EP1468189A1 - Pump with a pump shaft which extends through a drive motor - Google Patents

Pump with a pump shaft which extends through a drive motor

Info

Publication number
EP1468189A1
EP1468189A1 EP03731690A EP03731690A EP1468189A1 EP 1468189 A1 EP1468189 A1 EP 1468189A1 EP 03731690 A EP03731690 A EP 03731690A EP 03731690 A EP03731690 A EP 03731690A EP 1468189 A1 EP1468189 A1 EP 1468189A1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
pump according
housing
motor housing
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
Application number
EP03731690A
Other languages
German (de)
French (fr)
Other versions
EP1468189B1 (en
Inventor
Manfred Britsch
Michael Matros
Markus Wucher
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.)
Allweiler GmbH
Original Assignee
Allweiler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allweiler AG filed Critical Allweiler AG
Publication of EP1468189A1 publication Critical patent/EP1468189A1/en
Application granted granted Critical
Publication of EP1468189B1 publication Critical patent/EP1468189B1/en
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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw type

Definitions

  • the invention relates to a pump with the rotor of a drive motor arranged in a motor housing - and outside of the shaft bearing - of a pump shaft which passes through and which is ultimately provided with a pump impeller having blades.
  • Such a pump is described in DE 15 28 640 B2 by the applicant;
  • the motor housing is laterally connected to a pump housing and contains - on both sides of the drive motor - a shaft bearing with a sleeve surrounding a shaft journal and the bearing-encompassing O-ring.
  • a disk is attached between the area of the pump shaft passing through the drive motor and the shaft bearing.
  • One end of the pump shaft carries the pump impeller, which is rotatable in the pump housing, the circumference of which rotates in the area of the pressure side of the pump housing and which opens centrally towards the suction side.
  • the bearing parts of the pump shaft and the pump housing that slide on each other consist of sintered single-material material (alpha-aluminum oxide) of high purity, which is particularly suitable for use in glandless heating circulation pumps.
  • the inventor has set himself the goal of creating a novel pump concept in which the drive is integrated in the pump hub and built-in motor parts from series production can be used.
  • the motor housing is surrounded at the radial distance by a pump housing, which surrounds the pump impeller with a so-called neck section, the latter being connected to the pump shaft by means of a hub delimiting the annular space to the longitudinal axis of the pump, and the blades of the pump impeller in protrude that annulus.
  • a central connecting piece is to be integrally formed on the inside of the bottom of the bowl-like hub of the pump impeller for receiving one end of the pump shaft in order to form a common rotating unit with the latter.
  • the pump housing tapers on both sides of a pipe section through a neck section each with a connection area that is inclined in the longitudinal section toward the longitudinal axis, the length of the connection area being able to correspond to approximately half the length of the neck section; the neck section ends with a region approximately parallel to the longitudinal axis, which is offset axially to that tube section.
  • the inclined - preferably curved - connection area of the pump housing is opposite a correspondingly shaped end section of the motor housing and limits the annular space with it without significantly changing its longitudinal shape.
  • the end section of the motor housing should also be attached to the hub of the pump impeller, ie the standing end section is adjacent to the rotating hub, the bowl wall of which is preferably flush with the end section.
  • the annular space is divided into flow channels by axially parallel guide walls; these guide walls are radial ribs of a central tube of the motor housing and / or of the tube section of the pump housing.
  • the pump shaft passes through roller bearings which are mounted in the axial connecting piece of the motor housing.
  • These axial connections are each part of the end section of the motor housing and, according to another feature, each include a sealing insert and / or shaft seals and / or a shaft protection sleeve in addition to the rolling bearing.
  • a sealing cover should be placed in front of the connecting piece and / or the sealing insert.
  • the end section of the motor housing is firmly connected to the neck section of the pump housing by rod-like — preferably hollow and radial — struts; the latter are preferably formed in one piece with their end section and the neck section to form a unitary component.
  • at least one of the struts contains a leakage channel which ends at the pump shaft.
  • Such a leakage removal which can be monitored by means of a leakage sensor, is advantageously provided between the second and third radial shaft sealing rings.
  • the end of the pump shaft which is remote from the pump impeller, is overlapped by a cover cap, which is attached to the end section of the motor housing adjacent to it; the free end of the pump shaft then preferably overlaps a final end cap.
  • An additional two-stage version of the pump according to the invention has an elongated pump shaft, at each end of which a pump impeller is connected, ie the two-stage version contains a second pump impeller on its elongated shaft compared to the first pump impeller.
