EP0202502B1 - Accumulateur avec première et seconde chambre - Google Patents

Accumulateur avec première et seconde chambre Download PDF

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Publication number
EP0202502B1
EP0202502B1 EP86105733A EP86105733A EP0202502B1 EP 0202502 B1 EP0202502 B1 EP 0202502B1 EP 86105733 A EP86105733 A EP 86105733A EP 86105733 A EP86105733 A EP 86105733A EP 0202502 B1 EP0202502 B1 EP 0202502B1
Authority
EP
European Patent Office
Prior art keywords
chamber
channel
valve
pressure
space
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
EP86105733A
Other languages
German (de)
English (en)
Other versions
EP0202502A1 (fr
Inventor
Jerald Dean Bernard
Sarkis Aram Koltookian
Kenneth Scott Mealhow
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 AT86105733T priority Critical patent/ATE45022T1/de
Publication of EP0202502A1 publication Critical patent/EP0202502A1/fr
Application granted granted Critical
Publication of EP0202502B1 publication Critical patent/EP0202502B1/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
    • 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
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • 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 relates to a pressure accumulator with a first and a second chamber, wherein in the first chamber a bellows dividing them into a first and a second space is arranged, the second chamber connected to one of the spaces and in this connection depending on the valve opening and closing valve is provided.
  • pressure accumulators are mainly used for storing energy, for absorbing shock loads, for gradually building up pressure and for maintaining a constant pressure.
  • Pneumatic pressure accumulators are used in particular for absorbing shock loads, which store excess oil quantities in times when peak pressures occur and release the oil after the shock pressure. This reduces vibrations and noise in the system.
  • the accumulator can also contribute to the softer workflow, e.g. when a pump with a variable delivery volume goes into the working position. The pressure drop is bridged by the fact that the pressure accumulator supplies pressure oil at this moment.
  • Pneumatic accumulators work with compressible gas, and typically gas and oil are in the same container so that as the oil pressure rises, the gas is compressed by the inflowing oil, and when the oil pressure falls, the gas expands and the oil pushes out of the container.
  • the gas is separated from the oil by a bellows or by a piston provided with sealing rings.However, it can happen that the highly compressed gas escapes slowly through the bellows or sealing rings, which means that the pressure potential is continuously reduced. This in turn necessitates periodic maintenance work to recharge the accumulator so that it performs as required.
  • the pressure accumulator from which the invention is based (US Pat. No. 3,695,297) is designed as a pressure tank to compensate for the changes in the oil volume, the oil being located in cables which are subject to temperature fluctuations.
  • This pressure accumulator one has already abandoned the one-piece container design and has provided two valves, each of which can be closed by means of a bellows provided with a membrane, with the inlet to the cable being able to be shut off via one of the valves and pressure compensation into the other valve can be brought about in both chambers, for which purpose both chambers are filled with a liquid.
  • the valve is arranged so that, as already stated, it is actuated via the diaphragm of the bellows, against the action of springs and the liquid pressure prevailing in one chamber. Otherwise, this valve has end faces serving as sealing surfaces.
  • the object to be achieved with the invention is seen in making the pressure accumulator more advantageous with regard to its valve arrangement, wherein pressure equalization is ensured.
  • valve has a valve spool with two end faces, one of which is exposed to the pressure in the space connected to the second chamber and the other to atmospheric pressure and one of the selected relative pressure in the is applied to the space defining the spring connected space, and that the pressure in the space connected to the second chamber shifts the valve spool into the blocking position and the atmospheric pressure and the spring pushes the valve spool into the opening position, the loading of one End face acts against the action of the other end face, so that the valve shifts depending on the pressure difference between the atmosphere and the charged space between its two end positions, whereby either a further charging is permitted or a further charging is prevented.
  • the first and second chambers are connected to one another via an intermediate piece in which a channel connecting the chambers is provided with a blind bore, the blind bore receiving the valve designed as a valve slide and the closed end of the blind bore via a ventilation channel with the atmosphere connected is.
  • the intermediate piece can expediently be designed as an axially extending cylinder with a radially extending valve bore into which the axially extending channel leading to the second chamber opens, in the intermediate piece the channel connected to one of the spaces of the first chamber extending axially is provided and opens into the valve bore in which the valve slide is arranged.
  • the valve slide can have a blind bore arranged radially with respect to the intermediate piece, which is constantly connected to the one channel connected to one of the spaces of the first chamber, and a radial channel arranged axially with respect to the intermediate piece, which is permanently connected to the blind bore and depending on the position of the valve spool displaceable against the action of a spring, it can be connected to the channel leading to the second chamber, which results in a particularly simple valve arrangement, which also makes it possible for the tension of the spring to be easily adjusted.
