NO20130896A1 - Dosing pump device - Google Patents

Dosing pump device Download PDF

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Publication number
NO20130896A1
NO20130896A1 NO20130896A NO20130896A NO20130896A1 NO 20130896 A1 NO20130896 A1 NO 20130896A1 NO 20130896 A NO20130896 A NO 20130896A NO 20130896 A NO20130896 A NO 20130896A NO 20130896 A1 NO20130896 A1 NO 20130896A1
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Norway
Prior art keywords
piston
spring
stroke
pump
stroke length
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Application number
NO20130896A
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Norwegian (no)
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NO335905B1 (en
Inventor
Loyd Arve Nornes
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Loyd Arve Nornes
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Publication date
Application filed by Loyd Arve Nornes filed Critical Loyd Arve Nornes
Priority to NO20130896A priority Critical patent/NO335905B1/en
Priority to US14/899,373 priority patent/US20160146198A1/en
Priority to PCT/NO2014/050109 priority patent/WO2014209128A1/en
Priority to EP14817559.9A priority patent/EP3014120A4/en
Publication of NO20130896A1 publication Critical patent/NO20130896A1/en
Publication of NO335905B1 publication Critical patent/NO335905B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/02—Pumps peculiar thereto
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/28—Control of machines or pumps with stationary cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/831—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0652—Biofuels, e.g. plant oils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0652—Biofuels, e.g. plant oils
    • F02D19/0655—Biofuels, e.g. plant oils at least one fuel being an alcohol, e.g. ethanol
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0684—High pressure fuel injection systems; Details on pumps, rails or the arrangement of valves in the fuel supply and return systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/128—Driving 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/143—Cylinders
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/16—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having two or more sets of cylinders or pistons
    • 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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • 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
    • F04B5/00—Machines or pumps with differential-surface pistons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

Anordning ved en doseringspumpe (1) omfattende i det minste et første stempel (4) og et andre stempel (6) som er forskyvbare i en første sylinderboring (10) respektive i en andre sylinderboring (12) og hvor de minst to stemplene (4, 6) har en felles drivanordning (30), og hvor det andre stemplet (6) er forskyvbart koplet til og forskyves med det første stemplet (4) i en andel av det første stemplets (4) slaglengde.Device at a metering pump (1) comprising at least a first piston (4) and a second piston (6) which are displaceable in a first cylinder bore (10) and in a second cylinder bore (12), respectively, and wherein the at least two pistons (4) , 6) has a common drive device (30), and wherein the second piston (6) is displaceably connected and displaced by the first piston (4) in a proportion of the stroke of the first piston (4).

Description

ANORDING VED DOSERINGSPUMPE DEVICE FOR DOSING PUMP

Denne oppfinnelsen vedrører en doseringspumpe. Nærmere bestemt dreier det seg om en doseringspumpe omfattende i det minste et første stempel og et andre stempel som er forskyvbare i en første sylinderboring respektive i en andre sylinderboring, og hvor de minst to stempler har en felles drivanordning. This invention relates to a dosing pump. More specifically, it concerns a dosing pump comprising at least a first piston and a second piston which are displaceable in a first cylinder bore and in a second cylinder bore respectively, and where the at least two pistons have a common drive device.

Doseringspumper er kjent i en rekke utførelser for eksempel i form av stempelpumper hvor stemplets slaglengde ofte kan reguleres for å styre doseringsmengden. Dosing pumps are known in a number of designs, for example in the form of piston pumps where the stroke length of the piston can often be regulated to control the dosage amount.

Når to eller flere væsker skal blandes i et gitt forhold, er det vanlig å anvende to doseringspumper hvor leveringsmengden kan innstilles i ønsket forhold. Eksempler på væsker som kan blandes er etanol til en biodrivstoffblanding. When two or more liquids are to be mixed in a given ratio, it is common to use two dosing pumps where the delivery quantity can be set in the desired ratio. Examples of liquids that can be mixed are ethanol for a biofuel mixture.

