EP0011022A1 - Pompe équipée d'un système amortisseur de vibrations - Google Patents

Pompe équipée d'un système amortisseur de vibrations Download PDF

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Publication number
EP0011022A1
EP0011022A1 EP79400785A EP79400785A EP0011022A1 EP 0011022 A1 EP0011022 A1 EP 0011022A1 EP 79400785 A EP79400785 A EP 79400785A EP 79400785 A EP79400785 A EP 79400785A EP 0011022 A1 EP0011022 A1 EP 0011022A1
Authority
EP
European Patent Office
Prior art keywords
pump
damping
chamber
fluid
circulation
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.)
Withdrawn
Application number
EP79400785A
Other languages
German (de)
English (en)
French (fr)
Inventor
Georges Lonchampt
Max Malizard
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 EP0011022A1 publication Critical patent/EP0011022A1/fr
Withdrawn legal-status Critical Current

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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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • F04B43/026—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel each plate-like pumping flexible member working in its own pumping chamber
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0081—Special features systems, control, safety measures
    • F04B43/009—Special features systems, control, safety measures leakage control; pump systems with two flexible members; between the actuating element and the pumped fluid
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • the present invention relates to a pump allowing the circulation of a fluid, and in particular a diaphragm pump, equipped with a vibration damping system, as well as such a damping system.
  • the invention relates to a pump comprising at least one pumping assembly of the type comprising two pump bodies each internally separated by at least one membrane delimiting two variable volume cavities, one of the variable volume cavities of each body pump communicating with one of the two chambers of a cylinder constituted by a piston moving in a cylinder, the other cavity with variable volume of each pump body communicating with a device of use via a damping system.
  • Known vibration damping systems are generally constituted by pneumatic accumulators in which the level of the pumped fluid can move between certain limits determined by the air pressure previously established in the accumulator.
  • the damper then constitutes an area which is not directly located in the circulation current of the pumped fluid, so that one or more of the phases of this fluid accumulate in this area, which disturbs the accumulator operation.
  • These disturbances are particularly sensitive when the pumped fluid is a fluid of high density, such as mercury, since the vibrations to be damped are then of high amplitude.
  • pneumatic accumulators of the prior art are generally equipped with a large surface bladder separating the air from the fluid to be pumped.
  • the corrosive nature of certain fluids requires the use of flexible materials which are insensitive to this corrosion, such as polytetrafluoroethylene.
  • these materials are porous and therefore cannot be brought into direct contact with air, and they do not allow the production of large surface bladders.
  • the pneumatic accumulators cannot be pressurized before the pump is started.
  • the present invention relates to the production of a pump equipped with a vibration damping system which does not have the drawbacks of the systems of the prior art.
  • a pump of the type defined above is characterized in that the damping system comprises at least one enclosure in which is disposed at least one membrane separating a circulation chamber of the pumped fluid from a chamber d damping in which a non-corrosive liquid is received, the membrane and the other walls of the circulation chamber of the pumped fluid being arranged substantially in the extension of the pipe in which this fluid circulates between the other cavity with variable volume of each body pump and the apparatus for use so as to allow the circulation of the fluid throughout the volume of the circulation chamber, the damping chamber communicating with a variable volume reservoir via another pipe.
  • the damping system comprises two membranes defining between them said circulation chamber and, on either side, two damping chambers communicating with the variable volume tank.
  • a grid having a concave surface facing the membrane is arranged in the damping chamber.
  • the pump preferably comprises several pumping assemblies whose pump bodies and damping systems are assembled to form three adjacent stacks of the same length.
  • the jack can then comprise a cylinder and a piston for each pumping assembly and a single control rod integral with the pistons.
  • each of the pump bodies comprises two membranes delimiting said variable volume cavities, these cavities enclosing a constant volume cavity in which is located a grid having a concave surface facing each membrane.
  • the invention also relates to such a vibration damping system arranged in a pipe connecting a pump body and an apparatus for use.
  • FIG. 1 a modular pump assembly consisting of two pump bodies 1 and l * . These two bodies being perfectly identical, the references relating to the pump body will be the same as those relating to the pump body 1, assigned the prime accent.
  • Each pump body consists of an enclosure 3, inside which two flexible membranes 5 and 7 are placed. These two membranes delimit inside the body three cavities, respectively 9, 11 and 13.
  • the cavities 9 and 13 have variable volumes in operation while the cavity 11, closed and filled with liquid, has a constant volume.
  • a jack 17 is associated with the pump.
  • This jack 17 comprises a cylinder 19 per pumping assembly.
  • Each cylinder 19 is divided into two chambers 21 and 22, by means of a piston 23 provided with a seal 25.
  • the pistons 23 are all secured to a single rod 27 set in motion by a control means (not shown).
  • Seals 29 provide the various seals between the extreme cylinders and the exterior, on the one hand, and between each cylinder on the other.