  • valve bore can be closed by means of a threaded plug at the end which is connected to the channel connected to one of the spaces in the first chamber and by the other end the ventilation duct is connected to the atmosphere.
  • a closable test opening opens in one of the channels connected to one of the spaces in the first chamber and a closable fill opening opens in the channel leading to the second chamber.
  • a pressure accumulator 10 which consists of two housing parts 12 which are interconnected by a cylindrical, axially extending intermediate piece 14. As a result, the pressure accumulator is divided into a first chamber 16 and a second chamber 18.
  • a bellows 20 made of flexible material is inserted between one of the housing parts 12 and the intermediate piece 14 in a sealed manner, as a result of which the first chamber is separated into a liquid-absorbing space 22 and a charged space 24.
  • An inlet 26 connects the space 22 with a hydraulic circuit or a consumer, not shown in the drawing.
  • the second space 18 contains highly compressed gas such as nitrogen and is provided with an inlet 28 which is normally closed by a plug 30.
  • a blind bore 32 which is open to the space 24, extends into the end piece of the intermediate piece 14.
  • a radial channel 34 which connects the blind bore 32 to the chamber 24, opens into this blind bore.
  • the blind bore is also connected to the second chamber 18 and via an annular channel 36 and an axially extending channel 38, the inner end of the blind bore 32 also being connected to the atmosphere via a ventilation channel 40, which in turn is related extends radially to the intermediate piece.
  • a valve spool 42 is slidably received in the blind bore 32 and is held against falling out by a snap ring 44.
  • 0-shaped sealing rings 46 and 48 are arranged in corresponding grooves 50 and 52.
  • a stem 54 extends axially from one end of valve spool 42 and receives a spring 56 via which valve spool 42 can be pressed against its snap ring 44.
  • valve slide allows pressurized gas from the second chamber 18 into the space 24 through the channel 38, the annular channel 36, the blind bore 32 and the radial channel 34, while still corresponding in the valve slide Baffles, such as axial channels are provided, which have not been shown in the drawing for the sake of simplicity.
  • the pressure in the space 24 will increase until finally the pressure differential between the space 24 and the atmosphere becomes high enough to move the valve slide 42 upward to shift the action of the spring 56.
  • the sealing ring 46 will finally sweep over the radial channel 34, the connection between the chamber 18 and the space 24 then being interrupted until the pressure in the space 24 falls far enough and the spring 56 makes it possible to move the valve slide 42 back into the position shown.
  • the pressure accumulator 110 is provided with a substantially axially extending, cylindrical intermediate piece 114, which separates the second chamber 18 from the charged space 24 with the high pressure.
  • a valve bore 120 extends radially through the intermediate piece 114, one end of the valve bore 120 being closable by a threaded plug 122.
  • the other end of the valve bore can be closed by a hollow cylindrical cap 124, which is welded to the intermediate piece 114 and extends radially outward.
  • a vent passage 126 connects the atmosphere to the interior of the cap 124.
  • a passage 128 formed as an inlet connects the valve bore 120 to the second chamber 18 which is filled with the high pressure nitrogen.
  • a valve slide 132 is displaceably arranged in the valve bore 120, as is also apparent from FIG. 2, and has in particular a stem 134 which extends into the cap, and a blind bore 136 which is axially inserted into the valve slide from one end.
  • a radial channel 138 connects the blind bore 136 to the outer surface of the valve spool 132.
  • the valve slide 132 is sealed off from the valve bore 120 via three O-shaped sealing rings 140, 142, 144, which are arranged at a distance in corresponding ring grooves in the surface of the valve slide.
  • a circlip designed as a holder 146 prevents the valve slide 132 from escaping under high pressure when the threaded plug 122 is removed during maintenance work.
  • the valve slide 132 is displaced to the right with reference to FIG. 2 via a spring 148.
  • the spring tension can be adjusted using a corresponding number of disks 151.
  • the pressure accumulator 110 is further provided with a test opening 150 for the pressure accumulator, which extends between the channel 130 and the outer surface of the intermediate piece 114. This test opening 150 is normally closed by a threaded plug 152.
  • a fastening screw 154 extends through the intermediate piece 114, via which the pressure accumulator can be arranged anywhere.
  • an additional filling opening 156 for pressurized gas is provided between the channel 128 and the outer surface of the intermediate piece 114. It is normally closed by a threaded plug 158 and allows the inlet 28 with plug 30 at one end of the housing part 12 to be dispensed with.
  • the channel 128 between the sealing rings 142 and 144 is completely sealed. If, however, the pressure in the space 24 drops and becomes too low, the spring 148 can move the valve slide 132 to the right with reference to FIG. 2, namely until the sealing ring 142 clears the channel 128 and this with the Radial channel 138 connects so that gas under high pressure between the sealing rings 140 and 142 and via the radial channel 138, the blind bore 136, the channel 130 can penetrate into the space 24.

