EP0244044B1 - Akustisches Filter - Google Patents

Akustisches Filter Download PDF

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Publication number
EP0244044B1
EP0244044B1 EP87201090A EP87201090A EP0244044B1 EP 0244044 B1 EP0244044 B1 EP 0244044B1 EP 87201090 A EP87201090 A EP 87201090A EP 87201090 A EP87201090 A EP 87201090A EP 0244044 B1 EP0244044 B1 EP 0244044B1
Authority
EP
European Patent Office
Prior art keywords
diffuser
tube
rings
filter according
bladder
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 - Lifetime
Application number
EP87201090A
Other languages
English (en)
French (fr)
Other versions
EP0244044A3 (en
EP0244044A2 (de
Inventor
Philippe Richard
Jean-Charles Papillon
Alain Guyot
Carlo Corbellini
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0244044A2 publication Critical patent/EP0244044A2/de
Publication of EP0244044A3 publication Critical patent/EP0244044A3/fr
Application granted granted Critical
Publication of EP0244044B1 publication Critical patent/EP0244044B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F15B1/16—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means in the form of a tube
    • F15B1/165—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means in the form of a tube in the form of a 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
    • F15B2201/20—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
    • F15B2201/30—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
    • 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

Definitions

  • the present invention relates to an acoustic filter comprising a body having an inlet orifice and an outlet, a tube pierced with orifices connecting the inlet orifice to the outlet orifice of the body and intended for circulation of a liquid, a bladder made of a flexible and deformable material, said bladder surrounding the tube and delimiting an external chamber for a gas under pressure.
  • the invention solves the problem of creating a filter in which the risks of rupture of the membrane are eliminated.
  • diffuser holder assembly mounted around the tube is made of a flexible material close to that of the bladder and has orifices having a large passage cross section relative to that of the orifices of the tube.
  • diffuser holder consists of diffuser rings mounted on the tube with a spacing determined so as to leave an annular passage for the liquid between two successive diffuser rings.
  • the diffuser rings are shaped so that the annular passages existing between two successive rings are open when the pressure prevailing inside the tube is greater than the pressure outside bladder and closed otherwise.
  • each diffuser consists of a metal frame surrounded externally by an elastomer ring.
  • the frame has a male cone section, the elastomer ring having a female cone-shaped portion of larger diameter than that of the male cone.
  • each diffuser ring consists of a cylindrical metal frame surrounded externally by an elastomer ring having lips capable of approaching those of the neighboring diffuser when hydraulic pressure is exerted from the outside on said rings.
  • FIG. 1 shows an acoustic filter produced in accordance with the invention.
  • This filter is intended to be mounted in line on a pipe. It is used to absorb pressure waves caused for example by piston pumps or any other material. It includes, for example, a body 2 consisting of a cylinder 2a with relatively thick walls, at each end of which are mounted two attachment screws 2b. A notched nut is screwed onto each of the hooking screws. A hooking ring is mounted in a recess of each of the hooking screws. Inside the attachment rings there are fittings for connecting the filter to a pipe.
  • a deformable bladder 9 made of a flexible material is mounted on each of the hooking screws 2b -
  • This bladder has the shape of a cylindrical sleeve which surrounds the tube 7 and the diffuser rings 20.
  • the ends of the bladder 9 are housed in a corresponding groove hooking screws 2b.
  • the bladder 9 defines with the inner wall of the cylinder 2a a chamber 8 intended to receive a gas under pressure. This gas is introduced by means of a valve 8a mounted on the wall of the body 2a.
  • the elastomer rings 20 prevent perforation and wear of the bladder 9 while allowing free passage of a fluid, in particular a liquid circulating in the pipe to which the acoustic filter is connected.
  • a fluid in particular a liquid circulating in the pipe to which the acoustic filter is connected.
  • this fluid is subjected to pulsations, for example because it is moved by a piston pump, it penetrates as shown diagrammatically by the arrows 16 in the orifices of the tube 7 and between the diffuser rings.
  • the bladder then lifts up to occupy a position such as that designated by the reference 9 '.
  • a knurled plug 6 is screwed onto a thread of the cylinder 2a.
  • Diffuser rings 20 according to the invention are mounted on the tube 7.
  • FIG. 2 a sectional view of the acoustic filter of Figure 1.
  • the tube 7 is pierced with holes 13.
  • the diffusers, designated by the reference 20a are constituted by a frame 21a surrounded externally by a ring 23a made of elastomer.
  • Each frame 21a has a cylindrical shape of circular section. It is centered on the tube 7 of polygonal outer section. It has at one of its ends a spacer constituted, in the embodiment described, by four projections formed on the frame 21a. Of course, these spacers could also be constituted by added parts.
  • FIG 3 a perspective view and partially in section of three superimposed diffusers.
  • the diffuser rings 20a shown in the upper part of Figure 3 are seen in longitudinal section.
  • the slots 29 formed at the end of the frame 21a In the embodiment described, there are four slots 29 which determine four passages 31 for the liquid. Of course, this number could be different depending on another embodiment. One could for example provide three slots 29 only.
  • the orientation of two consecutive rings with respect to each other is indifferent.
  • the lower diffuser ring 20a shown in the lower part of Figure 3 is seen from the outside. Note the passage section left free between two consecutive rings.
  • the tube 7 has a polygonal outer section, for example square. This shape allows to clear four passages 33, between the faces of the square and the internal bore of the frame 21a. Four holes 13 located at 90 ° from each other are drilled in each of the faces of the square. Each orifice 13 opens into a passage 33. It is noted that the orientation of the diffuser ring 20a with respect to the square of the diffuser holder tube is indifferent. Indeed, whatever this orientation, there is a sufficient passage section for the liquid. The tube 7 also ensures the centering of the diffuser rings 20a on the tops of the square.
  • the outer rings 23a ( Figures 2 and 3) have a generally cylindrical shape of circular section. They have a shallow groove 23b of rounded profile on its outer surface.
  • the upper and lower faces 23c of the ring 23a form aveç the axis of the tube 7, and therefore with the axis of the diffusers, a re-entrant angle, that is to say less than 90 °. For example, this angle can be equal to 75 °.
  • the faces of two successive rings 23a move closer together and leave for the fluid an outlet space which is narrower than the inlet space as can be seen in FIGS. 2 and 3. These edges thus form a kind lip.
  • the rings 23a are made of a material which is compatible with that of the bladder, so that the latter does not wear out or deteriorate when it is applied to the outer periphery of the rings. They are made of the same material as the latter, namely elastomer.
  • elastomer rings 23a are molded directly on the tube 7, thus constituting a tube in one piece which could also be made entirely of elastomer for low pressure applications.
  • the frame 21b has a part male conical 25 connected by a round.
  • the outer ring 23b has an inner cone 27 whose diameter is larger than the diameter of the male cone 25 so as to leave a space between these two cones when the rings are mounted on the tube 7.
  • the spacing between two successive rings is ensured by means of slots 29 made on the terminal part of the frame. The liquid flows through the space left free between the spacers 29.
  • the tube 7 causes a low pressure drop. It is unclogged. It does not filter the impurities which can be contained in the liquid, due to the large passage section offered to the fluid. It brings the fluid into the bladder 9 at reduced speed; it does not act as a filter or an oil trap; it supports without permanent deformation and without degradation of fluid / fluid back pressures greater than 250 bars; it does not cause any deterioration in the bladder when the latter is applied to the tube under the effect of a back pressure greater than 250 bars.

