EP1800007B1 - Pompe a pression de sortie selectionnable - Google Patents

Pompe a pression de sortie selectionnable Download PDF

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Publication number
EP1800007B1
EP1800007B1 EP05787801.9A EP05787801A EP1800007B1 EP 1800007 B1 EP1800007 B1 EP 1800007B1 EP 05787801 A EP05787801 A EP 05787801A EP 1800007 B1 EP1800007 B1 EP 1800007B1
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EP
European Patent Office
Prior art keywords
pump
chamber
slide ring
control
control piston
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
EP05787801.9A
Other languages
German (de)
English (en)
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EP1800007A1 (fr
EP1800007A4 (fr
Inventor
Matthew Williamson
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.)
Magna Powertrain Inc
Magna Powertrain of America Inc
Original Assignee
Magna Powertrain Inc
Magna Powertrain of America Inc
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Filing date
Publication date
Application filed by Magna Powertrain Inc, Magna Powertrain of America Inc filed Critical Magna Powertrain Inc
Priority to EP13005989.2A priority Critical patent/EP2740937A1/fr
Publication of EP1800007A1 publication Critical patent/EP1800007A1/fr
Publication of EP1800007A4 publication Critical patent/EP1800007A4/fr
Application granted granted Critical
Publication of EP1800007B1 publication Critical patent/EP1800007B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C2/3442—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member

