EP4416394B1 - Unité de dégazage de cylindre et cylindre de travail - Google Patents

Unité de dégazage de cylindre et cylindre de travail

Info

Publication number
EP4416394B1
EP4416394B1 EP21806966.4A EP21806966A EP4416394B1 EP 4416394 B1 EP4416394 B1 EP 4416394B1 EP 21806966 A EP21806966 A EP 21806966A EP 4416394 B1 EP4416394 B1 EP 4416394B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
annular chamber
air space
degassing unit
designed
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.)
Active
Application number
EP21806966.4A
Other languages
German (de)
English (en)
Other versions
EP4416394A1 (fr
Inventor
Josef Bueter
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.)
Buemach Engineering International BV
Original Assignee
Buemach Engineering International BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Buemach Engineering International BV filed Critical Buemach Engineering International BV
Publication of EP4416394A1 publication Critical patent/EP4416394A1/fr
Application granted granted Critical
Publication of EP4416394B1 publication Critical patent/EP4416394B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members

Definitions

  • the invention relates to a cylinder degassing unit for venting a working cylinder and to a working cylinder with such a cylinder degassing unit.
  • state-of-the-art technology for example, provides an air exchange hole that connects the empty movement space to the ambient atmosphere.
  • such an air exchange bore is provided with a functional element, for example, according to the state of the art.
  • the object of the invention is to provide a cylinder degassing unit with which the venting of a residual cylinder space of a working cylinder can be provided in a structurally simple, cost-effective, particularly reliable manner, and adaptively for different parameters. Furthermore, the object is to provide a working cylinder with such a cylinder degassing unit.
  • the cylinder degassing unit comprises as basic components a base body, an inner discharge section, an annular chamber and a discharge section.
  • the cylinder degassing unit is designed as a compact modular component.
  • the cylinder degassing unit is used to vent piston chambers in lifting or pulling cylinders.
  • the cylinder degassing unit is based on the fact that a working cylinder has a residual air space that is not pressurized by a hydraulic pressure medium and whose volume changes as a result of the stroke of the working cylinder's piston.
  • a wall perforation is formed on the working cylinder, providing a connection between the residual air space and the outside atmosphere, which is routed via the cylinder degassing unit.
  • the base body is designed for a fixed position on a hydraulic working cylinder, hereinafter also referred to as the working cylinder.
  • the base body is arranged at least partially in the wall perforation of the working cylinder.
  • the base body has a concave contour, which preferably forms the annular chamber in the form of a circumferential annular gap or a circumferential annular groove.
  • the concave contour is preferably designed as a diameter taper of the base body and, together with the inner surface of the wall perforation, forms a circumferential cavity that provides the annular chamber.
  • the volume of the annular chamber controls the storable air volume and the outgoing air flow.
  • the annular chamber also functions as a pressure chamber.
  • the inner discharge section has an inner discharge channel and an inner elastomeric ring body.
  • the inner discharge channel is arranged in the base body and can, in particular, be provided as a bore.
  • the inner discharge channel connects the residual cylinder air space with the annular chamber.
  • the inner discharge channel has an inner inlet at one end, located at the residual cylinder air space. At the other end of the inner discharge channel, there is an intermediate outlet at the annular chamber.
  • the inner elastomeric annular body covers the intermediate outlet and has a prestress.
  • the inner elastomeric annular body is designed to form a first pressure barrier in an outlet direction and a second sealing plane in an inlet direction.
  • the outer discharge section is constructed similarly to the inner discharge section. It is also located in the base body and has an outer discharge channel and an outer elastomeric annular body.
  • the outer discharge channel connects the annular chamber to the outside atmosphere.
  • the preferably inclined outer discharge channel has an intermediate inlet at the cylinder's residual air space at its first end and an outer outlet to the outside atmosphere at its opposite end.
  • the outer elastomeric annular body covers the outer outlet.
