EP2064440A1 - Procédé de fabrication de la roue à aubes d'une turbine hydraulique et roue à aubes - Google Patents

Procédé de fabrication de la roue à aubes d'une turbine hydraulique et roue à aubes

Info

Publication number
EP2064440A1
EP2064440A1 EP07801548A EP07801548A EP2064440A1 EP 2064440 A1 EP2064440 A1 EP 2064440A1 EP 07801548 A EP07801548 A EP 07801548A EP 07801548 A EP07801548 A EP 07801548A EP 2064440 A1 EP2064440 A1 EP 2064440A1
Authority
EP
European Patent Office
Prior art keywords
impeller
blade
rotor
free ends
stumps
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Withdrawn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
EP07801548A
Other languages
German (de)
English (en)
Inventor
Hans-Günther POLL
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.)
Voith Hydro Holding GmbH and Co KG
Original Assignee
Voith Siemens Hydro Power Generation GmbH and Co KG
Voith Hydro Holding GmbH and Co KG
Voith Hydro GmbH and Co KG
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 Voith Siemens Hydro Power Generation GmbH and Co KG, Voith Hydro Holding GmbH and Co KG, Voith Hydro GmbH and Co KG filed Critical Voith Siemens Hydro Power Generation GmbH and Co KG
Publication of EP2064440A1 publication Critical patent/EP2064440A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
    • 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
    • B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/10—Manufacture by removing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/21—Manufacture essentially without removing material by casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05B2230/232—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
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/25—Manufacture essentially without removing material by forging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/50—Building or constructing in particular ways
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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
    • Y10T29/49336—Blade making
    • Y10T29/49337—Composite blade

Definitions

  • the invention relates to the field of water turbines. It relates in particular to a Francis turbine. Also pump turbines come into consideration.
  • Such an impeller is composed of an impeller rim, an impeller bottom and a plurality of arranged between these two blades, which are spatially curved.
  • the impeller must withstand all mechanical loads. Such mechanical stresses are due to high hydraulic forces, mechanical influences, e.g. by foreign bodies, which are in the flowing water, as well as by cavitation. Numerous efforts have been made to reduce the risk of cavitation by appropriate design of the flow paths, in particular the blades. For example, reference is made to WO 98/05863.
  • the invention has for its object to provide a method by which an impeller for a Francis turbine can be produced, with all the requirements in terms of mechanical strength, dimensional accuracy and optimum hydraulic design are met, with the lowest possible cost.
  • the two parts are discs of a corresponding metal, such as martensitic stainless steel.
  • the discs are generally circular discs. Each disc is a monolithic body by itself.
  • One of the two circular disks has an outer diameter which is equal to the outer diameter of the rim of the impeller or slightly larger.
  • the other disc has an outside diameter equal to or slightly larger than the outside diameter of the bottom.
  • the two circular discs are then subjected to a machining process.
  • the wheel rim of the impeller to be produced is worked out of the one circular disk, together with stumps of those blades, which are assigned to the wreath.
  • From the other disc of the impeller floor is worked out, together with stumps of those blades, which are assigned to the impeller floor.
  • the stumps of the floor and the wreath are designed in such a way that in each case a blade stump of the bottom and one of the ring complement each other to a complete blade.
  • the mechanical processing is done for example by means of CNC machines.
  • the mechanical processing gives two parts of the impeller to be produced. These parts are brought together in such a way that the free ends of the blade stubs of the wheel base are opposite the free ends of the blade stubs of the wheel rim. Then the free ends of the blade stubs are welded together.
  • the cut surface along which the blade stub ends are joined may be a plane that is perpendicular to the axis of rotation of the impeller. But it can also be a conical surface, which - based on the stationary impeller - tapers down. To be particularly favorable, a concave conical surface has been found.
  • the invention achieves the following in detail: -
  • the production costs are much cheaper compared to conventional manufacturing processes.
  • the free ends of the blade stumps are above. If voids or gas bubbles are present, they are also at the top, i. at the free ends of the blade stumps; With appropriate oversizing, these areas are removed during mechanical processing.
  • the production can be done quickly, resulting in low delivery times.
  • FIG. 1 shows a Francis turbine in an axial section.
  • Figure 2 shows the impeller of the Francis turbine in an enlarged view.
  • Figure 3 shows the shape of the free end of a blade stub.
  • FIG. 4 shows the free end of another blade stump.
  • FIG. 5 shows a blank as an intermediate for producing the
  • Impeller bottom with associated vane stumps Impeller bottom with associated vane stumps.
  • FIG. 6 shows a blank as an intermediate product for producing the impeller rim with associated blade stubs.
  • Figure 7 shows the one, finished part of an impeller, comprising the
  • Figure 8 shows the other, finished part of an impeller, comprising the rim with blade stumps in perspective view.
  • Figure 9 shows the assembled from the two parts finished impeller in a perspective view.
  • the Francis turbine shown in Figure 1 is constructed as follows: The impeller 1 is rotatably mounted about a rotation axis 3. Impeller 1 is surrounded by a spiral housing 4. In addition, the impeller 1 is preceded by a ring of vanes.
  • the turbine has a suction pipe 6.
  • This includes an inlet diffuser 6.1 with a subsequent thereto manifold 6.2 and in turn here subsequent suction box,
  • the impeller has a plurality of blades 7, further comprising an impeller bottom 8 and an impeller rim 9.
  • the impeller bottom 8 is suspended by tie rods 2.
  • Each blade 7 is assembled from two blade stumps, namely a blade stump 7.1, which is integral with the bottom 8 and a blade stump 7.2, which is part of the impeller ring 9.
  • the numerous blade stump pairs 7.1 and 7.2 are joined together along a contact surface 10 by welding.
  • Figure 5 shows a blank 11. This is an intermediate for the
  • Figure 6 shows a blank 12 as an intermediate product for the impeller ring 9.
  • the two blanks 11 and 12 have substantially the shape of circular discs. They are made by casting or forging. They are subjected to mechanical processing, for example by means of CNC machines. From the blank 11 of the impeller bottom 8 is formed with this molded blade stump 7.1. From the blank 12 of the wreath 9 is formed with this molded blade stump 7.2.
  • FIG. 7 shows the rotor bottom 11 with blade stubs 7.1 formed thereon
  • FIG. 8 shows the rotor ring 12 with blade stumps 7.2 formed thereon.
  • the free ends of the blade stumps 7.1, 7.2 can be prepared in different ways - see Figures 3 and 4.
  • All contact surfaces 10 are in the present case on the lateral surface of a cone (conical surface), which is concave.
  • the contact surface 10 could also be designed differently. For example, it could lie on a conical surface that is purely conical, thus neither concave nor convex. The contact surface between two mutually facing blade stumps 7.1 and 7.2 would thus be a straight line.
  • the contact surface 10 could lie between the totality of all blade stumps in a horizontal plane, which thus extends perpendicular to the axis of rotation 3.
  • the contact surface extends in such a way that it is represented in FIG. 1 as a line which drops from the flowed-on edge of the individual blade 7 to the trailing edge. It could also rise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Turbines (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une roue à aubes pour une turbine Francis qui comprend un disque arrière de roue à aubes, une couronne de roue à aubes ainsi que des aubes mobiles. Le procédé se caractérise par les caractéristiques essentielles suivantes : - deux corps en forme de disque sont formés en métal ; - les deux corps sont soumis à un tel processus d'usinage par enlèvement de matière, le disque arrière de roue à aubes sur lequel sont formé des cônes tronqués d'aubes étant formé dans un des corps, et la couronne de roue à aubes sur laquelle sont formés des cônes tronqués d'aubes étant formée dans l'autre corps de sorte qu'un cône tronqué d'aube du disque arrière de roue à aubes et un cône tronqué d'aube de la couronne de roue à aubes se complètent respectivement pour former une aube complète ; - les deux parties usinées sont associées l'une à l'autre de telle sorte que les extrémités libres des cônes tronqués d'aubes qui sont formés sur le disque arrière de roue à aubes, fassent face aux extrémités libres des cônes tronqués d'aubes qui sont formés sur la couronne de roue à aubes ; - les extrémités libres dirigées l'une vers l'autre sont soudées ensemble.
EP07801548A 2006-09-22 2007-08-08 Procédé de fabrication de la roue à aubes d'une turbine hydraulique et roue à aubes Withdrawn EP2064440A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006044943 2006-09-22
PCT/EP2007/007003 WO2008034492A1 (fr) 2006-09-22 2007-08-08 Procédé de fabrication de la roue à aubes d'une turbine hydraulique et roue à aubes

