EP1522734B1 - Method to operate a lifting equipment to pump contaminated liquids, in particular cooling lubricant - Google Patents

Method to operate a lifting equipment to pump contaminated liquids, in particular cooling lubricant Download PDF

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Publication number
EP1522734B1
EP1522734B1 EP04022303A EP04022303A EP1522734B1 EP 1522734 B1 EP1522734 B1 EP 1522734B1 EP 04022303 A EP04022303 A EP 04022303A EP 04022303 A EP04022303 A EP 04022303A EP 1522734 B1 EP1522734 B1 EP 1522734B1
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EP
European Patent Office
Prior art keywords
free
bypass
centrifugal pump
flow centrifugal
impeller
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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.)
Expired - Lifetime
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EP04022303A
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German (de)
French (fr)
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EP1522734A1 (en
Inventor
Alfons Bär
Hubert Schnur
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Bar-Co-Anlagentechnik GmbH
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Bar-Co-Anlagentechnik GmbH
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Priority to PL04022303T priority Critical patent/PL1522734T3/en
Publication of EP1522734A1 publication Critical patent/EP1522734A1/en
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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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • 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
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
    • 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
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/604—Vortex non-clogging type pumps

Definitions

  • the present invention relates to a method of operating a lifting device for pumping out contaminated liquid media, such as cooling lubricants using at least one free-flow centrifugal pump, and a lifting device and a free-flow centrifugal pump for carrying out the method.
  • lifting devices and free-flow centrifugal pumps are known in many forms and designs in the market and in use.
  • such lifting devices are used with free-flow centrifugal pumps and subsequent flushing troughs, in particular to collect contaminated liquid media, arising from machine tools, to collect in the lifting device and by means of the freewheeling centrifugal pump and pumping a.
  • cleaning device, filter device, reprocessing device od.
  • Supply a
  • a homogeneous pumping out of contaminated media, especially cooling lubricant is not possible. Therefore, there is often a backflow in the cooling lubricant channel, whereby the rinsing effect is prevented for the chip transport and uneven amount of quantity of cooling lubricant to the cutting machining center or the cutting processing machines is provided. Therefore, there is no homogeneous processing of the contaminated medium, especially liquid coolant and also no low supply of purified coolant possible, which is undesirable.
  • the US 5,114,312 discloses a centrifugal pump having a main axial suction port, wherein in the radial region this has an inlet and an outlet. Inlet and outlet communicate with each other, whereby the pump flow can be diverted via the ports at the radial inlet and outlet into partial streams via separate services.
  • the WO 88/05132 A discloses a pump structure in which liquid is added to the storage in the drive-side region near the drive and the storage of the actual pump impeller, to prevent drive-side secondary air or false air from entering the pump chamber.
  • the present invention is therefore based on the object to provide a method and a lifting device and a free-flow centrifugal pump for carrying out the method with which the aforementioned disadvantages can be eliminated in a simple and cost-effective manner, and in which a homogeneous suction of liquid contaminated media, how cooling lubricant is made possible.
  • an overall height, in particular installation height of the lifting device should be possible with a simultaneously reduced minimum level in the lifting container.
  • the suction or a Intake area of the free-flow centrifugal pump used in a lifting device additionally preferably to supply via a bypass with liquid medium, in particular cooling lubricant.
  • the bypass is preferably spaced and arranged centrally in front of the suction opening of the pump housing of the free-flow centrifugal pump and preferably leads permanently liquid medium to the pump housing or the impeller of the free-flow centrifugal pump.
  • a height of the lifting device can be reduced, so that overall much lower lifting devices can be produced with subsequent flushing channels.
  • the following devices such as, for example, treatment devices, filter devices which clean contaminated liquid media, in particular contaminated liquid cooling lubricant, can be operated more homogeneously.
  • a storage container for providing purified liquid coolant can be made much smaller, since a more homogeneous transporting and providing of cooling lubricant in this way is possible.
  • bypass outside and is assigned separately to the free-stream centrifugal pump. This can be provided, for example, in a tub bottom of the lifting device.
  • the bypass may be inserted into a suction line, wherein it is common in all embodiments that an outlet opening of the bypass is preferably centered on the intake or centric on the impeller of the free-flow centrifugal pump.
  • an inventive lifting means R 1 has a free-flow centrifugal pump F 1 which projects into a lifting vessel 1 of the lifting device R. 1
  • the free-flow centrifugal pump F 1 has a drive unit 2, in particular an electric motor, which drives an impeller 4 indicated by dashed lines via a drive shaft 3, which is only indicated here.
  • the impeller 4 is seated in a pump housing 5, to which preferably centrally to the impeller 4 in a lower housing part 6, a suction port 7 connects.
  • liquid medium in particular cooling lubricant
  • a further use such as, for example, a treatment or purification device, filter device, etc., in order to contaminate it Liquid media, or contaminated cooling lubricant can be cleaned and then returned to a same or further use.
  • the free-flow centrifugal pump F 1 is inserted vertically in a lifting container 1, to which a flushing trough 9 connects.
  • contaminated liquid medium in particular cooling lubricant, consisting of emulsions, oils, contaminated media such as chips, abrasion od.
  • cooling lubricant consisting of emulsions, oils, contaminated media such as chips, abrasion od.
  • machine tools such as turning centers, milling centers, etc. in the lifting container 1.
  • the lifting container 1 collects in the region of a trough 10, the mixture of cooling lubricant and impurities and is further pumped there for further processing, in particular for cleaning by means of the free-stream centrifugal pump F 1 through the outlet 8 and further transported.
  • the outlet opening 12 is preferably aligned centrally to the suction port 7 or centrally and in a common axis to the impeller 4 of the free-flow centrifugal pump F 1 .
  • the outlet opening 12 of the bypass 11 is also spaced apart in the impeller 4 and the suction port 7 of the free-flow centrifugal pump F 1 .
  • bypass 11 cooling lubricant from the entire system of the free-flow centrifugal pump F 1 permanently supplied, wherein the supply under a pressure of about 0.2 bar to 3 bar, preferably 0.5 bar. Further, a delivery volume of about 5% to 15%, preferably 10% of the total delivery of the free-flow centrifugal pump F 1, the bypass 11 is supplied to displace sucked secondary air and to reduce a minimum level.
  • a lifting device R 2 is shown, in which a free-flow centrifugal pump F 2 on a substrate 13 is arranged in a horizontal version.
  • a suction line 14 connects, which is in communication with the flushing trough 9.
  • a bypass 11 adjoins the suction line 14 which supplies a partial flow of liquid medium, in particular cooling lubricant, to the suction opening 7 or the impeller 4 of the free-flow centrifugal pump F 2 in the manner described above.
  • the outlet opening 12 and the bypass 11 is aligned centrally on the impeller 4 and lying in one axis, so that in this manner described above, liquid medium or cooling lubricant of the free-flow centrifugal pump F 2 can be permanently supplied to vent or an aspiration to reduce secondary air, wherein an efficiency of the free-flow centrifugal pump F 1 , in particular the lifting device R 2 is substantially improved.
  • a free-flow centrifugal pump F 3 of conventional type is shown in which at least one or a plurality of bypasses 11 can be connected or connected at different locations in a pump housing 5, in particular in a lower housing part 6 in the manner described above to reduce secondary air during the aspiration of liquid medium or to vent the free-flow centrifugal pump F 3 .
  • bypass 11 preferably centrally in front of the suction port 7 of the free-flow centrifugal pump F 3 can be assigned or opens directly into the lower housing part 6 of the pump housing 5, so that the outlet port 12 of the bypass 11 to the impeller. 4 the free-stream centrifugal pump F 3 is aligned.
  • the bypass 11 in the pump housing 5 or housing part 6 axially, or radially or intervening axially to radially aligned with the impeller 4.
  • the bypass 11 is arranged centrally and spaced from the intake opening 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Lubricants (AREA)