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)
  • Pipe Accessories (AREA)

Claims (9)

  1. Akustisches Filter mit einem Körper (2) mit einer Eingangsöffnung (5) und einer Ausgangsöffnung (5), einem Rohr (7), das von Öffnungen (13) durchbohrt ist, den Eingang mit dem Ausgang des körpers (2) verbindet und zur Zirkulation einer Flüssigkeit bestimmt ist, einer Base (9) aus einem weichen und verformbaren Material wobei die Blase (9) das Rohr (7) umgibt und eine äußere Kammer (8) für ein unter Druck stehendes Gas begrenzt, dadurch gekennzeichnet, daß es eine Diffusionsarordnung aufweist die Diffusionsringe (20, 20a, 20b) die auf dem Rohr (7) mit einem vorgegebenen Abstand so montiert sind, daß sie eine ringförmige Durchgangsöffnung (19) für eine Flüssigkeit zwischen zwei aufeinanderfolgenden Diffusionsringen lassen, wobei die Diffusionsanordnung gegenüber der Blase in einem weichen, dem der Blase (9) verwandten Material ausgeführt ist und Durchgangsöffnungen (19) mit einem großen Durchgangsquerschnitt verglichen mit dem der Öffnungen (13) des Rohrs besitzt.
  2. Filter nach Anspruch 1, dadurch gekennzeichnet, daß die Diffusionsringe (20a, 20b) so geformt sind, daß die ringförmigen Durchgangsöffnungen, die zwischen zwei aufeinanderfolgenden Ringen bestehen, geöffnet sind, wenn der im Inneren des Rohres (7) herrschende Druck gleich dem Druck außerhalb der Blase (9) ist, und geschlossen sind, wenn der Gasdruck den Druck der Flüssigkeit überschreitet
  3. Filter nach Anspruch 1, dadurch gekennzeichnet, daß jeder Diffusionsring (20a, 20b) sich aus einer Bewehrung (21a, 21 zusammensetzt, die außen von einem Ring (23a) aus einem Elastomer umgeben ist
  4. Filter nach Anspruch 3, dadurch gekennzeichnet, daß die Bewehrung (21b) einer Querschnitt eines männlichen Kegels aufweist, während der Ring aus einen Elastomer einem Teil (27) in der Form eines weiblichen Kegels mit größerem Durchmesser als der des männlichen Kegels (25) aufweist.
  5. Filter nach Anspruch 3, dadurch gekennzeichnet, daß Jeder Diffusionsring (20a) sich aus einer zylinderförmigen Bewehrung (21a) zusammensetzt, die außen von einem Ring aus einem Elastomer (23a) umgeben ist, der Lippen aufweist, die geeignet sind sich denen des benachbarten Diffusionsrings zu nähern, wenn ein hydraulischer Druck von außen auf die Ringe (23a) ausgeübt wird.
  6. Filter nach Anspruch 3, dadurch gekennzeichnet, daß es einen Kollektor (33) aufweist, der das Rohr (7) umgibt, um die Öffnungen (13) mit den Durchgangsöffnungen der Diffusionsringe in Verbindung zu bringen.
  7. Filter nach Anspruch 1, dadurch gekennzeichnet, daß das Rohr (7) einen äußeren, polygonalen Querschnitt aufweist, wobei eine Öffnung (13) In jede Fläche dieses Polygons auf der Höhe der Verbindung von zwei aufeinander folgenden Diffusionsringen (20) gebohrt ist.
  8. Filter nach Anspruch 1 dadurch gekennzeichnet, daß der Abstand zwischen zwei aufeinanderfolgenden Diffusionsringen aufgrund von Abstandsstücken (29), die am Ende der Armierung (21a, 21b) gebildet sind, aufrecht erhalten wird.
  9. Filter nach Anspruch 2, dadurch gekennzeichnet, daß die Ringe aus einem Elasomer (23a) Lippen aufweisen, die geeignet sind, sich denen des benachbarten Rings zu nähern, wenn ein Druck von außen auf die Ringe (23a) ausgeübt wird, und daß sie auf das Rohr (7) geformt sind.
EP87201090A 1983-08-04 1984-07-27 Akustisches Filter Expired - Lifetime EP0244044B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8312895A FR2550283B1 (fr) 1983-08-04 1983-08-04 Accumulateur hydropneumatique
FR8312895 1983-08-04

