EP3908737A1 - Laufschaufel für eine thermische rotationsmaschine sowie verfahren zum herstellen einer solchen laufschaufel - Google Patents
Laufschaufel für eine thermische rotationsmaschine sowie verfahren zum herstellen einer solchen laufschaufelInfo
- Publication number
- EP3908737A1 EP3908737A1 EP20706955.0A EP20706955A EP3908737A1 EP 3908737 A1 EP3908737 A1 EP 3908737A1 EP 20706955 A EP20706955 A EP 20706955A EP 3908737 A1 EP3908737 A1 EP 3908737A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- rotor blade
- rotor
- area
- producing
- 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- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 241001016380 Reseda luteola Species 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 15
- 230000003628 erosive effect Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 5
- 239000011265 semifinished product Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/04—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from several pieces
-
- 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
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on 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
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
-
- 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
-
- 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
- F05D2260/94—Functionality given by mechanical stress related aspects such as low cycle fatigue [LCF] of high cycle fatigue [HCF]
Definitions
- the invention relates to a rotor blade for a thermal rotary machine according to the preamble of the independent patent claim 1 and to a method for producing a rotor blade according to the preamble of the independent method claim 7.
- Rotating blades for thermal rotating machines such as steam or gas turbines
- the moving blades can only be made with high-strength materials or, ultimately, no longer at all.
- Blades for different speeds can be compared with each other by the quantity A ⁇ n 2 , where A represents the swept area and n the speed.
- rotor blades are usually made in one piece, for example from forgings or semi-finished products.
- the rotor blades have a blade root with which they are inserted into a rotor groove formed in the rotor in order to form a row of blades.
- Each blade can be inserted into its own axial groove or all blades of a blade row can be inserted into a common circumferential groove.
- the most highly stressed areas of the blade are the blade root and the transition from the blade root to the
- the stress on the blade root area and the blade area act as a combination of LCF Low Cycle Fatigue (LCF) and High Cycle Fatigue (HCF), which result from the start-stop load cycles (LCF) and vibration excitations (HCF). Due to the high centrifugal forces of the rotor blade, strong contact loads continue to act in the rotor slots at the blade root. For large blades, centrifugal forces can be up to 100 t per blade.
- the object is achieved by the features of independent patent claim 1.
- the object is achieved by the features of the independent patent claim 7.
- the blade blade area is formed with the blade root area by assembling one or more prefabricated components.
- the blade root area which is exposed to high contact stresses and high tensile stresses on the blade area, is preferably made of a high-strength, weldable material. In this way, high levels of stress are achieved, which has an advantageous effect on the executable blade length and / or on the permissible number of starts (LCF stress).
- the prefabricated components are assembled by welding.
- welding the components it is possible to combine materials with different properties in an advantageous manner.
- a high-strength blade root area can be combined with an erosion-resistant blade area, or (because it is less stressed) a less high-strength blade area.
- the blade area can also be made of several (optionally) different materials.
- the blade area can be protected in the area of the blade edges by an erosion protection measure. All known welding processes can be used for welding.
- the weld roots of the weld seams are arranged near the neutral fiber of the rotor blades with regard to their main bending moments.
- the inner contour of the rotor blade in the weld area can be designed in such a way that the weld seam root is spatially closer to the neutral fiber.
- the bending moments linked to the main eigenmodes are to be considered as the main bending moments.
- a cross-section should preferably be formed. The spatial arrangement of the weld root near the neutral fiber improves the HCF- Stress clearly.
- the stress at the weld seam root is not relevant and does not constitute a strength restriction.
- the weld seam is also positioned here in such a way that shear stresses and main eigenmodes can be tolerated well, ie. H. that the weld root is in turn arranged near the neutral fiber.
- a further embodiment of the invention provides that the cavity / cavities are formed in the blade area. Due to the formation of the cavity or the cavities of the blade area, the center of gravity of the rotor blade is moved closer to the axis of rotation of the rotor, whereby the centrifugal force can be reduced more than it would result in the same saving of mass, which is closer to the rotor axis.
- Another embodiment of the invention provides that the cavity / cavities are formed in the blade area and in the blade root area. Because cavities are also formed in the blade root area, the total mass of the rotor blade can be further reduced, which means that even lower rotor blade masses can be achieved and the centrifugal force load can be further optimized with this. As a result, even greater blade lengths can be achieved without the permissible loads, in particular LCF and HCF loads, being exceeded.
- the geometry of the later inner and outer contour can optionally be checked with a 3D measuring process and the components can be post-treated if necessary.
- Another advantage of the assembly or of the method according to the invention is that the surfaces of the subsequent cavity are accessible and can be processed during assembly. As a result, high-quality surfaces (higher HCF / LCF resistance) and / or more precise wall thicknesses and geometric properties (load-bearing cross-sections, imbalance or centrifugal force contribution) can be achieved. As a result, an inner contour with a fixed geometry and optionally a machined surface is achieved.
- prefabricated components made of different materials with different properties can be combined, for example a high-strength foot area can be combined with an erosion-resistant blade area, which is not possible with conventional rotor blades that are made in one piece, for example from forgings or semi-finished products .
