EP0037294B1 - Single screw pump installation for the transport of pasty products possessing a high viscosity - Google Patents

Single screw pump installation for the transport of pasty products possessing a high viscosity Download PDF

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Publication number
EP0037294B1
EP0037294B1 EP19810400296 EP81400296A EP0037294B1 EP 0037294 B1 EP0037294 B1 EP 0037294B1 EP 19810400296 EP19810400296 EP 19810400296 EP 81400296 A EP81400296 A EP 81400296A EP 0037294 B1 EP0037294 B1 EP 0037294B1
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EP
European Patent Office
Prior art keywords
archimedes
installation
archimedes screw
pump
screws
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EP19810400296
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German (de)
French (fr)
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EP0037294A3 (en
EP0037294A2 (en
Inventor
Edmond Chanton
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Societe Generale de Mecanique et de Metallurgie
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Societe Generale de Mecanique et de Metallurgie
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids

Definitions

  • the product does not descend well, or even does not descend at all to the Archimedes screw when its viscosity is too high (phenomenon of arch at the base of the hopper).
  • the object of the invention is essentially to remedy the shortcomings of known installations, by proposing an arrangement which makes it possible to force the product to enter the Moineau pump even when said product has a very high viscosity, which is simple and inexpensive to put into operation. work, which is not bulky, which can possibly be set up in already existing installations and which certainly avoids the formation of an arch.
  • a second Archimedes screw having a winding pitch opposite to that of the above-mentioned first Archimedes screw, this second screw Archimedes being arranged at the base of the filling hopper and extending approximately parallel to the first Archimedes screw, substantially in the same base plane as the latter and, on the other hand, drive means for making turn the second Archimedes screw in the opposite direction to the first.
  • the Applicant has been able to note that the two counter-rotating screws with reverse pitch offered a grinding and kneading capacity much greater than that of the devices of the prior art, which makes it possible to use the device of the invention to convey products in the form of blocks, such as filter cakes constituted by compact rectangular pieces of large dimensions.
  • the second Archimedes screw rotates in synchronism with the first, and the drive means comprise a coupling without sliding, in particular a gear train, interposed between the two screws.
  • the axis of the rotor of a pump Sparrow rotates eccentrically. Therefore, the axis of the first Archimedes screw describes, in the course of rotation, a cone of revolution having its apex its connection to the axis of the drive motor and resting on the circle described by the axis of the Moineau pump rotor.
  • the opening angle of this cone is very small.
  • the second Archimedes screw has a fixed axis in order to simplify the arrangement of the installation.
  • Cardan couplings or the like are provided at the two ends of the Archimedes screw (s), for coupling to the rotor of the corresponding pump, at one end, and coupling to a shaft d corresponding drive at the other end.
  • Such an arrangement makes it possible to dispense with expensive, fragile and bulky transmission devices which are used in certain known installations in which the axis of the Archimedes screw coupled to the rotor of the Moineau pump remains fixed.
  • the two Archimedes' screws can be axially offset with respect to each other and for the distance separating their axes to be less than their diameter.
  • the two helical screws, considered in axial projection are nested one inside the other, which contributes to further increase the thrust exerted on the pasty product to make it penetrate into the pump.
  • the installation for transporting products having a high viscosity comprises a sparrow pump 1 whose rotor 2 is rotatably coupled to one end of an Archimedean screw 3 and is approximately coaxial with said screw.
  • the other end of the Archimedes screw 3 is coupled in rotation to a shaft provided with a system of axial stops 4 and connected, by means of a coupling flange 5, to a motor of training (not shown).
  • Archimedes' screw 3 is further surmounted by a hopper 6 for the product to be transported.
  • a second Archimedes screw 7 which has a winding pitch opposite to that of the screw 3 and which extends approximately parallel to the first screw 3, and the axes of the screws 3 and 7 define a plane (or base plane) which is approximately parallel to the plane of the base opening of the hopper 6.
  • the two screws 3 and have propellers respectively whose pitch is of the same value and of the same diameter, and they are driven in synchronism in opposite directions to each other (counter-rotating screws).
  • the shafts of the screws 3 and 7 are coupled without sliding, by two identical gears 8, 9, wedged directly on their respective shafts and meshing directly with each other.
  • the axis of the Archimedes screw 3 describes a cone whose summit is its junction with the drive motor shaft 10 and based on the circle described by the axis of the pump rotor. Two couplings are therefore provided to the Cardan joint 11 to connect the Archimedes screw 3 respectively to the rotor 2 and to the motor shaft 10.
  • the second Archimedes screw 7 rotates around a fixed axis and its shaft spins in fixed bearings 12 integral with the frame of the installation.
  • the counter-rotation of the Archimedes 3 and 7 screws causes the product to knead, which, by preventing it from freezing, keeps it in a state which facilitates, as much as possible, its flow.
  • the axes of the rotor of the Moineau pump, of the two Archimedes screws, of the drive shafts and of the motor are located in the same basic plane and that, as a result, the hopper can be arranged relatively low compared to this basic plan.
  • the entire installation can therefore be produced in a very compact form or, at least, without any increase in dimensions compared to the dimensions of an installation with a single Archimedean screw. This advantage is particularly interesting because it allows the replacement of a previous installation by an installation according to the invention without the need to provide increased free space.
  • the second Moineau pump 13 is parallel to the first 1 and the axis of its rotor 14 is approximately aligned with that of the second Archimedes screw 7.
  • the second Archimedes screw 7 can no longer have a fixed axis and must, like screw 3, be connected, by couplings to the Cardan joint 15, to the rotor 14 of the pump 13 and the drive shaft 16 on which the counter-rotating coupling gear 9 is flanged, a system of axial stops 17 being also provided in a manner analogous to system 4.
  • the part of the casing 19 which surrounds the two screws in the outlet zone of these (that is to say in their end zone close to the Moineau pump) closely matches the content. outside of the two screws and extends over an axial length which is equal to at least one helix pitch of the screws.

