WO2004053333A1 - Screw pump - Google Patents

Screw pump Download PDF

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Publication number
WO2004053333A1
WO2004053333A1 PCT/DE2003/003488 DE0303488W WO2004053333A1 WO 2004053333 A1 WO2004053333 A1 WO 2004053333A1 DE 0303488 W DE0303488 W DE 0303488W WO 2004053333 A1 WO2004053333 A1 WO 2004053333A1
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WO
WIPO (PCT)
Prior art keywords
connection
module
conveying
housing module
housing
Prior art date
Application number
PCT/DE2003/003488
Other languages
German (de)
French (fr)
Inventor
Klaus Renzelmann
Weshen Christov
Original Assignee
Joh. Heinr. Bornemann 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32477556&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2004053333(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Joh. Heinr. Bornemann Gmbh filed Critical Joh. Heinr. Bornemann Gmbh
Priority to EP03812553A priority Critical patent/EP1570180B1/en
Priority to AU2003302806A priority patent/AU2003302806A1/en
Priority to DE50309747T priority patent/DE50309747D1/en
Publication of WO2004053333A1 publication Critical patent/WO2004053333A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a two-spindle screw pump in a single-flow design, with an external bearing of the two screw spindles, a pump housing enclosing at least the two screw spindles and thereby forming the delivery chambers required for the pumping process, an inlet-side connection leading into a suction chamber for the delivery medium to be drawn in, and an outlet , with a pressure chamber connected connection for a pressure delivery line for the medium to be discharged.
  • FIG. 1 A previously known embodiment of this type is shown in FIG. 1 as prior art. Due to its self-priming and low-shear conveying characteristics, this design is becoming increasingly popular in conveying processes with valuable and / or shear-sensitive conveying products such as food or chemicals. In contrast to the widespread double-flow design, the single-flow design enables the pump's product space to be opened quickly, easily and completely for cleaning and disinfection purposes.
  • the product space is essentially formed by the pump housing, which has various tasks: Enclosing the screw spindles to form the delivery chambers required for the pumping process;
  • polishing processes on conventional cast metal housings are generally questionable.
  • connection piece shapes are common, which also vary regionally (e.g. due to local regulations). Twenty different connection sockets for a pump type are not uncommon depending on the industry and regional use. With one-piece cast metal housings, the storage costs increase enormously due to the variety of variants.
  • the object of the invention is to develop a more economical design for the two-spindle screw pump described at the outset, which also enables testable and documentable cleaning or sterilization processes and an increase in the wear resistance of the pump housing in the area surrounding the screw spindles.
  • connection module an exchangeable inlet or outlet connection housing module
  • conveyor housing module which forms a parting line and which has its inner circumferential surface delimits the delivery chambers on the outside
  • connection module running perpendicular to the spindle axes through the suction chamber or pressure chamber cross section.
  • a three-part pump housing is particularly advantageous because it creates the best conditions for eliminating the above-mentioned problems and thus for solving the above-mentioned task.
  • the conveyor housing module can thus consist of a solid metal blank with subsequent machining, or it can be welded together as a welded part from commercially available semi-finished products, such as pipe sections and plates, and then machined.
  • the housing area surrounding the conveyor screws can be optimally adapted to the requirements of the conveyor process.
  • the inner surface of this housing area can be polished using suitable methods and the surface quality can be properly checked.
  • Optimized wear protection layers can be reliably implemented, e.g. through structural changes, diffusion processes, applied wear protection layers or inserts made of solid industrial ceramics.
  • Metal investment casting or sheet metal formed parts are suitable for the inlet and outlet connection housing modules, since both the surface requirements in the conveying process and the strength requirements can be met by introducing force via pipes in the conveyor system.
  • connection modules for integrating the screw pump into a conveyor system
  • Connection pieces can either be made using the primary molding process (investment casting) can be cast on directly or subsequently welded on using a suitable process. For this purpose, it is expedient if a suitable preparation for the subsequent welding of a connecting piece is implemented in the inlet and / or outlet connection housing module.
  • FIG. 2 in a representation according to Figure 1, a two-spindle screw pump according to the invention.
  • each is a two-spindle screw pump with external bearing in a single-flow design.
  • the pump housing 3 has an inlet-side connection 6 leading into a suction chamber 5 for the delivery medium to be sucked in, symbolized by an arrow 7, and furthermore has a connection 9 for a connection to a pressure chamber 8 Pressure delivery line for the delivery medium to be discharged, symbolized by an arrow 10.
  • the pump housing 3 enclosing the two screw spindles 1, 2 forms the delivery chambers 11 required for the pumping process, which, when the screw spindles 1, 2 rotate, conveys the pumped medium from the suction chamber 5 into the pressure chamber 8. Since there is only this one flow direction for the pumped medium, one speaks of a single-flow design.
  • FIG. 2 which shows an embodiment of the invention, for example, the components that correspond to FIG. 1 are provided with the same reference numerals. So it is also a two-spindle screw pump with external bearings in a single-flow design;
  • the pump housing 3 which is constructed in three parts, is designed differently. That part of the pump housing which directly surrounds the screw spindles 1, 2 and thereby forms the delivery chambers 11 required for the pumping process and delimits them radially on the outside with its inner circumferential surface 1 2a is designed as a delivery housing module 122, on the one of which (in FIG left) end face an interchangeable inlet connection housing module 13 and on the other (right in FIG. 2) end face an interchangeable outlet
  • Connection housing module 14 are flanged.
  • the joints 1 5, 1 6 formed on each of the two end faces of the conveyor housing module 1 2 with a connection module 1 3 or 1 4 each run perpendicular to the spindle axes 1 7, 18 through the suction chamber 5 or pressure chamber 8 cross section.
  • Each of the two connection modules 13, 14 is provided with a connection piece 19, 20, which are used to integrate the screw pump into a conveyor system (not shown in more detail) and either cast directly in the master molding process (investment casting) or subsequently welded on using a suitable process.

