EP0070438A1 - In-line centrifugal pump - Google Patents

In-line centrifugal pump Download PDF

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Publication number
EP0070438A1
EP0070438A1 EP82105908A EP82105908A EP0070438A1 EP 0070438 A1 EP0070438 A1 EP 0070438A1 EP 82105908 A EP82105908 A EP 82105908A EP 82105908 A EP82105908 A EP 82105908A EP 0070438 A1 EP0070438 A1 EP 0070438A1
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EP
European Patent Office
Prior art keywords
inlet
outlet
centrifugal pump
axis
flow
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.)
Ceased
Application number
EP82105908A
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German (de)
French (fr)
Inventor
Karsten Laing
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0070438A1 publication Critical patent/EP0070438A1/en
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0467—Spherical bearings
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/0633—Details of the bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4293—Details of fluid inlet or outlet

Definitions

  • the invention relates to centrifugal pumps in which the inlet and outlet openings are opposite one another.
  • the simplest types of centrifugal pumps have an inlet opening at the suction opening of the rotor and thus in an extension of the pump axis, while the outlet nozzle emerges tangentially from the volute casing.
  • This arrangement not only leads to a perpendicular deflection of the delivery flow but also to an offset of the inlet and outlet lines to one another.
  • a modified form are spiral housings, in which the inlet and outlet lines are in the same plane as the axis of the pump.
  • In-line designs are particularly common in heating pumps, in which the inlet and outlet connections are opposite one another and are perpendicular to the pump axis.
  • the disadvantage of this embodiment is that the distance between the connecting pieces is comparatively large.
  • a third variant has been added to the shaft-sealed centrifugal pumps and the canned pumps, centrifugal pumps driven by a pole ring, which is hermetically separated from the drive device, a stator or a circumferential magnetic ring by a spherical partition.
  • the rotors of these pumps no longer have shafts but form them with a pole ring with a spherical surface and are only supported by a ball and a spherical pan.
  • These supports are particularly suitable for pumps with a vertical axis, since the supporting bearing of the entire periphery is then evenly loaded.
  • the invention relates to in-line pumps in which the axes of the inlet and outlet ports and the pump rotor lie in one plane and run parallel to one another.
  • This arrangement makes pumps with extremely short installation dimensions between the inlet and outlet connections possible.
  • this principle enables the vertical arrangement of the pump axis in heating pumps, in which the flow rate is generally vertical.
  • FIG. 1a shows the view of a pump according to the invention, in which the flow according to arrow (1) enters, enters the impeller through the intake manifold (2) and leaves the pump again through the spiral housing (3) according to arrow (4). Due to the arrangement according to the invention, the distance (5) between the inlet flange (6) and the outlet flange (6 ') can be selected to be extremely small.
  • Figure 1b shows the pump in plan view.
  • FIG. 2a shows a pump according to the invention with a spherical motor in section.
  • the inlet stream (20) which leads via the channel (21) into the rotor mouth (22), intersect with the outlet stream, which leaves the volute casing (23) through the outlet line (24).
  • the flow is then passed through a valve opening (25) which is kept closed by a valve plate (26) which is articulated on a spring (27).
  • the outlet line (28) is expanded in the area of the valve plate. The flow leaves the pump according to arrow (29).
  • the motor (30) is arranged vertically with the stator (31) pointing downwards, the otherwise necessary equality of weight between the pole ring region (32) and the paddle wheel (33), which is necessary in the case of spherical motors, is based on the support surface between the bearing ball (34) and the Bearing pan (36) not required.
  • the bearing ball (34) is in contact with the bearing pan (36) along the entire periphery (35), which enables practically wear-free operation.

Abstract

Wellenlose Kreiselpumpen weisen besonders günstige Laufeigenschaften bei vertikalem Einbau auf. Damit aber auch der Förderstrom vertikal verlaufen kann, bilden die Anschlußstutzen (2, 3) Krümmer, deren Enden (6, 6') in eine vertikale Rohrleitung eingebunden werden können.Shaftless centrifugal pumps have particularly good running properties when installed vertically. So that the flow can also run vertically, the connecting pieces (2, 3) form elbows, the ends (6, 6 ') of which can be integrated into a vertical pipeline.

