EP3969754B1 - Fluid circulation pump - Google Patents

Fluid circulation pump Download PDF

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Publication number
EP3969754B1
EP3969754B1 EP20724178.7A EP20724178A EP3969754B1 EP 3969754 B1 EP3969754 B1 EP 3969754B1 EP 20724178 A EP20724178 A EP 20724178A EP 3969754 B1 EP3969754 B1 EP 3969754B1
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EP
European Patent Office
Prior art keywords
lip
upstream
chamber
fluid
lips
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EP20724178.7A
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German (de)
French (fr)
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EP3969754A1 (en
EP3969754C0 (en
Inventor
Guy Delaisse
Erik GUILLEMIN
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AMS R&D Sas
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AMS R&D Sas
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Publication of EP3969754C0 publication Critical patent/EP3969754C0/en
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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
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/08Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/09Pumps having electric drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/08Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/084Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular member being deformed by stretching or distortion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/20Other positive-displacement pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009Special features
    • F04B43/0054Special features particularities of the flexible members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/02Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/028Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms with in- or outlet valve arranged in the plate-like flexible member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • F04B53/1037Flap valves
    • F04B53/1047Flap valves the valve being formed by one or more flexible elements

Definitions

  • the present invention relates to the field of fluid circulation pumps.
  • Pumps are known equipped with a circulation chamber of variable volume depending on the movement of a moving part in the chamber and equipped with a non-return valve upstream of the chamber and a non-return valve downstream of the chamber. bedroom.
  • this chamber When the volume of the chamber increases, this chamber is then in depression, the upstream valve opens and the downstream valve closes, the fluid then being sucked towards the chamber.
  • valves are wearing parts which induce a pressure loss.
  • WO 97/29282 A1 we know a pump with a moving part, comprising two circular lips which function as non-return valves, being in contact with a wall of the chamber.
  • An object of the present invention is to provide a fluid circulation pump having fluid circulation and minimizing pressure loss.
  • a fluid circulation pump comprising a suction inlet, a discharge outlet and a chamber fluidly connected to the suction inlet and to the discharge outlet, a moving part arranged in the chamber and at least one motor mechanically connected to this moving part to move it in the chamber.
  • first and second parts of the movement of said movable part relative to the chamber are distinct from each other, that is to say that the positions respectively adopted by the movable part on the first part of the movement are all different from the positions respectively adopted by the moving part on the second part of the movement.
  • the first upstream circular lip allows a passage of free fluid between said first space and said suction inlet, it induces a limited pressure loss during operation. fluid admission to the chamber.
  • the pump according to the invention can operate without such a valve at the inlet.
  • the efficiency of the pump is thus improved during its fluid admission phase to the chamber.
  • the pump according to the invention is thus particularly effective for transferring a fluid which can be a gas or a liquid.
  • the pump 100 comprises a suction inlet 41 and a discharge outlet 42.
  • This pump includes a motor 46 located either outside the chamber 44 as on the figure 1a , either inside the room as on the figures 2 to 4 .
  • this motor 46 is mechanically connected to the moving part to be able to move it in the chamber 44.
  • the pump 100 also includes a first upstream lip 120a placed closer to the suction inlet 41 than to the discharge outlet 42 and a first downstream lip 121a placed closer to the discharge outlet 42 than to the discharge outlet 42. suction inlet 41.
  • first upstream and downstream lips 120a, 121a are placed between one of the sides of said movable part 45 and a first wall 44a of the chamber 44 to define a first space 123a between these first upstream and downstream lips 120a, 121a.
  • the arrangement of the lips which define the first passage 123a gives the pump a dry self-priming capacity.
  • dry self-priming pump indicates that the pump can draw in dry air and create sufficient vacuum to draw in liquid and move it to the chamber for delivery via a discharge outlet 42 of the pump.
  • first upstream and downstream lips 120a, 121a are preferably circular, the moving part 45 then being either discoidal, as on the figure 1a , 1b , 5, 6 , 7, 8 , or tubular (as on the figures 2, 3 , 4 ).
  • first upstream and downstream lips 120a, 121a can be rectilinear as on the Figure 9 , the moving part 45 then being in the form of a ribbon (as on the Figure 9 ), the part 45 being able to be rigid or elastically deformable depending on the length of the ribbon.
  • the pump 100 is connected to a control unit UC of the pump 100 adapted to control the electrical power supply of the motor 46 of the pump 100.
  • control unit UC is arranged to regulate the operation of the motor 46 as a function of at least one value previously estimated by the control unit.
  • This at least one value previously estimated by the control unit UC can be a value estimated by at least one sensor/probe 50.
  • This at least one previously estimated value may be a pressure value of fluid circulated by the pump, a flow rate value of fluid circulated by the pump, a value of movement speed of the motor, a value of movement frequency of the motor, a value representative of an amplitude of movement of the moving part 5, a value representative of a position of the moving part 5.
  • the motor 46 here an electric motor
  • the control unit UC are supplied with energy via an electrical power cable 60.
  • This control unit UC can itself be connected to a probe 50 adapted to detect the reaching of a liquid level relative to the pump 100.
  • the control unit UC is arranged to control the electrical power supply to the motor in response to the detection of said liquid level by the probe 50.
  • This probe 50 can be fixed on the pump or alternatively it can be fixed on an element other than the pump.
  • the probe 50 can be adjustable so as to adjust a detection level from which the probe detects the presence of liquid on a floor where the pump is placed.
  • the probe 50 may comprise at least two electrodes 51 spaced from one another to be able to detect the reaching of a liquid level based on a measurement of at least one electrical characteristic carried out with these electrodes. This electrical characteristic must be variable depending on the nature of the fluid located between these electrodes.
  • this electrical characteristic measured using these electrodes can be an electrical resistance between these electrodes, a current intensity between these electrodes, an electrical voltage between these electrodes.
  • the control unit UC can, based on this measurement, control the activation of the electric motor 46.
  • a time delay can also be used to authorize operation of the pump after the probe has detected an absence of fluid. This makes it possible to avoid repeated alternations of stopping and starting the pump. The longevity of the pump is thus improved.
  • the electric motor 46 is connected to the moving part 45 by a coupling mechanism 52 in such a way that the actuation of the electric motor 46 by the control unit UC induces an alternating movement of the moving part 45 relative to the chamber for moving a fluid (gas or liquid) from the suction inlet 41 to the discharge outlet 42.
  • the moving part 45 has the shape of a disc hollowed out in its center and connected to the electric motor so as to be moved in an alternating rectilinear movement in a direction perpendicular to a plane in which the disc extends.
  • the first space 123a defined between the lips 120a and 121a forms an annular space extending between a first wall 44a of the chamber 44 and a first side of the movable part 45 which is opposite this first wall 44a.
  • the recess in the disc in its center allows for a pumping effect on both sides of the moving part with a single discharge outlet facing this recess.
  • This moving part 45 is here rigid but it could be deformable so that the actuation of the electric motor 46 induces a propagating wave radially on the moving part 45 to move the fluid.
  • this moving part 45 may include an elastically deformable membrane to allow the propagation of a wave supported by the membrane, this membrane being called an undulating membrane.
  • the membrane can be discoidal (the wave propagating along the radius of this disc) or ribbon-shaped (the wave propagating along the length of the ribbon) or, as illustrated in figures 2 to 4 , in the shape of an elongated flexible tube extensible along its periphery (in this case the wave is a circular wave formed along the periphery of the tube and propagating along the length of this tube).
  • the part 45 is moved by the motor 46 and is alternately moved away from and brought closer to the first wall 44a.
  • the upstream circular lip 120a is always spaced from the first wall 44a which allows a free passage between the first space 123a and the inlet of suction 41.
  • the upstream circular lip 120a allows a free passage of fluid between the suction inlet 41 and the space 123a, regardless of the difference in fluid pressure between space 123a and suction inlet 41.
  • the space 123a is alternately in depression and open towards the suction inlet 41 to suck in fluid (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid.
  • the reciprocating movement of the moving part 45 induces a suction of fluid from the suction inlet 41 towards the first space 123a on the first part P1 of the movement then an expulsion of fluid from the first space 123a towards the discharge outlet 42 on the second part P2 of said reciprocating movement.
  • the part 45 is movable between the first and second walls 44a, 44b of the chamber 44.
  • the part 45 is alternately moved away from and brought closer to the second wall 44b.
  • These second upstream and downstream lips 120b, 121b are preferably circular, the moving part 45 then being either discoidal, as on the figure 1a , 1b , 5, 6 , 7, 8 , or tubular (as on the figures 2, 3 , 4 ).
  • these second upstream and downstream lips 120b, 121b can be rectilinear as on the Figure 9 , the moving part 45 then being in the form of a ribbon (as on the Figure 9 ), the part 45 being able to be rigid or elastically deformable depending on the length of the ribbon.
  • the second upstream lip 120b is placed closer to the suction inlet 41 than to the discharge outlet 42 and the second downstream lip 121b is placed closer to the discharge outlet 42 than to the inlet d aspiration 41.
  • These second upstream and downstream lips 120b, 121b are placed between one of the sides of said movable part 45 and a second wall 44b of the chamber 44 to define a second space 123b between these second upstream and downstream lips 120b, 121b.
  • the second upstream lip 120b is adapted so that on a third part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second upstream lip 120b allows a passage of free fluid between said second space 123b and said suction inlet 41.
  • this second upstream lip 120b is dimensioned so that over the entire third part of said reciprocating movement of said movable part 45 relative to the chamber 44, this second upstream lip 120b is spaced from the second wall 44b.
  • this third part of the movement corresponds to said second part of the movement.
  • this fourth part of the movement corresponds to said first part of the movement of the part 45.
  • the second space 123b is alternately in depression and open towards the suction inlet 41 to suck in fluid (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid.
  • this second space 123b forms an annular space extending between the second wall 44b and the second side of the movable part 45 which is opposite this second wall 44b.
  • the seconds upstream and downstream lips are circular 120a, 121b.
  • these second upstream and downstream lips 120b, 121b are such that, on the third part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second downstream lip 121b provides a seal preventing the passage of fluid from said outlet of discharge 42 towards said second space 123b, the second upstream lip 120b then authorizing a passage of free fluid between said second space 123b and said suction inlet 41.
  • the second upstream lip 120b is moved away from one of said second wall 44b or movable part 45 to generate a free fluid passage, that is to say a free space between said second space 123b and said suction inlet 41.
  • the reciprocating movement of the moving part 45 induces a suction of fluid from the suction inlet 41 towards the second space 123a then an expulsion of fluid from the second space 123b towards the discharge outlet 42.
  • one face of the moving part does not have a lip opposite then, it is either because this face is not used for pumping (case of a moving part in the shape of a disc not hollowed out in its center), or because it is the moving part 45 which is deformable to establish a seal against the corresponding wall of the chamber.
  • a given lip can press against a support of this lip (the chamber wall or the moving part) and act as a suction cup.
  • Each at least one fluid passage 48, 49 between a given lip and its support 124 is such that when this lip comes to rest against its support, fluid can continue to circulate between this lip and its support. This avoids the suction effect.
  • each boss 48 or channel 49 extends longitudinally from one end of the given lip towards a junction point between this lip and its support.
  • bosses and/or channels are only formed/carried on the support 124 of the lip rather than on the lip itself because this lip is then deformable in a homogeneous manner.
  • these bosses or channels are formed on the support of the lip to form rays centered around an axis of symmetry of the given lip.
  • said at least one fluid passage 48, 49 formed between the given lip and its support 124 extends radially with respect to a central axis of symmetry X-X of this at least one given lip.
  • each of said lips when observed in a section plane passing through a central axis of symmetry (XX) common to these said lips, comprises a proper section extending over a major part of the length of this given lip, this proper section of this lip having a constant thickness E in this cutting plane.
  • the clean section of constant thickness E of a given lip extends over a major part of the length of this given lip seen in said cutting plane passing through the axis of symmetry XX of this lip.
  • the thickness of a clean section of a given lip is considered constant when the minimum lip thickness measured in this clean section is greater than 70% of the maximum lip thickness measured in this clean section.
  • the constant natural thicknesses E of the upstream lips 120a, 120b are preferably identical to each other.
  • the constant natural thicknesses E of the downstream lips 121a, 121b are preferably identical to each other.
  • the constant natural thicknesses E of the upstream lips 120a, 120b are preferentially greater than the constant natural thicknesses E of the downstream lips 121a, 121b.
  • the length of a given lip is the distance measured between a point of attachment of this given lip to its support 124 and an end point of this given lip, these attachment and end points being observed in the plane section passing through the central axis of symmetry X-X.
  • each of the lips has a beveled end when observed in said cutting plane, the bevel constituting a sealing surface intended to alternately come to bear to provide a seal or to be separated to allow fluid to pass.
  • the beveled end increases the sealing surface of the lip and improves its resistance (even if the beveled part has a damaged area, it remains capable of achieving selective sealing all around this damaged area).
  • said first upstream circular lip 120a has an interior surface conical oriented towards a central axis of symmetry XX of this first upstream circular lip 120a, this conical interior surface extending between a circular base of this first upstream circular lip 120a and a circular end of this first upstream circular lip 120a.
  • the conical interior surface of a given lip which extends between a circular base of this given lip and a circular end of this given lip allows to minimize the interior surface of this lip which is exposed to the fluid under pressure.
  • said second upstream circular lip 120b also has a conical interior surface oriented towards a central axis of symmetry X-X of this second upstream circular lip 120b.
  • This conical interior surface of this second upstream circular lip 120b extends between a circular base of this second upstream circular lip 120b and a circular end of this second upstream circular lip 120b.
  • each downstream circular lip 121a, 121b has a conical interior surface oriented towards a central axis of symmetry X-X of this downstream circular lip 121a, 121b.
  • This conical interior surface of the downstream circular lip 121a, 121b extends between a circular base of this downstream circular lip 121a, 121b and a circular end of this downstream circular lip 121a, 121b.
  • each conical interior surface of one of the given circular lips 120a, 121a, 120b, 121b has a cone angle less than or equal to 40° relative to a plane in which the circular base of this given circular lip extends.
  • Having a cone angle less than or equal to 40° allows, when moving the moving part 45 relative to the chamber wall, to maximize radial deformation of the lip while minimizing its axial deformation along the length of the lip.
  • the X-X axis This minimizes the force of the lip opposing the movement of the moving part and reduces the wear of the lip.
  • each of said lips 120a, 120b, 121a, 121b is made of a material having a Young's modulus of between 1MPa and 220MPa.
  • the lip presents a compromise allowing the bending necessary for the movement of the moving part 45 while limiting its radial deformation under the effect of the fluid pressure.
  • the first upstream and downstream circular lips 120a, 121a are carried by a base common to these lips assembled removably on the first wall 44a of the chamber 44.
  • first upstream and downstream circular lips 120b, 121b are carried by a base common to these lips assembled removably on the second wall 44b of the chamber 44.
  • the lips can be replaced together by dismantling the bases which support them.
  • the first upstream and downstream circular lips 120a, 121a can be carried by said moving part 45.
  • a base common to these lips can be assembled removably on the moving part 45.
  • This embodiment allows the replacement of lips 120a and 121a independently of the moving part 45.
  • the reciprocating movement of the moving part 45 can be an axial movement along a central axis of symmetry X-X of the moving part 45 which is a form of revolution.
  • the reciprocating movement of the moving part (45) can be a radial movement around a central axis of symmetry XX of the moving part 45 which is of tubular shape.
  • the motor 46 can be found inside the chamber as on the figures 2, 3 , 4 or be outside the room, as on the figures 1a , 5 and 6 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Description

