EP1327080A2 - Method for filling a printing ink reservoir and device for carrying out said method - Google Patents

Method for filling a printing ink reservoir and device for carrying out said method

Info

Publication number
EP1327080A2
EP1327080A2 EP01986568A EP01986568A EP1327080A2 EP 1327080 A2 EP1327080 A2 EP 1327080A2 EP 01986568 A EP01986568 A EP 01986568A EP 01986568 A EP01986568 A EP 01986568A EP 1327080 A2 EP1327080 A2 EP 1327080A2
Authority
EP
European Patent Office
Prior art keywords
chamber
pressure medium
filling
bellows
filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01986568A
Other languages
German (de)
French (fr)
Other versions
EP1327080B1 (en
Inventor
Andreas Klein
Christian Albrich Von Albrichsfeld
Manfred Rüffer
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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
Priority claimed from DE10139811A external-priority patent/DE10139811A1/en
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1327080A2 publication Critical patent/EP1327080A2/en
Application granted granted Critical
Publication of EP1327080B1 publication Critical patent/EP1327080B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/51—Pressure detection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/515—Position detection for separating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/60—Assembling or methods for making accumulators

Definitions

  • the invention relates to a method for filling a pressure medium accumulator with a housing, the interior of which is divided into two chambers by a metallic bellows serving as a media separation element, the first chamber being filled with a gas and the second chamber being filled with a liquid pressure medium and being in a hydraulic one
  • a bottom valve is provided, the closing body of which can be actuated by the media separating element and which enables the second chamber to be filled with the pressure medium and prevents the second chamber from being completely emptied.
  • Such a pressure medium accumulator is known from international patent application WO 00/31420.
  • the closing body of the bottom valve can be brought into a position by the movement of the bellows, in which it fulfills the function of a hydraulic piston. Since this effectively prevents damage to the bottom valve and unwanted pressure medium leakage, a significant increase in functional reliability is guaranteed.
  • the publication cited does not provide any information as to how the aforementioned chambers can be reliably filled with the appropriate media without the bellows being damaged. It is therefore an object of the present invention to propose a method and a device for filling a pressure medium reservoir of the type mentioned at the outset, which ensure that the bellows is constantly in a pressure-balanced state.
  • This object is achieved according to the invention by combining the following process steps: a) evacuating the second chamber [
  • the second chamber is filled with a defined pressure medium volume that corresponds to the system requirements for a certain temperature, after which the first chamber is filled with a corresponding, previously calculated gas volume in order to compensate for the geometric tolerances.
  • means for evacuating the second chamber, means for filling the second chamber with pressure medium and means for filling the gas into the first chamber (3) are provided.
  • Advantageous developments of the device according to the present invention can be found in subclaims 9 to 13.
  • the pressure medium reservoir to be filled according to the method according to the invention has a housing 1, the interior of which is divided into two pressure chambers or chambers 3, 4 by means of a media separation element 2.
  • the media separation element 2 is preferably formed by a thin-walled metallic bellows, which is connected pressure-tight on the one hand to a cover 8 closing the housing 1 and on the other hand is closed by a plate 9.
  • the interior of the bellows 2 forms the first chamber 3, which can be filled with a gas, which is generally under high pressure, via a filling connection 10 provided in the cover 8.
  • a hydraulic connection 5 is formed, in which a bottom valve 6 is arranged, the closing body 7 of which projects into the second chamber 4.
  • the bottom valve 6 is preferably designed such that on the one hand it enables the second chamber 4 to be filled with a pressurized liquid pressure medium, for example a brake fluid, and on the other hand prevents the second chamber 4 from being completely emptied.
  • a pressurized liquid pressure medium for example a brake fluid
  • a sensor device for sensing the movement of the media separation element 2 is provided in the gas-filled first chamber 3, which is provided with the reference number 12.
  • the sensor device 12 which can be designed, for example, as an inductive displacement sensor, represents an independently manageable assembly that can be inserted into an opening provided in the cover 8.
  • a device is also shown schematically, which is used to fill the previously described pressure medium reservoir with appropriate pressure media.
