FR3012181A1 - HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION - Google Patents

HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION Download PDF

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Publication number
FR3012181A1
FR3012181A1 FR1360278A FR1360278A FR3012181A1 FR 3012181 A1 FR3012181 A1 FR 3012181A1 FR 1360278 A FR1360278 A FR 1360278A FR 1360278 A FR1360278 A FR 1360278A FR 3012181 A1 FR3012181 A1 FR 3012181A1
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FR
France
Prior art keywords
pump
suction
housing
discharge
drainage
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.)
Withdrawn
Application number
FR1360278A
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French (fr)
Inventor
Francois Porel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydro Leduc SAS
Original Assignee
Hydro Leduc SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydro Leduc SAS filed Critical Hydro Leduc SAS
Priority to FR1360278A priority Critical patent/FR3012181A1/en
Priority to EP20140188250 priority patent/EP2865892A1/en
Priority to US14/520,908 priority patent/US20150110656A1/en
Publication of FR3012181A1 publication Critical patent/FR3012181A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • 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
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • 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
    • F04B1/2042—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F03C1/0642—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined on main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/08—Distributing valve-gear peculiar thereto
    • F03C1/14—Distributing valve-gear peculiar thereto by driving liquid of engine
    • 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
    • F04B1/22—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 having two or more sets of cylinders or pistons
    • F04B1/24—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 having two or more sets of cylinders or pistons inclined to the main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/04—Draining

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

Pompe hydraulique comportant une pluralité de pistons (3) coulissant dans des alésages ménagés dans un barillet (5) monté en rotation dans un carter (6) de la pompe, ledit barillet (5) prenant appui contre une glace de distribution (7) portée par une culasse (9). Deux canaux de drainage (14) mettent un espace intérieur (17) du carter (6) en communication respectivement avec deux orifices d'aspiration/refoulement (20) de la culasse (9). Chaque canal de drainage (14) est muni d'un clapet (12) apte à obturer le canal de drainage en réponse à une surpression dans l'orifice d'aspiration/refoulement (20) de telle sorte que, selon le sens de rotation de la pompe, l'espace intérieur du carter (17) est en communication à travers l'un des canaux de drainage (14) avec la canalisation d'aspiration (A) ; tandis que la communication par l'autre canal de drainage (14) entre le refoulement et l'espace intérieur (17) du carter (6) est obturée.Hydraulic pump comprising a plurality of pistons (3) sliding in bores formed in a barrel (5) rotatably mounted in a casing (6) of the pump, said barrel (5) bearing against a dispensing ice (7) worn by a cylinder head (9). Two drainage channels (14) place an inner space (17) of the housing (6) in communication respectively with two suction / discharge ports (20) of the cylinder head (9). Each drainage channel (14) is provided with a valve (12) adapted to close the drainage channel in response to an overpressure in the suction / discharge orifice (20) so that, in the direction of rotation from the pump, the interior space of the housing (17) is in communication through one of the drainage channels (14) with the suction pipe (A); while the communication through the other drainage channel (14) between the discharge and the interior space (17) of the housing (6) is closed.