Definitions

  • the present invention relates to a variable capacity vane pump. More specifically, the present invention relates to a variable capacity vane pump with the features of claim 1 in which at least two different equilibrium pressures can be selected between.
  • Variable capacity vane pumps are well known, for example from US 2,799,995 and feature a capacity adjusting element, in the form of a ring known as a slide ring, that can be moved to alter the eccentricity of the pump and hence alter the volumetric capacity of the pump. If the pump is supplying a system with a substantially constant hydraulic resistance, such as an automobile engine lubrication system, changing the output volume of the pump is equivalent to changing the pressure produced by the pump.
  • Having the ability to alter the capacity of the pump is important in environments such as automotive lubrication pumps, wherein the pump will be operated over a range of operating speeds.
  • a feedback supply of the working fluid e.g. lubricating oil
  • a control piston acting against the slide ring or directly to a portion of the exterior of the slide ring, to move the slide ring to decrease capacity, typically against a bias from a return spring.
  • control piston configurations when the pressure at the output of the pump increases, such as when the operating speed of the pump increases, the increased pressure is applied to the control piston to overcome the bias of the return spring and move the slide ring to reduce the capacity of the pump, thus reducing the output volume and hence pressure at the output of the pump.
  • the pressure relief valve system often features a simple piston located in a close fitting bore. The position of the piston in the bore determines whether a passage leading from the pump outlet to a low pressure space such as the pump inlet is open or blocked off. A surface on the piston is exposed directly or indirectly to pressurized working fluid from the pump outlet, tending to move the piston in the direction that opens the passageway.
  • the piston is biased in the opposite direction by a spring, such that the balance of forces between the spring and the pressurized fluid acting on the piston determines the equilibrium position of the piston in the bore.
  • the equilibrium pressure is determined by the area of the control piston against which the working fluid acts, the pressure of the working fluid at the output of the pump and the force generated by the return spring.
  • the equilibrium pressure is selected to be a pressure which is acceptable for the expected operating range of the engine and is thus somewhat of a compromise as, for example, the engine may be able to operate acceptably at lower operating speeds with a lower working fluid pressure than is required at higher engine operating speeds.
  • the engine designers will select an equilibrium pressure for the pump which meets the worst case (high operating speed) conditions. Thus, at lower speeds, the pump will be operating at a higher pressure than necessary for those speeds, wasting energy.
  • variable capacity vane pump or a fixed capacity pump which can provide at least two equilibrium pressures in a reasonably compact pump housing.
  • a variable capacity vane pump having a slide ring which is moveable to alter the capacity of the pump, the pump being operable at at least two selected equilibrium pressures, comprising: a pump casing having a pump chamber therein; a vane pump rotor rotatably mounted in the pump chamber; a slide ring enclosing the vane pump rotor within said pump chamber, the slide ring being moveable within the pump chamber to alter the capacity of the pump; a control housing in the pump casing; a control piston having an actuator end and two control surfaces, the control piston being received within the control housing such that the actuator end engages the slide ring and such that each control surface forms a respective chamber within the control housing, each chamber being connected to a respective gallery through which pressurized fluid can be provided to or removed from the respective chamber to move the control piston within the control housing, and a return spring acting between slide ring and the casing to bias the slide ring towards a given position, wherein a supply of press
  • variable capacity vane pump solves the aforementioned problems of the prior art in that the control piston is spring-biased, and when supplied with pressurized fluid, each chamber creates a force which adds to the force created by the other chamber to act against the bias force of the return spring.
  • a fixed capacity pump having a bore in the pump casing with a passageway that connects the pump outlet to a low pressure space; a piston that opens or closes the passageway according to its position in the bore, the piston having two surfaces, such that each surface forms a respective chamber within the bore, each chamber being connected to a respective gallery through which pressurized fluid can be provided to or removed from the respective chamber to move the piston within the bore; and a return spring acting between the piston and the casing to bias the piston against opening the passageway, wherein a supply of pressurized fluid to one or both of the two chambers can be applied or removed to change the equilibrium pressure of the pump.
  • a variable capacity vane pump in accordance with an embodiment of the present invention is indicated generally at 20 in Figures 1 and 2 .
  • pump 20 includes a casing 22 with a front face 24 which is sealed with a pump cover (not shown) and a suitable gasket, to an engine (not shown) for which pump 20 is to supply pressurized working fluid.
  • pump 20 includes a drive shaft 28 which is driven by any suitable means, such as the engine to which the pump is to supply lubricating oil, to operate pump 20.
  • a pump rotor 32 located with a pump chamber 36 is turned with drive shaft 28.
  • a series of slidable pump vanes 40 rotate with rotor 32, the outer end of each vane 40 engaging the inner surface of a slide ring 44 to define a series of working fluid chambers 48, best seen in Figure 3 .
  • the volume of working fluid chambers 48 changes as the chambers rotate around pump chamber 36, with their volume increasing at the low pressure side of pump 20 and decreasing at the high pressure side of pump 20. This change in volume of working fluid chambers 48 generates the pumping action of pump 20.
  • the amount of rotor eccentricity can be changed to vary the rate at which the volume of working fluid chambers 48 changes on the low pressure side of pump 20 and on the high pressure side of pump 20, thus changing the volumetric capacity of the pump.
  • pump 20 includes a dual control surface control piston 52 and a return spring 56 to control slide ring 44.
  • Control piston housing 60 in which control piston 52 and return spring 56 are received.
  • Control piston housing 60 includes an inner central bore 64 through which the actuator end 68 of control piston 52 extends and housing 60 has an inner step such that housing 60 has two different diameters along its length.
  • Control piston 52 includes first and second control surfaces 72 and 76 respectively which engage a respective one of each of the two diameters of housing 60 to form first and second chambers 80 and 84 respectively within housing 60.
  • Each of chambers 80 and 84 is connected to a respective gallery 88 and 92, best seen in Figure 1 , through which pressurized working fluid can be supplied to chambers 80 and 84.
  • control piston 52 includes a center bore in which return spring 56 is received and the assembly of control piston 52 and return spring 56 is maintained in control piston housing 60 by a plug 100, which can be press fit or otherwise installed in housing 60.
  • Return spring 56 acts between plug 100 and control piston 52 to bias actuator end 68 of control piston 52 out of pump chamber 36.
