DE3816674A1 - Method of manufacturing a centrifugal pump impeller - Google Patents
Method of manufacturing a centrifugal pump impellerInfo
- Publication number
- DE3816674A1 DE3816674A1 DE19883816674 DE3816674A DE3816674A1 DE 3816674 A1 DE3816674 A1 DE 3816674A1 DE 19883816674 DE19883816674 DE 19883816674 DE 3816674 A DE3816674 A DE 3816674A DE 3816674 A1 DE3816674 A1 DE 3816674A1
- Authority
- DE
- Germany
- Prior art keywords
- tool
- base body
- machining
- centrifugal pump
- pump impeller
- 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- Withdrawn
Links
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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/16—Working surfaces curved in two directions
- B23C3/18—Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q27/00—Geometrical mechanisms for the production of work of particular shapes, not fully provided for in another subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2215/00—Details of workpieces
- B23C2215/56—Radial turbine wheels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruches 1.The invention relates to a method according to the preamble of claim 1.
Ein nach einem derartigen Verfahren hergestelltes Laufrad ist bekannt durch die DE-PS 8 04 064. Dieses Laufrad besteht aus einer dickwandigen Metallscheibe, die mit einer Anzahl durch Bohren hergestellter Kanäle versehen ist. Die Kanäle erstrecken sich zwischen dem Umfang der Scheibe und einer zentralen Ausnehmung, sie bilden Winkel mit den Radien der Scheibe und verlaufen tangential zur Außenwand der Ausnehmung. Das Verfahren zur Herstellung eines solchen Laufrades ist wenig aufwendig. Der hydraulische Wirkungsgrad dieses Laufrades ist allerdings gering.An impeller manufactured by such a method is known from DE-PS 8 04 064. This impeller exists from a thick-walled metal disc, with a number channels provided by drilling is provided. The canals extend between the circumference of the disc and one central recess, they form angles with the radii of the Disc and run tangential to the outer wall of the recess. The process for making such an impeller is not very expensive. The hydraulic efficiency of this Impeller is however small.
Um den Wirkungsgrad eines mit mechanisch eingearbeiteten Bohrungen versehenen Laufrades zu verbessern, wurde bereits vorgeschlagen, daß in jede der zwischen dem Umfang und der zentralen Ausnehmung des Laufrades verlaufende Hauptbohrung eine oder mehrere Nebenbohrungen münden, deren Mittellinien Kreise tangieren, die größer sind als der Außendurchmesser des Laufradsaugmundes (DE-PS 12 49 693). Auch hier handelt es sich um Bohrungen, deren hydraulischer Wirkungsgrad noch erheblich von dem einer Kreiselpumpenschaufel abweicht, die nach einem der heute üblichen Verfahren hergestellt ist. Eine derartige Schaufel ist bogenförmig ausgeführt, um eine möglichst gute Anpassung an die hydraulischen Gegebenheiten in einer Kreiselpumpe zu erreichen.To the efficiency of a mechanically incorporated It has already been done to improve the bore of the impeller suggested that in each of the between the scope and the central recess of the impeller running main bore one or more secondary holes open, the center lines Tangle circles that are larger than the outside diameter the impeller suction mouth (DE-PS 12 49 693). Here too are bores, their hydraulic Efficiency considerably higher than that of a centrifugal pump blade deviates, according to one of the usual procedures today is made. Such a blade is arched designed to adapt to the hydraulic as well as possible To achieve conditions in a centrifugal pump.
Die Herstellung der den hydraulischen Erfordernissen besser angepaßten Laufräder mit gebogenen Schaufeln erforderte aber einen besonderen Aufwand. Die bisher noch am häufigsten eingesetzten Fertigungsverfahren sind das Gießen, soweit es sich um Metallaufräder handelt, und das Spritzgießen, wenn die Laufräder aus Kunststoff gefertigt werden. Wegen des hohen Aufwandes für die Gieß- und Spritzeinrichtungen sind diese Verfahren allerdings nur bei hohen Stückzahlen lohnend. Es kommt hinzu, daß verschiedene Werkstoffe nicht oder nur mit Einschränkungen mit Hilfe dieser Verfahren zu verarbeiten sind. So kann beispielsweise der Werkstoff Polytetrafluorethylen (PTFE), der durch isostatisches Pressen und Sintern zu verarbeiten ist, bisher nur in vergleichsweise massive Formen gebracht werden. Die filigrane Form dünner Laufradschaufeln kann bei PTFE nicht mit Hilfe der herkömmlichen Verfahren verwirklicht werden.The production of the hydraulic requirements better adapted impellers with curved blades required a special effort. The most common so far Manufacturing processes used are casting as far as it is are metal wheels, and injection molding if the impellers are made of plastic. Because of the are high expenditure for the pouring and spraying devices however, this procedure is only worthwhile for large quantities. In addition, different materials do not or only to process with restrictions using these procedures are. For example, the material polytetrafluoroethylene (PTFE) by isostatic pressing and sintering has been processed so far only in comparatively massive forms to be brought. The filigree shape of thin impeller blades cannot with PTFE using the conventional methods be realized.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung eines Kreiselpumpenlaufrades aus einem massiven Grundkörper zu entwickeln, mit dessen Hilfe auch gebogene und somit relativ dünne Laufradschaufeln zu verwirklichen sind.The invention has for its object a method for Manufacture of a centrifugal pump impeller from a solid To develop basic body, with the help of which curved and thus to realize relatively thin impeller blades are.
