EP3734066A1 - Elektrische axialmembranpumpe - Google Patents

Elektrische axialmembranpumpe Download PDF

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Publication number
EP3734066A1
EP3734066A1 EP19172663.7A EP19172663A EP3734066A1 EP 3734066 A1 EP3734066 A1 EP 3734066A1 EP 19172663 A EP19172663 A EP 19172663A EP 3734066 A1 EP3734066 A1 EP 3734066A1
Authority
EP
European Patent Office
Prior art keywords
membrane
membrane pump
housing
pump according
outlet
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
EP19172663.7A
Other languages
English (en)
French (fr)
Other versions
EP3734066B1 (de
Inventor
Johan Hendrik Sch ppers
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.)
Mtp Met Plast Sp zoo
Original Assignee
Pump Innovation BV
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 Pump Innovation BV filed Critical Pump Innovation BV
Priority to ES19172663T priority Critical patent/ES2891984T3/es
Priority to PL19172663T priority patent/PL3734066T3/pl
Priority to EP19172663.7A priority patent/EP3734066B1/de
Publication of EP3734066A1 publication Critical patent/EP3734066A1/de
Application granted granted Critical
Publication of EP3734066B1 publication Critical patent/EP3734066B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B43/0054—Special features particularities of the flexible members
    • 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
    • F04B43/04—Pumps having electric drive
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms

Definitions

  • the invention relates to a membrane pump comprising:
  • Such a membrane pump is for example known from WO 2006055626 or Wikipedia (https: // en.wikipedia.org/wiki/Diaphragm_pump).
  • a membrane pump generates a pulsation in the fluid flow it pumps due to the reciprocating movement of the membranes.
  • the downstream fluid lines connected to the pump are subjected to stresses, high pressure and water hammer. These vibrations in the fluid lines cause furthermore noise, fatigue and wear.
  • a membrane pump according to the preamble, which is characterized in that the two main compartments of the pump chambers are adjacent to each other and the two sub compartments of the pump chambers are distal from each other.
  • the fluid flow can enter the housing centrally and divide to either the left pump chamber or the right pump chamber without much deviation. And the fluid can leave the main compartments and the housing centrally.
  • the connecting channels between the inlet port and the inlet openings of the pump chambers, as well as the channels between the outlet port and the outlet openings can be short, such that the volume of fluid which has to be decelerated and accelerated when switching from one pump chamber to the other, can be kept small. As a result a more continuous flow is obtained and the pulsation in the downstream fluid lines is reduced, reducing stress, pressure peaks, noise, wear and so on.
  • the driving means comprise:
  • the excenter mechanism is a Scotch yoke mechanism.
  • a Scotch yoke which is also known as a slotted link mechanism, is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa.
  • the piston or other reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part.
  • the location of the piston versus time is a sine wave of constant amplitude, and constant frequency given a constant rotational speed.
  • the sine wave motion of the Scotch yoke mechanism causes a fluent acceleration and deceleration of the fluid volume within the membrane pump, such that pulsations are further reduced.
  • the stroke length of the reciprocating movement is less than 20mm, preferably less than 12mm.
  • the rotational speed of the drive shaft is more than 250 revolutions per minute, preferably more than 295 revolutions per minute.
  • the Scotch yoke mechanism is quite suitable for high speed driving by an electric motor. Due to the high frequency or revolutions per minute, the stroke can be small, while still generating a substantial fluid flow by the membrane pump according to the invention. The small stroke further allows for the dimensions of the housing to be relative small.
  • the one way valves arranged in the inlet openings and the outlet openings are flat check valves having a resilient flap closing off the respective opening.
  • the flat check valves allow for the distance between the two pump chambers to be reduced.
  • the flat check valves will require little space, such that a higher rate of the space of the pump chamber can effectively be used for the movement of the membrane.
  • the amount of fluid, present in connecting channels and the main compartment, at the end of a compression stroke of the membrane is reduced and accordingly less fluid needs to be decelerated and accelerated at each stroke of the membranes.
  • an equalizing channel is arranged in the housing, which equalizing channel connects the sub compartments of the two pump chambers for equalizing pressure.
  • the movement of one membrane is assisted by the other membrane.
  • one membrane When one membrane is compressing the main compartment, an under pressure will be generated in the corresponding sub compartment.
  • the other membrane will be decompressing the corresponding main compartment, such that an overpressure will be generated in the sub compartment, which overpressure can be equalized with the underpressure in the other sub compartment.
  • the inlet port and outlet port are arranged in an axial plane positioned between the two pump chambers.
  • the main axis of the inlet port and main axis of the outlet port are coaxial.
  • the membranes are substantially cup-shaped.
  • the walls of the sub compartments are cup-shaped and correspond to the cup-shaped membranes, such that in one end position of the reciprocal movement, the membrane is in substantial full contact with the cup-shaped walls of the sub compartments.
  • the cup-shape of the membranes allow for substantial flexibility to move the membrane from one axial end position to the other axial end position. Having the walls of the sub compartments corresponding to the cup-shape of the membranes a full stroke of the membrane will displace a maximal amount of fluid compared to the volume of the pump chamber, ensuring that the stroke volume of a membrane is optimized compared to the volume of the pump chamber.
  • FIG. 1 shows an exploded view of an embodiment of a membrane pump 1 according to the invention.
  • the pump 1 has a housing consisting out of a number of housing parts 2, 3, 4, 5, which are typically bolted together.
  • the housing parts 2, 3, 4, 5 allow for an easy disassembly, when the pump 1 requires maintenance.
  • An inlet port 6 and an outlet port 7 are arranged between the housing parts 3 and 4 and connect to inlet openings 8 and outlet openings 9.
  • first membrane 10 is arranged between the housing parts 2 and 3, while a second membrane 11 is arranged between the housing parts 4 and 5.
  • the first membrane 10 and the second membrane 11 are connected via a connection rod 12.
  • the membranes 10, 11 are reciprocatingly moved by an electric motor 13, which drives a Scotch yoke mechanism 14, which is coupled via a rod 15 to the membranes 10, 11.
  • FIGS. 1A and 2B show perspective views of the Scotch yoke mechanism 14.
  • a drive shaft 16 is provided with a disc 17 on which an excentric stub 18 is provided.
  • a bearing 19 is arranged on the stub 18 and is positioned within a body 20 provided with a slot 21.
  • the body 20 is guided along two guides 22 and is coupled to the rod 15.
  • FIG. 3 shows the inlet port 6 and the outlet port 7 in cross sectional view.
  • the inlet port 6 connects via a Y-shaped channel 24 to the inlet openings 8, which are provided with flat check valves 23.
  • the outlet port 7 is connected via a channel 25 to the outlet openings 9, which are provided with flat check valves 26.
  • Figure 4A shows a schematic cross-section of the pump 1 wherein the Scotch yoke mechanism 14 has pushed the rod 15 to the right.
  • the membrane 10 is arranged in a left pump chamber 30, 31 dividing said chamber into a main compartment 30 and a sub compartment 31.
  • the membrane 11 is arranged in a right pump chamber 32, 33 dividing said chamber into a main compartment 32 and a sub compartment 33. Both sub compartments 31, 33 are in fluid connection with each other via an equalizing channel 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP19172663.7A 2019-05-03 2019-05-03 Elektrische axialmembranpumpe Active EP3734066B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES19172663T ES2891984T3 (es) 2019-05-03 2019-05-03 Bomba de membrana axial eléctrica
PL19172663T PL3734066T3 (pl) 2019-05-03 2019-05-03 Elektryczna osiowa pompa membranowa
EP19172663.7A EP3734066B1 (de) 2019-05-03 2019-05-03 Elektrische axialmembranpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19172663.7A EP3734066B1 (de) 2019-05-03 2019-05-03 Elektrische axialmembranpumpe