  • connection of actuator end 68 of control piston 52 to slide ring 44 employed in the illustrated embodiment is believed to be particularly advantageous. It is well known that a good connection between control piston 52 and slide ring 44 is required to ensure that backlash between these elements is substantially avoided, otherwise pump 20 can suffer from undesirable "hunting" about its equilibrium pressure point. Further, the connection between slide ring 44 and control piston 52 must be accomplished in a manner which does not require space that is either not available, or is needed for other engine components. However, providing such a good connection can incur significant machining and/or assembly labour costs.
  • slide ring 44 is formed by the known process of sintering and sizing, without requiring machining, and such a process can typically be performed to tolerances no smaller than +/- 0.025mm. As best seen on Figure 5 , slide ring 44 is formed with a slot 104, the height of which can be controlled within the above-mentioned +/-0.025mm tolerance.
  • Control piston 52 is machined in a conventional manner to provide the necessary fit with the interior of housing 60 and actuator end 68 is formed on piston 52 as a disc-shaped button at the end of a narrow stem, as illustrated, which is machined to fit within the height of slot 104 with minimal, if any, backlash.
  • the diameters of the disc shaped button and the narrow stem are, however, intentionally formed to be somewhat smaller than the corresponding widths of slot 104 to accommodate lateral misalignment of control piston 52 and slide ring 44 which, unlike the above-mentioned backlash, can be tolerated and may occur during assembly, etc.
  • control piston 52 allows cost effective manufacturing of this aspect of pump 20 and does away with the typical requirement for pins, circlips or other joining hardware to connect control piston 52 to slide ring 44, thus reducing part cost and assembly cost.
  • pump 20 can operate in a conventional manner to achieve an equilibrium pressure by providing a feedback supply of pressurized working fluid from the output of pump 20 to one of chambers 80 or 84.
  • pressurized working fluid can be provided to chamber 84 via gallery 92 and the force created by the pressure of the supplied working fluid over the relevant area of chamber 84 can overcome the force of return spring 52 to retract actuator 68 outwardly from pump chamber 36 to move slide ring 44 to decrease capacity.
  • the force of return spring 52 can overcome the force created by the pressure of the supplied working fluid over the relevant area of chamber 84 to extend actuator 68 of control piston 52 into pump cavity 36, moving slide ring 44 to increase capacity of pump 20.
  • a second equilibrium pressure can be selected.
  • a solenoid-operated valve controlled by an engine control system can supply pressurized working fluid to chamber 80, via gallery 88, such that the force created by the pressurized working fluid on the relevant area of chamber 80 is added to the force created by the pressurized working fluid in chamber 84, thus moving slide ring 44 further than would otherwise be the case, to establish a new, lower, equilibrium pressure for pump 20.
  • control mechanism can operate to also supply pressurized working fluid to chamber 80, thus moving slide ring 44 to establish a second equilibrium pressure for pump 20, which second equilibrium pressure is lower than the first equilibrium pressure.
  • Pump 120 includes a housing 124 which is sealed with a pump cover (not shown) and a suitable gasket, to an engine (not shown) for which pump 120 is to supply pressurized working fluid.
  • Pump 120 includes an inner rotor 128 and an outer rotor 132 of conventional design.
  • Inner rotor 128 is engaged and rotated by a suitable driving shaft from the engine, causing outer rotor 132 to rotate also.
  • the pumping operation of such rotors is well known and is described in UK patent 596379 .
  • Working fluid is drawn into the chambers formed by the rotor teeth from pump inlet space 148 and expelled at high pressure into pump outlet space 152.
  • pump 120 includes a dual control surface piston 136.
  • piston 136 includes a center bore in which return spring 140 is received and the assembly of piston 136 and return spring 140 is maintained in the piston bore of housing 124 by a plug 144.
  • Return spring 140 acts between plug 144 and piston 136 to bias piston 136 against forces exerted on at least one of surfaces 176 and 180 by pressurized working fluid.
  • a chamber 172 is formed between piston 136 and plug 144 within the piston bore of housing 124.
  • a hole 164 is provided to link chamber 172 with pump inlet space 148 to allow low pressure working fluid to enter and exit chamber 172 as required to accommodate movement of piston 136.
  • Housing 124 includes a passageway 156 which allows working fluid to escape from pump outlet space 152 to pump inlet space 148 when piston 136 moves far enough against the biasing force of spring 140 such that passageway 156 is not blocked by piston 136.
  • a hole 160 is provided to link chamber 168 to an external control system (not shown) which can supply chamber 168 with either pressurized working fluid directly or indirectly from the pump outlet or with low pressure working fluid from the pump inlet or elsewhere in the engine.
  • Pump 120 is thus capable of operating in two modes.
  • first mode chamber 168 is supplied with low pressure working fluid and no force is exerted on surface 180 of piston 136.
  • the pump outlet pressure which acts only against surface 176 of piston 136, must rise to a relatively high value to overcome the return spring force.
  • second mode chamber 168 is supplied with pressurized working fluid, thus exerting a force on surface 180 of piston 136, in addition to the force already acting at surface 176, both forces acting in the same direction against return spring 140.
  • the pressure of the working fluid need only rise to a relatively low value to overcome the return spring force and thus unblock passageway 156, because said pressure acts against a larger total surface area.
  • pump 120 can operate at either of two equilibrium pressures according to the state of the external control system.
  • An advantage of such a pump system is that the external control system can be made to select the low equilibrium pressure when the engine is operating at lower speeds, at which time high pressure is not required for effective lubrication of the engine, thus saving energy. At higher speeds, at which time the engine requires higher pressure for effective lubrication, the control system can be made to select the high equilibrium pressure.
  • a further advantage of such a pump system is that in the event of a failure in the external control system such that pressurized working fluid cannot be supplied to chamber 168, the pump will revert to the higher of the two equilibrium pressures, thus maintaining effective lubrication of the engine at all speeds.
  • chambers 80 and 84 are designed such that the forces created by a supply of pressurized fluid therein add together to act against the force of return spring 56 (or 140), it will be apparent to those of skill in the art that it is a simple matter, if desired, to alter the design of control piston 52 (or 136) and housing 60 (or 124) such that the force generated by pressurized working fluid in one chamber acts against the force generated by pressurized working fluid in the other chamber and against the force of return spring 56 (or140).
  • Such alternatives are also intended to be within the scope of the present invention.
  • the relevant areas of chambers 80 and 84 differ, three different equilibrium pressure points can be selected between. For example, if the relevant area of chamber 84 is larger than the relevant area of chamber 80, then: to select a first equilibrium pressure, pressurized working fluid can be supplied to only chamber 80; to select a second equilibrium pressure, pressurized working fluid can be supplied to only chamber 84; and to select a third equilibrium pressure pressurized working fluid can be provided to both of chambers 80 and 84.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Claims (7)

