EP0061375A1 - Roue à aubes et outillages et procédés pour les fabriquer par moulage - Google Patents

Roue à aubes et outillages et procédés pour les fabriquer par moulage Download PDF

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Publication number
EP0061375A1
EP0061375A1 EP82400384A EP82400384A EP0061375A1 EP 0061375 A1 EP0061375 A1 EP 0061375A1 EP 82400384 A EP82400384 A EP 82400384A EP 82400384 A EP82400384 A EP 82400384A EP 0061375 A1 EP0061375 A1 EP 0061375A1
Authority
EP
European Patent Office
Prior art keywords
core
axis
blades
hub
box
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Withdrawn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
EP82400384A
Other languages
German (de)
English (en)
French (fr)
Inventor
Joel Chadaineau
Michel Degay
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.)
Pompes Guinard SA
Original Assignee
Pompes Guinard SA
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 Pompes Guinard SA filed Critical Pompes Guinard SA
Publication of EP0061375A1 publication Critical patent/EP0061375A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly

Definitions

  • the present invention relates to impellers and tools and methods for manufacturing them by molding.
  • centrifugal radial or centripetal
  • axial the fluid particles remain substantially at constant distance from the axis of rotation
  • helico-centrifugal or helico-centripetal
  • the layout of the blades of these wheels is governed by hydraulic considerations, which in particular define the entry angle, exit angle, length, height, leading edge and profile.
  • the resulting dawn has a complicated left shape. It cannot be removed from the mold.
  • we create sand cores by assembling sectors which we hold together by neck lage and tie. These assemblies give a foundry piece, which has numerous burrs, which requires subsequent deburring, the dimensions of which are neither precise nor reproducible and whose surface condition is very poor.
  • a monobloc core is used and the corer shakes the fins of the core box to remove them from the core during the preparation of the latter.
  • the invention overcomes these drawbacks with a helical-centrifugal paddle wheel, the surface condition of which as found in the foundry or molding is an, the dimensions of which are precise and can correspond exactly to the plans supplied to the founder without that -this encounters insurmountable difficulties, and whose manufacture is faster than in the past and can be automated.
  • this impeller has at least the same performance as conventional helical-centrifugal wheels and often performs better than the latter.
  • the subject of the invention is a paddle wheel, comprising a flange, forming a hub, which is of revolution about an axis and from which helical-centric blades are born. fuges admitting the axis of the hub as a repetition axis, characterized in that the imaginary extension of the generatrix of the flange intersects the axis of the hub and the lower and upper surfaces of the blades extend over portions of cylinder surfaces whose axes are inclined with respect to that of the hub.
  • the section of the cylinders is a circle and the flange is substantially frustoconical.
  • the invention also relates to a core box which comprises helico-centrifugal blades, with a repetition axis, the lower surface and the upper surface of each blade extending respectively over surface portions of cylinders whose axes of revolution are inclined. compared to that of repetition.
  • the method of molding metal impellers according to the invention consists in creating a core of sand in which cavities are formed in the shape of the blades of the molding wheel, in filling these cavities with liquid metal, in allowing the metal to solidify in one piece and destroy the core of sand to release the piece, and is characterized in that it consists in filling the core box with sand according to the invention, in hardening the sand in a core and in demolding the core of the box by removing the blades of the box from the core, imparting a translational movement along their axis of revolution.
  • the wheel of FIG. 1 comprises six helico-centrifugal blades 1 (only one of which is shown), the lower surface 2 and the upper surface 3 respectively extending over portions of cylinder surfaces, of circular section, the axes of which Y, Y 'are inclined relative to the axis X, X' of repetition of the blades 1.
  • the wheel comprises a flange 4 of revolution around the axis X, X '.
  • the flange is substantially frustoconical.
  • the vanes 1 start from the flange 4.
  • the model plates are obtained in the conventional manner without difficulty.
  • the core box essentially consists of a box bottom 11, a set of blades 12 and a cap 13.
  • Each blade 12 has a lower surface and an upper surface which extend over portions of surfaces of a cylinder of which the axis is inclined relative to that X, X "of the bottom 11.
  • footing 14 It is advisable to add to the dawn proper a part called footing 14 (FIG. 4).
  • This "trampling" is embedded in the bottom 11 of the box like a tenon in a mortise and will allow the establishment and disassembly of the blade 12 on the bottom 11 of the box.
  • Each blade 12 is removed from the sand core by a translational movement along the axis of the cylinder on which the blade extends.
  • the core box makes it possible to manufacture as many cores 11 from sand as there are to be paddle wheels. Each core 11 is placed between the two chassis 9 10. Metal is poured. The cast wheel is released by removing the sand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP82400384A 1981-03-13 1982-03-05 Roue à aubes et outillages et procédés pour les fabriquer par moulage Withdrawn EP0061375A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8105063A FR2501801A1 (fr) 1981-03-13 1981-03-13 Roue a aubes et outillages et procedes pour les fabriquer par moulage
FR8105063 1981-03-13

