EP0344059B1 - Rotary gear apparatus for the circulation of a fluid - Google Patents

Rotary gear apparatus for the circulation of a fluid Download PDF

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Publication number
EP0344059B1
EP0344059B1 EP89401408A EP89401408A EP0344059B1 EP 0344059 B1 EP0344059 B1 EP 0344059B1 EP 89401408 A EP89401408 A EP 89401408A EP 89401408 A EP89401408 A EP 89401408A EP 0344059 B1 EP0344059 B1 EP 0344059B1
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EP
European Patent Office
Prior art keywords
axis
gear
longitudinal elements
crown wheels
rotary device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89401408A
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German (de)
French (fr)
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EP0344059A1 (en
Inventor
Sylvain Janssen
Claude Fouinaud
Gérard Lagarde
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Tokheim Services France SAS
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Schlumberger SA
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Publication date
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Publication of EP0344059A1 publication Critical patent/EP0344059A1/en
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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
    • F04C2/101—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 a crescent-shaped filler element, located between the inner and outer intermeshing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels

Definitions

  • the present invention relates to a rotating device with gears for the circulation of a liquid.
  • the invention relates to a rotating device of the gear type which can operate either as a pump for circulating a liquid, in particular a hydrocarbon, or as a flow meter for measuring a flow rate of liquid in circulation, in particular a hydrocarbon. .
  • Gear pumps in particular for the distribution of hydrocarbons having the characteristics of the preamble of claim 1 (GB-A-270000), are well known.
  • Figure 1 shows such a pump. It comprises a pump body 10 provided with an intake pipe 12 and a discharge pipe 14 for the liquid.
  • An internal gear 16 is pivotally mounted in the pump body 10 around a first axis XX ′. Inside the gear 16 there is a gear 18, for example driving, with external teeth which is rotated about an axis YY ′ parallel to the axis XX ′.
  • the gear 18 partially meshes with the gear 16 due to its eccentricity.
  • the gear 16 has openings 22, corresponding to the tooth bottoms, which allow the liquid to pass from the suction to the internal zone to the gear 16 and from said internal zone to the discharge. Under the effect of the relative rotational movements of the gears 16 and 18, the liquid is sucked from the suction line 12 to the area internal to the gear 16 and then discharged from this internal area to the delivery line 14.
  • An object of the present invention is to provide a rotating gear device, in particular a gear pump of the aforementioned type, of which at least the external gear can be produced by molding or by sintering.
  • the rotating device for the circulation of liquid which comprises a housing provided with an inlet opening and an outlet opening, and in said housing a first rotating member provided with a rotation axis and an external toothing, and a second rotating member surrounding said first toothing and guided in rotation about a second axis parallel to the first, said second member having an internal toothing to cooperate with a part of said external toothing and orifices to allow said liquid to penetrate into said second member, said second member being constituted by two circular rings mounted in said casing in two planes perpendicular to said first axis, and by a plurality of longitudinal elements mounted between said rings in the direction X, X ′, having in cross section the shape of a gear tooth, characterized in that said crowns have on their periphery enc regularly distributed sockets to receive the ends of said longitudinal elements, said longitudinal elements not being integral with said crowns.
  • the pump comprises a body formed by a main casing 30 closed by a flange 32.
  • the casing 30 defines a cylindrical cavity 34 of axis XX ′. In the cavity 34 open a suction line 36 visible in Figure 2 and a discharge line not shown.
  • the wall 38 of the casing 30 perpendicular to the axis XX ′ has a bearing - stop 40 whose axis YY ′ is offset with respect to the axis XX ′ as shown in FIG. 2.
  • the flange 32 the periphery of which 42 can be fixed by any suitable means to the edge 44 casing 30 defines a bearing 46 the axis of which coincides with the axis YY ′ when the flange 32 is mounted on the casing 30.
  • the flange 32 has on its internal face an extension 48 which defines the part in the form of a half-moon 20 of the Figure 1.
  • the outer face 50 of the extension 48 is a portion of cylinder of revolution with axis XX ′ while its inner face 52 is a portion of cylinder of revolution with axis YY ′.
  • the cavity 34 has a generally cylindrical shape limited by the side wall 39 and by two end walls 38 and 41 (flange 32).
  • the external gear referenced 100 comprises two circular end rings 102 and 104 and a plurality of longitudinal elements 106, all identical, which are arranged along the axis XX ′ of the external gear 100.
  • Each ring 102 or 104 has on its periphery notches 108 in number equal to the name of the longitudinal elements 106.
  • the notches 108 have a depth less than the thickness of the crown 102 or 104 so that the residual thickness serves as an axial stop in the direction XX ′
  • the notches 108 are machined to receive the ends of the longitudinal elements 106 with a slight play as shown in Figures 3a and 3b.
  • the longitudinal elements have, in cross section, the shape of a gear tooth.
  • the pump also includes an internal gear 80.
  • the gear 80 comprises a shaft 82 on which a pinion 84 with external teeth is fixed.
  • the pinion 84 has for example seven teeth which are cut to be able to mesh with the teeth of the external gear formed by the longitudinal elements 106.
  • the shaft 82 comprises a first end 86 which forms a bearing for the bearing 40 of the pump body and , on the other side of the pinion 82, a bearing 88 for the bearing 46 of the flange 32 and an end 90 for fixing to a drive member.
  • the structure of the external gear 100 is exactly reconstructed.
  • the longitudinal elements 106 are held axially by the crowns circular 102 and 104 arranged in planes perpendicular to the axis XX ′ and they are held radially by the cylindrical side wall of this same cavity 36.
  • the crowns 102 and 104 are held in place by the side wall 39 and by the end walls 38 and 41 of the cavity 36.
  • the assembly has a slight clearance to absorb the effects of differential thermal expansion.
  • the various parts forming the external gear 100 can easily be produced by molding or by sintering (sintered steel).
  • the longitudinal elements 106 can be advantageously cut from a Delrin rod having a suitable cross section.
  • the longitudinal elements 106 and the notches 108 are limited by portions of cylindrical surfaces of revolution about the same axis, these axes being parallel to the axis X, X ′.
  • each longitudinal element guided by the two notches 108 has a reduced possibility of pivoting about its axis when it meshes with a tooth of the internal gear.
  • the notches 108 formed in the crowns 102 and 104 can be the entire thickness of these.
  • the longitudinal elements 106 are held longitudinally by the internal walls of the casing and of the flange perpendicular to the axis XX ′.