  • the device shown consists essentially of the following components: a) a first line 13 which is connected on the one hand to the aforementioned first chamber 3 and on the other hand to a compressed gas source, not shown, b) a second line 14 which on the one hand to the aforementioned second Chamber 4 and on the other hand either to a pressure medium source, not shown, or a vacuum source 15 is connected, c) a device 16 for mechanical opening or
  • shut-off valve 17, 18 assigned to the pressure medium source and the vacuum source 15 and inserted in the second line 14.
  • first pressure sensor 19 for monitoring the pressure medium filling pressure
  • second pressure sensor 20 for monitoring the level of the negative pressure applied by the vacuum source 15
  • displacement sensor 21 for monitoring the movement of the device 16 for mechanically opening or keeping the bottom valve 6 open
  • the plate 9 mentioned above is under the action of the compression spring 11 at a first stop (for example on the bottom of the housing 1) and that the bottom valve 6 is closed.
  • a signal value of the displacement sensor 12, which is determined and stored, corresponds to this initial state. The determined signal value is used later in operation to detect defects in the bottom valve 6.
  • the first chamber 3 is acted on with low pressure (for example with compressed air up to 2 bar).
  • the second line 14 is connected to the vacuum source 15 by opening the associated shut-off valve 18 and the second chamber 4 is evacuated.
  • the second chamber 4 is provided with a pressure medium, preferably as a brake fluid, completely filled under low pressure, the bellows 2 being compressed by a small amount.
  • the compression spring 11 or the gas pressure acting in the first chamber 3 then slowly causes the excess pressure medium volume to flow out until the bottom valve 6 closes ,
  • the signal value of the displacement sensor 12 at which the bottom valve 6 closes can be determined and stored.
  • a defined volume of pressure medium is refilled, which corresponds to the system-related minimum requirements and which, for. B. represents the volume value, which ensures a perfect function of the pressure medium storage at the temperature 120 ° C.
  • This causes the bellows 2 to be compressed or the plate 9 closing it to move upward into a defined position, which corresponds to a third signal value from the displacement sensor 12.
  • the signal value is in turn determined and stored.

Abstract

A method for filling a printing ink reservoir with a housing (1) is disclosed, the interior of which is divided into two chambers (3, 4), by means of a metallic bellows (2), serving as a medium separator. The first chamber (3) is filled with a gas and the second chamber (4) is filed with a fluid. A bottom valve (6) is provided n a hydraulic connection (5), the closing body (7) of which may be operated by the medium separator (2), permitting a filling of the second chamber (4) with fluid and preventing a complete emptying of the second chamber (4). According to the invention, a reliable filling of the said chambers (3, 4) with the corresponding medium may be achieved without damaging the bellows (2), by means of a combination of the following method steps: a) evacuation of the second chamber, b) filling the second chamber with printing ink and c) filling the first chamber with the gas.

Description

Verfahren zum Befullen eines Druckmittelspeichers sowie Vorrichtung zur Durchführung des VerfahrensMethod for filling a pressure medium reservoir and device for carrying out the method
Die Erfindung betrifft ein Verfahren zum Befullen eines Druckmittelspeichers mit einem Gehäuse, dessen Innenraum durch einen als Medientrennungselement dienenden metallischen Faltenbalg in zwei Kammern unterteilt ist, wobei die erste Kammer mit einem Gas und die zweite Kammer mit einem flüssigen Druckmittel gefüllt ist und wobei in einem hydraulischen Anschluß ein Bodenventil vorgesehen ist, dessen Schließkörper durch das Medientrennungselement betätigbar ist und das ein Befullen der zweiten Kammer mit dem Druckmittel ermöglicht und ein vollständiges Entleeren der zweiten Kammer verhindert .The invention relates to a method for filling a pressure medium accumulator with a housing, the interior of which is divided into two chambers by a metallic bellows serving as a media separation element, the first chamber being filled with a gas and the second chamber being filled with a liquid pressure medium and being in a hydraulic one A bottom valve is provided, the closing body of which can be actuated by the media separating element and which enables the second chamber to be filled with the pressure medium and prevents the second chamber from being completely emptied.