Publications (1)

Publication Number Publication Date
EP0061375A1 true EP0061375A1 (fr) 1982-09-29

Family

ID=9256219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400384A Withdrawn EP0061375A1 (fr) 1981-03-13 1982-03-05 Roue à aubes et outillages et procédés pour les fabriquer par moulage

Country Status (5)

Country Link
EP (1) EP0061375A1 (it)
BE (1) BE892410A (it)
FR (1) FR2501801A1 (it)
GB (1) GB2094897A (it)
IT (1) IT1157637B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864758A3 (en) * 1997-03-14 1999-10-06 Dab Pumps S.p.A. Impeller for turbine pumps provided with vanes having an improved profile
CN111790903A (zh) * 2019-04-09 2020-10-20 阿特拉斯·科普柯空气动力股份有限公司 用于铸造具有纵向轴线的转子的方法和装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736175A1 (de) * 1987-10-26 1989-05-11 Ksb Ag Rohling fuer ein kreiselpumpenlaufrad
US6663347B2 (en) 2001-06-06 2003-12-16 Borgwarner, Inc. Cast titanium compressor wheel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH346644A (de) * 1955-11-11 1960-05-31 Maschf Augsburg Nuernberg Ag Laufrad für Zentrifugalverdichter
US3206807A (en) * 1964-10-29 1965-09-21 Worthington Corp Method of and means for making cores for impellers of the francis type
DE1508710A1 (de) * 1964-10-26 1969-10-30 North American Rockwell Verfahren und Vorrichtung zum Herstellen von Kernen zum Giessen von Schaufelraedern
FR2396191A1 (fr) * 1977-06-29 1979-01-26 Kawasaki Heavy Ind Ltd Rotor de ventilateur a flux diagonal dont les pales presentent une surface developpable
US4231413A (en) * 1979-02-27 1980-11-04 Graham Bretzger Assembly for and method of making mold and casting of one-piece impellers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB823275A (en) * 1955-11-11 1959-11-11 Maschf Augsburg Nuernberg Ag Improvements in or relating to rotor blades for radial-flow compressors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH346644A (de) * 1955-11-11 1960-05-31 Maschf Augsburg Nuernberg Ag Laufrad für Zentrifugalverdichter
DE1508710A1 (de) * 1964-10-26 1969-10-30 North American Rockwell Verfahren und Vorrichtung zum Herstellen von Kernen zum Giessen von Schaufelraedern
US3206807A (en) * 1964-10-29 1965-09-21 Worthington Corp Method of and means for making cores for impellers of the francis type
FR2396191A1 (fr) * 1977-06-29 1979-01-26 Kawasaki Heavy Ind Ltd Rotor de ventilateur a flux diagonal dont les pales presentent une surface developpable
US4231413A (en) * 1979-02-27 1980-11-04 Graham Bretzger Assembly for and method of making mold and casting of one-piece impellers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864758A3 (en) * 1997-03-14 1999-10-06 Dab Pumps S.p.A. Impeller for turbine pumps provided with vanes having an improved profile
US6082000A (en) * 1997-03-14 2000-07-04 Dab Pumps S.P.A. Method for producing an impeller for turbine pumps provided with vanes having an improved profile
CN111790903A (zh) * 2019-04-09 2020-10-20 阿特拉斯·科普柯空气动力股份有限公司 用于铸造具有纵向轴线的转子的方法和装置
CN111790903B (zh) * 2019-04-09 2021-09-21 阿特拉斯·科普柯空气动力股份有限公司 用于铸造具有纵向轴线的转子的方法和装置

Also Published As

Publication number Publication date
IT1157637B (it) 1987-02-18
BE892410A (fr) 1982-09-08
FR2501801A1 (fr) 1982-09-17
IT8212447A0 (it) 1982-02-24
GB2094897A (en) 1982-09-22
IT8212447A1 (it) 1983-08-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT DE LU NL SE

17P Request for examination filed

Effective date: 19821004

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19840123

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DEGAY, MICHEL

Inventor name: CHADAINEAU, JOEL