EP1985857A2 - Pompe solénoïde - Google Patents

Pompe solénoïde Download PDF

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Publication number
EP1985857A2
EP1985857A2 EP08251536A EP08251536A EP1985857A2 EP 1985857 A2 EP1985857 A2 EP 1985857A2 EP 08251536 A EP08251536 A EP 08251536A EP 08251536 A EP08251536 A EP 08251536A EP 1985857 A2 EP1985857 A2 EP 1985857A2
Authority
EP
European Patent Office
Prior art keywords
plunger
pump
electro
electric circuit
frequency
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Withdrawn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
EP08251536A
Other languages
German (de)
English (en)
Other versions
EP1985857A3 (fr
Inventor
Bao Ting Liu
Guo Ji Zhang
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.)
Johnson Electric SA
Original Assignee
Johnson Electric SA
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 Johnson Electric SA filed Critical Johnson Electric SA
Publication of EP1985857A2 publication Critical patent/EP1985857A2/fr
Publication of EP1985857A3 publication Critical patent/EP1985857A3/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Withdrawn legal-status Critical Current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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • 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
    • 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
    • F04B49/20—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 by changing the driving speed
    • 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
    • F04B2203/0404—Frequency of the electric current
    • 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
    • F04B2203/0406—Vibration

Definitions

  • This invention relates to solenoid pumps and more particularly to reducing or eliminating vibration and/or noise caused during operation.
  • Solenoid pumps are well known, and typically comprise a pump housing and a linear reciprocating plunger slidable therein to pump liquid between an inlet and an outlet.
  • the present invention seeks to overcome or mitigate this problem.
  • a method of reducing or eliminating vibration in a linear reciprocating solenoid pump comprising the steps of:
  • n is chosen to avoid operating the pump at its natural resonance frequency.
  • n is a whole number greater than 1.
  • the electric circuit includes a full bridge rectifier and a MOSFET to provide the increased frequency.
  • the electric circuit includes a bidirectional thyristor connected in series with the electro-motion means.
  • a solenoid pump comprising: a pump housing having a liquid inlet, a liquid outlet, and a plunger chamber; a plunger received for linear reciprocating movement in the plunger chamber; electro-motion means for electromagnetically moving the plunger; and an electric circuit for energizing the electro-motion means with a frequency n times greater than normal mains electricity frequency, where n is a number greater than
  • the plunger is hollow and includes a plunger head which is slidably received in the plunger chamber and an elongate plunger rod which is slidably received in a pump chamber.
  • the electric circuit includes a full bridge rectifier and a MOSFET for providing the increased frequency.
  • the electric circuit includes a bidirectional thyristor in series with a coil of the electro-motion means.
  • the increased frequency is different to the natural resonance frequency of the pump.
  • n is a whole number greater than 1.
  • a solenoid pump 10 which comprises a pump housing 12, a linear reciprocatable plunger 14, and electro-motion means 16 for moving the plunger 14 in a reciprocating manner.
  • the electro-motion means is preferably, in the form of a solenoid.
  • the pump housing 12 includes a hollow housing body 18 having two open ends 20 and a stepped-bore 22 therethrough.
  • a plunger chamber 24 is provided within the housing body 18 and is defined primarily by the stepped-bore 22.
  • a first one of the open ends 20 of the housing body 18 forms a liquid inlet port 26 for liquid flow into the plunger chamber 24, and an end cap 28 is fastened, typically by bolts, to the housing body 18 to close a second one of the open ends 20.
  • the end cap 28 includes a central rectilinear liquid-outlet passage 30 therethrough.
  • the liquid-outlet passage defines a pump chamber 32 leading from the plunger chamber 24.
  • the plunger chamber 24 is cylindrical and the pump chamber 32 is coaxially aligned with the cylinder axis of the plunger chamber 24.
  • the liquid outlet port 26 is shown as also being coaxially aligned.