Die gestellte Aufgabe wird erfindungsgemäß durch ein im Anspruch 1 näher gekennzeichnetes Verfahren gelöst. Die Unteransprüche nennen vorteilhafte Ausgestaltungen dieses Verfahrens.The object is achieved by an im Solved claim 1 characterized method. The Subclaims call advantageous embodiments of this Procedure.
Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt in schematisierter Form die Herstellung eines Kreiselpumpenlaufrades aus einem - in der Vorderansicht dargestellten - massiven Grundkörper.The invention will be explained in more detail using an exemplary embodiment explained. The drawing shows the in a schematic form Production of a centrifugal pump impeller from one - in the Front view shown - massive body.
Der Grundkörper (1) ist bereits mit einer zentralen Ausnehmung (2) versehen, die beim fertigen Kreiselpumpenlaufrad den Einlauf bilden wird. In einem ersten Arbeitsgang werden nun Bohrungen (3) eingebracht, wie sie von den als vorbekannt geschilderten Laufrädern her bereits bekannt sind. Mit einem Zylinderfräser (4) wird nun die der Bildung von Schaufeln (5) und Förderkanälen (6) dienende Feinarbeit geleistet. The base body ( 1 ) is already provided with a central recess ( 2 ) which will form the inlet in the finished centrifugal pump impeller. In a first operation, bores ( 3 ) are now made, as are already known from the impellers described as previously known. With a cylinder milling cutter ( 4 ), the fine work that serves to form blades ( 5 ) and delivery channels ( 6 ) is now carried out.
Zur Verdeutlichung des Verfahrensablaufs ist der Fräser (4) in vier Positionen dargestellt, die er während des Herstellungsverfahrens nacheinander durchläuft. Die Positionsänderung des Fräsers (4) gegenüber dem Grundkörper (1) erfolgt fortlaufend, so daß glattwandige Schaufeln (5) entstehen. Während der Fräser (4) beim Bearbeitungsvorgang von innen nach außen verschoben wird, wird der Grundkörper (1) mit einer an den Vorschub des Fräsers (4) angepaßten Bewegung kontinuierlich gedreht.To illustrate the process sequence, the milling cutter ( 4 ) is shown in four positions, which it passes through one after the other during the production process. The position of the milling cutter ( 4 ) relative to the base body ( 1 ) is continuous, so that smooth-walled blades ( 5 ) are created. While the milling cutter ( 4 ) is shifted from the inside to the outside during the machining process, the base body ( 1 ) is continuously rotated with a movement adapted to the feed of the milling cutter ( 4 ).
Die Herstellung der Schaufeln (5) durch den innerhalb des Förderkanales (6) bewegten Fräser (4) kann, je nach Breite und Verlauf des Förderkanales (6), in einem oder in mehreren Schritten erfolgen. Bei einer in mehreren Schritten ablaufenden Herstellung eines konischen Förderkanales (6) ändert der Fräser (4) seine meridionale Neigung zur Achse des Förderkanales (6) während der Bearbeitungsvorgänge.The blades ( 5 ) can be produced in one or more steps by the milling cutter ( 4 ) moved within the conveying channel ( 6 ), depending on the width and course of the conveying channel ( 6 ). When a conical conveyor channel ( 6 ) is produced in several steps, the milling cutter ( 4 ) changes its meridional inclination to the axis of the conveyor channel ( 6 ) during the machining operations.