La présente invention se rapporte au domaine des pompes de circulation de fluide.The present invention relates to the field of fluid circulation pumps.

ARRIERE PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION

Il est connu des pompes équipées d'une chambre de circulation de volume variable en fonction du déplacement d'une pièce mobile dans la chambre et équipée d'un clapet anti retour en amont de la chambre et d'un clapet anti retour en aval de la chambre.Pumps are known equipped with a circulation chamber of variable volume depending on the movement of a moving part in the chamber and equipped with a non-return valve upstream of the chamber and a non-return valve downstream of the chamber. bedroom.

Lorsque le volume de la chambre augmente, cette chambre se trouve alors en dépression, le clapet en amont s'ouvre et le clapet en aval se ferme, le fluide étant alors aspiré vers la chambre.When the volume of the chamber increases, this chamber is then in depression, the upstream valve opens and the downstream valve closes, the fluid then being sucked towards the chamber.

Lorsque le volume de la chambre diminue, cette chambre se trouve alors en surpression, le clapet en amont se ferme et le clapet en aval s'ouvre, le fluide est alors refoule de la chambre vers une sortie de refoulement.When the volume of the chamber decreases, this chamber is then under overpressure, the upstream valve closes and the downstream valve opens, the fluid is then discharged from the chamber towards a discharge outlet.

De tels clapets sont des pièces d'usure qui induisent une perte de charge. De WO 97/29282 A1 on connaît une pompe avec une pièce mobile, comportant deux lèvres circulaires qui fonctionnent comme clapets anti-retour, étant en contact avec une paroi de la chambre.Such valves are wearing parts which induce a pressure loss. Of WO 97/29282 A1 we know a pump with a moving part, comprising two circular lips which function as non-return valves, being in contact with a wall of the chamber.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Un objet de la présente invention est de fournir une pompe de circulation de fluide présentant une mise en circulation de fluide et minimisant la perte de charge.An object of the present invention is to provide a fluid circulation pump having fluid circulation and minimizing pressure loss.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention est définie par les revendications.The invention is defined by the claims.

A cet effet, il est proposé selon l'invention une pompe de circulation de fluide comportant une entrée d'aspiration, une sortie de refoulement et une chambre reliée fluidiquement à l'entrée d'aspiration et à la sortie de refoulement, une pièce mobile disposée dans la chambre et au moins un moteur reliée mécaniquement à cette pièce mobile pour la déplacer dans la chambre.For this purpose, according to the invention, a fluid circulation pump is proposed comprising a suction inlet, a discharge outlet and a chamber fluidly connected to the suction inlet and to the discharge outlet, a moving part arranged in the chamber and at least one motor mechanically connected to this moving part to move it in the chamber.

La pompe selon l'invention est essentiellement caractérisée en ce qu'elle comporte une première lèvre circulaire amont placée à plus grande proximité de l'entrée d'aspiration que de la sortie de refoulement et une première lèvre circulaire aval placée à plus grande proximité de la sortie de refoulement que de l'entrée d'aspiration, ces premières lèvres circulaires amont et aval étant placées entre un des côtés ladite pièce mobile et une première paroi de la chambre pour définir un premier espace entre ces premières lèvres circulaires amont et aval, ces premières lèvres circulaires amont et aval étant telles que :

  • sur une première partie dudit déplacement de ladite pièce mobile par rapport à la chambre, la première lèvre circulaire aval réalise une étanchéité interdisant le passage de fluide de ladite sortie de refoulement vers ledit premier espace, la première lèvre circulaire amont autorisant alors un passage de fluide libre entre ledit premier espace et ladite l'entrée d'aspiration ; et que
  • sur une deuxième partie dudit déplacement alternatif de ladite pièce mobile par rapport à la chambre, distincte de la première partie du déplacement, la première lèvre circulaire amont réalise une étanchéité interdisant le passage de fluide dudit premier espace vers ladite l'entrée d'aspiration, la première lèvre circulaire aval étant agencée pour que tout au long dudit déplacement de ladite pièce mobile par rapport à la chambre :
  • elle autorise le passage de fluide du premier espace vers ladite sortie de refoulement ; et
  • elle interdise le passage de fluide de ladite sortie de refoulement vers ledit premier espace.
The pump according to the invention is essentially characterized in that it comprises a first circular upstream lip placed closer to the suction inlet than to the discharge outlet and a first downstream circular lip placed closer to the delivery outlet than to the suction inlet, these first upstream and downstream circular lips being placed between one of the sides of said movable part and a first wall of the chamber to define a first space between these first upstream and downstream circular lips, these first upstream and downstream circular lips being such that:
  • on a first part of said movement of said movable part relative to the chamber, the first downstream circular lip provides a seal preventing the passage of fluid from said discharge outlet to said first space, the first upstream circular lip then authorizing a passage of fluid free between said first space and said suction inlet; and
  • on a second part of said reciprocating movement of said movable part relative to the chamber, distinct from the first part of the movement, the first upstream circular lip provides a seal preventing the passage of fluid from said first space towards said suction inlet, the first downstream circular lip being arranged so that throughout said movement of said movable part relative to the chamber:
  • it allows the passage of fluid from the first space towards said discharge outlet; And
  • it prohibits the passage of fluid from said discharge outlet to said first space.

Pour la compréhension de l'invention les première et deuxième parties du déplacement de ladite pièce mobile par rapport à la chambre sont distinctes l'une de l'autre, c'est-à-dire que les positions respectivement adoptées par la pièce mobile sur la première partie du déplacement sont toutes différentes des positions respectivement adoptées par la pièce mobile sur la deuxième partie du déplacement.For the understanding of the invention the first and second parts of the movement of said movable part relative to the chamber are distinct from each other, that is to say that the positions respectively adopted by the movable part on the first part of the movement are all different from the positions respectively adopted by the moving part on the second part of the movement.

Grâce à cet agencement de la pompe selon l'invention, la pièce mobile fait varier le volume du premier espace de telle manière que ce premier espace est :

  • soit mis en dépression et ouvert vers l'entrée d'aspiration de fluide pour aspirer du fluide vers cet espace (la sortie de refoulement étant alors obturée par la première lèvre aval) ;
  • soit mis en compression et ouvert vers la seule sortie de refoulement pour refouler du fluide du premier espace vers la sortie de refoulement (l'entrée d'aspiration étant alors obturée par la première lèvre amont).
Thanks to this arrangement of the pump according to the invention, the moving part varies the volume of the first space in such a way that this first space is:
  • either placed under depression and opened towards the fluid suction inlet to suck fluid towards this space (the discharge outlet then being closed by the first downstream lip);
  • is placed in compression and opened towards the discharge outlet only to discharge fluid from the first space towards the discharge outlet (the suction inlet then being closed by the first upstream lip).

