EP1272764A2 - Hydraulic fluid accumulator - Google Patents

Hydraulic fluid accumulator

Info

Publication number
EP1272764A2
EP1272764A2 EP01944993A EP01944993A EP1272764A2 EP 1272764 A2 EP1272764 A2 EP 1272764A2 EP 01944993 A EP01944993 A EP 01944993A EP 01944993 A EP01944993 A EP 01944993A EP 1272764 A2 EP1272764 A2 EP 1272764A2
Authority
EP
European Patent Office
Prior art keywords
chamber
separation element
media separation
housing
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01944993A
Other languages
German (de)
French (fr)
Inventor
Dieter Dinkel
Axel Hinz
Hans-Dieter Reinartz
Manfred Rüffer
Günther VOGEL
Uwe Greiff
René LENZ
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 DE10101856A external-priority patent/DE10101856A1/en
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1272764A2 publication Critical patent/EP1272764A2/en
Withdrawn legal-status Critical Current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
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • 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
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder
    • 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
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • 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
    • 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
    • F15B2201/415—Gas ports

Definitions

  • the invention relates to a pressure medium accumulator with a housing, the interior of which is divided into three chambers, the first chamber being filled with a gas and being separated by a first media separation element from the second chamber which is filled with a liquid and by a second media separation element is separated from the third chamber, which is also filled with a liquid and is connected to a hydraulic connection
  • Such a pressure medium reservoir is known from DE-OS 29 10 554.
  • the first media separation element is formed by a metallic bellows, while the second media separation element is formed by an elastic partition.
  • This object is achieved in that the second media separation element is formed by a metallic piston which delimits a ventable space in the housing.
  • FIG. 1 shows a first embodiment of the pressure medium reservoir according to the invention in axial section
  • Fig. 2 shows a second embodiment of the pressure medium reservoir according to the invention in a representation corresponding to FIG. 1.
  • the first embodiment of the pressure medium reservoir according to the invention shown in FIG. 1 has a housing 1, the interior of which is divided into three pressure spaces or chambers 2, 3, 4.
  • the first chamber 2 is formed by the interior of a first media separation element 6, which preferably consists of a thin-walled metallic bellows, which is connected pressure-tight to the housing 1 on the one hand and is closed by a plate 13 on the other hand.
  • the first chamber 2 can a filling connection (not shown) provided in the housing 1 can be filled with a gas which is generally under high pressure.
  • the third chamber 4 is formed, in which a hydraulic connection 5 opens.
  • a radial recess formed on the circumference of the piston 8 delimits with the wall of the housing 1 a space 9 which is connected to the atmosphere via bores 14.
  • the space 9 is sealed off from the second chamber 3 and the third chamber 4 by means of an elastic sealing ring 11 and 12, respectively. If brake fluid is used to fill the second chamber 3, it is conceivable to use the space 9 mentioned above with a brake fluid container connect to.
  • a particularly viscous liquid can also be used to fill the second chamber 3, which, however, does not then enter the brake fluid container, but e.g. B. is derived into the atmosphere.
  • the first chamber 20 is not, as described above, formed by the interior of the first media separation element 60, but is delimited between the wall of the housing 10 and the first media separation element or bellows 60.
  • the interior of the bellows 60 forms the second chamber 30, into which a cylindrical guide part 15 assigned to the housing 10 projects, into which the second media separation element 70 or the piston 80 is guided and the third chamber 40 is formed.
  • the space 90 between the piston 80 and the cylindrical guide part 15 mentioned in connection with FIG. 1 is made similar to the second chamber 30 and the third chamber 40 by means of each, similar to the embodiment shown in FIG of a seal 110, 120 sealed and connected to the atmosphere via a schematically indicated channel 18.
  • a hydraulic connection 19 is formed in the piston 80 between the second and the third chamber 30, 40, in which a check valve 17 closing towards the third chamber 40 is inserted.
  • the check valve 17 serves to fill or refill the separation liquid into the second chamber 30.

Abstract

The invention relates to a hydraulic fluid accumulator comprising a housing (1), whose interior is subdivided into three chambers (2, 3, 4), whereby the first chamber (2) is filled with a gas and separated from the second chamber (3) by a first media separation element (6). Said second chamber is filled with a liquid and is separated from the third chamber (4), which is also filled with a liquid and is connected to a hydraulic line (5), by a second media separation element (7). To guarantee an effective separation of the media within the hydraulic fluid accumulator and thus a significant increase in its functional safety, the invention is characterized in that the second media separation element (7) is embodied by a metal piston (8, 80) which delimits a space that can be deaerated (9, 90) in the housing (1).

