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EP0060760A1 - Flügelrad, Vorrichtungen und Verfahren zu dessen Herstellung durch Giessen - Google Patents

Flügelrad, Vorrichtungen und Verfahren zu dessen Herstellung durch Giessen Download PDF

Info

Publication number
EP0060760A1
EP0060760A1 EP82400383A EP82400383A EP0060760A1 EP 0060760 A1 EP0060760 A1 EP 0060760A1 EP 82400383 A EP82400383 A EP 82400383A EP 82400383 A EP82400383 A EP 82400383A EP 0060760 A1 EP0060760 A1 EP 0060760A1
Authority
EP
European Patent Office
Prior art keywords
axis
core
revolution
sand
blades
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Withdrawn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
EP82400383A
Other languages
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 EP0060760A1 publication Critical patent/EP0060760A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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

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 gluing and tying. These assemblies give a piece of foundry, which has numerous burrs, which requires subsequent deburring, the dimensions of which are neither precise nor reproducible and whose surface condition is very poor.
  • the curvatures of the blades are .nodestes, one uses a monobloc core and the coroner shakes the fins of the core box to take them out of the core during the preparation of the latter.
  • the invention overcomes these drawbacks by a helical-centrifugal impeller, whose surface condition as coming from foundry or molding is an, whose dimensions are precise and can correspond to the plans provided to the founder without that it faces 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 helical-centrifugal impeller, with a repetition axis, characterized in that the lower surface and upper surface of a vane extend respectively over portions of surfaces of revolution of the same axis, the which is other than the axis of repetition and is not perpendicular to it.
  • the axis is at the intersection of a plane parallel to the plane tangent to the blade at a point of the leading edge and of a plane perpendicular to this tangent plane.
  • the invention 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 portions of surfaces of revolution of the same axis, which is other than that of repetition and is not perpendicular to it.
  • 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 unrolling the core of the box by removing the blades of the box from the core, giving them a rotational movement around the axis of the surfaces of revolution.
  • the wheel of FIG. 1 comprises six helico-centrifugal blades 1, the lower surface 2 and the upper surface 3 respectively extending over portions of surfaces of revolution of the same axis, other than the axis X, X 'of repetition of the blades 1.
  • the axis of revolution is at the intersection of a plane parallel to the plane tangent to the blade at the point of the leading edge and a plane perpendicular to this tangent plane.
  • 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.
  • the blades 12 are obtained either from resin cast in the negative, or from metal by sand molding of a model resulting from the negative.
  • trampling 19 (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.
  • 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.
  • each blade 12 is integral with two levers 20 integral in rotation with a shaft 21 located on the axis KL and driven by a motor not shown.
  • the outlet of the blades from the core box is thus mechanized (Figure 6).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP82400383A 1981-03-13 1982-03-05 Flügelrad, Vorrichtungen und Verfahren zu dessen Herstellung durch Giessen Withdrawn EP0060760A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8105062A FR2501800A1 (fr) 1981-03-13 1981-03-13 Roue a aubes et outillages et procedes pour les fabriquer par moulage
FR8105062 1981-03-13

Publications (1)

Publication Number Publication Date
EP0060760A1 true EP0060760A1 (de) 1982-09-22

Family

ID=9256218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400383A Withdrawn EP0060760A1 (de) 1981-03-13 1982-03-05 Flügelrad, Vorrichtungen und Verfahren zu dessen Herstellung durch Giessen

Country Status (5)

Country Link
EP (1) EP0060760A1 (de)
BE (1) BE892409A (de)
FR (1) FR2501800A1 (de)
GB (1) GB2094898A (de)
IT (1) IT1157638B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105710315A (zh) * 2014-12-04 2016-06-29 北京有色金属研究总院 一种压叶轮的铸造方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19707571A1 (de) * 1997-02-26 1998-08-27 Behr Gmbh & Co Lüfterrad für ein Radialgebläse
RU2154197C2 (ru) * 1998-11-13 2000-08-10 Байбиков Александр Сергеевич Рабочее колесо центробежного насоса
US6663347B2 (en) 2001-06-06 2003-12-16 Borgwarner, Inc. Cast titanium compressor wheel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587514A (en) * 1942-09-03 1947-04-29 Power Jets Ltd Improvements relating to centrifugal compressors, pumps and the like
GB693686A (en) * 1950-01-25 1953-07-08 Power Jets Res & Dev Ltd Improvements relating to bladed rotary fluid-flow machines
US3206807A (en) * 1964-10-29 1965-09-21 Worthington Corp Method of and means for making cores for impellers of the francis type
FR2393176A1 (fr) * 1977-06-01 1978-12-29 Alsthom Atlantique Compresseur centrifuge a haut rapport de pression

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587514A (en) * 1942-09-03 1947-04-29 Power Jets Ltd Improvements relating to centrifugal compressors, pumps and the like
GB693686A (en) * 1950-01-25 1953-07-08 Power Jets Res & Dev Ltd Improvements relating to bladed rotary fluid-flow machines
US3206807A (en) * 1964-10-29 1965-09-21 Worthington Corp Method of and means for making cores for impellers of the francis type
FR2393176A1 (fr) * 1977-06-01 1978-12-29 Alsthom Atlantique Compresseur centrifuge a haut rapport de pression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VDI ZEITSCHRIFT, vol. 119, janvier 1977, DUSSELDORF (DE) H. SIMON: "Entwicklung einer Standard-Laufradreihe mit r{umlich verwundenen, r}ckw{rtsgekr}mmten Schaufeln f}r station{re Radialverdichter" pages 121-127 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105710315A (zh) * 2014-12-04 2016-06-29 北京有色金属研究总院 一种压叶轮的铸造方法

Also Published As

Publication number Publication date
IT8212448A0 (it) 1982-02-24
FR2501800A1 (fr) 1982-09-17
BE892409A (fr) 1982-09-08
GB2094898A (en) 1982-09-22
IT1157638B (it) 1987-02-18

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Legal Events

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

Free format text: ORIGINAL CODE: 0009012

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19840123

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CHADAINEAU, JOEL

Inventor name: DEGAY, MICHEL