Comme sur la première partie dudit déplacement de ladite pièce mobile par rapport à la chambre, la première lèvre circulaire amont autorise un passage de fluide libre entre ledit premier espace et ladite l'entrée d'aspiration elle induit une perte de charge limitée lors de l'admission de fluide vers la chambre.As on the first part of said movement of said movable part relative to the chamber, the first upstream circular lip allows a passage of free fluid between said first space and said suction inlet, it induces a limited pressure loss during operation. fluid admission to the chamber.

Ainsi, contrairement aux pompes de l'art antérieur qui nécessitent un clapet anti retour à l'admission, la pompe selon l'invention peut fonctionner sans un tel clapet à l'admission. Le rendement de la pompe est ainsi amélioré lors de sa phase d'admission de fluide vers la chambre.Thus, unlike pumps of the prior art which require a non-return valve at the inlet, the pump according to the invention can operate without such a valve at the inlet. The efficiency of the pump is thus improved during its fluid admission phase to the chamber.

La pompe selon l'invention est ainsi particulièrement efficace pour transférer un fluide qui peut être un gaz ou un liquide.The pump according to the invention is thus particularly effective for transferring a fluid which can be a gas or a liquid.

En limitant la perte de charge lors de l'admission, la capacité auto amorçante à sec de la pompe est ainsi améliorée.By limiting the pressure loss during intake, the dry self-priming capacity of the pump is thus improved.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels:

  • la figure 1a est une vue en coupe transversale d'une pompe 100 selon l'invention qui comporte un moteur électrique 46 entrainant un déplacement alternatif d'une pièce mobile 45 entre des première et deuxième parois 44a, 44b de la chambre 44 pour générer une aspiration de fluide par la pompe ; Une zone de cette figure 1a est un agrandissement au niveau de cette pièce mobile 45 où l'on voit des premières lèvres circulaires amont et aval 120a, 121a d'un premier côté de la pièce 45 et des deuxièmes lèvres circulaires amont et aval 120b, 121b d'un autre côté de la pièce 45 ;
  • la figure 1b est une vue de détail des lèvres dans un plan de coupe dans lequel s'étend un axe de symétrie X-X des lèvres, on voit que chacune des première lèvres amont et aval présente une épaisseur constante E sur une majeure partie de la longueur de lèvre, chacune de ces lèvres étant biseautée à son extrémité terminale (le biseau augmente la surface de contact de la lèvre et améliore son étanchéité et sa longévité) ;
  • la figure 2 est une vue d'une pompe selon l'invention dans laquelle la pièce mobile 45 est une tubulaire expansible radialement par rapport à un axe de symétrie X-X des lèvres, cette figure 2 étant observée dans un plan de coupe dans lequel s'étend ledit axe de symétrie X-X des lèvres ;
  • la figure 3 est une vue de la pompe selon l'invention illustrée à la figure 2 alors qu'elle est mise en fonctionnement sous l'effet du moteur électrique 46 ;
  • la figure 4 est une vue en coupe d'une pompe similaire à celle de la pompe des figures 2 et 3, mais ici, les lèvres ne sont pas portées par les parois 44a, 44b de la chambre 44 mais elles sont portées par la pièce mobile 45 qui est tubulaire et déformable radialement autour de l'axe de symétrie X-X ;
  • la figure 5 est une vue de détail des lèvres et de la pièce mobile 45 de la pompe selon l'invention conforme à la figure 1a, sur cette vue la pièce mobile 45 est dans une première partie P1 de son déplacement, la pompe étant alors en aspiration avec un passage de fluide libre créé par la lèvre amont 120a ;
  • la figure 6 est une vue de détail conforme à la figure 5 mais ici la pompe est en refoulement un passage de fluide ouvert au niveau de la lèvre aval 121a ;
  • la figure 7 est une vue en coupe de la pièce mobile 45 dans la chambre 44, les premières lèvres 120a, 121a sont ici attachées d'un premier côté de la pièce mobile 45 pour venir en appui contre une première paroi 44a de la chambre 44 et les deuxièmes lèvres 120b, 121b sont attachées d'un second côté de la pièce mobile 45 pour venir en appui contre une seconde paroi 44b de la chambre 44 ;
  • la figure 8 est une vue en coupe de la seconde paroi 44b de la chambre 44 de la pompe, dans ce mode de réalisation, les deuxièmes lèvres 120b, 121b ne sont pas attachées à la pièce mobile 45 comme sur la figure 7, mais elles sont exclusivement attachées à la deuxième paroi 44b de la chambre 44 (ce mode est conforme à celui présenté à la figure 1a où la deuxième paroi 44b porte les deuxièmes lèvres 120b, 121b et où la première paroi 44a porte les premières lèvres 120a, 121a) ;
  • la figure 9 est une vue en perspective d'une partie de la pompe selon l'invention dans un mode où la pièce mobile est en forme de ruban et où les premières lèvres amont et aval 120a, 121a et les secondes lèvres amont et aval 120b, 121b sont rectilignes.
Other characteristics and advantages of the invention will emerge clearly from the description given below, for information only and in no way limiting, with reference to the appended drawings, in which:
  • there figure 1a is a cross-sectional view of a pump 100 according to the invention which comprises an electric motor 46 causing reciprocating movement of a movable part 45 between first and second walls 44a, 44b of the chamber 44 to generate a suction of fluid by the pump; An area of this figure 1a is an enlargement at the level of this moving part 45 where we see first upstream and downstream circular lips 120a, 121a on a first side of the part 45 and second upstream and downstream circular lips 120b, 121b on another side from room 45;
  • there figure 1b is a detailed view of the lips in a section plane in which an axis of symmetry XX of the lips extends, we see that each of the first upstream and downstream lips has a constant thickness E over a major part of the length of the lip, each of these lips being beveled at its terminal end (the bevel increases the contact surface of the lip and improves its sealing and longevity);
  • there figure 2 is a view of a pump according to the invention in which the moving part 45 is a tubular expandable radially relative to an axis of symmetry XX of the lips, this figure 2 being observed in a section plane in which said axis of symmetry XX of the lips extends;
  • there Figure 3 is a view of the pump according to the invention illustrated in figure 2 while it is put into operation under the effect of the electric motor 46;
  • there Figure 4 is a sectional view of a pump similar to that of the pump of figures 2 and 3 , but here, the lips are not carried by the walls 44a, 44b of the chamber 44 but they are carried by the moving part 45 which is tubular and deformable radially around the axis of symmetry XX;
  • there Figure 5 is a detailed view of the lips and the moving part 45 of the pump according to the invention in accordance with the figure 1a , in this view the moving part 45 is in a first part P1 of its movement, the pump then being in suction with a free fluid passage created by the upstream lip 120a;
  • there Figure 6 is a detailed view conforming to the Figure 5 but here the pump is discharging a fluid passage open at the level of the downstream lip 121a;
  • there figure 7 is a sectional view of the moving part 45 in the chamber 44, the first lips 120a, 121a are here attached to a first side of the moving part 45 to come to bear against a first wall 44a of the chamber 44 and the second lips 120b, 121b are attached to a second side of the movable part 45 to come to bear against a second wall 44b of the chamber 44;
  • there figure 8 is a sectional view of the second wall 44b of the chamber 44 of the pump, in this embodiment, the second lips 120b, 121b are not attached to the moving part 45 as in the figure 7 , but they are exclusively attached to the second wall 44b of the chamber 44 (this mode conforms to that presented in figure 1a where the second wall 44b carries the second lips 120b, 121b and where the first wall 44a carries the first lips 120a, 121a);
  • there Figure 9 is a perspective view of a part of the pump according to the invention in a mode where the moving part is in the form of a ribbon and where the first upstream and downstream lips 120a, 121a and the second upstream and downstream lips 120b, 121b are rectilinear.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

Comme indiqué précédemment, la pompe 100 selon l'invention comporte une entrée d'aspiration 41 et une sortie de refoulement 42.As indicated previously, the pump 100 according to the invention comprises a suction inlet 41 and a discharge outlet 42.

Cette pompe comporte un moteur 46 se trouvant soit à l'extérieur de la chambre 44 comme sur la figure 1a, soit à l'intérieur de la chambre comme sur les figures 2 à 4.This pump includes a motor 46 located either outside the chamber 44 as on the figure 1a , either inside the room as on the figures 2 to 4 .

Dans tous les modes, ce moteur 46 est relié mécaniquement à la pièce mobile pour pouvoir la déplacer dans la chambre 44.In all modes, this motor 46 is mechanically connected to the moving part to be able to move it in the chamber 44.

La pompe 100 comporte aussi une première lèvre amont 120a placée à plus grande proximité de l'entrée d'aspiration 41 que de la sortie de refoulement 42 et une première lèvre aval 121a placée à plus grande proximité de la sortie de refoulement 42 que de l'entrée d'aspiration 41.The pump 100 also includes a first upstream lip 120a placed closer to the suction inlet 41 than to the discharge outlet 42 and a first downstream lip 121a placed closer to the discharge outlet 42 than to the discharge outlet 42. suction inlet 41.

Ces premières lèvres amont et aval 120a, 121a sont placées entre un des côtés ladite pièce mobile 45 et une première paroi 44a de la chambre 44 pour définir un premier espace 123a entre ces premières lèvres amont et aval 120a, 121a.These first upstream and downstream lips 120a, 121a are placed between one of the sides of said movable part 45 and a first wall 44a of the chamber 44 to define a first space 123a between these first upstream and downstream lips 120a, 121a.

L'agencement des lèvres qui définissent le premier passage 123a confère à la pompe une capacité auto-amorçante à sec.The arrangement of the lips which define the first passage 123a gives the pump a dry self-priming capacity.

Le terme pompe auto-amorçante à sec indique que la pompe peut aspirer de l'air sec et créer une dépression suffisante pour aspirer du liquide et le déplacer jusqu'à la chambre pour le refouler via une sortie de refoulement 42 de la pompe.The term dry self-priming pump indicates that the pump can draw in dry air and create sufficient vacuum to draw in liquid and move it to the chamber for delivery via a discharge outlet 42 of the pump.

Ces premières lèvres amont et aval 120a, 121a sont préférentiellement circulaires, la pièce mobile 45 étant alors soit discoïdale, comme sur la figure 1a, 1b, 5, 6, 7, 8, soit tubulaire (comme sur les figures 2, 3, 4).These first upstream and downstream lips 120a, 121a are preferably circular, the moving part 45 then being either discoidal, as on the figure 1a , 1b , 5, 6 , 7, 8 , or tubular (as on the figures 2, 3 , 4 ).