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)
  • Electronic Switches (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Catalysts (AREA)
  • Fluid-Damping Devices (AREA)

Claims (6)

1. Accumulateur de pression (10, 110) comportant une première chambre et une seconde chambre (16, 18) un soufflet (20) placé dans la première chambre (16) divisant celle-ci en un premier compartiment et un second compartiment (22, 24), la seconde chambre (18) étant reliée à l'un des compartiments (22, 24) avec une valve prévue dans cette liaison qui s'ouvre et se ferme en fonction des conditions de pression, caractérisé en ce que la valve comporte un tiroir (42, 132) pourvu de deux faces frontales dont l'une est soumise à la pression régnant dans le compartiment (24) relié à la seconde chambre (18) et l'autre à la pression atmosphérique et est soumise à l'action d'un ressort (32, 148) déterminant la pression relative choisie dans le compartiment (22, 24) relié à la seconde chambre (18), et en ce que la pression régnant dans le compartiment (22, 24) relié à la seconde chambre (18) fait passer le tiroir (42, 132) dans la position de fermeture et la pression atmosphérique et le ressort (32, 148) font passer le tiroir dans la position d'ouverture, l'action exercée sur une face frontale s'opposant à l'action exercée sur l'autre face frontale.
2. Accumulateur de pression suivant la revendication 1, caractérisé en ce que la première chambre et la seconde chambre (16, 18) sont reliées entre elles par l'intermédiaire d'une pièce intercalaire (14, 114) dans laquelle est prévu un canal (38, 128, 130) comportant un alésage borgne (32) et reliant les chambres, l'alésage borgne (32) recevant la valve conformée en tiroir de valve (42, 132) et l'extrémité fermée de l'alésage borgne (32) étant reliée à l'atmosphère par un canal de désaérage (40, 126).
3. Accumulateur de pression suivant la revendication 1 ou 2, caractérisé en ce que la pièce intercalaire (114) est réalisée sous forme d'un cylindre s'étendant axialement comportant un alésage de valve (120) s'étendant radialement dans lequel débouche le canal (128) s'étendant axialement aboutissant à la seconde chambre (18), le canal (130) relié à l'un des compartiments (24) de la première chambre (16) étant prévu dans une direction axiale dans la pièce intercalaire (114) et débouchant dans l'alésage de valve (120) dans lequel est place le tiroir (132).
4. Accumulateur de pression suivant la revendication 3, caractérisé en ce que le tiroir (132) comporte un alésage borgne (136) disposé radialement par rapport à la pièce intercalaire (114), qui est en communication permanente avec le canal (130) relié à l'un des compartiments (24) de la première chambre (16), et un canal radial (138) disposé axialement par rapport à la pièce intercalaire qui est en communication permanente avec l'alésage borgne (136) et peut être relié, en fonction de la position du tiroir (132) déplaçable contre l'action du ressort (148), au canal (128) aboutissant à l'autre chambre (18).
5. Accumulateur de pression suivant la revendication 4, caractérisé en ce que l'alésage de valve (120) peut être obturé à l'extrémité située du côté du canal (130) relié à l'un des compartiments (24) de la première chambre (16) au moyen d'un bouchon fileté (122), et est relié à l'atmosphère par le canal de désaérage (126) à son autre extrémité.
6. Accumulateur de pression suivant une ou plusieurs des revendications précédentes, caractérisé en ce que dans le canal (130) relié à l'un des compartiments (24) de la première chambre (16) débouche une ouverture d'essai obturable (150) et dans le canal (128) aboutissant à la seconde chambre (18) une ouverture de remplissage obturable (156).
EP86105733A 1985-05-02 1986-04-25 Accumulateur avec première et seconde chambre Expired EP0202502B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105733T ATE45022T1 (de) 1985-05-02 1986-04-25 Druckspeicher mit einer ersten und einer zweiten kammer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US730005 1985-05-02
US06/730,005 US4606376A (en) 1985-05-02 1985-05-02 Accumulator with integral high pressure reservoir and recharge valve

