EP0288216B1 - Electrical fluid pump - Google Patents

Electrical fluid pump Download PDF

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Publication number
EP0288216B1
EP0288216B1 EP19880303388 EP88303388A EP0288216B1 EP 0288216 B1 EP0288216 B1 EP 0288216B1 EP 19880303388 EP19880303388 EP 19880303388 EP 88303388 A EP88303388 A EP 88303388A EP 0288216 B1 EP0288216 B1 EP 0288216B1
Authority
EP
European Patent Office
Prior art keywords
armature
piston
fluid
combination
guide
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.)
Expired - Lifetime
Application number
EP19880303388
Other languages
German (de)
French (fr)
Other versions
EP0288216A1 (en
Inventor
Jean Claude Buffet
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.)
Eaton SAM
Original Assignee
Eaton SAM
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
Priority to GB8709082 priority Critical
Priority to GB878709082A priority patent/GB8709082D0/en
Application filed by Eaton SAM filed Critical Eaton SAM
Publication of EP0288216A1 publication Critical patent/EP0288216A1/en
Application granted granted Critical
Publication of EP0288216B1 publication Critical patent/EP0288216B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/02Pressure lubrication using lubricating pumps
    • F01M2001/0207Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0223Electromagnetic pumps

Description

  • This invention relates to an electrical pump for fluids, eg hot water or for coffee machines, with economical outlay and power consumption.
  • According to a known pump, a generally cylindrical armature/piston combination which slides axially and has a generally axial internal bore to pass fluid from an inlet to an outlet, also has one or more radial bores between the axial bore and its exterior inside a sliding guide for the combination. In the state of the art represented by US-A-3348 489 or FR-A-2 233 877, the combination has axial external grooves for the same purpose.
  • The general purpose is to prevent fluid build-up between the combination and its guide. Such a build-up has a braking effect on the armature/piston combination due to pressure and viscosity, but is relieved by these prior art artifices. Unfortunately the bore is expensive to machine and the machining can form a burr (a jagged irregularity projecting from the hole) which tends to scrape and wear out at least the assembly and its guide. In spite of consequent expense, burrs or wear, the loss of force and power due to peripheral fluid build-up can amount to 50%, and so has typically been dealt with in this way. Also external grooves of the state of the art can be expensive and time consuming to produce by machining etc.
  • The invention aims also to minimize the peripheral fluid presence and consequent braking effect, but without causing a burr and/or incurring the expense of shaping the armature/piston combination. The reduction in braking effect can lead to greater noise and shocks being generated.
  • Accordingly the invention is set out in Claim 1. The armature/piston assembly guide is shaped according to one feature of the invention to facilitate peripheral fluid mobility. Also the piston face is equipped to counter the noise and shock generation. According to a preference of the invention, production of the downstream part or end of the combination is simplified. In the past it has been externally tapered or reduced in diameter by machining; which is quite expensive in time and loss of magnetic material. The machining of the guide, or other shaping is advantageous, then, even though the guide has to be radially thicker, with some loss of magnetic coupling to the armature.
    A preferred embodiment provides an armature assembly formed by a reduced diameter body which may be of a different, non-magnetic material or metal, crimped to the main body of the assembly. The axial bore must be continuous but the reduced diameter body can be machined or moulded, cast etc separately before the two pieces are crimped together. The preferred embodiments are now detailed with reference to the drawings, in which:
    • Figure 1 shows in diametrical section a pump embodying the invention;
    • Figures 2 and 3 show likewise an armature/piston piece, and its crimped together combination with a narrower downstream piece; and
    • Figure 4 shows a guide cross section.
  • Referring to Figure 1, a pump has an inlet port 1 from which fluid is pumped by an axially vibrating armature/piston combination 2 to an outlet port 3, through an axial bore 4 in the entire length of combination 2, an inlet valve 5 and an outlet valve 6 in an axial passage in the housing 7 leading to the outlet port 3.
  • The outlet valve 6 is merely a one-way passive or flow-responsive valve, but the inlet valve 5 is opened by separation of the piston part, ie by the leftward movements of armature/piston 2 in its vibrations. The leftward movements cause fluid to be transferred from inlet port 1 past the inlet valve 5 and thence to the outlet 3. The leftward armature movements are caused by repeated energizations of a solenoid coil 8 via a terminal T and act against a return spring 9. The repeated energizations can result conveniently from half-wave rectified ac, eg at 50 Hz, between the half-waves of which the spring returns the combination rightward to close inlet valve 5.
    Both valves 5 and 6 are spring closed by return springs 10 and 11, spring 10 being weaker than spring 9.
  • Unfortunately fluid unavoidably flows between the outside of the armature/piston and its guide 13, which can impede the armature vibrations. This tendency can be relieved, by measures described below.
