EP3417175B1 - Packaging machine with vacuum pump - Google Patents

Packaging machine with vacuum pump Download PDF

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Publication number
EP3417175B1
EP3417175B1 EP17701691.2A EP17701691A EP3417175B1 EP 3417175 B1 EP3417175 B1 EP 3417175B1 EP 17701691 A EP17701691 A EP 17701691A EP 3417175 B1 EP3417175 B1 EP 3417175B1
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EP
European Patent Office
Prior art keywords
vacuum pump
packaging machine
controller
electric motor
valve
Prior art date
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Application number
EP17701691.2A
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German (de)
French (fr)
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EP3417175A1 (en
Inventor
Guido Spix
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Multivac Sepp Haggenmueller GmbH and Co KG
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Multivac Sepp Haggenmueller GmbH and Co KG
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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
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/068—Mechanical details of the pump control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F04C2240/403—Electric motor with inverter for speed control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps

Definitions

  • the invention relates to the field of packaging machines with a vacuum pump.
  • the invention relates to a vacuum pump with an integrated control.
  • Vacuum pumps such as rotary vane pumps or screw pumps have three-phase motors as a drive and their start-up control is implemented via an electrical circuit using contactors in a switch box.
  • Valves which are provided between the vacuum pump and the tool to be evacuated in packaging machines, are actuated via a control of the packaging machine. Information about processes, errors or necessary maintenance of the vacuum pump is not available.
  • a turbo molecular pump is disclosed in which the vacuum pump and measuring devices have a common device for supply and control. The aim is to reduce the installation effort and space requirements.
  • the preamble of claim 1 is taken from US 2013/0259717 A1 known. This describes a vacuum pump for use in a packaging machine, a housing of the vacuum pump comprising a box in which a part of the electric motor and control electronics for the same are present.
  • the DE 20 2015 003 927 U1 describes a vacuum pump with control electronics that are configured to stop the vacuum pump when a signal from an acceleration sensor exceeds a predetermined acceleration.
  • a vacuum pump of a packaging machine comprises an electric motor, a pressure generator unit and a housing.
  • the vacuum pump is characterized in that a control is provided in or on the housing of the vacuum pump.
  • the vacuum pump is particularly suitable for use in a packaging machine if it is able to evacuate the volume of typical sealing or molding tools of such packaging machines from normal pressure to a vacuum of, for example, 10 mbar or even 5 mbar within seconds.
  • the expression "in the housing of the vacuum pump” means that the control is located in that part of the housing of the vacuum pump which surrounds at least the pressure generator unit and optionally also the electric motor.
  • the control can be provided "on the housing of the vacuum pump”; for this purpose, the control can be connected to the outside of the housing of the vacuum pump, for example in the form of a (terminal) box.
  • the control is preferably designed at least as a start-up control and / or switching of the electric motor.
  • the control is via a bus line for data transfer with a machine control of the
  • both the electric motor can be controlled by means of the machine control or a dedicated button on a control panel and data from the control of the vacuum pump can also be transmitted to a machine control in order to be able to display or evaluate this data.
  • data for diagnosis and / or maintenance can be transmitted to the machine control, the data containing measured values from at least one sensor, for example the engine temperature or the oil level, which was previously read or checked via a sight glass on the housing.
  • the vacuum pump has at least one sensor, preferably a vibration sensor, an oil level sensor, a temperature sensor, a flow sensor and / or a vacuum sensor.
  • This has the advantage of storing value ranges for the respective measured values of the various sensors in the control of the vacuum pump itself or in the machine control of the packaging machine, with the aid of which a message can be displayed to a machine operator in order to carry out maintenance or troubleshooting.
  • the controller preferably has a frequency control for the electric motor, which is designed as a three-phase motor, or the controller has a servo controller for the electric motor, which is designed as a servomotor. This saves energy by reducing the speed of the electric motor when there is no need for a vacuum and possibly evacuating against a closed valve. Furthermore, the power can also be adapted to the requirements of an evacuation process by means of the change in speed in order to increase the evacuation power.
  • the control can preferably be connected to at least one valve in order to switch the valve by means of the control.