Toutefois, ces première lèvres amont et aval 120a, 121a peuvent être rectilignes comme sur la figure 9, la pièce mobile 45 étant alors en forme de ruban (comme sur la figure 9), la pièce 45 pouvant être rigide ou déformable élastiquement suivant la longueur du ruban.However, these first upstream and downstream lips 120a, 121a can be rectilinear as on the Figure 9 , the moving part 45 then being in the form of a ribbon (as on the Figure 9 ), the part 45 being able to be rigid or elastically deformable depending on the length of the ribbon.

Comme on le voit de la figure 1a, la pompe 100 est reliée à une unité de commande UC de la pompe 100 adaptée à commander l'alimentation électrique du moteur 46 de la pompe 100.As we see from the figure 1a , the pump 100 is connected to a control unit UC of the pump 100 adapted to control the electrical power supply of the motor 46 of the pump 100.

Préférentiellement, l'unité de commande UC est agencée pour réguler le fonctionnement du moteur 46 en fonction d'au moins une valeur préalablement estimée par l'unité de commande.Preferably, the control unit UC is arranged to regulate the operation of the motor 46 as a function of at least one value previously estimated by the control unit.

Cette au moins une valeur préalablement estimée par l'unité de commande UC peut être une valeur estimée par au moins un capteur / une sonde 50.This at least one value previously estimated by the control unit UC can be a value estimated by at least one sensor/probe 50.

Cette au moins une valeur préalablement estimée peut être une valeur de pression de fluide mis en circulation par la pompe, une valeur de débit de fluide mis en circulation par la pompe, une valeur de vitesse de déplacement du moteur, une valeur de fréquence de déplacement du moteur, une valeur représentative d'une amplitude de déplacement de la pièce mobile 5, une valeur représentative d'une position de la pièce mobile 5.This at least one previously estimated value may be a pressure value of fluid circulated by the pump, a flow rate value of fluid circulated by the pump, a value of movement speed of the motor, a value of movement frequency of the motor, a value representative of an amplitude of movement of the moving part 5, a value representative of a position of the moving part 5.

Le moteur 46, ici un moteur électrique, et l'unité de commande UC sont alimentés en énergie via un câble d'alimentation électrique 60.The motor 46, here an electric motor, and the control unit UC are supplied with energy via an electrical power cable 60.

Cette unité de commande UC peut elle-même être reliée à une sonde 50 adaptée à détecter l'atteinte d'un niveau de liquide par rapport à la pompe 100. Dans ce cas, l'unité de commande UC est agencée pour commander l'alimentation électrique du moteur en réponse à la détection dudit niveau de liquide par la sonde 50.This control unit UC can itself be connected to a probe 50 adapted to detect the reaching of a liquid level relative to the pump 100. In this case, the control unit UC is arranged to control the electrical power supply to the motor in response to the detection of said liquid level by the probe 50.

Cette sonde 50 peut être fixée sur la pompe ou alternativement elle peut être fixée sur un élément autre que la pompe.This probe 50 can be fixed on the pump or alternatively it can be fixed on an element other than the pump.

La sonde 50 peut être réglable de manière à ajuster un niveau de détection à partir duquel la sonde détecte la présence de liquide sur un sol où est disposée la pompe.The probe 50 can be adjustable so as to adjust a detection level from which the probe detects the presence of liquid on a floor where the pump is placed.

Comme illustré sur la figure 1a, la sonde 50 peut comporter au moins deux électrodes 51 espacées l'une de l'autre pour pouvoir détecter l'atteinte d'un niveau de liquide en fonction d'une mesure d'au moins une caractéristique électrique réalisée avec ces électrodes. Cette caractéristique électrique doit être variable en fonction de la nature du fluide se trouvant entre ces électrodes.As illustrated on the figure 1a , the probe 50 may comprise at least two electrodes 51 spaced from one another to be able to detect the reaching of a liquid level based on a measurement of at least one electrical characteristic carried out with these electrodes. This electrical characteristic must be variable depending on the nature of the fluid located between these electrodes.

Par exemple, cette caractéristique électrique mesurée à l'aide de ces électrodes peut être une résistance électrique entre ces électrodes, une intensité de courant entre ces électrodes, une tension électrique entre ces électrodes.For example, this electrical characteristic measured using these electrodes can be an electrical resistance between these electrodes, a current intensity between these electrodes, an electrical voltage between these electrodes.

Ainsi, dès que le liquide vient en contact avec ces électrodes on a une variation de la caractéristique électrique mesurée et l'on peut ainsi mesurer l'atteinte du niveau de liquide.Thus, as soon as the liquid comes into contact with these electrodes there is a variation in the measured electrical characteristic and we can thus measure the reaching of the liquid level.

L'unité de commande UC peut en fonction de cette mesure commander la mise en fonctionnement du moteur électrique 46.The control unit UC can, based on this measurement, control the activation of the electric motor 46.

On évite ainsi de faire fonctionner le moteur pour des niveaux de liquide trop faibles, la pompe étant actionnée uniquement lorsqu'elle peut commencer à aspirer du liquide sur le sol.This avoids running the motor for liquid levels that are too low, the pump being activated only when it can start to suck liquid from the ground.

Une temporisation peut également être utilisée pour autoriser le fonctionnement de la pompe après que la sonde aura détecté une absence de fluide. Ceci permet d'éviter des alternances répétées d'arrêt et mise en fonctionnement de la pompe. La longévité de la pompe est ainsi améliorée.A time delay can also be used to authorize operation of the pump after the probe has detected an absence of fluid. This makes it possible to avoid repeated alternations of stopping and starting the pump. The longevity of the pump is thus improved.

Comme on le comprend des figures 1a, 2, 3, 4, 5 et 6, le moteur électrique 46 est relié à la pièce mobile 45 par un mécanisme d'attelage 52 de telle manière que l'actionnement du moteur électrique 46 par l'unité de commande UC induise un déplacement alternatif de la pièce mobile 45 par rapport à la chambre pour déplacer un fluide (gaz ou liquide) de l'entrée d'aspiration 41 vers la sortie de refoulement 42.As we understand from figures 1a , 2 , 3 , 4 , 5 and 6 , the electric motor 46 is connected to the moving part 45 by a coupling mechanism 52 in such a way that the actuation of the electric motor 46 by the control unit UC induces an alternating movement of the moving part 45 relative to the chamber for moving a fluid (gas or liquid) from the suction inlet 41 to the discharge outlet 42.

Sur les figures 1a, 1b, 5 et 6, la pièce mobile 45 a la forme d'un disque évidé en son centre et relié au moteur électrique de manière à être déplacé selon un mouvement rectiligne alternatif suivant une direction perpendiculaire à un plan dans lequel s'étend le disque.On the figures 1a , 1b , 5 and 6 , the moving part 45 has the shape of a disc hollowed out in its center and connected to the electric motor so as to be moved in an alternating rectilinear movement in a direction perpendicular to a plane in which the disc extends.

Le premier espace 123a défini entre les lèvres 120a et 121a forme un espace annulaire s'étendant entre une première paroi 44a de la chambre 44 et un premier côté de la pièce mobile 45 qui est en vis-à-vis de cette première paroi 44a.The first space 123a defined between the lips 120a and 121a forms an annular space extending between a first wall 44a of the chamber 44 and a first side of the movable part 45 which is opposite this first wall 44a.

L'évidement du disque en son centre permet d'avoir un effet de pompage des deux côtés de la pièce mobile avec une seule sortie de refoulement face à cet évidement.The recess in the disc in its center allows for a pumping effect on both sides of the moving part with a single discharge outlet facing this recess.

Il est toutefois envisageable que la pièce mobile 45 soit un disque plein (non évidé en son centre) et dans ce cas, cette pièce mobile 45 peut permettre :

  • soit un effet de pompage d'un seul des deux côtés de la pièce mobile (dans ce cas il n'y a besoin que d'une seule sortie de refoulement) ;
  • soit un effet de pompage des deux côtes de la pièce mobile (dans ce cas, on doit prévoir une sortie de refoulement pour chaque côté de la pièce mobile).
It is however possible that the moving part 45 is a solid disc (not hollowed out in its center) and in this case, this moving part 45 can allow:
  • either a pumping effect on only one of the two sides of the moving part (in this case there is only need for a single discharge outlet);
  • or a pumping effect on both sides of the moving part (in this case, a discharge outlet must be provided for each side of the moving part).

Cette pièce mobile 45 est ici rigide mais elle pourrait être déformable de manière que l'actionnement du moteur électrique 46 induise une onde se propageant radialement sur la pièce mobile 45 pour déplacer le fluide.This moving part 45 is here rigid but it could be deformable so that the actuation of the electric motor 46 induces a propagating wave radially on the moving part 45 to move the fluid.

Dans ce cas, cette pièce mobile 45 peut comporter une membrane élastiquement déformable pour permettre la propagation d'une onde supportée par la membrane, cette membrane étant nommée membrane ondulante.In this case, this moving part 45 may include an elastically deformable membrane to allow the propagation of a wave supported by the membrane, this membrane being called an undulating membrane.

Dans des modes particuliers, la membrane peut être discoïdale (l'onde se propageant suivant le rayon de ce disque) ou en forme de ruban (l'onde se propageant suivant la longueur du ruban) ou, comme illustré aux figures 2 à 4, en forme d'un tube souple allongé extensible suivant sa périphérie (dans ce cas l'onde est une onde circulaire formée suivant la périphérie du tube et se propageant suivant la longueur de ce tube).In particular modes, the membrane can be discoidal (the wave propagating along the radius of this disc) or ribbon-shaped (the wave propagating along the length of the ribbon) or, as illustrated in figures 2 to 4 , in the shape of an elongated flexible tube extensible along its periphery (in this case the wave is a circular wave formed along the periphery of the tube and propagating along the length of this tube).

Dans tous les modes de réalisation de la pompe selon l'invention, la première lèvre circulaire (pour la membrane discoïdale ou en forme d'un tube) ou rectiligne (pour la membrane en forme de ruban) amont 120a et la première lèvre circulaire (pour la membrane discoïdale ou en forme d'un tube) ou rectiligne (pour la membrane en forme de ruban) aval 121a sont prévues pour se déformer en fonction du déplacement de la pièce mobile 45 de manière à créer entre ces lèvres 120a, 121a et la paroi 44a de la chambre 44, un premier espace 123a alternativement :

  • expansible lorsque l'on écarte la pièce mobile 45 vis-à-vis de la première paroi 44a de la chambre ; et
  • compressible lorsque l'on rapproche la pièce mobile 45 vis-à-vis de la première paroi 44a.
In all embodiments of the pump according to the invention, the first circular lip (for the discoidal or tube-shaped membrane) or rectilinear lip (for the ribbon-shaped membrane) upstream 120a and the first circular lip ( for the discoidal or tube-shaped membrane) or rectilinear (for the ribbon-shaped membrane) downstream 121a are designed to deform depending on the movement of the moving part 45 so as to create between these lips 120a, 121a and the wall 44a of the chamber 44, a first space 123a alternately:
  • expandable when moving part 45 is moved away from the first wall 44a of the chamber; And
  • compressible when the moving part 45 is brought closer to the first wall 44a.