- An embodiment of the method according to the invention is characterized in that after the assembly of the guide vane, a 3D measurement and recording of the blade profile is carried out and a simulation is then carried out on the basis of the recorded blade profile, by means of which it is checked whether previously specified properties, in particular visually Wall thicknesses, blade geometry, blade position, blade weights and natural frequencies are adhered to. In this way, errors that would lead to damage to the thermal rotary machine during operation can already be excluded during manufacture.
- the 3D measurement can measure the entire rotor blade profile or just the flow profile of the blade area.
- Another embodiment of the method according to the invention provides that if one or more specified properties are not adhered to based on the recorded blade profile a machining geometry for the outer contour of the blade profile is determined and formed in which all fixed properties, in particular with regard to wall thickness, blade geometry, blade position, blade masses and eigenfrequen zen are maintained.
- a machining geometry for the outer contour of the blade profile is determined and formed in which all fixed properties, in particular with regard to wall thickness, blade geometry, blade position, blade masses and eigenfrequen zen are maintained.
- a rotor blade with reduced mass can thus be produced with a defined, highly stressable inner contour which, despite the integral (welding) assembly, meets the requirements for large rotor blades.
- FIG. 3 shows the rotor blade according to the invention shown in FIG. 2 along the section line A-A;
- the rotor blade 1 shows a rotor blade 1 according to the prior art.
- the rotor blade is made in one piece, for example from a forged piece or a semi-finished product.
- the blade 1 comprises a blade area 3 designed in the form of a flow profile 2 and a blade area 3 designed for fastening the blade 1 to a rotor,
- Blade root area 4 Due to the massive one-piece training from the blade 1, high centrifugal forces act during operation of the thermal rotary machine. In particular with large blade lengths and / or high speeds, the moving blades can only be steepened with high-strength and therefore expensive materials or, ultimately, not at all.
- the most heavily stressed areas of the rotor blade 1 are the blade root area 4 and the transition to the blade area 3.
- the blade area 3 itself is also highly stressed in large parts of its extent.
- the stress on the blade root and blade act as a combination of LCF and HCF stress, which result from the start-stop load cycles (LCF) and the vibration excitations (HCF). Because of the existing strength limits of today's materials, only blades 1 of a certain size can be built.
- FIG. 2 shows a rotor blade 1 according to the invention for a thermal rotary machine.
- the rotor blade 1 in turn comprises a blade area 3 that forms a flow profile 2, as well as a blade root area 4 designed to attach the rotor blade 1 to a rotor.
- the rotor blade 1 in the exemplary embodiment consists of a series of prefabricated components 5, 6, 7 assembled.
- the blade 1 has a cavity 8 which is delimited by inner surfaces 9 of the three components 5, 6, 7 of the blades 1.
- the cavity 8 only extends in the blade area 3. In principle, it would also be bar to form the cavity 8 both in the blade area 3 and in the blade root area 4.
- the formation of several cavities is also conceivable.
- the hollow spaces 8 lead to a reduction in the mass of the rotor blade 1, whereby the centrifugal stress on the rotor blade 1 is redu ed.
- the blade area 3 is joined to the blade root area 4 by assembling several prefabricated components together.
- the advantage of the assembly is that the surface 9 of the cavity is still accessible during the joining and can thus be processed and / or measured.
- high-quality surfaces 9, higher HCF / LCF load capacities and / or more precise wall thickness and geometry properties can be achieved.
- An inner contour of fixed geometry and optionally machined surfaces is thus achieved.
- the rotor blade 1 shown in the exemplary embodiment is assembled by welding.
- FIG. 3 shows the rotor blade 1 shown in FIG.
- the flow profile 2 of the rotor blade 1 has a pressure side 2 'and a suction side 2' '. In order to achieve the required load capacity of the weld seam, it is positioned in such a way that the root area is close to a stress-reduced area when the force flows across the weld seam.
- FIG. 4 shows the rotor blade 1 known from FIG. 2 in a sectional illustration along the section line B-B. It can be seen from the illustration that the airfoil area 3 is assembled from several prefabricated components 5, 6, 7. Welding makes it possible to combine materials with different properties. For example, a high-strength foot area can be combined with a less high-strength blade area. The sheet area can also be joined from several optionally different materials, as shown in FIG. As can be seen in FIG. 4, the inner contour of the rotor blade 1 in the area of the weld seam 10 is designed in such a way that the weld seam root of the weld seams 10 is spatially closer to the neutral fiber 11; for this purpose, the wall thickness in the inner area has been thickened .
- the erosion protection measure 12 achieves a high level of resistance to erosion, which is particularly necessary in the case of steam turbines and here in the low-pressure range, since droplets often form from the steam here, which hit the rotor blade 1 at high speed. and regularly lead to erosion damage to the rotor blade 1.
- the rotor blades shown in the two exemplary embodiments are produced essentially by pre-manufacturing the required components 5, 6, 7 with a given inner and outer contour and then assembling the individual prefabricated components 5, 6, 7 into the finished rotor blade 1.