Abstract

The invention relates to a single-flow type two-spindle screw pump comprising an outer bearing (4) for the two spindles (1, 2), a pump housing (3) that encloses at least the two spindles (1, 2) and thereby forms the conveying chambers (11) required for the pumping process, a connection (6) for the conveying medium that is to be aspirated (arrow 7), said connection (6) being located at the inlet end and extending into a suction chamber (5), and a connection (9) for a pressure-delivering line used for the conveying medium that is to be discharged (arrow 10), said connection (9) being connected to a pressure chamber (8). At least one of the two inventive connections (6, 9) is part of a removable inlet connection housing module or outlet connection housing module (13 or 14, henceforth referred to as connection module ) which is flanged to a conveying housing module (12) so as to form a parting line (15, 16). The inner shell surface (12a) of the conveying housing module (12) delimits the outside of the conveying chambers (11). The parting lines (15, 16) between the conveying housing module (12) and the connection module (13, 14) extend perpendicular to the spindle axes (17, 18) through the cross section of the suction chamber (5) or pressure chamber (8).

Description

SchraubenspindelpumpeScrew Pump
Die Erfindung betrifft eine zweispindelige Schraubenspindelpumpe in einflutiger Bauweise, mit einer Außenlagerung der beiden Schraubenspindeln, einem zumindest die beiden Schraubenspindeln umschließenden und hierdurch die für den Pumpprozess erforderlichen Förderkammern bildenden Pumpengehäuse, einem einlassseitigen, in einen Saugraum führenden Anschluss für das anzusaugende Fördermedium, und einem auslassseitigen, mit einem Druckraum in Verbindung stehenden Anschluss für eine Druckförderleitung für das abzuführende Fördermedium.The invention relates to a two-spindle screw pump in a single-flow design, with an external bearing of the two screw spindles, a pump housing enclosing at least the two screw spindles and thereby forming the delivery chambers required for the pumping process, an inlet-side connection leading into a suction chamber for the delivery medium to be drawn in, and an outlet , with a pressure chamber connected connection for a pressure delivery line for the medium to be discharged.
Eine vorbekannte Ausführungsform dieser Bauart ist in Figur 1 als Stand der Technik dargestellt. Diese Bauweise erfreut sich aufgrund ihrer selbstansaugenden und scherarmen Fördercharakteristik zunehmender Beliebtheit in Förderprozessen mit wertvollen und/oder scherempfindlichen Förderprodukten wie Lebensmitteln oder Chemikalien. Im Gegensatz zu der weit verbreiteten zweiflutigen Bauweise ermöglicht die einflutige Bauweise ein schnelles, einfaches und vollständiges Öffnen des Produktraumes der Pumpe zu Reinigungsund Desinfektionszwecken. Dabei wird der Produktraum im Wesentlichen vom Pumpengehäuse gebildet, dem verschiedene Aufgaben zukommen: Umschließen der Schraubenspindeln zur Bildung der für den Pumpprozess erforderlichen Förderkammern;A previously known embodiment of this type is shown in FIG. 1 as prior art. Due to its self-priming and low-shear conveying characteristics, this design is becoming increasingly popular in conveying processes with valuable and / or shear-sensitive conveying products such as food or chemicals. In contrast to the widespread double-flow design, the single-flow design enables the pump's product space to be opened quickly, easily and completely for cleaning and disinfection purposes. The product space is essentially formed by the pump housing, which has various tasks: Enclosing the screw spindles to form the delivery chambers required for the pumping process;
- Bereitstellung von ein- und auslassseitigen Anschlüssen zur- Provision of connections on the inlet and outlet side
Einbindung der Pumpe in eine Förderanlage;Integration of the pump in a conveyor system;