  • As will also be appreciated, the wider part of the armature 2 comes to rest each return stroke against a shock absorber ring 15. By the above very desirable avoidance of the impeding of the vibrations, there is an unfortunate tendency to cause greater shocks which the invention aims to counter. Through ring 15 an elongated narrow part 16 of the armature extends, preferably via sealing O-rings 17 and 18, to abut and seat inlet valve 5. The state of the art is to machine the mild steel down from the wider to this narrower diameter which takes time, wastes material and may cause burrs or leave particles which can separate later and block flow-ways. Moreover mild steel is heavy, causing greater shocks. More machining away is involved to provide annular volume 12. Although a relatively long axial bore has to be provided, the narrow end according to this embodiment need not be magnetic or so heavy, especially if the aforesaid shocks are to be minimized. The magnetic circuit may comprise outside the coil outer encapsulation 19, a rectangular yoke (not shown) of two L-sectioned pieces crimped together along their corners, a first cylindrical internal part 20 outside the thin armature guide 13, a ring 21 magnetically connecting the yoke and cylinder 20, a second cylindrical internal part 22, and a ring 23 communicating cylinder 22 to the yoke.
  • The L-pieces have respective holes closely surrounding rings 21, 23.
  • Many alternative magnetic circuits are possible. The cylindrical magnetic gap 24 between the two cylindrical parts as well known attracts the armature adjacent to it, ie. leftward in Fig.1 against spring 9, whenever coil 8 is energized. The material used for the narrow part 16 of the armature therefore need not be magnetic since it cannot appreciably interact with gap 24 or other magnetic circuitry.
  • Referring to the desirable reduction of flows external to the combination piston, the guide 13 has eg. five internal longitudinal ribs 25 (see also Fig.4) on which the sliding armature bears and between which any trapped fluid can readily return (as shown by the flow line arrows 25') to the pumped stream travelling rightwards through the bore. The ribs can be provided without machining and at low cost in the mould of plastic guide 13, and free particles are unlikely and not metallic. There should be longitudinal ribs or grooves or non-circular irregularities in the guide providing bearing surfaces, and no trapped space, but instead, a continuous communication between all peripheral points and the main axial pumped stream. The longitudinal irregularities in the guide either can be strictly parallel to the axis, or can be oblique or helical or otherwise to provide this longitudinal communication, and hence lack of pressure build-up and viscosity drag, while enabling efficient piston effect and hence pumping action.
    The armature/piston can be preferably in two parts as shown in Figs. 2 and 3, while having the inventive elongated irregularities of Fig 4 or variations thereof. The pressure reducing irregularities in the guide are best seen in the transverse cross-sectional view of Fig 4, but they are longitudinal in nature, being grooves or ribs or corners either parallel to the axis on having an axially directed component (eg. helical irregularities in the guide).
  • Referring to Fig. 2 a wide part 26 of the armature/piston has a central bore 27 and a holding portion 28, the top of which has an annular groove 29 to surround a lip 30 which can be crimped inwards by a suitable tool (not shown). The section of bore 31 of holding part 28 serves to accommodate a non-magnetic part 32 (eg. of brass or lighter plastics as suitable) shown in Figs 1 and 3. Part 32 has a waist 33 to accommodate in fluid-tight manner an annulus of crimped-in material from lip 30 as can be seen in Fig. 3.
  • The end 34 of part 32 is shaped to serve as a valve seat for inlet valve 5, Fig. 1. The inlet end 35 of wide part 26 may be flared to promote flow and have a circular projection to seat and hold the return spring 9. No ribs or grooves in the wide part of the armature need be present, such flow-conducive shapings applied to the guide only are adequate. Not only is the narrow part provided without necessity to machine down the wide part, but boring only of shorter axial lengths is needed.

Claims (5)

  1. A fluid pump comprising a reciprocating armature/piston combination, through a bore in which the pumped fluid passes, wherein fluid tending to become trapped between the internal walls of the guide (13) and the external wall of the wide part (26) of the armature/piston combination (2) is instead returned to the pumped stream, by means of a shaping composing cross-sectional differential or relative irregularities between said internal and external walls, providing continuous longitudinal fluid communication between each end of the armature/piston; characterised in that said irregularities are non-circular irregularities (25) in the guide (13), which nevertheless provides a bearing surface for the reciprocation of the armature/piston (2), ; and in that shock or noise caused by reduction of braking by the resulting reduction of trapped fluid, is countered by a shock-absorber ring (15) and any necessary sealing rings (17,18) acting on a transverse face (29,30) of the wide part (26) of the piston.
  2. A fluid pump according to Claim 1 wherein the reciprocating armature/piston combination has a relatively narrow extension (32) not abutted by said rings but passing therethrough, which seats and unseats a valve (5), wherein the extension projects axially from said transverse face (29,30) of the armature, and is a separate bored non-magnetic piece crimped (30, 33) or otherwise attached to a wide part (26) which is magnetic.
  3. A fluid pump according to Claim 2 comprising a waist (33) in the axial extension (32) receiving a crimped in portion (30) of said transverse face of the wide part (26) of the combination.
  4. A fluid pump according to any of Claims 1-3, wherein the non-circular irregularities are longitudinal guide ribs (25) extending along the inside wall of the armature guide.
  5. A fluid pump according to any of Claims 1-4 having series inlet and outlet valves on the downstream side of the combination, which are passive but biased towards closure positions.
EP19880303388 1987-04-15 1988-04-14 Electrical fluid pump Expired - Lifetime EP0288216B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8709082 1987-04-15
GB878709082A GB8709082D0 (en) 1987-04-15 1987-04-15 Electrical fluid pump

