EP1167756B1 - Axial piston pump - Google Patents

Axial piston pump Download PDF

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Publication number
EP1167756B1
EP1167756B1 EP01401515A EP01401515A EP1167756B1 EP 1167756 B1 EP1167756 B1 EP 1167756B1 EP 01401515 A EP01401515 A EP 01401515A EP 01401515 A EP01401515 A EP 01401515A EP 1167756 B1 EP1167756 B1 EP 1167756B1
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EP
European Patent Office
Prior art keywords
barrel
axis
rotor
driver
pump
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Expired - Lifetime
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EP01401515A
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German (de)
French (fr)
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EP1167756A1 (en
Inventor
Daniel c/o Madame Routier Bucheton
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Safran Landing Systems SAS
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Messier Bugatti SA
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Publication of EP1167756A1 publication Critical patent/EP1167756A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels

Definitions

  • the present invention relates to the field of hydraulic pumps, including piston pumps axial axes of the broken axis type.
  • axial piston pumps usually used include a body in which is rotatably mounted on its central axis a barrel presenting a series of axial holes in each from which slides a piston whose end is constraint to remain substantially in a fixed plane not perpendicular to the axis of the cylinder, causing their reciprocating motion in the holes during the rotation of said barrel.
  • the holes with their piston define and cylinders of varying volume in communication with suction and discharge ports of the pump through a dispensing ice fixed rise in the pump body and cooperating with the axial bearing face of the barrel on which open axial drilling.
  • This ice cream dispenser presents two bean-shaped recesses diametrically opposed and connected respectively to the suction port and at the discharge port.
  • Document FR-A-1 261 358 thus describes a pump barrel, which is however not the type with broken axis.
  • the barrel of this pump is in two coaxial bodies, rigidly secured by fixing bolts and centering studs.
  • the spring providing support barrel against the dispensing ice is interposed between a shoulder of the lower body and the cap central of a rotating and oscillating hat, itself interposed between a central ball and spans hemispherical formed on the axial pistons.
  • Such arrangement induces high friction prohibiting high rotational speeds.
  • Document FR-A-1,456,563 describes a pump in which the barrel is held in support against the dispensing ice by an elastic washer within reach taper against a counterpart shouldered shoulder on the support of the distribution ice, so with high friction.
  • the centering of the barrel is furthermore provided by a central tube secured to the support of the ice cream dispenser.
  • the trainer has therefore for only function to drive the cylinder in rotation, without intervene for the centering of the cylinder or for the pressing said barrel against the dispensing ice.
  • the structure of such a pump is extremely complex, and involves high friction limiting diets Operating.
  • NL-A-248 888 finally illustrates a pump broken axis in which the cylinder is driven in rotation by a coach screwed on the cylinder, in being centered on a fixed axis.
  • the support against ice distribution is ensured by Belleville washers in support against a ring mounted on a central axis integral with the support of the dispensing ice.
  • the coach has again only function to drive the cylinder in rotation.
  • the axial support of the barrel on the distribution window is obtained in a known manner by a spring bearing on the central area of the plateau, for example by through a central ball secured to the platter, and pushing the barrel against the ice of distribution.
  • the spring is installed between two moving parts between them, which generates friction sliding between the spring and at least one of the parts, resulting in wear and particle emission polluting the inside of the pump.
  • the aim of the invention is to overcome these disadvantages by proposing a hydraulic pump to axial pistons, in particular of the broken axle type, not having the aforementioned drawbacks and limitations.
  • a pump comprising a rotary barrel with a central axis cooperating with a distribution window associated with a surface bearing substantially perpendicular to this axis, barrel having a plurality of axial bores in which are mounted sliding pistons corresponding, the said pump being remarkable in that that a driver separate from the cylinder is provided for rotate along a substantially coincident axis of rotation with said central axis, said coach providing a share the centering and rotational drive of the barrel along said axis of rotation, and secondly the support of an elastic means pressing the support surface the barrel against the dispensing ice.
  • the barrel is free to move axially and angularly under the effect of the spring to compensate for defects alignment of its support surface on the ice of distribution during rotation.
  • the effort thrust spring is taken over by the coach, avoiding to solicit the other parts of the pump.
  • the spring is installed between two substantially immobile parts between them, thereby avoiding any sliding friction of the spring on one of the rooms.
  • the trainer receives the barrel in a hollow part, a reach inside the center coach the barrel on the axis of rotation, leaving free the axial sliding of the barrel with respect to the coach.
  • the reach is located substantially mid-axial length of the barrel.
  • the centering allows a certain angular movement of the barrel with respect to the coach.
  • the barrel is free to move angularly to stay permanently perfectly plated on the ice cream dispenser.
  • connection in rotation of the barrel and the driver is provided by equivalent mechanical means in form matches carried by said barrel and coach. It may be a cooperation of two symmetrical pins on one of these elements, with homologous cavities practiced on the other element, or as a variant of a cooperation of grooves one of those items at the scope level with some hollow counterparts practiced on the other element.
  • the rotational drive thus produced induces a pure couple on the barrel, preserving the freedom of movement of the barrel with respect to the coach.
  • the coach has a transverse wall substantially perpendicular to its axis rotation on an inner side of which is compressed the elastic support means of the barrel against ice cream.
  • the plateau is advantageously linked in rotation to the coach, preferably using a conical gear.
  • the parasitic force introduced by the tooth contact of the bevel gear in addition to the couple of training is filtered by the coach, thus sparing the barrel. Moreover, the movements of the barrel do not disturb the conditions of meshing.
  • the tray is secured in rotation with the driving shaft of the pump.
  • the plateau receives the ends tie rods in shaped associated receptacles, which are held on the board by means of a flange common circular connected to the plate by a screw Central.
  • a pump according to the invention comprises a pump body 1 consisting of two parts 1 a and 1 b hosting the components of the pump.
