EP0049824B1 - Druckgefäss, insbesondere Druckakkumulator für Druckmittelkreise - Google Patents

Druckgefäss, insbesondere Druckakkumulator für Druckmittelkreise Download PDF

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Publication number
EP0049824B1
EP0049824B1 EP81107800A EP81107800A EP0049824B1 EP 0049824 B1 EP0049824 B1 EP 0049824B1 EP 81107800 A EP81107800 A EP 81107800A EP 81107800 A EP81107800 A EP 81107800A EP 0049824 B1 EP0049824 B1 EP 0049824B1
Authority
EP
European Patent Office
Prior art keywords
bladder
housing
annular groove
annular
end cap
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.)
Expired
Application number
EP81107800A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0049824A1 (de
Inventor
Ivan Leroy Petrie
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Priority to AT81107800T priority Critical patent/ATE8523T1/de
Publication of EP0049824A1 publication Critical patent/EP0049824A1/de
Application granted granted Critical
Publication of EP0049824B1 publication Critical patent/EP0049824B1/de
Expired legal-status Critical Current

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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
    • F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
    • F15B1/125—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery characterised by the attachment 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
    • F15B2201/20—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
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3152—Accumulator separating means having flexible separating means the flexible separating means being bladders
    • 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/43—Anti-extrusion means
    • F15B2201/435—Anti-extrusion means being fixed to the separating means