  • a shut-off valve is provided in particular on a suction side of the vacuum pump. This is particularly advantageous when carrying out a gassing process in a thermoforming packaging machine by means of pure oxygen, in order to prevent pure oxygen from being sucked into the pressure generator unit, since there would be a risk of an explosion. With this design, an expensive special design of such a vacuum pump can be dispensed with.
  • valve as a linear valve or as a proportional valve in order to positively influence an evacuation process on a sealing tool or the generation of a negative pressure on a molding tool.
  • An embodiment as an electrically operated valve enables a packaging machine with a vacuum pump that does not require compressed air and only has an electrical supply.
  • the vacuum pump according to the invention is preferably a screw pump or a rotary vane pump.
  • Figure 1 a schematic representation of a thermoforming packaging machine and a vacuum pump according to the invention.
  • Fig. 1 shows a schematically illustrated packaging machine in the form of a thermoforming packaging machine 1 with a switch cabinet 2 and a machine control 3, the machine control 3 comprising a display and input device 4 and a start button 5.
  • the thermoforming packaging machine 1 has a forming station 6 with a forming tool 7 in order to thermoform a film web. It also has a sealing station 8 with a sealing tool 9 in order to evacuate and / or gas the inside of a deep-drawn and product-filled trough before a cover film is sealed onto the troughs in order to produce an airtight packaging.
  • a thermoforming packaging machine of this type is for example in DE 10 2010 019 634 B3 disclosed.
  • Fig. 1 further shows schematically (and considerably enlarged in relation to the packaging machine 1) a vacuum pump 10 according to the invention, preferably a screw pump or rotary vane pump, which comprises an electric motor 11 as a drive for a pressure generator unit 12.
  • the electric motor 11 can also be designed as a three-phase motor or a servomotor, and the pressure generator unit 12 generates a negative pressure on a suction side 13 of the vacuum pump 10.
  • the vacuum pump 10 has a housing 14 in which a controller 15 is provided, and the controller 15 is connected to the machine controller 3 by means of a bus line 16. Data and control commands can be transmitted between the controllers 3, 15 via this bus line 16.
  • a power line 30 supplies the controller 15 with at least the electrical energy that is provided for operating the electric motor 11.
  • the power line 30 can also be provided for the supply of a processor and switching elements in the controller 15.
  • the controller 15 is connected to a valve 18 on the suction side 13 of the vacuum pump 10 by means of at least one control line 17.
  • the valve 18 can be arranged inside the housing 14 or on the housing 14 on the suction side 13.
  • the valve 18 can be provided as a shut-off valve.
  • the valve 18 can have a servomotor 19, which is connected via the controller 15 by means of a control line 20, and can be operated in order to be able to generate different cross-sections in a vacuum line 21.
  • the vacuum line 21 connects the vacuum pump 10 to the sealing tool 9 and / or to the molding tool 7.
  • the vacuum pump 10 has an oil level sensor 22, which is connected to the controller 15, in order to be able to detect and evaluate the current oil level or if the oil level in an oil bath of the pressure generator unit 12 is below an assumed oil level, as well as a message to the machine controller if necessary 3, which is displayed to the operator of the packaging machine 1 on the display device 4.
  • a vibration sensor 23 connected to the controller 15 is also provided on the pressure generator unit 12, on the electric motor 11 and / or on the housing 14 in order to detect damage or any changes in vibration behavior via the controller 15 and to transmit information about this to the machine controller 3.
  • a vacuum sensor 24 or a flow sensor 25 can be provided on the intake side 13 in order to be able to process the recorded measured values in the controller 15 for regulating or controlling the electric motor 11 and / or the valve 18.
  • the controller 15 controls or regulates the speed of the electric motor 11 in accordance with the processes running in the packaging machine 1.
  • a temperature sensor 26 monitors the temperature of the winding of the electric motor and the controller 15 is configured to switch off the electric motor 11 in the event of a fault.
  • the controller 15 has a servo controller for a servomotor as an electric motor 11. It is also conceivable that the controller 15 has a frequency controller for a three-phase motor as an electric motor 11.
  • the controller 15 can also include a motor controller and / or start-up controller for the electric motor 11, which is preferably designed as a three-phase motor.
  • the space requirement in the control cabinet 2 can be reduced by eliminating circuits with contactors and wiring.
  • the values of the sensors can all be forwarded to the machine control 3 via the bus line 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Vacuum Packaging (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Description