La pièce 45 est déplacée par le moteur 46 est alternativement éloignée et rapprochée de la première paroi 44a.The part 45 is moved by the motor 46 and is alternately moved away from and brought closer to the first wall 44a.

Sur une première partie P1 du déplacement alternatif de ladite pièce mobile 45 par rapport à la chambre 44, la lèvre circulaire amont 120a est toujours écartée de la première paroi 44a ce qui autorise un passage libre entre le premier espace 123a et l'entrée d'aspiration 41.On a first part P1 of the reciprocating movement of said movable part 45 relative to the chamber 44, the upstream circular lip 120a is always spaced from the first wall 44a which allows a free passage between the first space 123a and the inlet of suction 41.

Sur cette première partie P1 dudit déplacement alternatif de ladite pièce mobile 45 par rapport à la chambre 44, la lèvre circulaire amont 120a autorise un passage libre de fluide entre l'entrée d'aspiration 41 et l'espace 123a, peu important la différence de pression de fluide entre l'espace 123a et l'entrée d'aspiration 41.On this first part P1 of said reciprocating movement of said movable part 45 relative to the chamber 44, the upstream circular lip 120a allows a free passage of fluid between the suction inlet 41 and the space 123a, regardless of the difference in fluid pressure between space 123a and suction inlet 41.

Sur une deuxième partie P2 dudit déplacement alternatif de ladite pièce mobile 45, distincte de la première partie du déplacement P1, la lèvre circulaire amont 120a :

  • D'une part autorise un passage de fluide de l'entrée d'aspiration vers l'espace 123a uniquement si la pression de fluide en amont de cette lèvre amont 120a dépasse la pression de fluide dans l'espace 123a d'une valeur d'écart minimale prédéterminée ; et
  • D'une part interdit le passage de fluide du premier espace 123a vers de l'entrée d'aspiration.
On a second part P2 of said reciprocating movement of said movable part 45, distinct from the first part of the movement P1, the upstream circular lip 120a:
  • On the one hand authorizes a passage of fluid from the suction inlet towards the space 123a only if the fluid pressure upstream of this upstream lip 120a exceeds the fluid pressure in the space 123a by a value of predetermined minimum deviation; And
  • On the one hand prohibits the passage of fluid from the first space 123a towards the suction inlet.

Par ailleurs, tout au long du déplacement de ladite pièce mobile 45 par rapport à la chambre 44, la lèvre aval 121a est adaptée à :

  • d'une part créer un contact étanche contre la première paroi 44a tant que la pression de fluide dans l'espace 123a est inférieure à une pression de fluide en aval de cette lèvre aval 121a ; et à
  • d'autre part s'écarter de la première paroi 44a lorsque la pression de fluide dans l'espace 123a est supérieure à la pression de fluide en aval de cette lèvre aval 121a.
Furthermore, throughout the movement of said movable part 45 relative to the chamber 44, the downstream lip 121a is adapted to:
  • on the one hand create a tight contact against the first wall 44a as long as the fluid pressure in the space 123a is lower than a fluid pressure downstream of this downstream lip 121a; and to
  • on the other hand move away from the first wall 44a when the fluid pressure in the space 123a is greater than the fluid pressure downstream of this downstream lip 121a.

En d'autres termes, cette première lèvre circulaire aval 121a est agencée pour que tout au long dudit déplacement de ladite pièce mobile 45 par rapport à la chambre 44 :

  • elle autorise le passage de fluide du premier espace 123a vers ladite sortie de refoulement 42 ; et
  • elle interdise le passage de fluide ladite sortie de refoulement 42 vers ledit premier espace 123a.
In other words, this first downstream circular lip 121a is arranged so that throughout said movement of said movable part 45 relative to the chamber 44:
  • it allows the passage of fluid from the first space 123a towards said discharge outlet 42; And
  • it prevents the passage of fluid from said discharge outlet 42 to said first space 123a.

Ainsi, l'espace 123a est alternativement en dépression et ouvert vers l'entrée d'aspiration 41 pour y aspirer du fluide (gaz ou liquide) et en surpression et ouvert vers la sortie de refoulement 42 pour y chasser ce fluide.Thus, the space 123a is alternately in depression and open towards the suction inlet 41 to suck in fluid (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid.

Ces lèvres circulaires amont et aval 120a, 121a confèrent une capacité auto-amorçante à la pompe.These upstream and downstream circular lips 120a, 121a give a self-priming capacity to the pump.

Le déplacement alternatif de la pièce mobile 45 induit une aspiration de fluide de l'entrée d'aspiration 41 vers le premier espace 123a sur la première partie P1 du déplacement puis une expulsion de fluide du premier espace 123a vers la sortie de refoulement 42 sur la deuxième partie P2 dudit déplacement alternatif.The reciprocating movement of the moving part 45 induces a suction of fluid from the suction inlet 41 towards the first space 123a on the first part P1 of the movement then an expulsion of fluid from the first space 123a towards the discharge outlet 42 on the second part P2 of said reciprocating movement.

Pour doubler cet effet d'aspiration / expulsion de fluide / liquide, on peut faire en sorte, comme illustré sur les modes des figures 1a, 2, 3, 4, 5, 6 et 7, que la pompe comporte une seconde lèvre amont 120b et une seconde lèvre aval 121b prévues pour se déformer en fonction du déplacement de la pièce mobile 45 de manière à créer entre ces lèvres 120b, 121b et une deuxième parois 44b de la chambre 44, un second espace 123b :

  • expansible lorsque l'on écarte la pièce mobile 45 vis-à-vis de la seconde paroi 44b de la chambre ; et
  • compressible lorsque l'on rapproche la pièce mobile 45 vis-à-vis de la seconde paroi 44b.
To double this effect of suction/expulsion of fluid/liquid, we can ensure, as illustrated in the modes of the figures 1a , 2 , 3 , 4 , 5, 6 And 7 , that the pump comprises a second upstream lip 120b and a second downstream lip 121b designed to deform according to the movement of the moving part 45 so as to create between these lips 120b, 121b and a second wall 44b of the chamber 44, a second space 123b:
  • expandable when moving part 45 is moved away from the second wall 44b of the chamber; And
  • compressible when the moving part 45 is brought closer to the second wall 44b.

En l'occurrence, la pièce 45 est mobile entre les première et seconde parois 44a, 44b de la chambre 44.In this case, the part 45 is movable between the first and second walls 44a, 44b of the chamber 44.

Lors de son déplacement par le moteur, la pièce 45 est alternativement éloignée et rapprochée de la seconde paroi 44b.During its movement by the motor, the part 45 is alternately moved away from and brought closer to the second wall 44b.

Ces secondes lèvres amont et aval 120b, 121b sont préférentiellement circulaires, la pièce mobile 45 étant alors soit discoïdale, comme sur la figure 1a, 1b, 5, 6, 7, 8, soit tubulaire (comme sur les figures 2, 3, 4).These second upstream and downstream lips 120b, 121b are preferably circular, the moving part 45 then being either discoidal, as on the figure 1a , 1b , 5, 6 , 7, 8 , or tubular (as on the figures 2, 3 , 4 ).

Toutefois, ces secondes lèvres amont et aval 120b, 121b peuvent être rectilignes comme sur la figure 9, la pièce mobile 45 étant alors en forme de ruban (comme sur la figure 9), la pièce 45 pouvant être rigide ou déformable élastiquement suivant la longueur du ruban.However, these second upstream and downstream lips 120b, 121b can be rectilinear as on the Figure 9 , the moving part 45 then being in the form of a ribbon (as on the Figure 9 ), the part 45 being able to be rigid or elastically deformable depending on the length of the ribbon.

La seconde lèvre amont 120b est placée à plus grande proximité de l'entrée d'aspiration 41 que de la sortie de refoulement 42 et la seconde lèvre aval 121b est placée à plus grande proximité de la sortie de refoulement 42 que de l'entrée d'aspiration 41.The second upstream lip 120b is placed closer to the suction inlet 41 than to the discharge outlet 42 and the second downstream lip 121b is placed closer to the discharge outlet 42 than to the inlet d aspiration 41.

Ces secondes lèvres amont et aval 120b, 121b sont placées entre un des côtés de ladite pièce mobile 45 et une seconde paroi 44b de la chambre 44 pour définir un second espace 123b entre ces secondes lèvres amont et aval 120b, 121b.These second upstream and downstream lips 120b, 121b are placed between one of the sides of said movable part 45 and a second wall 44b of the chamber 44 to define a second space 123b between these second upstream and downstream lips 120b, 121b.

La seconde lèvre amont 120b est adaptée pour que sur une troisième partie dudit déplacement alternatif de ladite pièce mobile 45 par rapport à la chambre 44, la seconde lèvre amont 120b autorise un passage de fluide libre entre ledit second espace 123b et ladite entrée d'aspiration 41.The second upstream lip 120b is adapted so that on a third part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second upstream lip 120b allows a passage of free fluid between said second space 123b and said suction inlet 41.

En d'autres termes, cette seconde lèvre amont 120b est dimensionnée pour que sur toute la troisième partie dudit déplacement alternatif de ladite pièce mobile 45 par rapport à la chambre 44, cette seconde lèvre amont 120b soit écartée de la seconde paroi 44b.In other words, this second upstream lip 120b is dimensioned so that over the entire third part of said reciprocating movement of said movable part 45 relative to the chamber 44, this second upstream lip 120b is spaced from the second wall 44b.

Préférentiellement, cette troisième partie du déplacement correspond à ladite seconde partie du déplacement.Preferably, this third part of the movement corresponds to said second part of the movement.

La seconde lèvre amont 120b est aussi adaptée pour que tout au long d'une quatrième partie dudit déplacement de ladite pièce mobile 45 par rapport à la chambre 44, cette seconde lèvre amont 120b :

  • crée un contact étanche contre la seconde paroi 44b tant que la pression de fluide dans le second espace 123b est supérieur à une pression de fluide en amont de cette seconde lèvre amont 120b ; et
  • autorise le passage de fluide de l'entrée d'aspiration 41 vers du second espace 123b lorsque la pression de fluide en amont de cette seconde lèvre amont 120b est supérieure à la pression de fluide dans le second espace 123b.
The second upstream lip 120b is also adapted so that throughout a fourth part of said movement of said movable part 45 relative to the chamber 44, this second upstream lip 120b:
  • creates a tight contact against the second wall 44b as long as the fluid pressure in the second space 123b is greater than a fluid pressure upstream of this second upstream lip 120b; And
  • authorizes the passage of fluid from the suction inlet 41 to the second space 123b when the fluid pressure upstream of this second upstream lip 120b is greater than the fluid pressure in the second space 123b.