  • a plane of symmetry for the pump in the axial center of the pump housing Both versions preferably have the same dimensions.
  • the pump according to the invention is to be manufactured primarily with three different blade angles of 8 °, 12 ° and 16 ° and with two 4-pole motor variants (34 KW and 54 KW).
  • the built-in motor consists of standard parts from standard motor production.
  • FIG. 2 an enlarged detail from FIG. 1;
  • FIG. 3 a longitudinal section corresponding approximately to FIG. 1 through a two-stage inline propeller pump according to line III-III in FIG. 4;
  • FIG. 4 an end view of FIG. 3;
  • Fig. 6 an oblique view of an impeller.
  • a single-stage inline pump 10 with an exemplary length n of here 910 mm and an outer diameter d of 520 mm has a three-part pump housing 12 according to FIG - Neck sections 16 of length n 2 , each tapering concentrically to an axial length q through a cross-sectionally curved connecting section 16 a ; the wall area of its mouth ends runs approximately halfway along that length n 2 in a longitudinal section offset parallel to the longitudinal axis A of the pump housing 12.
  • the housing sections 14 and 16 are otherwise joined together on radial flange ribs 15, 17.
  • a pump shaft 20 is provided in the longitudinal axis A of the pump housing 12 and is mounted in the axial bearing or pipe socket 24 of a likewise three-part motor housing 30 by means of roller bearings 22.
  • This axial bearing stub 24 is integrally formed on the inside of a collar-like end section 26 of the motor housing 30, which in turn is approximately parallel to that connecting section 16 a, and is connected to the adjacent neck section 16 by at least three radial struts 25, 25 a .
  • the end section 26 is longitudinally inclined in accordance with that connecting section 16 a and detachably attached to the tubular central section 28 of the length z of the motor housing 30.
  • the left-hand roller bearing 22 in FIG. 1 surrounds a shaft journal 21, which is delimited at one end by an annular step 21 a and which, according to FIG. 2, is followed by a sealing insert 32 and a sealing cover 34; the latter encompasses a shaft protection sleeve 36, to which a spacer ring 37 adjoins on the outside, followed by shaft sealing rings 38. Between these ends a leakage channel 39, which runs in a strut 25 a , which can be seen in FIG of the pump housing 12 is integrally formed. 40 is a key on the pump shaft 20 in FIG. 2.
  • the left end portion 26 of the motor housing 30 in FIG. 1 is assigned a bowl-like part of a pump impeller 46 as its hub 42 of the outer diameter e with an outwardly directed bowl bottom 43, on the inside of which a connection piece 44 for the pump shaft 20 is formed; the impeller 46 having blades 45 is connected to the shaft journal 21 of the pump shaft 20 - among other things. connected by that key 40 - -.
  • the other end of the pump shaft 20 is spanned by a final bearing cover 47, which a cover cap 48 with a spherical outer surface 49 overlaps at a distance.
  • the outer diameter b of the motor housing 30 corresponding in its contour almost to that of the pump housing 12 is - thanks to the described curved connecting sections 16 a of the pump housing 12 - longer than the inner diameter at the end of the neck section 16.
  • the motor housing 30 surrounds - with limitation of the flow to the pump impeller 46 annular space 50 of radial width a of approximately 49 mm - a drive or built-in motor 52 which comprises a rotor assembly 54 penetrated by the pump shaft 20 and a stator assembly 56 on the housing side.
  • the electrical cables to the built-in motor 52 are led through an axial channel in one of the struts 25, not visible in the drawing.
  • the drive is integrated into the pump hub 42, and parts of the built-in motor 52 from the usual series production can be used.
  • a two-stage inline pump 11 which offers that length n of 910 mm and also the outer diameter d of 520 mm.
  • Their longitudinal axis A crosses a radial plane of symmetry E, on both sides of which the mutually identical pump sections run. Since the pump shaft 20 a is of the same configuration on both sides, there are collar-shaped end sections 26 on both sides of that plane of symmetry E - starting from the cylindrical central tube or central section 28 of the motor housing 30 - in which the group of roller bearings 22, sealing inserts 32 highlighted in FIG. 2 are present and sealing covers 34 are provided, likewise a leakage channel 39 between the shaft sealing rings 38.
  • An end bowl as a hub 42 with an impeller 46 is assigned to each of the end sections 26.
  • the motor housing 30 surrounding the drive or built-in motor 52 is provided in the region of its central section 28 of length z with — here twelve — radially molded-on ribs 58 as guide walls or guide plates. These limit axially parallel flow channels 60 of the annular space 50. Radial ribs 62 also protrude from the central tube section 14 of the pump housing 12 on the outer surface - here: three.
  • the drive is also integrated into the pump hub 42.
  • Two impellers 46 are driven by the built-in motor 52.
  • the flow through those baffles 58 is so calmed that a swirl-free flow against the respective downstream impeller 46 is ensured even if the liquid is moved into the second axial direction by reversing the polarity of the built-in motor 52 and reversing the conveying direction Direction is promoted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fertilizing (AREA)

