EP0291040A1 - Fork-like device facilitating the mounting of a disk rotor for a steam turbine - Google Patents

Fork-like device facilitating the mounting of a disk rotor for a steam turbine Download PDF

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Publication number
EP0291040A1
EP0291040A1 EP88107601A EP88107601A EP0291040A1 EP 0291040 A1 EP0291040 A1 EP 0291040A1 EP 88107601 A EP88107601 A EP 88107601A EP 88107601 A EP88107601 A EP 88107601A EP 0291040 A1 EP0291040 A1 EP 0291040A1
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EP
European Patent Office
Prior art keywords
pins
female
male
disc
fork
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
Application number
EP88107601A
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German (de)
French (fr)
Other versions
EP0291040B1 (en
Inventor
Daniel Fleury
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.)
Alstom Holdings SA
Original Assignee
Alstom SA
GEC Alsthom SA
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Publication date
Application filed by Alstom SA, GEC Alsthom SA filed Critical Alstom SA
Priority to AT88107601T priority Critical patent/ATE63364T1/en
Publication of EP0291040A1 publication Critical patent/EP0291040A1/en
Application granted granted Critical
Publication of EP0291040B1 publication Critical patent/EP0291040B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
    • F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
    • 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
    • Y10T29/49799—Providing transitory integral holding or handling portion
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53978—Means to assemble or disassemble including means to relatively position plural work parts

Definitions

  • the present invention relates to a method for mounting a steam turbine rotor consisting of hooped discs on a shaft, said discs being provided with facing cavities, in which female pins are placed in said cavities of a disc and male studs in the facing cavities belonging to the adjacent disc, then each of the discs is hooped by placing the male studs of said disc in the female pawns of the adjacent disc already shrunk.
  • the mounting method according to the invention making it possible to eliminate these risks is characterized in that there are means of spacing in female pawns before introducing the male pawns into the female pawns so that the male pawns are not in contact with the female pins, then remove the spacing means.
  • the spacing means are not removed until after the overspeed tests, which makes it possible to guarantee the presence of a residual clearance between the positioning pins during normal operation.
  • the invention also relates to a fork for application of the method in which the male pin has a pin with two walls parallel to the axis of the rotor spaced from a and the female pin a complementary groove with two walls parallel to the walls of the pin spaced from a + 2d, characterized in that it comprises a handle with two teeth of thickness slightly less than d whose outer edges are spaced from a + 2d and which can be arranged against the walls of the groove.
  • the two teeth have two flaps in a plane perpendicular to the plane of the teeth and coming to be placed on the surface of the female pin on either side of the groove.
  • the turbine rotor to which the invention is applied comprises a shaft 1 around which discs 2 bearing vanes 3 are hooped.
  • the discs 2 are provided with cylindrical cavities 4 facing each other.
  • the cavities 4 on one face of a disk are provided with female pins 5 and the cavities on the face of the neighboring disk which come opposite the female pins 5 are provided with male pins 6 (see FIGS. 2, 3 and 4).
  • the male pin 6 comprises a head 7 filling the cavity 4 and a tenon 8 with two walls parallel to the axis of the rotor spaced by a distance a.
  • the female pin has inside the head 9 a groove 10 complementary to the stud 8 but of width a + 2d.
  • the height of the tenon 8 is less than the depth of the groove 10.
  • the pins 5, 6 are locked in the cavities 4 by keys 11.
  • a fork provided with a handle 13 and two teeth 14 is used for each assembly between two pins 5, 6.
  • the two teeth 14 have a thickness less than d and their outer edges 15 are spaced from a + 2d. .
  • These teeth 14 are provided with two flaps 16 outwardly which come to bear on either side of the groove 10 on the surface 17 of the female pin 5 when the teeth are arranged in the groove.
  • the flaps 16 are arranged at right angles to the teeth 14.
  • the discs 2 have been provided with notches 18 on the face which receives the female pins 5. These notches 18 connect the external surface of the disc 2 to the cavities 4.
  • a fork 12 is placed in each notch 18.
  • the handle 13 of the fork 12 is integral with lugs 19 which are bolted to the disc 2 thus holding the fork 12 in place.
  • the forks 12 were mounted on the disc 2 before it was hooped.
  • the male pins 6 of the neighboring disc are fitted into the female pins 5 of the hooped disc. Thanks to the forks 12, the pins 8 of the male pins 6 are not in contact with the grooves 10 of the female pins 5.
  • the forks 12 are kept in place so that the absence of contact is maintained. After these tests, the forks 12 are removed for normal operation of the turbine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Automatic Assembly (AREA)
  • Braking Arrangements (AREA)

