EP0045483A2 - Pompe rotative à auto-amorçage, notamment pour le pompage de fluides près de leur point d'ébullition - Google Patents

Pompe rotative à auto-amorçage, notamment pour le pompage de fluides près de leur point d'ébullition Download PDF

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Publication number
EP0045483A2
EP0045483A2 EP81105972A EP81105972A EP0045483A2 EP 0045483 A2 EP0045483 A2 EP 0045483A2 EP 81105972 A EP81105972 A EP 81105972A EP 81105972 A EP81105972 A EP 81105972A EP 0045483 A2 EP0045483 A2 EP 0045483A2
Authority
EP
European Patent Office
Prior art keywords
storage space
centrifugal pump
liquid
liquid storage
stage
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
EP81105972A
Other languages
German (de)
English (en)
Other versions
EP0045483B1 (fr
EP0045483A3 (en
Inventor
Wilfried Dr. Ing. Lehmann
Peter Ing.-Grad Fandrey
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.)
Sihi GmbH and Co KG
Original Assignee
Sihi GmbH and Co KG
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 Sihi GmbH and Co KG filed Critical Sihi GmbH and Co KG
Priority to AT81105972T priority Critical patent/ATE5433T1/de
Publication of EP0045483A2 publication Critical patent/EP0045483A2/fr
Publication of EP0045483A3 publication Critical patent/EP0045483A3/de
Application granted granted Critical
Publication of EP0045483B1 publication Critical patent/EP0045483B1/fr
Expired 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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/003—Regenerative pumps of multistage type
    • F04D5/006—Regenerative pumps of multistage type the stages being axially offset