Die Erfindung betrifft das Gebiet der Verpackungsmaschinen mit einer Vakuumpumpe. Insbesondere betrifft die Erfindung eine Vakuumpumpe mit einer integrierten Steuerung. Vakuumpumpen wie Drehschieberpumpen oder Schraubenpumpen weisen Drehstrommotoren als Antrieb auf und deren Anlaufsteuerung ist über eine elektrische Schaltung mittels Schaltschützen in einem Schaltkasten realisiert. Ventile, die zwischen der Vakuumpumpe und dem zu evakuierenden Werkzeug bei Verpackungsmaschinen vorgesehen sind, werden über eine Steuerung der Verpackungsmaschine betätigt. Informationen über Prozesse, Fehler oder eine notwendige Wartung der Vakuumpumpe stehen nicht zur Verfügung.The invention relates to the field of packaging machines with a vacuum pump. In particular, the invention relates to a vacuum pump with an integrated control. Vacuum pumps such as rotary vane pumps or screw pumps have three-phase motors as a drive and their start-up control is implemented via an electrical circuit using contactors in a switch box. Valves, which are provided between the vacuum pump and the tool to be evacuated in packaging machines, are actuated via a control of the packaging machine. Information about processes, errors or necessary maintenance of the vacuum pump is not available.

Aus der DE 44 10 903 A1 ist eine Turbomolekularpumpe offenbart, bei der die Vakuumpumpe und Meßgeräte eine gemeinsame Einrichtung zur Versorgung und zur Steuerung haben. Ziel ist es dabei, den Installationsaufwand und den Platzbedarf zu reduzieren.From the DE 44 10 903 A1 a turbo molecular pump is disclosed in which the vacuum pump and measuring devices have a common device for supply and control. The aim is to reduce the installation effort and space requirements.

Der Oberbegriff von Anspruch 1 ist aus der US 2013/0259717 A1 bekannt. Diese beschreibt eine Vakuumpumpe zum Einsatz in einer Verpackungsmaschine, wobei ein Gehäuse der Vakuumpumpe eine Box umfasst, in der ein Teil des Elektromotors und eine Steuerelektronik für denselben vorliegen.The preamble of claim 1 is taken from US 2013/0259717 A1 known. This describes a vacuum pump for use in a packaging machine, a housing of the vacuum pump comprising a box in which a part of the electric motor and control electronics for the same are present.

Die DE 20 2015 003 927 U1 beschreibt eine Vakuumpumpe mit einer Steuerungselektronik, die dazu konfiguriert ist, die Vakuumpumpe anzuhalten, wenn ein Signal eines Beschleunigungssensors eine vorgegebene Beschleunigung überschreitet.the DE 20 2015 003 927 U1 describes a vacuum pump with control electronics that are configured to stop the vacuum pump when a signal from an acceleration sensor exceeds a predetermined acceleration.

Es ist Aufgabe der Erfindung, eine verbesserte Verpackungsmaschine mit einer Vakuumpumpe zur Verfügung zu stellen.It is the object of the invention to provide an improved packaging machine with a vacuum pump.

Diese Aufgabe wird durch den Gegenstand von Anspruch 1 gelöst. Die abhängigen Ansprüche geben vorteilhafte Ausführungsformen der Erfindung an.This object is achieved by the subject matter of claim 1. The dependent claims specify advantageous embodiments of the invention.