Description

La présente invention a pour objet un dispositif tournant à engrenages pour la circulation d'un liquide.The present invention relates to a rotating device with gears for the circulation of a liquid.

De façon plus précise l'invention concerne un dispositif tournant du type à engrenages pouvant fonctionner soit comme une pompe pour la mise en circulation d'un liquide, notamment un hydrocarbure soit comme un débitmètre pour mesurer un débit de liquide en circulation, notamment un hydrocarbure.More specifically, the invention relates to a rotating device of the gear type which can operate either as a pump for circulating a liquid, in particular a hydrocarbon, or as a flow meter for measuring a flow rate of liquid in circulation, in particular a hydrocarbon. .

Les pompes à engrenages, notamment pour la distribution d'hydrocarbures présentant les caractéristiques du préambule de la revendication 1 (GB-A-270000), sont bien connues. La figure 1 représente une telle pompe. Elle comprend un corps de pompe 10 muni d'une conduite d'admission 12 et d'une conduite de refoulement 14 du liquide. Un engrenage à denture interne 16 est monté à pivotement dans le corps de pompe 10 autour d'un premier axe XX′. A l'intérieur de l'engrenage 16 on trouve un engrenage 18, par exemple menant, à denture externe qui est entrainé en rotation autour d'un axe YY′ parallèle à l'axe XX′. L'engrenage 18 engrêne partiellement avec l'engrenage 16 du fait de son excentrement. Une pièce 20, dont les génératrices sont parallèles aux axes XX′ et YY′ sépare sur une partie de leur circonférence, les engrenages 16 et 18. L'engrenage 16 comporte des ouvertures 22, correspondant aux fonds de dent, qui permettent au liquide de passer de l'aspiration à la zone interne à l'engrenage 16 et de ladite zone interne vers le refoulement. Sous l'effet des mouvements relatifs de rotation des engrenages 16 et 18 du liquide est aspiré de la conduite d'aspiration 12 vers la zone interne à l'engrenage 16 puis refoulé de cette zone interne vers la conduite de refoulement 14.Gear pumps, in particular for the distribution of hydrocarbons having the characteristics of the preamble of claim 1 (GB-A-270000), are well known. Figure 1 shows such a pump. It comprises a pump body 10 provided with an intake pipe 12 and a discharge pipe 14 for the liquid. An internal gear 16 is pivotally mounted in the pump body 10 around a first axis XX ′. Inside the gear 16 there is a gear 18, for example driving, with external teeth which is rotated about an axis YY ′ parallel to the axis XX ′. The gear 18 partially meshes with the gear 16 due to its eccentricity. A part 20, whose generatrices are parallel to the axes XX ′ and YY ′ separates over a part of their circumference, the gears 16 and 18. The gear 16 has openings 22, corresponding to the tooth bottoms, which allow the liquid to pass from the suction to the internal zone to the gear 16 and from said internal zone to the discharge. Under the effect of the relative rotational movements of the gears 16 and 18, the liquid is sucked from the suction line 12 to the area internal to the gear 16 and then discharged from this internal area to the delivery line 14.