Description

POMPE HYDRAULIQUE A PISTONS A DISTRIBUTION PAR GLACE BI-DIRECTIONNELLE La présente invention concerne une pompe hydraulique à pistons et plus particulièrement une pompe hydraulique à pistons dans laquelle la distribution se fait 5 au moyen d'une glace. Pour permettre à une pompe à pistons à distribution par glace de pouvoir tourner soit en rotation droite soit en rotation gauche, il faut construire cette pompe d'une part en dessinant une glace de distribution symétrique de façon à ce que la zone de refoulement de la pompe puisse devenir une zone d'aspiration et 10 réciproquement ; d'autre part en implantant sur la pompe des orifices qui puissent recevoir soit un raccord d'aspiration soit un raccord de refoulement. Selon le sens de rotation de la pompe, chacun des deux orifices de la pompe deviendra soit un orifice d'aspiration, soit un orifice de refoulement. Dans une telle disposition, les fuites de la glace de distribution côté 15 refoulement de la pompe, qui est le côté en pression, vont être collectées par le carter de la pompe. Pour évacuer ces fuites, il est nécessaire de prévoir une liaison du carter de la pompe vers le réservoir d'alimentation de la pompe en installant un circuit de drainage. 20 Cette nécessité de disposer un circuit de drainage est un inconvénient. L'objet de la présente invention est de réaliser une pompe à pistons pouvant tourner soit en rotation droite, soit en rotation gauche sans avoir à mettre en place un circuit spécifique de drainage de la pompe. Dans ce but, la pompe selon la présente invention comporte une pluralité de 25 pistons coulissant dans des alésages ménagés dans un barillet monté en rotation dans un carter de la pompe, ledit barillet prenant appui contre une glace de distribution portée par une culasse, ladite glace de distribution étant munie de deux lunules symétriques servant alternativement de lunule d'aspiration et de lunule de refoulement selon le sens de rotation de la pompe, et est caractérisée par le fait que la 30 culasse est munie de deux canaux de drainage mettant un espace intérieur du carter en communication respectivement avec deux orifices d'aspiration/refoulement de ladite culasse ; chaque canal de drainage étant muni d'un clapet apte à obturer le canal de drainage en réponse à une surpression dans l'orifice d'aspiration/refoulement de telle sorte que, selon le sens de rotation de la pompe, l'espace intérieur du carter soit en communication à travers l'un des canaux de drainage avec là canalisation d'aspiration ; tandis que la communication par l'autre 5 canal de drainage entre le refoulement et l'espace intérieur du carter soit obturée. Selon un mode de réalisation, le clapet comporte à chaque fois un ressort de compression logé dans le canal de drainage de manière à maintenir le clapet dans une position ouverte par défaut. L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et 10 avantages de celle-ci apparaîtront plus clairement au cours de la description suivante de plusieurs modes de réalisation particuliers de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux dessins annexés. Sur ces dessins : La figure 1 est une vue en coupe longitudinale d'une pompe hydraulique à 15 pistons de type connu. La figure 2 est une vue en coupe selon la ligne D-D de la figure 1. La figure 3 est une vue en perspective de la pompe de la figure 1 en rotation droite. La figure 4 est une vue en perspective de la pompe de la figure I en rotation 20 gauche. La figure 5 est une vue partielle, en coupe longitudinale, illustrant le fonctionnement de la zone d'aspiration de la pompe selon l'invention. La figure 6 est une vue partielle, en coupe longitudinale, illustrant le fonctionnement de la zone de refoulement de la pompe selon l'invention. 25 La figure 1 représente une pompe hydraulique à pistons comportant un arbre d'entrainement 1 muni d'un plateau 2 contre lequel prennent appui une pluralité d.e pistons 3 qui coulissent dans des alésages 4 ménagés dans un barillet 5 logé dans un carter 6, muni d'un orifice de drainage 8 fermé par un bouchon. Le barillet 5 prend appui contre une glace de distribution 7 portée par une culasse 9. 30 Sur la figure 2, qui est un vue en coupe selon D-D de la figure 1, on voit que, de façon connue, la glace de distribution 7 comporte deux lunules 10 et 11 qui sont des ouvertures en forme de haricot et qui sont symétriques. Selon le sens de rotation de l'arbre 1, ces lunules serviront alternativement à l'aspiration ou au refoulement. La figure 3 montre la position de la conduite d'aspiration A, lorsque l'arbre d'entrainement 1 est en rotation droite (ou sens de la montre).The present invention relates to a hydraulic piston pump and more particularly to a hydraulic piston pump in which the distribution is effected 5 by means of an ice-cream. To enable an ice-distributing piston pump to be able to rotate in either straight or left-hand rotation, this pump must be constructed on the one hand by drawing a symmetrical distribution window so that the discharge zone of the pump can become a suction zone and reciprocally; on the other hand by implanting on the pump orifices which can receive either a suction connection or a discharge connection. Depending on the direction of rotation of the pump, each of the two pump ports will become either a suction port or a discharge port. In such an arrangement, the leakage of the delivery side pump discharge ice, which is the pressure side, will be collected by the pump housing. To evacuate these leaks, it is necessary to provide a connection of the pump housing to the pump supply tank by installing a drainage circuit. This need for a drainage circuit is a disadvantage. The object of the present invention is to provide a piston pump that can rotate either in right rotation or in left rotation without having to set up a specific drainage circuit of the pump. For this purpose, the pump according to the present invention comprises a plurality of pistons sliding in bores formed in a cylinder rotatably mounted in a housing of the pump, said cylinder bearing against an ice distribution carried by a cylinder head, said ice dispensing device being provided with two symmetrical lunettes alternately serving suction and discharge heads in the direction of rotation of the pump, and is characterized by the fact that the cylinder head is provided with two drainage channels providing an interior space the housing in communication respectively with two suction / discharge ports of said cylinder head; each drainage channel being provided with a valve adapted to close the drainage channel in response to an overpressure in the suction / discharge orifice so that, in the direction of rotation of the pump, the internal space of the the housing is in communication through one of the drainage channels with the suction line; while communication through the other drainage channel between the discharge and the interior space of the housing is closed. According to one embodiment, the valve comprises each time a compression spring housed in the drainage channel so as to maintain the valve in an open position by default. The invention will be better understood, and other objects, details, features and advantages thereof will become more apparent in the following description of several particular embodiments of the invention, given solely for illustrative purposes and not limiting, with reference to the accompanying drawings. In these drawings: FIG. 1 is a longitudinal sectional view of a known type 15-piston hydraulic pump. Figure 2 is a sectional view along the line D-D of Figure 1. Figure 3 is a perspective view of the pump of Figure 1 in right rotation. Figure 4 is a perspective view of the pump of Figure I in left rotation. Figure 5 is a partial view, in longitudinal section, illustrating the operation of the suction zone of the pump according to the invention. Figure 6 is a partial view, in longitudinal section, illustrating the operation of the discharge zone of the pump according to the invention. FIG. 1 represents a hydraulic piston pump comprising a drive shaft 1 provided with a plate 2 against which a plurality of pistons 3 slide, which slide in bores 4 formed in a cylinder 5 housed in a housing 6, provided with a drainage hole 8 closed by a plug. The cylinder 5 bears against a dispensing window 7 carried by a cylinder head 9. In FIG. 2, which is a sectional view along line DD of FIG. 1, it can be seen that, in a known manner, the distribution window 7 comprises two lunules 10 and 11 which are openings in the form of beans and which are symmetrical. Depending on the direction of rotation of the shaft 1, these lunulas will serve alternately to suction or discharge. Figure 3 shows the position of the suction line A, when the drive shaft 1 is in right rotation (or direction of the watch).