Eine Vakuumpumpe einer erfindungsgemäßen Verpackungsmaschine umfasst einen Elektromotor, eine Druckerzeugereinheit und ein Gehäuse. Die Vakuumpumpe zeichnet sich dadurch aus, dass eine Steuerung im oder am Gehäuse der Vakuumpumpe vorgesehen ist. Somit kann der Installationsaufwand zwischen der Vakuumpumpe und einem Schaltschrank vereinfacht werden und im Falle eines Austauschs der Vakuumpumpe gegen einen anderen Pumpentyp ohne Anpassungen im Schaltschrank bzw. an der Verpackungsmaschine ersetzt werden.A vacuum pump of a packaging machine according to the invention comprises an electric motor, a pressure generator unit and a housing. The vacuum pump is characterized in that a control is provided in or on the housing of the vacuum pump. The installation effort between the vacuum pump and a control cabinet can thus be simplified and, if the vacuum pump is exchanged for a different type of pump, it can be replaced without adjustments in the control cabinet or on the packaging machine.

Die Eignung zum Einsatz für eine Verpackungsmaschine weist die die Vakuumpumpe insbesondere dann auf, wenn sie in der Lage ist, das Volumen typischer Siegel- oder Formwerkzeuge solcher Verpackungsmaschinen innerhalb von Sekunden von Normaldruck auf ein Vakuum von beispielsweise 10mbar oder sogar 5mbar zu evakuieren. Mit dem Ausdruck "im Gehäuse der Vakuumpumpe" ist gemeint, dass sich die Steuerung in demjenigen Teil des Gehäuses der Vakuumpumpe befindet, das zumindest die Druckerzeugereinheit und optional auch den Elektromotor umgibt. Alternativ dazu kann die Steuerung "am Gehäuse der Vakuumpumpe" vorgesehen sein; dazu kann die Steuerung beispielsweise in Form eines (Klemmen-)Kastens mit der Außenseite des Gehäuses der Vakuumpumpe verbunden sein.The vacuum pump is particularly suitable for use in a packaging machine if it is able to evacuate the volume of typical sealing or molding tools of such packaging machines from normal pressure to a vacuum of, for example, 10 mbar or even 5 mbar within seconds. The expression "in the housing of the vacuum pump" means that the control is located in that part of the housing of the vacuum pump which surrounds at least the pressure generator unit and optionally also the electric motor. Alternatively, the control can be provided "on the housing of the vacuum pump"; for this purpose, the control can be connected to the outside of the housing of the vacuum pump, for example in the form of a (terminal) box.

Dabei ist die Steuerung vorzugsweise wenigstens als Anlaufsteuerung und/oder Schaltung des Elektromotors ausgeführt.The control is preferably designed at least as a start-up control and / or switching of the electric motor.

Die Steuerung ist über eine Busleitung zum Datentransfer mit einer Maschinensteuerung derThe control is via a bus line for data transfer with a machine control of the

Verpackungsmaschine verbunden. Hierdurch kann beispielsweise sowohl der Elektromotor mittels der Maschinensteuerung oder eines eigenen Tasters an einem Bedienpult angesteuert werden und es können beispielsweise auch Daten aus der Steuerung der Vakuumpumpe an eine Maschinensteuerung zu übermittelt werden, um diese Daten anzeigen oder auswerten zu können. Mittels der Busleitung sind Daten zur Diagnose und/oder zur Wartung an die Maschinensteuerung übermittelbar, wobei die Daten Messwerte von wenigstens einem Sensor beinhalten, beispielsweise die Motortemperatur oder der Ölstand, der bisher über ein Schauglas an dem Gehäuse abzulesen bzw. zu kontrollieren war.Packaging machine connected. In this way, for example, both the electric motor can be controlled by means of the machine control or a dedicated button on a control panel and data from the control of the vacuum pump can also be transmitted to a machine control in order to be able to display or evaluate this data. Via the bus line, data for diagnosis and / or maintenance can be transmitted to the machine control, the data containing measured values from at least one sensor, for example the engine temperature or the oil level, which was previously read or checked via a sight glass on the housing.