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

Description

La présente invention concerne des perfectionnements apportés aux installations à pompe Moineau pour le transport de produits pâteux possédant une grande viscosité, comportant:

  • - une trémie de remplissage pour recevoir le produit à transporter,
  • - une vis d'Archimède s'étendant à la base de la trémie,
  • - une pompe Moineau pour déplacer le produit à transporter, lequel produit est amené à force à l'entrée de la pompe par la vis d'Archimède, la vis d'Archimède et le rotor de la pompe étant approximativement coaxiaux et étant accouplés l'un à l'autre en rotation,
  • - et des moyens moteurs pour entraîner en rotation la vis d'Archimède et le rotor de la pompe.
The present invention relates to improvements made to Moineau pump installations for the transport of pasty products having a high viscosity, comprising:
  • - a filling hopper to receive the product to be transported,
  • - an Archimedes screw extending at the base of the hopper,
  • - a Moineau pump for moving the product to be transported, which product is forced to the pump inlet by the Archimedes screw, the Archimedes screw and the pump rotor being approximately coaxial and being coupled one to the other in rotation,
  • - And motor means for rotating the Archimedes screw and the pump rotor.

L'entraînement d'un produit pateux à l'aide d'une pompe Moineau nécessite l'introduction à force dudit produit dans l'embouchure de la pompe. A cette fin, on utilise généralement une vis d'Archimède approximativement coaxiale au rotor de la pompe Moineau et surmontée d'une trémie pour délivrer le produit à la vis d'Archi- mède.The entrainment of a pasty product using a Moineau pump requires the forced introduction of said product into the mouth of the pump. To this end, an Archimedes 'screw is generally used which is approximately coaxial with the rotor of the Moineau pump and surmounted by a hopper to deliver the product to the Archimedes' screw.

Compte tenu de la forme tronconique de la trémie, le produit descend mal, voire même ne descend pas du tout jusqu'à la vis d'Archimède lorsque sa viscosité est trop élevée (phénomène de voûte à la base de la trémie).Given the frustoconical shape of the hopper, the product does not descend well, or even does not descend at all to the Archimedes screw when its viscosity is too high (phenomenon of arch at the base of the hopper).

Pour tenter de pallier cette difficulté, on a proposé d'associer à la vis d'Archimède un batteur rotatif constitué d'un arbre qui est muni de palettes radiales et qui s'étend à peu près parallèlement à la vis d'Archimède en tournant en même sens ou en sens inverse de celli ci. (Voir, par exemple, le DE-A-2 331 585) Il etait ainsi possible d'augmenter sensiblement les dimensions de l'ouverture de base de la trémie, ce qui facilitait l'écoulement du produit et diminuait le risque de formation d'une voûte à la base de la trémie.In an attempt to overcome this difficulty, it has been proposed to combine with the Archimedes screw a rotary beater consisting of a shaft which is provided with radial paddles and which extends roughly parallel to the Archimedes screw by turning in the same direction or in the opposite direction to it. (See, for example, DE-A-2 331 585) It was thus possible to appreciably increase the dimensions of the base opening of the hopper, which facilitated the flow of the product and reduced the risk of formation of 'a vault at the base of the hopper.

Par ailleurs, le malaxage du produit dû à la rotation du batteur empêchait le produit de se figer et contribuait à lui conférer une relative fluidité.Furthermore, the kneading of the product due to the rotation of the beater prevented the product from freezing and contributed to giving it a relative fluidity.

Toutefois, la viscosité restait trop élevée pour que la vis d'Archimède à elle seule puisse forcer une quantité suffisante de produit à pénétrer dans la pompe Moineau, et le fonctionnement restait dans l'ensemble défectueux.However, the viscosity remained too high for the Archimedes screw alone to force a sufficient quantity of product to enter the Moineau pump, and the operation remained generally defective.