Description

Die Erfindung bezieht sich auf Kreiselpumpen, bei denen die Eintritts- und Austrittsöffnungen einander gegenüber liegen. Die einfachsten Bauarten der Kreiselpumpen weisen eine Eintrittsöffnung an der Saugöffnung des Rotors und damit in Verlängerung der Pumpenachse auf, während der Austrittsstutzen tangential aus dem Spiralgehäuse heraustritt. Diese Anordnung führt nicht nur zu einer rechtwinkligen Umlenkung des Förderstroms sondern auch zum Versatz der Eintritts- und Austrittsleitungen zueinander. Eine abgewandelte Form bilden Spiralgehäuse, bei denen die Eintritts- und die Austrittsleitungen in der gleichen Ebene liegen, in der auch die Achse der Pumpe liegt. Insbesondere bei Heizungspumpen sind in-line Ausführungen üblich, bei denen die Ein- und Austrittsstutzen einander gegenüber liegen und senkrecht zur Pumpenachse verlaufen. Der Nachteil dieser Ausführungsform liegt darin, daß der Abstand zwischen den Stutzen vergleichsweise groß ist.The invention relates to centrifugal pumps in which the inlet and outlet openings are opposite one another. The simplest types of centrifugal pumps have an inlet opening at the suction opening of the rotor and thus in an extension of the pump axis, while the outlet nozzle emerges tangentially from the volute casing. This arrangement not only leads to a perpendicular deflection of the delivery flow but also to an offset of the inlet and outlet lines to one another. A modified form are spiral housings, in which the inlet and outlet lines are in the same plane as the axis of the pump. In-line designs are particularly common in heating pumps, in which the inlet and outlet connections are opposite one another and are perpendicular to the pump axis. The disadvantage of this embodiment is that the distance between the connecting pieces is comparatively large.

Zu den wellengedichteten Kreiselpumpen und den Spaltrohrpumpen ist eine dritte Variante hinzugetreten, Kreiselpumpen mit Antrieb durch einen Polring, der über eine sphärische Trennwand von der Antriebsvorrichtung, einem Stator oder einem umlaufenden Magnetring hermetisch getrennt ist.Die Läufer dieser Pumpen weisen keine Wellen mehr auf sondern bilden mit einem Polring mit sphärischer Oberfläche eine Einheit und sind lediglich noch durch eine Kugel und eine sphärische Pfanne abgestützt. Diese Abstützungen eignen sich besonders gut für Pumpen mit vertikal verlaufender Achse, da dann das abstützende Lager der gesamten Peripherie gleichmäßig belastet wird.A third variant has been added to the shaft-sealed centrifugal pumps and the canned pumps, centrifugal pumps driven by a pole ring, which is hermetically separated from the drive device, a stator or a circumferential magnetic ring by a spherical partition. The rotors of these pumps no longer have shafts but form them with a pole ring with a spherical surface and are only supported by a ball and a spherical pan. These supports are particularly suitable for pumps with a vertical axis, since the supporting bearing of the entire periphery is then evenly loaded.

Die Erfindung bezieht sich auf in-line Pumpen, bei denen die Achsen der Eintritts- und Austrittsstutzen und des Pumpenläufers in einer Ebene liegen und parallel zueinander verlaufen. Durch diese Anordnung sind Pumpen mit extrem kurzen Einbaumaßen zwischen Eintritts- und Austrittsstutzen möglich geworden, gleichzeitig ermöglicht dieses Prinzip die vertikale Anordnung der Pumpenachse bei Heizungspumpen, bei denen der Förderstrom in der Regel vertikal verläuft.The invention relates to in-line pumps in which the axes of the inlet and outlet ports and the pump rotor lie in one plane and run parallel to one another. This arrangement makes pumps with extremely short installation dimensions between the inlet and outlet connections possible. At the same time, this principle enables the vertical arrangement of the pump axis in heating pumps, in which the flow rate is generally vertical.

Die Erfindung soll anhand von Figuren beschrieben werden:

  • Figur 1 zeigt eine Pumpe mit nach unten gerichtetem Förderstrom.
  • Figur 2 zeigt eine Pumpe mit nach oben gerichtetem Förderstrom und einem eingebauten Rückschlagventil.
The invention will be described with reference to figures:
  • Figure 1 shows a pump with the flow directed downwards.
  • Figure 2 shows a pump with upward flow and a built-in check valve.