Zur Durchführung des erfindungsgemäßen Verfahrens können Bohrer, Fräser oder in vorteilhafter Weise auch kombinierte Bohrfräser verwendet werden. Das Verfahren läßt sich grundsätzlich bei allen für Laufräder geeigneten Werkstoffen anwenden.To carry out the method according to the invention Drill bits, milling cutters or advantageously also combined Drill cutters are used. The procedure can be basically for all materials suitable for impellers apply.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883816674 DE3816674A1 (en) | 1988-05-17 | 1988-05-17 | Method of manufacturing a centrifugal pump impeller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883816674 DE3816674A1 (en) | 1988-05-17 | 1988-05-17 | Method of manufacturing a centrifugal pump impeller |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3816674A1 true DE3816674A1 (en) | 1989-11-23 |
Family
ID=6354484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19883816674 Withdrawn DE3816674A1 (en) | 1988-05-17 | 1988-05-17 | Method of manufacturing a centrifugal pump impeller |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3816674A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1683597A1 (en) * | 2005-01-20 | 2006-07-26 | Nuovo Pignone S.P.A. | Method of processing a semi-finished product for the production of a rotor with integral blades |
US7305762B2 (en) * | 2002-09-03 | 2007-12-11 | General Electric Company | Method for production of a rotor of a centrifugal compressor |
US7517193B2 (en) | 2004-03-23 | 2009-04-14 | Mitsubishi Heavy Industries, Ltd. | Centrifugal compressor and manufacturing method for impeller |
CN104500452A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院工程热物理研究所 | Vaneless diffusion section structure with regular N-prism side outlet and machining method |
CN106624667A (en) * | 2017-02-10 | 2017-05-10 | 大连理工大学 | Double-row grooving plunge milling method of integral impeller |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE195747C (en) * | 1905-12-10 | 1908-02-24 | Neumann Fritz | IMPELLERS OF CENTRIFUGAL PUMPS WHICH BLADES ARE CURVED AND THE INLET LIFT IS GREATER THAN THE OUTLET |
US2429324A (en) * | 1943-12-30 | 1947-10-21 | Meisser Christian | Rotor for centrifugal compressors |
DE804064C (en) * | 1944-03-01 | 1951-04-16 | Apv Co Ltd | Impeller for centrifugal pumps, especially for conveying milk |
US2662450A (en) * | 1948-11-26 | 1953-12-15 | Thompson Prod Inc | Machine for milling impeller wheels |
US2962941A (en) * | 1955-08-03 | 1960-12-06 | Avco Mfg Corp | Apparatus for producing a centrifugal compressor rotor |
-
1988
- 1988-05-17 DE DE19883816674 patent/DE3816674A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE195747C (en) * | 1905-12-10 | 1908-02-24 | Neumann Fritz | IMPELLERS OF CENTRIFUGAL PUMPS WHICH BLADES ARE CURVED AND THE INLET LIFT IS GREATER THAN THE OUTLET |
US2429324A (en) * | 1943-12-30 | 1947-10-21 | Meisser Christian | Rotor for centrifugal compressors |
DE804064C (en) * | 1944-03-01 | 1951-04-16 | Apv Co Ltd | Impeller for centrifugal pumps, especially for conveying milk |
US2662450A (en) * | 1948-11-26 | 1953-12-15 | Thompson Prod Inc | Machine for milling impeller wheels |
US2962941A (en) * | 1955-08-03 | 1960-12-06 | Avco Mfg Corp | Apparatus for producing a centrifugal compressor rotor |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7305762B2 (en) * | 2002-09-03 | 2007-12-11 | General Electric Company | Method for production of a rotor of a centrifugal compressor |
US7517193B2 (en) | 2004-03-23 | 2009-04-14 | Mitsubishi Heavy Industries, Ltd. | Centrifugal compressor and manufacturing method for impeller |
EP1683597A1 (en) * | 2005-01-20 | 2006-07-26 | Nuovo Pignone S.P.A. | Method of processing a semi-finished product for the production of a rotor with integral blades |
US7784181B2 (en) | 2005-01-20 | 2010-08-31 | Nuovo Pignone S.P.A. | Processing method of a semi-processed product for the production of a rotor equipped with a series of blades integral therewith |
CN104500452A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院工程热物理研究所 | Vaneless diffusion section structure with regular N-prism side outlet and machining method |
CN106624667A (en) * | 2017-02-10 | 2017-05-10 | 大连理工大学 | Double-row grooving plunge milling method of integral impeller |
CN106624667B (en) * | 2017-02-10 | 2019-01-15 | 大连理工大学 | A kind of slotting milling method of integral wheel biserial fluting |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8136 | Disposal/non-payment of the fee for publication/grant |