DE19726911A1 - Hollow scoops for turbines, compressors and pumps - Google Patents

Hollow scoops for turbines, compressors and pumps

Info

Publication number
DE19726911A1
DE19726911A1 DE1997126911 DE19726911A DE19726911A1 DE 19726911 A1 DE19726911 A1 DE 19726911A1 DE 1997126911 DE1997126911 DE 1997126911 DE 19726911 A DE19726911 A DE 19726911A DE 19726911 A1 DE19726911 A1 DE 19726911A1
Authority
DE
Germany
Prior art keywords
hollow
blades
blades according
hollow blades
foot
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Withdrawn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
DE1997126911
Other languages
German (de)
Inventor
Ernst Behm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1997126911 priority Critical patent/DE19726911A1/en
Publication of DE19726911A1 publication Critical patent/DE19726911A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
    • 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

Abstract

The hollow scoops have scoop blades with different or identical flow profiles in height, and are made from tubular elements or from pre-moulded sheet bowls. The bottom end of the scoops are welded to a projection or edging in the foot part of the same profile cross section. The top end is welded on directly and may be closed by an additional profile insert. The open sheet sides may be closed by welding. The foot may be moulded in one with the hollow body.

Description

Schaufeln für Turbinen, Verdichter oder Pumpen werden geschmiedet, gegossen oder auch aus geschweißten Halbschalen hergestellt. Ferner sind Schaufeln aus Einkristallen bekannt.Blades for turbines, compressors or pumps are forged, cast or also made from welded half shells. Furthermore, blades are made of single crystals known.

Aus Genauigkeitsgründen müssen häufig gegossene und geschmiedete Schaufel an der Oberfläche nachbearbeitet werden.For accuracy reasons, cast and forged shovel must be frequently on the Surface to be reworked.

Um aus Vollschaufeln hohle Schaufeln zu erzielen, müssen diese nachträglich mit großem Aufwand innen ausgehöhlt werden, z. Bspl. durch Errodieren.In order to achieve hollow blades from full blades, these have to be added later great effort to be hollowed out inside, e.g. Ex. by eroding.

Das Herstellverfahren oben genannter Schaufeltypen wird vielfach vom Werkstoff begrenzt oder führt in der Bearbeitung zu erheblichen Kosten.The manufacturing process of the aforementioned blade types is often dependent on the material limits or leads to considerable costs in processing.

Der Erfindung liegt die Aufgabe zugrunde, Hohlschaufeln kostengünstig ohne große Einschränkung des zu verwendenden Werkstoffes mit großer Wiederholgenauigkeit herzustellen.The invention has for its object, hollow blades inexpensively without large Restriction of the material to be used with great repeatability to manufacture.

Diese Aufgabe wird erfindungsgemäß durch die in den Ansprüchen genannten Merkmale gelöst und zwar wird ein Rohr, das ggf. abhängig von seiner Endform vorzuformen ist, in ein Werkzeug mit Unter- und Oberteil gelegt und durch Innendruck hydraulisch in die Form des Werkzeuges gedrückt. Je nach Formgebung der Schaufel können bis zur Endform mehrere Verformungsschritte mit Zwischenglühungen erforderlich sein.This object is achieved by the features mentioned in the claims a tube, which may need to be preformed depending on its final shape, placed in a tool with lower and upper part and hydraulically into the Form of the tool pressed. Depending on the shape of the blade, up to Finally, several deformation steps with intermediate annealing may be required.

Eine weitere Möglichkeit besteht in der Verformung von Blechschalen, die ebenfalls zwischen Werkzeuge gelegt und an den Rändern abgedichtet werden, bevor der Verformungsvorgang durch Druck erfolgt. Bei diesem Verfahren werden die Bleche nach der Verformung beschnitten und an den Ränder zusammengeschweißt und ggf. mechanisch geglättet.Another possibility is the deformation of sheet metal shells, which also placed between tools and sealed at the edges before the Deformation process is carried out by pressure. In this process, the sheets are the deformation is trimmed and welded together at the edges and if necessary mechanically smoothed.

