EP0061947B1 - 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
EP0061947B1
EP0061947B1 EP82400385A EP82400385A EP0061947B1 EP 0061947 B1 EP0061947 B1 EP 0061947B1 EP 82400385 A EP82400385 A EP 82400385A EP 82400385 A EP82400385 A EP 82400385A EP 0061947 B1 EP0061947 B1 EP 0061947B1
Authority
EP
European Patent Office
Prior art keywords
axis
vanes
helicoids
core
cavities
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
EP82400385A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0061947A1 (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.)
Ets Pompes Guinard Dite Ste
Original Assignee
Ets Pompes Guinard Dite Ste
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 Ets Pompes Guinard Dite Ste filed Critical Ets Pompes Guinard Dite Ste
Priority to AT82400385T priority Critical patent/ATE19813T1/de
Publication of EP0061947A1 publication Critical patent/EP0061947A1/fr
Application granted granted Critical
Publication of EP0061947B1 publication Critical patent/EP0061947B1/fr
Expired 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 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 exit the core during the preparation of the latter.
  • a paddle wheel is described, formed of a hub surrounded by a flange, which is of revolution around the axis of the hub and from which helico-centrifugal blades are created on the lower and upper surfaces parallel and admitting the axis of the hub as a repetition axis, the imaginary extension of the generatrix of the flange cutting the axis of the hub.
  • the lower and upper surfaces of the blades do not extend in their entirety along portions of helicoids whose common axis is that of the hub. It is proposed to manufacture the impellers by molding, but the layout of the blades (fig. 3) is poor, demolding is laborious, and the mold is complicated.
  • CH-A-301 112 describes a paddle wheel having excellent performance, but whose complicated layout does not allow manufacturing by molding.
  • the invention remedies these drawbacks with a helical-centrifugal impeller, 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 had at least the same performance as conventional helical-centrifugal wheels and often performance above. these last.
  • the subject of the invention is a paddle wheel, formed of a hub surrounded by a flange, which is of revolution about the axis of the hub and from which helico-centrifugal blades are created with parallel lower and upper surfaces and admitting the axis of the hub as axis of repetition, characterized in that the imaginary extension of the generatrix of the flange intersects the axis of the hub and the intrados and extrados of the blades extend in their totality according to portions of acute helicoids whose axis common is that of the hub.
  • the flange is substantially conical and the acute angle between the vector radius of a helicoid and the axis thereof is equal to the angle between the leading edge of the blade and the axis of the hub.
  • acute helicoid designates a helicoid whose angle between the vector radius and the axis of revolution is acute, instead of the vector radius being perpendicular to this axis. This keeps the entry angle exactly, which is of great hydraulic importance.
  • such a plastic impeller is easily demouldable from a mold, the molding process consisting in creating a mold whose cavities are delimited by portions of acute helicoids of the same axis, in filling these cavities with liquid plastic, hardening the plastic into a rigid part, and demolding the rigid part by imparting a helical movement around the axis of the helicoid.
  • the surface finish is integrity, just as the precision of the dimensions and the automatic demolding can be obtained by means imparting a helical movement around the axis of the helicoid to the part in the mold.
  • the process 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, allowing the metal to solidify in a part and destroying the core of sand to release the part and is characterized in that it consists in creating a core box having vanes the lower and upper surfaces of which extend along portions of acute helicoids of the same axis, fill the core box with sand, harden it sand into a core and to unmold the core of the box by imposing on the blades thereof a helical movement around their axis.
  • Fig. 6 is a sectional view of a mold incorporating a core of sand according to the invention.
  • cavities 1 of the same axis are created (only one of them is shown) XX 'of repetition in a shape 2, made of metallic material, using a electrode 3 by EDM.
  • the opposite faces of the electrode 3 extend along portions of acute helicoids of axis XX ".
  • the electrode 3 is carried by an electrode holder 4 driven, step by step, in a helical movement, of the same axis and not the same as that of the helicoids, on a screw 5 by means not shown.
  • Form 2 provided with cavities 1, and a conical cap giving a hub constitute a mold.
  • the release is carried out by giving the molded part a helical movement.
  • the extension imaginary of the generator of the flange 6 intersects the axis YY 'of the hub.
  • the intrados and extrados of the vanes 7 extend along portions of acute helicoids of axis YY ′.
  • the model plates are obtained in the conventional manner without difficulty.
  • the core box essentially consists of a box bottom 11 of a set of blades 12 and a cap 13.
  • the manufacture of the base 11 and the cap 13 is carried out without difficulty. They are turned parts.
  • the blades 12 are obtained either in resin cast in the negative, or in metal by sand molding of a model resulting from the negative.
  • trampling 19 (fig. 5).
  • This “trampling” is embedded in the bottom 11 of the box like a tenon in a mortise and will allow the setting up and dismantling 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 11a is placed between the two frames 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)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Knives (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP82400385A 1981-03-13 1982-03-05 Roue à aubes et outillages et procédés pour les fabriquer par moulage Expired EP0061947B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400385T ATE19813T1 (de) 1981-03-13 1982-03-05 Fluegelrad, vorrichtungen und verfahren zu dessen herstellung durch giessen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8105064 1981-03-13
FR8105064A FR2501802B1 (fr) 1981-03-13 1981-03-13 Roue a aubes et outillages et procedes pour les fabriquer par moulage