  • a pipe 31 connects the chamber 21 to the cavity 9 while a pipe 33 connects the chamber 22 and the cavity 9 '.
  • the cavities 9 and 9 'and the cylinder 19 are filled with oil.
  • a damper 35 is associated with each pumping assembly.
  • This damper is formed by an enclosure 37 inside which two flexible membranes 39 are arranged. These two membranes thus form three chambers 41, 43 and 45.
  • a pipe 47 connects the cavity 13 of the pump body 1 to the chamber central 43 of the damper, while a pipe 47 'connects the cavity 13' of the pump body 1 'to the same central chamber 43.
  • Discharge valves 49 and 49' placed on the pipes 47 and 47 ' ensure the flow of the fluid to be moved in the desired direction.
  • Two grids 51, located in the two lateral chambers 41 and 45 limit the strokes of the membranes 39 and prevent them from tearing.
  • These two lateral chambers 41 and 45, filled with oil, are placed in communication, via a pipe 53, with an expansion tank 55 comprising a deformable volume 57.
  • the fluid to be circulated is contained in a tank 59.
  • This tank 59 is connected on the one hand to the chambers 13 and 13 'of the bodies 1 and l' by means of conduits 61 and 61 'and on the other hand to the central chamber 43 of the damper 35 thanks to a pipe 63, suction valves 65 and 65 'being placed on the lines 61 and 61'.
  • the structure of the damper 35 is such that the membranes 39 and the other walls delimiting the chamber 43, in which the pumped fluid circulates, are arranged substantially in the extension of the pipes 47, 47 ′ and 63, so that all of the pumped fluid in the chamber 43 is in circulation.
  • This arrangement is particularly advantageous when the pumped fluid is multiphase, since it prevents any accumulation of one or more of the phases of the fluid in the damper, which allows the latter to fulfill its role perfectly.
  • expansion 55 allows the use of membranes made of a corrosion-resistant material, such as polytetrafluoroethylene, without the porous nature of this material having any consequences on the efficiency of the damper.
  • the structure of the reservoir 55 which includes a non-return valve (not shown), allows pressurization of this reservoir, and therefore of the damper 35 to which it is connected by line 53, when the pump is stopped.
  • the cavity 13 therefore sucks a part of the liquid contained in the reservoir 59, while the cavity 13 'discharges into the central chamber 43 of the damper 35 part of the liquid which it contains. This liquid only passes through the chamber 43, from which it is expelled towards the reservoir 59 through the pipe 63.
  • the upward displacement of the rod 27 of the jack 17 has opposite consequences on the volumes of the cavities 9 and 9 'and, consequently, on the displacement of the liquid between the reservoir 59, the cavities 13 and 13' and the chamber 43 of the damper 35.
  • the back-and-forth movement of the rod 27 therefore has the consequence that the fluid is successively sucked from the reservoir 59 into the chambers 13 and 13 'and discharged from these chambers to the reservoir via the 'Damper 35, the fluid being sucked into the chamber 13 when it is discharged from the chamber 13', and vice versa.
  • the damper 35 compensates for the jolts of fluid to be displaced thanks to the two lateral chambers 41 and 45. These are filled with water or oil and are in communication, via the pipe 53, with the expansion tank 55, partially filled with this oil or with this water and containing a bladder 57 inflated with compressed air. By this means, the sudden variations in the volumes of the fluids located in 41, 43 and 45 are absorbed.
  • FIGS. 2 and 3 show a pump comprising several pumping assemblies of the type which has just been described with reference to FIG. 1.
  • the pump bodies and the damping systems of these pumping assemblies are assembled from so as to form three adjacent stacks of the same length.
  • Figure 2 which is an end view, of a pump according to the invention, we recognize the two bodies pump 1 and the rigidly attached to the damper 35 forming a base.
  • the pump bodies of each module are assembled separately by means such as the tie rods shown at 67.
  • the pump bodies 1 and 1 ' are formed from a metal part 71 surrounding a coating 73 of polypropylene. They are connected, on the one hand, to the reservoir 59 by the pipes 61 and on the other hand, to the damper 35 by the pipes 47. These pipes are formed from polypropylene tubes 74, held in place by means of metallic frets 75. They are respectively provided with suction and discharge valves with balls 65 and 49 which regulate the flow of the fluid.
  • the pump bodies 1 and l are fixed to the shock absorber 35 forming a base by means of tie rods 81.
  • the chamber 43 of the shock absorber receives the fluid in circulation through the pipe 47. The liquid leaves the chamber 43 through the pipe 63 , to return to the tank 59.
  • FIG. 1 we also recognize the expansion tank 55 and the pipe 53 connecting it to the shock absorber 35.
  • Each shock absorber 35 is assembled separately by means of tie rods 83.
  • the pump bodies and the shock absorbers are stacked and held in place by tie rods 69 and 83.
  • the three cavities 9 are recognized. , 11 and 13 of the pump body 1 consisting of the metal casing 71 and the polypropylene coating 73. These cavities are separated by the flexible membranes 5 and 7.
  • the cavity 13 is connected, at its upper part to the reservoir 59 by the line 61 and, at its lower part, to the shock absorber 35 via line 47.
  • the lines 61 and 47, fitted with valves 65 and 49, are formed of a metal casing 75 surrounding polypropylene 74.
  • the cavity 9 of the body 1 is connected to the jack 17 (see FIG.
  • the reservoir 59 constitutes an electrolyser with a mercury cathode and the fluid to displace the cathode mercury.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP79400785A 1978-10-27 1979-10-23 Pompe équipée d'un système amortisseur de vibrations Withdrawn EP0011022A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7831247A FR2439880A1 (fr) 1978-10-27 1978-10-27 Pompe a membranes constituee d'une pluralite de modules
FR7831247 1978-10-27