bestimmungsgemäßes Aufnehmen des Förderproduktes.intended picking up of the conveyed product.
Diese Pumpengehäuse für Schraubenspindelpumpen der verschiedenen Bauarten werden üblicherweise als einteilige Metallgussteile hergestellt. Dies ist für die Förderung von Mineralölprodukten völlig ausreichend, erweist sich jedoch zur Förderung von Lebensmitteln oder Chemikalien als problematisch, da Oberfläche und Struktur von Metallgussteilen in der Regel so große Fehlstellen und Unreinheiten aufweisen, dass entweder das Förderprodukt selbst oder aber der Reinigungs- oder Sterilisierungsprozess gefährdet werden.These pump housings for screw pumps of various types are usually manufactured as one-piece metal castings. This is completely sufficient for the extraction of mineral oil products, but proves to be problematic for the extraction of food or chemicals, since the surface and structure of metal castings generally have such large defects and impurities that either the extraction product itself or the cleaning or sterilization process be endangered.
Es sind zwar verschiedene Polierverfahren üblich, aber das Ergebnis derartiger Bearbeitungsmethoden ist aufgrund der komplexen Gehäusekonfiguration nur schlecht prüf- und dokumentierbar. Damit erweisen sich Polierverfahren an herkömmlichen Metallgussgehäusen insgesamt als zweifelhaft.Different polishing methods are common, but the result of such processing methods is difficult to test and document due to the complex housing configuration. This means that polishing processes on conventional cast metal housings are generally questionable.
Durch das Herstellverfahren weisen herkömmliche Metallgussgehäuse eine einheitliche Materialstruktur auf, die nur einen verhältnismäßig schlechten Kompromiss zur Erfüllung der oben genannten, dem Pumpengehäuse zukommenden Hauptaufgaben darstellen. Als besonderer Schwachpunkt hat sich dabei der Gehäusebereich herausgestellt, der die Schraubenspindeln umschließt, da die übliche Materialstruktur eines Metallgussgehäuses nur eine sehr geringe Verschleißfestigkeit aufweist. Ein Vergütungs- oder Härtegefüge oder aber eine lokale Verschleißschutzbeschichtung sind bei Förderung von nicht schmierenden oder gar abrasiven Medien zwar wünschenswert, jedoch für einteilige Metallgussgehäuse nur schwer realisierbar.Due to the manufacturing process, conventional cast metal housings have a uniform material structure, which is only a relatively poor compromise for fulfilling the above-mentioned main tasks for the pump housing. The housing area surrounding the screw spindles has proven to be a particular weak point, since the usual material structure of a cast metal housing is only very slight Has wear resistance. A tempering or hardness structure or a local wear protection coating is desirable when conveying non-lubricating or even abrasive media, but is difficult to achieve for one-piece metal cast housings.
Bei der Einbindung einer Schraubenspindelpumpe in branchenspezifische Förderanlagen (z.B. in der Lebensmittel- oder Chemiebranche) sind unterschiedliche Anschlussstutzenformen üblich, die zudem noch regional (z.B. durch lokale Vorschriften) variieren. Dabei sind zwanzig unterschiedliche Anschlussstutzen für einen Pumpentyp je nach Branche und regionaler Verwendung keine Seltenheit. Bei einteiligen Metallgussgehäusen steigen dadurch die Bevorratungskosten aufgrund der Variantenvielfalt enorm.When integrating a screw pump into industry-specific conveyor systems (e.g. in the food or chemical industry), different connection piece shapes are common, which also vary regionally (e.g. due to local regulations). Twenty different connection sockets for a pump type are not uncommon depending on the industry and regional use. With one-piece cast metal housings, the storage costs increase enormously due to the variety of variants.