Abstract

A method of assembling a rotor of a steam turbine constituted by disks (2) shrunk onto a shaft, the disks (2) being provided with cavities (4) facing one another and having female pegs (5) disposed in the cavities in one disk (2) and male pegs (6) disposed in the facing cavities (4) of an adjacent disk (2) with each of the disks (2) being shrunk on while disposing the male pegs (6) of the disks into the female pegs (5) of the already shrunk-on adjacent disk, the method being characterized in that spacers (12) are provided in the female pegs (5) prior to inserting the male pegs (6) in the female pegs (5) so that the male pegs (6) do not come into contact with the female pegs (5), with the spacers (12) subsequently being removed.

Description

La présente invention a trait à un procédé de montage d'un rotor de turbine à vapeur constitué de disques frettés sur un arbre, lesdits disques étant munis de cavités se faisant face, dans lequel on dispose des pions femelles dans lesdites cavités d'un disque et des pions mâ­les dans les cavités en regard appartenant au disque adjacent puis on frette chacun des disques en disposant les pions mâles dudit disque dans les pions femelles du disque adjacent déjà fretté.The present invention relates to a method for mounting a steam turbine rotor consisting of hooped discs on a shaft, said discs being provided with facing cavities, in which female pins are placed in said cavities of a disc and male studs in the facing cavities belonging to the adjacent disc, then each of the discs is hooped by placing the male studs of said disc in the female pawns of the adjacent disc already shrunk.

Les pions assurent la position relative de ces disques les uns par rapport aux autres. Un tel rotor est décrit dans le document FR-A-2295226.The pins ensure the relative position of these discs relative to each other. Such a rotor is described in document FR-A-2295226.

L'inventeur s'est aperçu que lorsque les pions mâles étaient en contact avec les pions femelles il y avait des risques de corrosion sous tension. Le procédé de montage selon l'invention permettant d'éliminer ces risques est caractérisé en ce qu'on dispose des moyens d'écartement dans des pions femelles avant d'introduire les pions mâles dans les pions femelles de façon à ce que les pions mâles ne soient pas en contact avec les pions femelles, puis on enlève les moyens d'écartement.The inventor realized that when the male pins were in contact with the female pins there was a risk of corrosion under tension. The mounting method according to the invention making it possible to eliminate these risks is characterized in that there are means of spacing in female pawns before introducing the male pawns into the female pawns so that the male pawns are not in contact with the female pins, then remove the spacing means.

De préférence les moyens d'écartement ne sont enlevés qu'après les essais de survitesse ce qui permet de garantir la présence d'un jeu résiduel entre les pions de positionnement lors d'un fonctionnement normal.Preferably the spacing means are not removed until after the overspeed tests, which makes it possible to guarantee the presence of a residual clearance between the positioning pins during normal operation.

L'invention concerne également une fourchette pour application du procédé dans lequel le pion mâle comporte un tenon avec deux parois parallèles à l'axe du rotor écartées de a et le pion femelle une rainu­re complémentaire avec deux parois parallèles aux parois du tenon écartées de a+2d,
caractérisée en ce qu'elle comporte un manche avec deux dents d'épaisseur légèrement inférieure à d dont les bords extérieurs sont écartés de a+2d et qui peuvent être disposés contre les parois de la rainure.The invention also relates to a fork for application of the method in which the male pin has a pin with two walls parallel to the axis of the rotor spaced from a and the female pin a complementary groove with two walls parallel to the walls of the pin spaced from a + 2d,
characterized in that it comprises a handle with two teeth of thickness slightly less than d whose outer edges are spaced from a + 2d and which can be arranged against the walls of the groove.