  • the plunger 14 is hollow and comprises a plunger head 34 and an elongate hollow plunger rod 36 rigidly fixed to the plunger head 34.
  • the plunger head 34 includes a recess 35 with an opening in a base of the recess.
  • the plunger rod 36 includes an axially extending uniform through-bore 37, with one end being received in the opening in the base of the recess 15.
  • a lateral cross-section of the through-bore of the plunger rod 36 is smaller than a lateral cross-section of the recess of the plunger head 34. In this way, a stepped through-bore through the plunger 14 is formed by the recess of the plunger head 34 and the through-bore of the plunger rod 36.
  • the plunger head 34 is a sliding fit within the plunger chamber 24. Holes 41 are provided to equalize fluid pressure within the plunger chamber on either side of the plunger head.
  • a coiled return spring 38 is included within the plunger chamber 24.
  • the return spring 38 extends from the plunger head 34 to contact the first open end 20 adjacent to the liquid inlet port 26.
  • a step in the stepped base 22, provides a seal for the return spring 38.
  • the return spring 38 biases the plunger head 34 towards the pump chamber 32.
  • a coiled buffer spring 40 is also included within the plunger chamber 24, interposed between the plunger head 34 and the end cap 28.
  • the plunger rod 36 extends coaxially within the buffer spring 40.
  • the in use buffer spring 40 prevents the plunger head 34 from contacting the associated end cap 28.
  • a plate or disc 54 provides a seat for the buffer spring 40.
  • Disc 54 may be of a rubber based material to further dampen vibrations from the plunger 14 and buffer spring 40 being transferred to the end cap and housing.
  • the plunger rod 36 is dimensioned to be a clearance sliding fit within the pump chamber 32.
  • a seal 33 preferably in the form of a rubber O-ring, seals the plunger rod 36 to the pump chamber 32 while allowing the plunger rod to slide with respect to the pump chamber 32 along the plunger axis.
  • the seal 33 is held on a step in the pump chamber 32 by a seal retainer 43. In this way, the seal 33 also acts as a plunger guide, stabilising the plunger 14 during use.
  • the plunger rod 36 thus has an open end disposed within the pump chamber 32.
  • the open end is closed by a non-return valve 56 formed by a seal body 58 which is pressed against the open end of the plunger rod by a valve spring 60.
  • the non-return valve 56 allows fluid to enter the pump chamber 32 through the hollow plunger rod 36 but cannot exit the pump chamber via the plunger rod.
  • a restriction in the bore of the pump chamber 32 forms an outlet port which is fitted with a non-return valve 62 having a spring 60 and a seal body 58, which is pressed against the outlet port to prevent liquid entering the pump chamber 32 through the outlet port.
  • Spring 60 is held in the outlet passage 30 by a retaining tube pressed into the outlet passage 30.
  • plunger rod In operation, sliding movement of the plunger rod causes fluid to be pumped through the pump chamber. As the plunge rod is withdrawn partially from the pump chamber, liquid enters the pump chamber through the plunger rod to fill up the space left by the withdrawing plunger rod. When the plunger rod is moved in the opposite direction, to be inserted further into the pump chamber, the displaced liquid is expelled through the outlet port with the non-return valve preventing liquid movement in the opposite direction.
  • the electro-motion means 16 includes an electro-magnetic stator 42 comprised of an annular electromagnet 44 supported by and surrounding the housing body 18 of the solenoid pump 10 on an exterior surface thereof, an armature 46 comprised of the plunger head 34 and formed of an electromagnetic material, and an electric circuit 48 for energizing the electro-magnetic stator 42.
  • the electromagnet 44 is energized with electrical current in a pulsating manner.
  • This current when flowing through the coil of the electro-magnet, causes a magnetic field to be generated which, due to the electro-magnetic stator, causes the plunger to be drawn to the right (as shown in Fig. 1 ) against the urgings of the return spring 38 to align the plunger head, functioning as the armature, into the gap 45 formed in the magnetic path of the stator.
  • the current through the coil is turned off, the armature is released and the plunger is moved to the left (as shown in Fig. 1 ) under the resilient urgings of the return spring and as buffered by the buffer spring 40. Movement of the plunger head causes movement of the plunger rod as discussed above to pump liquid through the pump chamber.
