EP0310121B1 - Procédé de fabrication de dispositifs de refoulement et/ou de direction pour machines à écoulement et impulseur radial réalisé selon ce procédé, en particulier impulseur de fluide de refroidissement pour moteurs à combustion - Google Patents

Procédé de fabrication de dispositifs de refoulement et/ou de direction pour machines à écoulement et impulseur radial réalisé selon ce procédé, en particulier impulseur de fluide de refroidissement pour moteurs à combustion Download PDF

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Publication number
EP0310121B1
EP0310121B1 EP19880116214 EP88116214A EP0310121B1 EP 0310121 B1 EP0310121 B1 EP 0310121B1 EP 19880116214 EP19880116214 EP 19880116214 EP 88116214 A EP88116214 A EP 88116214A EP 0310121 B1 EP0310121 B1 EP 0310121B1
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EP
European Patent Office
Prior art keywords
blades
blade carrier
radial
impeller
pieces
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 - Lifetime
Application number
EP19880116214
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German (de)
English (en)
Other versions
EP0310121A2 (fr
EP0310121A3 (en
Inventor
Dieter Spindelböck
Heinrich Winkelmann
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.)
Bayerische Motoren Werke AG
Winkelmann and Pannhoff GmbH
Original Assignee
Bayerische Motoren Werke AG
Winkelmann and Pannhoff GmbH
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
Priority claimed from DE19883814186 external-priority patent/DE3814186A1/de
Application filed by Bayerische Motoren Werke AG, Winkelmann and Pannhoff GmbH filed Critical Bayerische Motoren Werke AG
Publication of EP0310121A2 publication Critical patent/EP0310121A2/fr
Publication of EP0310121A3 publication Critical patent/EP0310121A3/de
Application granted granted Critical
Publication of EP0310121B1 publication Critical patent/EP0310121B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • 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
    • F04D29/2233—Construction and assembly entirely open or stamped from one sheet
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the invention is based on US Pat. No. 2,802,619.
  • the blades which are made in one piece from a sheet metal with the blade carrier, are brought into a functional position by bending or bending.
  • DE-OS 1 628 222 shows a radial impeller made of sheet metal, the blade carrier, which cooperates directly with a shaft in a rotationally fixed manner, carrying blades which are formed from sections of an outer ring region and are each angled about a straight bending edge. Point with the straight bending edges between the blade carrier and blades this has a straight course in the radial direction and a relatively short length due to the formation of sections of the outer ring region.
  • This simple design of the bucket is only sufficient for low conveying capacities.
  • the blades are also designed from sections of the integrally connected blade carrier and brought into a functional position by bending along curved bending edges. Since the blades extend from the outer blade carrier circumference limitation to the central region in order to achieve a relatively large length, there are relatively large gaps in the blade carrier between the positioned blades due to the sections of the blade carrier provided for their formation.
  • the star-like blade carrier which is connected in one piece to the blades, is arranged on a disk which can be connected in a rotationally fixed manner to a shaft.
  • the free edges of the gap boundaries of the star-shaped blade carrier running between the blades form flow losses due to eddy formation.
  • this type of construction involves a high level of production expenditure.
  • the impeller is composed of individual segments, the number of which corresponds to the number of blades.
  • Each of the segments that can be produced from sheet metal has a single piece along a boundary arranged blade on, while the other part of the segment forms a closed channel wall, which connects with its narrow side to the adjacent segment with the same contour.
  • blade carriers and blades are each formed separately, the blades being able to be optimally designed to achieve a favorable turbomachine efficiency, in particular spatially curved design.
  • a disadvantage of this known arrangement of the blades is the manufacturing and manufacturing outlay associated with the separate fixing of a blade in its two end regions.
  • the invention has for its object to develop the manufacturing method described in the preamble of claim 1 in such a way that radially flowed through conveying and / or guiding devices of turbomachines with low material expenditure and gap-free blade carrier with efficiency-optimized blades with regard to the desired shape, maximum possible length and free design the blade curvature can be produced in a simple manner with a structurally simple structure of the respective device.
  • the essence of the invention is the connecting web of each blade over such the smallest possible cross section to be tied to the blade carrier that this cross-section endures successive pivoting operations of the blade, such as, for example, bending transversely to the blade carrier and subsequent twisting of the said cross-section, for the radial positioning of the blade or the blades relative to the blade carrier in a functionally appropriate manner and additionally a relatively secure mounting of the blade or the blades in the final position or in the final positions.
  • the function of the smallest possible cross-section thus corresponds to that of a universal joint which is subject to high friction, part of which retains every spatial position at the end of a force. This is a major advantage for the automated production of a conveyor and / or guide device.
  • the smallest possible cross section is preferably formed by a one-piece connection of the connecting web to the blade carrier.
  • the blades and the blade carrier can be designed geometrically freely independently of one another in the respective manufacturing process.
