EP0244044A2 - Acoustic filter - Google Patents

Acoustic filter Download PDF

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Publication number
EP0244044A2
EP0244044A2 EP87201090A EP87201090A EP0244044A2 EP 0244044 A2 EP0244044 A2 EP 0244044A2 EP 87201090 A EP87201090 A EP 87201090A EP 87201090 A EP87201090 A EP 87201090A EP 0244044 A2 EP0244044 A2 EP 0244044A2
Authority
EP
European Patent Office
Prior art keywords
tube
diffuser
rings
filter according
ring
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
EP87201090A
Other languages
German (de)
French (fr)
Other versions
EP0244044B1 (en
EP0244044A3 (en
Inventor
Philippe Richard
Jean-Charles Papillon
Alain Guyot
Carlo Corbellini
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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Publication date
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Publication of EP0244044A2 publication Critical patent/EP0244044A2/en
Publication of EP0244044A3 publication Critical patent/EP0244044A3/en
Application granted granted Critical
Publication of EP0244044B1 publication Critical patent/EP0244044B1/en
Anticipated expiration legal-status Critical
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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 a 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.
  • the 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.
  • the diffuser holder assembly is made up of diffuser rings mounted on the tube with a spacing determined so as to leave an annular passage for a fluid between two successive diffuser rings.
  • the advantages obtained thanks to this invention essentially consist in that the bladder does not deteriorate when it is in contact with the diffuser holder assembly. On the other hand, a large passage section is provided for the liquid.
  • 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 part 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 comprises 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 knurled plug 6 is screwed onto a thread of the cylinder 2a.
  • a tube called a diffuser tube, connects the fitting located at the left end of the figure to the fitting located at the right end.
  • Diffuser rings 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 elastometer.
  • 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 relative 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 an outlet space for the fluid 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 out the impurities that may 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.

Abstract

Il comprend un corps (2a) présentant un orifice d'entrée et un orifice de sortie (5), un tube (7) percé d'orifices reliant l'entrée à la sortie du corps (2a) et destiné à la circulation d'un liquide, une vessie (9) réalisée en une matière souple et déformable, ladite vessie (9) entourant le tube (7) et délimitant une chambre externe pour un gaz sous pression. Un ensemble diffuseur est monté autour du tube (7), ledit ensemble diffuseur étant réalisé en un matériau souple voisin de celui de la vessie et comportant des orifices ayant une section de passage importante relativement à celle des orifices du tube (7).It comprises a body (2a) having an inlet orifice and an outlet (5), a tube (7) pierced with orifices connecting the inlet to the outlet of the body (2a) and intended for the circulation of a liquid, a bladder (9) made of a flexible and deformable material, said bladder (9) surrounding the tube (7) and delimiting an external chamber for a gas under pressure. A diffuser assembly is mounted around the tube (7), said diffuser assembly being made of a flexible material close to that of the bladder and comprising orifices having a large passage cross section relative to that of the orifices of the tube (7).

Description

La présente invention a pour objet un filtre acoustique comprenant un corps présentant un orifice d'entrée et un orifice de sortie, un tube percé d'ori­fices reliant l'orifice d'entrée à l'orifice de sortie du corps et destiné à la circulation d'un liquide, une vessie réalisée en une matière souple et déforma­ble, ladite vessie entourant le tube et délimitant une chambre pour un gaz sous pression.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 a chamber for a gas under pressure.

Ces dispositifs présentent des inconvénients. Tout d'abord il existe des risques de colmatage. En outre, ils impliquent des risques de rupture de la vessie par extrusion de l'élastomère au travers des perçages du tube central lorsque le circuit hydraulique est décomprimé.These devices have drawbacks. First of all there are risks of clogging. In addition, they involve risks of rupture of the bladder by extrusion of the elastomer through the holes in the central tube when the hydraulic circuit is decompressed.

L'invention résout le problème consistant à créer un filtre dans lequel les risques de rupture de la membrane sont éliminés.The invention solves the problem of creating a filter in which the risks of rupture of the membrane are eliminated.

Ce résultat est obtenu grâce au fait que l'ensemble porte-diffuseurs monté autour du tube est réalisé en un matériau souple voisin de celui de la vessie et comporte des orifices ayant une section de passage importante relativement à celle des orifices du tube.This result is obtained by the fact that the 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.