Dans une autre installation connue, on a associé, à la vis d'Archimède, deux batteurs contrarotatifs qui malaxent le produit. Si ces deux batteurs contribuent certes à diminuer la viscosité du produit, cette dernière n'est cependant pas suffisamment faible pour qu'à elle seule la pompe Moineau parvienne à aspirer le produit dans des conditions satisfaisantes. Une telle installation ne peut donc pas convenir pour des produits possédant une viscosité trop élevée.In another known installation, two counter-rotating beaters have been associated with the Archimedes screw, which knead the product. While these two beaters certainly help to reduce the viscosity of the product, the latter is not, however, low enough for the Moineau pump alone to suck up the product under satisfactory conditions. Such an installation cannot therefore be suitable for products having too high a viscosity.

L'invention a essentiellement pour but de remédier aux insuffisances des installations connues, en proposant un agencement qui permette de forcer le produit à pénétrer dans la pompe Moineau même lorsque ledit produit possède une viscosité très élevée, qui soit simple et peu coûteux à mettre en oeuvre, qui ne soit pas encombrant, qui éventuellement puisse être mis en place dans des installations déjà existantes et qui évite à coup sûr la formation d'une voûte.The object of the invention is essentially to remedy the shortcomings of known installations, by proposing an arrangement which makes it possible to force the product to enter the Moineau pump even when said product has a very high viscosity, which is simple and inexpensive to put into operation. work, which is not bulky, which can possibly be set up in already existing installations and which certainly avoids the formation of an arch.

Conformément à l'invention, on prévoit de faire comprendre à l'installation, d'une part, une seconde vis d'Archimède ayant un pas d'enroulement inverse de celui de la première vis d'Archimède susmentionnée, cette seconde vis d'Archimède étant disposée à la base de la trémie de remplissage et s'étendant approximativement parallèlement à la première vis d'Archimède, sensiblement dans le même plan de base que celle-ci et, d'autre part, des moyens d'entraînement pour faire tourner la seconde vis d'Archimède en sens inverse de la première.In accordance with the invention, provision is made to make the installation understand, on the one hand, a second Archimedes screw having a winding pitch opposite to that of the above-mentioned first Archimedes screw, this second screw Archimedes being arranged at the base of the filling hopper and extending approximately parallel to the first Archimedes screw, substantially in the same base plane as the latter and, on the other hand, drive means for making turn the second Archimedes screw in the opposite direction to the first.

On conserve ainsi les avantages procurés par les dispositifs antérieurs (plus grandes dimensions de la base de la trémie, malaxage du produit par deux organes contrarotatifs) et, en outre, on comule les efforts exercés axialement sur le produit par les deux vis d'Archimède de sorte que l'effort résultant est suffisamment important pour forcer le produit à pénétrer dans la pompe Moineau.The advantages obtained by the prior devices are thus preserved (larger dimensions of the base of the hopper, mixing of the product by two counter-rotating members) and, in addition, the forces exerted axially on the product by the two Archimedes screws are counteracted. so that the resulting force is large enough to force the product to enter the sparrow pump.

En outre, la demanderesse a pu constater que les deux vis contrarotatives à pas inverses offraient une capacité de broyage et de malaxage bien supérieure à celle des dispositifs de l'art antérieur, ce qui permet d'utiliser le dispositif de l'invention pour véhiculer des produits se présentant sous forme de blocs, tels que des gâteaux de filtration constitués par des morceaux compacts parallélépipédiques de dimensions importantes.In addition, the Applicant has been able to note that the two counter-rotating screws with reverse pitch offered a grinding and kneading capacity much greater than that of the devices of the prior art, which makes it possible to use the device of the invention to convey products in the form of blocks, such as filter cakes constituted by compact rectangular pieces of large dimensions.

De préférence, la seconde vis d'Archimède tourne en synchronisme avec la première, et les moyens d'entraînement comprennent un accouplement sans glissement, notamment un train d'engrenage, interposé entre les deux vis.Preferably, the second Archimedes screw rotates in synchronism with the first, and the drive means comprise a coupling without sliding, in particular a gear train, interposed between the two screws.

De la sorte, il n'est nécessaire de disposer que d'un seul moteur d'entraînement, ce qui limite d'autant le coût de l'installation.In this way, it is only necessary to have a single drive motor, which limits the cost of installation accordingly.

De l'ensemble des dispositions qui viennent d'être mentionnées, il résulte que l'installation de l'invention peut être réalisée avec des dimensions restreintes, malgré ses possibilités bien supérieures à celles des installations connues.From all of the provisions which have just been mentioned, it follows that the installation of the invention can be carried out with limited dimensions, despite its possibilities much greater than those of known installations.

Ainsi, on peut parfaitement envisager de réaliser sur ce modèle des installations neuves, mais aussi de modifier et compléter des installations déjà existantes sans qu'il soit nécessaire de disposer à cet effet d'un espace libre beaucoup plus grand.Thus, it is perfectly possible to envisage making new installations on this model, but also to modify and supplement already existing installations without the need for much larger free space for this purpose.