La figure 4 montre la position de cette conduite d'aspiration A lorsque l'arbre d'entrainement tourne en rotation gauche (ou sens inverse de la montre). Une canalisation de refoulement B, non représentée aux figures 3 et 4 est branchée sur l'autre orifice de la culasse 9. Lors du fonctionnement de la pompe, il se produit des fuites de liquide 10 hydraulique du côté refoulement de la pompe. Ces fuites sont collectées dans le carter 6 et seront évacuées par l'orifice de drainage 8, qui, peut être relié à un circuit de drainage pour ramener le liquide provenant des fuites au réservoir. Un but de la présente invention est de supprimer ce circuit de drainage. Dans ce but la culasse 9 est munie de deux clapets anti-retour 12 15 communiquant avec les orifices d'aspiration/refoulement 20. Ces deux clapets 12 ont pour effet : - d'une part de permettre à l'espace intérieur 17 du carter 6 de communiquer librement par l'un des clapets 12 avec l'orifice d'aspiration 20 et la canalisation d'aspiration A, comme cela est illustré à la figure 5, ce qui met 20 l'espace intérieur 17 du carter 6 en liaison avec l'aspiration de la pompe et réalise le drainage de la pompe ; - d'autre part d'obturer, par l'autre clapet 12, la communication de l'orifice de refoulement 20 avec l'espace intérieur 17 du carter 6, comme cela est illustré à la figure 6.Figure 4 shows the position of this suction line A when the drive shaft rotates in left rotation (or opposite direction of the watch). A discharge pipe B, not shown in FIGS. 3 and 4, is connected to the other orifice of the cylinder head 9. During operation of the pump, hydraulic fluid leaks on the discharge side of the pump. These leaks are collected in the casing 6 and will be discharged through the drainage port 8, which can be connected to a drainage circuit to bring the liquid from the leaks to the reservoir. An object of the present invention is to suppress this drainage circuit. For this purpose the cylinder head 9 is provided with two non-return valves 12 15 communicating with the suction / discharge ports 20. These two valves 12 have the effect of: on the one hand to allow the inner space 17 of the casing 6 to freely communicate by one of the valves 12 with the suction port 20 and the suction pipe A, as shown in Figure 5, which puts the inner space 17 of the housing 6 in connection with the suction of the pump and carries out the drainage of the pump; on the other hand, by closing the other valve 12, the communication of the delivery orifice 20 with the internal space 17 of the casing 6, as illustrated in FIG.

