EP1592889A1 - Dispositif pour transporter des liquides - Google Patents

Dispositif pour transporter des liquides

Info

Publication number
EP1592889A1
EP1592889A1 EP04710401A EP04710401A EP1592889A1 EP 1592889 A1 EP1592889 A1 EP 1592889A1 EP 04710401 A EP04710401 A EP 04710401A EP 04710401 A EP04710401 A EP 04710401A EP 1592889 A1 EP1592889 A1 EP 1592889A1
Authority
EP
European Patent Office
Prior art keywords
pump
housing
drive shaft
liquid
negative 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.)
Withdrawn
Application number
EP04710401A
Other languages
German (de)
English (en)
Inventor
Luc Reynders
Bert Kempeneers
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel 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
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1592889A1 publication Critical patent/EP1592889A1/fr
Withdrawn legal-status Critical Current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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type
    • 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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use

Definitions

  • the invention relates to a device for conveying liquids according to the preamble of independent patent claim 1.
  • Such a device is known from JP 8144989.
  • This has a pump that is driven by an electric motor.
  • the pump is provided with a suction opening into which the liquid to be pumped flows.
  • the liquid is removed by the pump via a piping system.
  • the invention has for its object to avoid the disadvantages mentioned and to provide a device for conveying liquids, in particular cooling lubricants with production residues, which works reliably and reliably pumps liquids which are at a very low level.
  • This object is achieved in that, at least when the pump is started, there is a negative pressure in the housing surrounding the drive shaft, which continues through the bearing arrangement in the pump housing.
  • the advantage of this arrangement is that due to the negative pressure, the liquid flows into the pump housing at a low level and fills this space up to a certain level, which is sufficient to effect delivery.
  • the liquid discharge opening to a discharge pipe.
  • the discharge opening or the pipe is connected to a non-return valve, so that the negative pressure in the pump housing is maintained. can be held when the pump is in the start phase.
  • the check valve is, for example, a ball, which is arranged in the liquid tube in an enlarged cross-sectional area.
  • a connection is provided in the housing which surrounds the drive shaft and is connected to a vacuum source.
  • a vacuum source This can be a vacuum pump.
  • the suppression is generated by an ejector, using the excess pressure of cleaned cooling lubricant. This is fed to the ejector.
  • cooling lubricant is used to create negative pressure, this can be reintroduced directly into the liquid to be pumped. It is therefore not necessary to prepare an additional auxiliary.
  • the negative pressure is advantageously in a range from 0.05 bar to 0.3 bar. This depends only on the height to be overcome between the suction opening and the impeller of the pump.
  • the pump is preferably located in a container and is fastened there via a flange connection.
  • the electric motor is also connected to the housing surrounding the drive shaft via a connecting flange.
  • FIG. 1 shows a known device for conveying liquids, in particular cooling lubricants and
  • Figure 2 shows a device for conveying liquids at low liquid height.
  • a container 10 is provided, in which liquid is located up to level 11.
  • a pump 12 consisting of a pump impeller 13 and a pump housing 14, is provided within the container 10.
  • the pump 12 draws in the liquid via the suction opening 15 and conveys it to a liquid discharge opening 16, which is usually connected to a pipe or a hose, which was not shown here.
  • the pump 12 is provided with a fastening flange 17 which can be arranged on a fastening structure of the container, not shown here.
  • a housing 18, in which the drive shaft 19 is located, extends above the pump 12. This drive shaft 19 is connected to an electric motor 20.
  • the electric motor 20 is fastened to the housing 18 via a flange connection 21.
  • FIG. 1 also shows a schematic representation of a device for conveying liquids. The same parts are provided with the same reference numerals.
  • the impeller 13 is arranged in the region of the fastening flange or the end of the pump housing, a slight bearing gap 22 being present between the housing 18 and the drive shaft 19.
  • the housing 18 is equipped with a connecting flange 23 for generating a negative pressure in the housing.
  • An ejector 24 with a liquid inlet 25 and an ejector nozzle 26 is located on the connecting flange 23.
  • the ejector nozzle 26 is arranged directly in front of a cross-sectional constriction 27 of the outlet pipe 28.
  • the outlet pipe 28 is provided with a connection 29, on which a drain pipe or drain hose can be arranged.
  • the liquid for the ejector flows in with overpressure and forms an ejector jet, which generates a vacuum in the housing 18.
  • a riser pipe 31 has a check valve in the form of a ball 32 at the liquid discharge opening 16. This ball 32 is located in a region 33 with an enlarged cross section. As soon as the liquid in the riser pipe 31 rises, the ball 32 is pushed upwards or into the dead space 34 and the liquid can flow out unhindered.
  • the cooling lubricant naturally contains production residues, such as chips from industrial processes. These can be easily conveyed using the pump 12 shown.
  • the negative pressure generated by the ejector can be set, for example by the pressure of the liquid supplied.
  • the pump 12 is able to deliver a liquid quantity of 50 liters to 6,000 liters per minute depending on the design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

