EP0012584A1 - Pompe à membrane pour pressions élevées - Google Patents

Pompe à membrane pour pressions élevées Download PDF

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Publication number
EP0012584A1
EP0012584A1 EP79302829A EP79302829A EP0012584A1 EP 0012584 A1 EP0012584 A1 EP 0012584A1 EP 79302829 A EP79302829 A EP 79302829A EP 79302829 A EP79302829 A EP 79302829A EP 0012584 A1 EP0012584 A1 EP 0012584A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
passage
hydraulic fluid
space
pump according
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Withdrawn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
EP79302829A
Other languages
German (de)
English (en)
Inventor
John Richard Prestwich
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.)
Warwick Pump & Engineering Co Ltd
Original Assignee
Warwick Pump & Engineering Co Ltd
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 Warwick Pump & Engineering Co Ltd filed Critical Warwick Pump & Engineering Co Ltd
Publication of EP0012584A1 publication Critical patent/EP0012584A1/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Withdrawn legal-status Critical Current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
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0063—Special features particularities of the flexible members bell-shaped 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
    • F04B43/0009—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
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • This invention relates to a high pressure diaphragm pump comprising a housing containing at least one self-restoring diaphragm, the or each diaphragm being arranged within the housing so as to separate a space for receiving hydraulic fluid from a space for receiving fluid to be pumped, the space for receiving hydraulic fluid communicating with a hydraulic fluid supply via a passage.
  • a high pressure diaphragm pump comprising a housing containing at least one self-restoring diaphragm, the or each diaphragm being arranged within the housing so as to separate a space for receiving hydraulic fluid from a space for receiving fluid to be pumped, the space for receiving hydraulic fluid communicating with a hydraulic fluid supply via a passage.
  • the invention intends to overcome this disadvantage in a pump as set forth above, and to this end the diaphragm carries a closure member on its side facing the hydraulic fluid space for closing the passage when the diaphragm reaches the end of its intake movement.
  • the passage enters the hydraulic fluid space via a flared passage portion, and the closure member is a poppet'which fits into the flared portion to close the passage.
  • the passage is preferably closed when there is still some hydraulic fluid remaining within the hydraulic fluid space, to act as a cushion in the event or nign pressures occurring on the opposite side of the diaphragm, to prevent the central part of the diaphragm from touching any parts of the housing.
  • the angle of the flared passage portion and of the edges of the poppet may be 45°. This ensures that there is no chance of the poppet jamming in the passage portion when the diaphragm is required to carry out a pumping movement.
  • the poppet does not have to form a fluid-tight seal in the flared passage portion.
  • the diaphragm may be formed with an undercut recess which receives a flange of the poppet. No further fixing means are necessary.
  • the passage for supplying hydraulic fluid preferably enteres the hydraulic fluid space in the centre thereof, and the closure member will then be in the centre of the diaphragm.
  • the or each diaphragm may have a thickness to diameter ratio of at least 1:5, and the peripheral edge of the or each diaphragm may be a right cylindrical surface, and flat annular surfaces may adjoin the cylindrical surface at the top and bottom of the peri- .- pheral edge.
  • Such a diaphragm can be mounted in the housing within a cylindrical housing portion of diameter equal to or slightly less than the diameter of the right cylindrical surface, and be confined by surfaces exerting an axial compression on said top and bottom annular surfaces.
  • the housing construction can be greatly simplified because the diaphragm can be mounted within a circular bore in a plate, and the axial compression can be applied by two flat plates mounted respectively above and below the diaphragm, and pulled together by bolts.
  • the diaphragm is also in a shape which is easier to make than the shape shown in our prior U.S. Patent Specification.
  • the diaphragm may also be constructed with a step at the edge of its side which faces the space for receiving fluid to be pumped.
  • the underside of the diaphragm follows a continuous curve down to the bottom plate in which the inlet and discharge valves are formed, it is found that, on flattening the diaphragm, contact first occurs between the metal and the diaphragm at positions close to the edges of the diaphragm. Any contact between the moving part of the diaphragm-and a metal surface should be avoided, since this leads to wear. The provision of the step prevents this contact.
  • the pump housing 1 contains two diaphragms 2 each contained in a chamber 3. Above each diaphragm 2 there is a space 3a for receiving hydraulic fluid, and below each diaphragm there is a space 3b for receiving fluid to be pumped.
  • the hydraulic fluid which flattens the diaphragm to produce a pumping movement, enters the chamber 3 through a passage 4 from a piston unit 5 operating in its own chamber.
  • the lower end of the passage 4 is flared outwardly at 6 to form a seat for a poppet 7.
  • the poppet 7 is connected to the diaphragm 2 and will move up and down with the diaphragm as the diaphragm flexes.
  • a diaphragm 2 is shown on a larger scale in Figure 3. It will be seen that the top face of the' diaphragm has an undercut recess 8 for receiving the poppet 7.
  • the poppet itself is shown on a larger scale in Figure 4, and it will be'seen that this has a flange 9 which is received in the recess 8. No additional fixing means are required. The flange 9 is retained in place by the lips of the undercut recess 8.
  • the edges of the diaphragm 2 have a right circular surface 10, and top and bottom flat annular surfaces 11 and 12. As shown in the righthand half of Figure 3, the diaphragm can easily be clamped in place by three easily machined housing components.
  • the central component 13 has a cylindrical bore, and the top and bottom components 14 and 15 just have flat surfaces which contact the flat surfaces 11 and 12.
  • the components 14 and 15 are drawn together by, for example, bolts to provide an axial compression in the edge bead of the diaphragm.
  • the poppet 7 has angled faces 16 which correspond to the angle of the outwardly flared passage portion 6.
  • the angle of the faces 16 and the portion 6 may be, for example, 45 to the axis of the passage and the axis of the diaphragm movement.
  • the underside of the diaphragm has a step 17. This is to prevent the area 18 of the diaphragm from touching the metal plate 15 when the diaphragm is flattened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP79302829A 1978-12-07 1979-12-07 Pompe à membrane pour pressions élevées Withdrawn EP0012584A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4763078 1978-12-07
GB7847630A GB2036166B (en) 1978-12-07 1978-12-07 High pressure pump