Die Vakuumpumpe weist wenigstens einen Sensor auf, vorzugsweise einen Schwingungssensor, einen Ölstandssensor, einen Temperatursensor, einen Strömungssensor und/oder einen Unterdrucksensor. Dies bringt den Vorteil mit sich, in der Steuerung der Vakuumpumpe selbst oder in der Maschinensteuerung der Verpackungsmaschine Wertebereiche für die jeweiligen Messwerte der verschiedenen Sensoren zu hinterlegen, anhand derer einem Maschinenbediener eine Hinweismeldung angezeigt werden kann, um eine Wartung oder Fehlerbehebung vorzunehmen.The vacuum pump has at least one sensor, preferably a vibration sensor, an oil level sensor, a temperature sensor, a flow sensor and / or a vacuum sensor. This has the advantage of storing value ranges for the respective measured values of the various sensors in the control of the vacuum pump itself or in the machine control of the packaging machine, with the aid of which a message can be displayed to a machine operator in order to carry out maintenance or troubleshooting.

Bevorzugt weist die Steuerung eine Frequenzregelung für den Elektromotor auf, wobei dieser als Drehstrommotor ausgeführt ist, oder die Steuerung weist eine Servosteuerung für den Elektromotor auf, wobei dieser als Servomotor ausgeführt ist. Dabei wird Energie eingespart, indem die Drehzahl des Elektromotors reduziert wird, wenn kein Vakuumbedarf vorliegt und dabei eventuell gegen ein geschlossenes Ventil evakuiert werden würde. Des Weiteren kann auch die Leistung mittels der Drehzahlveränderung an den Bedarf eines Evakuierungsprozesses angepasst werden, um die Evakuierungsleistung zu steigern.The controller preferably has a frequency control for the electric motor, which is designed as a three-phase motor, or the controller has a servo controller for the electric motor, which is designed as a servomotor. This saves energy by reducing the speed of the electric motor when there is no need for a vacuum and possibly evacuating against a closed valve. Furthermore, the power can also be adapted to the requirements of an evacuation process by means of the change in speed in order to increase the evacuation power.

Die Steuerung ist vorzugsweise mit wenigstens einem Ventil verbindbar, um das Ventil mittels der Steuerung zu schalten. Dabei ist insbesondere an einer Ansaugseite der Vakuumpumpe ein Absperrventil vorgesehen. Dies ist besonders vorteilhaft bei einer Ausführung eines Begasungsvorgangs bei einer Tiefziehverpackungsmaschine mittels reinem Sauerstoff, um das Ansaugen von reinem Sauerstoff in die Druckerzeugereinheit zu verhindern, da die Gefahr einer Explosion bestehen würde. Mit dieser Ausführung kann auf eine kostenintensive Spezialausführung einer solchen Vakuumpumpe verzichtet werden.The control can preferably be connected to at least one valve in order to switch the valve by means of the control. In this case, a shut-off valve is provided in particular on a suction side of the vacuum pump. This is particularly advantageous when carrying out a gassing process in a thermoforming packaging machine by means of pure oxygen, in order to prevent pure oxygen from being sucked into the pressure generator unit, since there would be a risk of an explosion. With this design, an expensive special design of such a vacuum pump can be dispensed with.

Alternativ ist es ebenso vorteilhaft, das Ventil als Linearventil oder als Proportionalventil auszuführen, um einen Evakuierprozess an einem Siegelwerkzeug oder eine Erzeugung eines Formunterdrucks an einem Formwerkzeug positiv zu beeinflussen. Eine Ausführung als elektrisch betätigbares Ventil ermöglicht eine Verpackungsmaschine mit einer Vakuumpumpe, die keine Druckluft benötigt und lediglich eine elektrische Versorgung aufweist.Alternatively, it is also advantageous to design the valve as a linear valve or as a proportional valve in order to positively influence an evacuation process on a sealing tool or the generation of a negative pressure on a molding tool. An embodiment as an electrically operated valve enables a packaging machine with a vacuum pump that does not require compressed air and only has an electrical supply.

Die erfindungsgemäße Vakuumpumpe ist vorzugsweise eine Schraubenpumpe oder eine Drehschieberpumpe.The vacuum pump according to the invention is preferably a screw pump or a rotary vane pump.

Im Folgenden wird die Erfindung anhand von Ausführungsformen mit der beigefügten Zeichnung erläutert. Dabei zeigt:
Figur 1: eine schematische Darstellung einer Tiefziehverpackungsmaschine und einer erfindungsgemäßen Vakuumpumpe.In the following, the invention is explained on the basis of embodiments with the attached drawing. It shows:
Figure 1 : a schematic representation of a thermoforming packaging machine and a vacuum pump according to the invention.