  • the coil is connected to mains supply via a diode providing a half wave rectified waveform giving a simple pulse for each cycle of the mains power, thus also providing a half cycle rest period for the return spring to pump the liquid out of the pump chamber.
  • the present invention modifies the input wave form so as to increase the number of pulses per cycle of mains frequency while still giving sufficient rest time between pulses for the return spring to move the plunger when the electro-magnet relaxes so as to do useful work. Vibration is reduced by having a lower stroke length of the plunger but pump volume (capacity) is not sacrificed due to the higher pumping frequency.
  • FIG. 2 illustrates a first preferred circuit 48.
  • Mains power is connected across a full wave bridge rectifier 50 to generate the typical rectified waveform of Fig. 3(a) .
  • the output of the bridge rectifier 50 is applied to a series connected circuit of the solenoid 10 and a MOSFET 51.
  • a flywheel diode 72 and resistor 73 are placed across the solenoid.
  • a voltage divider resistor network, resistors 70, 71 are connected across the bridge output to provide a reduced voltage to the Gate terminal of the MOSFET 51.
  • the MOSFET turns ON and the solenoid is energized. Otherwise, the MOSFET is OFF and the solenoid id de-energized.
  • the ON/OFF time of the MOSFET is shown in Fig. 3(b) and the solenoid current wave form is shown in Fig. 3(c) where the decay current through the flywheel diode is noted.
  • the ON/OFF time of the MOSFET can be adjusted by changing the values of the divider resisters 70, 71.
  • the pump operates at 2 times the inputted mains power frequency.
  • the circuit of Fig. 4 illustrates another preferred circuit 48a.
  • AC mains frequency power is applied across a series circuit of the solenoid coil 10 and a bidirectional thyristor 52.
  • the input voltage waveform is shown in Fig. 5(a) .
  • Two resistors 74, 75 and a capacitor 76 are arranged to form a delay trigger circuit to the Gate terminal of the thyristor.
  • the thyristor is turned ON and the solenoid is energized.
  • the thyristor once triggered stays on until the current through it becomes zero (as occurs when the voltage changes polarity).
  • the ON/OFF time of the thyristor 52 is shown in Fig. 5(b) and the current through the solenoid is shown in Fig. 5(c) .
  • the solenoid is, of course, de-energized when the thyristor 52 turns OFF.
  • the solenoid Once the solenoid is energized, whether by positive or negative current, it will induce a magnetic field attracting the plunger, thus compressing the return spring. During the OFF time, the spring relaxes pushing the plunger into the pump chamber to pump the liquid. Thus again, the pump operates at twice mains frequency.
  • the drive circuits can be, in theory, applied to a standard solenoid pump, in practice, the plunger and springs are configured to operate at a desired frequency and the mass of the plunger is chosen to have a natural resonance frequency greater than the operating frequency but not significantly greater to give the plunger a certain momentum during operation. By simply changing the operating frequency, there is a possibility that the pump will not work or will go into natural resonance and generate uncontrolled vibrations.
  • resonance frequency is proportional to the square root of the reciprocal of mass
  • the plunger stroke length can be modified by changing the spring force and the electro-magnetic power of the solenoid.
  • the mass of the plunger can be easily altered by standard manufacturing or workshop techniques, for example by altering the material of manufacture or by removing material via machining.
  • the mass of the plunger and its operating amplitude are reduced, the pumping rate is not significantly impacted. Consequently, the reduced or eliminated vibration, resulting in improved reliability and longevity, is preferred.
  • n has been suggested above as being 2, n can be any number which is greater than 1. Also, preferably, n is a whole number. Ideally, n can be chosen to avoid the natural resonance frequency of the pump.
  • n may be 3 or even 4.
  • any circuit means can be provided for energizing the electro-magnetic stator of the electro-motion means, providing the amplitude of the plunger and the frequency of the electrical energization can be controlled and set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
EP08251536A 2007-04-28 2008-04-28 Pompe solénoïde Withdrawn EP1985857A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007101009465A CN101294556A (zh) 2007-04-28 2007-04-28 螺线管泵