Publications (2)

Publication Number Publication Date
EP0202502A1 EP0202502A1 (fr) 1986-11-26
EP0202502B1 true EP0202502B1 (fr) 1989-07-26

Family

ID=24933522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105733A Expired EP0202502B1 (fr) 1985-05-02 1986-04-25 Accumulateur avec première et seconde chambre

Country Status (12)

Country Link
US (1) US4606376A (fr)
EP (1) EP0202502B1 (fr)
JP (1) JPS61262203A (fr)
KR (1) KR860009241A (fr)
CN (1) CN86102876A (fr)
AR (1) AR243268A1 (fr)
AT (1) ATE45022T1 (fr)
AU (1) AU5652886A (fr)
BR (1) BR8601940A (fr)
DE (1) DE3664678D1 (fr)
DK (1) DK195786A (fr)
ES (1) ES8703591A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4674541A (en) * 1986-06-09 1987-06-23 Allied Corporation Multiple seal for a pressure vessel
JPH0260735U (fr) * 1988-10-27 1990-05-07
US6076496A (en) * 1997-08-06 2000-06-20 Technology Licensing Company Captive bag engine pre-oiling apparatus
FR2796105B1 (fr) * 1999-07-08 2001-10-12 Elf Exploration Prod Methode de charge d'un accumulateur de pression hydraulique sous-marin
US9080710B2 (en) * 2011-01-21 2015-07-14 Hamilton Sundstrand Corporation Accumulator reservoir venting
US8602063B2 (en) * 2011-02-08 2013-12-10 Hamilton Sundstrand Corporation Gas over liquid accumulator
CH708605A2 (de) * 2013-09-25 2015-03-31 Emil Bächli Emil Bächli Energietechnik Ag Pumpwasserdruck-Luftpolster-Energiespeicherung mit einstellbarem über die Druckluft regulierbarem konstantem Wasserdruck für den Turbinenantrieb.
DE102014010006A1 (de) * 2014-07-05 2016-01-07 Hydac Technology Gmbh Hydropneumatischer Druckspeicher
CN106762870A (zh) * 2016-12-29 2017-05-31 北京东方诚国际钢结构工程有限公司 一种涂胶机稳定压力源及实现方法
WO2019226748A1 (fr) 2018-05-25 2019-11-28 Graco Minnesota Inc. Suppresseur pneumatique de surtension

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320886A (en) * 1941-05-24 1943-06-01 Kieley And Mueller Inc Reducing valve
US2773455A (en) * 1953-06-25 1956-12-11 Mercier Jean Accumulator system for pressure surge relief
US2904077A (en) * 1955-11-28 1959-09-15 Rheinstahl Siegener Eisenbahnb Shock absorbers
DE1172910B (de) * 1957-07-11 1964-06-25 Olaer Patent Co Druckbehaelter
GB973413A (en) * 1959-11-04 1964-10-28 Gabriel Co Self damping load supporting strut
US3195577A (en) * 1961-11-01 1965-07-20 Greer Hydraulics Inc Fluid pressure accumulator
US3230976A (en) * 1964-05-19 1966-01-25 Mercier Jean Pressure container
DE2125661A1 (de) * 1970-05-23 1971-11-25 Pirelli Kompensationsdruckbehälter für ölgefüllte Starkstromkabel
US4195668A (en) * 1979-01-18 1980-04-01 Hydril Company High capacity pulsation dampener or surge absorber

Also Published As

Publication number Publication date
KR860009241A (ko) 1986-12-20
AR243268A1 (es) 1993-07-30
ES8703591A1 (es) 1987-02-16
DK195786A (da) 1986-11-03
DK195786D0 (da) 1986-04-29
CN86102876A (zh) 1986-10-29
ES554548A0 (es) 1987-02-16
EP0202502A1 (fr) 1986-11-26
JPS61262203A (ja) 1986-11-20
DE3664678D1 (en) 1989-08-31
BR8601940A (pt) 1987-01-06
ATE45022T1 (de) 1989-08-15
AU5652886A (en) 1986-11-06
US4606376A (en) 1986-08-19

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