De préférence, l'ensemble porte-diffuseurs est constitué de bagues de diffuseur montées sur le tube avec un écartement déterminé de manière à laisser un passage annulaire pour un fluide entre deux bagues de diffuseur successives.Preferably, the diffuser holder assembly is made up of diffuser rings mounted on the tube with a spacing determined so as to leave an annular passage for a fluid between two successive diffuser rings.

Les avantages obtenus grâce à cette invention consistent essentiellement en ce que la vessie ne se détériore pas lorsqu'elle est en contact avec l'ensemble porte-diffuseurs. D'autre part, une section de passage importante est ménagée pour le liquide.The advantages obtained thanks to this invention essentially consist in that the bladder does not deteriorate when it is in contact with the diffuser holder assembly. On the other hand, a large passage section is provided for the liquid.

En outre, selon une caractéristique particu­lière de l'invention, les bagues de diffuseur sont conformées de manière que les passages annulaires existant entre deux bagues successives sont ouverts lorsque la pression régnant à l'intérieur du tube est supérieure à la pression à l'extérieur de la vessie et fermés dans le cas contraire.In addition, according to a particular characteristic of the invention, 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.

De préférence encore, chaque diffuseur se compose d'une armature métallique entourée extérieu­rement d'une bague en élastomère.More preferably, each diffuser consists of a metal frame surrounded externally by an elastomer ring.

Selon une première réalisation particulière, l'armature présente une section de cône mâle, la bague en élastomère présentant une partie en forme de cône femelle de plus grand diamètre que celui du cône mâle.According to a first particular embodiment, the frame has a male cone section, the elastomer ring having a female cone-shaped part of larger diameter than that of the male cone.

Selon une seconde réalisation particulière, chaque bague de diffuseur se compose d'une armature métallique cylindrique entourée extérieurement d'une bague en élastomère présentant des lèvres susceptibles de se rapprocher de celles du diffuseur voisin lorsqu'une pression hydraulique est exercée de l'extérieur sur lesdites bagues.According to a second particular embodiment, 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.

L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement un mode d'exécution.

  • - La figure 1 est une vue d'ensemble, par­tiellement en coupe d'un filtre acoustique réalisé conformément à l'invention.
  • - La figure 2 représente une vue en coupe à échelle agrandie d'une partie d'extrémité du filtre acoustique conforme à l'invention représenté sur la figure 1.
  • - La figure 3 est une vue en perspective, à échelle agrandie, de bagues faisant partie du mode d'exécution des figures 1 et 2.
  • - La figure 4 représente une vue en coupe, d'une partie d'extrémité d'un second mode d'exécution d'un filtre acoustique conforme à l'invention.
The invention is set out below in more detail with the aid of drawings representing only one embodiment.
  • - Figure 1 is an overall view, partially in section of an acoustic filter produced in accordance with the invention.
  • FIG. 2 represents a sectional view on an enlarged scale of an end part of the acoustic filter according to the invention represented in FIG. 1.
  • FIG. 3 is a perspective view, on an enlarged scale, of rings forming part of the embodiment of FIGS. 1 and 2.
  • - Figure 4 shows a sectional view of an end portion of a second embodiment of an acoustic filter according to the invention.

On a représenté sur la figure 1 un filtre acoustique réalisé conformément à l'invention. Ce filtre est destiné à être monté en ligne sur une tuyauterie. Il sert à amortir les ondes de pression provoquées par exemple par des pompes à piston ou tout autre matériel. Il comporte à titre d'exemple un corps 2 constitué d'un cylindre 2a à parois relati­vement épaisses, à chacune des extrémités duquel sont montées deux vis d'accrochage 2b. Un écrou à encoches est vissé sur chacune des vis d'accrochage. Une bague d'accrochage est montée dans un évidement de chacune des vis d'accrochage. A l'intérieur des bagues d'accrochage se trouvent des raccords destinés à raccorder le filtre à une tuyauterie.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. By way of example, it comprises 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 chaque extrémité, un bouchon moleté 6 est vissé sur un filetage du cylindre 2a. Un tube, appelé tube porte-diffuseurs, relie le raccord situé à l'extrémité gauche de la figure au raccord situé à l'extrémité droite. Des bagues de diffuseurs confor­mes à l'invention sont montées sur le tube 7.At each end, a knurled plug 6 is screwed onto a thread of the cylinder 2a. A tube, called a diffuser tube, connects the fitting located at the left end of the figure to the fitting located at the right end. Diffuser rings according to the invention are mounted on the tube 7.