La présente invention concerne un dispositif conçu pour transporter des liquides, notamment des liquides de refroidissement comprenant des résidus de production. Ce dispositif comprend une pompe verticale qui présente un carter de pompe (14) et un rotor de pompe (13), un arbre d'entraînement (19), un moteur électrique et un raccord d'arbre situé entre le moteur électrique et le rotor de pompe (13). L'arbre d'entraînement (19) est entouré par un boîtier (18). Le carter de pompe (14) présente une ouverture d'aspiration (15) et une ouverture de sortie de liquide (16). Lors du démarrage de la pompe, une dépression est produite dans le boîtier (18) entourant l'arbre d'entraînement (19), progresse dans le carter de pompe (14) à travers la fente (22) située entre l'arbre (19) et le boîtier (18) et assure l'admission de liquide, même avec un très faible niveau de liquide.
EP04710401A 2003-02-12 2004-02-12 Dispositif pour transporter des liquides Withdrawn EP1592889A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10305962 2003-02-12
DE10305962 2003-02-12
PCT/EP2004/050121 WO2004072484A1 (fr) 2003-02-12 2004-02-12 Dispositif pour transporter des liquides

Publications (1)

Publication Number Publication Date
EP1592889A1 true EP1592889A1 (fr) 2005-11-09

Family

ID=32863807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04710401A Withdrawn EP1592889A1 (fr) 2003-02-12 2004-02-12 Dispositif pour transporter des liquides

Country Status (4)

Country Link
US (1) US7165953B2 (fr)
EP (1) EP1592889A1 (fr)
BR (1) BRPI0407395A (fr)
WO (1) WO2004072484A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8328540B2 (en) * 2010-03-04 2012-12-11 Li-Chuan Wang Structural improvement of submersible cooling pump
US9435344B1 (en) 2012-09-12 2016-09-06 Sidney T. Highnote Liquid sealed pump
DE102020125805A1 (de) * 2020-10-02 2022-04-07 Frideco Ag Pumpensystem und Verfahren zum Betrieb eines Pumpensystems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391769A (en) * 1943-05-14 1945-12-25 Allis Chalmers Mfg Co Self-priming pump
GB1307170A (en) * 1971-09-20 1973-02-14 Godwin Ltd H J Priming of pumps
JPS6432095A (en) * 1987-07-28 1989-02-02 Tsurumi Mfg Self-priming type submergible pump
DE4432224A1 (de) * 1994-09-10 1996-03-14 Elektra Beckum Ag Vorrichtung zum Verbessern des Ansaugverhaltens von Strömungsförderpumpen
JP3390097B2 (ja) * 1994-11-25 2003-03-24 株式会社東洋電機工業所 補助空気・水吸引機能を有する水中ポンプ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004072484A1 *

Also Published As

Publication number Publication date
BRPI0407395A (pt) 2006-02-07
US20060039810A1 (en) 2006-02-23
WO2004072484A1 (fr) 2004-08-26
US7165953B2 (en) 2007-01-23

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