Det er også kjent å anvende stempelpumper som har et stempel med relativt stor diameter og et stempel med relativt liten diameter. Stemplene drives av en felles driv-enhet og har samme slaglengde. Doseringsforholdet bestemmes av det relative forhold mellom stemplenes areal og er derved fast. Patentskrift US 20070286754 viser et eksempel på en slik doseringspumpe hvor to doseringsstempler er koplet til et drivs-tempel og har felles slaglengde. It is also known to use piston pumps which have a piston with a relatively large diameter and a piston with a relatively small diameter. The pistons are driven by a common drive unit and have the same stroke length. The dosing ratio is determined by the relative ratio between the areas of the pistons and is thereby fixed. Patent document US 20070286754 shows an example of such a dosing pump where two dosing pistons are connected to a drive piston and have a common stroke length.

Oppfinnelsen har til formål å avhjelpe eller redusere i det minste én av ulempene ved kjent teknikk. The purpose of the invention is to remedy or reduce at least one of the disadvantages of known technology.

Formålet oppnås i henhold til oppfinnelsen ved de trekk som er angitt i nedenstående beskrivelse og i de etterfølgende patentkrav. The purpose is achieved according to the invention by the features indicated in the description below and in the subsequent patent claims.

Det er tilveiebrakt en doseringspumpe omfattende i det minste et første stempel og et andre stempel som er forskyvbare i en første sylinderboring respektive i en andre sylinderboring, og hvor de minst to stempler har en felles drivanordning, og hvor doseringspumpen kjennetegnes ved at det andre stemplet er forskyvbart koplet til og forskyves med det første stemplet i en andel av det første stemplets slaglengde. A dosing pump is provided comprising at least a first piston and a second piston which are displaceable in a first cylinder bore and in a second cylinder bore respectively, and where the at least two pistons have a common drive device, and where the dosing pump is characterized by the fact that the second piston is displaceably connected to and displaced with the first piston in a proportion of the first piston's stroke length.

Begge sylinderboringer er forsynt med hver sin innløpsventil og utløpsventil. I sin enk-leste form kan disse være selvstyrte tilbakeslagsventiler, men mer kompliserte styrte ventiler kan i noen tilfeller være hensiktsmessig. Both cylinder bores are each equipped with an inlet valve and an outlet valve. In their plain-read form, these can be self-controlled non-return valves, but more complicated controlled valves can in some cases be appropriate.

I én utførelsesform av doseringspumpen kan det andre stemplet ha en fast slaglengde. I denne utførelsesformen er det således det første stemplets slaglengde i pumperetningen som er justerbar og som regulerer et doseringsforhold mellom en første væske og en andre væske. In one embodiment of the dosing pump, the second piston may have a fixed stroke length. In this embodiment, it is thus the stroke length of the first piston in the pumping direction which is adjustable and which regulates a dosage ratio between a first liquid and a second liquid.

Det er imidlertid mulig å justere hvor langt det første stempel returnerer i sugeretningen for derved å endre det andre stemplets slaglengde. Det andre stemplets slaglengde er derved justerbar. Se en mer utførlig forklaring i den spesielle delen av be-skrivelsen. However, it is possible to adjust how far the first piston returns in the direction of suction in order to thereby change the second piston's stroke length. The second piston's stroke length is thereby adjustable. See a more detailed explanation in the special part of the description.

Det er mulig å begrense det første stemplets slaglengde slik at begge stempler har samme slaglengde eller at slaglengden til det første stemplet reguleres til å være så kort at det andre stempel ikke forskyves. It is possible to limit the stroke length of the first piston so that both pistons have the same stroke length or that the stroke length of the first piston is regulated to be so short that the second piston is not displaced.

Det andre stemplet kan forskyves i pumperetningen av ei første fjær som er koplet til det første stemplet. I sugeretningen kan det andre stemplet forskyves av ei andre fjær som fortrinnsvis spenner mellom det andre stemplet og et pumpehus. The second piston can be displaced in the pumping direction by a first spring which is connected to the first piston. In the suction direction, the second piston can be displaced by a second spring which preferably spans between the second piston and a pump housing.