Die Vorteile der Erfindung liegen darin, daß selbst komplizierte Schaufelformen durch einfache Verformungsschritte mit sehr hoher Wiederholgenauigkeit hergestellt werden können. Eine Einschränkung durch den Werkstoff ist nur bedingt gegeben.The advantages of the invention lie in the fact that even complicated blade shapes are possible simple deformation steps can be produced with very high repeatability can. There is only a limited restriction due to the material.

Ein weiterer Vorteil besteht darin, daß durch den Verformungsvorgang gleichzeitig unterschiedliche Fuß- bzw. Kopfformen angepreßt werden können, die mit speziellen Kopf- bzw. Fußteilen durch Schweißen verbunden werden.Another advantage is that the deformation process simultaneously different foot or head shapes can be pressed, which with special Head and foot sections are connected by welding.

Bei der Herstellung der Schaufelblätter aus Rohren können die Fußenden in die in die Werkzeuge gelegten Fußteile beim Umformvorgang mit eingepreßt werden. Das überstehende Rohr wird anschließend abgetrennt, das im Fußteil verbleibende mit diesem verschweißt.When manufacturing the shovel blades from pipes, the foot ends can be inserted into the Tools placed on the foot parts are pressed in during the forming process. The The protruding tube is then cut off, the remaining one in the base part welded this.

Normalerweise erfolgt der Umformvorgang im kalten Zustand. Werkzeuge und Umformelemente können jedoch auch zur besseren Verformung vorgewärmt werden. Als Hydraulikflüssigkeit wird in diesem Fall ein geeignetes Wärmeträgermedium eingesetzt.The forming process normally takes place in the cold state. Tools and Forming elements can, however, also be preheated for better deformation. As In this case, a suitable heat transfer medium is used for hydraulic fluid.

Die Oberflächenqualität wird durch die Ausgangsqualität der Rohrelemente bzw. Bleche vorgegeben. Da bei dem Verfahren keine Werkzeugabnutzung erfolgt, wird eine sehr hohe Wiederholgenauigkeit in der Herstellung der Elemente erreicht.The surface quality is determined by the initial quality of the pipe elements or sheets given. Since there is no tool wear in the process, one becomes very high repeatability in the manufacture of the elements achieved.

Claims (12)