Publications (2)

Publication Number Publication Date
EP1985857A2 true EP1985857A2 (fr) 2008-10-29
EP1985857A3 EP1985857A3 (fr) 2008-11-19

Family

ID=39591763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08251536A Withdrawn EP1985857A3 (fr) 2007-04-28 2008-04-28 Pompe solénoïde

Country Status (3)

Country Link
US (1) US20080267798A1 (fr)
EP (1) EP1985857A3 (fr)
CN (1) CN101294556A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013029133A1 (fr) * 2011-08-31 2013-03-07 Whirlpool S.A. Compresseur linéaire basé sur un mécanisme oscillant résonant
ITGE20120097A1 (it) * 2012-09-25 2014-03-26 A R S Elettromeccanica Srl Pompa a vibrazione
WO2016016031A1 (fr) 2014-07-31 2016-02-04 Siemens Aktiengesellschaft Réacteur linéaire et procédé pour faire fonctionner un tel réacteur linéaire
EP3037662A1 (fr) * 2014-12-23 2016-06-29 Werner Rogg Systeme de pompe pour milieux liquides et gazeux
WO2017005618A1 (fr) * 2015-07-03 2017-01-12 Nestec S.A. Système de commande pour pompe de machine de préparation de boissons

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107242B1 (fr) * 2008-04-01 2011-12-28 Societe Des Produits Nestle S.A. Appareil de distribution de boissons comprenant une pompe électromagnétique et procédé de contrôle de ladite pompe
US8182243B2 (en) * 2008-08-15 2012-05-22 Diversitech Corporation Condensate pump
EP2273117B1 (fr) * 2009-06-03 2013-08-14 Nestec S.A. Procédé de détection de la formation de calcaire dans une machine de préparation de boissons
US20130183174A1 (en) * 2010-10-01 2013-07-18 Franklin Electric Company, Inc. Solenoid pump
JP5419019B2 (ja) 2010-10-28 2014-02-19 Ｓｍｃ株式会社 ソレノイドポンプ
US8449274B1 (en) 2011-03-10 2013-05-28 Sielc Technologies Corporation Magnetic reciprocating pump
BRPI1103355A2 (pt) * 2011-07-04 2013-07-23 Whirlpool Sa dispositivo adaptador para compressor linear, e compressor provido do referido dispositivo
CN103867423B (zh) * 2012-12-10 2017-02-08 博世汽车柴油系统有限公司 一种控制用于驱动清洗泵的直流螺线管致动器的装置和方法
CN103527374B (zh) * 2013-10-22 2015-10-28 大连海事大学 线圈感应泵
US9518572B2 (en) * 2014-02-10 2016-12-13 Haier Us Appliance Solutions, Inc. Linear compressor
US9506460B2 (en) * 2014-02-10 2016-11-29 Haier Us Appliance Solutions, Inc. Linear compressor
US9429150B2 (en) * 2014-02-10 2016-08-30 Haier US Appliances Solutions, Inc. Linear compressor
CN105569894A (zh) * 2016-01-15 2016-05-11 吴庆宇 电磁供油燃油泵
CN109386447A (zh) * 2017-08-08 2019-02-26 三花亚威科电器设备（芜湖）有限公司 电磁泵
KR102611409B1 (ko) * 2018-07-26 2023-12-06 엘지전자 주식회사 펌프 조립체 및 이를 구비하는 조리기기

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461806A (en) * 1965-03-12 1969-08-19 Maurice Barthalon Reciprocating electric motor
FR2465903A1 (fr) * 1979-07-16 1981-03-27 Ulka Srl Pompe alternative electro-magnetique a piston
WO2002077453A1 (fr) * 2001-03-26 2002-10-03 Lg Electronics Inc. Appareil commandant l'entrainement destine a un compresseur alternatif
DE102004010846A1 (de) * 2004-03-05 2005-09-22 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zur Regelung des Ankerhubs in einem reversierenden Linearantrieb

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0444860Y2 (fr) * 1984-11-07 1992-10-22
ITUD20030162A1 (it) * 2003-07-30 2005-01-31 Invensys Controls Italy Srl Pompa elettromagnetica a nucleo oscillante.
US20070017672A1 (en) * 2005-07-22 2007-01-25 Schlumberger Technology Corporation Automatic Detection of Resonance Frequency of a Downhole System
US20060198744A1 (en) * 2005-03-03 2006-09-07 Carrier Corporation Skipping frequencies for variable speed controls

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461806A (en) * 1965-03-12 1969-08-19 Maurice Barthalon Reciprocating electric motor
FR2465903A1 (fr) * 1979-07-16 1981-03-27 Ulka Srl Pompe alternative electro-magnetique a piston
WO2002077453A1 (fr) * 2001-03-26 2002-10-03 Lg Electronics Inc. Appareil commandant l'entrainement destine a un compresseur alternatif
DE102004010846A1 (de) * 2004-03-05 2005-09-22 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung zur Regelung des Ankerhubs in einem reversierenden Linearantrieb

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013029133A1 (fr) * 2011-08-31 2013-03-07 Whirlpool S.A. Compresseur linéaire basé sur un mécanisme oscillant résonant
US9534591B2 (en) 2011-08-31 2017-01-03 Whirlpool S.A. Linear compressor based on resonant oscillating mechanism
ITGE20120097A1 (it) * 2012-09-25 2014-03-26 A R S Elettromeccanica Srl Pompa a vibrazione
EP2711548A3 (fr) * 2012-09-25 2014-04-02 ARS Elettromeccanica S.r.l. Pompe à vibration
WO2016016031A1 (fr) 2014-07-31 2016-02-04 Siemens Aktiengesellschaft Réacteur linéaire et procédé pour faire fonctionner un tel réacteur linéaire
DE102014215110A1 (de) 2014-07-31 2016-02-04 Siemens Aktiengesellschaft Linearaktor und Verfahren zum Betrieb eines solchen Linearaktors
EP3037662A1 (fr) * 2014-12-23 2016-06-29 Werner Rogg Systeme de pompe pour milieux liquides et gazeux
US10781802B2 (en) 2014-12-23 2020-09-22 Werner Rogg Pumping system for gaseous and liquid media
WO2017005618A1 (fr) * 2015-07-03 2017-01-12 Nestec S.A. Système de commande pour pompe de machine de préparation de boissons
RU2716912C2 (ru) * 2015-07-03 2020-03-17 Сосьете Де Продюи Нестле С.А. Система управления насосом устройства для приготовления напитка
AU2016289397B2 (en) * 2015-07-03 2020-08-13 Société des Produits Nestlé S.A. Control system for pump of beverage preparation machine
US10959566B2 (en) 2015-07-03 2021-03-30 Societe Des Produits Nestle S.A. Control system for pump of beverage preparation machine

Also Published As

Publication number Publication date
EP1985857A3 (fr) 2008-11-19
CN101294556A (zh) 2008-10-29
US20080267798A1 (en) 2008-10-30

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