Selon une réalisation préférentielle de la fourchette selon l'in­vention, les deux dents comportent deux rabats dans un plan perpendiculaire au plan des dents et venant se placer sur la surface du pion femelle de part et d'autre de la rainure.According to a preferred embodiment of the fork according to the invention, the two teeth have two flaps in a plane perpendicular to the plane of the teeth and coming to be placed on the surface of the female pin on either side of the groove.

La présente invention sera mieux comprise à la lumière de la description qui va suivre dans laquelle :

  • -La figure 1 représente une coupe longitudinale partielle d'un rotor de turbine.
  • -La figure 2 représente une vue en coupe partielle des pions emboîtés.
  • -La figure 3 représente une vue en coupe selon III-III de la figure 2.
  • -La figure 4 représente une vue coupe partielle selon IV-IV de la figure 3.
  • -La figure 5 représente l'assemblage de la figure 2 avec la fourchette en place.
  • -La figure 6 représente une coupe selon VI-VI de la figure 5 avec arrachement partiel.
  • -La figure 7 représente une coupe selon VII-VII de la figure 6.
The present invention will be better understood in the light of the description which follows in which:
  • FIG. 1 represents a partial longitudinal section of a turbine rotor.
  • FIG. 2 represents a partial section view of the nested pins.
  • FIG. 3 represents a sectional view along III-III of FIG. 2.
  • FIG. 4 represents a partial section view along IV-IV of FIG. 3.
  • - Figure 5 shows the assembly of Figure 2 with the fork in place.
  • - Figure 6 shows a section along VI-VI of Figure 5 with partial cutaway.
  • FIG. 7 represents a section along VII-VII of FIG. 6.

Le rotor de turbine auquel est appliqué l'invention, comporte un arbre 1 autour duquel sont frettés des disques 2 portant des aubes 3.The turbine rotor to which the invention is applied comprises a shaft 1 around which discs 2 bearing vanes 3 are hooped.

Les disques 2 sont munis de cavités cylindriques 4 se faisant face. Les cavités 4 sur une face d'un disque sont munis de pions femelles 5 et les cavités sur la face du disque voisin qui viennent en regard des pions femelles 5 sont munis de pions mâles 6 (voir figures 2, 3 et 4).The discs 2 are provided with cylindrical cavities 4 facing each other. The cavities 4 on one face of a disk are provided with female pins 5 and the cavities on the face of the neighboring disk which come opposite the female pins 5 are provided with male pins 6 (see FIGS. 2, 3 and 4).

Le pion mâle 6 comporte une tête 7 emplissant la cavité 4 et un tenon 8 avec deux parois parallèles à l'axe du rotor écartées d'une distance a. Le pion femelle comporte à l'intérieur de la tête 9 une rainure 10 complémentaire du tenon 8 mais de largeur a+2d. La hauteur du tenon 8 est inférieure à la profondeur de la rainure 10.The male pin 6 comprises a head 7 filling the cavity 4 and a tenon 8 with two walls parallel to the axis of the rotor spaced by a distance a. The female pin has inside the head 9 a groove 10 complementary to the stud 8 but of width a + 2d. The height of the tenon 8 is less than the depth of the groove 10.

Les pions 5, 6 sont bloqués dans les cavités 4 par des clavet­tes 11.The pins 5, 6 are locked in the cavities 4 by keys 11.

Pour monter les disques on procéde classiquement de la façon suivante.To mount the discs, we conventionally proceed as follows.