Der Erfindung liegt die Aufgabe zugrunde, für die eingangs beschriebene zweispindelige Schraubenspindelpumpe eine kostengünstigere Bauform zu entwickeln, die zudem prüf- und dokumentierbare Reinigungs- oder Sterilisierungsprozesse sowie eine Erhöhung der Verschleißfestigkeit des Pumpengehäuses in dem die Schraubenspindeln umschließenden Bereich ermöglicht.The object of the invention is to develop a more economical design for the two-spindle screw pump described at the outset, which also enables testable and documentable cleaning or sterilization processes and an increase in the wear resistance of the pump housing in the area surrounding the screw spindles.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass zumindest einer der beiden Anschlüsse Teil eines auswechselbaren Einlass- bzw. Auslass-Anschluss-gehäuse-moduls ist (nachfolgend zusammenfassend "Anschlussmodul"), das unter Bildung einer Trennfuge an ein Fördergehäusemodul angeflanscht ist, das mit seiner inneren Mantelfläche die Förderkammern außen begrenzt, wobei die Trennfugen zwischen Fördergehäusemodul und Anschlussmodul senkrecht zu den Spindelachsen durch den Saugraum- bzw. Druckraum-Querschnitt hindurch verlaufen. Besonders vorteilhaft ist ein dreiteiliges Pumpengehäuse, das die besten Voraussetzungen zur Behebung der vorstehend genannten Probleme und somit zur Lösung der genannten Aufgabe schafft.This object is achieved according to the invention in that at least one of the two connections is part of an exchangeable inlet or outlet connection housing module (hereinafter collectively "connection module") which is flanged to a conveyor housing module which forms a parting line and which has its inner circumferential surface delimits the delivery chambers on the outside, the separating joints between the delivery housing module and the connection module running perpendicular to the spindle axes through the suction chamber or pressure chamber cross section. A three-part pump housing is particularly advantageous because it creates the best conditions for eliminating the above-mentioned problems and thus for solving the above-mentioned task.
Werkstoffe, Herstellverfahren und Oberflächengestaltungen können unter Berücksichtigung der spezifischen Prozessanforderungen ausgewählt werden. Dabei bieten sich für das Fördergehäusemodul Metall-, Feinguss-, Schmiede- oder auch Formteile aus massiver Industriekeramik an. Das Fördergehäusemodul kann somit aus einem massiven Metallrohling mit anschließender Zerspanung bestehen oder aber als Schweißteil aus handelsüblichen Halbzeugen, wie Rohrabschnitten und Platten zusammengeschweißt und anschließend mechanisch bearbeitet werden. Dadurch kann der die Förderschrauben umschließende Gehäusebereich optimal auf die Anforderungen aus dem Förderprozess angepasst werden. So kann die innere Mantelfläche dieses Gehäusebereichs mit geeigneten Methoden poliert und die Oberflächenqualität ordnungsgemäß geprüft werden. Zuverlässig realisierbar sind optimierte Verschleißschutzschichten z.B. durch Gefügeveränderungen, Diffusionsverfahren, auftragende Verschleißschutzschichten oder Einsätze aus massiver Industriekeramik.Materials, manufacturing processes and surface designs can be selected taking into account the specific process requirements. Metal, investment cast, forged or molded parts made of solid industrial ceramics are suitable for the conveyor housing module. The conveyor housing module can thus consist of a solid metal blank with subsequent machining, or it can be welded together as a welded part from commercially available semi-finished products, such as pipe sections and plates, and then machined. As a result, the housing area surrounding the conveyor screws can be optimally adapted to the requirements of the conveyor process. The inner surface of this housing area can be polished using suitable methods and the surface quality can be properly checked. Optimized wear protection layers can be reliably implemented, e.g. through structural changes, diffusion processes, applied wear protection layers or inserts made of solid industrial ceramics.