Den første fjæra er typisk utformet med en høyere fjærkonstant enn den andre fjæra og er derved dimensjonert til å kunne utøve en større kraft enn den andre fjæra. Så lenge den første fjæra spenner mot det andre stemplet vil det andre stemplet forskyves i pumperetningen eller ligge an mot pumpehuset. Når det første stemplet forskyves i sin sugeretning og den første fjæra er spent ut til sin frie lengde, forskyves det andre stemplet i sin sugeretning av den andre fjæra. Den første fjæras frie lengde kan således begrense det andre stemplets slaglengde. The first spring is typically designed with a higher spring constant than the second spring and is thereby dimensioned to be able to exert a greater force than the second spring. As long as the first spring spans the second piston, the second piston will be displaced in the direction of the pump or rest against the pump housing. When the first piston is displaced in its suction direction and the first spring is stretched to its free length, the second piston is displaced in its suction direction by the second spring. The free length of the first spring can thus limit the stroke of the second piston.

Det første stemplet og det andre stemplet kan ha en felles lengdeakse. I denne fore-trukne utførelsesformen er det andre stemplet utformet som et på det første stemplet, forskyvbart ringstempel. The first piston and the second piston may have a common longitudinal axis. In this preferred embodiment, the second piston is designed as a displaceable ring piston on the first piston.

I en alternativ utførelsesform er det andre stemplets slaglengde i pumperetningen begrenset av en stopper på det første stemplet. Den andre fjæra er da overflødig idet stopperen kommer til anslag mot og trekker det andre stemplet med seg i sugeretningen. In an alternative embodiment, the stroke length of the second piston in the pumping direction is limited by a stop on the first piston. The second spring is then redundant as the stopper comes to rest against and pulls the second piston with it in the direction of suction.

Anordningen ifølge oppfinnelsen tilveiebringer en doseringspumpe for i det minste to væsker hvor doseringsforholdet enkelt kan endres, også under drift, og hvor én driv-enhet er tilstrekkelig til å drive begge stempel. Sammenlignet med doseringspumper ifølge kjent teknikk hvor to eller flere væsker skal blandes, oppviser anordningen en vesentlig forenkling. The device according to the invention provides a dosing pump for at least two liquids where the dosing ratio can be easily changed, also during operation, and where one drive unit is sufficient to drive both pistons. Compared to dosing pumps according to known technology where two or more liquids are to be mixed, the device shows a significant simplification.

I det etterfølgende beskrives et eksempel på en foretrukket utførelsesform som er anskueliggjort på medfølgende tegninger, hvor: Fig. 1 viser en doseringspumpe i henhold til oppfinnelsen, idet både et første og et andre stempel befinner seg i sine respektive utgangsposisjoner hvor pumpeslaget starter; Fig. 2 viser det samme som i fig. 1, men her er begge stemplene under forskyv-ning i sine pumpeslag; Fig. 3 viser det samme som i fig. 2, men her har det andre stemplet kommet til sin In what follows, an example of a preferred embodiment is described which is visualized in the accompanying drawings, where: Fig. 1 shows a dosing pump according to the invention, with both a first and a second piston located in their respective starting positions where the pump stroke starts; Fig. 2 shows the same as in fig. 1, but here both pistons are being displaced in their pump strokes; Fig. 3 shows the same as in fig. 2, but here the second stamp has come into its own

endeposisjon i pumpeslaget; end position of the pump stroke;

Fig. 4. viser det samme som i fig. 3, men her fortsetter det første stemplet sitt Fig. 4 shows the same as in fig. 3, but here the first stamp continues its work

pumpeslag mens det andre stemplet er stasjonært; og pump stroke while the second piston is stationary; and

Fig. 5 viser doseringspumpen i et alternativt utførelseseksempel hvor doseringspumpen er tilrettelagt for drift fra en drivanordning med fast slaglengde. Fig. 5 shows the dosing pump in an alternative design example where the dosing pump is arranged for operation from a drive device with a fixed stroke length.

På tegningene betegner henvisningstallet 1 en doseringspumpe som omfatter et pumpehus 2, et første stempel 4 og et andre stempel 6. Det andre stemplet 6, som utgjør et ringstempel, omkranser det første stemplet 4. Begge er forskyvbare langs en felles lengdeakse 8 i pumpehuset 2. In the drawings, the reference number 1 denotes a dosing pump comprising a pump housing 2, a first piston 4 and a second piston 6. The second piston 6, which constitutes an annular piston, surrounds the first piston 4. Both are displaceable along a common longitudinal axis 8 in the pump housing 2 .

