EP3673178B1 - Pipe axial pump - Google Patents

Pipe axial pump Download PDF

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Publication number
EP3673178B1
EP3673178B1 EP18758843.9A EP18758843A EP3673178B1 EP 3673178 B1 EP3673178 B1 EP 3673178B1 EP 18758843 A EP18758843 A EP 18758843A EP 3673178 B1 EP3673178 B1 EP 3673178B1
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EP
European Patent Office
Prior art keywords
pump
impeller
motor
pipe axial
liquid
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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.)
Active
Application number
EP18758843.9A
Other languages
German (de)
French (fr)
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EP3673178A1 (en
Inventor
Benjamin Keck
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.)
Voith Patent GmbH
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Voith Patent 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
Priority to DE102017119241.7A priority Critical patent/DE102017119241A1/en
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to PCT/EP2018/071994 priority patent/WO2019038130A1/en
Publication of EP3673178A1 publication Critical patent/EP3673178A1/en
Application granted granted Critical
Publication of EP3673178B1 publication Critical patent/EP3673178B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0653Units comprising pumps and their driving means the pump being electrically driven the motor being flooded
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/04Shafts or bearings, or assemblies thereof
    • F04D29/046Bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/06Lubrication
    • F04D29/061Lubrication especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/181Axial flow rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/528Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/54Fluid-guiding means, e.g. diffusers
    • F04D29/548Specially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00Axial-flow pumps
    • F04D3/005Axial-flow pumps with a conventional single stage rotor

