EP1761361A1 - Method and device for surface blasting gas turbine blades in the area of the roots thereof - Google Patents
Method and device for surface blasting gas turbine blades in the area of the roots thereofInfo
- Publication number
- EP1761361A1 EP1761361A1 EP05753780A EP05753780A EP1761361A1 EP 1761361 A1 EP1761361 A1 EP 1761361A1 EP 05753780 A EP05753780 A EP 05753780A EP 05753780 A EP05753780 A EP 05753780A EP 1761361 A1 EP1761361 A1 EP 1761361A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas turbine
- blade
- vibrator
- shot peening
- vibrating surface
- 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
- 238000005422 blasting Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005480 shot peening Methods 0.000 claims abstract description 40
- 238000012545 processing Methods 0.000 claims abstract description 31
- 238000002604 ultrasonography Methods 0.000 claims description 16
- 238000003754 machining Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
- B24B39/006—Peening and tools therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/47—Burnishing
- Y10T29/479—Burnishing by shot peening or blasting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
- Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
- Y10T29/49323—Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
- Y10T29/49325—Shaping integrally bladed rotor
Definitions
- the invention relates to a method for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the area of their blade roots according to the preamble of claim 1. Furthermore, the invention relates to a device for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the area of their blade feet according to the preamble of claim 8.
- Gas turbines in particular aircraft engines, have, in particular in the area of their compressor and their turbine, at least one rotor equipped with rotating rotor blades, the rotating rotor blades of the gas turbine being anchored in profiled blade roots in corresponding recesses in the gas turbine rotor.
- it is possible to profile the blade feet either according to the so-called fir tree design (fir tree design) or according to the so-called dovetail design (dove tail design) and to anchor them in correspondingly profiled recesses in the gas turbine rotor.
- the preferably fir tree-profiled or dovetail-profiled surfaces of a blade root of a gas turbine blade are also referred to as wings.
- the blade feet on their profiled wings are particularly stressed by friction wear.
- the rate of wear in the area of the blade feet can be reduced in that the blade feet are solidified on their wings by special surface processing methods. Shot peening is preferably used here. In conventional shot peening, considerable surface roughening can occur on the wings of the blade feet, which adversely affects the accuracy of fit of the blade feet.
- the gas turbine blades to be machined are oriented upright such that the profiled airfoils of the blade roots to be machined run essentially perpendicular to the vibrating surface of the ultrasound sonotrode. This can only achieve insufficient quality when shot peening the profiled wings of the blade feet.
- the present invention is based on the problem of creating a novel method and a novel device for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the region of their blade roots.
- the or each gas turbine blade for surface blasting is aligned in such a way that during surface blasting, at least one profiled support surface of the or each blade root to be machined runs at least at times essentially parallel to a vibrating surface of the or each vibrator, in particular the or each ultrasonic sonotrode, wherein the vibrating surface of the or each vibrator is oriented substantially in the horizontal or horizontal direction.
- the gas turbine blades or the blade roots thereof for surface blasting in particular for ultrasonic shot peening, in such a way that at least one wing surface of the blade feet, preferably fir-tree-profiled or dovetail-profiled, is essentially parallel to that in the horizontal direction running, vibrating surface of the vibrator is aligned.
- the gas turbine blades are therefore not positioned in a processing chamber as in the prior art, but rather in a lying position. In this way, the processing quality for surface blasting of the wings can be significantly improved compared to the prior art.
- the or each gas turbine blade is blasted by a substantially rotated parallel to the vibrating surface of the or each vibrator, in particular the or each ultrasonic sonotrode.
- FIG. 1 shows a highly schematic representation of a device according to the invention for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the region of their blade roots according to a first exemplary embodiment of the invention
- 2 shows a highly schematic representation of a device according to the invention for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the region of their blade roots according to a second exemplary embodiment of the invention
- 3 shows a highly schematic representation of a device according to the invention for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the region of their blade roots according to a third exemplary embodiment of the invention
- 4 shows a highly schematic illustration of a device according to the invention for surface blasting, in particular for ultrasonic shot peening, of gas turbine blades in the region of their blade roots according to a further exemplary embodiment of the invention
- FIG. 5 shows a view of the device of FIG. 4 in viewing direction V according to FIG. 4th
- Fig. 1 shows highly schematically an inventive device 10 commended for ultrasonic Kugelstr 'of gas turbine blades in the area of their blade roots, along with a gas turbine blade 11.