Préférentiellement, cette quatrième partie du déplacement correspond à ladite première partie du déplacement de la pièce 45.Preferably, this fourth part of the movement corresponds to said first part of the movement of the part 45.

La seconde lèvre aval 121b est adaptée pour que tout au long dudit déplacement de ladite pièce mobile 45 par rapport à la chambre 44 :

  • cette seconde lèvre aval 121b crée un contact étanche contre la seconde paroi 44b tant que la pression de fluide dans le second espace 123b est inférieure à une pression de fluide en aval de cette seconde lèvre aval 121b ; et
  • cette seconde lèvre aval 121b s'écarte de la seconde paroi 44b lorsque la pression de fluide dans l'espace 123b est supérieure à la pression de fluide en aval de cette lèvre aval 121b.
The second downstream lip 121b is adapted so that throughout said movement of said movable part 45 relative to the chamber 44:
  • this second downstream lip 121b creates a tight contact against the second wall 44b as long as the fluid pressure in the second space 123b is lower than a fluid pressure downstream of this second downstream lip 121b; And
  • this second downstream lip 121b deviates from the second wall 44b when the fluid pressure in the space 123b is greater than the fluid pressure downstream of this downstream lip 121b.

Ainsi, le second espace 123b est alternativement en dépression et ouvert vers l'entrée d'aspiration 41 pour y aspirer du fluide (gaz ou liquide) et en surpression et ouvert vers la sortie de refoulement 42 pour y chasser ce fluide.Thus, the second space 123b is alternately in depression and open towards the suction inlet 41 to suck in fluid (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid.

Dans le cas des figures 1a, 5, 6 et 7, comme la pièce mobile 45 forme un disque évidé en son centre, ce second espace 123b forme un espace annulaire s'étendant entre la seconde paroi 44b et le second côté de la pièce mobile 45 qui est en vis-à-vis de cette seconde paroi 44b. Dans ces modes des figures 1a, 5, 6 et 7, les secondes lèvres amont et aval sont circulaires 120a, 121b.In the case of figures 1a , 5 , 6 And 7 , as the movable part 45 forms a hollow disc in its center, this second space 123b forms an annular space extending between the second wall 44b and the second side of the movable part 45 which is opposite this second wall 44b. In these modes of figures 1a , 5 , 6 And 7 , the seconds upstream and downstream lips are circular 120a, 121b.

Comme on le comprend notamment de la figure 1a, ces secondes lèvres amont et aval 120b, 121b sont telles que, sur la troisième partie dudit déplacement alternatif de ladite pièce mobile 45 par rapport à la chambre 44, la seconde lèvre aval 121b réalise une étanchéité interdisant le passage de fluide de ladite sortie de refoulement 42 vers ledit second espace 123b, la seconde lèvre amont 120b autorisant alors un passage de fluide libre entre ledit second espace 123b et ladite l'entrée d'aspiration 41.As we understand in particular from the figure 1a , these second upstream and downstream lips 120b, 121b are such that, on the third part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second downstream lip 121b provides a seal preventing the passage of fluid from said outlet of discharge 42 towards said second space 123b, the second upstream lip 120b then authorizing a passage of free fluid between said second space 123b and said suction inlet 41.

Sur cette troisième partie dudit déplacement alternatif de ladite pièce mobile 45, la seconde lèvre amont 120b est éloignée de l'une desdites seconde paroi 44b ou pièce mobile 45 pour générer un passage de fluide libre, c'est-à-dire un espace libre entre ledit second espace 123b et ladite l'entrée d'aspiration 41.On this third part of said reciprocating movement of said movable part 45, the second upstream lip 120b is moved away from one of said second wall 44b or movable part 45 to generate a free fluid passage, that is to say a free space between said second space 123b and said suction inlet 41.

Ainsi, sur cette troisième partie dudit déplacement alternatif, comme le second espace 123b est fermé vers l'aval et ouvert vers l'amont, on obtient un effet d'aspiration de fluide de l'entrée d'aspiration 41 vers le second espace 123b en écartant la pièce mobile 45 vis-à-vis de la seconde paroi 44b.Thus, on this third part of said reciprocating movement, as the second space 123b is closed towards the downstream and open towards the upstream, we obtain an effect of suction of fluid from the suction inlet 41 towards the second space 123b by moving the moving part 45 away from the second wall 44b.

Comme on le comprend notamment des figures 1 à 7, ces secondes lèvres circulaires amont et aval 120b, 121b sont telles que sur la quatrième partie dudit déplacement alternatif de ladite pièce mobile 45 par rapport à la chambre 44, la seconde lèvre amont 120b réalise une étanchéité interdisant le passage de fluide dudit second espace 123b vers ladite l'entrée d'aspiration 41, la seconde lèvre aval 121b étant agencée pour :

  • d'une part autoriser le passage de fluide entre ledit second espace 123b et ladite sortie de refoulement 42 lorsqu'une pression de fluide à l'intérieure du ledit second espace 123b est supérieure à une pression de fluide au niveau de la sortie de refoulement 42 ; et pour
  • d'autre part interdire le passage de fluide ladite sortie de refoulement 42 vers ledit second espace 123b.
As we understand in particular from figures 1 to 7 , these second upstream and downstream circular lips 120b, 121b are such that on the fourth part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second upstream lip 120b provides a seal preventing the passage of fluid from said second space 123b towards said suction inlet 41, the second downstream lip 121b being arranged to:
  • on the one hand authorize the passage of fluid between said second space 123b and said discharge outlet 42 when a fluid pressure inside said second space 123b is greater than a fluid pressure at the discharge outlet 42 ; and for
  • on the other hand prohibit the passage of fluid from said discharge outlet 42 to said second space 123b.

Ainsi, sur cette quatrième partie dudit déplacement alternatif, comme le second espace 123b est fermé vers l'amont et ouvert vers l'aval uniquement lorsque la pression de fluide dans le second espace 123b est supérieure à une pression de fluide au niveau de la sortie de refoulement 42, on obtient un refoulement de fluide du second espace 123b vers la sortie de refoulement 42 en rapprochant la pièce mobile 45 vis-à-vis de la seconde paroi 44b.Thus, on this fourth part of said reciprocating movement, as the second space 123b is closed upstream and opened downstream only when the fluid pressure in the second space 123b is greater than a fluid pressure at the outlet. discharge 42, a discharge of fluid is obtained from the second space 123b towards the discharge outlet 42 by bringing the movable part 45 closer to the second wall 44b.

Le déplacement alternatif de la pièce mobile 45 induit une aspiration de fluide de l'entrée d'aspiration 41 vers le second espace 123a puis une expulsion de fluide du second espace 123b vers la sortie de refoulement 42.The reciprocating movement of the moving part 45 induces a suction of fluid from the suction inlet 41 towards the second space 123a then an expulsion of fluid from the second space 123b towards the discharge outlet 42.

Ainsi, grâce aux paires de lèvres placées de part et d'autre de la pièce 45 on a, sur un cycle de déplacement de la pièce 45, deux aspirations et deux refoulements ce qui permet d'obtenir un débit de fluide plus homogène dans le temps.Thus, thanks to the pairs of lips placed on either side of the part 45 we have, on a cycle of movement of the part 45, two suctions and two discharges which makes it possible to obtain a more homogeneous flow of fluid in the time.

Il est à noter que le nombre de lèvres en vis-à-vis de chaque face de la pièce mobile 45 peut être variable.It should be noted that the number of lips facing each face of the moving part 45 can be variable.

Ainsi, si une face de la pièce mobile ne comporte pas de lèvre en vis-à-vis alors, c'est soit parce que cette face n'est pas utilisée pour le pompage (cas d'une pièce mobile en forme de disque non évidé en son centre), soit parce que c'est la pièce mobile 45 qui est déformable pour établir une étanchéité contre la paroi correspondante de la chambre.Thus, if one face of the moving part does not have a lip opposite then, it is either because this face is not used for pumping (case of a moving part in the shape of a disc not hollowed out in its center), or because it is the moving part 45 which is deformable to establish a seal against the corresponding wall of the chamber.

L'usage d'une seule lèvre d'un côté de la pièce mobile permet uniquement de s'opposer à un retour de fluide.The use of a single lip on one side of the moving part only makes it possible to prevent a return of fluid.

L'usage de deux lèvres d'un même côté de la pièce mobile 45 permet de créer l'espace entre une lèvre amont et une lèvre aval pour obtenir un effet d'autoamorçage à sec de la pompe.The use of two lips on the same side of the moving part 45 makes it possible to create the space between an upstream lip and a downstream lip to obtain a dry self-priming effect of the pump.

Avec plus de deux lèvres d'un même côté de la pièce mobile 45, on augmente la pression différentielle générée entre la sortie de refoulement et l'entrée d'aspiration de la pompe.With more than two lips on the same side of the moving part 45, the differential pressure generated between the delivery outlet and the suction inlet of the pump is increased.

Ainsi, en fonction de la pression différentielle souhaitée, on peut avoir trois lèvres par côté de pièce mobile ou plus.Thus, depending on the desired differential pressure, we can have three lips per side of the moving part or more.

Il a été remarqué que dans certaines conditions, une lèvre donnée peut venir se plaquer et faire ventouse contre un support de cette lèvre (la paroi de chambre ou la pièce mobile).It has been noted that under certain conditions, a given lip can press against a support of this lip (the chamber wall or the moving part) and act as a suction cup.

Le comportement de la pompe 100 est alors dégradé car cette lèvre donnée n'assure plus sa fonction d'étanchéité.The behavior of the pump 100 is then degraded because this given lip no longer ensures its sealing function.

Pour éviter cela, comme illustré sur les figures 1, 5, 6,7 et 8, ont fait en sorte de créer au moins un passage 48, 49 de fluide entre la lèvre donnée et son support 124.To avoid this, as shown in the figures 1 , 5 , 6 , 7 and 8 , have ensured to create at least one passage 48, 49 of fluid between the given lip and its support 124.

Chaque au moins un passage de fluide 48, 49 entre une lèvre donnée et son support 124 est tel que lorsque cette lèvre vient en appui contre son support, du fluide puisse continuer à circuler entre cette lèvre et son support. On évite ainsi l'effet ventouse.Each at least one fluid passage 48, 49 between a given lip and its support 124 is such that when this lip comes to rest against its support, fluid can continue to circulate between this lip and its support. This avoids the suction effect.

Pour cela, on peut soit créer des irrégularités de forme entre la lèvre donnée et son support telles que :

  • des bossages 48 portés par la lèvre donnée et orientés vers son support ; et/ou
  • des bossages portés par le support 124 et orientés vers la lèvre donnée qu'il supporte ; et/ou
  • des canaux (zones creuses) portés par la lèvre donnée et orientés vers son support 124 ; et/ou
  • des canaux 49 (zones creuses) portés par le support 124 et orientés vers la lèvre donnée qu'il supporte.
To do this, we can either create shape irregularities between the given lip and its support such as:
  • bosses 48 carried by the given lip and oriented towards its support; and or
  • bosses carried by the support 124 and oriented towards the given lip that it supports; and or
  • channels (hollow areas) carried by the given lip and oriented towards its support 124; and or
  • channels 49 (hollow areas) carried by the support 124 and oriented towards the given lip that it supports.