On sait que l'axe du rotor d'une pompe Moineau tourne de façon excentrée. De ce fait, l'axe de la première vis d'Archimède décrit, en cours de rotation, un cône de révolution ayant pour sommet son raccord à l'axe du moteur d'entraînement et s'appuyant sur le cercle décrit par l'axe du rotor de la pompe Moineau. Toutefois, compte tenu des valeurs relatives du diamètre de rotor de la pompe Moineau et de la longueur de la première vis d'Archimède, l'angle d'ouverture de ce cône est très faible.We know that the axis of the rotor of a pump Sparrow rotates eccentrically. Therefore, the axis of the first Archimedes screw describes, in the course of rotation, a cone of revolution having its apex its connection to the axis of the drive motor and resting on the circle described by the axis of the Moineau pump rotor. However, taking into account the relative values of the rotor diameter of the Moineau pump and the length of the first Archimedes screw, the opening angle of this cone is very small.

De ce fait, tout en restant approximativement dans les conditions ci-dessus mentionnées, il est avantageux que la seconde vis d'Archimède possède un axe fixe afin de simplifier l'agencement de l'installation.Therefore, while remaining approximately under the conditions mentioned above, it is advantageous that the second Archimedes screw has a fixed axis in order to simplify the arrangement of the installation.

Une autre faculté particulièrement intéressante est liée à la poussée importante exercée sur le produit par les deux vis d'Archimède contrarotatives. Comme cette poussée est en fait supérieure à ce a qui est strictement nécessaire pour faire pénétrer le produit dans l'embouchure de la pompe, il est tout à fait possible d'envisager d'alimenter simultanément deux pompes Moineau, la seconde pompe possédant un rotor approximativement coaxial à la seconde vis d'Archimède. Bien entendu, l'axe de cette dernière ne peut plus être fixe et, en raison de l'accouplement sans glissement des deux vis d'Archimède, les deux rotors des pompes tournent également en synchronisme.Another particularly interesting faculty is linked to the significant thrust exerted on the product by the two counter-rotating Archimedes screws. As this thrust is in fact greater than what is strictly necessary to make the product penetrate into the mouth of the pump, it is quite possible to envisage simultaneously feeding two Moineau pumps, the second pump having a rotor approximately coaxial with the second Archimedes screw. Of course, the axis of the latter can no longer be fixed and, due to the coupling without sliding of the two Archimedes screws, the two pump rotors also rotate in synchronism.

Ainsi, grâce à cet agencement très simple de l'alimentation en produit, il est possible de pratiquement doubler le débit de produit traité par l'installation.Thus, thanks to this very simple arrangement of the product supply, it is possible to practically double the flow rate of product treated by the installation.

D'une façon avantageuse, des accouplements à la Cardan ou analogues sont prévus aux deux extrémités de la ou des vis d'Archimède, pour l'accouplement au rotor de la pompe correspondante, à une extrémité, et l'accouplement à un arbre d'entraînement correspondant, à l'autre extrémité. Une telle disposition permet de s'affranchir des dispositifs de transmission coûteux, fragiles et encombrants qui sont utilisés dans certaines installations connues dans lesquelles l'axe de la vis d'Archimède couplée au rotor de la pompe Moineau reste fixe.Advantageously, Cardan couplings or the like are provided at the two ends of the Archimedes screw (s), for coupling to the rotor of the corresponding pump, at one end, and coupling to a shaft d corresponding drive at the other end. Such an arrangement makes it possible to dispense with expensive, fragile and bulky transmission devices which are used in certain known installations in which the axis of the Archimedes screw coupled to the rotor of the Moineau pump remains fixed.

Dans ce cas, on peut prévoir que les deux vis d'Archimède sont axialement décalées l'une par rapport à l'autre et que la distance séparant leurs axes est inférieure à leur diamètre. Ainsi, les deux vis hélicoïdales, considérées en projection axiale, sont imbriquées l'une dans l'autre, ce qui contribue à augmenter encore la poussée exercée sur le produit pâteux pour le faire pénétrer dans la pompe.In this case, provision can be made for the two Archimedes' screws to be axially offset with respect to each other and for the distance separating their axes to be less than their diameter. Thus, the two helical screws, considered in axial projection, are nested one inside the other, which contributes to further increase the thrust exerted on the pasty product to make it penetrate into the pump.

On peut encore augmenter cette poussée en réduisant la dimension transversale du passage offert au produit, vers l'extrémité des vis d'Archimède. Ainsi on prévoit que les parties d'extrémité des vis d'Archimède qui sont proches de la pompe Moineau sont entourées d'un carter commun qui épouse au plus près le comtour extérieur des deux vis d'Archimède, ledit carter ayant une longueur axiale au moins égale à un pas d'hélice.This thrust can be further increased by reducing the transverse dimension of the passage offered to the product, towards the end of the Archimedes screws. Thus, it is expected that the end parts of the Archimedes screws which are close to the Moineau pump are surrounded by a common casing which closely matches the outside comtour of the two Archimedes screws, said casing having an axial length at less equal to one propeller pitch.