On a représenté sur la figure 2 une vue en coupe du filtre acoustique de la figure 1. Le tube 7 est percé d'orifices 13. Les diffuseurs, dési­gnés par la référence 20a, sont constitués par une armature 21a entourée extérieurement par une bague 23a en élastomètre. Chaque armature 21a présente une forme cylindrique de section circulaire. Elle est centrée sur le tube 7 de section extérieure poly­gonale. Elle présente à l'une de ses extrémités un espaceur constitué, dans l'exemple de réalisation décrit, par quatre saillies formées sur l'armature 21a. Bien entendu, ces espaceurs pourraient également être constitués par des pièces rapportées.There is shown in Figure 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 elastometer. 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.

On a représenté sur la figure 3 une vue en perspective et partiellement en coupe de trois diffuseurs superposés. Les bagues de diffuseurs 20a représentées à la partie supérieure de la figure 3 sont vues en coupe longitudinale. On remarque en particulier les créneaux 29 formés à l'extrémité de l'armature 21a. Dans l'exemple de réalisation décrit, il y a quatre créneaux 29 qui déterminent quatre passages 31 pour le liquide. Bien entendu, ce nombre pourrait être différent selon une autre réalisation. On pourrait par exemple prévoir trois créneaux 29 seulement. On remarque également que l'orientation de deux bagues consécutives l'une par rapport à l'autre est indifférente.There is shown in Figure 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. We note in particular 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. We also note that the orientation of two consecutive rings with respect to each other is indifferent.

La bague de diffuseur inférieur 20a repré­sentée à la partie inférieure de la figure 3 est vue de l'extérieur. On remarque la section de passage laissée libre entre deux bagues consécutives.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.

Afin de mettre en communication les orifices 13 réalisés dans le tube 7 avec les orifices de passage qui existent entre deux diffuseurs 20a successifs, il est nécessaire d'aménager un collecteur entourant le tube porte-diffuseurs. Le tube 7 présente une section extérieure polygonale, par exemple carrée. Cette forme permet de dégager quatre passages 33, entre les faces du carré et l'alésage interne de l'armature 21a. Quatre orifices 13 situés à 90° l'un de l'autre sont percés dans chacune des faces du carré. Chaque orifice 13 débouche dans un passage 33. On remarque que l'orientation de la bague de diffuseur 20a par rapport au carré du tube porte-diffu­seurs est indifférente. En effet, quelle que soit cette orientation, il existe une section de passage suffisante pour le liquide. Le tube 7 assure par ailleurs le centrage des bagues de diffuseurs 20a sur les sommets du carré.In order to put the orifices 13 made in the tube 7 into communication with the passage orifices which exist between two successive diffusers 20a, it is necessary to arrange a manifold surrounding the diffuser carrier tube. 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 relative 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.

Les bagues extérieures 23a (figures 2 et 3) présentent une forme générale cylindrique de section circulaire. Elles présentent une gorge peu profonde 23b de profil arrondi sur sa surface extérieure. Les faces supérieure et inférieure 23c de la bague 23a forment aveç l'axe du tube 7, et par conséquent avec l'axe des diffuseurs, un angle rentrant, c'est-à-­dire inférieur à 90°. A titre d'exemple, cet angle peut être égal à 75°. Ainsi les faces de deux bagues 23a successives vont en se rapprochant et laissent pour le fluide un espace de sortie qui est plus étroit que l'espace d'entrée comme on peut le voir sur les figures 2 et 3. Ces arêtes forment ainsi un genre de lèvre.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 °. Thus the faces of two successive rings 23a move closer together and leave an outlet space for the fluid which is narrower than the inlet space as can be seen in FIGS. 2 and 3. These edges thus form a kind lip.

Les bagues 23a sont réalisées en un matériau qui est compatible avec celui de la vessie, de manière à ce que cette dernière ne s'use pas ou ne se détériore pas lorsqu'elle est appliquée sur le pourtour extérieur des bagues. Elles sont réalisées dans le même matériau que cette dernière, à savoir en élastomère.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.