Det første stemplet 4 er tettende anbrakt i en første sylinderboring 10 i pumpehuset 2. Det andre stemplet 6 er tettende anbrakt i en andre sylinderboring 12 i pumpehuset 2. Den andre sylinderboring 12 har større diameter enn den første sylinderboring 10. Begge stemplene 4 og 6 er enkeltvirkende. I og for seg nødvendige stempel-tetninger er ikke vist. The first piston 4 is fitted sealingly in a first cylinder bore 10 in the pump housing 2. The second piston 6 is fitted sealingly in a second cylinder bore 12 in the pump housing 2. The second cylinder bore 12 has a larger diameter than the first cylinder bore 10. Both pistons 4 and 6 is single-acting. Per se necessary piston seals are not shown.

Et første sylinderkammer 14 er tildannet i den første sylinderboring 10 mellom det første stemplet 4 og et endelokk 16, mens et andre sylinderkammer 18 er tildannet i den andre sylinderboring 12 omkring det første stemplet 4, mellom det andre stemplet 6 og en brystning 20 i pumpehuset 2. A first cylinder chamber 14 is formed in the first cylinder bore 10 between the first piston 4 and an end cap 16, while a second cylinder chamber 18 is formed in the second cylinder bore 12 around the first piston 4, between the second piston 6 and a parapet 20 in the pump housing 2.

Ei første fjær 22 befinner seg i den andre sylinderboringen 12 mellom det andre stemplet 6 på den side som vender bort fra det andre sylinderkammeret 18, og en flens 24 på det første stemplet 4. Ei andre fjær 26 befinner seg i en fjærboring 19 som utgjør en utviding av den første sylinderboringen 10, mellom det andre stemplet 6 på motstående side av den første fjæra 22, og en fjærbrystning 28 i pumpehuset 2. Den første fjæra 22 har en høyere fjærkonstant enn den andre fjæra 26. A first spring 22 is located in the second cylinder bore 12 between the second piston 6 on the side facing away from the second cylinder chamber 18, and a flange 24 on the first piston 4. A second spring 26 is located in a spring bore 19 which constitutes an extension of the first cylinder bore 10, between the second piston 6 on the opposite side of the first spring 22, and a spring breast 28 in the pump housing 2. The first spring 22 has a higher spring constant than the second spring 26.

Det første stemplet 4 og derved også det andre stemplet 6 drives i en frem- og tilba-kegående bevegelse av en drivanordning 30 som fortrinnsvis har regulerbar slaglengde og vendeposisjoner. Drivanordningen 30 kan for eksempel være mekanisk, hydrau-lisk, pneumatisk eller elektrisk drevet. Drivanordningen 30 utfører et pumpeslag når stemplet 4 forskyves i sylinderboringen 10 mot endelokket 16, og drivanordningen 30 utfører et sugeslag når stemplet 4 forskyves i motsatt retning av pumpeslaget. The first piston 4 and thereby also the second piston 6 is driven in a forward and backward movement by a drive device 30 which preferably has adjustable stroke length and turning positions. The drive device 30 can, for example, be mechanically, hydraulically, pneumatically or electrically driven. The drive device 30 performs a pump stroke when the piston 4 is displaced in the cylinder bore 10 towards the end cap 16, and the drive device 30 performs a suction stroke when the piston 4 is displaced in the opposite direction of the pump stroke.

Det første sylinderkammeret 14 tilføres en første væske via en første innstrømnings-ventil 32 mens det andre sylinderkammeret 18 tilføres en andre væske via en andre innstrømningsventil 34. Den første og den andre innstrømningsventilen 32, 34 er koplet til hver sine ikke viste væskebeholdere. The first cylinder chamber 14 is supplied with a first liquid via a first inflow valve 32, while the second cylinder chamber 18 is supplied with a second liquid via a second inflow valve 34. The first and the second inflow valves 32, 34 are each connected to their own liquid containers, not shown.

Tilsvarende strømmer den første væske ut fra det første sylinderkammeret 14 via en første utstrømningsventil 36 og fra det andre sylinderkammeret 18 via en andre ut-strømningsventil 38. Utstrømningsventilene 36, 38 munner i dette viste utførelsesek-sempel ut i et blandekar 40. Både innstrømningsventilene 32, 34 og utstrømnings-ventilene 36, 38 utgjøres her av tilbakeslagsventiler. Den første væsken og den andre væsken i blandekaret 40 kan ledes gjennom en statisk mikser (ikke vist). Correspondingly, the first liquid flows out from the first cylinder chamber 14 via a first outflow valve 36 and from the second cylinder chamber 18 via a second outflow valve 38. The outflow valves 36, 38 in this shown embodiment open into a mixing vessel 40. Both the inflow valves 32 , 34 and the outflow valves 36, 38 are constituted here by non-return valves. The first liquid and the second liquid in the mixing vessel 40 may be passed through a static mixer (not shown).