  • Part 1 a receives a distribution window 2 cooperating with a cylinder 3 according to a bearing surface denoted 4 perpendicular to the axis marked X of revolution of the barrel 3.
  • This barrel 3 comprises a series of axial holes 5, (c ' that is to say extending parallel to the axis of revolution or central axis X) to serve as guides to pistons 6.
  • a conduit 7 communicates the face 4 with the interior of the volume of space cylindrical delimited by each bore 5 and the piston 6 associated. It is through these ducts 7 that the oil is admitted or discharged into the cylindrical spaces.
  • a driver 8 Surrounding the barrel 3 is rotatably mounted a driver 8 composed of a cylindrical portion 9 accommodating the barrel 3, a transverse wall 10 forming a support for a spring 11 plating the barrel 3 against the dispensing window 2, and a conical pinion 12.
  • the driver 8 is here made in the form of a unitary piece, but it may alternatively be provided that the transverse wall 10 is an insert. In this case, it will be provided an axial abutment, reported (a ring for example) or not (a shoulder for example), to ensure the axial locking of the transverse wall 10, this locking being maintained permanently by the action of the spring 11.
  • the driver 8 is rotatably mounted on the portion 1a of the body 1, by means of bearings 13 in slant range, allowing the free rotation of the driver in a substantially axis coinciding with the central axis X of the barrel 3, and realizing its axial stop.
  • These bearings 13 transmit the force from the spring 11 to the part 1a of the body 1.
  • the coach 8 includes the part cylindrical 9 receiving the barrel 3 in its interior, and it is provided with the transverse wall forming a support spring 11, which wall is either integrally with said cylindrical wall 9 is reported.
  • the barrel 3 is centered on the axis of rotation of the coach 8 by an inner reach 24 of the coach 8, bearing on a consistent range associated with the barrel 3.
  • the short axial length of the scope, as well as the circumferential set installed preferably allows a certain angular deflection of the barrel 3 with respect to the coach 8, according to values that of course remain low but are sufficient to allow the barrel to float to hold perfectly against the distribution ice in permanence under the effect of the spring 11.
  • the driver 8 is provided with a conical pinion 12 intended to cooperate with a pinion 16 homologous arranged on a drive shaft 14 rotatably mounted by means of bearings 15 oblique range on the portion 1b of the body 1, and disposed along an axis Y which is concurrent with the X axis.
  • This shaft 14 thus has at its end a conical pinion 16 meshing with the conical pinion 12 of the coach.
  • this shaft 14 On the face of this shaft 14 forming a plate 33 facing the driver 8, are disposed axially grains 17 each having a cylindrical portion 18 snaking into a bore 19 associated with the face of the shaft 14, and each having a spherical receptacle 20 swiveling the spherical end 21 of an associated rod 22, the other end 23 also spherical is rotated on the corresponding piston 6.
  • the bore 19 is made substantially opposite the trace of the axis of the piston 6 on a plane normal to the Y axis passing through the center of the receptacles 20 of the grains 17.
  • the grains 17 are connected to the plate 33 by a flange circular 34 reported, common to all grains, by means of a central screw 35.
  • the rods 22 pass through the wall transverse 10 by means of lights made in said wall 10.
  • a light may be provided by rod 22, or alternatively lights that are common to several rods 22.
  • the central part of the plate 33 having been released from the support of the spring 11 as is known in the prior art, one can indeed take advantage of it for housing a screw 35 for holding the grains 17, and to realize the connection of the grains 17 to the plate 33 in a very simple, regardless of the number of grains.
  • Such a connection makes it possible not to bind the diameter of distribution of the grains 17 on the plate 33 to the diameter of the shaft 14 at the level of the bearings thereof.
  • the barrel 3 can be distinguished support on the distribution ice 2 presenting two through-holes 25,26 through-holes in the form of beans intended to port holes 5 of the barrel 3 either with the repression, or with suction of the pump.
  • the coach 8 is presented in partial section, which reveals a cylindrical scope 24 come internally to the coach 8, which cooperates here with a range 27 counterpart of the barrel 3, located substantially at mid-axial length of it.
  • the axial length of the range is reduced for, with the operating clearance installed between the two pieces, allow a slight floating of the barrel 3 with respect to the coach 8, so that the barrel 3 can constantly come against the dispensing ice cream 2, even if the bearing surface 4 of the barrel 3 or the ice cream dispenser 2 is not perfectly perpendicular to the X axis of rotation of the coach 8.
  • links 22 are not always perfectly aligned with the axis of the pistons 6. This results in parasites normal to the axis of the pistons 6, whose resultant substantially passes through a normal median plane to the axis X of the cylinder 3. By providing the scope for this level, we ensure that these efforts do not generate parasitic spill torque of the barrel 3 with respect to the coach 8.
  • a pin 28 of the barrel 3 is shown cooperating with the sidewall 29 of a notch 30 made in the cylindrical wall 9 of the coach 8, this with a view to rotating the barrel 3 by the coach 8.
  • the pins 28 are integral with the coach 8, and the notches 30 are provided in the barrel, or any other arrangement using means equivalent counterparts, such as splines to the right of the span 24, these grooves being provided on one of the said coach and barrel, and cooperating with homologous depressions provided on the other of these elements (variant not illustrated here).
  • the separation of the coach 8 from the barrel 3 also applies to axial piston pumps in line whose plate 33 is fixed in rotation, and on which slide pads at the end of the pistons axial 6, or axial piston pumps made of variable displacement line by inclination of the axis of rotation of the plate relative to the axis of the barrel, or by tilting the tray itself.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Steroid Compounds (AREA)

Abstract

The cranked axis axial piston pump has a split rotor concentrically aligned containing an outer drive element (8) and an inner barrel (3). This barrel (3) contains the axially aligned pistons (6) reciprocating in chambers whose face (4) is pressed against the port plate (2) by the effect of a compression spring (11). This configuration reduces friction and allows compensation between the mating faces of the port plate and the barrel. The cranked hydraulic pump with axial pistons (6) consists of a rotating barrel (3) with a central axis (X) co-operating with a distribution port plate (2) associated with a support surface (4) set at right angles to this axis (X). The barrel (3) has a series of axial drillings (5) in which are mounted in a sliding fashion the corresponding pistons (6). A drive (8) distinct from the barrel (3) is provided to rotate about the axis (X) which ensures on one part the centring and driving of the barrel (3) about the axis of rotation (X) and on the other part the reaction for a spring (11) pushing the support surface (4) of the barrel (3) against the port plate (2).