Description

Druckmittelspeicher Accumulator
Die Erfindung betrifft einen Druckmittelspeicher mit einem Gehäuse, dessen Innenraum in drei Kammern unterteilt ist, wobei die erste Kammer mit einem Gas gefüllt ist und durch ein erstes Medientrennungselement von der zweiten Kammer getrennt ist, die mit einer Flüssigkeit gefüllt ist und die durch ein zweites Medientrennungselement von der ebenso mit einer Flüssigkeit gefüllten dritten Kammer getrennt ist, die mit einem hydraulischen Anschluß in Verbindung stehtThe invention relates to a pressure medium accumulator with a housing, the interior of which is divided into three chambers, the first chamber being filled with a gas and being separated by a first media separation element from the second chamber which is filled with a liquid and by a second media separation element is separated from the third chamber, which is also filled with a liquid and is connected to a hydraulic connection
Ein derartiger Druckmittelspeicher ist aus der DE - OS 29 10 554 bekannt. Das erste Medientrennungselement ist bei dem vorbekannten Druckmittelspeicher durch einen metallischen Faltenbalg gebildet, während das zweite Medientrennungselement durch eine elastische Trennwand gebildet ist.Such a pressure medium reservoir is known from DE-OS 29 10 554. In the previously known pressure medium accumulator, the first media separation element is formed by a metallic bellows, while the second media separation element is formed by an elastic partition.
Weniger vorteilhaft ist bei dem vorbekannten Druckmittelspeicher anzusehen, daß keine wirksame Medientrennung erreicht werden kann. Untersuchungen haben gezeigt, daß bei Undichtigkeiten am üblicherweise völlig gasdichten Faltenbalg das Gas aus der ersten Kammer in die zweite Kammer gelangen und von dort durch das Material der elastischen Trennwand in die dritte Kammer hinein diffundieren kann. Dies führt wiederum zum massiven Gaseintrag in die mit dem Druckmittelspeicher ausgestatteten Hydraulikanlage, der nicht rechtzeitig erkannt werden kann.It is to be regarded as less advantageous in the case of the previously known pressure medium accumulator that no effective media separation can be achieved. Studies have shown that in the event of leaks in the usually completely gas-tight bellows, the gas can pass from the first chamber into the second chamber and from there can diffuse through the material of the elastic partition into the third chamber. This in turn leads to massive gas entry into the hydraulic system equipped with the pressure medium accumulator, which cannot be recognized in time.
Es ist daher Aufgabe der vorliegenden Erfindung einen Druckmittelspeicher der eingangs genannten Gattung dahingehend zu verbessern, daß kein Gaseintrag in die nachgeschaltete Hydraulikanlage stattfinden kann und somit eine erhebliche Erhöhung der Funktionssicherheit gewährleistet wird. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das zweite Medientrennungselement durch einen metallischen Kolben gebildet ist, der im Gehäuse einen entlüftbaren Raum begrenzt.It is therefore an object of the present invention to improve a pressure medium accumulator of the type mentioned at the outset in such a way that no gas can be introduced into the downstream hydraulic system and a considerable increase in functional reliability is thus ensured. This object is achieved in that the second media separation element is formed by a metallic piston which delimits a ventable space in the housing.