Abstract

A pump with a rotor (54) of a drive motor (52) arranged in motor housing (30) with a pump shaft (20) piercing the shaft bearing (22). The motor housing (30) is radially surrounded by a pump housing (12) to define an annular space (50) in a radially spacing (a), that envelops the pump impellor (36) with a throat section (16), such that the latter is connected by a hub (42) to the pump shaft (20) and blades (45) extend into the annular space (50).

Description

Pumpe mit einen Äntriebsmotor durchsetzender Pumpenwelle Pump with a pump shaft passing through a drive motor
Die Erfindung betrifft eine Pumpe mit den Rotor eines in einem Motorgehäuse angeordneten Antriebsmotors -- sowie außerhalb dessen Wellenlager — durchsetzender Pumpenwelle, die endwarts mit einem Schaufeln aufweisenden Pumpenlaufrad versehen ist.The invention relates to a pump with the rotor of a drive motor arranged in a motor housing - and outside of the shaft bearing - of a pump shaft which passes through and which is ultimately provided with a pump impeller having blades.
Eine derartige Pumpe wird in der DE 15 28 640 B2 der Anmelderin beschrieben; bei einer Heizungsumwälzpumpe ist das Motorgehäuse seitlich an ein Pumpengehäuse angeschlossen und enthält — beidseits des Antriebsmotors — jeweils ein Wellenlager mit einen Wellenzapfen umgebender Hülse und das Lager umfangendem O-Ring. Zwischen dem den Antriebsmotor durchsetzenden Bereich der Pumpenwelle und dem Wellenlager ist jeweils eine Scheibe angebracht. Das eine Ende der Pumpenwelle trägt das im Pumpengehäuse drehbare Pumpenlaufrad, dessen umfang sich im Bereich der Druckseite des Pumpengehäuses dreht und das sich zentrisch zur Saugseite hin öffnet. Die aufeinander gleitenden Lagerteile der Pumpenwelle und des Pumpengehäuses bestehen hier aus gesintertem Ein- stoff-Werkstoff (Alpha-Aluminium-Oxid) hoher Reinheit, der sich besonders für den Einsatz in stopfbuchsenlosen Heizungsumwälzpumpen eignet.Such a pump is described in DE 15 28 640 B2 by the applicant; In the case of a heating circulation pump, the motor housing is laterally connected to a pump housing and contains - on both sides of the drive motor - a shaft bearing with a sleeve surrounding a shaft journal and the bearing-encompassing O-ring. A disk is attached between the area of the pump shaft passing through the drive motor and the shaft bearing. One end of the pump shaft carries the pump impeller, which is rotatable in the pump housing, the circumference of which rotates in the area of the pressure side of the pump housing and which opens centrally towards the suction side. The bearing parts of the pump shaft and the pump housing that slide on each other consist of sintered single-material material (alpha-aluminum oxide) of high purity, which is particularly suitable for use in glandless heating circulation pumps.
In Kenntnis dieser Gegebenheiten hat sich der Erfinder das Ziel gesetzt, eine neuartige Konzeption einer Pumpe zu schaffen, bei welcher der Antrieb in die Pumpennabe integriert ist und Einbaumotorteile aus der Serienproduktion eingesetzt zu werden vermögen.Knowing these circumstances, the inventor has set himself the goal of creating a novel pump concept in which the drive is integrated in the pump hub and built-in motor parts from series production can be used.
Zur Lösung dieser Aufgabe führt die Lehre des unabhängigen Anspruches; die Unteransprüche geben günstige Weiterbildungen an. Zudem fallen in den Rahmen der Erfindung alle Kombinationen aus zumindest zwei der in der Beschreibung, der Zeichnung und/oder den Ansprüchen offenbarten Merkmale. Erfindungsgemäß ist das Motorgehäuse unter Begrenzung eines Ringraumes in radialem Abstand von einem Pumpengehäuse umgeben, das mit einem sog. Halsabschnitt das Pumpenlaufrad umfängt, wobei letzteres mittels einer den Ringraum zur Längsachse der Pumpe hin begrenzenden Nabe an die Pumpenwelle angeschlossen ist sowie die Schaufeln des Pumpenlaufrades in jenen Ringraum ragen.The teaching of the independent claim leads to the solution of this task; the subclaims indicate favorable further training. In addition, all combinations of at least two of the features disclosed in the description, the drawing and / or the claims fall within the scope of the invention. According to the invention, the motor housing is surrounded at the radial distance by a pump housing, which surrounds the pump impeller with a so-called neck section, the latter being connected to the pump shaft by means of a hub delimiting the annular space to the longitudinal axis of the pump, and the blades of the pump impeller in protrude that annulus.
Nach einem weiteren Merkmal der Erfindung soll an den Boden der schüsselartig ausgestatteten Nabe des Pumpenlaufrades innenseitig ein zentraler Stutzen angeformt sein zur Aufnahme eines Endes der Pumpenwelle, um mit dieser eine gemeinsame drehende Einheit zu bilden.According to a further feature of the invention, a central connecting piece is to be integrally formed on the inside of the bottom of the bowl-like hub of the pump impeller for receiving one end of the pump shaft in order to form a common rotating unit with the latter.
Als günstig hat es sich erwiesen, dass sich das Pumpengehäuse beidseits eines Rohrabschnitts durch jeweils einen Halsabschnitt mit einem in Längsschnitt zur Längsachse hin geneigten Anschlussbereich verjüngt, wobei die Länge des Anschlussbereiches etwa der Hälfte der Länge des Halsabschnitts entsprechen kann; der Halsabschnitt endet mit einem zur Längsachse etwa parallelen Bereich, der zu jenem Rohrabschnitt achswärts versetzt ist.It has proven to be advantageous that the pump housing tapers on both sides of a pipe section through a neck section each with a connection area that is inclined in the longitudinal section toward the longitudinal axis, the length of the connection area being able to correspond to approximately half the length of the neck section; the neck section ends with a region approximately parallel to the longitudinal axis, which is offset axially to that tube section.