  • the outer elastomeric annular body also has a prestress and is designed to form a second pressure barrier in the discharge direction and a first sealing plane in the inlet direction. When the second pressure barrier is overcome, the discharge medium escapes into the low-pressure region of the atmosphere.
  • the discharge direction is understood to be the direction from inside to outside, i.e., from the residual cylinder air space toward the outside atmosphere.
  • the discharge direction describes the possible path of a discharge medium from the residual cylinder air space into the outside atmosphere.
  • the inlet direction is understood to be the direction opposite to the outlet direction.
  • the order of designation of the pressure barriers follows the discharge direction and the order of designation of the sealing levels follows the inlet direction.
  • the discharge medium is in particular gaseous media such as air or gases which are released from the hydraulic pressure medium as a result of the pressure differences, or partly also hydraulic pressure medium which is released in smaller quantities into the cylinder residual air space by wiping on the inner jacket of the working cylinder as a result of the piston movement or as a leakage flow. or condensate.
  • the discharge medium is sometimes referred to as gas or air.
  • the sealing levels make it possible to divide a high-pressure area in the cylinder residual space and the inner discharge channel, a medium-pressure area after the inner elastomeric ring body in the ring chamber and the outer discharge channel up to the outer ring body and then a low-pressure area in the outside atmosphere.
  • the material hardness, the preload after being pulled onto the base body and the wall thickness of the respective elastomer ring body as well as the opening cross-section of the intermediate outlet or the outer outlet define the pressure required for the discharge medium to flow out.
  • the inner elastomeric ring expands, allowing the discharge medium to escape into the annular chamber. Due to the closing force created by the preload, a defined pressure remains in the residual cylinder air space after the discharge.
  • the outer elastomeric ring expands, opening the outer outlet.
  • the gas can escape from the intermediate space via the outer discharge channel and the outer outlet into the atmosphere.
  • the preload of the outer elastomeric ring defines the residual pressure at which it closes the outer outlet. This allows a defined pressure to be maintained in the annular chamber, also referred to here as the intermediate pressure zone.
  • the air distribution module is further designed according to the invention to have a full discharge operating state, a partial discharge operating state and a closed operating state.
  • a two-stage discharge path is provided, first from the cylinder's residual air space into the annular chamber and then from there into the atmosphere, with two barrier-forming elastomeric annular bodies.
  • This achieves a lock function.
  • the cylinder's residual air space is not directly connected to the cylinder's surroundings. This, in turn, leads to increased protection of the cylinder's residual air space against the harmful effects of the atmospheric environment. Dirt particles, Harmful gases or aerosols are blocked in two stages and cannot penetrate the cylinder and damage it.
  • the outer discharge section already shields the annular chamber from contamination, so that the inner elastomer ring in particular is particularly protected and its functionality is not impaired even under problematic external atmospheric conditions.
  • the residual pressure is, on the one hand, one stage of a beneficial pressure cascade, providing an intermediate pressure level between a possible maximum pressure in the residual cylinder air space and a merely atmospheric pressure in the outside atmosphere.
  • the total pressure difference is thus advantageously divided between two stages.
  • the residual pressure supports the sealing effect of the inner piston ring in its closed operating state.
  • the transition of the outflowing air during rapid piston movements into at least two pressure stages advantageously reduces noise pollution.
  • the discharge flow is buffered by the annular chamber. This avoids the loud hissing noises that occur in conventional cylinders that discharge directly from the high-pressure to the low-pressure range.
  • the base body has a cylindrical basic shape and is received in a wall hole of the cylinder residual air space designed as a hollow cylindrical bore.
  • the inner elastomeric ring body and the outer elastomeric ring body are of identical construction.
  • the concave contour of the base body can be created inexpensively and easily, preferably by turning. However, milling a non-radially symmetrical concave contour is also possible.