Ein derartiger Druckmittelspeicher ist aus der internationalen Patentanmeldung WO 00/31420 bekannt. Der Schließkörper des Bodenventils ist durch die Bewegung des Faltenbalgs in eine Lage bringbar, in der er die Funktion eines hydraulischen Kolbens erfüllt . Da dadurch sowohl eine Beschädigung des Bodenventils als auch ein ungewollter Druckmittelaustritt wirksam verhindert werden, wird eine erhebliche Erhöhung der FunktionsSicherheit gewährleistet .Such a pressure medium accumulator is known from international patent application WO 00/31420. The closing body of the bottom valve can be brought into a position by the movement of the bellows, in which it fulfills the function of a hydraulic piston. Since this effectively prevents damage to the bottom valve and unwanted pressure medium leakage, a significant increase in functional reliability is guaranteed.
Der genannten Veröffentlichung sind jedoch keine Hinweise zu entnehmen, wie die vorhin genannten Kammern mit entsprechenden Medien zuverlässig gefüllt werden können, ohne daß der Faltenbalg beschädigt wird. Es ist daher Aufgabe der vorliegenden Erfindung, ein Verfahren sowie eine Vorrichtung zum Befullen eines Druckmittelspeichers der eingangs genannten Gattung vorzuschlagen, die gewährleisten, daß sich der Faltenbalg andauernd in einem druckausgeglichenen Zustand befindet.However, the publication cited does not provide any information as to how the aforementioned chambers can be reliably filled with the appropriate media without the bellows being damaged. It is therefore an object of the present invention to propose a method and a device for filling a pressure medium reservoir of the type mentioned at the outset, which ensure that the bellows is constantly in a pressure-balanced state.
Diese Aufgabe wird erfindungsgemäß durch die Kombination der folgenden Verfahrenschritte gelöst: a) Evakuieren der zweiten Kammer [ | b) Befullen der zweiten Kammer mit Druckmittel, c) Einfüllen des Gases in die erste Kammer.This object is achieved according to the invention by combining the following process steps: a) evacuating the second chamber [| b) filling the second chamber with pressure medium, c) filling the gas into the first chamber.
Zur Konkretisierung des Erfindungsgedankens ist vorgesehen, daß die zweite Kammer mit einem definierten Druckmittelvolumen befüllt wird, das den Systemanforderungen für eine bestimmte Temperatur entspricht, wonach die erste Kammer mit einem entsprechenden, vorher berechneten Gasvolumen gefüllt wird, um die geometrischen Toleranzen zu kompensieren.To concretize the idea of the invention, it is provided that the second chamber is filled with a defined pressure medium volume that corresponds to the system requirements for a certain temperature, after which the first chamber is filled with a corresponding, previously calculated gas volume in order to compensate for the geometric tolerances.
Weitere vorteilhafte Merkmale des erfindungsgemäßen Verfahrens sind in den Unteransprüchen 3 bis 7 aufgeführt .Further advantageous features of the method according to the invention are listed in subclaims 3 to 7.
Bei einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens sind Mittel zum Evakuieren der zweiten Kammer, Mittel zum Befullen der zweiten Kammer mit Druckmittel, sowie Mittel zum Einfüllen des Gases in die erste Kammer (3) vorgesehen. Vorteilhafte Weiterbildungen der Vorrichtung nach der vorliegenden Erfindung sind den Unteransprüchen 9 bis 13 zu entnehmen.In a device for carrying out the method according to the invention, means for evacuating the second chamber, means for filling the second chamber with pressure medium and means for filling the gas into the first chamber (3) are provided. Advantageous developments of the device according to the present invention can be found in subclaims 9 to 13.
Die Erfindung wird in der nachfolgenden Beschreibung unter Bezugnahme auf die beiliegende Zeichnung näher erläutert, deren einzige Figur eine schematische Darstellung der vorhin erwähnten Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens zeigt.The invention is explained in more detail in the following description with reference to the accompanying drawing, the single figure of which shows a schematic representation of the aforementioned device for carrying out the method according to the invention.