Description

  • Die vorliegende Erfindung betrifft eine Rohr-Axialpumpe für den Einbau in ein Rohr- bzw. Stollensystem.The present invention relates to a pipe axial pump for installation in a pipe or tunnel system.
  • Die aus dem Stand der Technik bekannten Rohr-Axialpumpen sind dadurch gekennzeichnet, dass der Antrieb des Pumpenlaufrades außerhalb des wassergeführten Bereichs angeordnet ist. Eine solche Rohr-Axialpumpe geht beispielsweise aus der CH 150076 hervor. Dies macht eine gedichtete Durchführung der Pumpenwelle und ein Winkelgetriebe oder eine bogenförmige Anordnung des wasserführenden Teiles der Pumpe notwendig.The axial tube pumps known from the prior art are characterized in that the drive of the pump impeller is arranged outside the water-bearing area. Such a tube axial pump goes, for example, from the CH 150076 emerged. This makes a sealed implementation of the pump shaft and an angular gear or an arcuate arrangement of the water-carrying part of the pump necessary.
  • Die CH-A-287346 offenbart eine Rohr-Axialpumpe zum Pumpen einer Flüssigkeit mit einem Motor, einem Laufrad, Traversen, einem Pumpengehäuse und zwei Lagern. Auch bei dieser Pumpe ist der Motor außerhalb des von der Flüssigkeit durchströmten Bereiches angeordnet.The CH-A-287346 discloses a tubular axial flow pump for pumping a liquid with a motor, an impeller, traverses, a pump housing and two bearings. In this pump, too, the motor is arranged outside the area through which the liquid flows.
  • Die US-A-4213745 offenbart eine Rohr-Axialpumpe zum Pumpen einer Flüssigkeit mit einem Motor, einem Laufrad, einer Vielzahl von Traversen, einem Pumpengehäuse und zwei Lagern.The US-A-4213745 discloses a tubular axial flow pump for pumping a liquid with a motor, an impeller, a plurality of cross members, a pump housing and two bearings.
  • Der Erfinder hat sich die Aufgabe gestellt, eine Rohr-Axialpumpe anzugeben, die ohne größere bauliche Veränderungen der bestehenden Anlagenstruktur in ein bestehenden Rohr- bzw. Stollensystem integriert werden kann. Außerdem zeichnet sich die erfindungsgemäße Rohr-Axialpumpe durch Wartungsfreiheit und Umweltfreundlichkeit aus, da die erfindungsgemäße Rohr-Axialpumpe frei von wassergefährdenden Stoffen ist. Außerdem hat sich der Erfinder die Aufgabe gestellt, eine Rohr-Axialpumpe anzugeben, die verbesserte Lagereigenschaften aufweist.The inventor set himself the task of specifying an axial pipe pump which can be integrated into an existing pipe or tunnel system without major structural changes to the existing system structure. In addition, the tubular axial pump according to the invention is distinguished by freedom from maintenance and environmental friendliness, since the tubular axial pump according to the invention is free from substances hazardous to water. In addition, the inventor has set himself the task of specifying an axial tube pump that has improved bearing properties.
  • Der Erfinder hat erkannt, dass die gestellte Aufgabe durch eine Rohr-Axialpumpe mit den Merkmalen des Anspruchs 1 gelöst werden kann. Vorteilhafte Ausführungsformen ergeben sich aus den von Anspruch 1 abhängigen Unteransprüchen.The inventor has recognized that the problem posed can be achieved by an axial tube pump with the features of claim 1. Advantageous embodiments emerge from the subclaims dependent on claim 1.
  • Die erfindungsgemäße Lösung wird nachfolgend anhand von Figuren erläutert. Darin ist im Einzelnen folgendes dargestellt:
  • Figur 1
    Erfindungsgemäße Rohr-Axialpumpe;
    Figur 2
    Erfindungsgemäße Rohr-Axialpumpe im Schnitt.
    The solution according to the invention is explained below with reference to figures. The following is shown in detail:
    Figure 1
    Tube axial pump according to the invention;
    Figure 2
    Tube axial pump according to the invention in section.
  • Figur 1 zeigt eine erfindungsgemäße Rohr-Axialpumpe. Dabei ist das Pumpengehäuse, welches mit 3 bezeichnet ist, angeschnitten, um den Blick auf die darunter liegende Pumpe freizugeben. Die Pumpe umfasst ein Laufrad, welches mit 1 bezeichnet ist. Das Laufrad 1 ist in einer dasselbe umschlingenden Laufradkammer angeordnet, welche mit 2 bezeichnet ist. Die Laufradkammer 2 ist Teil des Pumpengehäuses und kann kugelförmig oder zylinderförmig sein. Im ersten Fall ist die Laufradkammer 2 geteilt. Die Pumpe umfasst ferner einen Motor, welcher mit 4 bezeichnet und von einem Motorgehäuse umschlossen ist. Das Laufrad 1 ist so mit dem Motor 4 verbunden, dass es von diesem angetrieben werden kann, und umfasst eine Nabe und eine Vielzahl von Laufschaufeln. Die Laufschaufeln können starr oder drehbar gelagert mit der Nabe des Laufrades 1 verbunden sein. Der Motor 4 kann so ausgebildet sein, dass er mit konstanter oder variabler Drehzahl rotieren kann. Die Einheit aus Motor 4 und Laufrad 1 wird durch eine Vielzahl von sogenannten Traversen zentrisch im Pumpengehäuse 3 gehalten, wobei eine der Traversen mit 5 bezeichnet ist. Das Pumpengehäuse 3, welches die Pumpe umschlingt, ist im Wesentlichen röhrenförmig, wobei der Durchmesser dieser Röhre nicht konstant sein muss, und hat eine erste Öffnung zur Aufnahme der zu pumpenden Flüssigkeit, welche sich in der Nähe des Laufrades 1 befindet, und eine zweite Öffnung zur Abgabe der zu pumpenden Flüssigkeit, welche sich in der Nähe des Motors 4 befindet. Die Traversen 5 stützen sich außen am Pumpengehäuse 3 und innen am Motorgehäuse ab. Die während dem Betrieb von der ersten Öffnung in die Pumpe einströmende Flüssigkeit erhält beim Passieren des Laufrades einen gewissen Drall. Die Traversen sind dabei so ausgebildet, dass sie den Drall der Flüssigkeit reduzieren können. Das Motorgehäuse wird während dem Betrieb vom der zu pumpenden Flüssigkeit umströmt. Die beiden Öffnungen des Pumpengehäuses 3 können kreisförmig ausgebildet sein, was die Integration der Axialpumpe in ein bestehendes Röhrensystem erleichtert. Bei anderen Einbausituationen, können die Öffnungen jedoch auch andere Querschnittsformen aufweisen. Das Pumpengehäuse 3 kann Einrichtungen aufweisen, die eine Abstützung der Pumpe auf dem Untergrund oder ein Aufhängen der Pumpe an geeigneten Tragstrukturen ermöglichen. Figure 1 shows an axial tube pump according to the invention. The pump housing, which is denoted by 3, is cut in order to reveal the pump below. The pump comprises an impeller, which is designated by 1. The impeller 1 is arranged in an impeller chamber that wraps around the same and is denoted by 2. The impeller chamber 2 is part of the pump housing