Für die Einlass- und Auslass-Anschlussgehäusemodule bieten sich Metall-Feinguss oder Blech-Umformteile an, da hiermit sowohl die Oberflächenanforderungen im Förderprozess als auch die Festigkeitsanforderungen durch Krafteinleitung über Rohrleitungen in der Förderanlage erfüllt werden können.Metal investment casting or sheet metal formed parts are suitable for the inlet and outlet connection housing modules, since both the surface requirements in the conveying process and the strength requirements can be met by introducing force via pipes in the conveyor system.
Etwaige, an den Anschlussmodulen zur Einbindung der Schraubenspindelpumpe in eine Förderanlage vorgeseheneAny provided on the connection modules for integrating the screw pump into a conveyor system
Anschlussstutzen können entweder im Urformverfahren (Feinguss) direkt angegossen werden oder durch ein geeignetes Verfahren nachträglich angeschweißt werden. Hierfür ist es zweckmäßig, wenn im Einlass- und/oder Auslass-Anschlussgehäusemodul eine geeignete Vorbereitung zum nachträglichen Anschweißen eines Anschlussstutzens implementiert ist.Connection pieces can either be made using the primary molding process (investment casting) can be cast on directly or subsequently welded on using a suitable process. For this purpose, it is expedient if a suitable preparation for the subsequent welding of a connecting piece is implemented in the inlet and / or outlet connection housing module.
In der Zeichnung sind eine vorbekannte, zum Stand der Technik gehörende Konstruktion sowie eine als Beispiel dienende Ausführungsform der Erfindung dargestellt. Es zeigenIn the drawing, a known construction belonging to the prior art and an exemplary embodiment of the invention are shown. Show it
Figur 1 im Längsschnitt eine zweispindeligeFigure 1 in longitudinal section a two-spindle
Schraubenspindelpumpe gemäß dem Stand derScrew pump according to the state of the
Technik undTechnology and
Figur 2 in einer Darstellung gemäß Figur 1 eine zweispindelige Schraubenspindelpumpe gemäß der Erfindung.Figure 2 in a representation according to Figure 1, a two-spindle screw pump according to the invention.
Sowohl bei der vorbekannten Ausführungsform gemäß Figur 1 als auch bei der erfindungsgemäßen Konstruktion gemäß Figur 2 handelt es sich jeweils um eine zweispindelige Schraubenspindelpumpe mit Außenlagerung in einflutiger Bauweise.Both in the previously known embodiment according to FIG. 1 and in the construction according to the invention according to FIG. 2, each is a two-spindle screw pump with external bearing in a single-flow design.
Vorgesehen sind zwei parallelachsig angeordnete, miteinander im Eingriff stehende Schraubenspindeln 1 , 2, die von einem Pumpengehäuse 3 umschlossen und in einer an dieses Pumpengehäuse 3 angeflanschten Außenlagerung 4 gelagert sind. Das Pumpengehäuse 3 weist einen einlassseitigen, in einen Saugraum 5 führenden Anschluss 6 auf für das anzusaugende, durch einen Pfeil 7 symbolisierte Fördermedium und weist ferner einen auslassseitigen mit einem Druckraum 8 in Verbindung stehenden Anschluss 9 auf für eine Druckförderleitung für das abzuführende, durch einen Pfeil 10 symbolisierte Fördermedium. Durch das die beiden Schraubenspindeln 1 , 2 umschließende Pumpengehäuse 3 werden für den Pumpprozess erforderliche Förderkammern 1 1 gebildet, die bei Rotation der Schraubenspindeln 1 , 2 das angesaugte Fördermedium vom Saugraum 5 in den Druckraum 8 fördert. Da es für das Fördermedium nur diese eine Strömungsrichtung gibt, spricht man von einer einflutigen Bauweise.Provided are two screw spindles 1, 2 which are arranged in parallel axes and are in engagement with one another, which are enclosed by a pump housing 3 and are mounted in an outer bearing 4 flanged to this pump housing 3. The pump housing 3 has an inlet-side connection 6 leading into a suction chamber 5 for the delivery medium to be sucked in, symbolized by an arrow 7, and furthermore has a connection 9 for a connection to a pressure chamber 8 Pressure delivery line for the delivery medium to be discharged, symbolized by an arrow 10. The pump housing 3 enclosing the two screw spindles 1, 2 forms the delivery chambers 11 required for the pumping process, which, when the screw spindles 1, 2 rotate, conveys the pumped medium from the suction chamber 5 into the pressure chamber 8. Since there is only this one flow direction for the pumped medium, one speaks of a single-flow design.