Definitions

  • the invention relates to a centrifugal pump with a first normal-suction centrifugal pump stage arranged on the suction side, a pump suction nozzle lying axially at shaft height and at least one downstream self-priming centrifugal pump stage working with auxiliary liquid.
  • Pumps of this type are known, in particular for conveying media close to their boiling point, for example liquid gases, where any flow loss on the pump suction side must be avoided in order to prevent cavitation in the first pump stage.
  • the suction port lying axially at the level of the shaft is intended to avoid sharp diversions of the inflowing medium inside the pump before the first stage. Starting from the suction port, the suction should Line are also led without major changes in direction to the container or tank to be pumped empty, in order to keep the flow losses in the feed line as low as possible.
  • the lack of sufficient self-priming and waste safety is now eliminated by arranging a liquid storage space of sufficient size between two pump stages, the connection to which is provided to the preceding centrifugal pump stage in the geodetically upper part of the storage space and wherein a seal for sealing between the liquid storage space and the preceding centrifugal pump stage the shaft gap is arranged.
  • the liquid storage space between the normal priming first stage and the first following self-priming centrifugal pump stage, whereby it is achieved that the largest possible proportion of liquid when the pump drops, i.e. when the liquid flows back from the pressure line through the pump into the suction-side container, it is retained in the pump itself, since a, albeit small, portion of liquid also remains in the self-priming gyro stages following the storage space.
  • this liquid is then conveyed within a short time to the last self-priming stage, which is known to take over the priming alone and is then available to this stage as operating fluid for the priming process.
  • the liquid storage space between two pump stages can now also be used according to the invention for the further purposes of liquid gas separation during the conveying process, in which case it is expediently arranged between the first and the second self-priming gyro stage and a connection for in the area of the geodetically highest point of this liquid storage space provides for an extraction line.
  • the arrangement of the liquid storage space at this point has the advantage that a large part of the liquid portion that may be outgassed on the suction side of the pump and in the suction line is already condensed again due to compression by the fully loaded stage and the first self-priming stage and only one at this point The rest of the gasified medium is contained in the flow.
  • This residual portion of gaseous medium can then be at the highest point in the Liquid supply space provided extraction line are returned to the suction-side tank or container, so that from the stages following the liquid storage space, only gas-free liquid is conveyed and leaves the pump pressure port.
  • a correspondingly optimally dimensioned cross-section of the line leading back from the liquid storage space to the container or tank also allows a possible proportion of liquid flowing back with the gas to be reduced to a minimum, so that the pump efficiency is only marginally or not at all influenced thereby.
  • this space In order to increase the separation effect in the liquid storage space, it is proposed to design this space as a liquid cooking separating and separating container by appropriate design and the installation of ribs.
  • These internals also have the additional advantage that they also fall off when the pump, i.e. when the liquid flows back after switching off from the pressure line through the pump back into the suction-side container, brake the backflow of the medium and thereby retain a particularly large part of the liquid in the pump part, which is connected downstream of the liquid storage space.
  • Self-priming centrifugal pump stages in the form of side channel stages have proven particularly suitable for use in such a pump, since they have optimal self-priming capability.
  • the axial extent of the liquid storage space should correspond approximately to the axial extent of a side channel step, since this retains sufficient liquid in the pump for the suction process.
  • the suction slot of the side channel pump stage following the liquid storage space is arranged in the geodetically lower area of the liquid storage space, so that the entire liquid supply of the storage space even when the pump is started up again, the self-priming stages as auxiliary or operating liquid for the Suction process is available.
  • the liquid storage space is expediently connected to a device for automatically checking the liquid level in the liquid storage space, which emits a signal or prevents the pump from being started up if the liquid storage space does not contain a sufficient amount of liquid. Furthermore, it can be expedient if a time relay is provided, which switches the pump off again after it has been switched on if the suction has not taken place within a certain predetermined period of time. These measures result in securing the pump against dry running.
  • the pump shaft is denoted by 1 and carries the fully loaded normal-suction rotary impeller 2 in the first pump stage, which is specially designed for optimal pumping speed, i.e. is designed for the lowest possible NPSH value of the pump, without placing particular value on the efficiency and delivery head of this first wheel.
  • the impellers of the following side channel stages are designated.
  • 4 is the pump suction housing with the suction port 5 and the inlet 6 arranged axially at shaft height.
  • the pump housing of the standard suction stage is designated 7
  • the housing parts of the following side channel pump stages are 8 and 9.
  • the pressure port 11 is located on the pump pressure housing 10 the pressure housing 10 still follows the mechanical seal or seal housing 12.
  • the liquid storage space 13 is provided, the transition to the first fully loaded centrifugal pump stage being arranged in the geodetically upper region of the liquid storage space, above the partition 14, which separates the liquid storage space from the first fully loaded centrifugal pump stage. Furthermore, between the housing part 15 forming the first storage space in the area of the shaft between this housing part and shaft 1, shaft seal 16 is provided, which prevents liquid in the area of the hub from passing from the liquid storage space or the pump stages that have been resettled into the first pump stage.
  • the liquid storage space 13 is arranged behind the first self-priming and in front of the second self-priming side-channel centrifugal pump stage, the connection from the fluid storage space to the preceding centrifugal pump stage again takes place in the geodetically upper area of the liquid storage space, above the partition 14, while between the shaft and the hub part of the housing 15 again a shaft seal 16 is arranged.
  • 13 ribs 17 are provided in the liquid storage space, which are intended to bring about a separation between gas and liquid in the storage space, a removal opening 18 being additionally arranged at the geodetically highest point of the storage space; for returning the gas components located in space 13 into the suction-side container or tank from which the pump draws in.
  • the self-priming pump stages are designed as side channel centrifugal pumps and the suction slot 19 of the side channel stage following the liquid storage space can be seen in the geodetically lowest point of the liquid storage space.
  • the pump shaft is supported in a slide bearing 20 and a ball bearing 21.
  • FIG. 3 shows the pump on the base plate 22 with the intake port 6, the housing part 7 of the first pump stage, the housing part 15 of the liquid storage space and the housing parts 8 and 9 of the following self-priming stage.
  • the pump is driven by an electric motor 23.
  • a device 26 for determining the liquid level in the liquid storage space is connected via connections 24, 25, the electrical energy of which is supplied by a battery 27.
  • Such devices for determining the liquid level are known and therefore do not need to be explained here tion.
  • the device is set so that it emits a signal when, when the pump is switched on, the liquid level in the liquid storage space is below a certain limit which must be reached if the liquid contained in the liquid storage space is to be sufficient for the suction process.
  • the pump motor 23 is either prevented from running automatically and / or the operator is made aware of the insufficient fluid level in the pump so that it can provide a refill.
  • the device 26 is set up in such a way that when a certain period of time has elapsed - for example 30 seconds - after the pump has started up, it is checked whether the pump has sucked in. If the suction has not taken place, the pump is switched off automatically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Toys (AREA)
EP81105972A 1980-08-05 1981-07-29 Pompe rotative à auto-amorçage, notamment pour le pompage de fluides près de leur point d'ébullition Expired EP0045483B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105972T ATE5433T1 (de) 1980-08-05 1981-07-29 Selbstansaugende kreiselpumpe, insbesondere zur foerderung von fluessigkeiten in der naehe ihres siedepunktes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3029604 1980-08-05
DE3029604 1980-08-05

Publications (3)

Publication Number Publication Date
EP0045483A2 true EP0045483A2 (fr) 1982-02-10
EP0045483A3 EP0045483A3 (en) 1982-02-17
EP0045483B1 EP0045483B1 (fr) 1983-11-23

Family

ID=6108913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105972A Expired EP0045483B1 (fr) 1980-08-05 1981-07-29 Pompe rotative à auto-amorçage, notamment pour le pompage de fluides près de leur point d'ébullition

Country Status (9)