  • the geometric design of the concave contour of the base body, in conjunction with the usually cylindrical inner shell, defines the shape and volume of the annular chamber. In this way, the pressure conditions and flow behavior can be specifically influenced.
  • the annular chamber is designed for an overpressure relative to the outside atmosphere in the closed operating state.
  • the cylinder degassing unit has an inner O-ring which is designed for a sealing engagement with the wall perforation and forms a sealing plane between the cylinder residual air space and the annular chamber.
  • the cylinder degassing unit has an outer O-ring which is designed for a sealing engagement with the wall perforation and forms a sealing plane between the annular chamber and the outside atmosphere.
  • the cylinder degassing unit has a further inner discharge section and a further annular chamber, which are functionally arranged in series with the inner discharge section and the annular chamber.
  • the further training is based on another special advantage: the multi-level structure can be further expanded with a third or further level.
  • additional pressure stages can be connected in series within the cylinder degassing unit. This allows damping, noise generation, and the behavior of the outflowing gases to be controlled and further improved. Furthermore, the pressure difference required between the respective pressure stages is advantageously reduced while maintaining the same overall pressure difference between the residual cylinder air space and the outside atmosphere.
  • a further aspect of the present invention relates to a working cylinder.
  • This cylinder has a residual air space, which is associated with a wall perforation that provides a passage.
  • the working cylinder according to the invention is advantageously designed as a single-acting hydraulic working cylinder that is actuated by a fluid in only one working direction.
  • the empty movement space defined by the piston and its piston seal, forms the residual cylinder air space.
  • the empty movement space is the piston chamber in the case of a pull cylinder and the piston rod chamber in the case of a pressure cylinder.
  • the working cylinder is designed in a conventional manner.
  • the Figure 1 shows a schematic sectional view of an embodiment of the working cylinder 8 with the mounted cylinder degassing unit 7.
  • the working cylinder 8 is a hydraulic pull cylinder. It has a lateral pressure medium connection in the cylinder wall through which the piston rod chamber can be pressurized. This applies pressure to the annular surface of the piston facing the guide closure part, and the piston, with the connected piston rod, performs an inward stroke movement.
  • the residual cylinder air space is not pressurized with the pressure medium but remains empty. As a result of the stroke movement, the volume of the residual cylinder air space 5 changes.
  • the cylinder degassing unit 7 is placed with a connection to the cylinder residual air space 5 in the exemplary embodiment in a widened section of the wall perforation 5.1 designed as a bore, which is associated with the cylinder residual air space 5 and forms a uniform pressure chamber with it. Due to this arrangement, the cylinder degassing unit 7 of the Vent the remaining cylinder air space 5 during a retracting piston movement. Further details of the cylinder degassing unit 7 are shown below. Fig. 2
  • the Figure 2 shows a schematic sectional view of the cylinder degassing unit 7.
  • This consists of the base body 1, an inner discharge section 2 and an outer discharge section 4. Furthermore, the annular chamber 3 is formed by the concave contour 1.1 of the base body 1.
  • the outer discharge section 4 is designed analogously and consists of the outer discharge channel 4.1 and the outer elastomeric annular body 4.2. Designed as a bore, the outer discharge channel 4.1 penetrates the base body 1.
  • the outer discharge channel 4.1 has a pressure connection to the annular chamber 3 via the intermediate inlet 4.3 and ends in the discharge direction with the outer outlet 4.4 on the outer elastomeric annular body 4.2, thus leading to the outside atmosphere 6, which is not part of the device according to the invention.
  • the gases then flow into the outer discharge section 4. Via the intermediate inlet 4.3, the gases flow into the outer discharge channel 4.1.
  • the outer outlet 4.4 is closed by the outer elastomeric ring body 4.2. This also opens at a certain gas pressure, allowing it to flow into the outside atmosphere, the low-pressure region.
  • the circles surrounding reference numerals 5, 3, and 6 indicate the different pressure zones. Furthermore, the horizontal dashed lines schematically show the boundaries of the different pressure zones.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Claims (9)