On vient fretter sur l'arbre un premier disque 2 avec ses cavités 4 munies de pions femelles 5. Puis on amène autour de l'arbre un second disque 2 avec sur sa face en regard les cavités 4 munies de pions mâles 6. On engage les tenons 8 des pions mâles 6 dans les rainures 10 des pions femelles 5, puis on frette le second disque 2 et ainsi de suite pour les disques suivants.We come to hoop on the tree a first disc 2 with its cavities 4 provided with female pawns 5. Then we bring around the tree a second disc 2 with the cavities 4 provided with male pawns on its opposite face. the pins 8 of the male pins 6 in the grooves 10 of the female pins 5, then the second disc 2 is fretted and so on for the following discs.

Selon l'invention on utilise pour chaque assemblage entre deux pions 5, 6 une fourchette munie d'un manche 13 et de deux dents 14. Les deux dents 14 ont une épaisseur inférieure à d et leurs bords extérieurs 15 sont écartées de a+2d.According to the invention, a fork provided with a handle 13 and two teeth 14 is used for each assembly between two pins 5, 6. The two teeth 14 have a thickness less than d and their outer edges 15 are spaced from a + 2d. .

Ces dents 14 sont munies de deux rabats 16 vers l'extérieur qui viennent s'appliquer de part et d'autre de la rainure 10 sur la surface 17 du pion femelle 5 lorsque les dents sont disposées dans la rainure.These teeth 14 are provided with two flaps 16 outwardly which come to bear on either side of the groove 10 on the surface 17 of the female pin 5 when the teeth are arranged in the groove.

Les rabats 16 sont disposés à angle droit par rapport aux dents 14.The flaps 16 are arranged at right angles to the teeth 14.

Les disques 2 ont été munis d'encoches 18 sur la face qui réçoit les pions femelles 5. Ces encoches 18 relient la surface extérieure du disque 2 aux cavités 4. On dispose dans chaque encoche 18 une fourchette 12. Le manche 13 de la fourchette 12 est solidaire de pattes 19 qui sont boulonnées sur le disque 2 maintenant ainsi en place la fourchette 12.The discs 2 have been provided with notches 18 on the face which receives the female pins 5. These notches 18 connect the external surface of the disc 2 to the cavities 4. A fork 12 is placed in each notch 18. The handle 13 of the fork 12 is integral with lugs 19 which are bolted to the disc 2 thus holding the fork 12 in place.

Les fourchettes 12 ont été montées sur le disque 2 avant son frettage.The forks 12 were mounted on the disc 2 before it was hooped.

Après frettage on vient emboîter les pions mâles 6 du disque voisin dans les pions femelles 5 du disque fretté. Grâce aux fourchettes 12 les tenons 8 des pions mâles 6 ne se trouvent pas au contact des rainures 10 des pions femelles 5.After hooping, the male pins 6 of the neighboring disc are fitted into the female pins 5 of the hooped disc. Thanks to the forks 12, the pins 8 of the male pins 6 are not in contact with the grooves 10 of the female pins 5.

Ainsi on est assuré que les pions mâles 6 ne se trouvent pas en contact avec les pions femelles 5. Lorsqu'on effectue les essais de survitesse on garde les fourchettes 12 en place si bien que l'absence de contact se maintient. Après ces essais on retire les fourchettes 12 pour le fonctionnement normal de la turbine.Thus it is ensured that the male pins 6 are not in contact with the female pins 5. When carrying out the overspeed tests, the forks 12 are kept in place so that the absence of contact is maintained. After these tests, the forks 12 are removed for normal operation of the turbine.

Claims (5)