Wie der Zeichnung zu entnehmen ist, weist der gemäß dem erfindungsgemäßen Verfahren zu befüllende Druckmittel- Speicher ein Gehäuse 1 auf, dessen Innenraum mittels eines Medientrennungselements 2 in zwei Druckräume bzw. Kammern 3, 4 unterteilt ist. Das Medientrennungselement 2 wird dabei vorzugsweise durch einen dünnwandigen metallischen Faltenbalg gebildet, der einerseits druckdicht mit einem das Gehäuse 1 verschließenden Deckel 8 verbunden ist und andererseits mittels einer Platte 9 verschlossen ist. Der Innenraum des Faltenbalgs 2 bildet die erste Kammer 3, die über einen im Deckel 8 vorgesehenen Füllanschluß 10 mit einem in der Regel unter hohem Druck stehenden Gas befüllt werden kann. Im unteren Teil des Gehäuses 1 ist ein hydraulischer Anschluß 5 ausgebildet, in dem ein Bodenventil 6 angeordnet ist, dessen Schließkörper 7 in die zweite Kammer 4 hineinragt. Das Bodenventil 6 ist dabei vorzugsweise derart ausgelegt, daß es einerseits ein Befullen der zweiten Kammer 4 mit einem unter Druck stehenden flüssigen Druckmittel, beispielsweise einer Bremsflüssigkeit, ermöglicht und andererseits ein vollständiges Entleeren der zweiten Kammer 4 verhindert. Außerdem befindet sich in der ersten Kammer 3 eine Druckfeder 11, die zwischen dem Deckel 8 und der vorhin erwähnten Platte 9 eingespannt ist und somit den Faltenbalg 2 in Richtung auf das Bodenventil 6 zu vorspannt. Dadurch wird gewährleistet, daß der in der zweiten Kammer 4 herrschende hydraulische Druck immer höher ist als der in der ersten Kammer 3 herrschende Gasdruck.As can be seen in the drawing, the pressure medium reservoir to be filled according to the method according to the invention has a housing 1, the interior of which is divided into two pressure chambers or chambers 3, 4 by means of a media separation element 2. The media separation element 2 is preferably formed by a thin-walled metallic bellows, which is connected pressure-tight on the one hand to a cover 8 closing the housing 1 and on the other hand is closed by a plate 9. The interior of the bellows 2 forms the first chamber 3, which can be filled with a gas, which is generally under high pressure, via a filling connection 10 provided in the cover 8. In the lower part of the housing 1, a hydraulic connection 5 is formed, in which a bottom valve 6 is arranged, the closing body 7 of which projects into the second chamber 4. The bottom valve 6 is preferably designed such that on the one hand it enables the second chamber 4 to be filled with a pressurized liquid pressure medium, for example a brake fluid, and on the other hand prevents the second chamber 4 from being completely emptied. In addition, there is a compression spring 11 in the first chamber 3, which between the cover 8 and the plate 9 mentioned above is clamped and thus the bellows 2 is biased towards the bottom valve 6. This ensures that the hydraulic pressure prevailing in the second chamber 4 is always higher than the gas pressure prevailing in the first chamber 3.
Außerdem ist in der mit Gas gefüllten ersten Kammer 3 eine Sensoreinrichtung zum Sensieren der Bewegung des Medientrennungselements 2 vorgesehen, die mit dem Bezugszeichen 12 versehen ist. Die Sensoreinrichtung 12, die beispielsweise als ein induktiver Wegsensor ausgebildet sein kann, stellt eine selbständig handhabbare Baugruppe dar, die in eine im Deckel 8 vorgesehene Öffnung einsetzbar ist.In addition, a sensor device for sensing the movement of the media separation element 2 is provided in the gas-filled first chamber 3, which is provided with the reference number 12. The sensor device 12, which can be designed, for example, as an inductive displacement sensor, represents an independently manageable assembly that can be inserted into an opening provided in the cover 8.
In der Zeichnung ist weiterhin schematisch eine Vorrichtung dargestellt, die dem Befullen des vorhin beschriebenen Druckmittelspeichers mit entsprechenden Druckmedien dient. Die gezeigte Vorrichtung besteht im wesentlichen aus folgenden Bestandteilen: a) einer ersten Leitung 13, die einerseits an die vorhin erwähnte erste Kammer 3 und andererseits an eine nicht dargestellte Druckgasquelle angeschlossen wird, b) einer zweiten Leitung 14, die einerseits an die vorhin erwähnte zweite Kammer 4 und andererseits entweder an eine nicht dargestellte Druckmittelquelle oder eine Unterdruckquelle 15 angeschlossen wird, c) einer Einrichtung 16 zum mechanischen Öffnen bzw.In the drawing, a device is also shown schematically, which is used to fill the previously described pressure medium reservoir with appropriate pressure media. The device shown consists essentially of the following components: a) a first line 13 which is connected on the one hand to the aforementioned first chamber 3 and on the other hand to a compressed gas source, not shown, b) a second line 14 which on the one hand to the aforementioned second Chamber 4 and on the other hand either to a pressure medium source, not shown, or a vacuum source 15 is connected, c) a device 16 for mechanical opening or
Offenhalten des Bodenventils 6, die in den vorhin erwähnten hydraulischen Anschluß 5 einführbar ist, und d) jeweils einem der Druckmittelquelle sowie der Unterdruckquelle 15 zugeordneten, in der zweiten Leitung 14 eingefügten Absperrventil 17, 18.Keep open the bottom valve 6, which can be inserted into the hydraulic connection 5 mentioned above, and d) one shut-off valve 17, 18 assigned to the pressure medium source and the vacuum source 15 and inserted in the second line 14.