  1. Unité de dégazage du cylindre (7),
    présentant un corps de base (1), une section de décharge intérieure (2), une chambre annulaire (3) et une section de décharge extérieure (4),
    où le corps de base (1) est conçu pour être disposé en position fixe sur un cylindre de travail (8) au niveau d'une trou de paroi (5.1) d'une chambre d'air résiduel du cylindre (5) et présente un contour concave (1.1) qui forme la chambre annulaire (3),
    où la section de décharge intérieure (2) comprend un canal de décharge intérieure (2.1) et un corps annulaire élastomère intérieur (2.2),
    où le canal de décharge intérieur (2.1) est disposé dans le corps de base (1) et est conçu pour relier la chambre d'air résiduelle du cylindre (5) à la chambre annulaire (3) et présente une entrée intérieure (2.3) pouvant être reliée à la chambre d'air résiduelle du cylindre (5) et une sortie intermédiaire (2.4) sur la chambre annulaire (3),
    où le corps annulaire élastomère intérieur (2.2) recouvre la sortie intermédiaire (2.4) et présente une précontrainte et est conçu pour former une première barrière de pression dans une direction de décharge et un deuxième plan d'étanchéité dans une direction d'admission,
    où la section de décharge extérieur (4) comprend un canal de décharge extérieur (4.1) et un corps annulaire élastomère extérieur (4.2),
    où le canal de décharge extérieur (4.1) est disposé dans le corps de base (1) et est conçu pour relier la chambre annulaire (3) à une atmosphère extérieure (6), et présente une entrée intermédiaire (4.3) sur la chambre annulaire (3) et une sortie extérieure (4.4) pouvant être reliée à l'atmosphère extérieure (6),
    où le corps annulaire élastomère extérieur (4.2) recouvre la sortie extérieure (4.4) et présente une précontrainte et est conçu pour former une deuxième barrière de pression dans une direction de décharge et un premier plan d'étanchéité dans une direction d'admission,
    où l'unité de dégazage du cylindre (7) est adaptée pour avoir un état de fonctionnement de décharge complète, un état de fonctionnement de décharge partielle et un état de fonctionnement de fermeture, et où, dans l'état de fonctionnement de décharge complète, il existe une surpression dans la chambre d'air résiduel du cylindre (5) par rapport à l'atmosphère extérieure (6), qui surmonte les première et deuxième barrières de pression et fournit une sortie de fluide de la chambre d'air résiduel du cylindre (5) via la section de décharge intérieure (2), la chambre annulaire (3) et la section de décharge extérieure (4) dans l'atmosphère extérieure (6),
    où, dans l'état de fonctionnement de décharge partielle, une surpression est présente (3) dans la chambre d'air résiduel du cylindre (5) par rapport à la chambre annulaire, qui surmonte exclusivement la première barrière de pression et fournit une sortie de fluide de la chambre d'air résiduel du cylindre (5) via la section de décharge intérieure (2) dans la chambre annulaire (3), et où la section de décharge extérieure (4) rend étanche la chambre annulaire (3) par rapport à l'atmosphère extérieure (6), et où, dans l'état de fonctionnement de fermeture, ni la première ni la deuxième barrière de pression ne sont surmontées et la section de décharge intérieure (2) rend étanche la chambre d'air résiduel du cylindre (5) par rapport à la chambre annulaire (3) et la section de décharge extérieure (4) rend étanche la chambre annulaire (3) par rapport à l'atmosphère extérieure (6).
  2. Unité de dégazage du cylindre (7) selon la revendication 1
    est caractérisée en ce
    que le corps de base (1) présente une forme de base cylindrique et est conçu pour être reçu dans un trou de paroi réalisé sous forme d'alésage cylindrique creux vers la chambre d'air résiduel du cylindre (5).
  3. Unité de dégazage du cylindre (7) suivant une des revendications précédentes
    est caractérisée en ce
    que le corps annulaire élastomère intérieur et le corps annulaire élastomère extérieur (2.2, 4.2) sont de construction identique.
  4. Unité de dégazage du cylindre (7) suivant une des revendications précédentes
    est caractérisée en ce
    que la chambre annulaire (3) est formée par le contour concave (1.1) du corps de base (1) et une enveloppe intérieure du trou de paroi.
  5. Unité de dégazage du cylindre (7) suivant une des revendications précédentes
    est caractérisée en ce
    que la chambre annulaire (3) est conçue, dans l'état de fonctionnement de fermeture, pour une surpression par rapport à l'atmosphère extérieure (6).
  6. Unité de dégazage du cylindre (7) suivant une des revendications précédentes
    est caractérisée en ce
    que celle-ci présente un joint torique intérieur (9) qui est conçu pour un appui étanche sur le trou de paroi et qui forme un plan d'étanchéité entre la chambre d'air résiduel du cylindre (5) et la chambre annulaire (3).
  7. Unité de dégazage du cylindre (7) suivant une des revendications précédentes
    est caractérisée en ce
    que celle-ci présente un joint torique extérieur qui est conçu pour un appui étanche sur le trou de paroi (5.1) et qui forme un plan d'étanchéité entre la chambre annulaire (3) et l'atmosphère extérieure (6).
  8. Unité de dégazage du cylindre (7) suivant une des revendications précédentes
    est caractérisée en ce
    que celle-ci présente une autre section de décharge intérieure et une autre chambre annulaire qui sont disposées fonctionnellement en série avec la section de décharge intérieure (2) et la chambre annulaire (3).
  9. Cylindre de travail (8),
    comprenant la chambre d'air résiduel du cylindre (6) et un trou de paroi (5.1),
    ainsi que comprenant une unité de dégazage cylindrique (7), qui est disposée sur le trou de paroi (5.1), où l'unité de dégazage cylindrique (7) est réalisée selon l'une des revendications 1 à 8.
EP21806966.4A 2021-10-12 2021-10-12 Unité de dégazage de cylindre et cylindre de travail Active EP4416394B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2021/000169 WO2023061522A1 (fr) 2021-10-12 2021-10-12 Unité de dégazage de cylindre et cylindre de travail