Grâce à la poussée accrue et au grand débit résultant de l'utilisation de deux vis, il se crée un retour du produit à la base de la trémie sous forme d'un rouleau qui s'élève au-dessus des deux vis et qui empêche la formation d'une voûte.Thanks to the increased thrust and the high flow rate resulting from the use of two screws, a return of the product is created at the base of the hopper in the form of a roller which rises above the two screws and which prevents the formation of a vault.

L'invention sera mieux comprise à la lecture de la description qui suit de certains modes de réalisation, donnés à titre d'exemples illustratifs, mais nullement limitatifs. Dans cette description, on se réfère aux dessins annexés dans lesquels:

  • - la figure 1 est une vue de dessus, avec couple partielle, montrant de façon schématique une installation agencée conformément à l'invention,
  • - la figure 2 est une vue schématique de côté de l'installation de la figure 1,
  • - et la figure 3 est une vue schématique de dessus, avec coupe partielle, d'un autre mode de réalisation de l'installation de l'invention.
The invention will be better understood on reading the following description of certain embodiments, given by way of illustrative examples, but in no way limiting. In this description, reference is made to the appended drawings in which:
  • FIG. 1 is a top view, with partial torque, schematically showing an installation arranged in accordance with the invention,
  • FIG. 2 is a schematic side view of the installation of FIG. 1,
  • - And Figure 3 is a schematic top view, with partial section, of another embodiment of the installation of the invention.

En se référant tout d'abord aux figures 1 et 2, l'installation servant au transport de produits ayant une grande viscosité comprend une pompe Moineau 1 dont le rotor 2 est accouplé en rotation à une extrémité d'une vis d'Archi- mède 3 et est approximativement coaxial à ladite vis. L'autre extrémité de la vis d'Archi- mède 3 est accouplée en rotation à un arbre muni d'un système de butées axiales 4 et relié, par l'intermédiaire d'un flasque d'accouplement 5, à un moteur d'entraînement (non représenté).Referring first to Figures 1 and 2, the installation for transporting products having a high viscosity comprises a sparrow pump 1 whose rotor 2 is rotatably coupled to one end of an Archimedean screw 3 and is approximately coaxial with said screw. The other end of the Archimedes screw 3 is coupled in rotation to a shaft provided with a system of axial stops 4 and connected, by means of a coupling flange 5, to a motor of training (not shown).

La vis d'Archimède 3 est en outre surmontée d'une trémie 6 pour le produit à transporter.Archimedes' screw 3 is further surmounted by a hopper 6 for the product to be transported.

Conformément à l'invention, on prévoit une seconde vis d'Archimède 7 qui possède un pas d'enroulement inverse de celui de la vis 3 et qui s'étend à peu près parallèlement à la première vis 3, et les axes des vis 3 et 7 définissent un plan (ou plan de base) qui est approximativement parallèle au plan de l'ouverture de base de la trémie 6. Les deux vis 3 et possèdent respectivement des hélices dont le pas est de même valeur et de même diamètre, et elles sont en- traînnées en synchronisme en sens inverse l'une de l'autre (vis contrarotatives). Dans ce but, les arbres des vis 3 et 7 sont accouplés sans glissement, par deux engrenages 8, 9 identiques, calés directement sur leurs arbres respectifs et engrenant directement l'un avec l'autre.In accordance with the invention, a second Archimedes screw 7 is provided which has a winding pitch opposite to that of the screw 3 and which extends approximately parallel to the first screw 3, and the axes of the screws 3 and 7 define a plane (or base plane) which is approximately parallel to the plane of the base opening of the hopper 6. The two screws 3 and have propellers respectively whose pitch is of the same value and of the same diameter, and they are driven in synchronism in opposite directions to each other (counter-rotating screws). For this purpose, the shafts of the screws 3 and 7 are coupled without sliding, by two identical gears 8, 9, wedged directly on their respective shafts and meshing directly with each other.

Comme, en cours de fonctionnement, l'axe du rotor 2 de la pompe Moineau 1 tourne de façon excentrée, l'axe de la vis d'Archimède 3 décrit un cône ayant pour sommet sa jonction avec l'arbre moteur d'entraînement 10 et s'appuyant sur le cercle décrit par l'axe du rotor de la pompe. On prévoit donc deux accouplements à la Cardan 11 pour relier la vis d'Archimède 3 respectivement au rotor 2 et à l'arbre moteur 10.As, during operation, the axis of the rotor 2 of the Moineau pump 1 rotates eccentrically, the axis of the Archimedes screw 3 describes a cone whose summit is its junction with the drive motor shaft 10 and based on the circle described by the axis of the pump rotor. Two couplings are therefore provided to the Cardan joint 11 to connect the Archimedes screw 3 respectively to the rotor 2 and to the motor shaft 10.