and can be spherical or cylindrical. In the first case, the impeller chamber 2 is divided. The pump further comprises a motor, which is denoted by 4 and is enclosed by a motor housing. The impeller 1 is connected to the motor 4 in such a way that it can be driven thereby and comprises a hub and a plurality of rotor blades. The rotor blades can be connected to the hub of the impeller 1 in a rigid or rotatable manner. The motor 4 can be designed so that it can rotate at a constant or variable speed. The unit of motor 4 and impeller 1 is held centrally in the pump housing 3 by a large number of so-called cross members, one of the cross members being denoted by 5. The pump housing 3, which surrounds the pump, is essentially tubular, the diameter of this tube need not be constant, and has a first opening for receiving the liquid to be pumped, which is located in the vicinity of the impeller 1, and a second opening for dispensing the liquid to be pumped, which is located in the vicinity of the motor 4. The cross members 5 are supported on the outside on the pump housing 3 and on the inside on the motor housing. The one flowing into the pump from the first opening during operation Liquid gets a certain twist when it passes the impeller. The traverses are designed in such a way that they can reduce the swirl of the liquid. The liquid to be pumped flows around the motor housing during operation. The two openings of the pump housing 3 can be circular, which facilitates the integration of the axial pump into an existing tube system. In other installation situations, however, the openings can also have other cross-sectional shapes. The pump housing 3 can have devices that enable the pump to be supported on the ground or to be suspended from suitable support structures.
  • Figur 3 zeigt eine erfindungsgemäße Rohr-Axialpumpe im Längsschnitt, welcher den Einblick in das Motorgehäuse ermöglicht. Der Motor 4 weist zwei Lager auf. Ein erstes Lager, welches mit 61 bezeichnet ist, ist als kombiniertes Spur- und Führungslager ausgebildet und zwischen dem Laufrad 1 und dem Läufer des Motors 4 angeordnet. Ein zweites Lager, welches mit 62 bezeichnet ist, ist als Führungslager ausgebildet und am vom Laufrad 1 abgewandten Ende des Motorgehäuses angeordnet. Beide Lager 61 und 62 werden durch die zu pumpende Flüssigkeit geschmiert, was dadurch ermöglicht wird, dass das Motorgehäuse nicht gegen die das Motorgehäuse umströmende Flüssigkeit gedichtet ist, so dass das Motorgehäuse von der zu pumpenden Flüssigkeit gefüllt ist. Dadurch wird eine Schmierung durch Öl vermieden, das potentiell die zu pumpende Flüssigkeit kontaminieren könnte. Dadurch kann die erfindungsgemäße Axial-Rohrpumpe auch zum Pumpen von Trinkwasser benutzt werden.FIG. 3 shows an axial tube pump according to the invention in a longitudinal section, which enables a view into the motor housing. The motor 4 has two bearings. A first bearing, which is designated by 61, is designed as a combined track and guide bearing and is arranged between the impeller 1 and the rotor of the motor 4. A second bearing, which is designated by 62, is designed as a guide bearing and is arranged at the end of the motor housing facing away from the impeller 1. Both bearings 61 and 62 are lubricated by the liquid to be pumped, which is made possible by the fact that the motor housing is not sealed against the liquid flowing around the motor housing, so that the motor housing is filled with the liquid to be pumped. This avoids lubrication by oil, which could potentially contaminate the liquid to be pumped. As a result, the axial tube pump according to the invention can also be used for pumping drinking water.
  • Dadurch dass der Motor 4, der das Laufrad 1 antreibt, innerhalb des die Flüssigkeit führenden Bereiches angeordnet ist, wird eine nach außen geführte Pumpenwelle samt der damit verbundenen Abdichtung der Drehdurchführung überflüssig. Es müssen lediglich die Steuer- und Leistungskabel nach außen geführt werden. Auch wird keine bogenförmige Anordnung des flüssigkeitsführenden Teiles der Pumpe benötigt, wodurch die erfindungsgemäße Pumpe wesentlich kleiner und kompakter ausgebildet ist als vergleichbare klassische Axialpumpen. Die erfindungsgemäße Pumpe kann dadurch leicht in ein bestehendes Rohr- bzw. Stollensystem ohne große bauliche Veränderungen integriert werden. Durch die Schmierung mit der zu pumpenden Flüssigkeit ist die Pumpe weitestgehend wartungsfrei und umweltfreundlich. Für den Wartungsfall kann die gesamte Pumpe in einem Stück oder in Teilen ausgebaut und überholt werden.Because the motor 4, which drives the impeller 1, is arranged within the area carrying the liquid, an outwardly guided pump shaft together with the associated sealing of the rotary leadthrough is superfluous. Only the control and power cables have to be routed to the outside. There is also no arched arrangement of the fluid-carrying part of the pump required, whereby the pump according to the invention is made much smaller and more compact than comparable classic axial pumps. The pump according to the invention can thus easily be integrated into an existing pipe or tunnel system without major structural changes. As it is lubricated with the liquid to be pumped, the pump is largely maintenance-free and environmentally friendly. In the event of maintenance, the entire pump can be removed and overhauled in one piece or in parts.
  • Je nach Anwendungsfall kann die erfindungsgemäße Pumpe in jedem beliebigen Winkel in ein bestehendes oder neues Rohr- bzw. Stollensystem eingebaut werden. Dabei ist es möglich den Flüssigkeitsein- bzw. austritt aus der Rohr-Axialpumpe entsprechend dem Einsatzfall anzupassen (Flanschverbindung, Direktanbindung zum bestehendem Rohr- bzw. Stollensystem, etc.).Depending on the application, the pump according to the invention can be installed at any desired angle in an existing or new pipe or tunnel system. It is possible to adapt the liquid inlet or outlet from the axial pipe pump according to the application (flange connection, direct connection to the existing pipe or tunnel system, etc.).
  • Als eine mögliche Anwendung der erfindungsgemäßen Rohr-Axialpumpe sei der Einbau der Pumpe in horizontaler Ausführung in ein Trinkwasserpumpenwerk zum Erhöhen des Ansaugdruckes der Hauptpumpen genannt.One possible application of the tubular axial pump according to the invention is the installation of the pump in a horizontal design in a drinking water pump system to increase the suction pressure of the main pumps.