1/ Procédé de montage d'un rotor de turbine à vapeur constitué de disques frettés (2) sur un arbre (1), lesdits disques (2) étant munis de cavités (4) se faisant face dans lequel on dispose des pions femelles (5) dans lesdites cavités (4) d'un disque (2) et des pions mâles (6) dans les cavités (4) en regard appartenant au disque adjacent (2) puis on frette chacun des disques (2) en disposant les pions mâles (6) dudit disque dans les pions femelles (5) du disque adja­cent déjà fretté, caractérisé en ce qu'on dispose des moyens d'écartement (12) dans des pions femelles (5) avant d'introduire les pions mâles (6) dans les pions femelles (5) de façon à ce que les pions mâles (6) ne soient pas en contact avec les pions femelles (5), puis on enlève les moyens d'écartement (12).1 / Method for mounting a steam turbine rotor consisting of hooped discs (2) on a shaft (1), said discs (2) being provided with cavities (4) facing each other in which there are female pins ( 5) in said cavities (4) of a disc (2) and male pins (6) in the opposite cavities (4) belonging to the adjacent disc (2) then each of the discs (2) is hooped by arranging the pins male (6) of said disc in the female pins (5) of the adjacent already shrunk disc, characterized in that there are spacing means (12) in female pins (5) before introducing the male pins (6 ) in the female pins (5) so that the male pins (6) are not in contact with the female pins (5), then the spacing means (12) are removed. 2/ Procédé de montage selon la revendication 1, caractérisé en ce que les moyens d'écartement (12) ne sont enlevés qu'après les essais en survitesse.2 / assembly method according to claim 1, characterized in that the spacing means (12) are removed only after the overspeed tests. 3/ Fourchette pour l'application du procédé selon les revendications 1 ou 2, dans lequel le pion mâle (6) comporte un tenon (8) avec deux parois parallèles à l'axe du rotor écartées de a et le pion femelle (5) une rainure (10) complémentaire avec deux parois parallèles aux parois du tenon (8) écartées de a+2d,
caractérisée en ce qu'elle comporte un manche (13) avec deux dents (14) d'épaisseur légèrement inférieure à d dont les bords extérieurs (15) sont écartés de a+2d et qui peuvent être disposés contre les parois de la rainure (10).3 / fork for the application of the method according to claims 1 or 2, wherein the male pin (6) comprises a pin (8) with two walls parallel to the axis of the rotor spaced from a and the female pin (5) a complementary groove (10) with two walls parallel to the walls of the post (8) spaced from a + 2d,
characterized in that it comprises a handle (13) with two teeth (14) of thickness slightly less than d whose outer edges (15) are spaced from a + 2d and which can be arranged against the walls of the groove ( 10). 4/ Fourchette selon la revendication 3, caractérisée en ce que les deux dents comportent deux rabats (16) dans un plan perpendiculaire au plan des dents et venant se placer sur la surface (17) du pion femelle (5) de part et d'autre de la rainure (10).4 / fork according to claim 3, characterized in that the two teeth have two flaps (16) in a plane perpendicular to the plane of the teeth and coming to be placed on the surface (17) of the female pin (5) on both sides other of the groove (10). 5/ Fourchette selong l'une des revendications 3 ou 4, caractérisée en ce que le manche (13) est fixé de façon amovible au disque (2).5 / selong fork one of claims 3 or 4, characterized in that the handle (13) is removably attached to the disc (2).
EP88107601A 1987-05-14 1988-05-11 Fork-like device facilitating the mounting of a disk rotor for a steam turbine Expired - Lifetime EP0291040B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107601T ATE63364T1 (en) 1987-05-14 1988-05-11 FORK-SHAPED ASSEMBLY AID TO FACILITATE THE ASSEMBLY OF A DISC ROTOR FOR A STEAM TURBINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706784 1987-05-14
FR8706784A FR2615242B1 (en) 1987-05-14 1987-05-14 METHOD FOR ASSEMBLING A STEAM TURBINE ROTOR CONSISTING OF BRAKE DISCS ON A SHAFT AND FORK FOR MOUNTING THE SAME

Publications (2)

Publication Number Publication Date
EP0291040A1 true EP0291040A1 (en) 1988-11-17
EP0291040B1 EP0291040B1 (en) 1991-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107601A Expired - Lifetime EP0291040B1 (en) 1987-05-14 1988-05-11 Fork-like device facilitating the mounting of a disk rotor for a steam turbine

Country Status (12)

