DE1122375B - Multi-stage centrifugal pump with overhung impellers - Google Patents

Multi-stage centrifugal pump with overhung impellers

Info

Publication number
DE1122375B
DE1122375B DEB57795A DEB0057795A DE1122375B DE 1122375 B DE1122375 B DE 1122375B DE B57795 A DEB57795 A DE B57795A DE B0057795 A DEB0057795 A DE B0057795A DE 1122375 B DE1122375 B DE 1122375B
Authority
DE
Germany
Prior art keywords
stage
centrifugal pump
stage centrifugal
overhung
pressure
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.)
Pending
Application number
DEB57795A
Other languages
German (de)
Inventor
Paul Bungartz
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
Priority to DEB57795A priority Critical patent/DE1122375B/en
Publication of DE1122375B publication Critical patent/DE1122375B/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps

Description

Mehrstufige Kreiselpumpe mit fliegend angeordneten Laufrädern Vorliegende Erfindung bezieht sich auf mehrstufige Kreiselpumpen mit fliegend angeordneten Förderrädern.Multistage centrifugal pump with overhung impellers The invention relates to multistage centrifugal pumps with overhung conveyor wheels.

Pumpen mit fliegend angeordneten Förderrädern haben den Vorteil, daß nur ein nach außen führender Wellenspalt abgedichtet werden muß.Pumps with overhung conveyor wheels have the advantage that only a shaft gap leading to the outside has to be sealed.

Um bei solchen Pumpen nur gegen einen möglichst geringen Differenzdruck abzudichten, ist vorgeschlagen worden, die Flüssigkeitszuführung zwischen der Wellendichtung und dem ersten Förderrad anzuordnen. Diese Ausführung hat besonders den Nachteil, daß der Abstand zwischen Lager und Schwerpunkt des Läufers groß wird und außerdem die Abdichtung bei an der Saugseite auftretendem Unterdruck schwierig wird.In order to only counteract the lowest possible differential pressure in such pumps to seal, it has been proposed to the liquid supply between the shaft seal and to arrange the first conveyor wheel. This version has the particular disadvantage that the distance between the bearing and the center of gravity of the runner is large and also the seal becomes difficult when there is negative pressure on the suction side.

Besonders diese Nachteile werden durch vorliegende Erfindung behoben. Sie beruht im wesentlichen darauf, daß das Förderrad der ersten Druckstufe unmittelbar an der Wellendurchtrittsöffnung angeordnet und dessen Saugmund durch die nachfolgenden Stufen hindurchgeführt ist.These disadvantages in particular are eliminated by the present invention. It is based essentially on the fact that the feed wheel of the first pressure stage is immediate arranged on the shaft opening and its suction mouth through the following Stages is passed through.

Das in der Zeichnung dargestellte Ausführungsbeispiel zeigt eine zweistufige Pumpe. Das Förderrad a der ersten Stufe ist unmittelbar an der Gehäusedurchtrittsöffnung wie bei einer normalen einstufigen Pumpe angeordnet. Am Saugmund des Förderrades a ist das Förderrad b der zweiten Stufe angeordnet. Der Saugmund des Förderrades b ist durch eine Umleitung u mit dem Druckstutzen der ersten Stufe verbunden. Durch diese Schaltung ist es möglich, für die einzelnen Stufen gleiche Pumpengehäuse zu verwenden. Die Pumpe kann aber auch ohne Verwendung des Laufrades b mit den gleichen Bauteilen als einstufige Pumpe verwendet werden.The embodiment shown in the drawing shows a two-stage Pump. The conveyor wheel a of the first stage is directly at the housing passage opening arranged like a normal single stage pump. At the suction mouth of the conveyor wheel a, the conveyor wheel b of the second stage is arranged. The suction mouth of the conveyor wheel b is connected to the pressure port of the first stage by a diversion u. By this circuit makes it possible to use the same pump housing for the individual stages use. The pump can, however, also without using the impeller b with the same Components can be used as a single-stage pump.

Eine Ausführung entsprechend der Erfindung hat besonders den Vorteil, daß der Abstand zwischen den Lagern und dem Schwerpunkt des Läufers sehr klein wird, so daß auch bei Anordnung mehrerer Stufen ein besonderes Lager am Saugstutzen der Pumpe vermieden werden kann. Außerdem kann zur Abdichtung des Wellenspaltes jede bekannte Wellendichtung, wie sie bei einstufigen Pumpen angewendet wird, angeordnet werden. Bei der dargestellten Ausführung ist der Wellenspalt beim Betrieb durch das Rückförderrad c abgedichtet, welches sowohl für Zulaufdruck als auch bei Unterdruck in der Zulaufleitung geeignet ist.An embodiment according to the invention has the particular advantage that the distance between the bearings and the center of gravity of the rotor becomes very small, so that even with the arrangement of several stages a special bearing on the suction port Pump can be avoided. In addition, each can be used to seal the shaft gap known shaft seal, as it is used in single-stage pumps, arranged will. In the embodiment shown, the shaft gap is through during operation the return wheel c sealed, which both for inlet pressure and under pressure in the feed line is suitable.

