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FR2529290A1 - Pressure surge damper for pumping system - has two pressurised diaphragm chambers at pump discharge - Google Patents

Pressure surge damper for pumping system - has two pressurised diaphragm chambers at pump discharge Download PDF

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Publication number
FR2529290A1
FR2529290A1 FR8211222A FR8211222A FR2529290A1 FR 2529290 A1 FR2529290 A1 FR 2529290A1 FR 8211222 A FR8211222 A FR 8211222A FR 8211222 A FR8211222 A FR 8211222A FR 2529290 A1 FR2529290 A1 FR 2529290A1
Authority
FR
France
Prior art keywords
pump
outlet
flow rate
damper
pump discharge
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
FR8211222A
Other languages
French (fr)
Other versions
FR2529290B1 (en
Inventor
Thierry Arnal
Jacques Sallet
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
Priority to FR8211222A priority Critical patent/FR2529290A1/en
Publication of FR2529290A1 publication Critical patent/FR2529290A1/en
Application granted granted Critical
Publication of FR2529290B1 publication Critical patent/FR2529290B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • F04B11/0016—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a fluid spring
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
    • F16L55/05—Buffers therefor
    • F16L55/052—Pneumatic reservoirs
    • F16L55/053—Pneumatic reservoirs the gas in the reservoir being separated from the fluid in the pipe
    • 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
    • F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
    • 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
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The surge damper comprises a cylindrical collar (2) having an inlet connection (2a) from the pump discharge and an outlet (2b) to the system. The connection (2a) has a diameter equal to the nominal diameter of the pump outlet whilst the outlet (2b) is calibrated with an orifice plate or needle valve. Each face of the collar is fitted with a diaphragm (4) bolted between a hemispherical cover (6). The resulting chambers are inflated with a gas, e.g. air, to the required pressure through the valves (8).

Description

La présente invention a pour objet un amortisseur régulateur de débit de pompe. The present invention relates to a damper pump flow regulator.

Le but d'un amortisseur de débit de pompe est de préserver les accessoires sensibles d'un circuit des effets de choc pouvant être engendrés par les liquides en circulation. The purpose of a pump flow damper is to preserve the sensitive accessories of a circuit from the shock effects that can be generated by circulating liquids.

La présente invention a pour objet un amortisseur de débit de pompe de ce type qui permet de supprimer les phénomènes de résonance dans les tuyauteries, de rendre linéaires les débits syncopés et de constituer une réserve de recharge éventuelle du corps de pompe facilitant son réamorçage. The subject of the present invention is a pump flow damper of this type which makes it possible to eliminate the resonance phenomena in the pipes, to make the syncopated flows linear and to constitute a possible recharge reserve of the pump body facilitating its reinforcement.

L'invention utilise l'élasticité de deux membranes associées à deux volumes #de gaz et combinées à un orifice de sortie diaphragme pour encaisser les à coups provoqués par une pompe ou tout circulateur à mouvement alternatif. The invention utilizes the elasticity of two membranes associated with two gas volumes and combined with a diaphragm outlet to accommodate the pulses caused by a reciprocating pump or circulator.

De manière plus précise, l'amortisseur régulateur du débit de pompe de l'invention est caractérisé par un cylindre creux dont les deux bases sont fermées chacune par une membrane élastique et par deux cloches disposées chacune de l'autre côté de la membrane, une entrée et une sortie pour le fluide étant ménagées dans la paroi du cylindre, l'entrée présentant un diamètre correspondant au diamètre nominal de la pompe et la sortie étant calibrée en fonction du débit recherché
De préférence,une valve est disposée dans la paroi de chaque cloche, ce qui permet d'augmenter la pression régnant à l'intérieur de celle-ci.More specifically, the damper regulating the pump flow of the invention is characterized by a hollow cylinder whose two bases are each closed by an elastic membrane and by two bells each disposed on the other side of the membrane, a inlet and outlet for the fluid being formed in the wall of the cylinder, the inlet having a diameter corresponding to the nominal diameter of the pump and the outlet being calibrated according to the desired flow rate
Preferably, a valve is disposed in the wall of each bell, which increases the pressure inside it.