Country Link
US (1) US4390317A (fr)
EP (1) EP0045483B1 (fr)
AT (1) ATE5433T1 (fr)
AU (1) AU542218B2 (fr)
CA (1) CA1165624A (fr)
DK (1) DK149932C (fr)
ES (1) ES504574A0 (fr)
HK (1) HK39685A (fr)
NZ (1) NZ197872A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425656A1 (de) * 1984-07-12 1986-01-23 SERO Pumpenfabrik GmbH, 6922 Meckesheim Kreiselpumpe
EP0222233A2 (fr) * 1985-11-06 1987-05-20 KSB Aktiengesellschaft Pompe centrifuge multiétagée pour le transport de gaz liquide
DE4113029A1 (de) * 1991-04-20 1992-10-22 Sihi Gmbh & Co Kg Selbstansaugende kreiselpumpe zur foerderung von fluessigkeiten in der naehe ihres siedepunktes
WO1997008461A1 (fr) * 1995-08-30 1997-03-06 Sterling Fluid Systems (Germany) Gmbh Pompe regenerative

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553835B1 (fr) * 1983-10-25 1986-02-28 Bertin & Cie Machine de compression d'un fluide, a plusieurs etages de compression en serie
DE3717058A1 (de) * 1987-05-21 1988-12-08 Bayer Ag Mischer zum vermischen mindestens zweier fliessfaehiger stoffe, insbesondere unter durchfuehrung bzw. einleitung einer reaktion waehrend der vermischung
DE4241406C2 (de) * 1992-12-09 2001-10-18 Bosch Gmbh Robert Gebläsegehäuse
JPH0886298A (ja) * 1994-09-19 1996-04-02 Hitachi Ltd ドライターボ真空ポンプ
IT1398142B1 (it) * 2010-02-17 2013-02-14 Nuovo Pignone Spa Sistema singolo con compressore e pompa integrati e metodo.
WO2014033317A1 (fr) * 2012-09-03 2014-03-06 Sterling Industry Consult Gmbh Pompe à canal latéral et procédé d'utilisation d'une pompe à canal latéral
US11560902B2 (en) 2019-01-25 2023-01-24 Pentair Flow Technologies, Llc Self-priming assembly for use in a multi-stage pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE711791C (de) * 1938-04-28 1941-10-07 Anna Dickow Geb Driemeyer Anordnung des Antriebes fuer eine nicht selbstansaugende Kreiselpumpe
DE888207C (de) * 1951-08-10 1953-08-31 Siemens Ag Selbstansaugende Pumpe
DE1528826B2 (fr) * 1951-01-28 1974-04-25 Siemen & Hinsch Mbh, 2210 Itzehoe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553066A (en) * 1944-06-30 1951-05-15 Southern John Self-priming centrifugal pump
US3385225A (en) * 1965-06-29 1968-05-28 Siemen & Hinsch Gmbh Rotary pump
DE2534740C3 (de) * 1975-08-04 1983-02-03 Franz 4630 Bochum Klaus Spaltrohrkreiselpumpe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE711791C (de) * 1938-04-28 1941-10-07 Anna Dickow Geb Driemeyer Anordnung des Antriebes fuer eine nicht selbstansaugende Kreiselpumpe
DE1528826B2 (fr) * 1951-01-28 1974-04-25 Siemen & Hinsch Mbh, 2210 Itzehoe
DE888207C (de) * 1951-08-10 1953-08-31 Siemens Ag Selbstansaugende Pumpe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425656A1 (de) * 1984-07-12 1986-01-23 SERO Pumpenfabrik GmbH, 6922 Meckesheim Kreiselpumpe
AT402333B (de) * 1984-07-12 1997-04-25 Sero Pumpenfabrik Gmbh Kreiselpumpe
EP0222233A2 (fr) * 1985-11-06 1987-05-20 KSB Aktiengesellschaft Pompe centrifuge multiétagée pour le transport de gaz liquide
EP0222233A3 (en) * 1985-11-06 1988-08-24 Klein, Schanzlin & Becker Aktiengesellschaft Multistage centrifugal pump for the transport of liquid gas
DE4113029A1 (de) * 1991-04-20 1992-10-22 Sihi Gmbh & Co Kg Selbstansaugende kreiselpumpe zur foerderung von fluessigkeiten in der naehe ihres siedepunktes
WO1992018775A1 (fr) * 1991-04-20 1992-10-29 Sihi Gmbh & Co Kg Pompe centrifuge auto-amorçante
WO1997008461A1 (fr) * 1995-08-30 1997-03-06 Sterling Fluid Systems (Germany) Gmbh Pompe regenerative
US6082960A (en) * 1995-08-30 2000-07-04 Sterling Fluid Systems Gmbh Regenerative pump

Also Published As

Publication number Publication date
DK149932C (da) 1987-10-12
AU7369181A (en) 1982-02-11
ES8206774A1 (es) 1982-08-16
EP0045483B1 (fr) 1983-11-23
EP0045483A3 (en) 1982-02-17
HK39685A (en) 1985-05-31
DK149932B (da) 1986-10-27
DK346881A (da) 1982-02-06
ES504574A0 (es) 1982-08-16
AU542218B2 (en) 1985-02-14
NZ197872A (en) 1985-03-20
US4390317A (en) 1983-06-28
CA1165624A (fr) 1984-04-17
ATE5433T1 (de) 1983-12-15

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