Publications (1)

Publication Number Publication Date
EP0011022A1 true EP0011022A1 (fr) 1980-05-14

Family

ID=9214474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400785A Withdrawn EP0011022A1 (fr) 1978-10-27 1979-10-23 Pompe équipée d'un système amortisseur de vibrations

Country Status (4)

Country Link
EP (1) EP0011022A1 (enrdf_load_stackoverflow)
JP (1) JPS5560676A (enrdf_load_stackoverflow)
AU (1) AU5202979A (enrdf_load_stackoverflow)
FR (1) FR2439880A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898093A1 (de) * 2006-09-04 2008-03-12 BRAN + LUEBBE GmbH Pumpenvorrichtung

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR530978A (fr) * 1921-02-12 1922-01-04 Rouchaud & Lamassiaude Ets Perfectionnements apportés aux pompes alimentant les filtres-presses
FR942755A (fr) * 1946-03-07 1949-02-17 Kodak Pathe Pompe à débit constant
GB797840A (en) * 1955-07-13 1958-07-09 Distillers Co Yeast Ltd Improvements relating to hydrolically actuated diaphragm pumps
US2951450A (en) * 1956-04-17 1960-09-06 John C Fisher Fluid pump
US3070030A (en) * 1958-07-24 1962-12-25 William H Mashinter Pump
GB1013719A (en) * 1962-10-17 1965-12-22 Merrill Pumps Ltd Improvements in or relating to diaphragm pumps
FR1426416A (fr) * 1964-01-08 1966-01-28 Panther Pumps & Equipment Comp Appareil de transfert actionné par un fluide
FR1571480A (enrdf_load_stackoverflow) * 1968-04-30 1969-06-20
FR2125847A5 (enrdf_load_stackoverflow) * 1971-02-16 1972-09-29 Kloeckner Humboldt Deutz Ag
FR2164024A1 (enrdf_load_stackoverflow) * 1971-12-10 1973-07-27 Malizard Max
FR2203485A5 (enrdf_load_stackoverflow) * 1972-10-17 1974-05-10 Guinard Pompes
DE2624129A1 (de) * 1975-09-08 1977-03-31 Ring Membranpumpe

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR530978A (fr) * 1921-02-12 1922-01-04 Rouchaud & Lamassiaude Ets Perfectionnements apportés aux pompes alimentant les filtres-presses
FR942755A (fr) * 1946-03-07 1949-02-17 Kodak Pathe Pompe à débit constant
GB797840A (en) * 1955-07-13 1958-07-09 Distillers Co Yeast Ltd Improvements relating to hydrolically actuated diaphragm pumps
US2951450A (en) * 1956-04-17 1960-09-06 John C Fisher Fluid pump
US3070030A (en) * 1958-07-24 1962-12-25 William H Mashinter Pump
GB1013719A (en) * 1962-10-17 1965-12-22 Merrill Pumps Ltd Improvements in or relating to diaphragm pumps
FR1426416A (fr) * 1964-01-08 1966-01-28 Panther Pumps & Equipment Comp Appareil de transfert actionné par un fluide
FR1571480A (enrdf_load_stackoverflow) * 1968-04-30 1969-06-20
FR2125847A5 (enrdf_load_stackoverflow) * 1971-02-16 1972-09-29 Kloeckner Humboldt Deutz Ag
FR2164024A1 (enrdf_load_stackoverflow) * 1971-12-10 1973-07-27 Malizard Max
FR2203485A5 (enrdf_load_stackoverflow) * 1972-10-17 1974-05-10 Guinard Pompes
DE2624129A1 (de) * 1975-09-08 1977-03-31 Ring Membranpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1898093A1 (de) * 2006-09-04 2008-03-12 BRAN + LUEBBE GmbH Pumpenvorrichtung
EP2108838A1 (de) * 2006-09-04 2009-10-14 BRAN + LUEBBE GmbH Pumpenvorrichtung
US8360750B2 (en) 2006-09-04 2013-01-29 Bran+Luebbe Gmbh Pump device

Also Published As

Publication number Publication date
AU5202979A (en) 1980-05-01
FR2439880B1 (enrdf_load_stackoverflow) 1982-06-25
FR2439880A1 (fr) 1980-05-23
JPS5560676A (en) 1980-05-07

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE DE GB IT NL SE

17P Request for examination filed

Effective date: 19801013

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19820225

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LONCHAMPT, GEORGES

Inventor name: MALIZARD, MAX