Par contre, afin de ne pas compliquer la structure de l'installation, la seconde vis d'Archimède 7 tourne autour d'un axe fixe et son arbre tourillonne dans des paliers fixes 12 solidaires du bâti de l'installation.On the other hand, in order not to complicate the structure of the installation, the second Archimedes screw 7 rotates around a fixed axis and its shaft spins in fixed bearings 12 integral with the frame of the installation.

De toute manière, compte tenu des dimensions relatives du diamètre du rotor 2 et de la longueur des vis d'Archimède 3, l'ouverture du cône parcouru par l'axe de la vis 3 est très faible. Le défaut de parallélisme entre les gis d'Archimède 3 et 7 est donc minime et n'est en tout cas pas susceptible d'affecter l'efficacité de l'entraînement du produit vers l'entrée de la pompe Moineau 1.In any case, taking into account the relative dimensions of the diameter of the rotor 2 and the length of the Archimedes screws 3, the opening of the cone traversed by the axis of the screw 3 is very small. The lack of parallelism between the gis of Archimedes 3 and 7 is therefore minimal and is in any case not likely to affect the efficiency of the drive of the product towards the inlet of the Moineau 1 pump.

Les dispositions de l'installation de l'invention sont particulièrement intéressantes, car la relativement grande ouverture de base de la trémie 6, nécessaire pour l'alimentation des deux vis d'Archimède 3 et 7, évite l'apparition du phénomène de voûte mentionné précédemment. En outre, les deux vis contrarotatives exercent sur le produit pâteux respectivement deux forces axiales dont la résultante est importante: le produit est donc entraîne régulièrement jusqu'à l'embouchure de la pompe Moineau 1.The arrangements of the installation of the invention are particularly interesting, because the relatively large base opening of the hopper 6, necessary for the supply of the two Archimedes screws 3 and 7, prevents the appearance of the aforementioned arch phenomenon. previously. In addition, the two counter-rotating screws exert respectively on the pasty product two axial forces, the result of which is significant: the product is therefore regularly driven up to the mouth of the Moineau 1 pump.

Par ailleurs, la contrarotation des vis d'Archi- mède 3 et 7 engendre un malaxage du produit qui, en l'empêchant de se figer, le maintient dans un état facilitant, autant que faire se peut, son écoulement.Furthermore, the counter-rotation of the Archimedes 3 and 7 screws causes the product to knead, which, by preventing it from freezing, keeps it in a state which facilitates, as much as possible, its flow.

Enfin, on notera que les axes du rotor de la pompe Moineau, des deux vis d'Archimède, des arbres d'entraînement et du moteur sont situés dans le même plan de base et que, de ce fait, le trémie peut être disposée relativement bas par rapport à ce plan de base. L'ensemble de l'installation peut donc être réalisé sous une forme très compacte ou, tout au moins, sans accroissement de dimensions par rapport aux dimensions d'une installation à une seule vis d'Archi- mède. Cet avantage est particulièrement intéressant car il autorise le remplacement d'une installation antérieure par une installation conforme à l'invention sans qu'il soit nécessaire de prévoir un espace libre accru.Finally, it will be noted that the axes of the rotor of the Moineau pump, of the two Archimedes screws, of the drive shafts and of the motor are located in the same basic plane and that, as a result, the hopper can be arranged relatively low compared to this basic plan. The entire installation can therefore be produced in a very compact form or, at least, without any increase in dimensions compared to the dimensions of an installation with a single Archimedean screw. This advantage is particularly interesting because it allows the replacement of a previous installation by an installation according to the invention without the need to provide increased free space.

Encore un autre avantage réside dans l'importance de la force résultante exercée par les deux vis contrarotatives 3 et 7. Il est alors possible d'alimenter simultanément une seconde compe Moineau 13, comme représenté à la figure 3 (sur laquelle les organes identiques à ceux des figures 1 et 2 sont désignés par les mêmes références numériques).Yet another advantage lies in the importance of the resulting force exerted by the two counter-rotating screws 3 and 7. It is then possible to simultaneously feed a second sparrow compe 13, as shown in FIG. 3 (on which the members identical to those of Figures 1 and 2 are designated by the same reference numerals).

La seconde pompe Moineau 13 est parallèle à la première 1 et l'axe de son rotor 14 est approximativement aligné avec celui de la seconde vis d'Archimède 7.The second Moineau pump 13 is parallel to the first 1 and the axis of its rotor 14 is approximately aligned with that of the second Archimedes screw 7.