Et første pumpevolum som befinner seg i det første sylinderkammeret 14 bestemmes av det første stempels 4 slaglengde. Slaglengden bestemmes av det første stemplets 4 relative vendeposisjoner i pumpehuset 2. A first pump volume located in the first cylinder chamber 14 is determined by the stroke length of the first piston 4. The stroke length is determined by the relative turning positions of the first piston 4 in the pump housing 2.

Et andre pumpevolum som sammenfaller med det andre sylinderkammeret 18, i og med at pumpeslagets endeposisjon for det andre stemplet 6 bestemmes av et anslag mot brystningen 20 og derved er fast, bestemmes av det andre stemplets 6 vendeposisjon relativt pumpehuset 2 før pumpeslaget finner sted. Stemplets 6 vendeposisjon bestemmes av stemplets 4 vendeposisjon. A second pump volume which coincides with the second cylinder chamber 18, in that the end position of the pump stroke for the second piston 6 is determined by a stop against the parapet 20 and is thereby fixed, is determined by the turning position of the second piston 6 relative to the pump housing 2 before the pump stroke takes place. The turning position of the piston 6 is determined by the turning position of the piston 4.

I fig. 1 er begge sylinderkamrene 14, 18 fylt med væske og pumpeslaget startes. Mens begge stemplene 4, 6 forskyves slik det er vist i fig. 2, doseres den første væsken og den andre væsken i denne delen av pumpeslaget i et forhold som er gitt av det første stemplets 4 stempelareal i forhold til det andre stemplets 6 stempelareal. In fig. 1, both cylinder chambers 14, 18 are filled with liquid and the pump stroke is started. While both pistons 4, 6 are displaced as shown in fig. 2, the first liquid and the second liquid are dosed in this part of the pump stroke in a ratio given by the piston area of the first piston 4 in relation to the piston area of the second piston 6.

Når det andre stemplet 6 kommer til anslag mot brystningen 20, slik det er vist i fig. 3, stanser den andre væskes væskestrøm fra det andre sylinderkammeret 18, mens den første væskes væskestrøm fortsetter fra det første sylinderkammeret 14 så lenge det første stemplet 4 forskyves i pumperetningen. Den første fjæra 22 komprimeres samtidig. When the second piston 6 comes to rest against the parapet 20, as shown in fig. 3, the second liquid's liquid flow from the second cylinder chamber 18 stops, while the first liquid's liquid flow continues from the first cylinder chamber 14 as long as the first piston 4 is displaced in the pumping direction. The first spring 22 is simultaneously compressed.

Det endelige blandingsforholdet mellom den første væsken og den andre væsken bestemmes av forholdet mellom det første pumpevolumet og det andre pumpevolumet. The final mixing ratio between the first fluid and the second fluid is determined by the ratio of the first pump volume to the second pump volume.

Under sugeslaget er det andre stemplet 6 stasjonært inntil den første fjæra 22 oppviser mindre kraft enn den andre fjæra 26, typisk når den første fjæra 22 har nådd sin utgangslengde. Deretter forskyver den andre fjæra 26 det andre stemplet 6 under sugeslaget. During the suction stroke, the second piston 6 is stationary until the first spring 22 exhibits less force than the second spring 26, typically when the first spring 22 has reached its output length. Then the second spring 26 displaces the second piston 6 during the suction stroke.

Ulike innstillinger for pumpeslaget vil kunne gi et betydelig reguleringsområde for blandingsforholdet. Ved å stanse det første stemplets 4 pumpeslag når det andre stemplet 6 kommer til anslag mot brystningen 20, kan det hele tiden leveres et kon-stant blandingsforhold mellom den første væsken og den andre væsken. Det kan også tenkes at hele det første stemplets 4 pumpeslag finner sted i et område hvor det andre stemplet 6 har anslag mot brystningen 20. I dette tilfellet doseres bare den første væsken. Different settings for the pump stroke will be able to provide a significant control range for the mixture ratio. By stopping the pumping stroke of the first piston 4 when the second piston 6 comes to rest against the parapet 20, a constant mixing ratio between the first liquid and the second liquid can be delivered at all times. It is also conceivable that the entire pumping stroke of the first piston 4 takes place in an area where the second piston 6 abuts against the parapet 20. In this case, only the first liquid is dosed.