25 Plus précisément, le clapet anti-retour comporte un ressort hélicoïdal 13, une bille 12 faisant office de clapet et un canal 14 ménagé dans la culasse 9 pour relier à chaque fois l'orifice d'aspiration/refoulement 20 à l'espace intérieur 17 du carter 6 de la pompe. Le canal 14 débouche dans le carter 6 au droit d'une portion périphérique de la glace de distribution 7 qui présente un passage de fluide vers 30 l'espace intérieur 17 du carter 6. Le ressort 13 est logé dans une section large du canal 14, en appui entre un épaulement du canal 14 côté carter et la bille 12 côté culasse. Par défaut, le ressort 13 maintient la bille 12 à distance d'un siège de clapet 18 entourant l'entrée du canal 14. Ainsi, le canal 14 est ouvert tant qu'il n'existe pas une surpression dans l'orifice d'aspiration/refoulement 20 par rapport à l'espace intérieur 17, qui est normalement à pression atmôsphérique. Le clapet 12 est donc un clapet ouvert par défaut qui obture le canal 14 en réponse à une surpression dans l'orifice d'aspiration/refoulement 20 de la culasse. Bien que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs 10 combinaisons si celles-ci entrent dans le cadre de l'invention. L'usage du verbe « comporter », « comprendre » ou « inclure » et de ses formes conjuguées n'exclut pas la présence d'autres éléments ou d'autres étapes que ceux énoncés dans une revendication. L'usage de l'article indéfini « un » pour un élément n'exclut pas, sauf mention contraire, la présence d'une pluralité de tels 15 éléments. Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication.More specifically, the non-return valve comprises a helical spring 13, a ball 12 acting as a valve and a channel 14 formed in the cylinder head 9 to each connect the suction / discharge port 20 to the interior space. 17 of the casing 6 of the pump. The channel 14 opens into the housing 6 to the right of a peripheral portion of the dispensing window 7 which has a fluid passage to the inner space 17 of the housing 6. The spring 13 is housed in a wide section of the channel 14 , supported between a shoulder of the channel 14 on the housing side and the ball 12 on the cylinder head side. By default, the spring 13 keeps the ball 12 away from a valve seat 18 surrounding the inlet of the channel 14. Thus, the channel 14 is open as long as there is no excess pressure in the orifice of suction / discharge 20 with respect to the interior space 17, which is normally at atmospheric pressure. The valve 12 is therefore a valve open by default which closes the channel 14 in response to an overpressure in the suction / discharge port 20 of the cylinder head. Although the invention has been described in connection with several particular embodiments, it is obvious that it is in no way limited thereto and that it comprises all the technical equivalents of the means described and their combinations if these These are within the scope of the invention. The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" for an element does not exclude, unless otherwise stated, the presence of a plurality of such elements. In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims (2)