Bien entendu, dans ce cas, la seconde vis d'Archimède 7 ne peut plus avoir un axe fixe et doit, comme la vis 3, être reliée, par des accouplements à la Cardan 15, au rotor 14 de la pompe 13 et l'arbre d'entraînement 16 sur lequel est flasque l'engrenage d'accouplement contrarotatif 9, un système de butées axiales 17 étant en outre prévu de façon analogue au système 4.Of course, in this case, the second Archimedes screw 7 can no longer have a fixed axis and must, like screw 3, be connected, by couplings to the Cardan joint 15, to the rotor 14 of the pump 13 and the drive shaft 16 on which the counter-rotating coupling gear 9 is flanged, a system of axial stops 17 being also provided in a manner analogous to system 4.

Une tèlle installation permet pratiquement de doubler le débit de produit pâteux, par comparaison avec les performances de l'installation représentée aux figures 1 et 2, sans pour autant que l'encombrement soit très supérieur.Such an installation practically doubles the flow rate of pasty product, in comparison with the performance of the installation shown in FIGS. 1 and 2, without however taking up much more space.

Pour pouvoir encore augmenter la poussée exercée sur le produit pour le faire pénétrer dans la pompe, et donc augmenter encore le rendement de l'installation, on prévoit que les axes des deux vis d'Archimède 3 et 7 sont écartés l'un de l'autre d'une distance inférieure à leur diamétre, les deux vis étant décalées axialement d'environ un demi-pas l'une par rapport à l'autre. Autrement dit, les contours extérieurs des deux vis, en projection axiale, se recouvrent partiellement, comme représenté en 18 sur les figures 1 et 3.To be able to further increase the thrust exerted on the product to make it penetrate into the pump, and therefore further increase the efficiency of the installation, provision is made for the axes of the two Archimedes screws 3 and 7 to be separated from one another. 'another by a distance less than their diameter, the two screws being offset axially by about half a step relative to each other. In other words, the external contours of the two screws, in axial projection, partially overlap, as shown at 18 in FIGS. 1 and 3.

En outre on prévoit que la partie du carter 19 qui entoure les deux vis dans la zone de sortie de celles-ci (c'est-à-dire dans leur zone d'extrémité proche de la pompe Moineau) épouse au plus près le contenu extérieur des deux vis et s'étende sur une longueur axiale qui soit égale à au moins un pas d'hélice des vis.In addition, it is expected that the part of the casing 19 which surrounds the two screws in the outlet zone of these (that is to say in their end zone close to the Moineau pump) closely matches the content. outside of the two screws and extends over an axial length which is equal to at least one helix pitch of the screws.

Comme cela so conçoit aisément, on peut envisager de multiplier les pompes Moineau et les vis d'Archimède correspondantes, deux vis voisines étant contrarotatives, et leur rotation en synchronisme s'effectuant, à partir d'un même moteur d'entraînement, par des engrenages successifs.As is easily conceivable, one can envisage multiplying the Moineau pumps and the corresponding Archimedes screws, two neighboring screws being counter-rotating, and their rotation in synchronism being effected, starting from the same drive motor, by successive gears.

Claims (8)

1. An installation for transporting pasty products having a high viscosity comprising:
- a filling hopper (6) for receiving the product to be transported,
- An Archimedes screw (3) extending at the base of the hopper;
- a Moineau pump (1) for shifting the product to be transported, which product is forced to the intake of the pump by the Archimedes screw, the Archimedes screw (3) and the rotor (2) of the pump being approximately coaxial and being rotatively coupled to one another,
- and drive means for rotatably driving the Archimedes screw (3) and the rotor (2) of the pump (1),

characterized in that it comprises, on the one hand, a second Archimedes screw (7) having a winding pitch the reverse of that of the first above-mentioned Archimedes screw, this second Archimedes screw (7) being disposed at the base of the filling hopper (6) and extending approximately parallel to the first Archimedes screw (3), substantially in the same base plane as this latter and, on the other hand, drive means for causing the second Archimedes screw (7) to rotate in the opposite direction to the first one.
2. The installation as claimed in claim 1, characterized in that the second Archimedes screw (3) rotates in synchronism with the first one and in that the drive means (8, 9) comprise a non-slip coupling, in particular a gear train, inserted between the two screws.
3. The installation as claimed in claim 1 or 2, characterized in that the second Archimedes screw (7) has a fixed axis.
4. The installation as claimed in claim 1 or 2, characterized in that a second Moineau pump (13) is provided whose rotor (14) is approximately coaxial to the second Archimedes screw (7) and coupled in rotation therewith.
5. The installation as claimed in any one of claims 1 to 4, characterized in that universal couplings (11, 15) or similar are provided at both ends of the Archimedes screw(s), for coupling to the rotor of the corresponding pump, at one end, and for coupling to a corresponding drive shaft, at the other end.
6. The installation as claimed in any one of claims 1 to 5, characterized in that the two Archimedes screws have the same diameter and the same helical pitch.
7. The installation as claimed in claim 6, characterized in that the two Archimedes screws are axially offset with respect to each other and in that the distance separating their axes is less than their diameter.
8. The installation as claimed in any one of claims 1 to 7, characterized in that the end parts of the Archimedes screws which are adjacent the Moineau pump are surrounded by a common casing (19) which takes on substantially the shape of the outer contour of the two Archimedes screws, said casing having an axial length at least equal to one helical pitch.
EP19810400296 1980-03-13 1981-02-26 Single screw pump installation for the transport of pasty products possessing a high viscosity Expired EP0037294B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8005663A FR2478222A1 (en) 1980-03-13 1980-03-13 IMPROVEMENTS TO FACILITIES FOR THE TRANSPORT OF PASTE PRODUCTS WITH HIGH VISCOSITY
FR8005663 1980-03-13