- the device 10 has a formed as an ultrasonic horn 12 vibrating with a substantially in the horizontal direction or a horizontal direction, vibrating or vibrating surface 13.
- a processing chamber 14 Above the vibrating surface 13 of the ultrasonic sonotrode 12, a processing chamber 14 is positioned, a gas turbine blade 11 with its blade root 15 being arranged in the processing chamber 14 according to FIG. 1.
- the gas turbine blade 11 to be machined in the region of the blade root 15 projects with its blade 16 out of the processing chamber 14.
- the processing chamber is delimited on its underside by the vibrating surface 13 of the ultrasound sonotrode 12, laterally and at the top by corresponding covers 17, 18 and 19, respectively.
- a plurality of balls are positioned within the processing chamber 14, which are different from the vibrating one Surface 13 of the ultrasonic sonotrode is accelerated and directed onto the blade root 15 of the gas turbine blade 11 to be machined. Under the influence of gravity, the balls return to the area of the vibrating surface 13 in order to then be accelerated or moved again in the direction of the blade root 15 to be machined.
- the gas turbine blade 11 positioned with the blade root 15 in the processing chamber 14 is aligned for ultrasonic shot peening in such a way that when blasting, at least one profiled support surface of the blade root 15 of the gas turbine blade 11 to be machined is parallel to the horizontal or horizontal one , vibrating surface 13 of the ultrasound sonotrode 12 is aligned.
- the gas turbine blade 11 accordingly lies within the processing chamber 14 in such a way that an axis extending from the radially inner end of the blade root 15 in the direction of a radially outer end of the blade blade 16 does not run vertically or vertically, in contrast to the prior art according to US Pat. No. 6,536,109 B2 but rather horizontally or horizontally.
- the balls accelerated via the ultrasound sonotrode give their momentum directly to the wings of the blade root to be solidified.
- high depths of consolidation and residual compressive stresses can be achieved on the wings of the blade root. Accordingly, there is a direct solidification of the wing surfaces of the blade feet to be blasted. Shorter processing times or blasting times can be realized than in the prior art.
- the Balls are not directed in a preferred direction at the wings of the blade root 15 to be machined, but rather at different angles. This results in an efficient hardening on the wing surfaces of the blade feet.
- FIG. 2 shows an embodiment of a device 20 according to the invention for shot peening gas turbine blades in the region of their blade roots, two gas turbine blades 11 with their blade feet 15 in the sense of the present invention for ultrasonic shot peening in the processing chamber 14 of the device 20 in the embodiment of FIG. 2 are positioned or aligned in such a way that, when blasting, the wing surface of the blade feet 15 to be blasted runs essentially parallel to the oscillating surface 13 of the ultrasound sonotrode 12.
- the device in FIG. 2 corresponds to the device in FIG. 1, so that the same reference numbers are used for the same assemblies.
- FIG. 3 shows a further exemplary embodiment of a device 21 according to the invention for shot peening of gas turbine blades in the region of their blade roots, the same reference numerals also being used in connection with the exemplary embodiment in FIG. 3 to avoid unnecessary repetitions for identical assemblies.
- the exemplary embodiment of FIG. 3 differs from the exemplary embodiment of FIG. 1 essentially in that the gas turbine blade 11 shown is oriented within the processing chamber 14 during shot peening in relation to the oscillating surface 13 of the ultrasonic sonotrode 12 such that a tangent to projections is one of the the swinging surface 13 opposite wing of the blade root 15 is substantially parallel to the vibrating surface 13 and thus substantially in the horizontal direction.