Description

La présente invention concerne le domaine des pompes hydrauliques, et notamment les pompes à pistons axiaux du type à axe brisé.The present invention relates to the field of hydraulic pumps, including piston pumps axial axes of the broken axis type.

D'une façon générale, les pompes à pistons axiaux habituellement utilisées comportent un corps dans lequel est monté rotatif selon son axe central un barillet présentant une série de perçages axiaux dans chacun desquels coulisse un piston, dont l'extrémité est contrainte à rester sensiblement dans un plan fixe non perpendiculaire à l'axe du barillet, provoquant leur mouvement alternatif dans les perçages lors de la rotation dudit barillet.In general, axial piston pumps usually used include a body in which is rotatably mounted on its central axis a barrel presenting a series of axial holes in each from which slides a piston whose end is constraint to remain substantially in a fixed plane not perpendicular to the axis of the cylinder, causing their reciprocating motion in the holes during the rotation of said barrel.

Les perçages munis de leur piston définissent ainsi des cylindres de volume variable en communication avec des orifices d'aspiration et de refoulement de la pompe par l'intermédiaire d'une glace de distribution montée fixe dans le corps de pompe et coopérant avec la face d'appui axiale du barillet sur laquelle débouchent les perçages axiaux. Cette glace de distribution présente deux évidements en forme de haricot diamétralement opposés et reliés respectivement à l'orifice d'aspiration et à l'orifice de refoulement.The holes with their piston define and cylinders of varying volume in communication with suction and discharge ports of the pump through a dispensing ice fixed rise in the pump body and cooperating with the axial bearing face of the barrel on which open axial drilling. This ice cream dispenser presents two bean-shaped recesses diametrically opposed and connected respectively to the suction port and at the discharge port.

Le document FR-A-1 261 358 décrit ainsi une pompe à barillet, qui n'est cependant pas du type à axe brisé. Le barillet de cette pompe est en deux corps coaxiaux, rigidement solidaires par des boulons de fixation et des goujons de centrage. Le ressort assurant l'appui du barillet contre la glace de distribution est interposé entre un épaulement du corps inférieur et la calotte centrale d'un chapeau tournant et oscillant, lui-même interposé entre une rotule centrale et des portées hémisphériques ménagées sur les pistons axiaux. Un tel agencement induit des frottements élevés interdisant des régimes de rotation élevés.Document FR-A-1 261 358 thus describes a pump barrel, which is however not the type with broken axis. The barrel of this pump is in two coaxial bodies, rigidly secured by fixing bolts and centering studs. The spring providing support barrel against the dispensing ice is interposed between a shoulder of the lower body and the cap central of a rotating and oscillating hat, itself interposed between a central ball and spans hemispherical formed on the axial pistons. Such arrangement induces high friction prohibiting high rotational speeds.

Le document FR-A-1 456 563 décrit une pompe dans laquelle le barillet est maintenu en appui contre la glace de distribution par une rondelle élastique à portée conique en appui contre un épaulement homologue prévu sur le support de la glace de distribution, donc avec des frottements élevés. Le centrage du barillet est en outre assuré par un tube central solidaire du support de la glace de distribution. L'entraíneur a donc pour seule fonction d'entraíner le barillet en rotation, sans intervenir pour le centrage du barillet ou pour le pressage dudit barillet contre la glace de distribution. La structure d'une telle pompe est extrêmement complexe, et implique des frottements élevés limitant les régimes de fonctionnement.Document FR-A-1,456,563 describes a pump in which the barrel is held in support against the dispensing ice by an elastic washer within reach taper against a counterpart shouldered shoulder on the support of the distribution ice, so with high friction. The centering of the barrel is furthermore provided by a central tube secured to the support of the ice cream dispenser. The trainer has therefore for only function to drive the cylinder in rotation, without intervene for the centering of the cylinder or for the pressing said barrel against the dispensing ice. The structure of such a pump is extremely complex, and involves high friction limiting diets Operating.

Le document NL-A-248 888 illustre enfin une pompe à axe brisé dans laquelle le barillet est entraíné en rotation par un entraíneur vissé sur le barillet, en étant centré sur un axe fixe. L'appui contre la glace de distribution est assuré par des rondelles Belleville en appui contre une bague montée sur un axe central solidaire du support de la glace de distribution. L'entraíneur a là encore pour seule fonction d'entraíner le barillet en rotation.NL-A-248 888 finally illustrates a pump broken axis in which the cylinder is driven in rotation by a coach screwed on the cylinder, in being centered on a fixed axis. The support against ice distribution is ensured by Belleville washers in support against a ring mounted on a central axis integral with the support of the dispensing ice. The coach has again only function to drive the cylinder in rotation.

Si l'on sait aujourd'hui obtenir des faces d'appui d'une planéité poussée, les tolérances d'usinage, notamment la perpendicularité de la surface d'appui à l'axe de rotation du barillet, font que les déformations en cours de fonctionnement ne permettent pas de garantir que le barillet soit en permanence en appui par toute sa surface d'appui sur la glace de distribution.If we know today how to obtain faces of support of a flatness pushed, the tolerances of machining, especially the perpendicularity of the bearing surface to the axis of rotation of the barrel, make the deformations during operation do not guarantee that the barrel is permanently supported by all its bearing surface on the dispensing ice.