In der eine beispielsweise Ausführungsform der Erfindung zeigenden Figur 2 sind die mit Figur 1 übereinstimmenden Bauteile mit den gleichen Bezugszeichen versehen. Es handelt sich also ebenfalls um eine zweispindelige Schraubenspindelpumpe mit Außenlagerung in einflutiger Bauweise; unterschiedlich gestaltet ist jedoch das Pumpengehäuse 3, das dreiteilig ausgebildet ist. Derjenige Teil des Pumpengehäuses, der die Schraubenspindeln 1 , 2 unmittelbar umschließt und hierdurch die für den Pumpprozess erforderlichen Förderkammern 1 1 bildet und diese mit seiner inneren Mantelfläche 1 2a radial außen begrenzt, ist als Fördergehäusemodul 1 2 ausgebildet, an dessen eine (in Figur 2 linke) Stirnseite ein auswechselbares Einlass-Anschlussgehäusemodul 13 und an dessen andere (in Figur 2 rechte) Stirnseite ein auswechselbares Auslass-In FIG. 2, which shows an embodiment of the invention, for example, the components that correspond to FIG. 1 are provided with the same reference numerals. So it is also a two-spindle screw pump with external bearings in a single-flow design; However, the pump housing 3, which is constructed in three parts, is designed differently. That part of the pump housing which directly surrounds the screw spindles 1, 2 and thereby forms the delivery chambers 11 required for the pumping process and delimits them radially on the outside with its inner circumferential surface 1 2a is designed as a delivery housing module 122, on the one of which (in FIG left) end face an interchangeable inlet connection housing module 13 and on the other (right in FIG. 2) end face an interchangeable outlet
Anschlussgehäusemodul 14 angeflanscht sind. Die an jeder der beiden Stirnseiten des Fördergehäusemoduls 1 2 mit einem Anschlussmodul 1 3 bzw. 1 4 gebildeten Trennfugen 1 5, 1 6 verlaufen jeweils senkrecht zu den Spindelachsen 1 7, 18 durch den Saugraum 5- bzw. Druckraum 8-Querschnitt hindurch. Hierdurch ist die Möglichkeit geschaffen, bei abgenommenen Anschlussmodulen 1 2, 13 die innere Mantelfläche 12a des Fördergehäusemoduls 12 von beiden Stirnseiten her mit axial eingeführten Werkzeugen zu bearbeiten und dann beispielsweise mit einer Verschleißschutzschicht zu versehen. Jedes der beiden Anschlussmodule 13, 14 ist mit einem Anschlussstutzen 19, 20 versehen, die zur Einbindung der Schraubenspindelpumpe in eine nicht näher dargestellte Förderanlage dienen und entweder im Urformverfahren (Feinguss) direkt angegossen oder aber durch ein geeignetes Verfahren nachträglich angeschweißt werden. Connection housing module 14 are flanged. The joints 1 5, 1 6 formed on each of the two end faces of the conveyor housing module 1 2 with a connection module 1 3 or 1 4 each run perpendicular to the spindle axes 1 7, 18 through the suction chamber 5 or pressure chamber 8 cross section. This creates the possibility, when the connection modules 1 2, 13 are removed, of machining the inner lateral surface 12a of the conveyor housing module 12 from both ends with axially inserted tools and then, for example, providing them with a wear protection layer. Each of the two connection modules 13, 14 is provided with a connection piece 19, 20, which are used to integrate the screw pump into a conveyor system (not shown in more detail) and either cast directly in the master molding process (investment casting) or subsequently welded on using a suitable process.