Um den Ringraum entlang des gesamten Pumpengehäuses auszubilden, liegt dem geneigten — vorzugsweise gekrümmt ausgebildeten -- Anschlussbereich des Pumpengehäuses ein entsprechend geformter Stirnabschnitt des Motorgehäuses gegenüber und begrenzt mit diesem den Ringraum, ohne dessen längsschnittliche Form wesentlich zu verändern.In order to form the annular space along the entire pump housing, the inclined - preferably curved - connection area of the pump housing is opposite a correspondingly shaped end section of the motor housing and limits the annular space with it without significantly changing its longitudinal shape.
Vorteilhafterweise soll zudem der Stirnabschnitt des Motorgehäuses an die Nabe des Pumpenlaufrades angefügt sein, d.h. der stehende Stirnabschnitt ist der drehenden Nabe benachbart, deren Schüsselwandung mit dem Stirnabschnitt bevorzugt fluchtet. Nach einem weiteren Merkmal der Erfindung wird der Ringraum durch achsparallele Leitwände in Strömungskanäle unterteilt; diese Leitwände sind radiale Rippen eines Mittelrohres des Motorgehäuses und/oder des Rohrabschnittes des Pumpengehäuses .Advantageously, the end section of the motor housing should also be attached to the hub of the pump impeller, ie the standing end section is adjacent to the rotating hub, the bowl wall of which is preferably flush with the end section. According to a further feature of the invention, the annular space is divided into flow channels by axially parallel guide walls; these guide walls are radial ribs of a central tube of the motor housing and / or of the tube section of the pump housing.
Die Pumpenwelle durchsetzt erfindungsgemäß Wälzlager, die in axialen Stutzen des Motorgehäuses lagern. Diese axialen Stutzen sind jeweils Teil des Stirnabschnitts des Motorgehäuses und umfangen nach einem anderen Merkmal jeweils neben dem Wälzlager einen Dichtungseinsatz und/oder Wellendichtungen und/oder eine Wellenschutzhülse. Zudem soll dem Stutzen und/oder dem Dichtungseinsatz ein Dichtungsdeckel vorgesetzt sein. Hier wird auf engem Raum eine optimierte Verbindung von Pumpenwelle und Gehäuse erzielt.According to the invention, the pump shaft passes through roller bearings which are mounted in the axial connecting piece of the motor housing. These axial connections are each part of the end section of the motor housing and, according to another feature, each include a sealing insert and / or shaft seals and / or a shaft protection sleeve in addition to the rolling bearing. In addition, a sealing cover should be placed in front of the connecting piece and / or the sealing insert. Here, an optimized connection of the pump shaft and housing is achieved in a small space.
Von erfindungsgemäßer Bedeutung ist, dass der Stirnabschnitt des Motorgehäuses mit dem Halsabschnitt des Pumpengehäuses durch stabähnliche — bevorzugt hohle sowie radiale — Streben fest verbunden wird; letztere sind mit ihrem Stirnabschnitt sowie dem Halsabschnitt bevorzugt einstückig zu einem einheitlichen Bauteil ausgeformt. Erfindungsgemäß enthält wenigstens eine der Streben einen Leckagekanal, der einends an der Pumpenwelle endet. Vorteilhafterweise ist zwischen dem zweiten und dritten Radialwellen- dichtring eine solche Leckageabfuhr vorgesehen, die mittels eines Leckagesensors überwacht werden kann.It is of importance according to the invention that the end section of the motor housing is firmly connected to the neck section of the pump housing by rod-like — preferably hollow and radial — struts; the latter are preferably formed in one piece with their end section and the neck section to form a unitary component. According to the invention, at least one of the struts contains a leakage channel which ends at the pump shaft. Such a leakage removal, which can be monitored by means of a leakage sensor, is advantageously provided between the second and third radial shaft sealing rings.
Bei einer erfindungsgemäßen einstufigen Ausgestaltung wird das dem Pumpenlaufrad ferne Ende der Pumpenwelle von einer Deckkappe übergriffen, und diese ist an den ihr benachbarten Stirnabschnitt des Motorgehäuses angefügt; die freie Stirn der Pumpenwelle übergreift dann bevorzugt ein abschließender Endlagerdeckel. Eine zusätzliche zweistufige Ausführung der erfindungsgemäßen Pumpe besitzt eine verlängerte Pumpenwelle, an deren beiden Enden jeweils ein Pumpenlaufrad angeschlossen ist, d.h. die zweistufige Ausführung .enthält an ihrer verlängerten Welle gegenüber dem ersten Pumpenlaufrad ein zweites Pumpenlaufrad. Hier liegt in der axialen Mitte des Pumpengehäuses eine Symmetrieebene für die Pumpe. Bevorzugt haben im übrigen beide Ausführungen die gleichen Abmessungen.In a single-stage embodiment according to the invention, the end of the pump shaft, which is remote from the pump impeller, is overlapped by a cover cap, which is attached to the end section of the motor housing adjacent to it; the free end of the pump shaft then preferably overlaps a final end cap. An additional two-stage version of the pump according to the invention has an elongated pump shaft, at each end of which a pump impeller is connected, ie the two-stage version contains a second pump impeller on its elongated shaft compared to the first pump impeller. Here is a plane of symmetry for the pump in the axial center of the pump housing. Both versions preferably have the same dimensions.
Die besonderen Merkmale der Konstruktion sind:The special features of the construction are:
• Integration des Antriebs in die Pumpennabe;• Integration of the drive in the pump hub;
• Verwendung von Einbaumotorteilen aus der Serienproduktion;• Use of built-in engine parts from series production;
• Wälzlagerung;• roller bearings;
• Abdichtung mit Radialwellendichtringen;• sealing with radial shaft seals;
• Leitwände zur axialen Ausrichtung der Strömung - vor allem bei der zweistufigen Ausführung.• Baffles for the axial alignment of the flow - especially in the two-stage version.