Publications (1)

Publication Number Publication Date
EP0012584A1 true EP0012584A1 (fr) 1980-06-25

Family

ID=10501579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79302829A Withdrawn EP0012584A1 (fr) 1978-12-07 1979-12-07 Pompe à membrane pour pressions élevées

Country Status (7)

Country Link
EP (1) EP0012584A1 (fr)
JP (1) JPS5584882A (fr)
AU (1) AU5351879A (fr)
DK (1) DK521779A (fr)
ES (1) ES8101726A1 (fr)
GB (1) GB2036166B (fr)
IE (1) IE49005B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775825A3 (fr) * 1995-11-27 1998-06-10 Ingersoll-Rand Company Membrane de pompe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474442A (en) * 1945-05-08 1949-06-28 Scovill Manufacturing Co Liquid dispensing device with bulb pump
US2476545A (en) * 1947-06-07 1949-07-19 Hunt Miller Co Bilge pump
US2659310A (en) * 1950-09-02 1953-11-17 Ryba Anton Electromagnetic pumping device for pumping fluids
FR1064799A (fr) * 1951-08-16 1954-05-18 Bataafsche Petroleum Corps creux divisé en deux compartiments par un diaphragme
US2928426A (en) * 1952-06-27 1960-03-15 Malsbary Mfg Company Diaphragm for pump
US2948223A (en) * 1958-01-21 1960-08-09 William H Mashinter Diaphragm type pump
US2970747A (en) * 1958-09-09 1961-02-07 Itt Compressor system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474442A (en) * 1945-05-08 1949-06-28 Scovill Manufacturing Co Liquid dispensing device with bulb pump
US2476545A (en) * 1947-06-07 1949-07-19 Hunt Miller Co Bilge pump
US2659310A (en) * 1950-09-02 1953-11-17 Ryba Anton Electromagnetic pumping device for pumping fluids
FR1064799A (fr) * 1951-08-16 1954-05-18 Bataafsche Petroleum Corps creux divisé en deux compartiments par un diaphragme
US2928426A (en) * 1952-06-27 1960-03-15 Malsbary Mfg Company Diaphragm for pump
US2948223A (en) * 1958-01-21 1960-08-09 William H Mashinter Diaphragm type pump
US2970747A (en) * 1958-09-09 1961-02-07 Itt Compressor system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775825A3 (fr) * 1995-11-27 1998-06-10 Ingersoll-Rand Company Membrane de pompe

Also Published As

Publication number Publication date
GB2036166B (en) 1982-12-08
ES486702A0 (es) 1980-12-16
JPS5584882A (en) 1980-06-26
IE49005B1 (en) 1985-07-10
DK521779A (da) 1980-06-08
GB2036166A (en) 1980-06-25
AU5351879A (en) 1980-06-12
ES8101726A1 (es) 1980-12-16
IE792350L (en) 1980-06-07

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Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LU NL SE

17P Request for examination filed

Effective date: 19801210

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: 19820421

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PRESTWICH, JOHN RICHARD