- the device 21 according to the invention has a device 22 for tilting or pivoting the gas turbine blade
- axis 12 extending and thus running in the horizontal direction axis can be rotated. Essentially rotating the blade feet around them The axis running in the horizontal direction can be carried out either continuously or intermittently or discontinuously during shot peening. This ensures that all wings to be blasted are blasted evenly through the balls accelerated via the ultrasound sonotrode 12.
- FIGS. 4 and 5 show a further exemplary embodiment of a device 23 according to the invention for shot peening gas turbine blades in the region of their blade roots, the device 23 according to FIGS. 4 and 5 in turn via an ultrasound sonotrode 24 with a substantially horizontal or horizontal direction extending, vibrating surface 25 has.
- a processing chamber 26 is again positioned above the oscillating surface 25 of the ultrasound sonotrode 24, which is shown in a highly schematic manner in FIG. 5.
- two gas turbine blades 11 are blasted in the region of their blade roots 15, the gas turbine blades 11 in turn being oriented for ultrasonic shot peening in such a way that at least one wing to be machined, in particular a fir tree profiled or dovetail profile, is blasted the blade feet 15 runs at least temporarily essentially parallel to the vibrating surface 25 of the ultrasound sonotrode 24, which extends in the horizontal direction.
- the device 23 has a revolver-like rotatable carrier 27 which can be rotated about an axis 29 in the direction of the arrow 28.
- a plurality of turntables 30 are arranged for receiving gas turbine blades 11. All the turntables 30 can be rotated jointly in the direction of the arrow 28 about the axis 29, on the other hand each of the turntables 30 can be rotated individually in the direction of an arrow 31, namely when the corresponding turntable 30 is used to process the gas turbine blades 11 positioned on the turntable 30 located in the processing chamber 26 and thus the ultrasound sonotrode 24.
- a turntable 30 By rotating the revolver-like carrier 27 in the direction of arrow 28, a turntable 30 can therefore always be moved into and out of the processing station 26 together with the gas turbine blades 11 positioned on the turntable 30.
- the corresponding turntable 30 can be rotated in the direction of the arrow 31 in order to ensure a uniform blasting of all the wings of the blade feet 15 of the gas turbine blades 11.
- All of the exemplary embodiments have in common that for ultrasonic shot peening of gas turbine blades 11 in the area of their blade roots 15, they are aligned relative to an oscillating surface 13 of an ultrasound sonotrode 12 which runs essentially in the horizontal direction in such a way that the to be emitted, in particular fir tree profiled or dovetail profiled wings of the blade feet 15 are aligned parallel to the vibrating surface 13.
- the gas turbine blades 11 are therefore not oriented upright within the processing chamber, but rather lying with a horizontally extending longitudinal axis which extends between the radially inner end of the blade root and the radially outer end of the blade of the gas turbine blades.
- the gas turbine blades can be rotated about this longitudinal axis during shot peening.
- the devices according to the invention always comprise only one sonotrode, which is arranged below the processing chamber. It should be pointed out that, of course, a plurality of sonotrodes can also be arranged in the region of a processing chamber 26, in which case one sonotrode or a vibrating surface of the sonotrodes is preferably arranged below and another above the processing chamber.
- an optimized depth of hardening and an increased residual compressive stress in ultrasonic shot peening can be achieved. This is achieved by the alignment of the blade feet according to the invention during ultrasonic shot peening.