Abstract

Process for operating a lifting device (R1) for pumping out contaminated liquid media, especially coolant, using a non-chokable circulating pump (F1) comprises permanently impinging a suction opening (7) or suction region of the pump with a liquid medium. Independent claims are also included for the following: (1) Lifting device used in the above process; and (2) Non-chokable circulating pump used in the above process. Preferred Features: The liquid medium, especially coolant, flows via a bypass (11) to the suction opening or suction region, especially the region of the flywheel (4) of the pump. The bypass opens into the housing part of the pump close to the flywheel.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben einer Hebeeinrichtung zum Abpumpen von verunreinigten flüssigen Medien, wie Kühlschmiermittel unter Verwendung zumindest einer Freistromkreiselpumpe sowie eine Hebeeinrichtung und eine Freistromkreiselpumpe zum Durchführen des Verfahrens.The present invention relates to a method of operating a lifting device for pumping out contaminated liquid media, such as cooling lubricants using at least one free-flow centrifugal pump, and a lifting device and a free-flow centrifugal pump for carrying out the method.

Derartige Verfahren, Hebeeinrichtungen sowie Freistromkreiselpumpen sind in vielfältiger Form und Ausführung im Markt bekannt und gebräuchlich. Im Markt werden bspw. derartige Hebeeinrichtungen mit eingesetzten Freistromkreiselpumpen und anschliessenden Spülrinnen eingesetzt, um insbesondere verunreinigte flüssige Medien, entstehend aus verspanenden Bearbeitungsmaschinen aufzufangen, in der Hebeeinrichtung zu sammeln und mittels der Freistromkreiselpumpe abzupumpen und einer bspw. Reinigungseinrichtung, Filtereinrichtung, Wiederaufbearbeitungseinrichtung od. dgl. zuzuführen.Such methods, lifting devices and free-flow centrifugal pumps are known in many forms and designs in the market and in use. In the market, for example, such lifting devices are used with free-flow centrifugal pumps and subsequent flushing troughs, in particular to collect contaminated liquid media, arising from machine tools, to collect in the lifting device and by means of the freewheeling centrifugal pump and pumping a. For example, cleaning device, filter device, reprocessing device od. Like. Supply.

Nachteilig hierbei ist, dass derartige Hebeeinrichtungen apparativ aufwendig und gross hergestellt werden müssen, so dass noch eine Mindestfüllstandshöhe bei eingesetzten Freistromkreiselpumpen erreicht werden kann, um die verunreinigten Medien abzupumpen.The disadvantage here is that such lifting devices must be made expensive in terms of apparatus and size, so that even a minimum fill level can be achieved with free-flow centrifugal pumps used to pump out the contaminated media.

Durch sich ändernden Anforderungen an moderne Untergrundbeschaffenheitsstrukturen in Fertigungshallen, hinsichtlich Dichtheit, Durchlässigkeit etc., können in herkömmliche Fertigungszentren keine wannenartige Ausformungen mehr eingebracht werden, um entsprechende Hebeeinrichtungen aufzustellen. Heutzutage werden Fertigungsmaschinen niedriger und bedienerfreundlicher hergestellt, so dass auch betreffend die daran anschliessenden Spülrinnen mit anschliessenden Hebebehältern bzw. Hebeeinrichtungen andere Anforderungen gestellt werden.Due to changing requirements of modern underground texture structures in production halls, with regard to impermeability, permeability, etc., no trough-like formations can be introduced into conventional machining centers in order to set up corresponding lifting devices. Today, production machines are made lower and more user-friendly, so that other requirements are also made regarding the subsequent flushing troughs with subsequent lifting containers or lifting devices.

Daher ist es erforderlich, die Mindestbefüllzustände von Hebeeinrichtungen zu reduzieren, um noch herkömmliche Freistromkreiselpumpen einsetzen zu können.Therefore, it is necessary to reduce the minimum filling conditions of lifting devices in order to still be able to use conventional centrifugal pumps.