Par ailleurs, pour éviter que l'extrémité du piston ne glisse sur le plateau matérialisant le plan fixe, un perfectionnement classique de ce type de pompes consiste à faire tourner ce plateau avec le barillet selon un axe normal au plan fixe et concourant avec celui du barillet, au moyen d'une liaison homocinétique, par exemple un engrènement à pignons coniques. Une biellette est alors avantageusement prévue entre chaque piston axial et le plateau, rotulée à ses deux extrémités. On a ainsi éliminé tout frottement de glissement entre les parties mobiles, hormis le coulissement du piston dans son perçage.Moreover, to prevent the end of the piston does not slide on the board materializing the plane fixed, a classic improvement of this type of pumps is to turn this tray with the barrel along an axis normal to the fixed plane and concurrent with that of the barrel, by means of a homokinetic connection, by example a meshing with bevel gears. A link is then advantageously provided between each piston axial and the plate, rotated at both ends. We have thus eliminated any sliding friction between moving parts, except for the sliding of the piston his piercing.

Toujours dans le cadre de ce perfectionnement, l'appui axial du barillet sur la glace de distribution s'obtient de façon connue par un ressort prenant appui sur la zone centrale du plateau, par exemple par l'intermédiaire d'une bille centrale solidaire du plateau, et poussant le barillet contre la glace de distribution. Le ressort est donc installé entre deux pièces mobiles entre elles, ce qui génère des frottements de glissement entre le ressort et au moins une des pièces, entraínant leur usure et l'émission de particules polluant l'intérieur de la pompe.Also as part of this development, the axial support of the barrel on the distribution window is obtained in a known manner by a spring bearing on the central area of the plateau, for example by through a central ball secured to the platter, and pushing the barrel against the ice of distribution. The spring is installed between two moving parts between them, which generates friction sliding between the spring and at least one of the parts, resulting in wear and particle emission polluting the inside of the pump.

En outre, l'effort du ressort s'ajoute à ceux des biellettes forçant les pistons dans les perçages du barillet pour donner un effort important sur le plateau, ce qui surcharge les paliers concernés.In addition, the effort of the spring is added to those of rods forcing the pistons into the holes of the barrel to give a significant effort on the plateau, which overloads the bearings concerned.

L'invention a pour but de pallier ces inconvénients en proposant une pompe hydraulique à pistons axiaux, notamment du type à axe brisé ne présentant pas les inconvénients et limitations précités.The aim of the invention is to overcome these disadvantages by proposing a hydraulic pump to axial pistons, in particular of the broken axle type, not having the aforementioned drawbacks and limitations.

Ce problème est résolu grâce à une pompe comportant un barillet rotatif à axe central coopérant avec une glace de distribution associée selon une surface d'appui sensiblement perpendiculaire à cet axe, ledit barillet présentant une pluralité de perçages axiaux dans lesquels sont montés coulissants les pistons correspondants, la dite pompe étant remarquable en ce qu'un entraíneur distinct du barillet est prévu pour tourner selon un axe de rotation essentiellement confondu avec ledit axe central, ledit entraíneur assurant d'une part le centrage et l'entraínement en rotation du barillet selon ledit axe de rotation, et d'autre part l'appui d'un moyen élastique pressant la surface d'appui du barillet contre la glace de distribution.This problem is solved thanks to a pump comprising a rotary barrel with a central axis cooperating with a distribution window associated with a surface bearing substantially perpendicular to this axis, barrel having a plurality of axial bores in which are mounted sliding pistons corresponding, the said pump being remarkable in that that a driver separate from the cylinder is provided for rotate along a substantially coincident axis of rotation with said central axis, said coach providing a share the centering and rotational drive of the barrel along said axis of rotation, and secondly the support of an elastic means pressing the support surface the barrel against the dispensing ice.

Ainsi désolidarisé de l'entraíneur, le barillet est libre de se déplacer axialement et angulairement sous l'effet du ressort pour compenser les défauts d'alignement de sa face d'appui sur la glace de distribution lors de la rotation. Par ailleurs, l'effort de poussée du ressort est repris par l'entraíneur, évitant ainsi de solliciter les autres parties de la pompe. En outre, le ressort est installé entre deux pièces sensiblement immobiles entre elles, évitant ainsi tout frottement de glissement du ressort sur l'une des pièces.Thus disengaged from the coach, the barrel is free to move axially and angularly under the effect of the spring to compensate for defects alignment of its support surface on the ice of distribution during rotation. Moreover, the effort thrust spring is taken over by the coach, avoiding to solicit the other parts of the pump. In addition, the spring is installed between two substantially immobile parts between them, thereby avoiding any sliding friction of the spring on one of the rooms.

Selon une caractéristique avantageuse, l'entraíneur reçoit le barillet dans une partie creuse, une portée venue intérieurement sur l'entraíneur centrant le barillet sur l'axe de rotation, laissant libre le coulissement axial du barillet vis à vis de l'entraíneur.According to an advantageous characteristic, the trainer receives the barrel in a hollow part, a reach inside the center coach the barrel on the axis of rotation, leaving free the axial sliding of the barrel with respect to the coach.

Avantageusement, la portée est située sensiblement à mi-longueur axiale du barillet.Advantageously, the reach is located substantially mid-axial length of the barrel.

De ce fait, les efforts radiaux parasites dus aux pistons sont contrés sensiblement au niveau de leur introduction.As a result, parasitic radial forces due to pistons are countered substantially at the level of their introduction.

De préférence, le centrage autorise un certain débattement angulaire du barillet vis à vis de l'entraíneur.Preferably, the centering allows a certain angular movement of the barrel with respect to the coach.

Ainsi, le barillet est libre de se mouvoir angulairement pour rester en permanence parfaitement plaqué sur la glace de distribution.Thus, the barrel is free to move angularly to stay permanently perfectly plated on the ice cream dispenser.

Selon une autre caractéristique avantageuse, la liaison en rotation du barillet et de l'entraíneur est assurée par des moyens mécaniques homologues en correspondance de forme portés par lesdits barillet et entraíneur. Il pourra s'agir d'une coopération de deux ergots symétriques venus sur l'un de ces éléments, avec des cavités homologues pratiquées sur l'autre élément, ou en variante d'une coopération de cannelures venues sur l'un de ces éléments au niveau de la portée avec des creux homologues pratiqués sur l'autre élément.According to another advantageous characteristic, the connection in rotation of the barrel and the driver is provided by equivalent mechanical means in form matches carried by said barrel and coach. It may be a cooperation of two symmetrical pins on one of these elements, with homologous cavities practiced on the other element, or as a variant of a cooperation of grooves one of those items at the scope level with some hollow counterparts practiced on the other element.