Dans le mode de réalisation des figures 2 et 3, l'espace laissé libre pour le fluide se referme lorsqu'une contre-pression gaz est appliquée sur la vessie. La nature des matériaux en présence permet d'éviter le poinçonnage de la vessie de telle sorte que cette dernière peut supporter une contre-pression fluide/fluide supérieure à 250 bars.In the embodiment of Figures 2 and 3, the space left free for the fluid closes when a gas back pressure is applied to the bladder. The nature of the materials present makes it possible to avoid punching the bladder so that the latter can withstand a fluid / fluid back pressure greater than 250 bars.

Selon la variante de réalisation de la figure 4, des bagues en élastomère 23a sont moulées directement sur le tube 7, constituant ainsi un tube en une seule pièce qui pourrait également être réalisé entièrement en élastomère pour des applications basse pression.According to the alternative embodiment of Figure 4, 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.

Selon le mode de réalisation représenté sur la figure 5, l'armature 21b comporte une partie conique mâle 25 raccordée par un arrondi. La bague extérieure 23b comporte un cône intérieur 27 dont le diamètre est plus grand que le diamètre du cône mâle 25 de manière à laisser subsister un espace entre ces deux cônes lorsque les bagues sont montées sur le tube 7. L'espacement entre deux bagues succes­sives est assuré au moyen de créneaux 29 réalisés sur la partie terminale de l'armature. Le liquide s'écoule par l'espace laissé libre entre les espaceurs 29.According to the embodiment shown in Figure 5, 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.

Les avantages de la présente invention sont les suivants :
    le tube 7 provoque une perte de charge faible. Il est incolmatable. Il ne filtre pas les impuretés qui peuvent être contenues dans le liquide, en raison de la section de passage importante offerte au fluide. Il amène le fluide dans la vessie 9 à vitesse réduite ; il ne joue pas le rôle de filtre ou de piège à huile ; il supporte sans déformation permanente et sans dégradation des contre-pressions fluide/fluide supérieures à 250 bars ; il ne provoque aucune détérioration dans la vessie lorsque celle-ci est appliquée sur le tube sous l'effet d'une contre-pression supérieure à 250 bars.The advantages of the present invention are as follows:
the tube 7 causes a low pressure drop. It is unclogged. It does not filter out the impurities that may 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.

Claims (11)