Le principe de telles pompes est bien connu mais leur fabrication est délicate et onéreuse. En particulier la fabrication de l'engrenage externe à denture interne, qui doit permettre le montage de l'engrenage interne à denture externe, est très onéreuse. En effet il est impossible de réaliser intégralement cette pièce qui a une forme de cage d'écureuil par moulage ou par frittage.The principle of such pumps is well known, but their manufacture is delicate and expensive. In particular, the manufacture of the external gear with internal teeth, which must allow the mounting of the internal gear with external teeth, is very expensive. In fact, it is impossible to produce this part in its entirety, which has the shape of a squirrel cage by molding or by sintering.

Un objet de la présente invention est de fournir un dispositif tournant à engrenages, notamment une pompe à engrenages du type précité, dont au moins l'engrenage externe peut être réalisé par moulage ou par frittage.An object of the present invention is to provide a rotating gear device, in particular a gear pump of the aforementioned type, of which at least the external gear can be produced by molding or by sintering.

Pour atteindre ce but le dispositif tournant pour la circulation de liquide qui comprend un carter muni d'une ouverture d'entrée et d'une ouverture de sortie, et dans ledit carter un premier organe tournant muni d'un axe de rotation et d'une denture externe, et un deuxième organe tournant entourant ladite première denture et guidé en rotation autour d'un deuxième axe parallèle au premier, ledit deuxième organe comportant une denture interne pour coopérer avec une partie de ladite denture externe et des orifices pour permettre audit liquide de pénétrer dans ledit deuxième organe, ledit deuxième organe étant constitué par deux couronnes circulaires montées dans ledit carter selon deux plans perpendiculaires audit premier axe, et par une pluralité d'éléments longitudinaux montés entre lesdites couronnes selon la direction X, X′, ayant en section droite la forme d'une dent d'engrenage, caractérisé en ce que lesdites couronnes présentent sur leur périphérie des encoches régulièrement réparties pour recevoir les extrémités desdits éléments longitudinaux, lesdits éléments longitudinaux n'étant pas solidaires desdites couronnes.To achieve this goal the rotating device for the circulation of liquid which comprises a housing provided with an inlet opening and an outlet opening, and in said housing a first rotating member provided with a rotation axis and an external toothing, and a second rotating member surrounding said first toothing and guided in rotation about a second axis parallel to the first, said second member having an internal toothing to cooperate with a part of said external toothing and orifices to allow said liquid to penetrate into said second member, said second member being constituted by two circular rings mounted in said casing in two planes perpendicular to said first axis, and by a plurality of longitudinal elements mounted between said rings in the direction X, X ′, having in cross section the shape of a gear tooth, characterized in that said crowns have on their periphery enc regularly distributed sockets to receive the ends of said longitudinal elements, said longitudinal elements not being integral with said crowns.

L'invention sera mieux comprise à la lecture de la description qui suit de plusieurs modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. La description se réfère au dessin annexé sur lequel:

  • La figure 1, déjà décrite, montre en coupe et en élévation une pompe à engrenages de type connu;
  • La figure 2 est une vue éclatée d'un mode de réalisation de la pompe à engrenages;
  • La figure 3a est une vue partielle de face d'une partie des éléments formant l'engrenage externe de la pompe;
  • La figure 3b est une vue partielle en coupe verticale de l'élément d'engrenage de la figure 3a;
  • La figure 4a est une vue en coupe axiale de l'engrenage interne de la pompe à engrenage; et
  • La figure 4b est une vue de gauche de l'engrenage interne de la figure 4a.
The invention will be better understood on reading the following description of several embodiments of the invention given by way of non-limiting examples. The description refers to the attached drawing in which:
  • Figure 1, already described, shows in section and in elevation a gear pump of known type;
  • Figure 2 is an exploded view of an embodiment of the gear pump;
  • FIG. 3a is a partial front view of a part of the elements forming the external gear of the pump;
  • Figure 3b is a partial view in vertical section of the gear element of Figure 3a;
  • Figure 4a is an axial sectional view of the internal gear of the gear pump; and
  • Figure 4b is a left view of the internal gear of Figure 4a.