L'entraínement en rotation ainsi réalisé induit un couple pur sur le barillet, préservant la liberté de mouvement du barillet vis à vis de l'entraíneur.The rotational drive thus produced induces a pure couple on the barrel, preserving the freedom of movement of the barrel with respect to the coach.

Avantageusement encore, l'entraíneur possède une paroi transversale sensiblement perpendiculaire à son axe de rotation sur une face interne de laquelle est compressé le moyen élastique d'appui du barillet contre la glace de distribution.Advantageously, the coach has a transverse wall substantially perpendicular to its axis rotation on an inner side of which is compressed the elastic support means of the barrel against ice cream.

Cette paroi contre ainsi l'effort du moyen élastique et le transmet au corps de pompe via la liaison rotative de l'entraíneur sur le corps (liaison par exemple assurée au moyen de roulements), sans que cet effort sollicite d'autres parties de la pompe, ni ne crée de frottements parasites.This wall against the effort of the means elastic and transmits it to the pump body via the link rotation of the coach on the body (connection by example provided by means of bearings), without this strain on other parts of the pump or create parasitic friction.

Dans un mode important de réalisation dans lequel les pistons axiaux sont montés articulés sur un plateau rotatif d'axe de rotation concourant à l'axe de l'entraíneur, le plateau est avantageusement lié en rotation à l'entraíneur, de préférence à l'aide d'un engrenage conique.In an important embodiment in which the axial pistons are mounted articulated on a plateau rotational axis of rotation contributing to the axis of the coach, the plateau is advantageously linked in rotation to the coach, preferably using a conical gear.

Dans ce cas, l'effort parasite introduit par le contact des dents de l'engrenage conique en plus du couple d'entraínement est filtré par l'entraíneur, épargnant ainsi le barillet. De plus, les mouvements du barillet ne perturbent pas les conditions d'engrènement.In this case, the parasitic force introduced by the tooth contact of the bevel gear in addition to the couple of training is filtered by the coach, thus sparing the barrel. Moreover, the movements of the barrel do not disturb the conditions of meshing.

Avantageusement, le plateau est solidaire en rotation avec l'arbre menant de la pompe.Advantageously, the tray is secured in rotation with the driving shaft of the pump.

Selon une disposition particulière, dans le cas où il s'agit d'une pompe dans laquelle les pistons axiaux sont articulés au plateau au moyen de biellettes à extrémités sphériques, le plateau reçoit les extrémités des biellettes dans des réceptacles associés conformés, qui sont maintenus sur le plateau au moyen d'une bride circulaire commune reliée au plateau par une vis centrale.According to a particular provision, in the case where it is a pump in which the axial pistons are articulated to the plate by means of connecting rods spherical ends, the plateau receives the ends tie rods in shaped associated receptacles, which are held on the board by means of a flange common circular connected to the plate by a screw Central.

D'autres caractéristiques et avantages ressortiront plus clairement à la lecture de la description qui suit des figures des dessins annexés, parmi lesquelles :

  • la figure 1 représente la coupe longitudinale d'une pompe hydraulique selon l'invention ;
  • la figure 2 est une vue partielle en perspective éclatée représentant l'agencement du barillet, de la glace de distribution et de l'entraíneur dans une pompe selon l'invention.
Other characteristics and advantages will emerge more clearly on reading the description which follows of the figures of the appended drawings, among which:
  • Figure 1 shows the longitudinal section of a hydraulic pump according to the invention;
  • Figure 2 is a partial exploded perspective view showing the arrangement of the barrel, the dispenser ice and the coach in a pump according to the invention.

En référence à la figure 1, une pompe selon l'invention comporte un corps de pompe 1 composé de deux parties 1a et 1b accueillant les éléments constitutifs de la pompe. La partie 1a reçoit une glace de distribution 2 coopérant avec un barillet 3 selon une face d'appui notée 4 perpendiculaire à l'axe noté X de révolution du barillet 3. Ce barillet 3 comporte une série de perçages 5 axiaux, (c'est-à-dire s'étendant parallèlement à l'axe de révolution ou axe central X) débouchants destinés à servir de guides à des pistons 6. Un conduit 7 met en communication la face 4 avec l'intérieur du volume de l'espace cylindrique délimité par chaque perçage 5 et le piston 6 associé. C'est par ces conduits 7 que l'huile est admise ou refoulée dans les espaces cylindriques.Referring to Figure 1, a pump according to the invention comprises a pump body 1 consisting of two parts 1 a and 1 b hosting the components of the pump. Part 1 a receives a distribution window 2 cooperating with a cylinder 3 according to a bearing surface denoted 4 perpendicular to the axis marked X of revolution of the barrel 3. This barrel 3 comprises a series of axial holes 5, (c ' that is to say extending parallel to the axis of revolution or central axis X) to serve as guides to pistons 6. A conduit 7 communicates the face 4 with the interior of the volume of space cylindrical delimited by each bore 5 and the piston 6 associated. It is through these ducts 7 that the oil is admitted or discharged into the cylindrical spaces.