Publications (2)

Publication Number Publication Date
EP0061947A1 EP0061947A1 (fr) 1982-10-06
EP0061947B1 true EP0061947B1 (fr) 1986-05-14

Family

ID=9256220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400385A Expired EP0061947B1 (fr) 1981-03-13 1982-03-05 Roue à aubes et outillages et procédés pour les fabriquer par moulage

Country Status (11)

Country Link
EP (1) EP0061947B1 (enrdf_load_stackoverflow)
JP (1) JPS57168094A (enrdf_load_stackoverflow)
AT (1) ATE19813T1 (enrdf_load_stackoverflow)
BE (1) BE892411A (enrdf_load_stackoverflow)
CH (1) CH647582A5 (enrdf_load_stackoverflow)
DE (1) DE3271106D1 (enrdf_load_stackoverflow)
ES (1) ES8402395A1 (enrdf_load_stackoverflow)
FR (1) FR2501802B1 (enrdf_load_stackoverflow)
GB (1) GB2094896B (enrdf_load_stackoverflow)
GR (1) GR74748B (enrdf_load_stackoverflow)
IT (1) IT1157639B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011011574A1 (de) * 2011-02-09 2012-08-09 Voith Patent Gmbh Verfahren zum Gießen eines Schaufelrads

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63136279U (enrdf_load_stackoverflow) * 1987-02-26 1988-09-07
FR2703111B1 (fr) * 1993-03-25 1995-06-30 Ozen Sa Rotor pour pompe comportant deux pieces assemblees par soudure, obtenues par moulage par injection de materiaux thermoplastiques, et procede de fabrication d'un tel rotor .
GB9620633D0 (en) * 1996-10-03 1996-11-20 Elta Fans Ltd Improvements relating to fans
DE69941341D1 (de) * 1998-12-23 2009-10-08 Jetfan Technology Ltd Werkzeug und verfahren zur herstellung eines ventilators mit einer nabe und mehreren daran angebrachten helixförmigen blättern
US6663347B2 (en) 2001-06-06 2003-12-16 Borgwarner, Inc. Cast titanium compressor wheel
US7857577B2 (en) * 2007-02-20 2010-12-28 Schlumberger Technology Corporation System and method of pumping while reducing secondary flow effects
US20090297344A1 (en) * 2008-05-30 2009-12-03 Controlled Power Technologies Limited Rotors and manufacturing methods for rotors
CN103551521B (zh) * 2013-11-14 2015-07-29 宁夏共享集团有限责任公司 一种导向叶片铸件的铸造方法
CN103736932A (zh) * 2013-11-27 2014-04-23 江苏凯特汽车部件有限公司 一种组合式汽车铝合金车轮模芯
CN114951554B (zh) * 2022-06-07 2024-06-21 成都金顶精密铸造有限公司 一种空压机阴阳转子的浇筑模具系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378524A (en) * 1920-08-19 1921-05-17 Stanley S Turner Core-box for pistons
DE414518C (de) * 1920-10-27 1925-06-05 Cameron Steam Pump Works As Laufrad fuer Hochdruckschleuderpumpen
CH301112A (de) * 1950-10-27 1954-08-31 Maschf Augsburg Nuernberg Ag Laufrad für Zentrifugallüfter mit axialem Eintritt und radialem Austritt.
US3206807A (en) * 1964-10-29 1965-09-21 Worthington Corp Method of and means for making cores for impellers of the francis type
US3837612A (en) * 1973-06-01 1974-09-24 Red Jacket Mfg Co Mold apparatus for mixed flow impeller
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011011574A1 (de) * 2011-02-09 2012-08-09 Voith Patent Gmbh Verfahren zum Gießen eines Schaufelrads
DE102011011574B4 (de) * 2011-02-09 2015-04-02 Voith Patent Gmbh Verfahren zum Gießen eines Schaufelrads

Also Published As

Publication number Publication date
JPH0235879B2 (enrdf_load_stackoverflow) 1990-08-14
FR2501802A1 (fr) 1982-09-17
ES509988A0 (es) 1984-02-16
IT1157639B (it) 1987-02-18
GR74748B (enrdf_load_stackoverflow) 1984-07-11
FR2501802B1 (fr) 1985-06-07
EP0061947A1 (fr) 1982-10-06
JPS57168094A (en) 1982-10-16
GB2094896B (en) 1985-09-04
BE892411A (fr) 1982-09-08
ATE19813T1 (de) 1986-05-15
GB2094896A (en) 1982-09-22
DE3271106D1 (en) 1986-06-19
IT8212449A0 (it) 1982-02-24
ES8402395A1 (es) 1984-02-16
CH647582A5 (fr) 1985-01-31

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