De préférence encore, un robinet à pointeau permet d'ajuster le débit de sortie de l'amortisseur en fonction des variations du débit de la pompe. More preferably, a needle valve makes it possible to adjust the output flow rate of the damper as a function of the variations in the flow rate of the pump.

D'autres caractéristiques et avantages de l'invention apparaîtront encore à la lecture de la des cription qui suit d'un exemple de réalisation donné à titre indicatif et nullement limitatif, en référence aux figures annexées, sur lesquelles
- la figure 1 représente une vue éclatée, partiellement en coupe, d'un dispositif amortisseur ré régulateur du débit d'une pompe conforme à l'invention,
- la figure 2 représente une vue en coupe de ce même amortisseur.Other features and advantages of the invention will become apparent upon reading the following description of an exemplary embodiment given by way of indication and in no way limiting, with reference to the appended figures, in which:
FIG. 1 represents an exploded view, partly in section, of a damper device re regulating the flow rate of a pump according to the invention,
- Figure 2 shows a sectional view of the same damper.

Sur la figure 1, l'amortisseur régulateur de débit de pompe 1 est constitué par un cylindre creux 2, par deux membranes élastiques 4 et par deux cloches 6. In FIG. 1, the pump flow regulator damper 1 is constituted by a hollow cylinder 2, by two elastic membranes 4 and by two bells 6.

Chacune des membranes élastiques 4 ferme l'une des bases du cylindre 2. Les cloches 6 sont disposées de l'autre côté des membranes 4. Chaque cloche 6 délimite un certain volume renfermant de l'air ou un autre gaz.Each of the elastic membranes 4 closes one of the bases of the cylinder 2. The bells 6 are arranged on the other side of the membranes 4. Each bell 6 delimits a certain volume containing air or another gas.

Une valve < > #8 esest aménagée dans la paroi de chacune des cloches 6. Cette valve permet d'augmenter la pression régnant dans l'espace délimité par les cloches 6 et les membranes 4. A valve <> # 8 is arranged in the wall of each of the bells 6. This valve increases the pressure in the space delimited by the bells 6 and the membranes 4.

Le cylindre 2 comporte une entrée 2a pour le fluide et une sortie 2b. L'entrée du fluide s'effectue selon le sens de la flèche f (figure 2 > . The cylinder 2 has an inlet 2a for the fluid and an outlet 2b. The fluid inlet is in the direction of the arrow f (Figure 2>.

L'entrée 2a est usinée au diamètre nominal de la pompe. La sortie 2b comporte un diaphragme qui permet de calibrer l'orifice de sortie de manière à autoriser juste le débit recherché. Si le débit fourni par la pompe est constant, l'orifice de sortie 2b est calibré une fois pour toutes. Dans le cas contraire, un robinet à pointeau permet l'ajustage correspondant à la variation du débit de la pompe. On donne ci-dessous deux exemples d'utilisation d'un amortisseur régulateur de débit conformes à l'invention. The inlet 2a is machined to the nominal diameter of the pump. Output 2b has a diaphragm that calibrates the output port to allow just the desired flow. If the flow rate supplied by the pump is constant, the outlet orifice 2b is calibrated once and for all. In the opposite case, a needle valve allows the adjustment corresponding to the variation of the flow of the pump. Two examples of use of a flow control damper according to the invention are given below.