  • Blades Before the blades are arranged in their smallest possible cross-sections in the blade carrier in the further manufacturing process according to a further characteristic feature of claim 1 in the blade carrier to form a radially flowed conveying and / or guiding device by successive different or spatial pivoting by means of bending and twisting the connecting webs, can they Blades can be shaped in a simple or multiple curved manner in a production-favorable sequence in an embodiment of the invention. In addition, the blades can be reinforced in the case of thin sheet metal and high stresses caused by beads.
  • the blade carrier is formed in the outer peripheral region with recesses arranged in pairs, the mutual spacing of which defines the smallest possible width of the connecting web relative to the sheet thickness.
  • the above-described, gap-free arrangement of the blades on one end face of the blade carrier offers the further advantage of the free choice of location and the type of additional connection of a blade to the blade carrier.
  • the smallest possible cross-sections of the connecting webs which are permanently deformed by bending and twisting, can serve as attachment points of the blades on the blade carrier, additional attachment points being provided in the free end regions of the blades according to a further proposal of the invention.
  • the connecting web of this in addition to the function of a universal joint subject to high friction, also serves as a holding and fixing device for each blade on the blade carrier.
  • a holding and fixing device for each blade on the blade carrier Associated with this in the automated manufacture of a conveying and / or guiding device is the advantage of a flawless mounting of each blade in the respective functional position relative to the blade carrier until the production of a further fixation located radially inward, in particular in the free blade end region.
  • a material closure achieved by welding or soldering or a form closure achieved by plug connection can serve for this purpose.
  • the smallest possible cross-sections of the connecting webs which are spaced apart in pairs in the outer circumferential area of a blade carrier, enable the blades to be positioned on an end face of the blade carrier in a gap-free arrangement, as is already described above, which is an advantageous prerequisite for fixing the blades without additional measures represented by laser welding.
  • they can only be welded in the free end region or over the blade length at further points or continuously. Since laser welding does not leave any traces of welding disturbing the flow with the gap-free arrangement of the blades, laser welding in combination with the manufacturing method according to the invention offers a radially flowed conveying and / or guiding device of a turbomachine, in particular in automated production.
  • hump pressure welding in which one or more humps are arranged along a blade in / on the blade carrier. Since the blades come into contact with the blade carrier essentially without a gap at the end of the pressure welding, the connecting web is additionally designed to be compressible for the movement of the blades during the pressure welding. This is achieved by means of recesses in the outer circumferential region of the blade carrier which are arranged in a pair and are spaced radially further inwards, the compressed connecting webs not projecting beyond the end face of the blade carrier which faces away from the blade.
  • the correct choice of the arrangements of the recesses lying radially further inward saves any reworking and also allows an impeller manufactured according to the manufacturing method according to the invention to be arranged in the flow device with the smallest possible gap.
  • the blades with a counter-holding device are formed in the free end regions with radially directed contact edges.
  • These contact edges can be radially directed boundaries of the blades or be formed in additional recesses on the suction edges of the blades.
  • the method claim 1 for the production of a radially flowed conveying and / or guiding device applies both to a disk-shaped and thus planar blade carrier as well as to a spatially, in particular conical or spherical section-shaped blade carrier.
  • a Open radial impeller of a turbomachine which is designed in accordance with requirements, can advantageously be produced inexpensively by connecting the blade carrier to a hub part of a radial impeller.
  • An advantageously simple manufacture of an open radial impeller with the least additional material expenditure is further achieved in that the blade carrier and hub part of the impeller, in particular a fluid-flow machine, are formed in one piece from sheet metal. Otherwise, the manufacturing method according to the invention is not limited to single-flow radial impellers.
  • the blades can be arranged alternately on the blade carrier in order to achieve a double-flow radial impeller.
  • the method for producing a closed radial impeller formed from only two sheet metal parts is advantageous.
  • the blade carrier with its blades forms one of the sheet metal parts, while a disk connected to a molded hub part forms the second sheet metal part.
  • the manufacturing method according to the invention can be used with regard to low manufacturing costs in that the blades are welded exclusively to the hub part disk, while the blades are welded to the cover ring of the closed radial impeller serving blade carrier only remain connected via the connecting webs.
  • the axially end regions of the blades from the hub part disk to the connecting webs can be used as free, essentially radially directed suction edges are executed. Since the blades are thus connected to the blade carrier serving as a cover ring essentially only in a punctiform manner, the punctiform connections of the connecting webs which are permanently deformed by bending and twisting in the smallest possible cross sections result in insignificant flow obstacles.
  • the blade carrier serving as a cover ring in the case of a closed radial impeller can be designed with an integrally molded suction mouth according to a partial feature of a further proposal of the invention.
  • the blade carrier thus also has the function of a carrier for the suction mouth of a closed radial impeller.