Entourant le barillet 3 est monté en rotation un entraíneur 8 composé d'une partie cylindrique 9 accueillant le barillet 3, d'une paroi transversale 10 formant fond servant d'appui à un ressort 11 plaquant le barillet 3 contre la glace de distribution 2, et d'un pignon conique 12. L'entraíneur 8 est ici réalisé sous la forme d'une pièce unitaire, mais on pourra en variante prévoir que la paroi transversale 10 est une pièce rapportée. Dans ce cas, il sera prévu une butée axiale, rapportée (un jonc par exemple) ou non (un épaulement par exemple), pour assurer le blocage axial de la paroi transversale 10, ce blocage étant maintenu en permanence par l'action du ressort 11. L'entraíneur 8 est monté rotatif sur la partie 1a du corps 1, au moyen de roulements 13 à portée oblique, autorisant la libre rotation de l'entraíneur selon un axe essentiellement confondu avec l'axe central X du barillet 3, et réalisant son arrêt axial. Ces roulements 13 transmettent l'effort du ressort 11 à la partie 1a du corps 1.Surrounding the barrel 3 is rotatably mounted a driver 8 composed of a cylindrical portion 9 accommodating the barrel 3, a transverse wall 10 forming a support for a spring 11 plating the barrel 3 against the dispensing window 2, and a conical pinion 12. The driver 8 is here made in the form of a unitary piece, but it may alternatively be provided that the transverse wall 10 is an insert. In this case, it will be provided an axial abutment, reported (a ring for example) or not (a shoulder for example), to ensure the axial locking of the transverse wall 10, this locking being maintained permanently by the action of the spring 11. the driver 8 is rotatably mounted on the portion 1a of the body 1, by means of bearings 13 in slant range, allowing the free rotation of the driver in a substantially axis coinciding with the central axis X of the barrel 3, and realizing its axial stop. These bearings 13 transmit the force from the spring 11 to the part 1a of the body 1.

L'entraíneur 8 comprend ainsi la partie cylindrique 9 recevant le barillet 3 en son intérieur, et il est muni de la paroi 10 transversale formant appui du ressort 11, laquelle paroi est soit venue intégralement avec ladite paroi cylindrique 9, soit rapportée.The coach 8 includes the part cylindrical 9 receiving the barrel 3 in its interior, and it is provided with the transverse wall forming a support spring 11, which wall is either integrally with said cylindrical wall 9 is reported.

Le barillet 3 est centré sur l'axe de rotation de l'entraíneur 8 par une portée 24 intérieure de l'entraíneur 8, prenant appui sur une portée conformée associée du barillet 3. La courte longueur axiale de la portée, ainsi que le jeu circonférentiel installé autorise de préférence un certain débattement angulaire du barillet 3 vis à vis de l'entraíneur 8, selon des valeurs qui restent bien entendu faibles, mais sont suffisantes pour permettre au barillet de flotter pour se maintenir parfaitement contre la glace de distribution en permanence sous l'effet du ressort 11.The barrel 3 is centered on the axis of rotation of the coach 8 by an inner reach 24 of the coach 8, bearing on a consistent range associated with the barrel 3. The short axial length of the scope, as well as the circumferential set installed preferably allows a certain angular deflection of the barrel 3 with respect to the coach 8, according to values that of course remain low but are sufficient to allow the barrel to float to hold perfectly against the distribution ice in permanence under the effect of the spring 11.

Par ailleurs, l'entraíneur 8 est muni d'un pignon conique 12 destiné à coopérer avec un pignon 16 homologue agencé sur un arbre menant 14 monté rotatif au moyen de roulements 15 à portée oblique sur la partie 1b du corps 1, et disposé selon un axe Y qui est concourant avec l'axe X. Cet arbre 14 présente ainsi à son extrémité un pignon conique 16 engrenant avec le pignon conique 12 de l'entraíneur. Sur la face de cet arbre 14 formant un plateau 33 en regard de l'entraíneur 8, sont disposés axialement des grains 17 comportant chacun une partie cylindrique 18 s'enfilant dans un alésage 19 associé ménagé sur la face de l'arbre 14, et présentant chacun un réceptacle sphérique 20 rotulant l'extrémité sphérique 21 d'une biellette 22 associée, dont l'autre extrémité 23 également sphérique est rotulée sur le piston 6 correspondant. L'alésage 19 est réalisé sensiblement en regard de la trace de l'axe du piston 6 sur un plan normal à l'axe Y passant par le centre des réceptacles 20 des grains 17. Les grains 17 sont liés au plateau 33 par une bride circulaire 34 rapportée, commune à tous les grains, au moyen d'une vis centrale 35.Furthermore, the driver 8 is provided with a conical pinion 12 intended to cooperate with a pinion 16 homologous arranged on a drive shaft 14 rotatably mounted by means of bearings 15 oblique range on the portion 1b of the body 1, and disposed along an axis Y which is concurrent with the X axis. This shaft 14 thus has at its end a conical pinion 16 meshing with the conical pinion 12 of the coach. On the face of this shaft 14 forming a plate 33 facing the driver 8, are disposed axially grains 17 each having a cylindrical portion 18 snaking into a bore 19 associated with the face of the shaft 14, and each having a spherical receptacle 20 swiveling the spherical end 21 of an associated rod 22, the other end 23 also spherical is rotated on the corresponding piston 6. The bore 19 is made substantially opposite the trace of the axis of the piston 6 on a plane normal to the Y axis passing through the center of the receptacles 20 of the grains 17. The grains 17 are connected to the plate 33 by a flange circular 34 reported, common to all grains, by means of a central screw 35.

Les biellettes 22 passent au travers de la paroi transversale 10 au moyen de lumières pratiquées dans ladite paroi 10. On pourra prévoir une lumière par biellette 22, ou en variante des lumières qui sont communes à plusieurs biellettes 22. Au cas ou cette paroi serait rapportée sur l'entraíneur 8, il faut veiller à ce que cette paroi soit arrêtée en rotation par rapport à l'entraíneur 8, pour éviter que cette paroi 10 ne tourne vis à vis de l'entraíneur 8 et vienne heurter les biellettes 22.The rods 22 pass through the wall transverse 10 by means of lights made in said wall 10. A light may be provided by rod 22, or alternatively lights that are common to several rods 22. In case this wall would be reported on the coach 8, we must ensure that that this wall is stopped in rotation with respect to the coach 8, to prevent this wall 10 turns with respect to coach 8 and come up against the connecting rods 22.