Claims (11)

  1. Pipe axial-flow pump for pumping a liquid, comprising a rotatably mounted impeller (1), a tubular pump housing (3), a multiplicity of crossmembers (5), and a motor (4) which is enclosed by a motor housing, wherein the impeller (1) comprises a hub and a multiplicity of hub-connected blades, and wherein the pump housing (3) comprises an impeller chamber (2), a first opening for receiving the liquid to be pumped, and a second opening for discharging the liquid to be pumped, and wherein the impeller chamber (2) wraps around the impeller (1), the first opening is arranged in the vicinity of the impeller (1), and the second opening is arranged in the vicinity of the motor (4), wherein the motor (4) is connected to the impeller (1) in such a way that it can drive the latter, and the motor (4) comprises a guide bearing (62), and wherein the motor (4) is situated within the liquid-traversed region of the pump, wherein the unit consisting of the motor (4) and impeller (1) is held centrally in the pump housing (3) by means of the crossmembers (5), and wherein, during the operation of the pump, the motor housing is filled with the liquid to be pumped and has the latter flowing around it, with the result that the two bearings (61, 62) can be lubricated with the liquid, and wherein the crossmembers (5) are designed in such a way that they reduce a swirl of the liquid passing through the impeller (1) during the operation of the pump, characterized in that the motor (4) comprises a combined thrust and guide bearing (61), wherein the combined thrust and guide bearing (61) is arranged between the impeller (1) and the motor rotor, and the guide bearing (62) is arranged at the opposite end of the motor housing to the impeller (1) .
  2. Pipe axial-flow pump according to Claim 1, wherein the blades are rigidly connected to the hub.
  3. Pipe axial-flow pump according to Claim 1, wherein the blades are connected to the hub in rotatably mounted fashion.
  4. Pipe axial-flow pump according to one of Claims 1 to 3, wherein the impeller chamber is cylindrically shaped.
  5. Pipe axial-flow pump according to one of Claims 1 to 3, wherein the impeller chamber is ball-shaped and split.
  6. Pipe axial-flow pump according to one of Claims 1 to 5, wherein openings in the pump housing (3) have a circular cross section.
  7. Pipe axial-flow pump according to one of Claims 1 to 6, wherein the motor (4) is designed in such a way that it can drive the impeller (1) at a constant rotational speed.
  8. Pipe axial-flow pump according to one of Claims 1 to 6, wherein the motor (4) is designed in such a way that it can drive the impeller (1) at a variable rotational speed.
  9. Pipe axial-flow pump according to one of Claims 1 to 8, wherein the pump housing (3) has devices which allow the pump to be supported on the underlying surface.
  10. Pipe axial-flow pump according to one of Claims 1 to 8, wherein the pump housing (3) has devices which allow the pump to be suspended from suitable supporting structures.
  11. Pipe axial-flow pump according to one of Claims 1 to 10, wherein the liquid to be pumped is drinking water.
EP18758843.9A 2017-08-23 2018-08-14 Pipe axial pump Active EP3673178B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102017119241.7A DE102017119241A1 (en) 2017-08-23 2017-08-23 Pipe-axial pump
PCT/EP2018/071994 WO2019038130A1 (en) 2017-08-23 2018-08-14 Pipe axial pump