  • cutouts with radially directed contact edges are suggested in the suction edge region of the blades near the axis to train who serve the installation of counter-holding devices, in particular a welding electrode.
  • a radial impeller produced by the method according to the invention is preferably used as a coolant pump wheel, in particular a water pump wheel for internal combustion engines.
  • a coolant pump wheel in particular a water pump wheel for internal combustion engines.
  • all parts in the water flow can be made very thin-walled with sufficient strength. This results in an optimally usable delivery cross-section of the water pump wheel with simultaneously reduced flow losses due to smooth surfaces of the sheet metal parts.
  • the thus advantageously increased efficiency can serve in a redesign of a radial impeller as a water pump impeller to reduce its structural dimensions and, in conjunction therewith, for the favorable placement of the flow device on the internal combustion engine.
  • the water pump wheel is preferably made of a stainless steel sheet.
  • a further proposal of the invention is directed to radial impellers of turbomachines, the blades of which have a relatively long radial extent at a small mutual angular distance.
  • the punched-out portions are formed with radial extensions of the blades fixed in the radial direction.
  • the blades are placed transversely to the blade carrier around radial axes running through the connecting webs in such a way that the blades subsequently join can be folded over the connecting webs in front of the desired end face of the blade carrier.
  • This proposal is equally suitable for open and closed radial impellers, and also for single and double-flow wheel designs.
  • the radial blade extensions can be achieved by punching out the blades with their main extensions arranged approximately in the circumferential direction of the blade carrier.
  • a central, circular opening 2 is punched into a square piece of sheet metal 1, FIG. 1 (FIG. 2).
  • a cover ring 3 is punched out with essentially triangular blades 4, each blade 4 being connected to the cover ring 3 via a connecting web 5 (FIG. 3).
  • FIG. 4 This is then followed by an axial shaping or flanging on the inner circumference of the central opening to form a suction mouth 6 and an arcuate configuration of the blades 4, as shown in FIG. 4.
  • the blades 4 are then bent at right angles and then partially radially inward, as shown in FIG. 5 in section and FIG. 6 in plan view.
  • FIGS. 7 and 8 show a truncated cone-shaped disk 7 likewise formed from a flat piece of sheet metal with a hub 8 integrally formed thereon, with bulges 9 at equal angular intervals in the edge region of the disk 7 and on a circle 9 corresponding to the inwardly bent ends of the blades 4 are designed such that end regions 10 and 11 of the blades 4 in the position according to FIGS. 5 and 6 come to lie opposite the hump 9 when the cover ring 3 and the disk 7 are brought into contact with one another in the axial direction. Then, in this position, a hump pressure welding is carried out, whereby the water pump impeller as a closed radial impeller 14 is in the finished state, as shown in FIGS. 9 and 10.
  • cutouts 12 with radially directed edges 13 can be formed in blades 4a on the side facing away from the hub disc in the free end regions 11a, such that the welding tools applied in these free end regions 11a from the side facing away from the hub disc force the blades 4a against the can press opposing hump on the hub disc 7a, ie without the risk of slipping on the inclined edges of the blades 4a of the liberating cover ring 3a with flange 6a.
  • connection methods than the hump pressure welding method shown can also be used to connect the cover ring to the blades and the disk to the hub.
  • a hub disk 17 with a molded hub 18 is formed from a piece of sheet metal similar to FIGS. 1 and 2, with blades 19 being punched out on the outer circumference of the hub disk 17.
  • the blades 19, which are integrally connected to the disc 17 via connecting webs 20, have cutouts with their greatest radial extent, essentially in the circumferential direction of the disc 17.
  • This material-saving arrangement of the cutouts for the blades 19 is advantageous with a relatively large angular distance between the blades 19.
  • the blades 19 are designed to bend the blades at right angles, which is followed by a partially radially inward bending. If, as prescribed, the blades 19 are positioned in front of the end face 21 of the hub disk 17, the blades 19 are welded to bosses 22 of the disk 17.
  • FIG. 18 shows a closed stator 23 which can be assigned as a guide device to one of the radial impellers 14 or 16 shown in FIGS. 10 or 15 on the outflow side.
  • the stator 23 comprises an annular blade carrier 24 formed from a piece of sheet metal and having blades 25 arranged by punching on the outer circumference.
  • the straight blades 25 are arranged in a radial direction by bending and twisting the connecting webs 26.
  • Via the blades 25, a circumferential ring 27 of the same shape as the blade carrier 24 is fixedly connected to the blade carrier 24 to form the stator 23.
  • the blade carrier 29 including all blades 30 and 30 ' is punched from a flat piece of sheet metal, the aforementioned blades being arranged in one piece on the blade carrier 29 via connecting webs 31. Due to the large number of blades 30, 30 'and their relatively long radial extensions, the punched-out holes forming the blades are arranged so that the radial dimensions of the blades 30, 30' are achieved via their radial dimensions.
  • the blades 30 are transverse to the blade carrier 29 in each case according to arrow A about radial axes 32 running through the connecting webs 31 provided that the blades 30 can then be folded over the connecting webs 31 in front of the end face 33 of the blade carrier 29 according to arrow B. Then the blades 30 'through the connecting webs 31 extending radial axes 34 to the blade carrier 29 each in such a way according to arrow C that the blades 30' can then be folded over the connecting webs 31 in front of the end face 35 of the blade carrier 29. Finally, all blades 30, 30 'are firmly connected to the blade carrier 29.