Definitions

  • holes can be guided through the wall of the closure element in the region of the first annular groove, which establish a connection between the gas space and the annular groove, so that the annular bead of the bladder entering the annular groove is acted upon by the gas pressure and thus to improve a seal against the inner wall of the Housing is pressed.
  • a hydropneumatic pressure accumulator can be found in US Pat. No. 3,907,000, the closure element of which is completely inserted into the housing and is welded to the inner wall thereof.
  • the closure element is stepped on its circumference and is encompassed by the free edge of the bladder, which, however, does not lie axially against the annular shoulder of the closure element.
  • the bladder does not have a smooth outer surface and lies only in the area of the closure element with two axially successive annular beads on the inner wall of the housing.
  • An O-ring is arranged as a seal between the bladder and a second ring shoulder of the closure element.
  • the closure element engages with a lower, radially directed bead edge in a corresponding annular groove of the bladder.
  • the invention has for its object to improve the embodiment described above with regard to the sealing of the bladder from the outside atmosphere and / or from the outer chamber receiving the hydraulic oil while reducing the manufacturing costs.
  • annular bead of the bladder engages in the first annular groove of the closure element, while a seal is inserted in the second annular groove of the closure element, which seals the bladder with respect to the closure element.
  • the combination of ring bead and seal is designed so that the ring bead is pressed into the first ring groove when the closure element is fully pressed into the housing. This pressure results in a tight seal between the outer surface of the bladder and the inner wall of the housing.
  • the seal in the second annular groove ensures a seal between the closure element and the bladder, so that the gas contained in the bladder cannot mix with the oil which is located in the outer chamber formed by the bladder and the housing. Because of the large distance between the seal, which is preferably an O-ring, from the weld seam between the closure element and the housing, it is ensured that no damage to the seal can occur during welding.
  • the bladder is made in a manner known per se from elastically resilient material, so that it is ensured in connection with its attachment and its shape that the bladder is uniform when filled with compressed gas expand outwards and lie against the inner wall of the housing.
  • an exemplary embodiment of the invention is shown in longitudinal section.
  • the pressure vessel 10 shown also called pressure accumulator, consists of a cylindrical housing 12 made of rigid material with a closed end 14 and an open end 16.
  • the closed end 14 is provided with a connection 18, through which liquid into the housing, or else can flow out of the housing.
  • the open end 16 of the housing is closed by a plug-like closure element 20, which is inserted into the housing end and has a continuous axial bore 22 in which a compressed gas valve 24 is fixed, which is usually closed, but can be flowed through in one direction or the other if necessary.
  • a compressed gas valve 24 is fixed on the closure element 20 via a nut 26 and sealed from the atmosphere by a protective cap 28.
  • the entire compressed gas valve 24 lies completely within the outer contours of the closure element 20.
  • the closure element 20 has on its outer circumference an annular shoulder 30 which, when the closure element is firmly pressed into the open end 16 of the housing 12, lies axially against the edge of the open housing end 16 and here via an endless weld seam 31 with the Housing end is connected.
  • annular shoulder 30 On the portion of the closure element protruding into the housing, two annular grooves 32, 34 are provided in the outer circumference.
  • the first annular groove 32 serves to connect the closure element 20 to an essentially cylindrical bladder 36, while the second annular groove 34 serves to receive a seal 46, preferably an O-ring.
  • the bladder 36 is made of resilient material such as. B. rubber and has a closed end 38 and an open end 40.
  • an expansion limiting element 42 is provided which is intended to prevent the bladder from being pushed through the connection 18 if the bladder is stretched too much and is thereby damaged when the internal pressure in the bladder 36 becomes greater than the pressure in the connection 18
  • Edge region 44 of the open end 40 of the bladder 36 is designed as an inwardly projecting annular bead which is adapted in its cross-sectional contour to that of the first annular groove 32 of the closure element 20 and is pressed into this second annular groove to connect the two parts to one another.
  • the annular bead 44 is preferably located at the extreme end of the bladder 36.
  • the O-ring 46 in the second annular groove 34 serves to seal between the outer periphery of the closure element 20 and the inner surface of the bladder 36.
  • the combination of annular bead 44 and seal 46 is designed so that when the closure element 20 is completely in the housing 12 is pressed in until the annular shoulder 30 lies axially against the edge of the open housing end 16, the annular bead 44 is pressed into the first annular groove 32.
  • This pressure leads to a tight seal between the outer surface of the bladder 36 and the inner wall of the housing 12.
  • this sealing system cannot be thermally damaged if the closure element 20 is connected to the housing 12 by the endless weld seam 31.
  • the bladder 36 tapers slightly conically starting from a point 48 in the vicinity of the inner end 50 of the closure element 20 or the aforementioned seal 46 towards its closed end 38. This slight taper, on the order of half a degree or slightly more, ensures a uniform expansion of the bladder 36 and a correspondingly even abutment of this bladder against the inner wall of the housing 12 when pressurized gas is introduced into the bladder.
  • the pressure vessel 10 is usually connected via its connection 18 to a hydraulic system via a hydraulic line, e.g. B. a seat suspension system.
  • a gas line is then connected to the pressure gas valve 24 to fill the inner chamber formed by the bladder 36 with gas up to a gas pressure of approximately 6.24 bar (90 psi).
  • Seat suspension systems that operate with hydraulic fluid are designed for higher pressures, which range from 6.93 to 8.16 bar (100 to 120 psi).
  • the various functions of the suspension system then cause hydraulic fluid to pass through the connection 18 into the outer chamber of the housing 10. Since the hydraulic fluid has a higher pressure than inside the bladder 36, the bladder 36 is compressed, which increases the original gas pressure in the bladder. The system stabilizes when there is pressure equalization between the outer and inner chamber of the pressure vessel.
  • the hydraulic fluid leaves the pressure vessel 10 either by increasing the gas pressure within the bladder 36 or by reducing the hydraulic pressure within the suspension system. As the hydraulic fluid drains, the bladder 36 expands back to its original shape so that the operation can be repeated.
  • the housing 12 When assembling the pressure vessel 10, the housing 12 must first be carefully cleaned of all contaminants such as oil, dirt and other particles. Then a seal 46, preferably an O-ring, is inserted into the second annular groove 34 of the closure element 20 inserted. Then the open end 40 of the bladder 36 is pushed over the inner end of the closure element 20 until the annular bead 44 engages in the first annular groove 32. The closure element 20 is then inserted together with the bladder 36 attached to it into the housing 12 and then pressed in under pressure until the annular shoulder 20 of the closure element lies axially against the edge of the open housing end 16. The closure element 20 is then welded to the housing 12 using an endless welding bead 31 or a similar method. The compressed gas valve 24 is then screwed into the axial bore 22 of the closure element 20 and fixed via the nut 26. The pressure vessel 10 is then ready for installation.
  • a seal 46 preferably an O-ring