Ein homogenes Abpumpen von verunreinigten Medien, insbesondere Kühlschmiermittel ist bisher nicht möglich. Es stellt sich daher häufig ein Rückstau in der Kühlschmiermittelrinne ein, wodurch die Spülwirkung für den Spänetransport unterbunden wird und ungleichmässig viel Quantität an Kühlschmiermittel dem zerspanenden Bearbeitungszentrum oder den zerspanenden Bearbeitungsmaschinen zur Verfügung gestellt wird. Daher ist keine homogene Bearbeitung des verunreinigten Mediums, insbesondere flüssigem Kühlschmiermittels sowie auch keine geringe Bevorratung von gereinigtem Kühlschmiermittel möglich, was unerwünscht ist.A homogeneous pumping out of contaminated media, especially cooling lubricant is not possible. Therefore, there is often a backflow in the cooling lubricant channel, whereby the rinsing effect is prevented for the chip transport and uneven amount of quantity of cooling lubricant to the cutting machining center or the cutting processing machines is provided. Therefore, there is no homogeneous processing of the contaminated medium, especially liquid coolant and also no low supply of purified coolant possible, which is undesirable.

Die US 5,114,312 offenbart eine Kreiselpumpe, die eine axialen Hauptansaugstutzen aufweist, wobei im radialen Bereich diese einen Einlass sowie einen Auslass aufweist. Einlass und Auslass stehen miteinander in Verbindung, wobei der Pumpenstrom über die Anschlüsse am radialen Einlass und Auslass in Teilströme über separate Leistungen umgeleitet werden können. Die WO 88/05132 A offenbart einen Pumpenaufbau, bei welchem im antriebsseitigem Bereich nahe des Antriebes und der Lagerung des eigentlichen Pumpenrades der Lagerung Flüssigkeit zugegeben wird, um zu verhindern, dass antriebsseitige Nebenluft bzw. Falschluft in den Pumpenraum gelangt.The US 5,114,312 discloses a centrifugal pump having a main axial suction port, wherein in the radial region this has an inlet and an outlet. Inlet and outlet communicate with each other, whereby the pump flow can be diverted via the ports at the radial inlet and outlet into partial streams via separate services. The WO 88/05132 A discloses a pump structure in which liquid is added to the storage in the drive-side region near the drive and the storage of the actual pump impeller, to prevent drive-side secondary air or false air from entering the pump chamber.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren, sowie eine Hebeeinrichtung und eine Freistromkreiselpumpe zum Durchführen des Verfahrens zu schaffen, mit welchen auf einfache und kostengünstige Weise die vorgenannten Nachteile beseitigt werden können, und in welchen ein homogenes Absaugen von flüssigen verunreinigten Medien, wie Kühlschmiermittel ermöglicht wird. Zudem soll eine Gesamthöhe, insbesondere Einbauhöhe der Hebeeinrichtung bei einem gleichzeitig reduzierten Mindestfüllstand im Hebebehälter möglich sein.The present invention is therefore based on the object to provide a method and a lifting device and a free-flow centrifugal pump for carrying out the method with which the aforementioned disadvantages can be eliminated in a simple and cost-effective manner, and in which a homogeneous suction of liquid contaminated media, how cooling lubricant is made possible. In addition, an overall height, in particular installation height of the lifting device should be possible with a simultaneously reduced minimum level in the lifting container.

Zur Lösung dieser Aufgabe führen die Merkmale der Kennzeichen der Patentansprüche 1, 2, 11 und 19.To achieve this object, the features of the characteristics of the claims 1, 2, 11 and 19 lead.

Bei der vorliegenden Erfindung hat sich als besonders vorteilhaft erwiesen, die Ansaugöffnung oder einen Ansaugbereich der in eine Hebeeinrichtung eingesetzten Freistromkreiselpumpe zusätzlich vorzugsweise über einen Bypass mit flüssigem Medium, insbesondere Kühlschmiermittel zu versorgen. Dabei ist der Bypass vorzugsweise beabstandet und zentrisch vor der Ansaugöffnung des Pumpengehäuses der Freistromkreiselpumpe angeordnet und führt vorzugsweise permanent flüssiges Medium dem Pumpengehäuse bzw. dem Flügelrad der Freistromkreiselpumpe zu. Hierdurch wird ein permanentes Entlüften bzw. Befüllen des Pumpengehäuses der Freistromkreiselpumpe gewährleistet, wobei ca. 5% bis 15% des gesamten zu fördernden flüssigen Mediums, vorzugsweise 5% bis 10% des flüssigen Mediums bzw. Kühlschmiermittels, welches auch als verunreinigte Fraktion verwendet werden kann, dem Flügelrad bzw. der Ansaugöffnung der Freistromkreiselpumpe zugeführt wird. Hierdurch lässt sich ein Mindestfüllstand der Freistromkreiselpumpe im Betrieb wesentlich reduzieren, und ein homogenes Fördern bzw. Abpumpen von flüssigem Medium stellt sich ein.In the present invention has proved to be particularly advantageous, the suction or a Intake area of the free-flow centrifugal pump used in a lifting device additionally preferably to supply via a bypass with liquid medium, in particular cooling lubricant. In this case, the bypass is preferably spaced and arranged centrally in front of the suction opening of the pump housing of the free-flow centrifugal pump and preferably leads permanently liquid medium to the pump housing or the impeller of the free-flow centrifugal pump. This ensures a permanent venting or filling of the pump housing of the free-flow centrifugal pump, wherein about 5% to 15% of the total liquid medium to be pumped, preferably 5% to 10% of the liquid medium or cooling lubricant, which can also be used as a contaminated fraction , the impeller or the suction port of the free-stream centrifugal pump is supplied. This is possible a minimum level of the free-flow centrifugal pump during operation significantly reduce, and a homogeneous pumping or pumping out of liquid medium adjusts itself.