- the quality of the blasted surface can be further improved by rotating or rotating the blade feet during ultrasonic shot peening.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004029546A DE102004029546A1 (en) | 2004-06-19 | 2004-06-19 | Method and apparatus for surface blasting gas turbine blades in the area of their blade roots |
PCT/DE2005/001022 WO2005123338A1 (en) | 2004-06-19 | 2005-06-08 | Method and device for surface blasting gas turbine blades in the area of the roots thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1761361A1 true EP1761361A1 (en) | 2007-03-14 |
EP1761361B1 EP1761361B1 (en) | 2007-11-28 |
Family
ID=34971288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05753780A Active EP1761361B1 (en) | 2004-06-19 | 2005-06-08 | Method and device for surface blasting gas turbine blades in the area of the roots thereof |
Country Status (4)
Country | Link |
---|---|
US (1) | US7481088B2 (en) |
EP (1) | EP1761361B1 (en) |
DE (2) | DE102004029546A1 (en) |
WO (1) | WO2005123338A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104039507A (en) * | 2012-01-17 | 2014-09-10 | 联合工艺公司 | Method of surface treatment for dovetail in gas turbine engine fan blade |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004037954A1 (en) * | 2004-08-05 | 2006-03-16 | Mtu Aero Engines Gmbh | Device for surface blasting of components |
DE102004059592B4 (en) * | 2004-12-10 | 2014-09-04 | MTU Aero Engines AG | Method for surface blasting of cavities, in particular of cavities on gas turbines |
US7805972B2 (en) * | 2005-10-12 | 2010-10-05 | Surface Technology Holdings Ltd. | Integrally bladed rotating turbo machinery and method and apparatus for achieving the same |
DE102006008210A1 (en) | 2006-02-22 | 2007-08-23 | Mtu Aero Engines Gmbh | Shot-peening chamber for ultrasonic shot peening of especially gas turbine components has facility wherein for changing geometry of the chamber at least one wall section is adjustable by means of inflation or filling with gas |
US7665338B2 (en) * | 2006-10-20 | 2010-02-23 | Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces | Shot peening methods and units |
DE102006058679A1 (en) | 2006-12-13 | 2008-06-19 | Mtu Aero Engines Gmbh | Device and method for surface blasting of a component of a gas turbine |
FR2930184B1 (en) * | 2008-04-18 | 2010-12-31 | Snecma | PROCESS FOR ULTRASONIC CRUSHING OF TURBOMACHINE PARTS. |
JP5920221B2 (en) * | 2010-11-12 | 2016-05-18 | 日本精工株式会社 | Actuator manufacturing method |
CN109517955A (en) * | 2018-11-16 | 2019-03-26 | 上海蜂云航空科技有限公司 | It is a kind of for improving the method and apparatus of engine nozzle jet stream orifice thermal stability |
CN117140370B (en) * | 2023-10-27 | 2024-01-02 | 中北大学 | Six-degree-of-freedom double-frequency ultrasonic cavitation shot blasting device with special fixture |
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FR2816538B1 (en) | 2000-11-16 | 2003-01-17 | Snecma Moteurs | PROCESS FOR INCREASING THE LIFETIME OF AUB ATTACHES ON A ROTOR |
FR2816536B1 (en) | 2000-11-16 | 2003-01-17 | Snecma Moteurs | METHOD AND DEVICE FOR ULTRASONIC SCRATCHING OF "AXIAL" ATTACHMENT ALVEOLS OF AUBES ON A ROTOR |
FR2816636B1 (en) * | 2000-11-16 | 2003-07-18 | Snecma Moteurs | SHOT BLASTING OF COOLED DAWN TOP |
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-
2004
- 2004-06-19 DE DE102004029546A patent/DE102004029546A1/en not_active Withdrawn
-
2005
- 2005-06-08 WO PCT/DE2005/001022 patent/WO2005123338A1/en active IP Right Grant
- 2005-06-08 EP EP05753780A patent/EP1761361B1/en active Active
- 2005-06-08 US US11/630,052 patent/US7481088B2/en active Active
- 2005-06-08 DE DE502005002115T patent/DE502005002115D1/en active Active
Non-Patent Citations (1)
Title |
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See references of WO2005123338A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104039507A (en) * | 2012-01-17 | 2014-09-10 | 联合工艺公司 | Method of surface treatment for dovetail in gas turbine engine fan blade |
Also Published As
Publication number | Publication date |
---|---|
EP1761361B1 (en) | 2007-11-28 |
DE102004029546A1 (en) | 2006-01-05 |
WO2005123338A1 (en) | 2005-12-29 |
US20070214640A1 (en) | 2007-09-20 |
DE502005002115D1 (en) | 2008-01-10 |
US7481088B2 (en) | 2009-01-27 |
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