Dabei ist es sinnvoll, einen ersten Drucksensor 19 zur Überwachung des Druckmittelfülldrucks, einen zweiten Drucksensor 20 zur Überwachung des Niveaus des von der Unterdruckquelle 15 aufgebrachten Unterdrucks sowie einen Wegsensor 21 zur Überwachung der Bewegung der Einrichtung 16 zum mechanischen Öffnen bzw. Offenhalten des Bodenventils 6 vorzusehen.It makes sense to provide a first pressure sensor 19 for monitoring the pressure medium filling pressure, a second pressure sensor 20 for monitoring the level of the negative pressure applied by the vacuum source 15, and a displacement sensor 21 for monitoring the movement of the device 16 for mechanically opening or keeping the bottom valve 6 open ,
Vor dem Beginn des nachfolgend erläuterten Füllvorgangs wird angenommen, daß sich die vorhin erwähnte Platte 9 unter der Wirkung der Druckfeder 11 an einem ersten Anschlag (beispielsweise am Boden des Gehäuses 1) befindet und daß das Bodenventil 6 geschlossen ist. Diesem Ausgangszustand entspricht ein Signalwert des Wegsensors 12, der ermittelt und abgelegt wird. Der ermittelte Signalwert wird später im Betrieb benutzt, um Defekte am Bodenventil 6 zu erkennen. Um die gleiche Wirkung bei einer Ausführung ohne die vorhin genannte Druckfeder 11 zu erzielen wird die erste Kammer 3 mit niedrigem Druck (z. B. mit Preßluft bis 2 bar) beaufschlagt.Before the start of the filling process explained below, it is assumed that the plate 9 mentioned above is under the action of the compression spring 11 at a first stop (for example on the bottom of the housing 1) and that the bottom valve 6 is closed. A signal value of the displacement sensor 12, which is determined and stored, corresponds to this initial state. The determined signal value is used later in operation to detect defects in the bottom valve 6. In order to achieve the same effect in an embodiment without the previously mentioned compression spring 11, the first chamber 3 is acted on with low pressure (for example with compressed air up to 2 bar).
Nachdem die Einrichtung 16, die beispielsweise als ein metallischer Stift ausgeführt sein kann, das Bodenventil 6 geöffnet hatte, wird die zweite Leitung 14 durch Öffnen des zugeordneten Absperrventils 18 mit der Unterdruckquelle 15 verbunden und die zweite Kammer 4 evakuiert. Nach dem Evakuieren wird die zweite Kammer 4 mit einem dafür vorgesehenen Druckmittel, Vorzugs- weise einer Bremsflüssigkeit, unter niedrigem Druck vollständig befüllt, wobei der Faltenbalg 2 um einen geringen Betrag zusammengedrückt wird. Anschließend bewirkt die Druckfeder 11 bzw. der in der ersten Kammer 3 wirkende Gasdruck ein langsames Ausströmen des überschüssigen Druckmittelvolumens bis zum Schließen des Bodenventils 6. Da der Schließkörper 7 des Bodenventils, die den Faltenbalg 2 verschließende Platte 9 und der Wegsensor 12 miteinender in Kontakt stehen, kann der Signalwert des Wegsensors 12, bei dem das Bodenventil 6 schließt, ermittelt und abgelegt werden.After the device 16, which can be designed as a metallic pin, for example, has opened the bottom valve 6, the second line 14 is connected to the vacuum source 15 by opening the associated shut-off valve 18 and the second chamber 4 is evacuated. After the evacuation, the second chamber 4 is provided with a pressure medium, preferably as a brake fluid, completely filled under low pressure, the bellows 2 being compressed by a small amount. The compression spring 11 or the gas pressure acting in the first chamber 3 then slowly causes the excess pressure medium volume to flow out until the bottom valve 6 closes , The signal value of the displacement sensor 12 at which the bottom valve 6 closes can be determined and stored.