En se référant tout d'abord à la figure 2 on va décrire un mode de réalisation d'une pompe à engrenages selon l'invention.Referring first to Figure 2 we will describe an embodiment of a gear pump according to the invention.

La pompe comprend un corps formé par un carter principal 30 fermé par un flasque 32. Le carter 30 définit une cavité cylindrique 34 d'axe XX′. Dans la cavité 34 débouchent une conduite d'aspiration 36 visible sur la figure 2 et une conduite de refoulement non représentée. La paroi 38 du carter 30 perpendiculaire à l'axe XX′ comporte un palier - butée 40 dont l'axe YY′ est décalé par rapport à l'axe XX′ comme le montre la figure 2.The pump comprises a body formed by a main casing 30 closed by a flange 32. The casing 30 defines a cylindrical cavity 34 of axis XX ′. In the cavity 34 open a suction line 36 visible in Figure 2 and a discharge line not shown. The wall 38 of the casing 30 perpendicular to the axis XX ′ has a bearing - stop 40 whose axis YY ′ is offset with respect to the axis XX ′ as shown in FIG. 2.

Le flasque 32, dont la périphérie 42 peut être fixée par tout moyen convenable sur le bord 44 carter 30 définit un palier 46 dont l'axe est confondu avec l'axe YY′ lorsque le flasque 32 est monté sur le carter 30. Le flasque 32 comporte sur sa face interne une extension 48 qui définit la pièce en forme de demi-lune 20 de la figure 1. La face externe 50 du prolongement 48 est une portion de cylindre de révolution d'axe XX′ alors que sa face interne 52 est une portion de cylindre de révolution d'axe YY′. La cavité 34 a une forme générale cylindrique limitée par la paroi latérale 39 et par deux parois d'extrémité 38 et 41 (flasque 32).The flange 32, the periphery of which 42 can be fixed by any suitable means to the edge 44 casing 30 defines a bearing 46 the axis of which coincides with the axis YY ′ when the flange 32 is mounted on the casing 30. The flange 32 has on its internal face an extension 48 which defines the part in the form of a half-moon 20 of the Figure 1. The outer face 50 of the extension 48 is a portion of cylinder of revolution with axis XX ′ while its inner face 52 is a portion of cylinder of revolution with axis YY ′. The cavity 34 has a generally cylindrical shape limited by the side wall 39 and by two end walls 38 and 41 (flange 32).

A l'intérieur du corps de pompe est monté un engrenage externe 100.Inside the pump body is mounted an external gear 100.

En se référant aux figures 3a et 3b on va décrire un mode de réalisation de l'engrenage externe 100 de la pompe à engrenages selon l'invention. L'engrenage externe référencé 100 comprend deux couronnes circulaires d'extrémité 102 et 104 et une pluralité d'éléments longitudinaux 106, tous identiques, qui sont disposés selon l'axe XX′ de l'engrenage externe 100. Chaque couronne 102 ou 104, comporte sur sa périphérie des encoches 108 en nombre égal au nom des éléments longitudinaux 106. Les encoches 108 ont une profondeur inférieure à l'épaisseur de la couronne 102 ou 104 de telle sorte que l'épaisseur résiduelle sert de butée axiale selon la direction XX′ pour les éléments longitudinaux 106. Il y en a neuf dans l'exemple décrit. Les encoches 108 sont usinées pour recevoir les extrémités des éléments longitudinaux 106 avec un léger jeu comme le montrent les figures 3a et 3b. Les éléments longitudinaux ont, en section droite, la forme d'une dent d'engrenage.Referring to Figures 3a and 3b we will describe an embodiment of the external gear 100 of the gear pump according to the invention. The external gear referenced 100 comprises two circular end rings 102 and 104 and a plurality of longitudinal elements 106, all identical, which are arranged along the axis XX ′ of the external gear 100. Each ring 102 or 104, has on its periphery notches 108 in number equal to the name of the longitudinal elements 106. The notches 108 have a depth less than the thickness of the crown 102 or 104 so that the residual thickness serves as an axial stop in the direction XX ′ For the longitudinal elements 106. There are nine in the example described. The notches 108 are machined to receive the ends of the longitudinal elements 106 with a slight play as shown in Figures 3a and 3b. The longitudinal elements have, in cross section, the shape of a gear tooth.