La partie centrale du plateau 33 ayant été dégagée de l'appui du ressort 11 tel que cela est connu dans l'art antérieur, on peut en effet en profiter pour y loger une vis 35 de maintien des grains 17 , et réaliser la liaison des grains 17 au plateau 33 de façon très simple, et ce quel que soit le nombre de grains prévus. Une telle liaison permet de ne pas lier le diamètre de répartition des grains 17 sur le plateau 33 au diamètre de l'arbre 14 au niveau des paliers de celui-ci. The central part of the plate 33 having been released from the support of the spring 11 as is known in the prior art, one can indeed take advantage of it for housing a screw 35 for holding the grains 17, and to realize the connection of the grains 17 to the plate 33 in a very simple, regardless of the number of grains. Such a connection makes it possible not to bind the diameter of distribution of the grains 17 on the plate 33 to the diameter of the shaft 14 at the level of the bearings thereof.

Sur la figure 2, on distingue le barillet 3 en appui sur la glace de distribution 2 présentant deux orifices collecteurs 25,26 traversants en forme de haricot destinés à mettre en communication les perçages 5 du barillet 3 soit avec le refoulement, soit avec l'aspiration de la pompe.In FIG. 2, the barrel 3 can be distinguished support on the distribution ice 2 presenting two through-holes 25,26 through-holes in the form of beans intended to port holes 5 of the barrel 3 either with the repression, or with suction of the pump.

L'entraíneur 8 est présenté en coupe partielle, qui dévoile une portée cylindrique 24 venue intérieurement à l'entraíneur 8, qui coopère ici avec une portée 27 homologue du barillet 3, située sensiblement à mi-longueur axiale de celui-ci. La longueur axiale de la portée est réduite pour, avec le jeu de fonctionnement installé entre les deux pièces, permettre un léger flottement du barillet 3 vis à vis de l'entraíneur 8, afin que le barillet 3 puisse en permanence venir contre la glace de distribution 2, même si la face d'appui 4 du barillet 3 ou la glace de distribution 2 n'est pas parfaitement perpendiculaire à l'axe X de rotation de l'entraíneur 8.The coach 8 is presented in partial section, which reveals a cylindrical scope 24 come internally to the coach 8, which cooperates here with a range 27 counterpart of the barrel 3, located substantially at mid-axial length of it. The axial length of the range is reduced for, with the operating clearance installed between the two pieces, allow a slight floating of the barrel 3 with respect to the coach 8, so that the barrel 3 can constantly come against the dispensing ice cream 2, even if the bearing surface 4 of the barrel 3 or the ice cream dispenser 2 is not perfectly perpendicular to the X axis of rotation of the coach 8.

Lors du fonctionnement de la pompe, les biellettes 22 ne sont pas toujours parfaitement alignées avec l'axe des pistons 6. Il en résulte des efforts parasites normaux à l'axe des pistons 6, dont la résultante passe sensiblement par un plan médian normal à l'axe X du barillet 3. En prévoyant la portée à ce niveau, on s'assure que ces efforts ne génèrent pas de couple parasite de déversement du barillet 3 vis à vis de l'entraíneur 8.During the operation of the pump, links 22 are not always perfectly aligned with the axis of the pistons 6. This results in parasites normal to the axis of the pistons 6, whose resultant substantially passes through a normal median plane to the axis X of the cylinder 3. By providing the scope for this level, we ensure that these efforts do not generate parasitic spill torque of the barrel 3 with respect to the coach 8.

Par ailleurs, un ergot 28 du barillet 3 est montré coopérant avec le flanc 29 d'une encoche 30 réalisée dans la paroi cylindrique 9 de l'entraíneur 8, ceci en vue de l'entraínement en rotation du barillet 3 par l'entraíneur 8. On a prévu ici un agencement symétrique, pour faire en sorte que l'entraíneur 8 force le barillet 3 en rotation au moyen d'un couple pur. Bien entendu, on pourra prévoir une variante dans laquelle les ergots 28 sont solidaires de l'entraíneur 8, et les encoches 30 sont ménagées dans le barillet, ou encore tout autre agencement mettant en oeuvre des moyens mécaniques homologues en correspondance de forme, tel que des cannelures au droit de la portée 24, ces cannelures étant prévues sur l'un desdits entraíneur et barillet, et coopérant avec des creux homologues prévus sur l'autre de ces éléments (variante non illustrée ici).Moreover, a pin 28 of the barrel 3 is shown cooperating with the sidewall 29 of a notch 30 made in the cylindrical wall 9 of the coach 8, this with a view to rotating the barrel 3 by the coach 8. We have planned here an arrangement symmetrical, to make sure that the coach 8 forces the barrel 3 in rotation by means of a pure torque. Good understood, we can foresee a variant in which the pins 28 are integral with the coach 8, and the notches 30 are provided in the barrel, or any other arrangement using means equivalent counterparts, such as splines to the right of the span 24, these grooves being provided on one of the said coach and barrel, and cooperating with homologous depressions provided on the other of these elements (variant not illustrated here).

L'invention n'est pas limitée au mode particulier de réalisation qui vient d'être décrit, mais englobe au contraire toute variante, qui avec des moyens équivalents, reproduirait les caractéristiques essentielles décrites ici.The invention is not limited to the particular mode which has just been described, but contrary any variant, which with means equivalent, reproduce the characteristics essential elements described here.

En particulier, on pourra lier l'entraíneur 8 à un arbre menant de la pompe, auquel cas le plateau 33 sera entraíné par l'entraíneur 8.In particular, we can link coach 8 to a shaft leading from the pump, in which case the plate 33 will be driven by the coach 8.

Par ailleurs, pour lier en rotation le plateau 33 à l'entraíneur 8, on pourra envisager d'autres types de liaisons, telle qu'une liaison par cardans, par friction ou autre.Moreover, to bind in rotation the plate 33 at coach 8, we can consider other types of connections, such as a universal joint, by friction Or other.

