EP0537334A1 - Pompe a diaphragmes et a pistons - Google Patents

Pompe a diaphragmes et a pistons

Info

Publication number
EP0537334A1
EP0537334A1 EP92911713A EP92911713A EP0537334A1 EP 0537334 A1 EP0537334 A1 EP 0537334A1 EP 92911713 A EP92911713 A EP 92911713A EP 92911713 A EP92911713 A EP 92911713A EP 0537334 A1 EP0537334 A1 EP 0537334A1
Authority
EP
European Patent Office
Prior art keywords
pumping
supplemental
chambers
fluid
chamber
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Withdrawn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
EP92911713A
Other languages
German (de)
English (en)
Inventor
Louis Van Den Bergh
Georges Verberckmoes
Werner De Jonghe
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.)
Aro Corp
Original Assignee
Aro Corp
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 Aro Corp filed Critical Aro Corp
Publication of EP0537334A1 publication Critical patent/EP0537334A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel

Definitions

  • This invention relates generally to an improved double acting diaphragm pump and, more particularly, to a double acting diaphragm pump wherein the pumping force upon the fluid which is to be pumped exceeds the force attributable to pneumatic or other fluid pressure directly on the diaphragm.
  • Such pumps are often called 2:1, 3:1, etc. diaphragm pumps.
  • a double acting diaphragm pump typically includes first and second, main diaphragms each of which separate a pump chamber from a pressure chamber.
  • the pump chamber receives the fluid or material pumped or transported and the pressure chamber receives pressurized fluid such as air that acts upon the diaphragm to .effect flexure and thus pumping action.
  • the separate diaphragms for a double acting diaphragm pump art ⁇ generally connected by a shaft so that the diaphragms will reciprocate in unison in a manner which alternately provides pumping of fluid from one of the pump chambers or the other. Since the two pump chambers are connected to a common inlet manifold and a common outlet manifold, a continuous flow of fluid into the inlet manifold and from the outlet manifold is provided by the described operation of the pump.
  • the force to effect the pumping action by such a pump is equal to the area of the diaphragm times the pressure per unit of area of the diaphragm.
  • the pumping force is limited by the area of the main diaphragm.
  • a known double acting diaphragm pump which provides for enhanced pumping force on fluid in the pumping chamber includes a separate fluid pressure diaphragm mechanically connected to a spaced main pumping diaphragm b ⁇ a shaft.
  • the separate fluid pressure diaphragm has a surface area which may be equal to or greater than the main pumping diaphragm thus providing an increased pumping force through the mechanical shaft connection to the main pumping diaphragm.
  • the present invention relates to a double acting diaphragm pump of the type which includes a pair of flexible diaphragms interconnected by a shaft and operative to reciprocate in response to pressure on one or the other of the diaphragms to effect pumping through a first pumping chamber associated with one diaphragm and a second pumping chamber associated with the other diaphragm.
  • a continuous fluid input and output is effected by the double acting diaphragm pump.
  • the invention specifically relates to the improvement of a supplemental pressure chamber defined, in part, by a piston and cylinder which provides an additive pumping force to the main diaphragm via a connected shaft means.
  • the additive force is synchronized with the force derived from pressure on the appropriate main diaphragm. Such synchronization is effected by means of a parallel fluid pressure conduit connection to the supplemental chamber and the pressure chamber. In this manner, additive force may be provided for each of the pumping chambers. Additional supplemental chambers connected in parallel in the manner described may provide further additive forces for pumping.
  • an improved, double acting, diaphragm pump comprising at least one supplemental pressure housing including first and second supplemental fluid pressure chambers and a supplemental piston and cylinder, each of said first and second supplemental fluid pressure chambers having a wall thereof defined by said supplemental piston, said supplemental piston being connected to the shaft means for movement therewith; and fluid conduit means for connecting said source means with said second supplemental fluid pressure chamber in parallel with said first pumping chamber and for connecting said source means with said first supplemental fluid pressure chamber in parallel with said second pumping chamber, thereby effecting an additive pumping force associated with the supplemental piston and driving said shaft means for pumping by said first and second pumping chambers.
  • Fig. 1 is a cross sectional view of an embodiment of the improved double acting diaphragm pump of the present invention.
  • the present invention is shown in a preferred embodiment in Fig. 1 and constitutes an improvement relative to the construction described in U.S. Patent No. 4,830,586.
  • the present invention thus relates to a double acting diaphragm pump.
  • the double acting diaphragm pump of the invention includes an inlet manifold 20 and an outlet manifold 18, and thence into one of two pumping chambers 10 or 12. Fluid from the chambers 10 or 12 then flows into the outlet manifold 20 and subsequently through outlet 50. Fluid is pumped alternatively from pumping chamber 10 and from pumping chamber 12. In this manner fluid is continuously pumped from the inlet 44 through the outlet 50 as the fluid alternatively is pumped via chambers 10 and 12.
  • check valves 47. 49. 51 and 53 are provided at the entrance and exit of each chamber 10 and 12 to control the direction of fluid flow through the chambers 10 and 12 from the inlet manifold 18 to the outlet manifold 20 as the diaphragms 14 and 16 associated with the pumping chambers flex to effect fluid flow.
  • Chamber 10 is formed, in part, by a housing 52, and a flexible diaphragm 14 which is a main diaphragm 14 that cooperates with housing 52.
  • Diaphragm 14 is sandwiched between plates 56 and 58 which connects to a shaft 22.
  • the shaft 22 reciprocates within a second housing 62.
  • the second housing 62 and diaphragm 14 further define a pressure chamber 64.
  • a fluid pressure conduit 66 connects from a pilot control valve assembly 28 to chamber 64 and provides high pressure fluid to the chamber 64 that acts against the surface area of the. diaphragm 14 causing operation or flexure of the diaphragm 14 and pumping of fluid through chamber 10. Alternately, conduit 66 connects to an exhaust as controlled by assembly 28.
  • chamber 12 is defined by a housing 66 and a main flexible diaphragm 16.
  • the diaphragm 16 is held between plates 70 and 72 which attach with the shaft 60.
  • the shaft 60 is further retained within a housing 74 which defines a second pressure chamber 76.
  • a fluid conduit 69 connects to the second pressure chamber 76 by way of the control mechanism 28.
  • Conduit 69 may also connect to exhaust.
  • the chambers 64 and 76 are alternatively pressurized and the diaphragms 14 and 16 alternatively flex in reciprocal fashion to cause fluid to flow into the chambers 10 and from the chambers 12 or vice versa.
  • the operation and flow of pressure to the chambers 64 and 76 via conduits 66, 69 is effected by the control means 28.
  • the improvement of the present invention constitutes the inclusion of supplemental pressure chambers 26 and 34 defined by the housing 62 and 74 in combination with an additional supplemental piston 24.
  • Piston 24 separates the supplemental pressure chambers 34 and 26 and is generally coaxial with the chambers 10 and 12 and the shafts 60 and 22.
  • the supplemental piston 24 is sandwiched between shaft 60 and adapter 80.
  • This assembly reciprocates in unison with the shaft 60.
  • the direction of movement of the piston 24 within the supplemental pressure chambers 34 and 26 is determined by the pressure acting on piston 24 which, in turn, is a function of control means 28 and the connection thereof through appropriate conduits to chambers 34 and 26.
  • conduit 66 is in parallel relation with a conduit 90 to chamber 26 so that chamber 26 is pressurized simultaneously with chamber 64.
  • the chamber 34 is connected in parallel via conduit 91 with the chamber 76.
  • the chambers 34 and 76 are simultaneously pressurized and the force of fluid pressure within those chambers 34 and 36 acts on the diaphragms 16 and through the shaft 60 against fluid within the chamber 12.
  • the piston 24 has a surface area exactly equal to that of the diaphragm 14. then the total force on the fluid within the chamber 10 is twice that of a typical prior art pump that does not include the piston 24, in other words, a typical double acting diaphragm pump.
  • the pressure on fluid within the chamber 12 would be doubled due to pressure in chambers 34 and 76.
  • the piston 24 is thus typically circular and concentric with the shaft 60.
  • the shaft 60 reciprocates back and forth and acts to transmit force and movement of the various diaphragms at each of the chambers 34, 76, 26 and 54 are alternately filled with pressurized air or fluid and connected to exhaust.
  • the surface area or effective surface area of the piston 24 may be of any desired size in order to control the additive force imparted to the shaft 60.
  • the area of the piston 24 may be twice that of the area of the diaphragm 14.
  • the area of the piston 24 may be one half that of the area of the diaphragm 14.
  • a plurality of piston and cylinders providing supplemental pressure may be arranged along the axis of the shaft 60. That is, plurality of supplemental piston and cylinders and associated supplemental chambers may be arranged in parallel arrangement along the axis of the shaft 60, each of the supplemental chambers associated with a supplemental piston and cylinder being appropriately connected with a pressure source in parallel with the main pressure chamber to drive the shaft 60 and provide pressure to the appropriate pumping chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Une pompe à diaphragmes à double effet perfectionnée met en oeuvre au moins une chambre de pression supplémentaire (26, 34), y compris un piston (24) et un cylindre supplémentaires, disposée coaxialement à l'arbre (60) de renvoi des deux diaphragmes (14, 16). Les chambres supplémentaires (26, 34) sont reliées, par l'intermédiaire de canalisations ou de conduits (90, 91) de pression parallèles, à la source de pression pour les deux diaphragmes (14, 16) et les chambres de pression associées (64,76).
EP92911713A 1991-05-02 1992-05-01 Pompe a diaphragmes et a pistons Withdrawn EP0537334A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US69479791A 1991-05-02 1991-05-02
US694797 1991-05-02
US83755292A 1992-02-19 1992-02-19
US837552 1992-02-19