Publications (2)

Publication Number Publication Date
EP0288216A1 EP0288216A1 (en) 1988-10-26
EP0288216B1 true EP0288216B1 (en) 1992-04-15

Family

ID=10615907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880303388 Expired - Lifetime EP0288216B1 (en) 1987-04-15 1988-04-14 Electrical fluid pump

Country Status (4)

Country Link
EP (1) EP0288216B1 (en)
DE (1) DE3870017D1 (en)
ES (1) ES2030856T3 (en)
GB (1) GB8709082D0 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005048765A1 (en) * 2005-10-10 2007-04-12 Aweco Appliance Systems Gmbh & Co. Kg Oscillating anchor pump used in household appliances, e.g. coffee machines comprises a sliding surface formed as a sealing surface for sealing the cylinder of a pump housing during axial displacement of a plunger using a sealing element
DE102010044775A1 (en) 2009-09-09 2011-03-10 Rudolf Lonski The vibration pump
DE202011050599U1 (en) 2011-07-01 2012-10-09 Wik Far East Ltd. liquid pump
DE202011050601U1 (en) 2011-07-01 2012-10-09 Wik Far East Ltd. liquid pump
DE202011050598U1 (en) 2011-07-01 2012-10-09 Wik Far East Ltd. liquid pump
WO2013004620A1 (en) 2011-07-01 2013-01-10 Wik Far East Ltd. Reciprocating piston pump with magnetic drive
US8733230B2 (en) 2008-05-28 2014-05-27 Nestec S.A. Pump for liquid beverage preparation devices
DE102013107482A1 (en) * 2013-07-15 2015-01-15 Sysko AG Systeme und Komponenten Piston for a vibration tank pump
WO2015007429A1 (en) * 2013-07-15 2015-01-22 Sysko Ag Piston for a vibrating armature pump