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP84401586A Division-Into EP0134738B1 (de) 1983-08-04 1984-07-27 Hydropneumatischer Speicher
EP84401586A Division EP0134738B1 (de) 1983-08-04 1984-07-27 Hydropneumatischer Speicher

Publications (3)

Publication Number Publication Date
EP0244044A2 EP0244044A2 (de) 1987-11-04
EP0244044A3 EP0244044A3 (en) 1988-10-12
EP0244044B1 true EP0244044B1 (de) 1991-05-08

Family

ID=9291409

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84401586A Expired EP0134738B1 (de) 1983-08-04 1984-07-27 Hydropneumatischer Speicher
EP87201090A Expired - Lifetime EP0244044B1 (de) 1983-08-04 1984-07-27 Akustisches Filter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84401586A Expired EP0134738B1 (de) 1983-08-04 1984-07-27 Hydropneumatischer Speicher

Country Status (5)

Country Link
US (2) US4638838A (de)
EP (2) EP0134738B1 (de)
JP (1) JPS6053201A (de)
DE (2) DE3484568D1 (de)
FR (1) FR2550283B1 (de)

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US7806419B1 (en) 2005-10-28 2010-10-05 Howard Durrell U Steer wheel control system with reciprocating cylinder
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DE102007012527A1 (de) * 2007-03-15 2008-09-18 Alpha Fluid Hydrauliksysteme Müller GmbH Diffusorbaugruppe
DE102008061221A1 (de) * 2008-12-09 2010-06-10 Hydac Technology Gmbh Hydrospeicher, insbesondere Balgspeicher
DE102010025627A1 (de) 2010-06-30 2012-01-05 Hydac Technology Gmbh Hydropneumatischer Blasenspeicher
WO2012053949A1 (en) * 2010-10-20 2012-04-26 Värmebaronen Ab Flow control
JP5863298B2 (ja) 2011-07-08 2016-02-16 株式会社リブドゥコーポレーション 吸収性物品用シート部材製造装置
US9352251B2 (en) * 2014-03-12 2016-05-31 Newkota Services and Rentals, LLC Open top tank with tandem diffusers
DK178247B1 (en) * 2014-03-14 2015-10-05 Eyecular Technologies Aps Inlet stratification device
US9683700B2 (en) * 2014-05-20 2017-06-20 Steelhead Composites, Llc. Metallic liner pressure vessel comprising polar boss
JP6560098B2 (ja) * 2015-10-27 2019-08-14 古河ロックドリル株式会社 油圧ダウンザホールドリルのアキュムレータ
FR3074541B1 (fr) * 2017-12-01 2019-10-18 Safran Aircraft Engines Accumulateur integre a une canalisation de carburant
EP4242105B1 (de) * 2022-03-11 2025-08-20 Airbus Operations GmbH Ein wasserversorgungssystem für ein flugzeug, umfassend ein puffer zum speichern von flüssigkeit unter verbraucherdruck
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Also Published As

Publication number Publication date
EP0244044A3 (en) 1988-10-12
FR2550283A1 (fr) 1985-02-08
EP0134738A2 (de) 1985-03-20
DE3471979D1 (en) 1988-07-14
EP0134738A3 (en) 1985-07-10
US4768616A (en) 1988-09-06
FR2550283B1 (fr) 1988-03-18
JPS6053201A (ja) 1985-03-26
DE3484568D1 (de) 1991-06-13
EP0244044A2 (de) 1987-11-04
US4638838A (en) 1987-01-27
EP0134738B1 (de) 1988-06-08

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