EXEMPLE I
Une pompe péristaltique est chargée de déplacer du nitrate de plutonium d'un dissolveur vers une centrifugeuse. Ce mouvement s'effectue dans une tuyauterie en acier inoxydable de i3 mm de diamètre. Lors de la mise en marche de la pompe, des phénomènes de résonance ont provoqué des chocs très violents dans la canalisation. Ces chocs, insupportables aussi bien en raison du bruit que des risques de dommages aux installations, devaient être donc supprimés. Pour cela, il était nécessaire de rendre le débit de la pompe linéaire. Aucun dispositif connu existant sur le marché ne permet de résoudre ce problème, notamment en ce qui concerne la résistance chimique.EXAMPLE I
A peristaltic pump is responsible for moving plutonium nitrate from a dissolver to a centrifuge. This movement takes place in a stainless steel pipe of 13 mm diameter. When starting the pump, resonance phenomena caused very violent shocks in the pipe. These shocks, unbearable as well because of the noise that the risk of damage to the facilities, had to be removed. For this, it was necessary to make the flow of the pump linear. No known device on the market can solve this problem, especially with regard to chemical resistance.

La présente invention permet de résoudre ces problèmes. Les inconvénients précités ont disparu. Le débit est régularisé et l'amorçage de la pompe est devenu instantané, ce qui n'avait pas été toujours le cas jusque là.  The present invention solves these problems. The aforementioned disadvantages have disappeared. The flow is regulated and the priming of the pump has become instantaneous, which was not always the case so far.

EXEMPLE Il
A partir d'une pompe à mouvement alternatif dont la pression de service oscille entre 0 et 1,8 kg/cm2, et dont le débit moyen est 4 litres/minute, on obtient un débit constant avec un dispositif régulateur ayant essentiellement les caractéristiques suivantes - diamètre du boitier cylindrique : 150 mm, - hauteur du boîtier cylindrique : 40 mm,
(soit un volume de réamorçage de 0,7 litre), - diamètre de l'orifice d'entrée : 10 mm, - diamètre du diaphragme de l'orifice de sor
tie : 2,5 mm, - pression gaz des cloches : 1 bar absolu.EXAMPLE II
From a reciprocating pump whose operating pressure oscillates between 0 and 1.8 kg / cm 2, and whose average flow rate is 4 liters / minute, a constant flow rate is obtained with a regulator device essentially having the following characteristics: - diameter of the cylindrical case: 150 mm, - height of the cylindrical case: 40 mm,
(ie a reinforcement volume of 0.7 liter), - diameter of the inlet orifice: 10 mm, - diameter of the diaphragm of the orifice of sor
Tie: 2.5 mm, - Gas pressure of the bells: 1 bar absolute.

Il est avantageux de réaliser les cloches en matériau transparent (plexiglas) permettant de s'apercevoir rapidement d'une fuite éventuelle se produisant au travers des membranes.  It is advantageous to make the bells of transparent material (plexiglass) to quickly see any leakage occurring through the membranes.

Claims (3)

REVENDICATIONS 1. Amortisseur régulateur de débit de pompe, caractérisé en ce qu'il est constitué d'un cylindre creux (2) dont les deux bases sont fermées chacune par une membrane élastique (4) et deux cloches (6) disposées chacune de l'autre côté de la membrane (4), une entrée (2a) et une sortie (2b) pour le fluide étant ménagées dans la paroi (2c) du cylindre, l'entrée (2a) présentant un diamètre nominal correspondant au débit de la pompe, la sortie (2b) présentant un orifice calibré en fonction du débit de cette pompe. 1. Damper pump flow regulator, characterized in that it consists of a hollow cylinder (2) whose two bases are each closed by an elastic membrane (4) and two bells (6) each disposed of the another side of the diaphragm (4), an inlet (2a) and an outlet (2b) for the fluid being formed in the wall (2c) of the cylinder, the inlet (2a) having a nominal diameter corresponding to the flow rate of the pump , the outlet (2b) having a calibrated orifice depending on the flow rate of this pump. 2. Amortisseur selon la revendication 1, caractérisé par une valve (8) disposée dans la paroi de chaque cloche (6), ce qui permet d'augmenter la pression régnant dans le volume délimité par la cloche (6) et chaque membrane (4). 2. Damper according to claim 1, characterized by a valve (8) disposed in the wall of each bell (6), which increases the pressure in the volume defined by the bell (6) and each membrane (4). ). 3. Amortisseur selon l'une quelconque des revendications 1 et 2, caractérisé par un robinet à pointeau permettant l'ajustage du débit de sortie en fonction des variations de débit de la pompe.  3. Shock absorber according to any one of claims 1 and 2, characterized by a needle valve for adjusting the output flow rate as a function of flow rate changes of the pump.
FR8211222A 1982-06-25 1982-06-25 Pressure surge damper for pumping system - has two pressurised diaphragm chambers at pump discharge Granted FR2529290A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8211222A FR2529290A1 (en) 1982-06-25 1982-06-25 Pressure surge damper for pumping system - has two pressurised diaphragm chambers at pump discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8211222A FR2529290A1 (en) 1982-06-25 1982-06-25 Pressure surge damper for pumping system - has two pressurised diaphragm chambers at pump discharge