Es stellen sich keine Druckschwankungen oder unterschiedliche Niveaus im Hebebehälter mehr ein, da die Freistromkreiselpumpe eine permanente homogene Förderleistung erbringt und sich die Schwankungen, durch bisherige angesaugte Nebenluft, nicht mehr einstellen.There are no pressure fluctuations or different levels in the lifting container more, since the free-flow centrifugal pump provides a permanent homogeneous flow and the fluctuations, by previous sucked secondary air, no longer adjust.

Auf diese Weise lässt sich auch eine Bauhöhe der Hebeeinrichtung reduzieren, so dass insgesamt wesentlich niedrigere Hebeeinrichtungen mit anschliessenden Spülrinnen hergestellt werden können. Auch lassen sich hierdurch die nachfolgenden Einrichtungen, wie bspw. Aufbereitungseinrichtungen, Filtereinrichtungen, die verunreinigte flüssige Medien, insbesondere verunreinigtes flüssiges Kühlschmiermittel reinigen, homogener betreiben. Zusätzlich lässt sich auch ein Vorratsbehältnis zum Bereitstellen von gereinigten flüssigem Kühlschmiermittel wesentlich kleiner ausbilden, da ein homogeneres Transportieren und zur Verfügung stellen von Kühlschmiermittel auf diese Weise möglich ist.In this way, a height of the lifting device can be reduced, so that overall much lower lifting devices can be produced with subsequent flushing channels. In addition, the following devices, such as, for example, treatment devices, filter devices which clean contaminated liquid media, in particular contaminated liquid cooling lubricant, can be operated more homogeneously. In addition, a storage container for providing purified liquid coolant can be made much smaller, since a more homogeneous transporting and providing of cooling lubricant in this way is possible.

Im Rahmen der vorliegenden Erfindung soll ferner liegen, dass der Bypass ausserhalb und separat der Freistromstromkreiselpumpe zugeordnet ist. Dieser kann bspw. in einem Wannenboden der Hebeeinrichtung vorgesehen sein. Bei einer liegenden Ausführung der Freistromkreiselpumpe kann der Bypass in eine Saugleitung eingesetzt sein, wobei in allen Ausführungsbeispielen gemeinsam ist, dass eine Auslassöffnung des Bypasses vorzugsweise zentrisch auf die Ansaugöffnung bzw. zentrisch auf das Flügelrad der Freistromkreiselpumpe ausgerichtet ist.In the context of the present invention should also be that the bypass outside and is assigned separately to the free-stream centrifugal pump. This can be provided, for example, in a tub bottom of the lifting device. In a horizontal embodiment of the free-flow centrifugal pump, the bypass may be inserted into a suction line, wherein it is common in all embodiments that an outlet opening of the bypass is preferably centered on the intake or centric on the impeller of the free-flow centrifugal pump.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in

  • Figur 1 eine schematisch dargestellte Seitenansicht einer Hebeeinrichtung zum Abpumpen von verunreinigten flüssigen Medien, insbesondere Kühlschmiermittel mit einer Freistromkreiselpumpe;
  • Figur 2 eine schematisch dargestellte Seitenansicht auf ein weiteres Ausführungsbeispiel einer weiteren Hebeeinrichtung gemäss Figur 1;
  • Figur 3 eine schematisch dargestellte teilweise aufgeschnittene Freistromkreiselpumpe zum Betreiben einer Hebeeinrichtung.
Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing; this shows in
  • Figure 1 is a schematically illustrated side view of a lifting device for pumping out contaminated liquid media, in particular cooling lubricant with a free-flow centrifugal pump;
  • FIG. 2 is a diagrammatic side view of a further embodiment of a further lifting device according to FIG. 1;
  • 3 shows a schematically illustrated partially cut free-flow centrifugal pump for operating a lifting device.

Gemäss Figur 1 weist eine erfindungsgemässe Hebeeinrichtung R1 eine Freistromkreiselpumpe F1 auf, die in einen Hebebehälter 1 der Hebeeinrichtung R1 einragt.According to Figure 1, an inventive lifting means R 1 has a free-flow centrifugal pump F 1 which projects into a lifting vessel 1 of the lifting device R. 1

Die Freistromkreiselpumpe F1 besitzt eine Antriebseinheit 2, insbesondere Elektromotor, der über eine hier nur angedeutet Antriebswelle 3 ein gestrichelt angedeutetes Flügelrad 4 antreibt. Das Flügelrad 4 sitzt in einem Pumpengehäuse 5, an welches vorzugsweise zentrisch zum Flügelrad 4 in einem unteren Gehäuseteil 6 eine Ansaugöffnung 7 anschliesst.The free-flow centrifugal pump F 1 has a drive unit 2, in particular an electric motor, which drives an impeller 4 indicated by dashed lines via a drive shaft 3, which is only indicated here. The impeller 4 is seated in a pump housing 5, to which preferably centrally to the impeller 4 in a lower housing part 6, a suction port 7 connects.

Vom Pumpengehäuse 5 wird über die Ansaugöffnung 7 flüssiges Medium, insbesondere Kühlschmiermittel angesaugt und über einen Auslass 8 einer weiteren Verwendung wie bspw. Aufbereitungs- oder Reinigungseinrichtung, Filtereinrichtung etc. zugeführt, damit verunreinigte flüssige Medien, bzw. verunreinigtes Kühlschmiermittel gereinigt werden können und danach wieder einer gleichen oder weiteren Verwendung zugeführt werden kann.From the pump housing 5, liquid medium, in particular cooling lubricant, is sucked in via the suction opening 7 and fed through an outlet 8 to a further use, such as, for example, a treatment or purification device, filter device, etc., in order to contaminate it Liquid media, or contaminated cooling lubricant can be cleaned and then returned to a same or further use.