1. Filtre acoustique comprenant un corps (2a) présentant un orifice d'entrée et un orifice de sortie (5), un tube (7) percé d'orifices reliant l'entrée à la sortie du corps (2a) et destiné à la circulation d'un liquide, une vessie (9) réalisée en une matière souple et déformable, ladite vessie (9) entourant le tube (7) et délimitant une chambre externe pour un gaz sous pression, caractérisé en ce qu'il comporte un ensemble diffuseur monté autour du tube (7), ledit ensemble diffuseur étant réalisé en un matériau souple voisin de celui de la vessie et comportant des orifices ayant une section de passage importante relativement à celle des orifices du tube (7).1. Acoustic filter comprising a body (2a) having an inlet orifice and an outlet (5), a tube (7) pierced with orifices connecting the inlet to the outlet of the body (2a) and intended for the circulation of a liquid, a bladder (9) made of a flexible and deformable material, said bladder (9) surrounding the tube (7) and delimiting an external chamber for a gas under pressure, characterized in that it comprises an assembly diffuser mounted around the tube (7), said diffuser assembly being made of a flexible material close to that of the bladder and comprising orifices having a large passage cross section relative to that of the orifices of the tube (7). 2. Filtre selon la revendication 1, caracté­risé en ce que l'ensemble porte-diffuseurs est consti­tué de bagues de diffuseur (20a, 20b) montées sur le tube (7) avec un écartement déterminé de manière à laisser un passage annulaire pour un fluide entre deux bagues de diffuseur successives.2. Filter according to claim 1, characterized in that the diffuser holder assembly consists of diffuser rings (20a, 20b) mounted on the tube (7) with a spacing determined so as to leave an annular passage for a fluid between two successive diffuser rings. 3. Filtre selon la revendication 2, caracté­risé en ce que les bagues de diffuseur (20a, 20b) sont conformées de manière que les passages annulaires existant entre deux bagues successives sont ouverts lorsque la pression régnant à l'intérieur du tube (7) est égale à la pression à l'extérieur de la vessie (9) et fermés lorsque la pression du gaz dépasse la pression du liquide.3. Filter according to claim 2, characterized in that the diffuser rings (20a, 20b) are shaped so that the annular passages existing between two successive rings are open when the pressure prevailing inside the tube (7) is equal to the pressure outside the bladder (9) and closed when the gas pressure exceeds the liquid pressure. 4. Filtre selon la revendication 2, caracté­risé en ce que chaque bague de diffuseur (20a, 20b) se compose d'une armature (21a, 21b) entourée extérieu­rement d'une bague (23a) en élastomère.4. Filter according to claim 2, characterized in that each diffuser ring (20a, 20b) consists of a frame (21a, 21b) externally surrounded by a ring (23a) made of elastomer. 5. Filtre selon la revendication 4, caracté­risé en ce que l'armature (21b) présente une section de cône mâle, la bague en élastomère présentant une partie (27) en forme de cône femelle de plus grand diamètre que celui du cône mâle (25).5. Filter according to claim 4, characterized in that the frame (21b) has a section male cone, the elastomer ring having a part (27) in the form of a female cone of larger diameter than that of the male cone (25). 6. Filtre selon la revendication 4, caracté­risé en ce que chaque bague de diffuseur (20a) se compose d'une armature (21a) cylindrique entourée extérieurement d'une bague en élastomère (23a) présen­tant des lèvres susceptibles de se rapprocher de celles du diffuseur voisin lorsqu'une pression hydrau­lique est exercée de l'extérieur sur lesdites bagues (23a).6. Filter according to claim 4, characterized in that each diffuser ring (20a) consists of a cylindrical frame (21a) surrounded externally by an elastomer ring (23a) having lips capable of approaching those of the neighboring diffuser when hydraulic pressure is exerted from the outside on said rings (23a). 7. Filtre selon la revendication 4, caracté­risé en ce qu'il comporte un collecteur (33) entourant le tube (7) pour mettre en communication les orifices (13) avec les orifices de passage des bagues de diffu­seur.7. Filter according to claim 4, characterized in that it comprises a manifold (33) surrounding the tube (7) for placing the orifices (13) in communication with the orifices for the passage of the diffuser rings. 8. Filtre selon la revendication 2, caracté­risé en ce que le tube (7) présente une section exté­rieure polygonale, un orifice (13) étant percé sur chaque face de ce polygone au niveau du raccordement de deux bagues de diffuseur (20) successives.8. Filter according to claim 2, characterized in that the tube (7) has a polygonal outer section, an orifice (13) being drilled on each face of this polygon at the connection of two successive diffuser rings (20). 9. Filtre selon la revendication 2, caracté­risé en ce que l'écartement entre deux diffuseurs successifs est maintenu grâce à des espaceurs (29) formés à l'extrémité de l'armature (21a, 21b).9. Filter according to claim 2, characterized in that the spacing between two successive diffusers is maintained by means of spacers (29) formed at the end of the frame (21a, 21b). 10. Filtre selon la revendication 2, caracté­risé en ce que la bague extérieure (23) de la bague de diffuseur (20) est en élastomère.10. Filter according to claim 2, characterized in that the outer ring (23) of the diffuser ring (20) is made of elastomer. 11. Filtre selon la revendication 3, caracté­risé en ce que les bagues en élastomère (23a) présen­tent des lèvres susceptibles de se rapporcher de celles de la bague voisine lorsqu'une pression est exercée de l'extérieur sur lesdites bagues (23a)et sont moulées sur le tube (7).11. Filter according to claim 3, characterized in that the elastomer rings (23a) have lips capable of approaching those of the neighboring ring when pressure is exerted from the outside on said rings (23a) and are molded on the tube (7).
EP87201090A 1983-08-04 1984-07-27 Acoustic filter Expired - Lifetime EP0244044B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8312895 1983-08-04
FR8312895A FR2550283B1 (en) 1983-08-04 1983-08-04 HYDROPNEUMATIC ACCUMULATOR

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP84401586A Division EP0134738B1 (en) 1983-08-04 1984-07-27 Hydropneumatic accumulator
EP84401586A Division-Into EP0134738B1 (en) 1983-08-04 1984-07-27 Hydropneumatic accumulator

Publications (3)

