DE873553C - Attachment for axially loaded turbine blades to the wheel disc by welded seams - Google Patents

Attachment for axially loaded turbine blades to the wheel disc by welded seams

Info

Publication number
DE873553C
DE873553C DED2991D DED0002991D DE873553C DE 873553 C DE873553 C DE 873553C DE D2991 D DED2991 D DE D2991D DE D0002991 D DED0002991 D DE D0002991D DE 873553 C DE873553 C DE 873553C
Authority
DE
Germany
Prior art keywords
wheel disc
axially loaded
attachment
turbine blades
splayfoot
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.)
Expired
Application number
DED2991D
Other languages
German (de)
Inventor
Heinrich Dipl-Ing Boehm
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.)
Weser AG
Original Assignee
Weser 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 Weser AG filed Critical Weser AG
Priority to DED2991D priority Critical patent/DE873553C/en
Application granted granted Critical
Publication of DE873553C publication Critical patent/DE873553C/en
Expired legal-status Critical Current

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
    • F01D5/3061—Fixing blades to rotors; Blade roots ; Blade spacers by welding, brazing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

Es ist bekannt; Turbinenscliäüfeln mit der Rad- scheibe zu verschweißen. Zur Sicherung der richtigen Lage der Schaufeln zur Radscheibe während des Schweißvorgangs sind umständliche! Hailtevorrich- tungen erforderlich, welche die Schweißumg -und den-stetigen Verlauf der Schweißarbeit stören. Es sind Vereinigungen aus mechanischer Ve7r- bindung und Schweißverbindung zur Befestigung von Turbinenschaufeln bekannt. Blei diesen wird beim Ziehen der Schweißnaht der Schaufelsitz durch Wärmeübergang nachteilig beeinf fußt. Um diese Schwierigkeiten zu vermeiden, ist gemäß der Erfindung eine von den Schweißnähten durch mindestens einen Ringraum getrennte Hilfs- verbindung vorgesehen, die zwecks, Festlegung der Schaufeln während des Schweißens mit ent- sprechenden Gegenführungen der Radscheibe in Eingriff gebracht wird. Ein hinreichenider Festsitz beider Führungen ineinander wird erfindungs- gemäß entweder durch Keilwirkung oder durch Materiä,lverfo@rmüng erzielt. Die so. mit der Rad- scheibe verbundenen Schaufeln können ohne be- sondere Hilfsvorrichtungen verschweißt werden, Die Zeichnung zeigt ein Aus@führungsbeispiel in Fig. i und 2) im Schnitt. ' In Fig. z sind ain Umfang der Radscheibe d zwei eine konische Ringnut f begrenzende Füh- rungen g, g vorgesehen, die gegen die Seitenfläche der Radscheibe d zurückspringen und von den Schweißstehlen i durch Ringfugen h getrennt sind. Ferner befindet sich zwischen den Führungen g eine Keilfläche n. Der entsprechende Führungsteil der Schaufel a (Fig. 2) besteht aus einem Spreiz- fuß m. Beim Aufsetzen der Schaufel auf die Rad- scheibe wird der Schaufelfuß m durch die Keil- fläche gespreizt bzw. entsprechend verformt und dadurch festgeklemmt. Die .Seiten@fülirungen g, g verhindern dabei ein seitliches Ausweichen der Schaufel beim. Aufpressen. Die Seitenränder von Schaufeln und Radscheibe kommen genau an den Schweißstellen, aufe@Inanderzuliegen. Diel Ring- fugen h stören die Wärmeübertragung während des Schweißvorgangs und verhindern so eine Beein- flussung des Schaufelsitzes durch die Schweiß- wärme. Der Keil n kann entweder unabhängig in einzelnen Stücken eingebracht oder als Ringkeil aus dem Scheibenmaterial herausgearbeitet sein.. It is known; Turbine clamps with the wheel washer to be welded. To ensure the correct Position of the blades in relation to the wheel disc during the Welding processes are cumbersome! Rail fixture required which the welding environment and disturb the steady progress of the welding work. They are associations made up of mechanical bond and welded joint for fastening known from turbine blades. Lead this will when pulling the weld seam, the blade seat adversely affected by heat transfer. Around avoiding these difficulties is appropriate the invention one of the welds through at least one annulus separated auxiliary connection provided for the purpose of establishing the Blades during welding with speaking mating guides of the wheel disc in Intervention is brought about. A sufficiently firm fit both guides into each other is inventive according to either by wedge effect or by Materiä, lverfo @ rmüng achieved. The so. with the bike blades connected to the disc can be special auxiliary devices are welded, The drawing shows an exemplary embodiment in Fig. I and 2) in section. ' In Fig. Z are ain the circumference of the wheel disk d two a conical ring groove f delimiting guide Stanchions g, g provided against the side surface jump back from the wheel disk d and from the Welding sticks i are separated by annular joints h . Furthermore, g is located between the guides a wedge surface n. The corresponding guide part the blade a (Fig. 2) consists of a spreading foot m. When placing the shovel on the wheel disk, the blade root is m through the wedge area spread or correspondingly deformed and thereby stuck. The .Side @ fillings g, g prevent the Shovel at. Pressing on. The margins of The blades and the wheel disc come exactly to the Welding points, lying on top of each other. Hall ring joints h disrupt the heat transfer during the Welding process and thus prevent an impairment flow of the blade seat through the welding warmth. The wedge n can be either independently in introduced individual pieces or as a ring wedge be carved out of the disc material ..