Zu dem vorliegenden Ausführungsbeispiel ist die Freistromkreiselpumpe F1 in einem Hebebehälter 1 lotrecht eingesetzt, an welchen ein Spülrinne 9 anschliesst.For the present embodiment, the free-flow centrifugal pump F 1 is inserted vertically in a lifting container 1, to which a flushing trough 9 connects.

Von einem hier nicht näher dargestellten Auffangbecken oder Spülrinne 9 selbst, gelangt verunreinigtes flüssiges Medium, insbesondere Kühlschmiermittel, bestehend aus Emulsionen, Ölen, verschmutzten Medien wie Späne, Abrieb od. dgl., bspw. von verspanenden Bearbeitungsmaschinen, wie Drehzentren, Fräszentren etc. in den Hebebehälter 1.Of a catch basin or flushing trough 9 not shown here, contaminated liquid medium, in particular cooling lubricant, consisting of emulsions, oils, contaminated media such as chips, abrasion od. Like., For example. From machine tools such as turning centers, milling centers, etc. in the lifting container 1.

Im Hebebehälter 1 sammelt sich im Bereich eines Wannenbodens 10 das Gemisch aus Kühlschmiermittel und Verunreinigungen und wird dort zur weiteren Bearbeitung, insbesondere zur Reinigung mittels der Freistromkreiselpumpe F1 über den Auslass 8 weiter gepumpt bzw. weiter transportiert.In the lifting container 1 collects in the region of a trough 10, the mixture of cooling lubricant and impurities and is further pumped there for further processing, in particular for cleaning by means of the free-stream centrifugal pump F 1 through the outlet 8 and further transported.

Bei derartigen Freistromkreiselpumpe F1 ist von Nachteil, dass diese erst einen sehr grossen Füllstand erreichen müssen, bis diese die vollständige Leistung, nach dem Entlüften und Ansaugen von Nebenluft erzielen.In such free-flow centrifugal pump F 1 has the disadvantage that they must first reach a very high level until they achieve the full performance after venting and suction of secondary air.

Bei der vorliegenden Erfindung hat sich als besonderes vorteilhaft erwiesen, an den Wannenboden 10 einen Bypass 11 anzuschliessen, dessen Auslassöffnung 12 vorzugsweise zentrisch zur Ansaugöffnung 7 bzw. zentrisch und in einer gemeinsamen Achse liegend zum Flügelrad 4 der Freistromkreiselpumpe F1 ausgerichtet ist.In the present invention has proven to be particularly advantageous to connect to the tub bottom 10, a bypass 11, the outlet opening 12 is preferably aligned centrally to the suction port 7 or centrally and in a common axis to the impeller 4 of the free-flow centrifugal pump F 1 .

Die Auslassöffnung 12 des Bypasses 11 ist zudem gegenüber im Flügelrad 4 bzw. der Ansaugöffnung 7 der Freistromkreiselpumpe F1 beabstandet.The outlet opening 12 of the bypass 11 is also spaced apart in the impeller 4 and the suction port 7 of the free-flow centrifugal pump F 1 .

Es hat sich bei der vorliegenden Erfindung als besonders vorteilhaft erwiesen, permanent flüssiges Medium, insbesondere Kühlschmiermittel über den Bypass 11 der Freistromkreiselpumpe F1 zuzuführen, so dass sich ein Ansaugen von Nebenluft wesentlich reduzieren lässt, so dass die Freistromkreiselpumpe F1 erheblich schneller auf ihre Maximalleistung kommt und sich ein Mindestfüllstand hierdurch deutlich reduzieren lässt.It has proved particularly advantageous in the present invention to supply permanently liquid medium, in particular cooling lubricant, via the bypass 11 to the free-flow centrifugal pump F 1 , so that suction of secondary air can be substantially reduced so that the free-flow centrifugal pump F 1 is considerably faster at its maximum output comes and a minimum level can be significantly reduced thereby.

Dabei wird bei der vorliegenden Erfindung über den Bypass 11 Kühlschmiermittel aus dem gesamten System der Freistromkreiselpumpe F1 permanent zugeführt, wobei die Zufuhr unter einem Druck von etwa 0,2 bar bis 3 bar, vorzugsweise 0,5 bar erfolgt. Ferner wird ein Fördervolumen von etwa 5% bis 15%, vorzugsweise 10% der Gesamtfördermenge der Freistromkreiselpumpe F1 dem Bypass 11 zugeführt, um angesaugte Nebenluft zu verdrängen und einen Mindestfüllstand zu reduzieren.In this case, in the present invention via the bypass 11 cooling lubricant from the entire system of the free-flow centrifugal pump F 1 permanently supplied, wherein the supply under a pressure of about 0.2 bar to 3 bar, preferably 0.5 bar. Further, a delivery volume of about 5% to 15%, preferably 10% of the total delivery of the free-flow centrifugal pump F 1, the bypass 11 is supplied to displace sucked secondary air and to reduce a minimum level.

Auf diese Weise lässt sich ein homogenes Ansaugen von flüssigen Medien, insbesondere Kühlschmiermittel mit Verunreinigungen gewährleisten, ohne dass sich Kühlschmiermittel bzw. das flüssige Medium in der Spülrinne 9 anstaut, bis die Freistromkreiselpumpe F1 entlüftet ist und die Nebenluft aus dieser abgeführt ist. Dies führt zu einem wesentlich homogeneren Bereitstellen von Kühlschmiermitteln.In this way, a homogeneous suction of liquid media, in particular cooling lubricants with impurities can be ensured without coolant or the liquid medium accumulates in the flushing trough 9 until the free-flow centrifugal pump F 1 is vented and the secondary air is discharged from this. This leads to a much more homogeneous provision of cooling lubricants.