Publications (2)

Publication Number Publication Date
FR2529290A1 true FR2529290A1 (en) 1983-12-30
FR2529290B1 FR2529290B1 (en) 1984-11-30

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FR8211222A Granted FR2529290A1 (en) 1982-06-25 1982-06-25 Pressure surge damper for pumping system - has two pressurised diaphragm chambers at pump discharge

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Country Link
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182321A3 (en) * 1984-11-19 1988-01-07 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Method and apparatus for chromatographic determination of components of liquid samples
US5171134A (en) * 1990-12-20 1992-12-15 Alcoa Separations Technology, Inc. Pulse dampener and associated method
WO1994001680A1 (en) * 1992-07-09 1994-01-20 Hydac Technology Gmbh Multi-diaphragm store
US5490765A (en) * 1993-05-17 1996-02-13 Cybor Corporation Dual stage pump system with pre-stressed diaphragms and reservoir
DE19544223B4 (en) * 1995-11-28 2005-11-24 Robert Bosch Gmbh Vibration damper for damping fluid vibrations in a hydraulic, slip-controlled braking system of motor vehicles
WO2020002004A1 (en) * 2018-06-29 2020-01-02 Hydac Technology Gmbh Hydraulic accumulator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1146250A (en) * 1956-03-23 1957-11-07 Anti-water hammer device
DE1600605A1 (en) * 1967-06-01 1970-03-19 Erich Schueler Hydraulic accumulator with equal pressure behavior
US3867963A (en) * 1972-11-14 1975-02-25 Allan Ballard Pulsation reducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1146250A (en) * 1956-03-23 1957-11-07 Anti-water hammer device
DE1600605A1 (en) * 1967-06-01 1970-03-19 Erich Schueler Hydraulic accumulator with equal pressure behavior
US3867963A (en) * 1972-11-14 1975-02-25 Allan Ballard Pulsation reducer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182321A3 (en) * 1984-11-19 1988-01-07 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Method and apparatus for chromatographic determination of components of liquid samples
US5171134A (en) * 1990-12-20 1992-12-15 Alcoa Separations Technology, Inc. Pulse dampener and associated method
WO1994001680A1 (en) * 1992-07-09 1994-01-20 Hydac Technology Gmbh Multi-diaphragm store
US5596772A (en) * 1992-07-09 1997-01-28 Hydac Technology Gmbh Toilet flushing system with multi-diaphragm storage container having three fluid receiving chambers
US5490765A (en) * 1993-05-17 1996-02-13 Cybor Corporation Dual stage pump system with pre-stressed diaphragms and reservoir
DE19544223B4 (en) * 1995-11-28 2005-11-24 Robert Bosch Gmbh Vibration damper for damping fluid vibrations in a hydraulic, slip-controlled braking system of motor vehicles
WO2020002004A1 (en) * 2018-06-29 2020-01-02 Hydac Technology Gmbh Hydraulic accumulator
US11598351B2 (en) 2018-06-29 2023-03-07 Hydac Technology Gmbh Hydraulic accumulator

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