Publications (2)

Publication Number Publication Date
EP3734066A1 true EP3734066A1 (de) 2020-11-04
EP3734066B1 EP3734066B1 (de) 2021-09-01

Family

ID=66589189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19172663.7A Active EP3734066B1 (de) 2019-05-03 2019-05-03 Elektrische axialmembranpumpe

Country Status (3)

Country Link
EP (1) EP3734066B1 (de)
ES (1) ES2891984T3 (de)
PL (1) PL3734066T3 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2306900A1 (de) * 1973-02-13 1974-08-15 Lothar Pracht Gmbh & Co Kg Mas Hochleistungs-doppelmembran-saugund druckpumpe zur verwendung fuer die grundwasserhaltung
EP0298615A2 (de) * 1987-06-11 1989-01-11 Flotronic Controls Limited Doppel-Membranpumpe
WO1999025999A1 (en) * 1997-11-13 1999-05-27 Svante Bahrton A valve arrangememt
WO2006055626A2 (en) 2004-11-17 2006-05-26 Proportionair, Inc. Control system for an air operated diaphragm pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2306900A1 (de) * 1973-02-13 1974-08-15 Lothar Pracht Gmbh & Co Kg Mas Hochleistungs-doppelmembran-saugund druckpumpe zur verwendung fuer die grundwasserhaltung
EP0298615A2 (de) * 1987-06-11 1989-01-11 Flotronic Controls Limited Doppel-Membranpumpe
WO1999025999A1 (en) * 1997-11-13 1999-05-27 Svante Bahrton A valve arrangememt
WO2006055626A2 (en) 2004-11-17 2006-05-26 Proportionair, Inc. Control system for an air operated diaphragm pump

Also Published As

Publication number Publication date
EP3734066B1 (de) 2021-09-01
PL3734066T3 (pl) 2021-12-27
ES2891984T3 (es) 2022-02-01

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