EP0049824A1 - Réservoir de pression, en particulier accumulateur pour une installation à fluide - Google Patents

Réservoir de pression, en particulier accumulateur pour une installation à fluide Download PDF

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Publication number
EP0049824A1
EP0049824A1 EP81107800A EP81107800A EP0049824A1 EP 0049824 A1 EP0049824 A1 EP 0049824A1 EP 81107800 A EP81107800 A EP 81107800A EP 81107800 A EP81107800 A EP 81107800A EP 0049824 A1 EP0049824 A1 EP 0049824A1
Authority
EP
European Patent Office
Prior art keywords
housing
closure element
bladder
pressure vessel
seal
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
EP81107800A
Other languages
German (de)
English (en)
Other versions
EP0049824B1 (fr
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/fr
Application granted granted Critical
Publication of EP0049824B1 publication Critical patent/EP0049824B1/fr
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

  • the invention further relates to a method for mounting such a pressure vessel.
  • the inner chamber formed by the bladder is usually filled with a gas, while the outer chamber formed between the rigid housing and said bladder is acted upon by hydraulic oil.
  • the inner chamber filled with gas forms an elastic buffer for the hydraulic oil flowing into the outer chamber.
  • the pressure vessel explained at the outset can be found in German Offenlegungsschrift 29 42 584.
  • the housing here has an annular shoulder and an adjoining end region of enlarged diameter, into which the closure element is completely inserted.
  • the free edge area of the open end of the bladder is clamped in an annular recess which is formed by a corresponding shoulder area of the closure element.
  • the said edge area of the bladder is pressed outwards against the inner wall of the aforementioned annular shoulder of the housing.
  • the second annular groove receiving the O-ring lies between the said annular shoulder of the housing and its free edge at the open end of the housing.
  • the open end of the housing projects beyond the inserted closure element in the axial direction and has radially retracted or pressed-in wall sections which fix the closure element against displacement in the axial direction.
  • the edge region of the open end of the bladder is firmly attached, preferably vulcanized, to the outwardly facing shoulder section of the closure element.
  • the invention is therefore based on the object of improving the pressure vessel explained at the outset in such a way that it can be produced more economically without impairing the sealing of the bladder from the outside atmosphere and / or from the outer chamber receiving the hydraulic oil.
  • the housing of the new pressure vessel no longer needs to have a shoulder area of an enlarged diameter, but can instead be of cylindrical design with the same diameter, the production of the housing is simpler and therefore cheaper to carry out.
  • the edge region of the open end of the bladder no longer needs to be vulcanized to the closure element in the new embodiment. Rather, the inwardly projecting annular bead can be pressed into the first annular groove of the closure element in a simple manner and a connection can thus be established between the two parts.
  • This edge area of the bladder forms a seal between the bladder and the inner wall of the housing, while the seal in the second annular groove ensures a seal between the closure element and bladder.
  • the fastening for securing the position of the closure element in the housing can be an endless weld seam, which ensures a complete seal against the atmosphere. Overall, the new pressure vessel can therefore be manufactured quickly and inexpensively.
  • the seal in the second annular groove and the annular bead in the first annular groove together form a positive seal between the closure element, bladder and housing and thus reliably prevent gas or liquid from being exchanged between the individual components.
  • the seal in the second annular groove can be an O-ring in a manner known per se, while the bladder can also be made in a known manner from elastically resilient material and starting from a point in the vicinity of the inner end of the closure element or said seal can taper slightly towards its closed end. Thereby It is ensured that the bladder expands uniformly outwards when filled with gas under pressure and thereby lies against the inner wall of the housing.
  • the annular shoulder can bear axially against the edge of the open housing end.
  • 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.
  • gas under pressure can be pressed into the housing 12 or can be let out of this housing again.
  • the compressed gas valve 24 is fixed on the closure element 20 by means of 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, bears axially against the edge of the open housing end 16 and is connected here to the housing end via an endless weld seam 31 becomes.
  • 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 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.
  • the edge region 44 of the 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 bears 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 one half degree or a little more ensures a uniform expansion of the bladder 36 and a correspondingly uniform 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 via a hydraulic line to a hydraulic system, for example to a seat suspension system.
  • a gas line is then connected to the pressurized gas valve 24 to fill the inner chamber formed by the bladder 36 with gas up to a gas pressure of about 6.33 kg / cm 2 (90 psi).
  • Seat suspension systems that operate with hydraulic fluid are designed for higher pressures, which range from 7.03 to 8.44 kg / cm 2 (100 to 120 psi).
  • the various functions of the suspension system then result in hydraulic fluid entering the outer chamber of the housing 10 through the connection 18. 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. A seal 46, preferably an O-ring, is then inserted into the second annular groove 34 of the closure element 20. Then the open end 40 becomes 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 Réservoir de pression, en particulier accumulateur pour une installation à fluide Expired EP0049824B1 (fr)

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
US06/196,898 US4328836A (en) 1980-10-14 1980-10-14 Pressure vessel
US196898 1980-10-14

Publications (2)

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

Family

ID=22727202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107800A Expired EP0049824B1 (fr) 1980-10-14 1981-10-01 Réservoir de pression, en particulier accumulateur pour une installation à fluide

Country Status (11)

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

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 (4)

* 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
DE1269434B (de) * 1961-05-30 1968-05-30 Jean Mercier Druckbehaelter mit einer biegsamen und elastischen Trennwand
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3256911A (en) * 1964-06-01 1966-06-21 Mercier Olaer Patent Corp Pressure vessel
FR2082199A5 (fr) * 1970-03-06 1971-12-10 Mercier J
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
US4177836A (en) * 1978-10-23 1979-12-11 Deere & Company Disposable pressure vessel

Patent Citations (5)

* 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
DE1269434B (de) * 1961-05-30 1968-05-30 Jean Mercier Druckbehaelter mit einer biegsamen und elastischen Trennwand
US3907000A (en) * 1974-04-25 1975-09-23 Teledyne Sprague Eng Hydro-pneumatic flexible bladder accumulator
DE2518249A1 (de) * 1974-04-25 1975-11-13 Teledyne Sprague Eng Hydropneumatisches sammelgefaess mit flexibler blase
US4162692A (en) * 1976-09-07 1979-07-31 Hydrotrole Limited Hydro-pneumatic flexible bladder accumulator

Also Published As

Publication number Publication date
AR229409A1 (es) 1983-08-15
ES273287U (es) 1984-10-16
ATE8523T1 (de) 1984-08-15
EP0049824B1 (fr) 1984-07-18
BR8106605A (pt) 1982-06-29
ZA816606B (en) 1983-04-27
DE3164895D1 (en) 1984-08-23
ES273287Y (es) 1985-04-16
JPH0138961B2 (fr) 1989-08-17
ES8403577A1 (es) 1984-03-16
AU7605881A (en) 1982-04-22
US4328836A (en) 1982-05-11
AU549491B2 (en) 1986-01-30
JPS5794102A (en) 1982-06-11
CA1166551A (fr) 1984-05-01
ES516359A0 (es) 1984-03-16

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