Publications (1)

Publication Number Publication Date
EP2064440A1 true EP2064440A1 (fr) 2009-06-03

Family

ID=38713738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07801548A Withdrawn EP2064440A1 (fr) 2006-09-22 2007-08-08 Procédé de fabrication de la roue à aubes d'une turbine hydraulique et roue à aubes

Country Status (5)

Country Link
US (1) US20090311102A1 (fr)
EP (1) EP2064440A1 (fr)
BR (1) BRPI0718443A2 (fr)
CA (1) CA2663068A1 (fr)
WO (1) WO2008034492A1 (fr)

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Publication number Priority date Publication date Assignee Title
FR2935761B1 (fr) * 2008-09-05 2010-10-15 Alstom Hydro France Roue de type francis pour machine hydraulique, machine hydraulique comprenant une telle roue et procede d'assemblage d'une telle roue
JP2010121612A (ja) * 2008-10-23 2010-06-03 Mitsubishi Heavy Ind Ltd インペラ、圧縮機およびインペラの製造方法
EP2395246A4 (fr) * 2009-02-06 2018-01-24 Mitsubishi Heavy Industries, Ltd. Roue à aubes, compresseur et procédé de fabrication de roue à aubes
KR101001056B1 (ko) * 2010-02-19 2010-12-14 송길봉 구심력 동작형 수차
CN102554565B (zh) * 2011-12-22 2014-07-30 重庆水轮机厂有限责任公司 冲击式水轮机转轮整体制造方法
JP5998544B2 (ja) * 2012-03-13 2016-09-28 アイシン精機株式会社 インペラの製造方法およびインペラ
NO20121004A1 (no) * 2012-09-06 2013-12-16 Dynavec As Anordning ved sokkelforbindelse for løpehjul
NO334130B1 (no) * 2012-09-07 2013-12-16 Dynavec As Anordning ved løpehjul for hydraulisk strømningsmaskin
FR3016134B1 (fr) * 2014-01-08 2016-04-15 Alstom Renewable Technologies Procede de fabrication d'une roue de type francis pour machine hydraulique et roue fabriquee par un tel procede
CN105057855B (zh) * 2015-08-31 2017-05-17 哈尔滨电机厂有限责任公司 带有基础板单上环式大型分瓣座环装配焊接工艺方法
CN106514143A (zh) * 2016-11-09 2017-03-22 哈尔滨电机厂有限责任公司 大型转轮联轴孔专机加工方法
US11353001B1 (en) 2021-04-30 2022-06-07 Sitkana Inc. Hydrokinetic generator

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US3797965A (en) * 1968-09-02 1974-03-19 Hitachi Ltd Welded type francis runner
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Also Published As

Publication number Publication date
US20090311102A1 (en) 2009-12-17
WO2008034492A1 (fr) 2008-03-27
BRPI0718443A2 (pt) 2013-11-19
CA2663068A1 (fr) 2008-03-27

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