I en alternativ utførelsesform er det første stemplet forsynt med en stopper 42 som er innrettet til å kunne begrense det andre stemplets 6 vandring på det første stemplet 4. Stopperen 42 er indikert stiplet i fig. 1. Den andre fjæra 26 er her overflødig idet stopperen 42 kommer til anslag mot og forskyver det andre stemplet 6 i sitt sugeslag. In an alternative embodiment, the first piston is provided with a stopper 42 which is designed to be able to limit the travel of the second piston 6 on the first piston 4. The stopper 42 is indicated dashed in fig. 1. The second spring 26 is redundant here as the stopper 42 comes to rest against and displaces the second piston 6 in its suction stroke.

I en ytterligere alternativ utførelsesform, se fig. 5, er doseringspumpen 1 tilpasset drift fra en drivanordning 30 med fast slaglengde, for eksempel en motor med ikke vist veivaksling og veivstang. In a further alternative embodiment, see fig. 5, the dosing pump 1 is adapted to operation from a drive device 30 with a fixed stroke, for example an engine with crankshaft and crankshaft not shown.

En del av flensen 24 rager i denne utførelsesformen ut gjennom aksielle spalter 44 i pumpehuset 26. Utvendig er pumpehuset 26 forsynt med en aksialjusterbar slagbe-grensningsring 46 som flensen 24 er innrettet til å komme til anslag mot. In this embodiment, part of the flange 24 protrudes through axial slots 44 in the pump housing 26. Externally, the pump housing 26 is provided with an axially adjustable stroke limitation ring 46 against which the flange 24 is arranged to abut.

Drivanordningen 30 er utformet med en fjærstøtte 48 som er koplet til det første stemplet 4 via ei tredje fjær 50. The drive device 30 is designed with a spring support 48 which is connected to the first piston 4 via a third spring 50.

En returhake 52 på drivanordningen 30 er innrettet til å kunne forskyve det første stemplet 4 i sugeslaget når drivanordningen gjennomfører sitt returslag. Doseringspumpen 1 ifølge denne utførelsesformen, arbeider på samme måte som be-skrevet overfor, men med den ulikhet at når flensen 24 kommer til anslag mot slag-begrensingsringen 46, stanses pumpeslaget selv om ikke drivanordningen 30 har ut-ført hele sin slaglengde. Fjærstøtten 48 komprimerer derved den tredje fjæra 50 under drivanordningens 30 resterende pumpeslag. A return hook 52 on the drive device 30 is arranged to be able to displace the first piston 4 in the suction stroke when the drive device carries out its return stroke. The dosing pump 1 according to this embodiment works in the same way as described above, but with the difference that when the flange 24 comes into contact with the stroke limiting ring 46, the pump stroke is stopped even if the drive device 30 has not completed its entire stroke length. The spring support 48 thereby compresses the third spring 50 during the drive device 30's remaining pump stroke.

Når drivanordningens 30 returslag starter, forlenges den tredje fjæra 52, den første fjæra 22 og den andre fjæra 26 og i denne rekkefølge, hvoretter en eventuell resterende del av sugeslaget bevirkes ved at returhaken 52 trekker det første stemplet 4 med seg. When the drive device 30's return stroke starts, the third spring 52, the first spring 22 and the second spring 26 are extended in this order, after which any remaining part of the suction stroke is effected by the return hook 52 pulling the first piston 4 with it.