Figur 1a gibt die Ansicht einer erfindungsgemäßen Pumpe.wieder, bei der der Förderstrom gemäß Pfeil (1) eintritt, durch den Ansaugkrümmer (2) in das Laufrad eintritt und durch das Spiralgehäuse (3) gemäß Pfeil (4) die Pumpe wieder verläßt. Durch die erftndungsgemäße Anordnung kann der Abstand (5) zwischen dem Eintiittsflansch (6) und dem Austrittsflansch (6') extrem klein gewählt werden.FIG. 1a shows the view of a pump according to the invention, in which the flow according to arrow (1) enters, enters the impeller through the intake manifold (2) and leaves the pump again through the spiral housing (3) according to arrow (4). Due to the arrangement according to the invention, the distance (5) between the inlet flange (6) and the outlet flange (6 ') can be selected to be extremely small.

Figur 1b zeigt die Pumpe in der Draufsicht.Figure 1b shows the pump in plan view.

Figur 2a zeigt eine erfindungsgemäße Pumpe mit einem Kugelmotor im Schnitt. Bei dieser Pumpe kreuzen sich der Eintrittsstrom (20), der über den Kanal (21) in den Rotormund (22) hineinführt, mit dem Austrittsstrom, der das Spiralgehäuse (23) durch die Austrittsleitung (24) verläßt. Der Förderstrom wird dann durch eine Ventilöffnung (25) geleitet, die durch eine Ventilplatte (26), die an einer Feder (27) angelenkt ist, verschlossen gehalten wird. Im Bereich der Ventilplatte ist die Austrittsleitung (28) erweitert. Der Förderstrom verläßt gemäß Pfeil (29) die Pumpe. Da der Motor (30) senkrecht mit nach unten weisendem Stator (31) angeordnet ist, ist die sonst bei Kugelmotoren notwendige Gewichtsgleichheit zwischen dem Polringbereich (32) und dem Schaufelrad (33), bezogen auf die Unterstützungsfläche zwischen der Lagerkugel (34) und der Lagerpfanne (36) nicht erforderlich. Außerdem ist die Lagerkugel (34) längs der gesamten Peripherie (35) in Kontakt mit der Lagerpfanne (36), wodurch ein praktisch verschleißloser Betrieb ermöglicht wird.Figure 2a shows a pump according to the invention with a spherical motor in section. In this pump, the inlet stream (20), which leads via the channel (21) into the rotor mouth (22), intersect with the outlet stream, which leaves the volute casing (23) through the outlet line (24). The flow is then passed through a valve opening (25) which is kept closed by a valve plate (26) which is articulated on a spring (27). The outlet line (28) is expanded in the area of the valve plate. The flow leaves the pump according to arrow (29). Since the motor (30) is arranged vertically with the stator (31) pointing downwards, the otherwise necessary equality of weight between the pole ring region (32) and the paddle wheel (33), which is necessary in the case of spherical motors, is based on the support surface between the bearing ball (34) and the Bearing pan (36) not required. In addition, the bearing ball (34) is in contact with the bearing pan (36) along the entire periphery (35), which enables practically wear-free operation.

Claims (4)