Publications (2)

Publication Number Publication Date
EP3673178A1 EP3673178A1 (en) 2020-07-01
EP3673178B1 true EP3673178B1 (en) 2021-05-12

Family

ID=63311995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18758843.9A Active EP3673178B1 (en) 2017-08-23 2018-08-14 Pipe axial pump

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Country Link
US (1) US20200224666A1 (en)
EP (1) EP3673178B1 (en)
CN (1) CN111051700B (en)
CA (1) CA3073461A1 (en)
DE (1) DE102017119241A1 (en)
WO (1) WO2019038130A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213745A (en) * 1978-09-11 1980-07-22 Roberts Samuel A Pump for central heating system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH113223A (en) * 1925-04-06 1926-05-17 Oscar Simmen Electrically powered conveyor.
GB250177A (en) * 1925-04-06 1926-07-08 Oscar Simmen Improvements in or relating to electrically driven rotary pumps
CH150076A (en) 1930-08-06 1931-10-15 Escher Wyss Maschf Ag Centrifugal machine with rotating blades.
CH287346A (en) * 1950-04-14 1952-11-30 E M B Elektromotorenbau Ag Bir Device for compensating the axial thrusts exerted on the shaft carrying the impeller of a pump serving as an accelerator of a circulating liquid.
US5102308A (en) * 1990-09-14 1992-04-07 Thomas Bordelon Axial flow pump
DE4427737C2 (en) * 1994-08-05 1997-03-20 Koester Friedrich Gmbh & Co Kg Pump with a drive motor
JP2005127226A (en) * 2003-10-24 2005-05-19 Hitachi Industries Co Ltd Drain pump and submerged bearing device
JP4557536B2 (en) * 2003-12-05 2010-10-06 新明和工業株式会社 Pump device
CN101112628A (en) * 2006-11-30 2008-01-30 中国医学科学院阜外心血管病医院 Miniature implantable axial flow type assistant blood pump for heart
JP4844414B2 (en) * 2007-01-31 2011-12-28 株式会社日立プラントテクノロジー Tubular pump
CN201339585Y (en) * 2009-01-12 2009-11-04 贾良成 Open-type axial flow pump
CN202250889U (en) * 2011-10-10 2012-05-30 鹰潭三川水泵有限公司 Vertical axial flow pump used for pumping sea water
JP5602122B2 (en) * 2011-12-13 2014-10-08 日立Geニュークリア・エナジー株式会社 Slide bearing and pump device using the same
DE102012212423A1 (en) * 2012-07-16 2014-01-16 Mahle International Gmbh Liquid pump used as oil pump or coolant pump for internal combustion engine of motor car, pumps liquid from pump unit in axial direction so as to cool the stator and stator windings of electromotor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213745A (en) * 1978-09-11 1980-07-22 Roberts Samuel A Pump for central heating system

Also Published As

Publication number Publication date
EP3673178A1 (en) 2020-07-01
WO2019038130A1 (en) 2019-02-28
US20200224666A1 (en) 2020-07-16
DE102017119241A1 (en) 2019-02-28
CN111051700B (en) 2021-06-22
CA3073461A1 (en) 2019-02-28
CN111051700A (en) 2020-04-21

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