Claims (9)

1. Anordning ved en doseringspumpe (1) omfattende i det minste et første stempel (4) og et andre stempel (6) som er forskyvbare i en første sylinderboring (10) respektive i en andre sylinderboring (12), og hvor de minst to stemplene (4, 6) har en felles drivanordning (30),karakterisert vedat det andre stemplet (6) er forskyvbart koplet til og forskyves med det første stemplet (4) i en andel av det første stemplets (4) slaglengde.1. Device for a dosing pump (1) comprising at least a first piston (4) and a second piston (6) which are displaceable in a first cylinder bore (10) and in a second cylinder bore (12), respectively, and where the at least two the pistons (4, 6) have a common drive device (30), characterized in that the second piston (6) is displaceably connected to and is displaced with the first piston (4) in a proportion of the stroke length of the first piston (4). 2. Anordning i henhold til krav 1,karakterisert vedat det andre stemplet (6) forskyves i en pumperetning av ei første fjær (22) som er koplet til det første stemplet (4).2. Device according to claim 1, characterized in that the second piston (6) is displaced in a pumping direction by a first spring (22) which is connected to the first piston (4). 3. Anordning i henhold til krav 1,karakterisert vedat det andre stemplet (6) forskyves i en sugeretning av ei andre fjær (26).3. Device according to claim 1, characterized in that the second piston (6) is displaced in a suction direction by a second spring (26). 4. Anordning i henhold til krav 2 og 3,karakterisert vedat den første fjæra (22) er dimensjonert til å kunne utøve en større kraft enn den andre fjæra (6).4. Device according to claims 2 and 3, characterized in that the first spring (22) is dimensioned to be able to exert a greater force than the second spring (6). 5. Anordning i henhold til krav 2,karakterisert vedat den førs-te fjæras (22) frie lengde begrenser det andre stemplets (6) slaglengde.5. Device according to claim 2, characterized in that the free length of the first spring shaft (22) limits the stroke length of the second piston (6). 6. Anordning i henhold til krav 1,karakterisert vedat det andre stemplets (6) slaglengde er begrenset av en stopper (42) på det første stemplet (4).6. Device according to claim 1, characterized in that the stroke length of the second piston (6) is limited by a stopper (42) on the first piston (4). 7. Anordning i henhold til krav 1,karakterisert vedat det førs-te stemplets (4) slaglengde er justerbar.7. Device according to claim 1, characterized in that the stroke length of the first piston (4) is adjustable. 8. Anordning i henhold til krav 1,karakterisert vedat det andre stemplets (6) slaglengde er justerbar.8. Device according to claim 1, characterized in that the stroke length of the second piston (6) is adjustable. 9. Anordning i henhold til krav 1,karakterisert vedat det førs-te stemplet (4) og det andre stemplet (6) har en felles lengdeakse (8).9. Device according to claim 1, characterized in that the first piston (4) and the second piston (6) have a common longitudinal axis (8).
NO20130896A 2013-06-28 2013-06-28 Dosing pump device NO335905B1 (en)

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NO20130896A NO335905B1 (en) 2013-06-28 2013-06-28 Dosing pump device
US14/899,373 US20160146198A1 (en) 2013-06-28 2014-06-23 Metering Pump
PCT/NO2014/050109 WO2014209128A1 (en) 2013-06-28 2014-06-23 Metering pump
EP14817559.9A EP3014120A4 (en) 2013-06-28 2014-06-23 Metering pump

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DK179219B1 (en) * 2016-05-26 2018-02-12 Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland Fuel or lubrication pump for a large two-stroke compression-ignited internal combustion engine

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US4076465A (en) * 1974-01-18 1978-02-28 Pauliukonis Richard S Volumetric proportioning diluter
US4349130A (en) * 1980-03-03 1982-09-14 Woolfolk Chemical Works, Inc. Liquid metering pump
US4463706A (en) * 1982-05-19 1984-08-07 J.B.M. Associates Method and system for monitoring the dispensing of drugs or nutrients to animals
JPS5999061A (en) * 1982-11-26 1984-06-07 Diesel Kiki Co Ltd Injection pressure controller in pressure accumulating type fuel injection device
FI74450C (en) * 1985-11-27 1988-02-08 Leo Moilanen DOSERINGSPUMP.
US20070286745A1 (en) * 2006-06-09 2007-12-13 Maynard Chance Integrated mixing pump
US8240513B2 (en) * 2008-03-24 2012-08-14 Fluid Management Operations Llc Fluid dispenser with nested displacement members

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US20160146198A1 (en) 2016-05-26
WO2014209128A1 (en) 2014-12-31
EP3014120A4 (en) 2017-03-15
NO335905B1 (en) 2015-03-23

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