Enfin, la séparation de l'entraíneur 8 d'avec le barillet 3 s'applique aussi à des pompes à pistons axiaux en ligne dont le plateau 33 est fixe en rotation, et sur lequel glissent des patins en extrémité des pistons axiaux 6, ou encore à des pompes à pistons axiaux en ligne à cylindrée variable par inclinaison de l'axe de rotation du plateau par rapport à l'axe du barillet, ou par inclinaison du plateau lui-même.Finally, the separation of the coach 8 from the barrel 3 also applies to axial piston pumps in line whose plate 33 is fixed in rotation, and on which slide pads at the end of the pistons axial 6, or axial piston pumps made of variable displacement line by inclination of the axis of rotation of the plate relative to the axis of the barrel, or by tilting the tray itself.

Claims (12)

  1. A hydraulic pump having axial pistons (6), the pump comprising a rotary rotor (3) with a central axis (X) co-operating with an associated distribution seat (2) via a bearing surface (4) that is substantially perpendicular to said axis (X), said rotor (3) presenting a plurality of axial bores (5) slidably receiving corresponding pistons (6), the pump being characterized in that a driver (8) separate from the rotor (3) is provided to rotate about an axis of rotation that essentially coincides with said central axis (X), said driver (8) serving firstly to center and rotate the rotor (3) about said axis of rotation (X), and secondly to apply resilient thrust (11) to press the bearing surface (9) of the rotor (3) against the distribution seat (2).
  2. A pump according to claim 1, characterized in that the driver (8) receives the rotor (3) in a hollow portion (31), and in that a bearing surface (24) formed inside the driver (8) centers the rotor (3) on the axis of rotation (X), while leaving the rotor (3) free to slide axially relative to the driver (8).
  3. A pump according to claim 1 or claim 2, characterized in that the bearing surface (24) is situated axially substantially halfway along the rotor (3).
  4. A pump according to any preceding claim, characterized in that the centering leaves the rotor (3) with a certain amount of freedom to move angularly relative to the driver (8).
  5. A pump according to any preceding claim, characterized in that the rotor (3) and the driver (8) are linked in rotation by corresponding mechanical means of complementary shapes carried by said rotor (3) and driver (8).
  6. A pump according to claim 5, characterized in that the rotary link between the rotor (3) and the driver (8) is provided by co-operation between two symmetrical lugs (28) provided on one of said elements and complementary cavities (29) formed in the other element.
  7. A pump according to claim 5, characterized in that the rotary link between the rotor (3) and the driver (8) is provided by co-operation of fluting formed on one of the elements at the bearing surface (24) with complementary fluting formed on the other element.
  8. A pump according to any preceding claim, characterized in that the driver (8) has a transverse wall (10) substantially perpendicular to its axis of rotation (X), with resilient means (11) compressed against an inside face thereof to thrust the rotor (3) against the distribution seat (2).
  9. A pump according to any preceding claim, in which the axial pistons (6) are hinged to a rotary swashplate (33) whose axis of rotation (Y) intersects the axis (X) of the driver (8), characterized in that the swashplate (33) is coupled to rotate with the driver (8).
  10. A pump according to claim 9, in which the rotary coupling is provided by means of bevel gearing (12, 16).
  11. A pump according to claim 9 or claim 10, characterized in that the swashplate (33) is constrained to rotate with the drive shaft (14) of said pump.
  12. A pump according to any one of claims 9 to 11, in which the axial pistons (6) are hinged to the swashplate (33) by means of links (22) having spherical ends (21, 23), the pump being characterized in that the swashplate (33) receives the ends of the links (21) in associated shaped sockets (20) which are held to the swashplate (33) by means of a common coupling plate (34) connected to the swashplate (33) by means of a central bolt (35).
EP01401515A 2000-06-30 2001-06-12 Axial piston pump Expired - Lifetime EP1167756B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0008482 2000-06-30
FR0008482A FR2811032B1 (en) 2000-06-30 2000-06-30 BREAKED AXIS TYPE AXIAL PISTON PUMP

Publications (2)

Publication Number Publication Date
EP1167756A1 EP1167756A1 (en) 2002-01-02
EP1167756B1 true EP1167756B1 (en) 2005-04-27

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ID=8851934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01401515A Expired - Lifetime EP1167756B1 (en) 2000-06-30 2001-06-12 Axial piston pump

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US (1) US6564693B2 (en)
EP (1) EP1167756B1 (en)
JP (1) JP4943594B2 (en)
AT (1) ATE294327T1 (en)
CA (1) CA2350151C (en)
DE (1) DE60110314T2 (en)
ES (1) ES2240367T3 (en)
FR (1) FR2811032B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030093471A1 (en) 2001-10-18 2003-05-15 Mitch Upton System and method using asynchronous messaging for application integration
US8668469B2 (en) * 2011-04-28 2014-03-11 Caterpillar Inc. Hydraulic piston pump with reduced restriction barrel passage
CN112332704B (en) * 2020-11-15 2021-10-29 浙江师范大学 Self-powered monitoring rolling bearing

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL248888A (en) * 1900-01-01
US2177008A (en) * 1937-07-23 1939-10-24 Ex Cell O Corp Hydraulic motor
FR1261358A (en) * 1960-04-06 1961-05-19 Rech Etudes Production Sarl Barrel pump and motor
FR1456563A (en) * 1965-07-05 1966-07-08 Swash plate type fluid device
US4941395A (en) * 1988-09-08 1990-07-17 Sundstrand Corporation Bent-axis hydraulic apparatus

Also Published As

Publication number Publication date
CA2350151A1 (en) 2001-12-30
DE60110314T2 (en) 2006-02-16
FR2811032A1 (en) 2002-01-04
JP2002054560A (en) 2002-02-20
JP4943594B2 (en) 2012-05-30
CA2350151C (en) 2005-04-12
US20020000159A1 (en) 2002-01-03
DE60110314D1 (en) 2005-06-02
ES2240367T3 (en) 2005-10-16
US6564693B2 (en) 2003-05-20
FR2811032B1 (en) 2002-11-22
ATE294327T1 (en) 2005-05-15
EP1167756A1 (en) 2002-01-02

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