Fig. 1 zeigt eine schematisch dargestellte Verpackungsmaschine in Form einer Tiefziehverpackungsmaschine 1 mit einem Schaltschrank 2 und einer Maschinensteuerung 3, wobei die Maschinensteuerung 3 eine Anzeige- und Eingabevorrichtung 4 und einen Starttaster 5 umfasst. Fig. 1 shows a schematically illustrated packaging machine in the form of a thermoforming packaging machine 1 with a switch cabinet 2 and a machine control 3, the machine control 3 comprising a display and input device 4 and a start button 5.

Die Tiefziehverpackungsmaschine 1 weist eine Formstation 6 mit einem Formwerkzeug 7 auf, um eine Folienbahn tiefzuziehen. Sie weist auch noch eine Siegelstation 8 mit einem Siegelwerkzeug 9 auf, um das Innere einer tiefgezogenen und mit Produkt gefüllten Mulde zu evakuieren und/oder zu begasen, bevor eine Deckelfolie auf die Mulden gesiegelt wird, um eine luftdichte Verpackung zu erzeugen. Eine Tiefziehverpackungsmaschine dieser Art ist beispielsweise in DE 10 2010 019 634 B3 offenbart.The thermoforming packaging machine 1 has a forming station 6 with a forming tool 7 in order to thermoform a film web. It also has a sealing station 8 with a sealing tool 9 in order to evacuate and / or gas the inside of a deep-drawn and product-filled trough before a cover film is sealed onto the troughs in order to produce an airtight packaging. A thermoforming packaging machine of this type is for example in DE 10 2010 019 634 B3 disclosed.

Fig. 1 zeigt weiterhin schematisch (und erheblich vergrößert im Verhältnis zur Verpackungsmaschine 1) eine erfindungsgemäße Vakuumpumpe 10, vorzugsweise eine Schraubenpumpe oder Drehschieberpumpe, die einen Elektromotor 11 als Antrieb für eine Druckerzeugereinheit 12 umfasst. Der Elektromotor 11 kann auch als Drehstrommotor oder Servomotor ausgeführt sein und die Druckerzeugereinheit 12 erzeugt einen Unterdruck an einer Ansaugseite 13 der Vakuumpumpe 10. Fig. 1 further shows schematically (and considerably enlarged in relation to the packaging machine 1) a vacuum pump 10 according to the invention, preferably a screw pump or rotary vane pump, which comprises an electric motor 11 as a drive for a pressure generator unit 12. The electric motor 11 can also be designed as a three-phase motor or a servomotor, and the pressure generator unit 12 generates a negative pressure on a suction side 13 of the vacuum pump 10.

Die Vakuumpumpe 10 weist ein Gehäuse 14 auf, in dem eine Steuerung 15 vorgesehen ist, und die Steuerung 15 ist mittels einer Busleitung 16 mit der Maschinensteuerung 3 verbunden. Über diese Busleitung 16 können Daten und Steuerbefehle zwischen den Steuerungen 3, 15 übertragen werden. Eine Energieleitung 30 versorgt die Steuerung 15 mit wenigstens der elektrischen Energie, die zum Betrieb des Elektromotors 11 vorgesehen ist. Die Energieleitung 30 kann auch für die Versorgung eines Prozessors und Schaltelementen in der Steuerung 15 vorgesehen sein.The vacuum pump 10 has a housing 14 in which a controller 15 is provided, and the controller 15 is connected to the machine controller 3 by means of a bus line 16. Data and control commands can be transmitted between the controllers 3, 15 via this bus line 16. A power line 30 supplies the controller 15 with at least the electrical energy that is provided for operating the electric motor 11. The power line 30 can also be provided for the supply of a processor and switching elements in the controller 15.

