EP0310121A2 - 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 PDFInfo
- Publication number
- EP0310121A2 EP0310121A2 EP88116214A EP88116214A EP0310121A2 EP 0310121 A2 EP0310121 A2 EP 0310121A2 EP 88116214 A EP88116214 A EP 88116214A EP 88116214 A EP88116214 A EP 88116214A EP 0310121 A2 EP0310121 A2 EP 0310121A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- blades
- blade carrier
- radial
- sheet metal
- connecting webs
- 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.)
- Granted
Links
Images
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 is associated with a high manufacturing outlay.
- 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, in particular spatially, to achieve a favorable fluid machine efficiency 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 further develop the manufacturing method described in the preamble of claim 1 such that radially flowed conveying and / or guiding devices of turbomachines with low material costs 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.
- 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 by the manufacturing method according to the invention to be arranged in the flow device with the smallest possible gap.
- the blades with 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 according to a partial feature of a further proposal of the invention with an integrally molded suction mouth.
- 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, as well as 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 manner 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
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 true EP0310121A2 (fr) | 1989-04-05 |
EP0310121A3 EP0310121A3 (en) | 1990-01-31 |
EP0310121B1 EP0310121B1 (fr) | 1992-06-17 |
Family
ID=25860326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0310121B1 (fr) |
DE (1) | DE3872139D1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4008216A1 (de) * | 1990-03-15 | 1991-09-19 | Grundfos Int | Verfahren zur herstellung von fluidfuehrenden einrichtungen |
EP0496084A1 (fr) * | 1991-01-23 | 1992-07-29 | Philipp Hilge GmbH | Rouet pour pompes centrifuges |
DE4330098A1 (de) * | 1993-09-06 | 1995-03-09 | Klein Schanzlin & Becker Ag | Als Blechformteil ausgebildete Leiteinrichtung |
FR2743952A1 (fr) * | 1996-01-19 | 1997-07-25 | 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 |
EP0911528A1 (fr) * | 1997-10-23 | 1999-04-28 | WILO GmbH | Rouet en tÔle |
EP1520992A2 (fr) * | 2003-10-04 | 2005-04-06 | KSB Aktiengesellschaft | Diffuseur pour une pompe rotatoire |
JP2014141944A (ja) * | 2013-01-24 | 2014-08-07 | Aisin Seiki Co Ltd | 流体ポンプ用インペラ及びその製造方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE368563C (de) * | 1923-02-06 | Adolf Gustav Von Loewe Dipl In | Aus einem Stueck Blech gestanzter und gepresster Schaufelkranz fuer Lauf- und Leitraeder von Turbinen und Turbogeblaesen | |
US2117011A (en) * | 1935-02-27 | 1938-05-10 | Ward E Pratt | Centrifugal pump |
US2662686A (en) * | 1952-04-18 | 1953-12-15 | Edmund E Hans | Fan wheel |
US2802615A (en) * | 1953-01-02 | 1957-08-13 | Waldorf Paper Prod Co | Can cartons |
EP0303924A2 (fr) * | 1987-08-10 | 1989-02-22 | Alcatel SEL Aktiengesellschaft | Roue-ventilateur fabriquée d'un disque de tôle et sa méthode de fabrication |
-
1988
- 1988-09-30 DE DE8888116214T patent/DE3872139D1/de not_active Expired - Lifetime
- 1988-09-30 EP EP19880116214 patent/EP0310121B1/fr not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE368563C (de) * | 1923-02-06 | Adolf Gustav Von Loewe Dipl In | Aus einem Stueck Blech gestanzter und gepresster Schaufelkranz fuer Lauf- und Leitraeder von Turbinen und Turbogeblaesen | |
US2117011A (en) * | 1935-02-27 | 1938-05-10 | Ward E Pratt | Centrifugal pump |
US2662686A (en) * | 1952-04-18 | 1953-12-15 | Edmund E Hans | Fan wheel |
US2802615A (en) * | 1953-01-02 | 1957-08-13 | Waldorf Paper Prod Co | Can cartons |
EP0303924A2 (fr) * | 1987-08-10 | 1989-02-22 | Alcatel SEL Aktiengesellschaft | Roue-ventilateur fabriquée d'un disque de tôle et sa méthode de fabrication |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4008216A1 (de) * | 1990-03-15 | 1991-09-19 | Grundfos Int | Verfahren zur herstellung von fluidfuehrenden einrichtungen |
EP0496084A1 (fr) * | 1991-01-23 | 1992-07-29 | Philipp Hilge GmbH | Rouet pour pompes centrifuges |
DE4330098A1 (de) * | 1993-09-06 | 1995-03-09 | Klein Schanzlin & Becker Ag | Als Blechformteil ausgebildete Leiteinrichtung |
EP0646729A1 (fr) * | 1993-09-06 | 1995-04-05 | KSB Aktiengesellschaft | Diffuseur en forme de pièce en tôle |
FR2743952A1 (fr) * | 1996-01-19 | 1997-07-25 | 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 |
EP0911528A1 (fr) * | 1997-10-23 | 1999-04-28 | WILO GmbH | Rouet en tÔle |
EP1520992A2 (fr) * | 2003-10-04 | 2005-04-06 | KSB Aktiengesellschaft | Diffuseur pour une pompe rotatoire |
EP1520992A3 (fr) * | 2003-10-04 | 2005-07-27 | KSB Aktiengesellschaft | Diffuseur pour une pompe rotatoire |
JP2014141944A (ja) * | 2013-01-24 | 2014-08-07 | Aisin Seiki Co Ltd | 流体ポンプ用インペラ及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
DE3872139D1 (de) | 1992-07-23 |
EP0310121B1 (fr) | 1992-06-17 |
EP0310121A3 (en) | 1990-01-31 |
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