Country Link
US (2) US4860418A (en)
EP (1) EP0291040B1 (en)
JP (1) JPS63302101A (en)
CN (1) CN1012095B (en)
AT (1) ATE63364T1 (en)
CZ (1) CZ329188A3 (en)
DE (1) DE3862679D1 (en)
ES (1) ES2022525B3 (en)
FR (1) FR2615242B1 (en)
GR (1) GR3002238T3 (en)
MX (1) MX169353B (en)
ZA (1) ZA883403B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120087799A1 (en) * 2010-10-12 2012-04-12 General Electric Company Axial retention device for turbine system
CN103612092B (en) * 2013-11-21 2015-12-09 国家电网公司 Suspension type thrust head of water turbine power generating set dismounting technique
US9909595B2 (en) * 2015-07-21 2018-03-06 General Electric Company Patch ring for a compressor

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Publication number Priority date Publication date Assignee Title
US2818228A (en) * 1954-04-30 1957-12-31 Rolls Royce Rotor for gas-turbine engine with means to locate rotor discs with respect to one another
DE1284689B (en) * 1962-05-10 1968-12-05 Licentia Gmbh Faceplate stack, e.g. B. composed of face plates and axially clamped runners of a thermal axial turbine, in particular gas turbine
FR2295226A1 (en) * 1974-12-16 1976-07-16 Europ Turb Vapeur Turbine rotor disc mounting - uses tongue and groove dowel to accommodate radial displacements

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US2179556A (en) * 1933-03-08 1939-11-14 Milo Ab Method of making turbines
US2034238A (en) * 1934-12-29 1936-03-17 John N Karalis Pie rack
US2800706A (en) * 1947-10-17 1957-07-30 Lindblom Erik David Method of manufacturing blade rings for radial flow elastic fluid machines
US2639119A (en) * 1947-11-14 1953-05-19 Lockheed Aircraft Corp Rotor blade attachment means and method
US3078020A (en) * 1962-04-04 1963-02-19 Richard N Boonstra Horticultural carrying apparatus
US3272350A (en) * 1964-09-25 1966-09-13 Westinghouse Electric Corp Method and apparatus for semiconductor wafer handling
US3745628A (en) * 1971-07-29 1973-07-17 Westinghouse Electric Corp Rotor structure and method of construction
US4417425A (en) * 1977-02-11 1983-11-29 Dayton Superior Corporation Apparatus for erecting concrete wall panels
US4494287A (en) * 1983-02-14 1985-01-22 Williams International Corporation Method of manufacturing a turbine rotor
IT1167241B (en) * 1983-10-03 1987-05-13 Nuovo Pignone Spa IMPROVED SYSTEM FOR FIXING STATOR NOZZLES TO THE CASE OF A POWER TURBINE
GB2193125B (en) * 1986-08-01 1990-07-18 Rolls Royce Plc Gas turbine engine rotor assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818228A (en) * 1954-04-30 1957-12-31 Rolls Royce Rotor for gas-turbine engine with means to locate rotor discs with respect to one another
DE1284689B (en) * 1962-05-10 1968-12-05 Licentia Gmbh Faceplate stack, e.g. B. composed of face plates and axially clamped runners of a thermal axial turbine, in particular gas turbine
FR2295226A1 (en) * 1974-12-16 1976-07-16 Europ Turb Vapeur Turbine rotor disc mounting - uses tongue and groove dowel to accommodate radial displacements

Also Published As

Publication number Publication date
ES2022525B3 (en) 1991-12-01
MX169353B (en) 1993-06-30
ZA883403B (en) 1988-11-15
US4860418A (en) 1989-08-29
JPS63302101A (en) 1988-12-09
FR2615242B1 (en) 1989-07-07
CZ329188A3 (en) 1993-08-11
CN1012095B (en) 1991-03-20
FR2615242A1 (en) 1988-11-18
GR3002238T3 (en) 1992-12-30
EP0291040B1 (en) 1991-05-08
US5050287A (en) 1991-09-24
CN88102748A (en) 1988-11-30
DE3862679D1 (en) 1991-06-13
ATE63364T1 (en) 1991-05-15

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