1. Hohlschaufeln aus unterschiedlichen Metallen für Turbinen, Verdichter und Pumpen, dadurch gekennzeichnet, daß die Schaufelblätter in der Höhe gleichmäßige oder unterschiedliche Strömungsprofile aufweisen.1. Hollow blades made of different metals for turbines, compressors and pumps, characterized in that the blades have uniform or different flow profiles in height. 2. Hohlschaufeln nach Anspruch 1, dadurch gekennzeichnet, daß die Blätter aus Rohrelementen geformt werden.2. Hollow blades according to claim 1, characterized in that the blades made of tubular elements be shaped. 3. Hohlschaufeln nach Anspruch 1, dadurch gekennzeichnet, daß die Blätter aus vorgeformten Blechschalen geformt werden3. Hollow blades according to claim 1, characterized in that the blades are preformed Sheet metal trays are shaped 4. Hohlschaufeln nach Anspruch 1-3, dadurch gekennzeichnet, daß das untere Ende vornehmlich durch Schweißen mit einem im Fußteil ausgebildeten Überstand oder eingearbeiteter Einkerbung gleichen Profilquerschnitts verbunden wird.4. Hollow blades according to claims 1-3, characterized in that the lower end primarily by welding with a protrusion formed in the foot part or incorporated Notch of the same profile cross section is connected. 5. Hohlschaufeln nach Anspruch 1-3, dadurch gekennzeichnet, daß das obere Ende direkt zugeschweißt wird.5. Hollow blades according to claims 1-3, characterized in that the upper end is welded directly. 6. Hohlschaufeln nach Anspruch 1-3, dadurch gekennzeichnet, daß das obere Ende mit einem zusätzlichen Profileinsatz verschlossen wird.6. Hollow blades according to claims 1-3, characterized in that the upper end with a additional profile insert is closed. 7. Hohlschaufeln nach Anspruch 1 und 3, dadurch gekennzeichnet, daß die offene Blechseite durch Schweißen geschlossen wird.7. Hollow blades according to claim 1 and 3, characterized in that the open sheet metal side is closed by welding. 8. Hohlschaufeln nach Anspruch 1-2, dadurch gekennzeichnet, daß der Fuß als Hohlkörper mit angeformt wird.8. hollow blades according to claim 1-2, characterized in that the foot as a hollow body with is molded. 9. Hohlschaufeln nach Anspruch 1-3, dadurch gekennzeichnet, daß das untere Ende in einem zusätzlichen Hohlfuß eingepreßt wird.9. Hollow blades according to claims 1-3, characterized in that the lower end in one additional hollow foot is pressed. 10. Hohlschaufeln nach Anspruch 1-7, dadurch gekennzeichnet, daß die Schaufeln durch ein Innenprofil versteift werden.10. Hollow blades according to claims 1-7, characterized in that the blades by a Inner profile are stiffened. 11. Hohlschaufeln nach Anspruch 1-10, dadurch gekennzeichnet, daß im Innern der Schaufeln metallische Kühlkanäle oder Schikanen installiert werden.11. Hollow blades according to claims 1-10, characterized in that in the interior of the blades metallic cooling channels or baffles can be installed. 12. Hohlschaufeln nach Anspruch 1-9, dadurch gekennzeichnet, daß die Schaufeln durch ein Innenhochdruckverfahren geformt werden.12. Hollow blades according to claims 1-9, characterized in that the blades by a Internal high-pressure processes are shaped.
DE1997126911 1997-06-25 1997-06-25 Hollow scoops for turbines, compressors and pumps Withdrawn DE19726911A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997126911 DE19726911A1 (en) 1997-06-25 1997-06-25 Hollow scoops for turbines, compressors and pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997126911 DE19726911A1 (en) 1997-06-25 1997-06-25 Hollow scoops for turbines, compressors and pumps

Publications (1)

Publication Number Publication Date
DE19726911A1 true DE19726911A1 (en) 1999-01-07

Family

ID=7833568

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997126911 Withdrawn DE19726911A1 (en) 1997-06-25 1997-06-25 Hollow scoops for turbines, compressors and pumps

Country Status (1)

Country Link
DE (1) DE19726911A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959598A1 (en) * 1999-12-10 2001-06-13 Rolls Royce Deutschland Method for manufacturing a blade of a turbomachine
EP2113358A1 (en) * 2008-04-30 2009-11-04 Rolls-Royce Deutschland Ltd & Co KG Lead rotors of a lead rotor grid of a flight gas turbine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959598A1 (en) * 1999-12-10 2001-06-13 Rolls Royce Deutschland Method for manufacturing a blade of a turbomachine
US6532658B2 (en) 1999-12-10 2003-03-18 Rolls-Royce Deutschland Ltd. & Co Kg Process for the manufacture of a blade/vane of a turbomachine
EP2113358A1 (en) * 2008-04-30 2009-11-04 Rolls-Royce Deutschland Ltd & Co KG Lead rotors of a lead rotor grid of a flight gas turbine
DE102008021684A1 (en) * 2008-04-30 2009-11-05 Rolls-Royce Deutschland Ltd & Co Kg Guide vanes of a vane grille of an aircraft gas turbine
US8221087B2 (en) 2008-04-30 2012-07-17 Rolls-Royce Deutschland Ltd & Co Kg Stator vanes of a stator vane cascade of an aircraft gas turbine

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