La pompe comprend également un engrenage interne 80. Comme le montre la figure 4a l'engrenage 80 comprend un arbre 82 sur lequel est fixé un pignon 84 à denture externe. Le pignon 84 a par exemple sept dents qui sont taillées pour pouvoir engrener avec les dents de l'engrenage externe formées par les éléments longitudinaux 106. L'arbre 82 comprend une première extrémité 86 qui forme une portée pour le palier 40 du corps de pompe et, de l'autre côté du pignon 82, une portée 88 pour le palier 46 du flasque 32 et une extrémité 90 de fixation à un organe moteur.The pump also includes an internal gear 80. As shown in FIG. 4a, the gear 80 comprises a shaft 82 on which a pinion 84 with external teeth is fixed. The pinion 84 has for example seven teeth which are cut to be able to mesh with the teeth of the external gear formed by the longitudinal elements 106. The shaft 82 comprises a first end 86 which forms a bearing for the bearing 40 of the pump body and , on the other side of the pinion 82, a bearing 88 for the bearing 46 of the flange 32 and an end 90 for fixing to a drive member.

On comprend qu'en montant successivement dans la cavité 36 du corps de pompe 30 la couronne 104, les éléments longitudinaux 106 et la couronne 102 on reconstitue exactement la structure de l'engrenage externe 100. Les éléments longitudinaux 106 sont maintenus axialement par les couronnes circulaires 102 et 104 disposées dans des plans perpendiculaires à l'axe XX′ et ils sont maintenus radialement par la paroi latérale cylindrique de cette même cavité 36. De même les couronnes 102 et 104 sont maintenues en place par la paroi latérale 39 et par les parois d'extrémité 38 et 41 de la cavité 36. Selon l'axe X, X′ le montage présente un léger jeu pour absorber les effets de dilatation thermique différentielle. Les différentes pièces formant l'engrenage externe 100 peuvent aisément être réalisées par moulage ou par frittage (acier fritté). Cela est vrai surtout pour les couronnes 102 et 104. En ce qui concerne les éléments longitudinaux 106 ils peuvent être avantageusement découpés dans une tige en Delrin ayant une section droite convenable. De préférence les éléments longitudinaux 106 et les encoches 108 sont limités par des portions de surfaces cylindriques de révolution autour d'un même axe, ces axes étant parallèles à l'axe X, X′. Ainsi chaque élément longitudinal guidé par les deux encoches 108, a une possibilité réduite de pivotement autour de son axe lorsqu'il engrène avec une dent de l'engrenage interne.It is understood that by successively mounting in the cavity 36 of the pump body 30 the crown 104, the longitudinal elements 106 and the crown 102 the structure of the external gear 100 is exactly reconstructed. The longitudinal elements 106 are held axially by the crowns circular 102 and 104 arranged in planes perpendicular to the axis XX ′ and they are held radially by the cylindrical side wall of this same cavity 36. Similarly, the crowns 102 and 104 are held in place by the side wall 39 and by the end walls 38 and 41 of the cavity 36. According to the axis X, X ′ the assembly has a slight clearance to absorb the effects of differential thermal expansion. The various parts forming the external gear 100 can easily be produced by molding or by sintering (sintered steel). This is especially true for the crowns 102 and 104. As regards the longitudinal elements 106, they can be advantageously cut from a Delrin rod having a suitable cross section. Preferably the longitudinal elements 106 and the notches 108 are limited by portions of cylindrical surfaces of revolution about the same axis, these axes being parallel to the axis X, X ′. Thus each longitudinal element guided by the two notches 108, has a reduced possibility of pivoting about its axis when it meshes with a tooth of the internal gear.

En variante les encoches 108 ménagées dans les couronnes 102 et 104 peuvent faire toute l'épaisseur de celles-ci. Dans ce cas, après montage des pièces formant l'engrenage externe, les éléments longitudinaux 106 sont maintenus longitudinalement par les parois internes du carter et du flasque perpendiculaires à l'axe XX′.As a variant, the notches 108 formed in the crowns 102 and 104 can be the entire thickness of these. In this case, after mounting of the parts forming the external gear, the longitudinal elements 106 are held longitudinally by the internal walls of the casing and of the flange perpendicular to the axis XX ′.