Nun wird ein definiertes Druckmittelvolumen nachgefüllt, das den systembedingten Mindestanforderungen entspricht und das z. B. den Volumenwert darstellt, der bei der Temperatur 120 °C eine einwandfreie Funktion des Druckmittelspeichers gewährleistet. Dadurch erfolgt ein Zusammendrücken des Faltenbalgs 2 bzw. eine Bewegung der ihn verschließenden Platte 9 nach oben in eine definerte Position, der ein dritter Signalwert des Wegsensors 12 entspricht. Der Signalwert wird wiederum ermittelt und abgespeichert.Now a defined volume of pressure medium is refilled, which corresponds to the system-related minimum requirements and which, for. B. represents the volume value, which ensures a perfect function of the pressure medium storage at the temperature 120 ° C. This causes the bellows 2 to be compressed or the plate 9 closing it to move upward into a defined position, which corresponds to a third signal value from the displacement sensor 12. The signal value is in turn determined and stored.
Danach wird Druckmittel so lange nachgefüllt, bis die Platte 9 einen nicht gezeigten, beispielsweise in der ersten Kammer 3 angeordneten mechanischen Anschlag erreicht. Dieser oberen Position des (zusammengedrückten) Faltenbalges 2 entspricht wieder ein Signalwert des Wegsensors 12, der ermittelt und abgelegt wird. Der erwähnte Signalwert ist besonders dafür geeignet, ein Zerstören des Faltenbalges 2 zu verhindern. Nach dem Erfassen des der oberen Position entsprechenden Signalwertes wird das nachgefüllte Druckmittelvolumen wieder so lange entnommen, bis die durch das Nachfüllen des definierten Druckmittelvolumens eingestellte Position erreicht ist. In dieser Position erfolgt über die erste Leitung 13 ein Befullen der ersten Kammer 3 mit geeignetem Gas, wonach der vorhin erwähnte Füllanschluß 10 verschlossen wird. Danach wird das im Speicher verbliebene Druckmittel so lange entnommen, bis das Bodenventil 6 schließt. Damit ist der Füllvorgang beendet und der Speicher mit den ermittelten Signalwerten kann ausgeliefert werden. Thereafter, pressure medium is refilled until the plate 9 reaches a mechanical stop, not shown, for example arranged in the first chamber 3. This upper position of the (compressed) bellows 2 again corresponds to a signal value of the displacement sensor 12, which is determined and stored. The signal value mentioned is particularly suitable for preventing the bellows 2 from being destroyed. After the signal value corresponding to the upper position has been recorded, the refilled pressure medium volume is withdrawn until the position set by refilling the defined pressure medium volume is reached. In this position, the first chamber 3 is filled with a suitable gas via the first line 13, after which the filling connection 10 mentioned above is closed. Then the pressure medium remaining in the reservoir is removed until the bottom valve 6 closes. This completes the filling process and the memory with the determined signal values can be delivered.

Claims

Patentansprüche claims
1. Verfahren zum Befullen eines Druckmittelspeichers mit einem Gehäuse (1) , dessen Innenraum durch einen als Medientrennungselement dienenden metallischen Faltenbalg (2) in zwei Kammern (3,4) unterteilt ist, wobei die erste Kammer (3) mit einem Gas und die zweite Kammer (4) mit einem flüssigen Druckmittel gefüllt ist und wobei in einem hydraulischen Anschluß (5) ein Bodenventil (6) vorgesehen ist, dessen Schließkδrper1. A method for filling a pressure medium reservoir with a housing (1), the interior of which is divided into two chambers (3, 4) by a metallic bellows (2) serving as a media separation element, the first chamber (3) containing a gas and the second Chamber (4) is filled with a liquid pressure medium and a bottom valve (6) is provided in a hydraulic connection (5), the closing body of which
(7) durch das Medientrennungselement (2) betätigbar ist und das ein Befullen der zweiten Kammer (4) mit dem Druckmittel ermöglicht und ein vollständiges Entleeren der zweiten Kammer (4) verhindert, gekennzeichnet durch die folgenden Verfahrensschritte : a) Evakuieren der zweiten Kammer (4) b) Befullen der zweiten Kammer (4) mit Druckmittel, c) Einfüllen des Gases in die erste Kammer (3) .(7) can be actuated by the media separation element (2) and enables the second chamber (4) to be filled with the pressure medium and prevents the second chamber (4) from being completely emptied, characterized by the following process steps: a) evacuating the second chamber ( 4) b) filling the second chamber (4) with pressure medium, c) filling the gas into the first chamber (3).