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Claims (23)

  1. Procédé de fabrication de dispositifs de refoulement et/ou de direction pour machines à écoulement, procédé dans lequel :
    - les dispositifs de refoulement et/ou de direction sont réalisés avec des aubes agencées par l'intermédiaire d'entretoises radiales de liaison à la périphérie externe d'une partie en forme d'anneau ou de disque,
    - la partie servant de support des aubes, ainsi que les aubes, sont fabriquées à partir d'une tôle,
    - en outre, les entretoises de liaison sont déformées de façon permanente pour assurer le positionnement fonctionnel des aubes par rapport au support des aubes,
    procédé caractérisé
    - en ce que les entretoises de liaison sont chacune agencées sur le support des aubes par l'intermédiaire d'une section transversale aussi réduite que possible,
    - en ce que les aubes, par des pivotements successifs différents et/ou dans les trois dimensions, en courbant et en tordant les entretoises de liaison dans leur section transversale aussi réduite que possible, sont disposées dans des positions axialement voisines sur le support des aubes pour former un dispositif de refoulement et/ou de direction parcouru radialement,
  2. Procédé selon la revendication 1, caractérisé en ce que le support des aubes est muni dans sa zone périphérique externe, d'évidements disposés par paires à une certaine distance les uns des autres, et dont la distance réciproque détermine une largeur aussi réduite que possible de l'entretoise de liaison par rapport à l'épaisseur de la tôle.
  3. Procédé selon les revendications 1 et 2, caractérisé en ce que les aubes sont courbées.
  4. Procédé selon les revendications 1 à 3, caractérisé en ce que les aubes sont munies de moulures.
  5. Procédé selon les revendications 1 à 4, caractérisé en ce que les aubes sont fixées dans leurs zones terminales libres.
  6. Procédé selon la revendication 5, caractérisé en ce que les aubes sont fixées par interpénétration de matériau (soudage, brasage).
  7. Procédé selon la revendication 6, caractérisé en ce que les aubes sont fixées par soudage au laser ou bien par soudage sous pression sur bossages.
  8. Procédé selon la revendication 7, caractérisé en ce que les aubes, pour permettre le soudage avec des dispositifs d'appui (contre électrode dans le cas du soudage par pression sur bossages) sont munies dans leurs zones terminales libres, d'arêtes d'appui orientées radialement.
  9. Procédé selon la revendication 5, caractérisé en ce les aubes sont fixées par interpénétration de formes (assemblage par enfichage).
  10. Procédé selon une ou plusieurs des revendications 1 à 9, caractérisé en ce que le support des aubes est assemblé avec une partie de moyeu d'un impulseur radial.
  11. Procédé selon la revendication 10, caractérisé en ce que le support des aubes et la partie de moyeu de l'impulseur sont formés d'un seul tenant à partir d'une tôle (figures 12 à 15).
  12. Procédé selon une ou plusieurs des revendications 1 à 9, caractérisé en ce que le support des aubes est relié par l'intermédiaire des aubes avec un disque sur une partie de moyeu d'un impulseur radial (figures 1 à 11).
  13. Procédé selon une ou plusieurs des revendications 1 à 11, caractérisé en ce que :
    - dans le cas d'une faible distance angulaire réciproque et d'extension radiale relativement longue des aubes, leurs extensions radiales sont obtenues selon des découpages orientées radialement,
    - les aubes sont chacune positionnées transversalement par rapport au support des aubes autour d'axes radiaux s'étendant à travers les entretoises de liaison, de façon que les aubes puissent ensuite être rabattues devant une face frontale du support des aubes, par l'intermédiaire des entretoises de liaison (figure 19).
  14. Procédé selon la revendication 13, caractérisé en ce que les aubes sont disposées en alternance sur chacun des côtés du support des aubes (figure 20).