Préférentiellement, chaque bossage 48 ou canal 49 s'étend longitudinalement d'une extrémité de la lèvre donnée vers un point de jonction entre cette lèvre et son support.Preferably, each boss 48 or channel 49 extends longitudinally from one end of the given lip towards a junction point between this lip and its support.

On préfère généralement que les bossages et/ou canaux soient uniquement formés / portés sur le support 124 de la lèvre plutôt que sur la lèvre elle-même car cette lèvre est alors déformable de manière homogène.It is generally preferred that the bosses and/or channels are only formed/carried on the support 124 of the lip rather than on the lip itself because this lip is then deformable in a homogeneous manner.

Le fait d'avoir un bossage ou un canal porté par une lèvre donnée induit des zones de déformations privilégiées sur la lèvre qui peuvent induire des pertes d'étanchéité préjudiciables au fonctionnement de la pompe 100.The fact of having a boss or a channel carried by a given lip induces privileged deformation zones on the lip which can induce losses of sealing detrimental to the operation of the pump 100.

Dans le cas où la lèvre donnée est annulaire / circulaire, on préfère que ces bossages ou canaux soient formés sur le support de la lèvre pour y former des rayons centrés autour d'un axe de symétrie de la lèvre donnée.In the case where the given lip is annular/circular, it is preferred that these bosses or channels are formed on the support of the lip to form rays centered around an axis of symmetry of the given lip.

Dans ce cas, ledit au moins un passage de fluide 48, 49 formé entre la lèvre donnée et son support 124 s'étend radialement par rapport à un axe central de symétrie X-X de cette au moins une lèvre donnée.In this case, said at least one fluid passage 48, 49 formed between the given lip and its support 124 extends radially with respect to a central axis of symmetry X-X of this at least one given lip.

Dans le cas où la lèvre donnée est rectiligne, comme sur la figure 9 on préfère former des bossages ou canaux rectilignes sur le support de la lèvre, ces bossages ou canaux étant perpendiculaires à la lèvre.In the case where the given lip is straight, as on the Figure 9 it is preferred to form rectilinear bosses or channels on the support of the lip, these bosses or channels being perpendicular to the lip.

Comme on le voit sur les figures 1b à 8, chacune desdites lèvres, lorsque observée dans un plan de coupe passant par un axe central de symétrie (X-X) commun à ces dites lèvres, comporte une section propre s'étendant sur une majeure partie de longueur de cette lèvre donnée, cette section propre de cette lèvre ayant une épaisseur constante E dans ce plan de coupe.As seen on the figures 1b to 8 , each of said lips, when observed in a section plane passing through a central axis of symmetry (XX) common to these said lips, comprises a proper section extending over a major part of the length of this given lip, this proper section of this lip having a constant thickness E in this cutting plane.

Ainsi, la section propre d'épaisseur constante E d'une lèvre donnée s'étend sur une majeur partie de la longueur de cette lèvre donnée vue dans ledit plan de coupe passant par l'axe de symétrie X-X de cette lèvre.Thus, the clean section of constant thickness E of a given lip extends over a major part of the length of this given lip seen in said cutting plane passing through the axis of symmetry XX of this lip.

L'épaisseur d'une section propre d'une lèvre donnée est considérée comme constante dès lors que l'épaisseur minimale de lèvre mesurée dans cette section propre est supérieure à 70% de l'épaisseur maximale de lèvre mesurée dans cette la section propre.The thickness of a clean section of a given lip is considered constant when the minimum lip thickness measured in this clean section is greater than 70% of the maximum lip thickness measured in this clean section.

Les épaisseurs propres constantes E des lèvres amont 120a, 120b sont préférentiellement identiques entre elles.The constant natural thicknesses E of the upstream lips 120a, 120b are preferably identical to each other.

De même, les épaisseurs propres constantes E des lèvres aval 121a, 121b sont préférentiellement identiques entre elles.Likewise, the constant natural thicknesses E of the downstream lips 121a, 121b are preferably identical to each other.

Il est à noter que les épaisseurs propres constantes E des lèvres amont 120a, 120b sont préférentiellement supérieures aux épaisseurs propres constantes E des lèvres aval 121a, 121b.It should be noted that the constant natural thicknesses E of the upstream lips 120a, 120b are preferentially greater than the constant natural thicknesses E of the downstream lips 121a, 121b.

La longueur d'une lèvre donnée est la distance mesurée entre un point d'attache de cette lèvre donnée à son support 124 et un point d'extrémité de cette lèvre donnée, ces points d'attache et d'extrémité étant observés dans le plan de coupe passant par l'axe central de symétrie X-X.The length of a given lip is the distance measured between a point of attachment of this given lip to its support 124 and an end point of this given lip, these attachment and end points being observed in the plane section passing through the central axis of symmetry X-X.

Préférentiellement, chacune des lèvres comporte une extrémité biseautée lorsqu'elle est observée dans ledit plan de coupe, le biseau constituant une surface d'étanchéité destinée à venir alternativement en appui pour réaliser une étanchéité ou à être écartée pour laisser passer du fluide.Preferably, each of the lips has a beveled end when observed in said cutting plane, the bevel constituting a sealing surface intended to alternately come to bear to provide a seal or to be separated to allow fluid to pass.

L'extrémité biseauté augmente la surface d'étanchéité de la lèvre et améliore sa résistance (même si la partie biseautée présente une zone détériorée, elle reste capable de réaliser une étanchéité sélective tout autour de cette zone détériorée).The beveled end increases the sealing surface of the lip and improves its resistance (even if the beveled part has a damaged area, it remains capable of achieving selective sealing all around this damaged area).

Préférentiellement, dans ladite première lèvre circulaire amont 120a présente une surface intérieure conique orientée vers un axe central de symétrie X-X de cette première lèvre circulaire amont 120a, cette surface intérieure conique s'étendant entre une base circulaire de cette première lèvre circulaire amont 120a et une extrémité circulaire de cette première lèvre circulaire amont 120a.Preferably, in said first upstream circular lip 120a has an interior surface conical oriented towards a central axis of symmetry XX of this first upstream circular lip 120a, this conical interior surface extending between a circular base of this first upstream circular lip 120a and a circular end of this first upstream circular lip 120a.

La surface intérieure conique d'une lèvre donnée qui s'étend entre une base circulaire de cette lèvre donnée et une extrémité circulaire de cette lèvre donnée permet de réduire au minimum la surface intérieure de cette lèvre qui est exposée au fluide sous pression.The conical interior surface of a given lip which extends between a circular base of this given lip and a circular end of this given lip allows to minimize the interior surface of this lip which is exposed to the fluid under pressure.

En réduisant cette surface exposée au fluide sous pression, on limite le risque que la lèvre donnée ne se gonfle vers l'extérieur sous l'effet du fluide.By reducing this surface exposed to the fluid under pressure, we limit the risk of the given lip swelling outwards under the effect of the fluid.

Une telle surface intérieure conique permet d'augmenter la pression maximale pouvant être générée par la pompe.Such a conical interior surface makes it possible to increase the maximum pressure that can be generated by the pump.

Pour cela, on préfèrera que ladite seconde lèvre circulaire amont 120b présente aussi une surface intérieure conique orientée vers un axe central de symétrie X-X de cette seconde lèvre circulaire amont 120b. Cette surface intérieure conique de cette seconde lèvre circulaire amont 120b s'étendant entre une base circulaire de cette seconde lèvre circulaire amont 120b et une extrémité circulaire de cette seconde lèvre circulaire amont 120b.For this, it will be preferred that said second upstream circular lip 120b also has a conical interior surface oriented towards a central axis of symmetry X-X of this second upstream circular lip 120b. This conical interior surface of this second upstream circular lip 120b extends between a circular base of this second upstream circular lip 120b and a circular end of this second upstream circular lip 120b.

Pour la même raison, on préfèrera que chaque lèvre circulaire aval 121a, 121b présente une surface intérieure conique orientée vers un axe central de symétrie X-X de cette lèvre circulaire aval 121a, 121b.For the same reason, it will be preferred that each downstream circular lip 121a, 121b has a conical interior surface oriented towards a central axis of symmetry X-X of this downstream circular lip 121a, 121b.

Cette surface intérieure conique de lèvre circulaire aval 121a, 121b s'étend entre une base circulaire de cette lèvre circulaire aval 121a, 121b et une extrémité circulaire de cette lèvre circulaire aval 121a, 121b.This conical interior surface of the downstream circular lip 121a, 121b extends between a circular base of this downstream circular lip 121a, 121b and a circular end of this downstream circular lip 121a, 121b.

Préférentiellement, chaque surface intérieure conique d'une des lèvres circulaires donnée 120a, 121a, 120b, 121b présente un angle de cône inférieur ou égal à 40° par rapport à un plan dans lequel s'étend la base circulaire de cette lèvre circulaire donnée.Preferably, each conical interior surface of one of the given circular lips 120a, 121a, 120b, 121b has a cone angle less than or equal to 40° relative to a plane in which the circular base of this given circular lip extends.

Le fait d'avoir un angle de cône inférieur ou égal à 40° permet, lors du déplacement de la pièce mobile 45 par rapport à la paroi de chambre de maximiser une déformation radiale de la lèvre tout en minimisant sa déformation axiale le long de l'axe X-X. Ainsi on minimise l'effort de la lèvre s'opposant au déplacement de la pièce mobile et on réduit l'usure de la lèvre.Having a cone angle less than or equal to 40° allows, when moving the moving part 45 relative to the chamber wall, to maximize radial deformation of the lip while minimizing its axial deformation along the length of the lip. the X-X axis. This minimizes the force of the lip opposing the movement of the moving part and reduces the wear of the lip.

Préférentiellement, chacune desdites lèvres 120a, 120b, 121a, 121b est constituée d'un matériau présentant un module de Young compris entre 1MPa et 220MPa.Preferably, each of said lips 120a, 120b, 121a, 121b is made of a material having a Young's modulus of between 1MPa and 220MPa.

Ainsi, la lèvre présente un compromis permettant la flexion nécessaire au déplacement de la pièce mobile 45 tout en limitant sa déformation radiale sous l'effet de la pression de fluide.Thus, the lip presents a compromise allowing the bending necessary for the movement of the moving part 45 while limiting its radial deformation under the effect of the fluid pressure.

Dans chacun des modes de réalisations illustrés sur les figures 1, 1b, 2, 3, 5, 6, 8, 12, les premières lèvres circulaires amont et aval 120a, 121a sont portées par une embase commune à ces lèvres assemblée de manière amovible sur la première paroi 44a de la chambre 44.In each of the embodiments illustrated on the figures 1 , 1b , 2, 3 , 5, 6 , 8 , 12, the first upstream and downstream circular lips 120a, 121a are carried by a base common to these lips assembled removably on the first wall 44a of the chamber 44.