2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß die zweite Kammer (4) mit einem definierten Druckmittelvolumen befüllt wird, das den Systemanforderungen für eine bestimmte Temperatur entspricht, wonach die erste Kammer (3) mit einem entsprechenden, vorher berechneten Gasvolumen gefüllt wird, um die geometrischen Toleranzen zu kompensieren.2. The method according to claim 1, characterized in that the second chamber (4) is filled with a defined pressure medium volume that corresponds to the system requirements for a certain temperature, after which the first chamber (3) is filled with a corresponding, previously calculated gas volume to compensate for the geometrical tolerances.
3. Verfahren nach Anspruch 2 dadurch gekennzeichnet, daß beim Befullen der zweiten Kammer (4) mit dem definierten Druckmittelvolumen der vom Faltenbalg (2) zurückgelegte Weg sensiert wird. 3. The method according to claim 2, characterized in that the path covered by the bellows (2) is sensed when filling the second chamber (4) with the defined pressure medium volume.
. Verfahren nach Anspruch 2 oder 3 dadurch gekennzeichnet, daß bei gleichzeitiger Sensierung des, A method according to claim 2 or 3, characterized in that with simultaneous sensing of the
Zustands des Bodenventils (6) aus der zweiten KammerState of the bottom valve (6) from the second chamber
(4) Druckmittel so lange dosiert entnommen wird, bis der Schließzustand des Bodenventils (6) erreicht ist.(4) The pressure medium is dosed until the bottom valve (6) is closed.
5. Verfahren nach einem der Ansprüche 1 bis 4 dadurch gekennzeichnet, daß die zweite Kammer (4) mit Druckmittel so lange gefüllt wird, bis ein Anschlag für den Faltenbalg (2) erreicht ist, wobei der vom Faltenbalg (2) zurückgelegte Weg sensiert wird.5. The method according to any one of claims 1 to 4, characterized in that the second chamber (4) is filled with pressure medium until a stop for the bellows (2) is reached, the path covered by the bellows (2) being sensed ,
6. Verfahren nach einem der Ansprüche 1 bis 5 dadurch gekennzeichnet, daß vor dem Befullen der zweiten Kammer (4) mit Druckmittel der Faltenbalg (2) zur Anlage an einem zweiten Anschlag gebracht wird, wobei der vom Faltenbalg (2) zurückgelegte Weg sensiert wird.6. The method according to any one of claims 1 to 5, characterized in that prior to filling the second chamber (4) with pressure medium the bellows (2) is brought into contact with a second stop, the path covered by the bellows (2) being sensed ,
7. Verfahren nach Anspruch 6 dadurch gekennzeichnet, daß der Faltenbalg (2) zur Anlage am zweiten Anschlag durch die Wirkung eines pneumatischen Druckes gebracht wird.7. The method according to claim 6, characterized in that the bellows (2) is brought into contact with the second stop by the action of a pneumatic pressure.
