim 1, characterized in that the blade tip (7) of the blade (2) on the outlet side has a rounding (10) to the blade trailing edge (6) out. Verdichterlaufschaufel nach Anspruch 6, dadurch gekennzeichnet, dass die Abrundung (10) einen Radius (R2) von der 0,5- bis 1,5-fachen Sehnenlänge besitzt.A compressor blade according to claim 6, characterized in that the rounding (10) has a radius (R 2 ) of 0.5 to 1.5 times chord length. Verdichterlaufschaufel nach Anspruch 7, dadurch gekennzeichnet, dass der Radius R2 der axialen Sehnenlänge der Schaufel (1) entspricht.A compressor blade according to claim 7, characterized in that the radius R 2 corresponds to the axial chord length of the blade (1). Verdichterlaufschaufel nach Anspruch 6, dadurch gekennzeichnet, dass die unberührte Länge (I2) der Schaufelspitze (7) 50% bis 80% der axialen Sehnenlänge beträgt.A compressor blade according to claim 6, characterized in that the untouched length (I 2 ) of the blade tip (7) is 50% to 80% of the axial chord length. Verdichterlaufschaufel nach Anspruch 9, dadurch gekennzeichnet, dass die unberührte Länge (I2) der Schaufelspitze (7) 60% bis 70% der axialen Sehnenlänge beträgt.A compressor blade according to claim 9, characterized in that the untouched length (I 2 ) of the blade tip (7) is 60% to 70% of the axial chord length. Verdichterlaufschaufel nach Anspruch 6, dadurch gekennzeichnet, dass die Tiefe der Aussparung (8) 10% bis 30%, vorzugsweise 10% bis 20%, der Höhe (H) der Schaufelhinterkante (6) beträgt.A compressor blade according to claim 6, characterized in that the depth of the recess (8) is 10% to 30%, preferably 10% to 20%, of the height (H) of the blade trailing edge (6). Verdichterlaufschaufel nach Anspruch 1, dadurch gekennzeichnet, dass die Schaufelspitze (7) des Schaufelblatts (2) austrittseitig eine Abschrägung (11) zur Schaufelhinterkante (6) hin aufweist.Compressor blade according to claim 1, characterized in that the blade tip (7) of the blade (2) on the outlet side has a chamfer (11) to the blade trailing edge (6) out. Verdichterlaufschaufel nach Anspruch 12, dadurch gekennzeichnet, dass die Aussparung (8) aus einer in einem Winkel (α) zur Schaufelhinterkante (6) angeordneten Geraden besteht, die in je einer Rundung mit einem Radius (R3) in die Schaufelspitze (7) bzw. in die Schaufelhinterkante (6) übergeht.A compressor blade according to claim 12, characterized in that the recess (8) consists of a straight line arranged at an angle (α) to the blade trailing edge (6), each of which is rounded in the blade tip (7) by a radius (R 3 ) into the blade trailing edge (6). Verdichterlaufschaufel nach Anspruch 12, dadurch gekennzeichnet, dass die unberührte Länge (I3) der Schaufelspitze (7) 50% bis 80% der axialen Sehnenlänge beträgt. A compressor blade according to claim 12, characterized in that the untouched length (I 3 ) of the blade tip (7) is 50% to 80% of the axial chord length. Verdichterlaufschaufel nach Anspruch 14, dadurch gekennzeichnet, dass die unberührte Länge (I3) der Schaufelspitze (7) 60% bis 70% der axialen Sehnenlänge beträgt.A compressor blade according to claim 14, characterized in that the untouched length (I 3 ) of the blade tip (7) is 60% to 70% of the axial chord length. Verdichterlaufschaufel nach Anspruch 12, dadurch gekennzeichnet, dass die Tiefe der Aussparung (8) 10% bis 30%, vorzugsweise 10% bis 20%, der Höhe (H) der Schaufelhinterkante (6) beträgt.A compressor blade according to claim 12, characterized in that the depth of the recess (8) is 10% to 30%, preferably 10% to 20%, of the height (H) of the blade trailing edge (6). Verdichterlaufschaufel nach Anspruch 12, dadurch gekennzeichnet, dass die Abschrägung (11) einen Winkel (α) von 20° bis 60° zur Hinterkante (6) der Verdichterlaufschaufel (1) einnimmt.A compressor blade according to claim 12, characterized in that the chamfer (11) occupies an angle (α) of 20 ° to 60 ° to the trailing edge (6) of the compressor blade (1). Verdichterschaufel nach Anspruch 17, dadurch gekennzeichnet, dass die Abschrägung (11) einen Winkel (α) von 30° bis 45° einnimmt.Compressor blade according to claim 17, characterized in that the chamfer (11) occupies an angle (α) of 30 ° to 45 °. Verdichterlaufschaufel (1) nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass die Verdichterlaufschaufel (1) kein Deckband aufweist.A compressor blade (1) according to any one of claims 1 to 18, characterized in that the compressor blade (1) has no shroud.
EP04105319A 2003-11-08 2004-10-27 Compressor rotor blade Withdrawn EP1529962A3 (en)

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US20050106030A1 (en) 2005-05-19
EP1529962A3 (en) 2008-03-05
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DE10352253A1 (en) 2005-06-09
US7351039B2 (en) 2008-04-01
CN1626772A (en) 2005-06-15

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