EP0880649A4 - Dispositif a pompe alternative a entrainement magnetique direct, associe a une detection integrale de la pression et procede correspondant - Google Patents

Dispositif a pompe alternative a entrainement magnetique direct, associe a une detection integrale de la pression et procede correspondant

Info

Publication number
EP0880649A4
EP0880649A4 EP97904001A EP97904001A EP0880649A4 EP 0880649 A4 EP0880649 A4 EP 0880649A4 EP 97904001 A EP97904001 A EP 97904001A EP 97904001 A EP97904001 A EP 97904001A EP 0880649 A4 EP0880649 A4 EP 0880649A4
Authority
EP
European Patent Office
Prior art keywords
piston assembly
drive
chamber
level
driving force
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Withdrawn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
EP97904001A
Other languages
German (de)
English (en)
Other versions
EP0880649A1 (fr
Inventor
Thomas R Tullsen
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.)
Dionex Corp
Original Assignee
Dionex 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 Dionex Corp filed Critical Dionex Corp
Publication of EP0880649A1 publication Critical patent/EP0880649A1/fr
Publication of EP0880649A4 publication Critical patent/EP0880649A4/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Withdrawn legal-status Critical Current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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0407—Force
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet

Definitions

  • the spring augmented solenoid pumps cause several operational problems.
  • the coils of the return spring may rub against a piston shaft or other exposed surfaces during operation to substantially increase friction and severely hamper operation thereof.
  • the spring force acting on the piston must be overcome by the electromagnetic force driving the piston in the opposite direction during the during the push or flush stroke. This force imbalance tends to cause erratic fluid flow so that the pump flow rate is neither substantially constant nor smooth.
  • the refill or pull stroke may be too fast such that an internal cushion or bumper is necessary to absorb and cushion contact as the spring fully withdraws the piston from the chamber.
  • the method includes the steps of A) retaining the piston assembly at a first position along the path toward and away from the chamber in the presence of a first seal stiction formed between the seal and the piston assembly. This retainment is accomplished by applying a driving force at a first level to the piston assembly in a first direction opposite the hydraulic pressure force of the pumped fluid acting thereon in an opposite second direction.
  • the next step includes B) incrementally increasing or decreasing the driving force from the first level to a second level at which the piston assembly just overcomes the first seal stiction.
  • the piston assembly breaks the first seal stiction, and measurably moves in either the first direction or the second direction along the path away from the first position.
  • a drive current is applied to the solenoid coil in one direction to drive the piston assembly along the path in the first direction, and in a reverse direction to drive the piston assembly along the path in the opposite second direction.
  • the generated drive force applied to the piston assembly is proportionate to the drive current applied to the coil.
  • the drive force generally must be directed in the second direction combining the drive force with the hydraulic force to oppose the weight of the piston assembly.
  • the drive force may only need to be reduced, still directed in the second direction, from the drive force level required to retain the piston assembly relative chamber 13.
  • the drive force may have to be reversed in direction (i.e., in the first direction) .
  • the calculating step further includes the step of multiplying the sum of the second current and the first current by the empirical constant (C) to convert the current summation into the hydraulic pressure.
  • Another step includes subtracting the weight of the piston assembly from the hydraulic force value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Measuring Fluid Pressure (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP97904001A 1996-02-14 1997-01-28 Dispositif a pompe alternative a entrainement magnetique direct, associe a une detection integrale de la pression et procede correspondant Withdrawn EP0880649A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US60109296A 1996-02-14 1996-02-14
US601092 1996-02-14
PCT/US1997/001286 WO1997030288A2 (fr) 1996-02-14 1997-01-28 Dispositif a pompe alternative a entrainement magnetique direct, associe a une detection integrale de la pression et procede correspondant

Publications (2)

Publication Number Publication Date
EP0880649A1 EP0880649A1 (fr) 1998-12-02
EP0880649A4 true EP0880649A4 (fr) 2004-05-26

Family

ID=24406194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97904001A Withdrawn EP0880649A4 (fr) 1996-02-14 1997-01-28 Dispositif a pompe alternative a entrainement magnetique direct, associe a une detection integrale de la pression et procede correspondant

Country Status (5)

Country Link
EP (1) EP0880649A4 (fr)
JP (1) JP3248728B2 (fr)
AU (1) AU697945B2 (fr)
CA (1) CA2245889C (fr)
WO (1) WO1997030288A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856917B4 (de) 1998-12-10 2008-06-05 Robert Bosch Gmbh Pumpenaggregat
JP5277027B2 (ja) * 2009-03-11 2013-08-28 Ｊｘ日鉱日石エネルギー株式会社 微小流量液体ポンプ制御装置
JP6229704B2 (ja) * 2015-10-01 2017-11-15 トヨタ自動車株式会社 燃料ポンプ
DE102021103389A1 (de) 2021-02-12 2022-08-18 Dionex Softron Gmbh Verfahren und Systeme zum Bestimmen einer Charakteristik eines von einer Pumpe zugeführten Fluids

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200386A (ja) * 1985-02-28 1986-09-04 Yamatake Honeywell Co Ltd 電磁ポンプ
JPS62163305A (ja) * 1986-01-14 1987-07-20 Matsushita Electric Works Ltd 可動体の構造
JPS63243472A (ja) * 1987-03-27 1988-10-11 Takatsuki Denki Seisakusho:Kk 可動磁石式ダイヤフラムポンプ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3483959B2 (ja) * 1994-10-14 2004-01-06 Ｔｄｋ株式会社 磁石可動型リニアアクチュエータ及びポンプ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61200386A (ja) * 1985-02-28 1986-09-04 Yamatake Honeywell Co Ltd 電磁ポンプ
JPS62163305A (ja) * 1986-01-14 1987-07-20 Matsushita Electric Works Ltd 可動体の構造
JPS63243472A (ja) * 1987-03-27 1988-10-11 Takatsuki Denki Seisakusho:Kk 可動磁石式ダイヤフラムポンプ

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 0110, no. 28 (M - 557) 27 January 1987 (1987-01-27) *
PATENT ABSTRACTS OF JAPAN vol. 0120, no. 03 (E - 570) 7 January 1988 (1988-01-07) *
PATENT ABSTRACTS OF JAPAN vol. 0130, no. 33 (M - 789) 25 January 1989 (1989-01-25) *

Also Published As

Publication number Publication date
CA2245889C (fr) 2001-04-24
WO1997030288A2 (fr) 1997-08-21
JP3248728B2 (ja) 2002-01-21
WO1997030288A8 (fr) 2004-07-01
AU697945B2 (en) 1998-10-22
JPH11506185A (ja) 1999-06-02
EP0880649A1 (fr) 1998-12-02
CA2245889A1 (fr) 1997-08-21
AU1842197A (en) 1997-09-02

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Legal Events

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Effective date: 19980818

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