8. Vorrichtung zum zum Befullen eines Druckmittelspeichers mit einem Gehäuse (1) , dessen Innenraum durch einen als Medientrennungselement dienenden metallischen Faltenbalg in zwei Kammern (3,4) unterteilt ist, wobei die erste Kammer (3) mit einem Gas und die zweite Kammer (4) mit einem flüssigen Druckmittel gefüllt ist und wobei in einem hydraulischen Anschluß (5) ein8. Device for filling a pressure medium reservoir with a housing (1), the interior of which is divided into two chambers (3, 4) by a metallic bellows serving as a media separation element, the first chamber (3) containing a gas and the second chamber ( 4) is filled with a liquid pressure medium and in a hydraulic connection (5)
Bodenventil (6) vorgesehen ist, dessen Schließkörper (7) durch das Medientrennungselement (2) betätigbar ist und das ein Befullen der zweiten Kammer (4) mit dem Druckmittel ermöglicht und ein vollständiges Entleeren der zweiten Kammer (4) verhindert, dadurch gekennzeichnet, daß Mittel zum Evakuieren der zweiten Kammer (4) , Mittel zumFloor valve (6) is provided, the closing body (7) of which can be actuated by the media separation element (2) and which fills the second chamber (4) with the Pressure medium allows and a complete emptying of the second chamber (4) prevented, characterized in that means for evacuating the second chamber (4), means for
Befullen der zweiten Kammer (4) mit Druckmittel, sowie Mittel zum Einfüllen des Gases in die erste Kammer (3) vorgesehen sind.Filling the second chamber (4) with pressure medium, and means for filling the gas into the first chamber (3) are provided.
9. Vorrichtung nach Anspruch 8 dadurch gekennzeichnet, daß sie eine an die erste Kammer (3) anschließbare, der Gaszufuhr dienende erste Leitung (13) sowie eine an die zweite Kammer (4) anschließbare zweite Leitung (14) aufweist, die wahlweise mit einer Druckmittelquelle oder einer Unterdruckquelle (15) verbindbar ist.9. The device according to claim 8, characterized in that it has a connectable to the first chamber (3), the gas supply serving first line (13) and a second chamber (4) connectable second line (14), optionally with a Pressure medium source or a vacuum source (15) can be connected.
10. Vorrichtung nach Anspruch 8 oder 9 dadurch gekennzeichnet, daß sie mit einer Einrichtung (16) zum Öffnen bzw. Offenhalten des Bodenventils (6) versehen ist.10. The device according to claim 8 or 9, characterized in that it is provided with a device (16) for opening or holding the bottom valve (6).
11. Vorrichtung nach einem der Ansprüche 8. bis 10 dadurch gekennzeichnet, daß ein Drucksensor (19) zur Ermittlung des in der zweiten Leitung (14) beim Befullen der zweiten Kammer (4) herrschenden Druckmittel-Fülldruckes vorgesehen ist.11. Device according to one of claims 8 to 10, characterized in that a pressure sensor (19) for determining the pressure medium filling pressure prevailing in the second line (14) when filling the second chamber (4) is provided.
12. Vorrichtung nach einem der Ansprüche 8 bis 11 dadurch gekennzeichnet, daß ein Unterdrucksensor (20) zur Ermittlung des von der Unterdruckquelle (15) beim Evakuieren der zweiten Kammer (4) aufgebrachten Unterdruckes vorgesehen ist. 12. Device according to one of claims 8 to 11, characterized in that a negative pressure sensor (20) is provided for determining the negative pressure applied by the negative pressure source (15) when the second chamber (4) is evacuated.
3. Vorrichtung nach einem der Ansprüche 10 bis 12 dadurch gekennzeichnet, daß ein Wegsensor (21) zur Ermittlung der Position des Schließkörpers (7) des Bodenventils (6) vorgesehen ist. 3. Device according to one of claims 10 to 12, characterized in that a displacement sensor (21) for determining the position of the closing body (7) of the bottom valve (6) is provided.
EP01986568A 2000-10-11 2001-10-09 Method for filling a hydraulic accumulator and device for carrying out said method Expired - Lifetime EP1327080B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10050505 2000-10-11
DE10050505 2000-10-11
DE10139811A DE10139811A1 (en) 2000-10-11 2001-08-14 Method for filling a pressure medium reservoir and device for carrying out the method
DE10139811 2001-08-14
PCT/EP2001/011679 WO2002031362A2 (en) 2000-10-11 2001-10-09 Method for filling a printing ink reservoir and device for carrying out said method

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EP1327080A2 true EP1327080A2 (en) 2003-07-16
EP1327080B1 EP1327080B1 (en) 2006-06-21

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EP (1) EP1327080B1 (en)
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WO2002031362A2 (en) 2002-04-18
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JP2004511729A (en) 2004-04-15
EP1327080B1 (en) 2006-06-21
JP4213464B2 (en) 2009-01-21
WO2002031362A3 (en) 2003-01-30
US20040020552A1 (en) 2004-02-05

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