Äußerst kompakte Bauformen des Erfindungsgegenstandes ergeben sich dadurch, daß der Kolben im Gehäuse abgedichtet geführt ist und das erste Medientrennungselement radial umgreift bzw. daß die erste Kammer zwischen der Wandung des Gehäuses und dem ersten Medientrennungselement ausgebildet ist und daß sowohl die zweite als auch die dritte Kammer innerhalb des ersten Medientrennungselementes ausgebildet sind.Extremely compact designs of the subject of the invention result from the fact that the piston is guided in a sealed manner in the housing and surrounds the first media separation element radially or that the first chamber is formed between the wall of the housing and the first media separation element and that both the second and the third chamber are formed within the first media separation element.
Vorteilhafte Weiterbildungen des Erfindungsgegenstandes sind in den Unteransprüchen 2 und 5 bis 8 aufgeführt.Advantageous developments of the subject matter of the invention are listed in subclaims 2 and 5 to 8.
Die Erfindung wird in der nachfolgenden Beschreibung von zwei Ausführungsbeispielen unter Bezugnahme auf die beiliegende Zeichnung näher erläutert. In der Zeichnung zeigt:The invention is explained in more detail in the following description of two exemplary embodiments with reference to the accompanying drawing. The drawing shows:
Fig. 1 eine erste Ausführung des erfindungsgemäßen Druckmittelspeichers im Axialschnitt,1 shows a first embodiment of the pressure medium reservoir according to the invention in axial section,
Fig. 2 eine zweite Ausführung des erfindungsgemäßen Druckmittelspeichers in einer der Fig. 1 entsprechenden Darstellung.Fig. 2 shows a second embodiment of the pressure medium reservoir according to the invention in a representation corresponding to FIG. 1.
Die in Fig. 1 dargestellte erste Ausführung des erfindungsgemäßen Druckmittelspeichers weist ein Gehäuse 1 auf, dessen Innenraum in drei Druckräume bzw. Kammern 2, 3, 4 unterteilt ist. Die erste Kammer 2 wird durch den Innenraum eines ersten Medientrennungselements 6 gebildet, das vorzugsweise aus einem dünnwandigen metallischen Faltenbalg besteht, der einerseits druckdicht mit dem Gehäuse 1 verbunden ist und andererseits mittels einer Platte 13 verschlossen ist. Die erste Kammer 2 kann über einen im Gehäuse 1 vorgesehenen, nicht gezeigten Füllanschluß mit einem in der Regel unter hohem Druck stehenden Gas befüllt werden. Ein im Gehäuse 1 verschiebbar geführter, vorzusweise aus Metall bestehender Kolben 8, der den vorhin erwähnten Faltenbalg 6 radial umgreift, begrenzt mit dem Faltenbalg 6 die zweite Kammer 3 und bildet ein zweites Medientrennungselement, das mit dem Bezugszeichen 7 versehen ist. Im unteren Teil des Gehäuses 1 ist die dritte Kammer 4 ausgebildet, in der ein hydraulischer Anschluß 5 mündet. Eine am Umfang des Kolbens 8 ausgebildete radiale Ausnehmung begrenzt mit der Wandung des Gehäuses 1 einen Raum 9, der über Bohrungen 14 mit der Atmosphäre in Verbindung steht. Eine Abdichtung des Raumes 9 gegenüber der zweiten Kammer 3 bzw. der dritten Kammer 4 erfolgt mittels je eines elastischen Dichtrings 11 bzw. 12. Wird zur Füllung der zweiten Kammer 3 Bremsflüssigkeit verwendet, so ist es denkbar, den vorhin erwähnten Raum 9 mit einem Bremsflüssigkeitsbehälter zu verbinden. Um die natürliche Leckage an dem erstgenannten Dichtring 11 zu verringern, kann zur Füllung der zweiten Kammer 3 auch eine besonders zähe Flüssigkeit verwendet werden, die dann allerdings nicht in den Bremsflüssigkeitsbehälter, sondern z. B. in die Atmosphäre abgeleitet wird.The first embodiment of the pressure medium reservoir according to the invention shown in FIG. 1 has a housing 1, the interior of which is divided into three pressure spaces or chambers 2, 3, 4. The first chamber 2 is formed by the interior of a first media separation element 6, which preferably consists of a thin-walled metallic bellows, which is connected pressure-tight