In dem Ausführungsbeispiel der vorliegenden Erfindung gemäss Figur 2 ist eine Hebeeinrichtung R2 aufgezeigt, bei welcher eine Freistromkreiselpumpe F2 auf einem Untergrund 13 in einer liegenden Ausführung angeordnet ist. An deren Ansaugöffnung 7 schliesst eine Saugleitung 14 an, die mit der Spülrinne 9 in Verbindung steht.In the embodiment of the present invention according to Figure 2, a lifting device R 2 is shown, in which a free-flow centrifugal pump F 2 on a substrate 13 is arranged in a horizontal version. At the suction port 7, a suction line 14 connects, which is in communication with the flushing trough 9.

Wie in dem Ausführungsbeispiel gemäss Figur 2 angedeutet, schliesst an die Saugleitung 14 ein Bypass 11 an, der in oben beschriebener Weise einen Teilstrom an flüssigem Medium, insbesondere Kühlschmiermittel der Ansaugöffnung 7 bzw. des Flügelrades 4 der Freistromkreiselpumpe F2 zuführt. Vorzugesweise ist die Auslassöffnung 12 bzw. der Bypass 11 auf das Flügelrad 4 zentrisch und in einer Achse liegend ausgerichtet, so dass hierüber in oben beschriebener Weise flüssiges Medium bzw. Kühlschmiermittel der Freistromkreiselpumpe F2 permanent zugeführt werden kann, um zu entlüften bzw. ein Ansaugen von Nebenluft zu vermindern, wobei ein Wirkungsgrad der Freistromkreiselpumpe F1, insbesondere der Hebeeinrichtung R2 wesentlich verbessert wird.As indicated in the exemplary embodiment according to FIG. 2, a bypass 11 adjoins the suction line 14 which supplies a partial flow of liquid medium, in particular cooling lubricant, to the suction opening 7 or the impeller 4 of the free-flow centrifugal pump F 2 in the manner described above. Preferably, the outlet opening 12 and the bypass 11 is aligned centrally on the impeller 4 and lying in one axis, so that in this manner described above, liquid medium or cooling lubricant of the free-flow centrifugal pump F 2 can be permanently supplied to vent or an aspiration to reduce secondary air, wherein an efficiency of the free-flow centrifugal pump F 1 , in particular the lifting device R 2 is substantially improved.

In dem Ausführungsbeispiel der vorliegenden Erfindung gemäss Figur 3 ist eine Freistromkreiselpumpe F3 herkömmlicher Art aufgezeigt, bei welcher in einem Pumpengehäuse 5, insbesondere in einem unteren Gehäuseteil 6 zumindest eine oder eine Mehrzahl von Bypässen 11 an unterschiedlichen Orten anschliessen bzw. angeschlossen werden können, um in oben beschriebener Weise Nebenluft beim Ansaugen von flüssigem Medium zu reduzieren bzw. die Freistromkreiselpumpe F3 zu entlüften.In the exemplary embodiment of the present invention according to FIG. 3, a free-flow centrifugal pump F 3 of conventional type is shown in which at least one or a plurality of bypasses 11 can be connected or connected at different locations in a pump housing 5, in particular in a lower housing part 6 in the manner described above to reduce secondary air during the aspiration of liquid medium or to vent the free-flow centrifugal pump F 3 .

Auf diese Weise lässt sich auch ein Mindestfüllstand zum Betreiben der Freistromkreiselpumpe F3 erheblich reduzieren.In this way, a minimum level for operating the free-flow centrifugal pump F 3 can be significantly reduced.

Ferner soll im Rahmen der vorliegenden Erfindung liegen, dass zusätzlich oberhalb des Flügelrades 4, und oberhalb des Pumpengehäuses 5 in einem Zwischengehäuse 15, insbesondere bei Unterdruck zusätzlich Sperrflüssigkeit, bspw. als reines Kühlschmiermittel über eine separate Zuführleitung 16 zugeführt werden kann, so dass ein Ansaugen von Nebenluft im lagerseitigen Bereich der Antriebswelle 3 zusätzlich vermieden bzw. reduziert wird.Furthermore, it should be within the scope of the present invention that additionally above the impeller 4, and above the pump housing 5 in an intermediate housing 15, in particular at negative pressure in addition sealing liquid, for example. Can be supplied as pure coolant through a separate supply line 16, so that an intake of secondary air in the bearing side region of the drive shaft 3 is additionally avoided or reduced.

Dies soll ebenfalls im Rahmen der vorliegenden Erfindung liegen.This should also be within the scope of the present invention.

Wichtig ist jedoch bei der vorliegenden Erfindung, dass insbesondere der Bypass 11 vorzugsweise zentrisch vor der Ansaugöffnung 7 der Freistromkreiselpumpe F3 zugeordnet werden kann oder direkt in den unteren Gehäuseteil 6 des Pumpengehäuses 5 einmündet, so dass die Auslassöffnung 12 des Bypasses 11 auf das Flügelrad 4 der Freistromkreiselpumpe F3 ausgerichtet ist. Dabei kann der Bypass 11 im Pumpengehäuse 5 bzw. Gehäuseteil 6 axial, oder radial oder dazwischenliegend axial bis radial auf das Flügelrad 4 ausgerichtet sein. Bevorzugt ist jedoch die Ausführung, dass der Bypass 11 zentrisch und beabstandet vor Ansaugöffnung 7 angeordnet ist.However, it is important in the present invention that in particular the bypass 11 preferably centrally in front of the suction port 7 of the free-flow centrifugal pump F 3 can be assigned or opens directly into the lower housing part 6 of the pump housing 5, so that the outlet port 12 of the bypass 11 to the impeller. 4 the free-stream centrifugal pump F 3 is aligned. In this case, the bypass 11 in the pump housing 5 or housing part 6 axially, or radially or intervening axially to radially aligned with the impeller 4. Preferably, however, is the embodiment that the bypass 11 is arranged centrally and spaced from the intake opening 7.