- the surfaces of the later cavity 8 remain accessible during the assembly and can thus be edited and / or measured.
- the external and internal contours can optionally be measured using a 3D measurement process.
- a measurement of the generated geometry and a possible distortion due to the assembly can take place.
- the warpage can be assessed, for example, by means of a simulation (e.g. FEM).
- suitable machining geometries can be defined for the outer contour and, if necessary, also for the inner contour, so that despite a distortion, wall thickness, blade geometry, blade position, blade dimensions - and natural frequency requirements are met. As a result, a scrap of the blade 1 can be avoided in many cases, resulting in significant cost savings.
- the method according to the invention can produce a mass-reduced rotor blade with a defined, highly stressable, inner contour which, despite the integral / welded assembly, meets the requirements for large rotor blades.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019202054.2A DE102019202054A1 (de) | 2019-02-15 | 2019-02-15 | Laufschaufel für eine thermische Rotationsmaschine sowie Verfahren zum Herstellen einer solchen Laufschaufel |
| PCT/EP2020/053334 WO2020165096A1 (de) | 2019-02-15 | 2020-02-10 | Laufschaufel für eine thermische rotationsmaschine sowie verfahren zum herstellen einer solchen laufschaufel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3908737A1 true EP3908737A1 (de) | 2021-11-17 |
Family
ID=69699828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20706955.0A Withdrawn EP3908737A1 (de) | 2019-02-15 | 2020-02-10 | Laufschaufel für eine thermische rotationsmaschine sowie verfahren zum herstellen einer solchen laufschaufel |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3908737A1 (de) |
| CN (1) | CN113518849A (de) |
| BR (1) | BR112021015937A2 (de) |
| DE (1) | DE102019202054A1 (de) |
| WO (1) | WO2020165096A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788596B (zh) * | 2022-10-24 | 2024-02-23 | 衡水中裕铁信装备工程有限公司 | 减小锻压扭矩抗力的动叶片、动叶片模具及模具设计方法 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB603044A (en) * | 1945-02-22 | 1948-06-08 | Svenska Turbinfab Ab | Improvements in moving blades for radial flow elastic fluid turbines or compressors |
| DE4223483C2 (de) * | 1992-07-14 | 1997-12-11 | Thyssen Industrie | Verfahren zur Bestimmung der Form- und Lageabweichungen von Fertigungsteilen |
| CA2307471A1 (en) * | 1997-10-27 | 1999-05-06 | Siemens Westinghouse Power Corporation | Method of bonding cast superalloys |
| DE19858702B4 (de) * | 1998-12-18 | 2004-07-01 | Mtu Aero Engines Gmbh | Verfahren zum Verbinden von Schaufelteilen einer Gasturbine, sowie Schaufel und Rotor für eine Gasturbine |
| FR2852999B1 (fr) * | 2003-03-28 | 2007-03-23 | Snecma Moteurs | Aube allegee de turbomachine et son procede de fabrication |
| FR2855439B1 (fr) * | 2003-05-27 | 2006-07-14 | Snecma Moteurs | Procede de fabrication d'une aube creuse pour turbomachine. |
| EP1489264A1 (de) * | 2003-06-18 | 2004-12-22 | Siemens Aktiengesellschaft | Modular aufgebaute Schaufel |
| CN1587649A (zh) * | 2004-07-28 | 2005-03-02 | 斯奈克玛马达公司 | 用于涡轮发动机的中空叶片的制造方法 |
| US20070003415A1 (en) * | 2005-06-30 | 2007-01-04 | Spx Corporation | Mixing impeller and method with weld locations |
| DE102006033298A1 (de) * | 2006-07-17 | 2008-01-24 | Rolls-Royce Deutschland Ltd & Co Kg | Verfahren zur Herstellung oder Reparatur von als BLISK ausgeführten Verdichtern für ein Gasturbinentriebwerk |
| ITTV20130029A1 (it) * | 2013-02-28 | 2014-08-29 | Pietro Rosa T B M S R L | Paletta per turbomacchine e relativo metodo di costruzione |
| EP3023191A1 (de) * | 2014-11-20 | 2016-05-25 | Siemens Aktiengesellschaft | Turbinenschaufel hergestellt aus zwei teilen |
| GB201707101D0 (en) * | 2017-05-04 | 2017-06-21 | Rolls Royce Plc | Vane arrangement for a gas turbine engine |
-
2019
- 2019-02-15 DE DE102019202054.2A patent/DE102019202054A1/de not_active Ceased
-
2020
- 2020-02-10 WO PCT/EP2020/053334 patent/WO2020165096A1/de not_active Ceased
- 2020-02-10 EP EP20706955.0A patent/EP3908737A1/de not_active Withdrawn
- 2020-02-10 CN CN202080014750.8A patent/CN113518849A/zh active Pending
- 2020-02-10 BR BR112021015937-1A patent/BR112021015937A2/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019202054A1 (de) | 2020-08-20 |
| CN113518849A (zh) | 2021-10-19 |
| BR112021015937A2 (pt) | 2021-10-05 |
| WO2020165096A1 (de) | 2020-08-20 |
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