Publications (1)

Publication Number Publication Date
EP0537334A1 true EP0537334A1 (fr) 1993-04-21

Family

ID=27105439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92911713A Withdrawn EP0537334A1 (fr) 1991-05-02 1992-05-01 Pompe a diaphragmes et a pistons

Country Status (4)

Country Link
EP (1) EP0537334A1 (fr)
JP (1) JPH06501086A (fr)
CA (1) CA2084878A1 (fr)
WO (1) WO1992019868A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06221270A (ja) * 1993-01-28 1994-08-09 Iwata Air Compressor Mfg Co Ltd 倍圧ダイアフラムポンプ
US5391060A (en) * 1993-05-14 1995-02-21 The Aro Corporation Air operated double diaphragm pump
US5927954A (en) 1996-05-17 1999-07-27 Wilden Pump & Engineering Co. Amplified pressure air driven diaphragm pump and pressure relief value therefor
US8197231B2 (en) 2005-07-13 2012-06-12 Purity Solutions Llc Diaphragm pump and related methods
US9610392B2 (en) 2012-06-08 2017-04-04 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818191A (en) * 1982-03-31 1989-04-04 Neyra Industries, Inc. Double-acting diaphragm pump system
US4830586A (en) * 1987-12-21 1989-05-16 The Aro Corporation Double acting diaphragm pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9219868A1 *

Also Published As

Publication number Publication date
JPH06501086A (ja) 1994-01-27
WO1992019868A1 (fr) 1992-11-12
CA2084878A1 (fr) 1992-11-03

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Legal Events

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