Die Steuerung 15 ist mittels wenigstens einer Steuerleitung 17 mit einem Ventil 18 an der Ansaugseite 13 der Vakuumpumpe 10 verbunden. Das Ventil 18 kann innerhalb des Gehäuses 14 oder am Gehäuse 14 an der Ansaugseite 13 angeordnet sein. Das Ventil 18 kann als Absperrventil vorgesehen sein. Das Ventil 18 kann einen Stellmotor 19 aufweisen, der über die Steuerung 15 mittels einer Steuerleitung 20 verbunden ist, und betrieben werden, um unterschiedliche Querschnitte in einer Vakuumleitung 21 erzeugen zu können. Die Vakuumleitung 21 verbindet die Vakuumpumpe 10 mit dem Siegelwerkzeug 9 und/oder mit dem Formwerkzeug 7.The controller 15 is connected to a valve 18 on the suction side 13 of the vacuum pump 10 by means of at least one control line 17. The valve 18 can be arranged inside the housing 14 or on the housing 14 on the suction side 13. The valve 18 can be provided as a shut-off valve. The valve 18 can have a servomotor 19, which is connected via the controller 15 by means of a control line 20, and can be operated in order to be able to generate different cross-sections in a vacuum line 21. The vacuum line 21 connects the vacuum pump 10 to the sealing tool 9 and / or to the molding tool 7.

Die Vakuumpumpe 10 weist einen Ölstandssensor 22 auf, der mit der Steuerung 15 verbunden ist, um den aktuellen Ölstand oder eine Unterschreitung eines angenommenen Ölstands einer Ölbads der Druckerzeugereinheit 12 von der Steuerung 15 erfassen und auswerten zu können, sowie bei Bedarf eine Meldung an die Maschinensteuerung 3 weiterzugeben, die an der Anzeigevorrichtung 4 dem Bediener der Verpackungsmaschine 1 angezeigt wird.The vacuum pump 10 has an oil level sensor 22, which is connected to the controller 15, in order to be able to detect and evaluate the current oil level or if the oil level in an oil bath of the pressure generator unit 12 is below an assumed oil level, as well as a message to the machine controller if necessary 3, which is displayed to the operator of the packaging machine 1 on the display device 4.

Ebenso ist ein mit der Steuerung 15 verbundener Schwingungssensor 23 an der Druckerzeugereinheit 12, am Elektromotor 11 und/oder am Gehäuse 14 vorgesehen, um Schäden oder eine auftretende Veränderung des Schwingungsverhaltens über die Steuerung 15 zu erfassen und Informationen darüber an die Maschinensteuerung 3 zu übermitteln.A vibration sensor 23 connected to the controller 15 is also provided on the pressure generator unit 12, on the electric motor 11 and / or on the housing 14 in order to detect damage or any changes in vibration behavior via the controller 15 and to transmit information about this to the machine controller 3.

Ein Unterdrucksensor 24 oder ein Strömungssensor 25 kann an der Ansaugseite 13 vorgesehen sein, um die erfassten Messwerte in der Steuerung 15 zur Regelung bzw. Steuerung des Elektromotors 11 und/oder des Ventils 18 verarbeiten zu können. Um Energie zu sparen und die Belastung sowohl des Elektromotor 11 als auch der Druckerzeugereinheit 12 zu verringern, steuert bzw. regelt die Steuerung 15 die Drehzahl des Elektromotors 11 entsprechend der in der Verpackungsmaschine 1 ablaufenden Prozesse.A vacuum sensor 24 or a flow sensor 25 can be provided on the intake side 13 in order to be able to process the recorded measured values in the controller 15 for regulating or controlling the electric motor 11 and / or the valve 18. In order to save energy and reduce the load on both the electric motor 11 and the pressure generator unit 12, the controller 15 controls or regulates the speed of the electric motor 11 in accordance with the processes running in the packaging machine 1.

Ein Temperatursensor 26 überwacht die Temperatur der Wicklung des Elektromotors und die Steuerung 15 ist dazu konfiguriert, im Fehlerfall den Elektromotor 11 abzuschalten.A temperature sensor 26 monitors the temperature of the winding of the electric motor and the controller 15 is configured to switch off the electric motor 11 in the event of a fault.