Publications (3)

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EP0037294A2 EP0037294A2 (en) 1981-10-07
EP0037294A3 EP0037294A3 (en) 1981-10-14
EP0037294B1 true EP0037294B1 (en) 1983-07-27

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EP19810400296 Expired EP0037294B1 (en) 1980-03-13 1981-02-26 Single screw pump installation for the transport of pasty products possessing a high viscosity

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EP (1) EP0037294B1 (en)
DE (1) DE3160674D1 (en)
FR (1) FR2478222A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184938A2 (en) * 1984-12-12 1986-06-18 Robert A. Barr Wave pump assembly
FR2616169A1 (en) * 1987-06-03 1988-12-09 Boehm Patrick Method for transporting and applying moist granular materials of low density which do not flow naturally and device for the implementation of this method
US5122038A (en) * 1990-02-13 1992-06-16 Inco Limited High density grout pump
US5174725A (en) * 1991-12-02 1992-12-29 Corning Incorporated Gear pump having multiple pairs of gears
US5636972A (en) * 1993-04-26 1997-06-10 Carbotech Device for extrusion of two component synthetic resins
WO2002018792A2 (en) * 2000-09-01 2002-03-07 Moyno, Inc. Progressing cavity pump
WO2003086912A1 (en) * 2002-04-08 2003-10-23 Fibrecycle Pty Ltd Particulate matter conveyor
CN102530515A (en) * 2012-02-27 2012-07-04 山东忠诚橡胶有限公司 Automatic cleaning device and cleaning method for double-helix conveying anti-sticking roller

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
US5312224A (en) * 1993-03-12 1994-05-17 International Business Machines Corporation Conical logarithmic spiral viscosity pump
NL1004549C2 (en) * 1996-11-18 1998-05-19 Hama Nederland B V Mobile pumping device and coupling.
FR2855162A1 (en) * 2003-05-20 2004-11-26 Medelco Powdered material feeder e.g. for pharmaceutical tablet maker has two parallel augers turning in opposite directions and at the same speed
CN104832189A (en) * 2015-04-14 2015-08-12 安徽岚岛重工科技股份有限公司 Automatic propelling and discharging apparatus of cement spraying machine
CN106276090B (en) * 2016-10-13 2018-09-28 何贤强 A kind of Food stuff transmitting device
CN110552879B (en) * 2019-09-29 2024-05-24 陈行 Four-screw pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331585C3 (en) * 1973-06-20 1979-12-13 Netzsch-Mohnopumpen Gmbh, 8672 Selb Eccentric screw pump

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0184938A2 (en) * 1984-12-12 1986-06-18 Robert A. Barr Wave pump assembly
EP0184938A3 (en) * 1984-12-12 1988-01-07 Robert A. Barr Wave pump assembly
FR2616169A1 (en) * 1987-06-03 1988-12-09 Boehm Patrick Method for transporting and applying moist granular materials of low density which do not flow naturally and device for the implementation of this method
US5122038A (en) * 1990-02-13 1992-06-16 Inco Limited High density grout pump
US5174725A (en) * 1991-12-02 1992-12-29 Corning Incorporated Gear pump having multiple pairs of gears
US5636972A (en) * 1993-04-26 1997-06-10 Carbotech Device for extrusion of two component synthetic resins
WO2002018792A2 (en) * 2000-09-01 2002-03-07 Moyno, Inc. Progressing cavity pump
WO2003086912A1 (en) * 2002-04-08 2003-10-23 Fibrecycle Pty Ltd Particulate matter conveyor
CN102530515A (en) * 2012-02-27 2012-07-04 山东忠诚橡胶有限公司 Automatic cleaning device and cleaning method for double-helix conveying anti-sticking roller
CN102530515B (en) * 2012-02-27 2015-05-13 山东忠诚橡胶有限公司 Automatic cleaning device and cleaning method for double-helix conveying anti-sticking roller

Also Published As

Publication number Publication date
EP0037294A3 (en) 1981-10-14
EP0037294A2 (en) 1981-10-07
FR2478222B1 (en) 1983-07-22
FR2478222A1 (en) 1981-09-18
DE3160674D1 (en) 1983-09-01

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