Die erfindungsgemäße Pumpe soll vor allem mit drei verschiedenen Schaufelwinkeln von 8°, 12° und 16° hergestellt werden sowie mit zwei 4-poligen Motorvarianten (34 KW und 54 KW) . Der Einbaumotor besteht aus Standardteilen aus der Normmotorenproduktion .The pump according to the invention is to be manufactured primarily with three different blade angles of 8 °, 12 ° and 16 ° and with two 4-pole motor variants (34 KW and 54 KW). The built-in motor consists of standard parts from standard motor production.
Als deutliche Vorzüge des Erfindungsgegenstandes gegenüber dem Stande der Technik seien angeführt:The following are the clear advantages of the subject matter of the invention over the prior art:
• keine hydraulischen Verluste im Spalt zwischen Rotor und Stator;• no hydraulic losses in the gap between the rotor and stator;
• keine Wirbelstromverluste im Spaltrohr, folglich höherer Motorwirkungsgrad;• no eddy current losses in the canned tube, consequently higher engine efficiency;
• Gesamtwirkungsgrad deutlich höher, dadurch Leistungsbedarf wesentlich geringer;• Overall efficiency significantly higher, resulting in a significantly lower power requirement;
• Installationskosten niedriger; • preiswerte, robuste Wälzlagerung;• installation costs lower; • inexpensive, robust roller bearings;
• weniger Sonderteile;• fewer special parts;
• geringeres Pumpengewicht;• lower pump weight;
• kleinerer Außendurchmesser der Pumpe;• smaller outside diameter of the pump;
• gleiche Einbaumaße für die ein- und die zweistufige Ausführung. • Same installation dimensions for the one and two-stage version.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt inFurther advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in
Fig. 1: einen Längsschnitt durch eine einstufige Inline-Propeller-Pumpe;1: a longitudinal section through a single-stage inline propeller pump;
Fig. 2: einen vergrößerten Ausschnitt aus Fig. 1;FIG. 2: an enlarged detail from FIG. 1;
Fig. 3: einen der Fig. 1 etwa entsprechenden Längsschnitt durch eine zweistufige Inline-Pro- peller-Pumpe gemäß Linie III-III in Fig. 4;3: a longitudinal section corresponding approximately to FIG. 1 through a two-stage inline propeller pump according to line III-III in FIG. 4;
Fig. 4: eine Stirnansicht zu Fig. 3;FIG. 4: an end view of FIG. 3;
Fig. 5: den Querschnitt durch Fig. 3 nach deren Linie V-V;5: the cross section through FIG. 3 along the line V-V;
Fig. 6: eine Schrägsicht auf ein Laufrad.Fig. 6: an oblique view of an impeller.
Eine einstufige Inline-Pumpe 10 einer beispielsweisen Länge n von hier 910 mm sowie eines äußeren Durchmessers d von 520 mm weist gemäß Fig. 1 ein dreiteiliges Pumpengehäuse 12 aus einem zentralen Rohrabschnitt 14 der Länge ni und zwei an diesen angesetzte — endwarts radiale Flanschkragen 18 anbietende — Halsabschnitte 16 der Länge n2 auf, die sich jeweils auf eine axiale Länge q durch einen querschnittlich gekrümmten Anschlussabschnitt 16a konzentrisch verjüngen; der Wandbereich ihrer Mündungsenden verläuft etwa in einer Hälfte jener Länge n2 längsschnittlich parallel zur Längsachse A des Pumpengehäuses 12 zu dieser hin versetzt. Die Gehäuseabschnitte 14 und 16 sind im übrigen an Radialflanschrippen 15, 17 aneinandergefügt. In Längsachse A des Pumpengehäuses 12 ist eine Pumpenwelle 20 vorgesehen sowie mittels Wälzlagern 22 in axialen Lageroder Rohrstutzen 24 eines ebenfalls dreiteiligen Motorgehäuses 30 gelagert. Dieser axiale Lagerstutzen 24 ist an einen -- seinerseits etwa parallel zu jenem Anschlussabschnitt 16a gekrümmten -- kragenartigen Stirnabschnitt 26 des Motorgehäuses 30 innenseitig angeformt sowie durch zumindest drei radiale Streben 25, 25a mit dem benachbarten Halsabschnitt 16 verbunden. Der Stirnabschnitt 26 ist entsprechend jenem Anschlussabschnitt 16a längsschnittlich geneigt sowie an den rohrartigen Zentralabschnitt 28 der Länge z des Motorgehäuses 30 lösbar angefügt.A single-stage inline pump 10 with an exemplary length n of here 910 mm and an outer diameter d of 520 mm has a three-part pump housing 12 according to FIG - Neck sections 16 of length n 2 , each tapering concentrically to an axial length q through a cross-sectionally curved connecting section 16 a ; the wall area of its mouth ends runs approximately halfway along that length n 2 in a longitudinal section offset parallel to the longitudinal axis A of the pump housing 12. The housing sections 14 and 16 are otherwise joined together on radial flange ribs 15, 17. A pump shaft 20 is provided in the longitudinal axis A of the pump housing 12 and is mounted in the axial bearing or pipe socket 24 of a likewise three-part motor housing 30 by means of roller bearings 22. This axial bearing stub 24 is integrally formed on the inside of a collar-like end section 26 of the motor housing 30, which in turn is approximately parallel to that connecting section 16 a, and is connected to the adjacent neck section 16 by at least three radial struts 25, 25 a . The end section 26 is longitudinally inclined in accordance with that connecting section 16 a and detachably attached to the tubular central section 28 of the length z of the motor housing 30.
Das in Fig. 1 linke Wälzlager 22 umgibt einen Wellenzapfen 21, der einends von einer Ringstufe 21a begrenzt und dem gemäß Fig. 2 zum Wellenende hin ein Dichtungseinsatz 32 nachgeordnet ist sowie diesem ein Dichtungsdeckel 34; letzterer umfängt eine Wellenschutzhülse 36, an die außenseitig ein Abstandsring 37 anschließt, gefolgt von Wellendich- tringen 38. Zwischen diesen endet ein Leckagekanal 39, der in einer Strebe 25a verläuft, die in Fig. 2 — unten -- erkennbar an den Halsabschnitt 16 des Pumpengehäuses 12 angeformt ist. Mit 40 ist in Fig. 2 eine Passfeder an der Pumpenwelle 20 bezeichnet.The left-hand roller bearing 22 in FIG. 1 surrounds a shaft journal 21, which is delimited at one end by an annular step 21 a and which, according to FIG. 2, is followed by a sealing insert 32 and a sealing cover 34; the latter encompasses a shaft protection sleeve 36, to which a spacer ring 37 adjoins on the outside, followed by shaft sealing rings 38. Between these ends a leakage channel 39, which runs in a strut 25 a , which can be seen in FIG of the pump housing 12 is integrally formed. 40 is a key on the pump shaft 20 in FIG. 2.