Die Steuerung 15 weist eine Servosteuerung für einen Servomotor als Elektromotor 11 auf. Ebenso denkbar ist es, dass die Steuerung 15 eine Frequenzsteuerung für einen Drehstrommotor als Elektromotor 11 aufweist. Die Steuerung 15 kann auch eine Motorsteuerung und/oder Anlaufsteuerung für den Elektromotor 11, der vorzugsweise als Drehstrommotor ausgeführt ist, umfassen. So kann der Platzbedarf im Schaltschrank 2 durch Wegfall von Schaltungen mit Schützen und Verdrahtungsaufwand reduziert werden.The controller 15 has a servo controller for a servomotor as an electric motor 11. It is also conceivable that the controller 15 has a frequency controller for a three-phase motor as an electric motor 11. The controller 15 can also include a motor controller and / or start-up controller for the electric motor 11, which is preferably designed as a three-phase motor. Thus, the space requirement in the control cabinet 2 can be reduced by eliminating circuits with contactors and wiring.

Die Werte der Sensoren können alle über die Busleitung 16 an die Maschinensteuerung 3 weitergeleitet werden.The values of the sensors can all be forwarded to the machine control 3 via the bus line 16.

Claims (8)

  1. Packaging machine (1) with a vacuum pump (10), wherein the vacuum pump (10) comprises an electric motor (11), a pressure generation unit (12), a housing (14) and a controller (15) provided in or at the housing (14) of the vacuum pump (10), characterized in that the vacuum pump (10) comprises at least one sensor (22, 23, 24, 25, 26), and the controller (15) is connected to a machine controller (3) of the packaging machine (1) via a bus line (16) for data transfer, wherein data for diagnosis and/or maintenance are transmittable via the bus line (16) to the machine controller (3), wherein the data include measurement values from the at least one sensor (22, 23, 24, 25, 26).
  2. Packaging machine according to claim 1, characterized in that the controller (15) is formed at least as a start-up control and/or a circuit of the electric motor (11).
  3. Packaging machine according to any one of the preceding claims characterized in that the at least one sensor (22, 23, 24, 25, 26) is a vibration sensor (23), an oil level sensor (22), a temperature sensor (26), a flow sensor (25) and/or an underpressure sensor (24).
  4. Packaging machine according to any one of the preceding claims characterized in that the controller (15) comprises a frequency control for the electric motor (11), wherein the electric motor (11) is formed as a three-phase motor, or a servo control for the electric motor (11), wherein the electric motor (11) is formed as a servomotor.
  5. Packaging machine according to any one of the preceding claims characterized in that the controller (15) is connected to at least one valve (18) to switch the valve (18) with the controller (15).
  6. Packaging machine according to claim 5, characterized in that the valve (18) comprises an electric servomotor (19).
  7. Packaging machine according to claim 5 or 6 characterized in that a shut-off valve, a linear valve or a proportional valve is provided as valve (18) at a suction side (13) of the vacuum pump (10).
  8. Packaging machine according to any one of the preceding claims, characterized in that the vacuum pump (10) is a screw pump or a rotary vane pump.
EP17701691.2A 2016-02-19 2017-01-26 Packaging machine with vacuum pump Active EP3417175B1 (en)

Applications Claiming Priority (2)

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DE102016102954.8A DE102016102954A1 (en) 2016-02-19 2016-02-19 vacuum pump
PCT/EP2017/051594 WO2017140471A1 (en) 2016-02-19 2017-01-26 Vacuum pump

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EP3417175A1 EP3417175A1 (en) 2018-12-26
EP3417175B1 true EP3417175B1 (en) 2021-12-01

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EP (1) EP3417175B1 (en)
CN (1) CN209370101U (en)
DE (1) DE102016102954A1 (en)
ES (1) ES2907576T3 (en)
WO (1) WO2017140471A1 (en)

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
EP3686432B1 (en) * 2020-03-27 2022-06-08 Pfeiffer Vacuum Technology AG Vacuum pump
FR3133650B1 (en) * 2022-03-21 2024-03-01 Pfeiffer Vacuum Vacuum pump

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WO2017140471A1 (en) 2017-08-24
ES2907576T3 (en) 2022-04-25
EP3417175A1 (en) 2018-12-26
CN209370101U (en) 2019-09-10
DE102016102954A1 (en) 2017-08-24

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