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
EP81107800A 1980-10-14 1981-10-01 Druckgefäss, insbesondere Druckakkumulator für Druckmittelkreise Expired EP0049824B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81107800T ATE8523T1 (de) 1980-10-14 1981-10-01 Druckgefaess, insbesondere druckakkumulator fuer druckmittelkreise.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US196898 1980-10-14
US06/196,898 US4328836A (en) 1980-10-14 1980-10-14 Pressure vessel

Publications (2)

Publication Number Publication Date
EP0049824A1 EP0049824A1 (de) 1982-04-21
EP0049824B1 true EP0049824B1 (de) 1984-07-18

Family

ID=22727202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107800A Expired EP0049824B1 (de) 1980-10-14 1981-10-01 Druckgefäss, insbesondere Druckakkumulator für Druckmittelkreise

Country Status (11)

Country Link
US (1) US4328836A (es)
EP (1) EP0049824B1 (es)
JP (1) JPS5794102A (es)
AR (1) AR229409A1 (es)
AT (1) ATE8523T1 (es)
AU (1) AU549491B2 (es)
BR (1) BR8106605A (es)
CA (1) CA1166551A (es)
DE (1) DE3164895D1 (es)
ES (2) ES273287Y (es)
ZA (1) ZA816606B (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785956A (en) * 1982-08-23 1988-11-22 Essef Industries, Inc. Tank fitting for a filament-wound vessel
ES2062919B1 (es) * 1992-10-02 1997-05-01 Fico Cables Sa Tapa con dispositivo compensador volumetrico para cilindros hidraulicos que trabajan a presion.
US5896843A (en) * 1997-11-24 1999-04-27 Siemens Automotive Corporation Fuel rail damper
US5806705A (en) * 1997-12-05 1998-09-15 Essef Corporation Sealing technique for hydropneumatic pressure vessel
AU2004244652B2 (en) * 2004-01-06 2011-09-29 Eaton Corporation Trapped gas removal in liquid-gas accumulator
US7497202B2 (en) * 2004-10-15 2009-03-03 Robert Bosch Gmbh Hydraulic damper element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674054A (en) * 1970-03-06 1972-07-04 Jacques H Mercier Pressure vessel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1134255B (de) * 1954-02-03 1962-08-02 Jean Mercier Druckbehaelter mit einer Blase
US3256911A (en) * 1964-06-01 1966-06-21 Mercier Olaer Patent Corp Pressure vessel
DE1269434B (de) * 1961-05-30 1968-05-30 Jean Mercier Druckbehaelter mit einer biegsamen und elastischen Trennwand
BE795498A (fr) * 1972-03-15 1973-05-29 Mercier Jacques H Reservoir de pression
US3847182A (en) * 1973-06-18 1974-11-12 E Greer Hydro-pneumatic flexible bladder accumulator
US3907000A (en) * 1974-04-25 1975-09-23 Teledyne Sprague Eng Hydro-pneumatic flexible bladder accumulator
US4162692A (en) * 1976-09-07 1979-07-31 Hydrotrole Limited Hydro-pneumatic flexible bladder accumulator
US4177836A (en) * 1978-10-23 1979-12-11 Deere & Company Disposable pressure vessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674054A (en) * 1970-03-06 1972-07-04 Jacques H Mercier Pressure vessel

Also Published As

Publication number Publication date
CA1166551A (en) 1984-05-01
AR229409A1 (es) 1983-08-15
ES273287U (es) 1984-10-16
ES8403577A1 (es) 1984-03-16
AU549491B2 (en) 1986-01-30
US4328836A (en) 1982-05-11
JPS5794102A (en) 1982-06-11
JPH0138961B2 (es) 1989-08-17
ES273287Y (es) 1985-04-16
BR8106605A (pt) 1982-06-29
DE3164895D1 (en) 1984-08-23
ATE8523T1 (de) 1984-08-15
AU7605881A (en) 1982-04-22
ES516359A0 (es) 1984-03-16
ZA816606B (en) 1983-04-27
EP0049824A1 (de) 1982-04-21

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