Publications (2)

Publication Number Publication Date
EP4416394A1 EP4416394A1 (fr) 2024-08-21
EP4416394B1 true EP4416394B1 (fr) 2025-08-13

Family

ID=78621592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21806966.4A Active EP4416394B1 (fr) 2021-10-12 2021-10-12 Unité de dégazage de cylindre et cylindre de travail

Country Status (6)

Country Link
US (1) US12297849B2 (fr)
EP (1) EP4416394B1 (fr)
JP (1) JP7749818B2 (fr)
CN (1) CN118119773A (fr)
DE (1) DE112021008353A5 (fr)
WO (1) WO2023061522A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE124827C (fr)
DE1158784B (de) 1960-03-22 1963-12-05 Nuquip Ltd UEberdruckventil
JPS5043761Y1 (fr) * 1972-09-06 1975-12-15
DE2419118A1 (de) * 1974-04-20 1975-11-13 Hubert Fussangel Stufenlos verstellbarer stossdaempfer, insbesondere fuer industrielle anwendungszwecke
YU111876A (en) 1975-08-22 1982-06-30 Gelenkwellenbau Gmbh Ventilating valve for removing air from the inside of elements of a universal joint shaft, which are telescopically shiftable one into another
FR2674376B1 (fr) * 1991-01-25 1994-11-04 Joel Huitric Soupape pour batteries etanches.
GB9111327D0 (en) * 1991-05-24 1991-07-17 Pall Corp Automatic bleed valves
DE19820578C5 (de) * 1998-05-08 2008-08-14 Zf Sachs Ag Geber-oder Nehmerzylinder einer hydraulischen Betätigungseinrichtung
DE10164968B4 (de) 2000-11-17 2013-10-31 Schaeffler Technologies AG & Co. KG Hydraulisches System
DE202005003835U1 (de) * 2005-03-10 2005-05-04 Abertax Research And Development Ltd. Entgasungsventil für Batteriezellen
DE102008041115A1 (de) 2008-08-08 2010-02-11 Zf Friedrichshafen Ag Hydraulisches Betätigungssystem für eine Kraftfahrzeugkupplung mit einer Entlüftungseinrichtung
DE202011102288U1 (de) * 2011-06-24 2011-11-30 Bümach Engineering International B.V. Gasaustauschsperre für druckmittelbetriebene Verbraucher
DE102015218058B4 (de) 2015-09-21 2017-09-14 Festo Ag & Co. Kg Pneumatisches Antriebssystem mit Entlüftungseinrichtung
CN211314725U (zh) * 2019-08-29 2020-08-21 苏州金维克液压动力设备有限公司 一种用于液压缸的排气装置

Also Published As

Publication number Publication date
JP7749818B2 (ja) 2025-10-06
EP4416394A1 (fr) 2024-08-21
US12297849B2 (en) 2025-05-13
US20240410403A1 (en) 2024-12-12
CN118119773A (zh) 2024-05-31
JP2024536032A (ja) 2024-10-04
WO2023061522A1 (fr) 2023-04-20
DE112021008353A5 (de) 2024-07-25

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