Dem in Fig. 1 linken Stirnabschnitt 26 des Motorgehäuses 30 ist ein schüsselartiger Teil eines Pumpenlaufrades 46 als dessen Nabe 42 des Außendurchmessers e mit nach außen gerichtetem Schüsselboden 43 zugeordnet, dem innenseitig ein Stutzen 44 für die Pumpenwelle 20 angeformt ist; das Schaufeln 45 aufweisende Laufrad 46 ist mit dem Wellenzapfen 21 der Pumpenwelle 20 — u.a. durch jene Passfeder 40 - - verbunden.The left end portion 26 of the motor housing 30 in FIG. 1 is assigned a bowl-like part of a pump impeller 46 as its hub 42 of the outer diameter e with an outwardly directed bowl bottom 43, on the inside of which a connection piece 44 for the pump shaft 20 is formed; the impeller 46 having blades 45 is connected to the shaft journal 21 of the pump shaft 20 - among other things. connected by that key 40 - -.
Das andere Ende der Pumpenwelle 20 ist von einem Endlagerdeckel 47 überspannt, den eine Deckkappe 48 mit kalottenartiger Außenfläche 49 in Abstand übergreift. Der Außendurchmesser b des in seiner Kontur nahezu der des Pumpengehäuses 12 entsprechenden Motorgehäuses 30 ist -- dank der beschriebenen gekrümmten Anschlussabschnitte 16a des Pumpengehäuses 12 -- länger als der Innendurchmesser am Ende des Halsabschnittes 16. Das Motorgehäuse 30 umgibt — unter Begrenzung eines die Strömung zum Pumpenlaufrad 46 führenden Ringraumes 50 der radialen Weite a von etwa 49 mm — einen Antriebs- oder Einbaumotor 52, der ein von der Pumpenwelle 20 durchsetztes Rotorpaket 54 und ein gehäuse- seitiges Statorpaket 56 umfasst. Die Elektrokabel zum Einbaumotor 52 werden — in der Zeichnung nicht erkennbar — durch einen Axialkanal in einer der Streben 25 geführt.The other end of the pump shaft 20 is spanned by a final bearing cover 47, which a cover cap 48 with a spherical outer surface 49 overlaps at a distance. The outer diameter b of the motor housing 30 corresponding in its contour almost to that of the pump housing 12 is - thanks to the described curved connecting sections 16 a of the pump housing 12 - longer than the inner diameter at the end of the neck section 16. The motor housing 30 surrounds - with limitation of the flow to the pump impeller 46 annular space 50 of radial width a of approximately 49 mm - a drive or built-in motor 52 which comprises a rotor assembly 54 penetrated by the pump shaft 20 and a stator assembly 56 on the housing side. The electrical cables to the built-in motor 52 are led through an axial channel in one of the struts 25, not visible in the drawing.
Bei dieser Inline-Pumpe 10 ist der Antrieb in die Pumpennabe 42 integriert, und es können Teile des Einbaumotors 52 aus der üblichen Serienfertigung eingesetzt werden.In this inline pump 10, the drive is integrated into the pump hub 42, and parts of the built-in motor 52 from the usual series production can be used.
In den Fig. 3 bis 5 ist eine zweistufige Inline-Pumpe 11 wiedergegeben, die jene Länge n von 910 mm sowie ebenfalls den äußeren Durchmesser d von 520 mm anbietet. Deren Längsachse A quert eine radiale Symmetrieebene E, beidseits deren einander gleichende Pumpenabschnitte verlaufen. Da die Pumpenwelle 20a hier beidends von gleicher Ausgestaltung ist, sind beidseits jener Symmetrieebene E -- vom zylindrischen Mittelrohr oder Zentralabschnitt 28 des Motorgehäuses 30 ausgehende — kragenförmige Stirnabschnitte 26 vorhanden, in denen jene in Fig. 2 hervorgehobene Gruppe von Wälzlagern 22, Dichteinsätzen 32 und Dichtungsdeckeln 34 vorgesehen sind, ebenfalls je ein Leckagekanal 39 zwischen den Wellendichtringen 38. Jedem der Stirnabschnitte 26 ist eine Endschüssel als Nabe 42 mit Laufrad 46 zugeordnet . Das den Antriebs- oder Einbaumotor 52 umgebende Motorgehäuse 30 ist im Bereich seines Zentralabschnittes 28 der Länge z mit -- hier zwölf -- radial angeformten Rippen 58 als Leitwände oder Leitbleche versehen. Diese begrenzen achsparallele Strömungskanäle 60 des Ringraumes 50. Auch vom zentralen Rohrabschnitt 14 des Pumpengehäuses 12 ragen an der Außenfläche -- hier: drei -- Radialrippen 62 ab.3 to 5, a two-stage inline pump 11 is shown, which offers that length n of 910 mm and also the outer diameter d of 520 mm. Their longitudinal axis A crosses a radial plane of symmetry E, on both sides of which the mutually identical pump sections run. Since the pump shaft 20 a is of the same configuration on both sides, there are collar-shaped end sections 26 on both sides of that plane of symmetry E - starting from the cylindrical central tube or central section 28 of the motor housing 30 - in which the group of roller bearings 22, sealing inserts 32 highlighted in FIG. 2 are present and sealing covers 34 are provided, likewise a leakage channel 39 between the shaft sealing rings 38. An end bowl as a hub 42 with an impeller 46 is assigned to each of the end sections 26. The motor housing 30 surrounding the drive or built-in motor 52 is provided in the region of its central section 28 of length z with — here twelve — radially molded-on ribs 58 as guide walls or guide plates. These limit axially parallel flow channels 60 of the annular space 50. Radial ribs 62 also protrude from the central tube section 14 of the pump housing 12 on the outer surface - here: three.
Bei dieser zweistufigen Inline-Pumpe 11 ist der Antrieb ebenfalls in die Pumpennabe 42 integriert. Durch den Einbaumotor 52 werden zwei Laufräder 46 angetrieben. Im Pumpengehäuse 12 wird zwischen den beiden Laufrädern 46 die Strömung durch jene Leitbleche 58 so beruhigt, dass eine drallfreie Anströmung des jeweils nachgeordneten Laufrades 46 gewährleistet ist auch dann, wenn durch Umpolen des Einbaumotors 52 — und Umkehr der Förderrichtung — die Flüssigkeit in die zweite axiale Richtung gefördert wird. In this two-stage inline pump 11, the drive is also integrated into the pump hub 42. Two impellers 46 are driven by the built-in motor 52. In the pump housing 12 between the two impellers 46, the flow through those baffles 58 is so calmed that a swirl-free flow against the respective downstream impeller 46 is ensured even if the liquid is moved into the second axial direction by reversing the polarity of the built-in motor 52 and reversing the conveying direction Direction is promoted.