  15. Procédé pour la réalisation d'un impulseur radial avec un moyeu et un disque se raccordant à angle droit sur ce moyeu par une courbure, et avec un anneau de recouvrement placé en face de ce disque, tandis que des aubes sont formées entre le disque et l'anneau de recouvrement, procédé caractérisé en ce que, à partir d'une tôle plane, sont estampées d'un seul tenant, une ouverture médiane et, à partir de la zone de tôle annulaire entourant cette ouverture, les aubes en réservant des entretoises de liaison d'une section transversale aussi réduite que possible, et qu'ensuite les aubes sont façonnées puis elles sont tout d'abord recourbées à angle droit en direction du disque-moyeu autour des entretoises de liaison avec la zone de tôle de forme annulaire constituant l'anneau de recouvrement jouant le rôle de support des aubes, et elles sont ensuite courbées radialement partiellement vers l'intérieur, tandis qu'une déformation axiale est effectuée à la périphérie interne de l'ouverture médiane de l'anneau de recouvrement ou du support des aubes, et qu'ensuite, les zones terminales des aubes sont assemblées avec le disque.
  16. Impulseur radial réalisé selon une ou plusieurs des revendications 1 à 12, notamment pour des machines motrices à écoulement, avec une partie de moyeu (8) dont est solidaire en rotation un disque (7) et avec un anneau de recouvrement (3, 3a) disposé à une certaine distance axiale, et délimitant une bouche d'aspiration (6, 6a), et avec des aubes (4, 4a) disposées entre cet anneau de recouvrement et le disque (7), impulseur radial caractérisé en ce que :
    - l'anneau de recouvrement (3, 3a) avec la bouche d'aspiration (6, 6a) et les aubes (4, 4a) est constitué par une tôle d'une seule pièce (1) façonnée par estampage, mise en forme, et par courbure et torsion,
    - le disque (7) avec la partie de moyeu (8) est également formé à partir d'une pièce de tôle,
    - les deux parties en tôle sont assemblées par l'intermédiaire des zones terminales libres (10, 11), orientées radialement, des aubes (4, 4a).
  17. Impulseur radial réalisé selon la revendication 16, caractérisé en ce que les aubes (4, 4a) comportent des bords d'aspiration (15) s'étendant librement du disque-moyeu (7) jusqu'aux entretoises de liaison respectives de l'anneau de recouvrement (3, 3a) ou bien du support d'aubes placé axialement en face.
  18. Impulseur radial réalisé selon la revendication 17, caractérisé en ce que dans les zones voisines de l'axe des bords d'aspiration des aubes (4a), il est prévu des encoches (12) avec des arêtes d'appui (13) orientées radialement.
  19. Impulseur radial réalisé selon une ou plusieurs des revendications 1 à 18, caractérisé en ce qu'il est utilisé comme impulseur de fluide de refroidissement (14) pour moteurs à combustion interne.
  20. Impulseur radial réalisé selon une ou plusieurs des revendications 1 à 19, caractérisé en ce qu'une tôle ne rouillant pas est utilisée pour les parties de roues.
  21. Impulseur radial réalisé selon une ou plusieurs des revendications 1 à 19 ou 20, caractérisé en ce qu il comporte une couche de protection résistant aux fluides agressifs.
  22. Impulseur radial réalisé selon la revendication 13, caractérisé en ce qu'il est un impulseur à double flux (28) utilisé notamment comme roue de ventilateur (figures 19 et 20).
  23. Dispositif directeur réalisé selon une ou plusieurs des revendications 1 à 9, qui est associé du côté aval à un impulseur radial et qui comprend un support d'aubes (24) de forme annulaire et un anneau périphérique disposé à une certaine distance axiale, dispositif directeur caractérisé en ce que :
    - le support d'aubes (24) avec les aubes (25) est constitué à partir d'une pièce de tôle d'un seul tenant par estampage, mise en forme et par courbure et torsion,
    - le support d'aubes (24) et l'anneau périphérique (27) sont reliés ensemble par l'intermédiaire des aubes (25) (figures 16 à 18).
EP19880116214 1987-09-30 1988-09-30 Procédé de fabrication de dispositifs de refoulement et/ou de direction pour machines à écoulement et impulseur radial réalisé selon ce procédé, en particulier impulseur de fluide de refroidissement pour moteurs à combustion Expired - Lifetime EP0310121B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3732976 1987-09-30
DE3732976 1987-09-30
DE19883814186 DE3814186A1 (de) 1988-04-27 1988-04-27 Verfahren zur herstellung von foerder- und/oder leiteinrichtungen fuer stroemungsmaschinen und nach diesem verfahren hergestelltes radial-laufrad, insbesondere kuehlmittelpumpenrad fuer brennkraftmaschinen
DE3814186 1988-04-27