Dans la description précédente on a considéré qu'il s'agissait d'une pompe à engrenages pour mettre en circulation un liquide, l'arbre 82 de l'engrenage interne étant entrainé en rotation. On comprend cependant que le même appareil peut fonctionner en débitmètre, la rotation de l'arbre 90 étant représentative du débit, le liquide traversant le carter du débitmètre.In the preceding description, it has been considered that it was a gear pump for circulating a liquid, the shaft 82 of the internal gear being driven in rotation. It is understood, however, that the same device can operate as a flow meter, the rotation of the shaft 90 being representative of the flow, the liquid passing through the casing of the flow meter.

Claims (4)

1. A rotary gear device for circulating liquids comprising a housing (30) provided with an inlet aperture (12, 36) and an outlet aperture (14) and, in the said housing, a first rotary device (80) provided with an axis of rotation (Y, Y′) and an external toothing (84), and a second rotary device (100) encircling the said first toothing and guided in rotation about a second axis (XX′) parallel to the said first, the said second device comprising internal toothing for co-operation with a part of the said external toothing and orifices to permit the said liquid to penetrate into the said second device, the said second device (100) being constituted by two circular crown wheels (102 and 104) mounted in the said housing (30) along planes perpendicular to the said first axis (Y, Y′), and by a plurality of longitudinal elements (106) mounted between the said crown wheels along the direction (X, X′), and having in right section the form of a gear tooth, characterised in that the peripheries of the said crown wheels (102, 104) have regularly distributed notches (108) to receive the ends of the said longitudinal elements (106), the said longitudinal elements not being secured with the said crown wheels.
2. A rotary device according to claim 1, characterised in that the said crown wheels (102, 104) are held in place in the said casing (30) by the lateral cylindrical face (39) of the latter and by its end faces (38, 41) perpendicular to the axis X, X′.
3. A rotary device according to either one of claims 1 and 2, characterised in that the said longitudinal elements (106) are mounted in the said crown wheels (102, 104) with play along the direction of the axis X, X′.
4. A rotary device according to any one of claims 1 to 3, characterised in that the said longitudinal elements (106) are made of a plastics material and the said crown wheels (102, 104) are of metal.
EP89401408A 1988-05-25 1989-05-24 Rotary gear apparatus for the circulation of a fluid Expired - Lifetime EP0344059B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8806920 1988-05-25
FR8806920A FR2632020B1 (en) 1988-05-25 1988-05-25 ROTATING GEAR DEVICE FOR THE CIRCULATION OF A LIQUID

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EP0344059A1 EP0344059A1 (en) 1989-11-29
EP0344059B1 true EP0344059B1 (en) 1991-07-31

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EP89401408A Expired - Lifetime EP0344059B1 (en) 1988-05-25 1989-05-24 Rotary gear apparatus for the circulation of a fluid

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US (1) US4958996A (en)
EP (1) EP0344059B1 (en)
DE (1) DE68900174D1 (en)
ES (1) ES2025849T3 (en)
FR (1) FR2632020B1 (en)

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WO2014146190A1 (en) 2013-03-21 2014-09-25 James Klassen Slurry pump
US11067076B2 (en) 2015-09-21 2021-07-20 Genesis Advanced Technology Inc. Fluid transfer device

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DE325849C (en) * 1917-03-03 1920-09-21 Emil Ludwig Gear pump in which a spur gear works together with an internally toothed ring gear
US1496737A (en) * 1922-06-03 1924-06-03 Viking Pump Company Rotary pump, motor, or engine
GB270000A (en) * 1926-02-02 1927-05-02 Stone J & Co Ltd Improvements in rotary engines, pumps, blowers, compressors, meters and the like
US2672824A (en) * 1944-05-11 1954-03-23 Gerotor May Corp Hydraulic pump or motor
US2621603A (en) * 1948-08-31 1952-12-16 Julian B Thomas Rotary pump
US2601397A (en) * 1950-04-11 1952-06-24 Hill Myron Francis Rotary fluid displacement device
US2615399A (en) * 1950-09-09 1952-10-28 Peerless Machinery Co Rotary pump
US3233524A (en) * 1962-09-05 1966-02-08 Germane Corp Fluid operated motor
US3276288A (en) * 1963-12-20 1966-10-04 Fry Jeremy Joseph Housing for valve actuator or the like

Also Published As

Publication number Publication date
ES2025849T3 (en) 1992-04-01
US4958996A (en) 1990-09-25
FR2632020B1 (en) 1994-02-11
FR2632020A1 (en) 1989-12-01
DE68900174D1 (en) 1991-09-05
EP0344059A1 (en) 1989-11-29

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