Patentanspruch 1 Kreiselpumpe mit einem um eine Rotationsachse rotierenden Schaufelrad und einem Gehäuse, in welchem der Austrittsbereich des Schaufelrades liegt und das einen Austrittsstutzen aufweist,und eine Eintrittsöffnung besitzt, die einerseits mit dem Eintrittsbereich des Schaufelrades und andererseits mit einem Eintrittsstutzen kommuniziert, dadurch gekennzeichnet, daß der Eintrittsstutzen (6) und der Austrittsstutzen (6-) einander gegenüberliegen, sodaß der Eintrittsstrom (1, 20) und der Austrittsstrom (4, 29) in der Ebene verlaufen, in der die Achse des Motors (7) liegt, und daß die Eintrittsrichtung und die Austrittsrichtung parallel zur Pumpenachse verlaufen.Claim 1 centrifugal pump with a rotating impeller around an axis of rotation and a housing in which the outlet region of the impeller is located and which has an outlet connection and has an inlet opening which communicates on the one hand with the inlet region of the impeller and on the other hand with an inlet connection, characterized in that the inlet connection (6) and the outlet connection (6-) lie opposite each other, so that the inlet flow (1, 20) and the outlet flow (4, 29) run in the plane in which the axis of the motor (7) lies, and that the Entry direction and exit direction run parallel to the pump axis. Patentanspruch 2 Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der den Eintrittsstrom (20) führende Kanal den den Austrittsstrom (29) führenden Kanal kreuzt.Claim 2 Centrifugal pump according to Claim 1, characterized in that the channel carrying the inlet stream (20) crosses the channel carrying the outlet stream (29). Patentanspruch 3 Kreiselpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Durchsatzströmung durch eine Öffnung (25) geleitet wird, gegen die ein federbelastetes Ventilelement (26) gepreßt wird.Claim 3 centrifugal pump according to claim 1 or 2, characterized in that the flow rate is passed through an opening (25) against which a spring-loaded valve element (26) is pressed. Patentanspruch 4 Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß das Schaufelrad (33) in an sich bekannter Weise mit dem Polring (32) eine Einheit bildet, welche durch ein sphärisches Lager mit einem konvexen Lagerelement (35) und einem konkaven Lagerelement (36) gegen das Pumpengehäuse abgestützt ist.Claim 4 Centrifugal pump according to Claim 1, characterized in that the paddle wheel (33) forms, in a manner known per se, a unit with the pole ring (32) which is formed by a spherical bearing with a convex bearing element (35) and a concave bearing element (36) is supported against the pump housing.
EP82105908A 1981-07-17 1982-07-02 In-line centrifugal pump Ceased EP0070438A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813128305 DE3128305A1 (en) 1981-07-17 1981-07-17 IN-LINE CENTRIFUGAL PUMP
DE3128305 1981-07-17

Publications (1)

Publication Number Publication Date
EP0070438A1 true EP0070438A1 (en) 1983-01-26

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ID=6137153

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EP82105908A Ceased EP0070438A1 (en) 1981-07-17 1982-07-02 In-line centrifugal pump

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US (1) US4462752A (en)
EP (1) EP0070438A1 (en)
DE (1) DE3128305A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4728268A (en) * 1984-11-02 1988-03-01 Karsten Laing Rotodynamic pump
GB2249135A (en) * 1990-10-03 1992-04-29 Mars G B Ltd A centrifugal impeller
GB2272023B (en) * 1992-10-31 1996-05-01 Caradon Mira Ltd Improvements in or relating to ablutionary installations
US5520507A (en) * 1994-05-06 1996-05-28 Ingersoll-Rand Company Method and apparatus to achieve passive damping of flow disturbances in a centrifugal compressor to control compressor surge
DE19855845A1 (en) * 1998-12-03 2000-06-08 Gep Umwelttechnik Gmbh Self-priming motor pump unit
DE102005039557A1 (en) * 2005-08-22 2007-03-01 Robert Bosch Gmbh rotary pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB522743A (en) * 1938-12-14 1940-06-26 John Southern Improvements in and relating to rotary pump installations
US3649137A (en) * 1970-11-30 1972-03-14 Nikolaus Laing Centrifugal pump with magnetic coupling
FR2162869A5 (en) * 1971-10-25 1973-07-20 Pettersson Carl
FR2203446A5 (en) * 1972-09-13 1974-05-10 Vortex Pumpen Ag

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1644129A (en) * 1927-03-26 1927-10-04 Byron Jackson Pump Mfg Co Multistage balanced pump
US3485371A (en) * 1968-01-05 1969-12-23 Lawler Automatic Controls Inc Valve assembly
AT305778B (en) * 1970-09-11 1973-03-12 Standard Magnet Ag Centrifugal pump
US4043706A (en) * 1973-06-05 1977-08-23 Alan John Walker Bearing support structure for electro-magnet driven pump
US3877845A (en) * 1973-06-28 1975-04-15 Acf Ind Inc Electric in-tank fuel pump
CH583856A5 (en) * 1974-09-27 1977-01-14 Balzers Patent Beteilig Ag
AT335563B (en) * 1975-01-13 1977-03-25 Vortex Gmbh Dt PUMP-MOTOR UNIT

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB522743A (en) * 1938-12-14 1940-06-26 John Southern Improvements in and relating to rotary pump installations
US3649137A (en) * 1970-11-30 1972-03-14 Nikolaus Laing Centrifugal pump with magnetic coupling
FR2162869A5 (en) * 1971-10-25 1973-07-20 Pettersson Carl
FR2203446A5 (en) * 1972-09-13 1974-05-10 Vortex Pumpen Ag

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Publication number Publication date
DE3128305A1 (en) 1983-02-03
US4462752A (en) 1984-07-31

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