  1. Pompe à palettes à capacité variable (20) comportant une bague coulissante (44) mobile pour modifier la capacité de la pompe, la pompe pouvant être actionnée au moins à deux pressions d'équilibre sélectionnées, comprenant :
    un corps de pompe (22) contenant une chambre de pompe (36) dans celui-ci ;
    un rotor de pompe à palettes (32) monté de manière rotative dans la chambre de pompe ;
    une bague coulissante (44) entourant le rotor de la pompe à palettes dans ladite chambre de pompe, la bague coulissante étant mobile dans la chambre de pompe pour modifier la capacité de la pompe ;
    un logement de commande (60) dans le corps de pompe ;
    un piston de commande (52) ayant une extrémité d'actionnement (68) et deux surfaces de commande (72, 76), le piston de commande étant reçu dans le logement de commande de sorte que l'extrémité d'actionnement vient en prise avec la bague coulissante et de sorte que chaque surface de commande forme une chambre respective (80, 84) dans le logement de commande, chaque chambre étant reliée à une galerie respective (88, 92) à travers laquelle un fluide sous pression peut être fourni à la chambre respective ou en être retiré pour déplacer le piston de commande dans le logement de commande et un ressort de rappel (56) agissant entre la bague coulissante et le corps pour contraindre la bague coulissante vers une position donnée, dans laquelle la fourniture de fluide sous pression à l'une des deux chambres peut être appliquée ou retirée pour modifier la pression d'équilibre de la pompe,
    caractérisée en ce que le piston de commande (52) est contraint par ressort vers le ressort de rappel (56), et lorsqu'elle reçoit un fluide sous pression, chaque chambre crée une force qui s'ajoute à la force créée par l'autre chambre pour agir à l'encontre de la force de contrainte du ressort de rappel.
  2. Pompe à capacité variable selon la revendication 1, dans laquelle le ressort de rappel est monté avec le logement de commande et agit entre le logement de commande et le piston de commande pour contraindre la bague coulissante.
  3. Pompe à capacité variable selon la revendication 1, dans laquelle un fluide sous pression est fourni à une première chambre (80) des deux chambres lorsque la pompe fonctionne et un fluide sous pression est fourni à une seconde (84) des deux chambres uniquement en réponse à un signal provenant d'un système de commande.
  4. Pompe à capacité variable selon la revendication 1, dans laquelle, pour engager la bague coulissante, l'extrémité d'actionnement du piston de commande se présente sous la forme d'un disque qui est reçu dans une fente (104) de la bague coulissante, la hauteur du disque ayant une tolérance serrée pour s'engager avec la fente pour empêcher qu'un jeu existe entre la bague coulissante et le piston de commande, le diamètre du disque étant inférieur à la largeur de la fente pour ménager une marge de désalignement latéral du piston de commande et de la bague coulissante.
  5. Pompe à capacité variable selon la revendication 1, dans laquelle chaque chambre possède une surface de dimension différente contre laquelle le fluide sous pression peut agir.
  6. Pompe à capacité variable selon la revendication 5, dans laquelle la fourniture de fluide sous pression peut être appliquée à l'une ou l'autre des deux chambres ou aux deux pour effectuer une sélection parmi trois pressions d'équilibre pour la pompe.
  7. Pompe à capacité variable selon la revendication 1, dans laquelle le piston de commande comporte au moins trois surfaces de commande, le piston de commande étant reçu dans le logement de commande de sorte qu'au moins trois chambres sont formées, chaque chambre pouvant être reliée à une galerie respective, dans laquelle la fourniture de fluide sous pression peut être appliquée à une ou plusieurs des chambres ou en être retirée, pour modifier la pression d'équilibre de la pompe.
EP05787801.9A 2004-09-20 2005-09-20 Pompe a pression de sortie selectionnable Expired - Lifetime EP1800007B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13005989.2A EP2740937A1 (fr) 2004-09-20 2005-09-20 Pompe à pression de sortie sélectionnable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61185804P 2004-09-20 2004-09-20
PCT/CA2005/001426 WO2006032132A1 (fr) 2004-09-20 2005-09-20 Pompe a pression de sortie selectionnable