Claims

SCHUTZANSPRÜCHE PROTECTION CLAIMS
1. Pumpe mit den Rotor (54) eines in einem Motorgehäuse (30) angeordneten Antriebsmotors (52) sowie außerhalb dessen Wellenlager (22) durchsetzender Pumpenwelle (20), die endwarts mit einem Schaufeln (45) aufweisenden Pumpenlaufrad (46) versehen ist,1. Pump with the rotor (54) of a drive motor (52) arranged in a motor housing (30) and a pump shaft (20) penetrating outside of the shaft bearing (22) and which is provided with a pump impeller (46) with blades (45),
dadurch gekennzeichnet,characterized,
dass das Motorgehäuse (30) unter Begrenzung eines Ringraumes (50) in radialem Abstand (a) von einem Pumpengehäuse (12) umgeben ist, das mit einem Halsabschnitt (16) das Pumpenlaufrad (46) umfängt, wobei letzteres mittels einer den Ringraum (50) zur Längsachse (A) der Pumpe (10, 11) begrenzenden Nabe (42) an die Pumpenwelle angeschlossen ist sowie die Schaufeln (45) in den Ringraum (50) ragen.that the motor housing (30) is delimited by a pump housing (12), delimiting an annular space (50) at a radial distance (a), which surrounds the pump impeller (46) with a neck portion (16), the latter being connected to the annular space (50 ) to the longitudinal axis (A) of the pump (10, 11) delimiting hub (42) is connected to the pump shaft and the blades (45) protrude into the annular space (50).
2. Pumpe nach Anspruch 1, gekennzeichnet durch eine schüsselartige Nabe (42) des Pumpenlaufrades (46) mit innenseitig zentral vom Schüsselboden (43) abragendem Stutzen (44) zur Aufnahme eines Endes (21) der Pumpenwelle (20) .2. Pump according to claim 1, characterized by a bowl-like hub (42) of the pump impeller (46) with internally projecting centrally from the bowl bottom (43) connecting piece (44) for receiving an end (21) of the pump shaft (20).
3. Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich das Pumpengehäuse (12) beidseits eines Rohrabschnitts (14) durch jeweils einen Halsabschnitt (16) mit einem in Längsschnitt zur Längsachse (A) hin geneigten Anschlussbereich (16a) verjüngt.3. Pump according to claim 1 or 2, characterized in that the pump housing (12) tapers on both sides of a pipe section (14) through a neck section (16) with a connection region (16 a ) inclined in longitudinal section to the longitudinal axis (A).
4. Pumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Länge (q) des Anschlussbereiches (16a) etwa der Hälfte der Länge (n2) des Halsabschnitts (16) entspricht, der mit einem zur Längsachse (A) etwa parallelen Abschnitt endet. 4. Pump according to claim 3, characterized in that the length (q) of the connection region (16 a ) corresponds to approximately half the length (n 2 ) of the neck portion (16), which ends with a portion approximately parallel to the longitudinal axis (A) ,
5. Pumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass dem geneigten, vorzugsweise gekrümmt ausgebildeten Anschlussbereich (16a) des Pumpengehäuses (12) ein entsprechend geformter Stirnabschnitt (26) des Motorgehäuses (30) gegenüberliegt und mit diesem den Ringraum5. Pump according to claim 3 or 4, characterized in that the inclined, preferably curved connection area (16 a ) of the pump housing (12) is opposite a correspondingly shaped end portion (26) of the motor housing (30) and with this the annular space
(50) begrenzt.(50) limited.
6. Pumpe nach Anspruch 5, dadurch gekennzeichnet, dass der Stirnabschnitt (26) des Motorgehäuses (30) der Nabe (42) des Pumpenlaufrades (46) benachbart ist.6. Pump according to claim 5, characterized in that the end portion (26) of the motor housing (30) of the hub (42) of the pump impeller (46) is adjacent.
7. Pumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Ringraum (50) durch achsparallele Leitwände (58) in Strömungskanäle unterteilt ist.7. Pump according to one of claims 1 to 6, characterized in that the annular space (50) by axially parallel guide walls (58) is divided into flow channels.
8. Pumpe nach Anspruch 7, dadurch gekennzeichnet, dass die Leitwände (58) radiale Rippen eines Mittelrohres (28) des Motorgehäuses (30) und/oder des Rohrabschnittes8. Pump according to claim 7, characterized in that the guide walls (58) radial ribs of a central tube (28) of the motor housing (30) and / or the pipe section
(14) des Pumpengehäuses (12) sind.(14) of the pump housing (12).
9. Pumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Pumpenwelle (20) Wälzlager (22) durchsetzt, die in axialen Stutzen (24) des Motorgehäuses (30) gelagert sind.9. Pump according to one of claims 1 to 8, characterized in that the pump shaft (20) passes through roller bearings (22) which are mounted in axial connecting pieces (24) of the motor housing (30).
10. Pumpe nach Anspruch 9, dadurch gekennzeichnet, dass der axiale Stutzen (24) Teil des Stirnabschnitts (26) des Motorgehäuses (30) ist.10. Pump according to claim 9, characterized in that the axial connection piece (24) is part of the end section (26) of the motor housing (30).
11. Pumpe nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der Stutzen (24) neben dem Wälzlager (22) einen Dichtungseinsatz (32) und/oder Wellendichtungen (38) und/oder eine Wellenschutzhülse (36) umfängt.11. Pump according to claim 9 or 10, characterized in that the connecting piece (24) in addition to the roller bearing (22) includes a sealing insert (32) and / or shaft seals (38) and / or a shaft protection sleeve (36).
12. Pumpe nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass dem Stutzen (24) und/oder dem Dichtungseinsatz (32) ein Dichtungsdeckel (34) vorgesetzt ist. 12. Pump according to one of claims 9 to 11, characterized in that the connecting piece (24) and / or the sealing insert (32) is preceded by a sealing cover (34).
13. Pumpe nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass der Stirnabschnitt (26) des Motorgehäuses (30) mit dem Halsabschnitt (16) des Pumpengehäuses (12) durch stabähnliche Streben (25, 25a) fest verbunden, bevorzugt einstückig angeformt, ist.13. Pump according to one of claims 10 to 12, characterized in that the end portion (26) of the motor housing (30) with the neck portion (16) of the pump housing (12) by rod-like struts (25, 25 a ) fixed, preferably in one piece molded, is.
14. Pumpe nach Anspruch 13, gekennzeichnet durch hohle radiale Streben (25, 25a) .14. Pump according to claim 13, characterized by hollow radial struts (25, 25 a ).
15. Pumpe nach Anspruch 13 oder 14, dadurch gekennzeichnet, dass wenigstens eine Strebe (25a) einen Leckagekanal15. Pump according to claim 13 or 14, characterized in that at least one strut (25 a ) has a leakage channel
(39) enthält, der einends an der Pumpenwelle (20) endet .(39) contains one end of the pump shaft (20).
16. Pumpe nach einem der Ansprüche 5 bis 15, dadurch gekennzeichnet, dass das dem Pumpenlaufrad (46) ferne Ende der Pumpenwelle (20) von einer Deckkappe (48) übergriffen und diese an den Stirnabschnitt (26) des Motorgehäuses (30) angefügt ist.16. Pump according to one of claims 5 to 15, characterized in that the pump impeller (46) distal end of the pump shaft (20) overlapped by a cover cap (48) and this is attached to the end portion (26) of the motor housing (30) ,
17. Pumpe nach Anspruch 16, gekennzeichnet durch einen die freie Stirn der Pumpenwelle (20) übergreifenden Endlagerdeckel (47) .17. Pump according to claim 16, characterized by a free end of the pump shaft (20) overlapping end cap (47).
18. Pumpe nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass an beiden Enden der Pumpenwelle (20) jeweils ein Pumpenlaufrad (48) angeschlossen ist.18. Pump according to one of claims 1 to 15, characterized in that a pump impeller (48) is connected to both ends of the pump shaft (20).
19. Pumpe nach Anspruch 18, gekennzeichnet durch eine die axiale Mitte des Pumpengehäuses (12) durchgreifende Symmetrieebene (E) für die Pumpe (11) .19. Pump according to claim 18, characterized by a through the axial center of the pump housing (12) through the plane of symmetry (E) for the pump (11).
20. Pumpe nach wenigstens einem der Ansprüche 1 bis 19, gekennzeichnet durch wenigstens ein weiteres der Zeichnung und/oder Beschreibung entnehmbares Merkmal. 20. Pump according to at least one of claims 1 to 19, characterized by at least one further feature of the drawing and / or description.
EP03731690A 2002-01-25 2003-01-22 Pump with a pump shaft which extends through a drive motor Expired - Lifetime EP1468189B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20201183U DE20201183U1 (en) 2002-01-25 2002-01-25 Pump with a pump shaft passing through a drive motor
DE20201183U 2002-01-25
PCT/EP2003/000580 WO2003062642A1 (en) 2002-01-25 2003-01-22 Pump with a pump shaft which extends through a drive motor