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

Family

ID=9291409

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Application Number Title Priority Date Filing Date
EP84401586A Expired EP0134738B1 (en) 1983-08-04 1984-07-27 Hydropneumatic accumulator
EP87201090A Expired - Lifetime EP0244044B1 (en) 1983-08-04 1984-07-27 Acoustic filter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84401586A Expired EP0134738B1 (en) 1983-08-04 1984-07-27 Hydropneumatic accumulator

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9446570B2 (en) 2011-07-08 2016-09-20 Livedo Corporation Sheet article manufacturing apparatus

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610369A (en) * 1985-10-07 1986-09-09 Mercier Jacques H Pressure vessel
JPH0645681Y2 (en) * 1987-04-07 1994-11-24 宣行 杉村 Accumulator with nest inside bladder
US4872486A (en) * 1987-04-07 1989-10-10 Nobuyuki Sugimura Accumulator having inclined communication holes
US4949750A (en) * 1988-10-28 1990-08-21 Peerless Manufacturing Company Surge reliever relief valve
JPH0398395U (en) * 1990-01-26 1991-10-11
IT1261305B (en) * 1993-06-22 1996-05-14 Gevipi Ag VIBRATION AND NOISE DAMPING DEVICE, FOR HYDRAULIC SYSTEMS
US5584512A (en) * 1993-10-07 1996-12-17 Carstensen; Kenneth J. Tubing interconnection system with different size snap ring grooves
US5536028A (en) * 1994-09-28 1996-07-16 Howard; Durrell U. Power centering compensator for vehicle steering systems
EP0918969B1 (en) * 1996-08-26 2001-05-16 Eaton Aeroquip Inc. Noise suppressor for hydraulic systems
US6131613A (en) * 1996-08-26 2000-10-17 Aeroquip Corporation Noise suppressor
DE19747158A1 (en) * 1997-10-24 1999-04-29 Wolf Woco & Co Franz J Pulsation damper
FR2772099B1 (en) * 1997-12-05 2000-02-25 Peugeot MEMBRANE SPHERE OR ACCUMULATOR, FOR EXAMPLE FOR A HYDROPNEUMATIC SUSPENSION OF A MOTOR VEHICLE
US6483778B1 (en) 1999-04-02 2002-11-19 Raytheon Company Systems and methods for passively compensating transducers
DE60022375T2 (en) * 1999-10-11 2006-06-22 Silentor Holding A/S MUFFLER
US6267395B1 (en) 1999-10-18 2001-07-31 Durrell U. Howard Vehicle steering compensator with air actuated trim mechanism
US6860296B2 (en) * 2001-06-27 2005-03-01 Winston B. Young High flow nozzle system for flow control in bladder surge tanks
US6478052B1 (en) * 2001-07-25 2002-11-12 Jeff Alan Conley Pulsation damping assembly and method
US6530585B1 (en) 2001-11-16 2003-03-11 Durrell U Howard Vehicle steering stabilizer with detent ramp in rotary plate
US6817620B1 (en) 2002-08-02 2004-11-16 Durrell U Howard Precision steer wheel control system with internal solenoid
US7207580B2 (en) * 2002-08-02 2007-04-24 Howard Durrell U Precision steer wheel control system with remote trim valve assembly
DE10241883B4 (en) * 2002-09-10 2012-06-21 Andreas Stihl Ag & Co. Hand-held implement with a mounting pin for an exhaust silencer
US6935460B2 (en) * 2003-05-21 2005-08-30 Airsep Corporation Noise muffler for oxygen concentrator
US7278514B1 (en) * 2003-10-17 2007-10-09 The United States Of America As Represented By The Secretary Of The Navy Acoustic noise filter
SE526992C2 (en) * 2004-03-12 2005-12-06 Atlas Copco Constr Tools Ab Hydraulic pressure accumulator
US20070056649A1 (en) * 2005-09-09 2007-03-15 Chang Hsu P Pressure container with replaceable bellows
US7219908B1 (en) 2005-10-28 2007-05-22 Howard Durrell U Steer wheel control system with stationary piston and reciprocating cylinder
US7806419B1 (en) 2005-10-28 2010-10-05 Howard Durrell U Steer wheel control system with reciprocating cylinder
US7472720B2 (en) * 2006-10-30 2009-01-06 Young Engineering & Manufacturing, Inc. High flow nozzle system for flow control in bladder surge tanks