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP13005989.2A Division EP2740937A1 (fr) 2004-09-20 2005-09-20 Pompe à pression de sortie sélectionnable

Publications (3)

Publication Number Publication Date
EP1800007A1 EP1800007A1 (fr) 2007-06-27
EP1800007A4 EP1800007A4 (fr) 2012-08-08
EP1800007B1 true EP1800007B1 (fr) 2013-12-25

Family

ID=36089805

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13005989.2A Withdrawn EP2740937A1 (fr) 2004-09-20 2005-09-20 Pompe à pression de sortie sélectionnable
EP05787801.9A Expired - Lifetime EP1800007B1 (fr) 2004-09-20 2005-09-20 Pompe a pression de sortie selectionnable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13005989.2A Withdrawn EP2740937A1 (fr) 2004-09-20 2005-09-20 Pompe à pression de sortie sélectionnable

Country Status (6)

Country Link
US (1) US20070231161A1 (fr)
EP (2) EP2740937A1 (fr)
KR (1) KR101226388B1 (fr)
CN (1) CN101044322B (fr)
CA (1) CA2581123C (fr)
WO (1) WO2006032132A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112379B2 (fr) 2008-04-25 2022-01-19 Magna Powertrain Inc. Pompe à palettes à déplacement variable doté d'un port de décharge amélioré
NZ590465A (en) 2008-07-10 2013-08-30 Windfuel Mills Pty Ltd Generation and use of high pressure air
JP2012519253A (ja) * 2009-03-05 2012-08-23 エスティティ テクノロジーズ インク．，ア ジョイントベンチャー オブ マグナ パワートレイン インク．アンド エスハーヴェー ゲーエムベーハー 直接制御式線形可変容量ベーンポンプ
EP2253847B1 (fr) * 2009-05-18 2019-07-03 Pierburg Pump Technology GmbH Pompe à paillettes à lubrifiant à capacité variable
US9388804B2 (en) 2011-01-28 2016-07-12 Magna Powertrain Inc. Oil pump with selectable outlet pressure
US8720849B2 (en) * 2011-03-31 2014-05-13 Magna Powertrain Inc. Low gain pressure relief valve for a fluid pump
KR101251387B1 (ko) * 2012-01-09 2013-04-09 정기영 펌프의 토출구 압력 제어장치
WO2014094860A1 (fr) * 2012-12-20 2014-06-26 Pierburg Pump Technology Gmbh Pompe à palettes à lubrifiant
CN104131981B (zh) * 2014-07-17 2016-04-13 华泽遂 V型多向油料输送泵及其使用方法
EP3724452B1 (fr) * 2017-12-13 2021-10-27 Pierburg Pump Technology GmbH Pompe à palettes à cylindrée variable pour lubrifiant

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Also Published As

Publication number Publication date
US20070231161A1 (en) 2007-10-04
KR101226388B1 (ko) 2013-01-24
EP1800007A1 (fr) 2007-06-27
EP2740937A1 (fr) 2014-06-11
EP1800007A4 (fr) 2012-08-08
CN101044322B (zh) 2010-09-01
CA2581123A1 (fr) 2006-03-30
KR20070073792A (ko) 2007-07-10
WO2006032132A1 (fr) 2006-03-30
CN101044322A (zh) 2007-09-26
CA2581123C (fr) 2015-07-07

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