Publications (3)

Publication Number Publication Date
EP0310121A2 EP0310121A2 (fr) 1989-04-05
EP0310121A3 EP0310121A3 (en) 1990-01-31
EP0310121B1 true EP0310121B1 (fr) 1992-06-17

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EP19880116214 Expired - Lifetime EP0310121B1 (fr) 1987-09-30 1988-09-30 Procédé de fabrication de dispositifs de refoulement et/ou de direction pour machines à écoulement et impulseur radial réalisé selon ce procédé, en particulier impulseur de fluide de refroidissement pour moteurs à combustion

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DE (1) DE3872139D1 (fr)

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DE4008216A1 (de) * 1990-03-15 1991-09-19 Grundfos Int Verfahren zur herstellung von fluidfuehrenden einrichtungen
DE4101868A1 (de) * 1991-01-23 1992-07-30 Hilge Philipp Gmbh Laufrad fuer kreiselpumpen
DE4330098A1 (de) * 1993-09-06 1995-03-09 Klein Schanzlin & Becker Ag Als Blechformteil ausgebildete Leiteinrichtung
FR2743952B1 (fr) * 1996-01-19 2004-01-02 Valeo Equip Electr Moteur Ventilateur pour alternateur, notamment de vehicule automobile, et alternateur l'incorporant
EP0899463A1 (fr) 1997-08-26 1999-03-03 Pollmann Austria OHG Roue à aubes
DE19746850A1 (de) * 1997-10-23 1999-04-29 Wilo Gmbh Laufrad aus Blech
DE10346058A1 (de) * 2003-10-04 2005-04-21 Ksb Ag Kreiselpumpen-Leitrad
JP6115150B2 (ja) * 2013-01-24 2017-04-19 アイシン精機株式会社 流体ポンプ用インペラ及びその製造方法

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DE3872139D1 (de) 1992-07-23
EP0310121A2 (fr) 1989-04-05
EP0310121A3 (en) 1990-01-31

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