Publications (2)

Publication Number Publication Date
EP1468189A1 true EP1468189A1 (en) 2004-10-20
EP1468189B1 EP1468189B1 (en) 2007-07-04

Family

ID=7967008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03731690A Expired - Lifetime EP1468189B1 (en) 2002-01-25 2003-01-22 Pump with a pump shaft which extends through a drive motor

Country Status (6)

Country Link
EP (1) EP1468189B1 (en)
AT (1) ATE366368T1 (en)
DE (3) DE20201183U1 (en)
DK (1) DK1468189T3 (en)
ES (1) ES2290467T3 (en)
WO (1) WO2003062642A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054027A1 (en) * 2005-11-10 2007-05-16 Pierburg Gmbh fluid pump
DE102005054060A1 (en) * 2005-11-10 2007-05-16 Pierburg Gmbh fluid pump
DE102005054026A1 (en) * 2005-11-10 2007-05-16 Pierburg Gmbh fluid pump
DE102013222170A1 (en) 2013-10-31 2015-04-30 Volkswagen Aktiengesellschaft Turbomachine and a fixable on a shaft of the turbomachine shaft sleeve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033032B (en) * 1952-09-02 1958-06-26 Gendron Freres S A Circulation pump, especially for central heating
DE1528640B2 (en) * 1965-08-31 1976-04-22 Allweiler Ag, 7760 Radolfzell STORAGE OF A RUNNER OF A PLUG-LESS HEATING CIRCULATION PUMP
FR2222885A5 (en) * 1973-03-23 1974-10-18 Lucas Industries Ltd
JP3077490B2 (en) * 1993-12-28 2000-08-14 株式会社荏原製作所 Pump assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03062642A1 *

Also Published As

Publication number Publication date
EP1468189B1 (en) 2007-07-04
DE50307609D1 (en) 2007-08-16
DE10302177A1 (en) 2003-07-31
DK1468189T3 (en) 2007-11-05
DE20201183U1 (en) 2002-07-04
ATE366368T1 (en) 2007-07-15
WO2003062642A1 (en) 2003-07-31
ES2290467T3 (en) 2008-02-16

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