Ferner kann auf ein Ansaugverhalten bzw. ein Entlüftungsverhalten Einfluss genommen werden, in dem der Volumenstrom bzw. der Druck des flüssigen Mediums auf den Bypass 11 verändert wird oder ein Abstand zwischen Bypass 11 bzw. Auslassöffnung 12 und Ansaugöffnung 7 verändert bzw. variiert wird. Dies soll ebenfalls im Rahmen der vorliegenden Erfindung liegen.Furthermore, it is possible to influence an intake behavior or a venting behavior in which the volume flow or the pressure of the liquid medium is changed to the bypass 11 or a distance between bypass 11 or outlet opening 12 and intake opening 7 is changed or varied. This should also be within the scope of the present invention.

PositionszahlenlistePosition Number List

11 Hebebehälterlifting container 3434 6767 22 Antriebseinheitdrive unit 3535 6868 33 Antriebswelledrive shaft 3636 6969 44 Flügelradimpeller 3737 7070 55 Pumpengehäusepump housing 3838 7171 66 Gehäuseteilhousing part 3939 7272 77 Ansaugöffnungsuction 4040 7373 88th Auslassoutlet 4141 7474 99 Spülrinnerinsing channel 4242 7575 1010 WannenbodenWannenboden 4343 7676 1111 Bypassbypass 4444 7777 1212 Auslassöffnungoutlet 4545 7878 1313 Untergrundunderground 4646 7979 1414 Saugleitungsuction 4747 1515 Zwischengehäuseintermediate housing 4848 R1 R 1 Hebeeinrichtunglifter 1616 Zuführleitungfeed 4949 R2 R 2 Hebeeinrichtunglifter 1717 5050 1818 5151 1919 5252 F1 F 1 FreistromkreiselpumpeFree-flow centrifugal pump 2020 5353 F2 F 2 FreistromkreiselpumpeFree-flow centrifugal pump 2121 5454 F3 F 3 FreistromkreiselpumpeFree-flow centrifugal pump 2222 5555 2323 5656 2424 5757 2525 5858 2626 5959 2727 6060 2828 6161 2929 6262 3030 6363 3131 6464 3232 6565 3333 6666

Claims (21)

  1. Method of operating a lifting device (R1, R2) for pumping out contaminated liquid media, such as cooling lubricant using at least one free-flow centrifugal pump (F1, F2, F3),
    characterized in
    that a liquid medium permanently impinges on an intake opening (7) of the free-flow centrifugal pump (F1, F2, F3) through a bypass (11), wherein an outlet opening (12) of the bypass (11) is spaced apart from the intake opening (7), and approximately 5% to 15% of the volumetric displacement of the free-flow centrifugal pump (F1, F2, F3) is fed through the bypass (11) onto the impeller (4).
  2. Method of operating a lifting device (R1, R2) for pumping out contaminated liquid media, such as cooling lubricant using at least one free-flow centrifugal pump (F1, F2, F3), characterized in that a liquid medium permanently impinges on an intake region of the free-flow centrifugal pump (F1, F2, F3) through a bypass (11), wherein through [sic] an outlet opening (12) of the bypass (11) is spaced apart from the intake region of the free-flow centrifugal pump (F1, F2, F3), and the bypass (11) is disposed approximately centrally and at a distance in front of the intake opening (7), and the liquid medium from the bypass (11) impinges or is accelerated approximately vertically onto the impeller (4) of the free-flow centrifugal pump (F1, F2, F3).
  3. Method according to claim 1 or 2, characterized in that, as a liquid medium, cooling lubricant flows through a bypass (11) against the intake opening (7) or the intake region, in particular the region of the impeller (4) of the free-flow centrifugal pump (F1, F2, F3).
  4. Method according to at least one of claims 1 to 3, characterized in that an outlet opening (12) of the bypass (11) is disposed at a distance from an intake opening (7) so that some of the liquid medium permanently impinges on and/or flows against the impeller (4) of the free-flow centrifugal pump (F1, F2, F3).
  5. Method according to claim 3 or 4, characterized in that the bypass (11) opens out in a housing part (6) of the free-flow centrifugal pump (F1, F2, F3) close to the impeller (4).
  6. Method according to at least one of claims 1 to 5, characterized in that preferably 10% of the volumetric displacement of the free-flow centrifugal pump (F1, F2, F3) is fed through the bypass (11) onto the impeller (4).
  7. Method according to at least one of claims 3 to 6, characterized in that the liquid medium, in particular the cooling lubricant, impinges at a pressure of approximately 0.2 bar to 3 bar, in particular 0.5 bar out of the bypass (11) onto the impeller (4), the intake opening (7) or the intake region of the free-flow centrifugal pump (F1, F2, F3).
  8. Method according to at least one of claims 3 to 7, characterized in that the bypass (11) opens out, given a vertical arrangement of the free-flow centrifugal pump (F1, F3), in a trough base (10) of the lifting device (R1, R2) and, given a horizontal arrangement of the free-flow centrifugal pump (F2), into a suction line (14) of the lifting device (R1, R2).
  9. Method according to at least one of claims 1 to 8, characterized in that, given a vacuum in the free-flow centrifugal pump (F1, F2, F3), sealing liquid is additionally fed on the drive-shaft side above the impeller (4).
  10. Lifting device for pumping out contaminated liquid media, such as cooling lubricant comprising at least one free-flow centrifugal pump (F1, F2, F3), characterized in that through at least one bypass (11) liquid medium may impinge on an intake opening (7) or an intake region of the free-flow centrifugal pump (F1, F2, F3), wherein an outlet opening (12) of the bypass (11) is spaced apart from the intake opening (7) or the intake region of the free-flow centrifugal pump (F1, F2, F3) and a volumetric displacement of liquid medium of approximately 5% to 15% of the volumetric displacement of the free-flow centrifugal pump (F1, F2, F3) is feedable through the bypass (11).
  11. Lifting device according to claim 10, characterized in that the bypass (11) is disposed in a housing part (6) of the free-flow centrifugal pump (F1, F2, F3), and an outlet opening (12) of the bypass (11) is aligned with the impeller 4 of the free-flow centrifugal pump (F1, F2, F3).
  12. Lifting device according to claim 10 or 11, characterized in that the bypass (11) is provided in the region of a trough base (10), and is aligned with impeller (4) of the free-flow centrifugal pump (F1, F2, F3), wherein an outlet opening (12) of the bypass (11) is spaced apart from, in particular height-adjustable relative to, the intake opening (7) of the free-flow centrifugal pump (F1, F2, F3).
  13. Lifting device according to at least one of claims 10 to 12, characterized in that, given a horizontal style of construction, at least one bypass (11) opens out onto a suction line (14) of the free-flow centrifugal pump (F2) that adjoins the intake region, wherein an outlet opening (12) of the bypass (11) is preferably aligned centrally with the impeller (4) of the free-flow centrifugal pump (F2).
  14. Lifting device according to at least one of claims 10 to 13, characterized in that at least one bypass (11) adjoins in a housing part (6) close to the impeller (4) of the free-flow centrifugal pump (F1, F2, F3), and the outlet opening (12) of the bypass (11) is aligned axially to radially with the impeller (4).
  15. Lifting device according to at least one of claims 10 to 14, characterized in that the liquid medium, in particular cooling lubricant is feedable at a pressure of 0.2 bar to 3 bar, in particular 1 bar.
  16. Lifting device according to at least one of claims 10 to 15, characterized in that a volumetric displacement of liquid medium, in particular cooling lubricant, of approximately 5% to 15%, in particular 10% of the volumetric displacement of the free-flow centrifugal pump (F1, F2, F3) is feedable through the bypass (11).
  17. Lifting device according to at least one of claims 11 to 17, characterized in that a feed line (16), which opens out into an intermediate housing (15) and through which sealing liquid is feedable in the event of vacuum operation, [sic] the free-flow centrifugal pump (F1, F2, F3) above the impeller (4).
  18. Free-flow centrifugal pump for pumping out contaminated liquid media, such as cooling lubricant, comprising an impeller (4) and an intake opening (7), characterized in that liquid medium is additionally feedable to the intake opening (7), the intake region or the impeller (4) through at least one bypass (11, wherein an outlet opening (12) of the bypass (11) is spaced apart from the intake opening (7) or the intake region of the free-flow centrifugal pump (F1, F2, F3), and the bypass (11) is aligned outside of and at a distance from an intake opening (7), wherein an opening of the bypass (11), situated approximately vertically and centrically in an axis, is aligned axially with the impeller (4).
  19. Free-flow centrifugal pump according to claim 18, characterized in that the bypass (11) opens out into a housing part (6), and an outlet opening (12) of the bypass (11) is aligned axially, radially as well as axially to radially with an impeller (4).
  20. Free-flow centrifugal pump according to at least one [of] claims 18 and 19, characterized in that liquid medium, in particular cooling lubricant is feedable at a pressure of 0.2 bar to 3 bar, in particular 1 bar through the bypass (11) to the impeller (4).
  21. Free-flow centrifugal pump according to at least one of claims 18 to 21, characterized in that approximately 5% to 15%, in particular 10% of the total volumetric displacement of the free-flow centrifugal pump (F1, F2, F3) is feedable through the bypass (11) to the impeller (4).
EP04022303A 2003-10-08 2004-09-20 Method to operate a lifting equipment to pump contaminated liquids, in particular cooling lubricant Expired - Lifetime EP1522734B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04022303T PL1522734T3 (en) 2003-10-08 2004-09-20 Method to operate a lifting equipment to pump contaminated liquids, in particular cooling lubricant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347261 2003-10-08
DE10347261A DE10347261A1 (en) 2003-10-08 2003-10-08 Method for operating a lifting device for pumping out contaminated liquid media, in particular cooling lubricants