DE102007012527A1 (en) * 2007-03-15 2008-09-18 Alpha Fluid Hydrauliksysteme Müller GmbH Fluid exchanging device, has distributor connecting directly to fluid tube, in which total fluid flow is partitioned into partial flows flowing into assigned delay assembly and leaking out into fluid tank in retarded manner
DE102008061221A1 (en) * 2008-12-09 2010-06-10 Hydac Technology Gmbh Hydraulic accumulator, in particular bellows accumulator
DE102010025627A1 (en) * 2010-06-30 2012-01-05 Hydac Technology Gmbh Hydropneumatic bladder accumulator
PL2630414T3 (en) * 2010-10-20 2016-09-30 Flow control
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
FR3074541B1 (en) * 2017-12-01 2019-10-18 Safran Aircraft Engines ACCUMULATOR INTEGRATED WITH A FUEL PIPING
US11953154B2 (en) 2022-04-22 2024-04-09 Amtrol Licensing Inc. Method and system for pressure relief in a multi chamber vessel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR942447A (en) * 1943-08-16 1949-02-08 Further training in energy storage and similar devices
US2760518A (en) * 1953-11-30 1956-08-28 William H Peet Accumulator
US2764537A (en) * 1954-03-31 1956-09-25 Stillman Rubber Co Composite article and method of manufacture
US2874721A (en) * 1956-02-23 1959-02-24 Mercier Jean Liquid port for pressure accumulator
US3115162A (en) * 1959-07-16 1963-12-24 American Metal Prod Accumulator
US3741250A (en) * 1970-10-28 1973-06-26 J Mercier Pressure vessel
US3744527A (en) * 1971-08-13 1973-07-10 J Mercier Pulse damper unit for hydraulic system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR73894E (en) * 1958-07-30 1960-09-12 Improvements to fluid enclosures that can be pressurized and include a separator
US3161208A (en) * 1959-04-30 1964-12-15 Mercier Jean Pressure vessels
US3165166A (en) * 1963-12-05 1965-01-12 White Evans Elevator Co Inc Silencer device for hydraulic jacks
FR1408181A (en) * 1964-01-24 1965-08-13 Olaer Patent Co Guide element for flexible separator in a pressure tank
US3279499A (en) * 1964-11-06 1966-10-18 Mercier Jean Pressure vessels
DE1525485A1 (en) * 1966-02-17 1969-08-14 Jean Mercier Pressure vessel with a flexible partition
FR1487445A (en) * 1966-05-25 1967-07-07 Citroen Sa Andre Improvements to hydraulic diaphragm accumulators
FR1533447A (en) * 1967-06-09 1968-07-19 Valve
US4497388A (en) * 1981-08-25 1985-02-05 Gaulin Corporation Pulsation dampener and acoustic attenuator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR942447A (en) * 1943-08-16 1949-02-08 Further training in energy storage and similar devices
US2760518A (en) * 1953-11-30 1956-08-28 William H Peet Accumulator
US2764537A (en) * 1954-03-31 1956-09-25 Stillman Rubber Co Composite article and method of manufacture
US2874721A (en) * 1956-02-23 1959-02-24 Mercier Jean Liquid port for pressure accumulator
US3115162A (en) * 1959-07-16 1963-12-24 American Metal Prod Accumulator
US3741250A (en) * 1970-10-28 1973-06-26 J Mercier Pressure vessel
US3744527A (en) * 1971-08-13 1973-07-10 J Mercier Pulse damper unit for hydraulic system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9446570B2 (en) 2011-07-08 2016-09-20 Livedo Corporation Sheet article manufacturing apparatus

Also Published As

Publication number Publication date
JPS6053201A (en) 1985-03-26
EP0244044B1 (en) 1991-05-08
DE3484568D1 (en) 1991-06-13
FR2550283B1 (en) 1988-03-18
DE3471979D1 (en) 1988-07-14
EP0134738A2 (en) 1985-03-20
FR2550283A1 (en) 1985-02-08
US4638838A (en) 1987-01-27
EP0134738B1 (en) 1988-06-08
EP0244044A3 (en) 1988-10-12
EP0134738A3 (en) 1985-07-10
US4768616A (en) 1988-09-06

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