De manière similaire les premières lèvres circulaires amont et aval 120b, 121b sont portées par une embase commune à ces lèvres assemblée de manière amovible sur la seconde paroi 44b de la chambre 44.Similarly, the first upstream and downstream circular lips 120b, 121b are carried by a base common to these lips assembled removably on the second wall 44b of the chamber 44.

Ainsi, les lèvres peuvent être remplacées ensemble en démontant les embases qui les supportent.Thus, the lips can be replaced together by dismantling the bases which support them.

Alternativement, comme illustré sur les figures 4 et 7, les premières lèvres circulaires amont et aval 120a, 121a peuvent être portées par ladite pièce mobile 45.Alternatively, as illustrated in the figures 4 And 7 , the first upstream and downstream circular lips 120a, 121a can be carried by said moving part 45.

De la même manière que décrit précédemment, une embase commune à ces lèvres peut être assemblée de manière amovible sur la pièce mobile 45.In the same way as described previously, a base common to these lips can be assembled removably on the moving part 45.

Ce mode de réalisation permet le remplacement des lèvres 120a et 121a indépendamment de la pièce mobile 45.This embodiment allows the replacement of lips 120a and 121a independently of the moving part 45.

Comme illustré sur les figures a, 1b, 5, 6, 7, le déplacement alternatif de la pièce mobile 45 peut être un déplacement axial le long d'un axe central de symétrie X-X de la pièce mobile 45 qui est une forme de révolution.As illustrated in Figures a, 1b, 5, 6, 7, the reciprocating movement of the moving part 45 can be an axial movement along a central axis of symmetry X-X of the moving part 45 which is a form of revolution.

Alternativement, comme illustré sur les figures 2 à 4, le déplacement alternatif de la pièce mobile (45) peut être un déplacement radial autour d'un axe central de symétrie X-X de la pièce mobile 45 qui est de forme tubulaire.Alternatively, as illustrated in the figures 2 to 4 , the reciprocating movement of the moving part (45) can be a radial movement around a central axis of symmetry XX of the moving part 45 which is of tubular shape.

Le moteur 46 peut se trouver à l'intérieur de la chambre comme sur les figures 2, 3, 4 ou se trouver à l'extérieur de la chambre, comme sur les figures 1a, 5 et 6.The motor 46 can be found inside the chamber as on the figures 2, 3 , 4 or be outside the room, as on the figures 1a , 5 and 6 .

Claims (22)

  1. A fluid flow pump (100) comprising a suction inlet (41), a discharge outlet (42), a chamber (44) in fluid flow connection with the suction inlet (41) and with the discharge outlet (42), a movable part (45) arranged inside the chamber (44), and at least one motor (46) mechanically connected to the movable part (45) to move it inside the chamber (44), wherein the pump (100) includes a first upstream lip (120a) placed closer to the suction inlet (41) than to the discharge outlet (42) and a first downstream lip (121a) placed closer to the discharge outlet (42) than to the suction inlet (41), these first upstream and downstream lips (120a, 121a) being placed between one of the sides of said movable part (45) and a first wall (44a) of the chamber (44) to define a first space (123a) between the first upstream and downstream lips (120a, 121a), these first upstream and downstream lips (120a, 121a) being such that:
    · over a first portion (P1) of said movement of said movable part (45) relative to the chamber (44), the first downstream lip (121a) provides sealing preventing fluid from passing from said discharge outlet (42) to said first space (123a), the first upstream lip (120a) being always spaced apart from the first wall (44a) for allowing free passage for fluid between said first space (123a) and said suction inlet (41); and that
    · over a second portion (P2) of said reciprocating motion of said movable part (45) relative to the chamber (44), different from the first portion of the movement (P1), the first upstream lip (120a) provides sealing preventing fluid from passing from said first space (123a) to said suction inlet (41), the first downstream lip (121a) being arranged so that throughout said movement of said movable part (45) relative to the chamber (44):
    · it allows fluid to pass from the first space (123a) to said discharge outlet (42); and
    · it prevents fluid from passing from said discharge outlet (42) to said first space (123a).
  2. A pump according to claim 1, wherein at least one of said lips is carried by a support (124), at least one fluid passage (48, 49) being formed between this at least one given lip and its support (124), the at least one fluid passage (48, 49) being such that when said at least one given lip bears against its support (124), fluid can flow via said at least one fluid passage (48, 49) between the at least one given lip and its support (124).
  3. A pump according to claim 2, wherein said at least one fluid passage (48, 49) formed between said at least one given lip and its support (124) is formed along a projection carried by the support (124).
  4. A pump according to claim 2, wherein said at least one fluid passage (48, 49) formed between said at least one given lip and its support (124) is formed along a projection carried by said at least one given lip.
  5. A pump according to claim 2, wherein said at least one fluid passage (48, 49) formed between said at least one given lip and its support (124) is a channel carried by the support (124).
  6. A pump according to claim 2, wherein said at least one fluid passage (48, 49) formed between said at least one given lip and its support (124) is a channel carried by said at least one given lip.
  7. A pump according to claim 2, wherein said at least one fluid passage (48, 49) formed between said at least one given lip and its support (124) extends radially relative to a central axis of symmetry of said at least one given lip.
  8. A pump according to any one of claims 1 to 7, wherein when observed in a section plane containing a central axis of symmetry (X-X) that is common to said lips, each of said lips (120a, 120b, 121a, 121b) has a specific section extending over a major portion of the length of the given lip, this specific section of the lip being of constant thickness (E) in the section plane.
  9. A pump according to any one of claims 1 to 8, wherein said first upstream lip (120a) is a circular lip that presents a conical inside surface facing towards a central axis of symmetry (X-X) of the first upstream lip (120a), the conical inside surface extending between a circular base of the first upstream lip (120a) and a circular end of the first upstream lip (120a).
  10. A pump according to claim 9, wherein said conical inside surface of said first upstream lip (120a) presents a cone angle that is less than or equal to 40° relative to a plane in which the circular base of the first upstream lip (120a) extends.
  11. A pump according to any one of claims 1 to 10, wherein each of said lips is made of a material that presents a Young's modulus lying in the range 1 MPa to 220 MPa.
  12. A pump according to any one of claims 1 to 11, wherein the first upstream and downstream lips (120a and 121a) are carried by a base that is common to those lips, which base is releasably assembled on the first wall (44a) of the chamber (44).
  13. A pump according to any one of claims 1 to 11, wherein the first upstream and downstream lips (120a, 121a) are carried by said movable part (45).
  14. A pump according to any one of claims 1 to 11, wherein the motor (46) being connected to the movable part (45) via a coupling mechanism (52) in such a manner that actuating the motor (46) gives rise to reciprocating motion of the movable part (45) relative to the chamber in order to move a fluid from the suction inlet to the discharge outlet.
  15. A pump according to claim 14, wherein the reciprocating motion of the movable part (45) is axial motion along a central axis of symmetry of the movable part (45), which is in the shape of a body of revolution.
  16. A pump according to claim 14, wherein the reciprocating motion of the movable part (45) is radial motion about a central axis of symmetry of the movable part, which is tubular in shape.
  17. A pump according to any one of claims 1 to 16, wherein said motor is an electric motor located outside the chamber (44).
  18. A pump according to any one of claims 1 to 16, wherein said motor is an electric motor located inside the chamber (44).
  19. A pump according to any one of claims 1 to 18, wherein the motor is connected to a control unit (UC), the control unit being arranged to regulate the operation of the motor (46) as a function of at least one value previously estimated by the control unit.
  20. A pump according to any one of claims 1 to 19, wherein the pump includes a second wall (44b) of the chamber (44), the part (45) being movable between the first and second walls (44a, 44b) of the chamber (44) under the effect of said at least one motor (46), the pump (100) also including a second upstream lip (120b) placed closer to the suction inlet (41) than to the discharge outlet (42) and a second downstream (121b) placed closer to the discharge outlet (42) than to the suction inlet (41), the second upstream and downstream lips (120b, 121b) being placed between one of the sides of said movable part (45) and said second wall (44b) of the chamber (44) so as to define a second space (123b) between the second upstream and downstream lips (120b, 121b), the second upstream and downstream lips (120b, 121b) being such that:
    · over a third portion of said movement of said movable part (45) relative to the chamber (44), the second downstream lip (121b) provides sealing preventing fluid from passing from said discharge outlet (42) to said first space (123a), the second upstream lip (120b) then allowing a free passage for fluid between said second space (123b) and said suction inlet (41); and that
    · over a fourth portion of said reciprocating motion of said movable part (45) relative to the chamber (44), different from the third portion of the movement, the second upstream lip (120b) provides sealing preventing fluid from passing from said second space (123b) to said suction inlet (41), the second downstream lip (121b) being arranged so that throughout said movement of said movable part (45) relative to the chamber (44):
    · it allows fluid to pass from the second space (123b) to said discharge outlet (42); and
    · it prevents fluid from passing from said discharge outlet (42) to said second space (123a).
  21. A pump according to any one of claims 1 to 20, said pump (4) being self-priming when dry.
  22. A pump according to any preceding claim wherein each of said lips is a circular lip.
EP20724178.7A 2019-05-14 2020-05-13 Fluid circulation pump Active EP3969754B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1905029A FR3096094B1 (en) 2019-05-14 2019-05-14 Fluid circulation pump.
PCT/EP2020/063388 WO2020229568A1 (en) 2019-05-14 2020-05-13 Fluid circulation pump

Publications (3)

Publication Number Publication Date
EP3969754A1 EP3969754A1 (en) 2022-03-23
EP3969754B1 true EP3969754B1 (en) 2024-05-15
EP3969754C0 EP3969754C0 (en) 2024-05-15

Family

ID=67514945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20724178.7A Active EP3969754B1 (en) 2019-05-14 2020-05-13 Fluid circulation pump

Country Status (5)

Country Link
US (1) US20220243716A1 (en)
EP (1) EP3969754B1 (en)
CN (1) CN113853481B (en)
FR (1) FR3096094B1 (en)
WO (1) WO2020229568A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881846A (en) * 1973-08-06 1975-05-06 Outboard Marine Corp Fluid pump with resilient pumping membrane
FR2744769B1 (en) * 1996-02-12 1999-02-12 Drevet Jean Baptiste FLUID CIRCULATOR WITH VIBRATING MEMBRANE
EP2378121A1 (en) * 2010-04-16 2011-10-19 Veinux ApS Pump element for a tube pump
IT201600072149A1 (en) * 2016-07-11 2018-01-11 Leuco Spa Pump to dispense a liquid.

Also Published As

Publication number Publication date
US20220243716A1 (en) 2022-08-04
EP3969754A1 (en) 2022-03-23
FR3096094A1 (en) 2020-11-20
WO2020229568A1 (en) 2020-11-19
CN113853481A (en) 2021-12-28
CN113853481B (en) 2023-08-22
FR3096094B1 (en) 2022-11-25
EP3969754C0 (en) 2024-05-15

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