Publications (2)

Publication Number Publication Date
EP1522734A1 EP1522734A1 (en) 2005-04-13
EP1522734B1 true EP1522734B1 (en) 2007-09-19

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Family Applications (1)

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EP04022303A Expired - Lifetime EP1522734B1 (en) 2003-10-08 2004-09-20 Method to operate a lifting equipment to pump contaminated liquids, in particular cooling lubricant

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Country Link
EP (1) EP1522734B1 (en)
AT (1) ATE373780T1 (en)
DE (2) DE10347261A1 (en)
PL (1) PL1522734T3 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034033B (en) * 1956-01-05 1958-07-10 Karl Wernert Pump system with a centrifugal pump arranged above the liquid level
FR1403881A (en) * 1964-05-15 1965-06-25 Worthington Rotary pump equipped with a forced feed device
US4188172A (en) * 1978-05-24 1980-02-12 The United States Of America As Represented By The Secretary Of The Navy Method and means for injecting hot liquid when pumping cold liquid
US4792275A (en) * 1986-12-24 1988-12-20 Eddy Pump Corporation Pump construction
US5114312A (en) * 1990-06-15 1992-05-19 Atsco, Inc. Slurry pump apparatus including fluid housing
DE9213913U1 (en) * 1992-10-15 1993-01-14 Scheible Versorgungsanlagen GmbH, 7340 Geislingen Device for disposal of liquid media
DE19804907C1 (en) * 1998-02-07 1999-07-15 Brinkmann Pumpen K H Brinkmann Rotary fluid pump
DE19962729A1 (en) * 1999-12-23 2001-07-05 Grundfos As Self-priming pump unit
DE10118525B4 (en) * 2001-04-14 2005-03-17 Brinkmann Pumpen K.H. Brinkmann Gmbh & Co. Kg Device for extracting cooling lubricant from a reservoir

Also Published As

Publication number Publication date
ATE373780T1 (en) 2007-10-15
EP1522734A1 (en) 2005-04-13
PL1522734T3 (en) 2008-02-29
DE502004005002D1 (en) 2007-10-31
DE10347261A1 (en) 2005-05-04

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