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RU2062909C1 (en) * 1993-04-21 1996-06-27 Акционерное общество закрытого типа "Биотехинвест" Vibratory pump
DE4437670C1 (en) * 1994-10-21 1996-04-04 Samaro Eng & Handel Pump for pumping liquids
US5567131A (en) * 1995-04-20 1996-10-22 Gorman-Rupp Industries Spring biased check valve for an electromagnetically driven oscillating pump
IT1299987B1 (en) * 1998-04-27 2000-04-04 Magneti Marelli Spa Positive displacement pump.
IT246634Y1 (en) 1999-04-09 2002-04-09 Ulka Srl Composite piston for a vibration pump
ITMI20010420A1 (en) * 2001-03-01 2002-09-02 Inc Dell Orto S P A Pump-controlled electromagnet
FR2823260B1 (en) * 2001-04-04 2003-12-19 Marwal Systems Dosing and dispensing pump of a liquid
ITMI20020271U1 (en) * 2002-05-23 2003-11-24 C E M E Engineering S P A electric improved
ITUD20030162A1 (en) * 2003-07-30 2005-01-31 Invensys Controls Italy Srl electromagnetic pump with oscillating core.
CH703076B1 (en) * 2003-12-17 2011-11-15 Gotec S A Pump with cartridge.
ITMI20050688A1 (en) * 2005-04-18 2006-10-19 Dellorto Spa A fuel supply system for internal combustion engines and pump-injector group electromagnetically actuated used in this facility
UA84716C2 (en) 2006-05-06 2008-11-25 Александр Сергеевич Баринин Back valve of vibration piston pump
DE102007007297A1 (en) 2007-02-14 2008-08-21 Saia-Burgess Dresden Gmbh Oscillating piston pump for producing high pressure and flow rates of liquids in e.g. espresso machine, has sealant provided for hydraulic separation of compression chamber from drive unit, and extending partially around piston
DE202007019534U1 (en) 2007-02-14 2013-06-26 Johnson Electric Dresden Gmbh Piston pump
EP2122167B1 (en) 2007-03-15 2011-02-23 Ceme S.p.A. Hydraulic-electromagnetic motor pump with floating piston
CN101344083B (en) 2008-03-10 2010-06-16 熊颖申 Novel piston used in plunger type water pump
AT539261T (en) * 2008-04-01 2012-01-15 Nestle Sa Beverage dispenser with an electromagnetically driven pump and method for controlling the pump
IT1392178B1 (en) * 2008-12-10 2012-02-22 Olab Srl The vibration pump particularly for dispensing low and medium viscosity fluids incompressible '.
DE102009006577A1 (en) * 2009-01-29 2010-08-05 Bleckmann Gmbh & Co. Kg Heating system with heating unit and integrated pump
ES2432159T3 (en) 2009-06-03 2013-12-02 Nestec S.A. Process to detect the formation of lime in a machine for the preparation of beverages
CA2790833A1 (en) * 2010-03-05 2011-09-09 Nestec S.A. Reduction of pump nuisance
ITGE20120097A1 (en) * 2012-09-25 2014-03-26 A R S Elettromeccanica Srl Vibration pump
DE102012020274B4 (en) 2012-10-17 2018-10-31 Thomas Magnete Gmbh Electromagnetically driven reciprocating pump with damping element
ES2442618B1 (en) * 2013-11-06 2014-09-02 Teylor Intelligent Processes, S.L. vibrating piston pump
DE102013112306A1 (en) 2013-11-08 2015-05-13 Pierburg Gmbh Magnetic pump for an auxiliary unit of a vehicle and method for controlling a magnetic pump for an auxiliary unit
WO2016139531A1 (en) * 2015-03-05 2016-09-09 Ode S.R.L. Hydraulic vibration pump for coffee machines or beverage vending machines
DE102015105316A1 (en) * 2015-04-08 2016-10-13 Sysko Ag The vibration pump
DE102015107207A1 (en) 2015-05-08 2016-11-10 Pierburg Gmbh Magnetic pump for an auxiliary unit of a vehicle
IT201700060837A1 (en) * 2017-06-05 2018-12-05 Ceme S P A Electromagnetic hydraulic motor pump with floating piston
WO2019166954A1 (en) * 2018-02-27 2019-09-06 Elbi International S.P.A. Vibration pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348489A (en) * 1965-01-21 1967-10-24 Meyer Ernst Induction pump
CH549896A (en) * 1972-09-22 1974-05-31 Landis & Gyr Ag Oscillating armature - piston pump.
FR2233877A5 (en) * 1973-06-15 1975-01-10 Stasse Roland Electromagnetically actuated lubricating pump - piston and cylinder cooled by circulation of excess lubricant
PT65854B (en) * 1975-11-21 1978-05-15 Ignacio Perez Portabella Electro-magnetic pump
JPS54117911A (en) * 1978-03-04 1979-09-13 Nippon Kontorooru Kougiyou Kk Automatic pressure governing system electromagnetic pump
IT1130947B (en) * 1980-03-10 1986-06-18 De Dionigi Manlio Improvements to alternative electromagnetic pumps in particular for non-viscous fluids

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005048765A1 (en) * 2005-10-10 2007-04-12 Aweco Appliance Systems Gmbh & Co. Kg Oscillating anchor pump used in household appliances, e.g. coffee machines comprises a sliding surface formed as a sealing surface for sealing the cylinder of a pump housing during axial displacement of a plunger using a sealing element
US8733230B2 (en) 2008-05-28 2014-05-27 Nestec S.A. Pump for liquid beverage preparation devices
DE102010044775A1 (en) 2009-09-09 2011-03-10 Rudolf Lonski The vibration pump
CN102597517A (en) * 2009-09-09 2012-07-18 租赁联盟哈拉德施罗特和西斯科股份公司 Vibrating armature pump
WO2011029577A1 (en) 2009-09-09 2011-03-17 Rudolf Lonski Vibrating armature pump
DE202011050599U1 (en) 2011-07-01 2012-10-09 Wik Far East Ltd. liquid pump
DE202011050601U1 (en) 2011-07-01 2012-10-09 Wik Far East Ltd. liquid pump
DE202011050598U1 (en) 2011-07-01 2012-10-09 Wik Far East Ltd. liquid pump
WO2013004620A1 (en) 2011-07-01 2013-01-10 Wik Far East Ltd. Reciprocating piston pump with magnetic drive
DE102013107482A1 (en) * 2013-07-15 2015-01-15 Sysko AG Systeme und Komponenten Piston for a vibration tank pump
WO2015007429A1 (en) * 2013-07-15 2015-01-22 Sysko Ag Piston for a vibrating armature pump

Also Published As

Publication number Publication date
DE3870017D1 (en) 1992-05-21
ES2030856T3 (en) 1992-11-16
EP0288216A1 (en) 1988-10-26
GB8709082D0 (en) 1987-05-20

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