Claims (3)

PATENTANSPRÜCHE: 1. Mehrstufige Kreiselpumpe mit fliegend angeordneten Laufrädern, dadurch gekennzeichnet, daß das Laufrad der ersten Druckstufe unnüttelbar an der Wellendurchtrittsöffnung angeordnet und dessen Saugmund durch die Förderräder der nachfolgenden Stufen hindurchgeführt ist. PATENT CLAIMS: 1. Multi-stage centrifugal pump with overhung impellers, characterized in that the impeller of the first pressure stage is arranged so that it cannot be vibrated at the shaft opening and its suction mouth is passed through the conveyor wheels of the subsequent stages. 2. Mehrstufige Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Saugseite der letzten Druckstufe mit der Druckseite der ersten Stufe durch eine Umleitung verbunden ist. 2. Multi-stage centrifugal pump according to claim 1, characterized in that the suction side of the last pressure stage is connected to the pressure side of the first stage by a diversion. 3. Mehrstufige Kreiselpumpe nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Wellendurchtrittsöffnung beim Betrieb in an sich bekannter Weise durch Hilfsförderräder abgedichtet ist. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 641771; USA.-Patentschrift Nr. 2 859 698.3. Multi-stage centrifugal pump according to claim 1 and 2, characterized in that the shaft passage opening is sealed during operation in a manner known per se by auxiliary conveyor wheels. Documents considered: German Patent No. 641 771; U.S. Patent No. 2,859,698.
DEB57795A 1960-05-10 1960-05-10 Multi-stage centrifugal pump with overhung impellers Pending DE1122375B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB57795A DE1122375B (en) 1960-05-10 1960-05-10 Multi-stage centrifugal pump with overhung impellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB57795A DE1122375B (en) 1960-05-10 1960-05-10 Multi-stage centrifugal pump with overhung impellers

Publications (1)

Publication Number Publication Date
DE1122375B true DE1122375B (en) 1962-01-18

Family

ID=6971836

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB57795A Pending DE1122375B (en) 1960-05-10 1960-05-10 Multi-stage centrifugal pump with overhung impellers

Country Status (1)

Country Link
DE (1) DE1122375B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506398A1 (en) * 1981-05-19 1982-11-26 Neyrpic Multi-stage turbine-pump - has two separate single stages connected in series hydraulically by external pipework
EP0173030A3 (en) * 1984-07-26 1987-08-26 World Chemical Co., Ltd. A seal-less pump
WO2020030373A1 (en) * 2018-08-07 2020-02-13 Cryostar Sas Multi-stage turbomachine
EP3043073B1 (en) * 2015-01-08 2022-03-09 Garrett Transportation I Inc. Multistage radial compressor baffle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE641771C (en) * 1934-03-11 1937-02-12 Ulrich Meininghaus Dr Multi-stage centrifugal compressor
US2859698A (en) * 1956-03-21 1958-11-11 United States Steel Corp Centrifugal pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE641771C (en) * 1934-03-11 1937-02-12 Ulrich Meininghaus Dr Multi-stage centrifugal compressor
US2859698A (en) * 1956-03-21 1958-11-11 United States Steel Corp Centrifugal pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506398A1 (en) * 1981-05-19 1982-11-26 Neyrpic Multi-stage turbine-pump - has two separate single stages connected in series hydraulically by external pipework
EP0173030A3 (en) * 1984-07-26 1987-08-26 World Chemical Co., Ltd. A seal-less pump
EP3043073B1 (en) * 2015-01-08 2022-03-09 Garrett Transportation I Inc. Multistage radial compressor baffle
WO2020030373A1 (en) * 2018-08-07 2020-02-13 Cryostar Sas Multi-stage turbomachine
FR3084919A1 (en) * 2018-08-07 2020-02-14 Cryostar Sas MULTI-STAGE TURBOMACHINE
CN112424477A (en) * 2018-08-07 2021-02-26 克里奥斯塔股份有限公司 Multistage turbomachine
CN112424477B (en) * 2018-08-07 2023-09-08 克里奥斯塔股份有限公司 Multistage turbine

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