REVENDICATIONS1. Pompe hydraulique à pistons du type comportant une pluralité de pistons (3) coulissant dans des alésages (4) ménagés dans un barillet (5) monté en rotation dans un carter (6) de la pompe, ledit barillet (5) prenant appui contre une glace de distribution (7) portée par une culasse (9), ladite glace de distribution (7) étant munie de deux lunules symétriques (10,11) servant alternativement de lunule d'aspiration et de lunule de refoulement selon le sens de rotation de la pompe, caractérisée par le fait que la culasse (9) est munie de deux canaux de drainage (14) mettant un espace intérieur (17) du carter (6) en communication respectivement avec deux orifices d'aspiration/refoulement (20) de ladite culasse (9) ; chaque canal de drainage (14) étant muni d'un clapet (12) apte à obturer le canal de drainage en réponse à une surpression dans l'orifice d'aspiration/refoulement (20) de telle sorte que, selon le sens de rotation de la pompe, l'espace intérieur du carter (17) soit en communication à travers l'un des canaux de drainage (14) avec la canalisation d'aspiration (A) ; tandis que la communication par l'autre canal de drainage (14) entre le refoulement et l'espace intérieur (17) du carter (6) soit obturée.REVENDICATIONS1. Hydraulic piston pump of the type comprising a plurality of pistons (3) sliding in bores (4) formed in a cylinder (5) rotatably mounted in a casing (6) of the pump, said cylinder (5) bearing against a distribution window (7) carried by a cylinder head (9), said dispensing window (7) being provided with two symmetrical lunettes (10, 11) alternately serving suction and discharge heads in the direction of rotation of the the pump, characterized in that the cylinder head (9) is provided with two drainage channels (14) placing an internal space (17) of the housing (6) in communication with two suction / discharge ports (20) of said yoke (9); each drainage channel (14) being provided with a valve (12) adapted to close the drainage channel in response to an overpressure in the suction / discharge orifice (20) so that, in the direction of rotation from the pump, the interior space of the housing (17) is in communication through one of the drainage channels (14) with the suction pipe (A); while communication through the other drainage channel (14) between the discharge and the interior space (17) of the housing (6) is closed. 2. Pompe selon la revendication 1, dans laquelle le clapet (12) comporte à chaque fois un ressort de compression logé dans le canal de drainage (14) de manière à maintenir le clapet (12) dans une position ouverte par défaut.202. Pump according to claim 1, wherein the valve (12) each comprises a compression spring housed in the drainage channel (14) so as to maintain the valve (12) in an open position by default.
FR1360278A 2013-10-22 2013-10-22 HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION Withdrawn FR3012181A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1360278A FR3012181A1 (en) 2013-10-22 2013-10-22 HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION
EP20140188250 EP2865892A1 (en) 2013-10-22 2014-10-09 Hydraulic piston pump with two-way mirror distribution
US14/520,908 US20150110656A1 (en) 2013-10-22 2014-10-22 Hydraulic piston pump having distribution through a bi-directional port plate

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Application Number Priority Date Filing Date Title
FR1360278A FR3012181A1 (en) 2013-10-22 2013-10-22 HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION

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FR1360278A Withdrawn FR3012181A1 (en) 2013-10-22 2013-10-22 HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION

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EP (1) EP2865892A1 (en)
FR (1) FR3012181A1 (en)

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EP3499033A1 (en) 2017-12-14 2019-06-19 Hydro Leduc Hydraulic pump with crimped spheres

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CN105423104B (en) * 2015-12-24 2023-06-13 衢州学院 Self-pressurization type dynamic-static pressure lubrication type valve plate

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FR2965311A1 (en) * 2010-09-29 2012-03-30 Hydro Leduc HYDRAULIC DISTRIBUTION DEVICE USING A DOUBLE-SENSE PUMP WITH VARIABLE FLOW RATE
FR2988143A1 (en) * 2012-03-19 2013-09-20 Hydro Leduc HYDRAULIC MOTOR WITH INTERNAL DRAINAGE

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