to the housing 1 on the one hand and is closed by a plate 13 on the other hand. The first chamber 2 can a filling connection (not shown) provided in the housing 1 can be filled with a gas which is generally under high pressure. A piston 8, which is displaceably guided in the housing 1 and preferably consists of metal and radially encompasses the bellows 6 mentioned above, delimits the second chamber 3 with the bellows 6 and forms a second media separation element which is provided with the reference number 7. In the lower part of the housing 1, the third chamber 4 is formed, in which a hydraulic connection 5 opens. A radial recess formed on the circumference of the piston 8 delimits with the wall of the housing 1 a space 9 which is connected to the atmosphere via bores 14. The space 9 is sealed off from the second chamber 3 and the third chamber 4 by means of an elastic sealing ring 11 and 12, respectively. If brake fluid is used to fill the second chamber 3, it is conceivable to use the space 9 mentioned above with a brake fluid container connect to. In order to reduce the natural leakage on the first-mentioned sealing ring 11, a particularly viscous liquid can also be used to fill the second chamber 3, which, however, does not then enter the brake fluid container, but e.g. B. is derived into the atmosphere.
Bei der in Fig. 2 dargestellten zweiten Ausführung des Erfindungsgegenstandes ist die erste Kammer 20 nicht, wie oben beschrieben, durch den Innenraum des ersten Medientrennungselements 60 gebildet, sondern zwischen der Wandung des Gehäuses 10 und dem ersten Medientrennungselement bzw. Faltenbalg 60 begrenzt. Der Innenraum des Faltenbalgs 60 bildet die zweite Kammer 30, in die ein dem Gehäuse 10 zugeordnetes zylindrisches Führungsteil 15 hinein ragt, in dem das zweite Medientrennungselement 70 bzw. der Kolben 80 geführt wird und die dritte Kammer 40 ausgebildet ist. Der im Zusammenhang mit Fig. 1 erwähnte, zwischen dem Kolben 80 und dem zylindrischen Führungsteil 15 begrenzte Raum 90 wird ähnlich wie bei der in Fig. 1 gezeigten Ausführung gegenüber der zweiten Kammer 30 bzw. der dritten Kammer 40 mittels je eines Dichtnnges 110, 120 abgedichtet und über einen schematisch angedeuteten Kanal 18 mit der Atmosphäre verbunden. Außerdem ist im Kolben 80 eine hydraulische Verbindung 19 zwischen der zweiten und der dritten Kammer 30, 40 ausgebildet, in der ein zur dritten Kammer 40 hin schließendes Ruckschlagventil 17 eingefugt ist. Das Ruckschlagventil 17 dient zur Befullung bzw. zum Nachfüllen von Trennflussigkeit in die zweite Kammer 30. In the second embodiment of the subject matter shown in FIG. 2, the first chamber 20 is not, as described above, formed by the interior of the first media separation element 60, but is delimited between the wall of the housing 10 and the first media separation element or bellows 60. The interior of the bellows 60 forms the second chamber 30, into which a cylindrical guide part 15 assigned to the housing 10 projects, into which the second media separation element 70 or the piston 80 is guided and the third chamber 40 is formed. The space 90 between the piston 80 and the cylindrical guide part 15 mentioned in connection with FIG. 1 is made similar to the second chamber 30 and the third chamber 40 by means of each, similar to the embodiment shown in FIG of a seal 110, 120 sealed and connected to the atmosphere via a schematically indicated channel 18. In addition, a hydraulic connection 19 is formed in the piston 80 between the second and the third chamber 30, 40, in which a check valve 17 closing towards the third chamber 40 is inserted. The check valve 17 serves to fill or refill the separation liquid into the second chamber 30.