Claims

Patentansprüche claims
1 . Zweispindelige Schraubenspindelpumpe in einflutiger Bauweise, mit - einer Außenlagerung (4) der beiden Schraubenspindeln ( 1 ,1 . Double-spindle screw pump in single-flow design, with - an external bearing (4) of the two screw spindles (1,
2), einem zumindest die beiden Schraubenspindeln ( 1 , 2) umschließenden und hierdurch die für den Pumpprozess erforderlichen Förderkammern ( 1 1 ) bildenden Pumpengehäuse (3), einem einlassseitigen, in einen Saugraum (5) führenden2), a pump housing (3) enclosing at least the two screw spindles (1, 2) and thereby forming the pumping chambers (1 1) required for the pumping process, an inlet side leading into a suction chamber (5)
Anschluss (6) für das anzusaugende Fördermedium (PfeilConnection (6) for the pumped medium (arrow
7), und einem auslassseitigen, mit einem Druckraum (8) in Verbindung stehenden Anschluss (9) für eine7), and an outlet-side connection (9) for a pressure chamber (8) in connection
Druckförderleitung für das abzuführende FördermediumPressure delivery line for the medium to be discharged
(Pfeil 10),(Arrow 10),
dadurch gekennzeichnet, dass zumindest einer der beiden Anschlüsse (6, 9) Teil eines auswechselbaren Einlass- bzw.characterized in that at least one of the two connections (6, 9) is part of a replaceable inlet or
Auslass-Anschlussgehäuse-moduls ( 1 3 bzw. 14) istOutlet connection housing module (1 3 or 14)
(nachfolgend zusammenfassend "Anschlussmodul"), das unter(hereinafter collectively "connection module"), which under
Bildung einer Trennfuge (1 5, 16) an ein FördergehäusemodulForming a parting line (1 5, 16) on a conveyor housing module
( 12) angeflanscht ist, das mit seiner inneren Mantelfläche ( 12a) die Förderkammern ( 1 1 ) außen begrenzt, wobei die Trennfugen(12) is flanged, which delimits the delivery chambers (1 1) on the outside with its inner lateral surface (12a), the parting lines
( 1 5, 1 6) zwischen Fördergehäusemodul ( 1 2) und(1 5, 1 6) between the conveyor housing module (1 2) and
Anschlussmodul (13, 14) senkrecht zu den Spindelachsen (1 7,Connection module (13, 14) perpendicular to the spindle axes (1 7,
1 8) durch den Saugraum (5)- bzw. Druckraum (8)-Querschnitt hindurch verlaufen. Zweispindelige Schraubenspindelpumpe nach Anspruch 1 , dadurch gekennzeichnet, dass die innere Mantelfläche (12a) des Fördergehäusemoduls (12) mit einer Verschleißschutzschicht versehen ist.1 8) through the suction chamber (5) or pressure chamber (8) cross section. Two-spindle screw pump according to claim 1, characterized in that the inner lateral surface (12a) of the conveyor housing module (12) is provided with a wear protection layer.
Zweispindelige Schraubenspindelpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Anschlussmodul ( 13, 14) einen angeschweißten Anschlussstutzen ( 19, 20) aufweist. Two-spindle screw pump according to claim 1 or 2, characterized in that the connection module (13, 14) has a welded-on connection piece (19, 20).
PCT/DE2003/003488 2002-12-11 2003-10-21 Screw pump WO2004053333A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP03812553A EP1570180B1 (en) 2002-12-11 2003-10-21 Screw pump
AU2003302806A AU2003302806A1 (en) 2002-12-11 2003-10-21 Screw pump
DE50309747T DE50309747D1 (en) 2002-12-11 2003-10-21 SCREW PUMP

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10257859A DE10257859C5 (en) 2002-12-11 2002-12-11 Screw Pump
DE10257859.1 2002-12-11

Publications (1)

Publication Number Publication Date
WO2004053333A1 true WO2004053333A1 (en) 2004-06-24

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ID=32477556

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/003488 WO2004053333A1 (en) 2002-12-11 2003-10-21 Screw pump

Country Status (5)

Country Link
EP (1) EP1570180B1 (en)
AT (1) ATE393883T1 (en)
AU (1) AU2003302806A1 (en)
DE (2) DE10257859C5 (en)
WO (1) WO2004053333A1 (en)

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DE202010011333U1 (en) 2009-09-09 2010-10-28 Jung & Co. Gerätebau GmbH Screw pump with multipart housing
DE202009014604U1 (en) 2009-10-29 2010-01-28 Jung & Co. Gerätebau GmbH Screw pump with coupling

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Also Published As

Publication number Publication date
DE50309747D1 (en) 2008-06-12
DE10257859C5 (en) 2012-03-15
AU2003302806A1 (en) 2004-06-30
ATE393883T1 (en) 2008-05-15
EP1570180B1 (en) 2008-04-30
DE10257859B4 (en) 2005-04-21
EP1570180A1 (en) 2005-09-07
DE10257859A1 (en) 2004-07-08

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