Claims (1)

PATENTANSPRÜCHE: ,r. Befestigung für axial beaufschlagte Tu.r- binenschaufeln an, der Radscheibe durch je eine Schweißnaht an jeder Seite der Radscheibe, ge- kennzeichnet durch .eine vom, den Schweißnähten (i) durch mindestens einen, Ringraum (h) ge- trennte Hilfsverbindung (m, n.) zur Festlegung der Schaufeln (a) während des Schweißens. 2. Schaufelbefestigung nach Anspruch i, da- durch gekennzeichnet, daß die Schaufel mit einem Spreizfuß: (m) mit Führungen (g, g) und die Radscheibe mit einem. Keil (n) versehen ist, die den Spreizfuß durch Verformung festhalten. 3. Schweißverbindung nach Anspruch i und 2, dadurch gekennzeichnet, dä,ß die Führungen (g) der Radscheibe (d) und der Spreizfuß (M) der Schaufel (a,) durch die Ringräume (h) von den Schweißstellen (i) getrennt sind:
Angezogene Druckschriften.: Deutsche Patentschrift Nr. 684 499 schweizerische Patentschriften Nr. 172-160, 218-177-
PATENT CLAIMS: , r. Fixing for axially loaded door tine shovels, the wheel disc through one each Weld seam on each side of the wheel disc, denotes by .eine vom, the welds (i) through at least one, annular space (h) Separated auxiliary connection (m, n.) for definition the blades (a) during welding. 2. blade attachment according to claim i, there- characterized in that the shovel with a splayfoot: (m) with guides (g, g) and the wheel disc with a. Wedge (s) is provided, which hold the splayfoot by deformation. 3. Welded connection according to claim i and 2, characterized in that the guides (g) the wheel disc (d) and the splayfoot (M) of the Blade (a,) through the annular spaces (h) from the Welding points (i) are separated:
Referred publications .: German patent specification No. 684 499 Swiss patents No. 172-160, 218-177-
DED2991D 1942-03-17 1942-03-17 Attachment for axially loaded turbine blades to the wheel disc by welded seams Expired DE873553C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED2991D DE873553C (en) 1942-03-17 1942-03-17 Attachment for axially loaded turbine blades to the wheel disc by welded seams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED2991D DE873553C (en) 1942-03-17 1942-03-17 Attachment for axially loaded turbine blades to the wheel disc by welded seams

Publications (1)

Publication Number Publication Date
DE873553C true DE873553C (en) 1953-04-16

Family

ID=7030259

Family Applications (1)

Application Number Title Priority Date Filing Date
DED2991D Expired DE873553C (en) 1942-03-17 1942-03-17 Attachment for axially loaded turbine blades to the wheel disc by welded seams

Country Status (1)

Country Link
DE (1) DE873553C (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH172160A (en) * 1932-09-09 1934-09-30 Bbc Brown Boveri & Cie Blade attachment for steam and gas turbines.
DE684499C (en) * 1938-02-13 1939-11-29 Rheinmetall Borsig Akt Ges Welding attachment for blades of centrifugal machines, especially steam and gas turbines
CH218177A (en) * 1939-09-27 1941-11-30 Sulzer Ag Rotor welded together from individual parts for steam or gas turbines.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH172160A (en) * 1932-09-09 1934-09-30 Bbc Brown Boveri & Cie Blade attachment for steam and gas turbines.
DE684499C (en) * 1938-02-13 1939-11-29 Rheinmetall Borsig Akt Ges Welding attachment for blades of centrifugal machines, especially steam and gas turbines
CH218177A (en) * 1939-09-27 1941-11-30 Sulzer Ag Rotor welded together from individual parts for steam or gas turbines.

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