Claims

Patentansprüche claims
1. Druckmittelspeicher mit einem Gehäuse (1,10), dessen Innenraum in drei Kammern (2,3,4,20,30,40) unterteilt ist, wobei die erste Kammer (2,20) mit einem Gas gefüllt ist und durch ein erstes Medientrennungselement (6,60) von der zweiten Kammer (3,30) getrennt ist, die mit einer Flüssigkeit gefüllt ist und die durch ein zweites Medientrennungselement (7,70) von der ebenso mit einer Flüssigkeit gefüllten dritten Kammer (4,40) getrennt ist, die mit einem hydraulischen Anschluß (5-50) in Verbindung steht, dadurch gekennzeichnet, daß das zweite Medientrennungselement (7,70) durch einen metallischen Kolben (8,80) gebildet ist, der im Gehäuse (1,10) einen entlüftbaren Raum (9,90) begrenzt.1. Pressure medium accumulator with a housing (1,10), the interior of which is divided into three chambers (2,3,4,20,30,40), the first chamber (2,20) being filled with a gas and through a first media separation element (6,60) is separated from the second chamber (3,30) which is filled with a liquid and which is separated from the third chamber (4,40) which is also filled with liquid by a second media separation element (7,70) is separated, which is connected to a hydraulic connection (5-50), characterized in that the second media separation element (7,70) is formed by a metallic piston (8,80) which in the housing (1,10) one ventable space (9.90) limited.
2. Druckmittelspeicher nach Anspruch 1 dadurch gekennzeichnet, daß das erste (6,60) und das zweite Medientrennungselement (7,70) koaxial angeordnet sind.2. Pressure fluid accumulator according to claim 1, characterized in that the first (6.60) and the second media separation element (7.70) are arranged coaxially.
3. Druckmittelspeicher nach Anspruch 1 oder 2 dadurch gekennzeichnet, daß der Kolben (8) im Gehäuse (1) abgedichtet verschiebbar geführt ist und das erste Medientrennungselement (6) radial umgreift.3. Pressure fluid accumulator according to claim 1 or 2, characterized in that the piston (8) in the housing (1) is guided so as to be displaceable in a sealed manner and surrounds the first media separation element (6) radially.
4. Druckmittelspeicher nach Anspruch 1 oder 2 dadurch gekennzeichnet, daß die erste Kammer (20) zwischen der Wandung des Gehäuses (10) und dem ersten Medientrennungselement (60) ausgebildet ist und daß sowohl die zweite (30) als auch die dritte Kammer (40) innerhalb des ersten Medientrennungselementes (60) ausgebildet sind.4. Pressure medium accumulator according to claim 1 or 2, characterized in that the first chamber (20) is formed between the wall of the housing (10) and the first media separation element (60) and that both the second (30) and the third chamber (40 ) are formed within the first media separation element (60).
5. Druckmittelspeicher nach Anspruch 4 dadurch gekennzeichnet, daß die zweite Kammer (30) einerseits durch das erste Medientrennungselement (60) und andererseits durch ein zylindrisches Führungsteil (15) begrenzt ist, in dem die dritte Kammer (40) ausgebildet und der Kolben (80) geführt wird.5. Pressure medium accumulator according to claim 4, characterized in that the second chamber (30) is limited on the one hand by the first media separation element (60) and on the other hand by a cylindrical guide part (15) in which the third chamber (40) is formed and the piston (80 ) to be led.
6. Druckmittelspeicher nach Anspruch 5 dadurch gekennzeichnet, daß im Kolben (80) eine hydraulische Verbindung (16) zwischen der zweiten (30) und der dritten Kammer (40) ausgebildet ist, in der ein zum hydraulischen Anschluß (50) hin schließendes Rückschlagventil (17) eingefügt ist. 6. Pressure medium accumulator according to claim 5, characterized in that in the piston (80) a hydraulic connection (16) between the second (30) and the third chamber (40) is formed, in which a check valve closing towards the hydraulic connection (50) ( 17) is inserted.
7. Druckmittelspeicher nach Anspruch 3 dadurch gekennzeichnet, daß der Kolben (8) einen Bestandteil eines Wegmeßsystems bildet.7. Pressure fluid accumulator according to claim 3, characterized in that the piston (8) forms part of a displacement measuring system.
8. Druckmittelspeicher nach einem der Ansprüche 2 bis 7 dadurch gekennzeichnet, daß der entlüftbare Raum (9,90) gegenüber der zweiten (3,30) sowie der dritten Kammer (4,40) mittels zweier elastischer Dichtungen (11,12,110,120), vorzugsweise Dichtringe, abgedichtet ist. 8. Pressure fluid accumulator according to one of claims 2 to 7, characterized in that the ventable space (9.90) relative to the second (3.30) and the third chamber (4.40) by means of two elastic seals (11, 12, 110, 120), preferably Sealing rings, is sealed.
EP01944993A 2000-04-04 2001-04-03 Hydraulic fluid accumulator Withdrawn EP1272764A2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10016597 2000-04-04
DE10016597 2000-04-04
DE10101856A DE10101856A1 (en) 2000-04-04 2001-01-17 Pressure fluid accumulator
DE10101856 2001-01-17
PCT/EP2001/003783 WO2001075312A2 (en) 2000-04-04 2001-04-03 Hydraulic fluid accumulator

Publications (1)

Publication Number Publication Date
EP1272764A2 true EP1272764A2 (en) 2003-01-08

Family

ID=26005164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01944993A Withdrawn EP1272764A2 (en) 2000-04-04 2001-04-03 Hydraulic fluid accumulator

Country Status (4)

Country Link
US (1) US6644354B2 (en)
EP (1) EP1272764A2 (en)
JP (1) JP2003529726A (en)
WO (1) WO2001075312A2 (en)

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JP2002013501A (en) * 2000-06-30 2002-01-18 Nok Corp Accumulator
DE10139192A1 (en) * 2001-08-16 2003-03-06 Hydac Technology Gmbh piston accumulators
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US6644354B2 (en) 2003-11-11
WO2001075312A2 (en) 2001-10-11
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WO2001075312A3 (en) 2002-04-04
US20030075225A1 (en) 2003-04-24

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