EP2674622A2 - Hydraulic pump with axial pistons which can operate in both directions - Google Patents
Hydraulic pump with axial pistons which can operate in both directions Download PDFInfo
- Publication number
- EP2674622A2 EP2674622A2 EP13170973.5A EP13170973A EP2674622A2 EP 2674622 A2 EP2674622 A2 EP 2674622A2 EP 13170973 A EP13170973 A EP 13170973A EP 2674622 A2 EP2674622 A2 EP 2674622A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bias
- hydraulic pump
- pump
- shaft
- plates
- 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.)
- Granted
Links
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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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
-
- 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
- F04B1/14—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 stationary cylinders
- F04B1/141—Details or component parts
-
- 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
- F04B1/14—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 stationary cylinders
- F04B1/16—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 stationary cylinders having two or more sets of cylinders or pistons
-
- 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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0057—Mechanical driving means therefor, e.g. cams
Definitions
- the present invention relates to a hydraulic pump with axial pistons, in particular of low or very low displacement, which can operate in both directions of rotation so as to actuate a hydraulic receiver in one direction or the other.
- Hydraulic pumps inclined plate, or bias plate, operating axial pistons have been known for a long time.
- the present invention relates to an axial piston pump which can provide a flow in both directions of rotation and is suitable for very low the displacement of this pump may be of the order of 40 mm 3 and even less.
- the pump is characterized in that it comprises a housing, a common drive shaft rotatably mounted relative to the housing, two bias plates carried by the common drive shaft, these two bias plates being symmetrical and opposite and each comprising a feed lunule, a respective hollow piston bearing on each bias plate by means of a sliding pad and slidable in a respective cylinder connected to the housing, the lunette of the bias plate being at each disposed so as to pass over the hollow piston during a suction phase of the hollow piston, each cylinder being provided with a nonreturn valve on the discharge side; so that only one of the two bias plates provides a flow when the drive shaft rotates in one direction, the other bias plate providing a flow when the shaft rotates in the other direction, thereby achieving a pump of very small displacement delivering a flow on one of the two discharge ports of the pump and this depending on the direction of rotation of the pump.
- the pump has two separate discharge ports, one for each flow, and a check valve by pump piston.
- the hydraulic pump comprises two discharge ports, one discharging the liquid pressurized by one of the bias plates, the other pushing the liquid pressurized by the other bias plate; the supply of liquid being done either by a supply port opening into the volume where oscillates one or the other bias plates, or through the bearing bearing said plates bias.
- the drive shaft 100 carries two bias plates 101 and 102 which are symmetrical and opposite slopes, each having a single lunette 106 and 107, which are in diametrically opposite positions.
- Pistons 103 are held in abutment against bias plate 101 by springs 104 by means of sliding shoes 105.
- pistons 103 are held in abutment against plate 102 by springs 104 and via Slip pads 105.
- the plate 101 rotates in a chamber 112 filled with hydraulic fluid and the plate 102 rotates in a similar chamber 113.
- the liquid discharged under pressure by the effect of the pistons actuated by the plate 101 passes through the anti-rotation valve. 108 and out through the orifice 110.
- the liquid discharged under pressure by the effect of the plate 102 passes through the non-return valve 109 and out through the orifice 111.
- the pump In use, the pump is intended to be immersed in a reservoir of hydraulic fluid, for example within a petroleum drill pipe.
- the chambers 112 and 113 are filled with hydraulic fluid either by unrepresented holes in the pump housing opening into these chambers, or through the bearings carrying the shaft 100.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
La présente invention est relative à une pompe hydraulique à pistons axiaux, notamment de faible ou très faible cylindrée, pouvant fonctionner dans les deux sens de rotation de façon à pouvoir actionner un récepteur hydraulique dans un sens ou dans l'autre.The present invention relates to a hydraulic pump with axial pistons, in particular of low or very low displacement, which can operate in both directions of rotation so as to actuate a hydraulic receiver in one direction or the other.
Il s'avère nécessaire de pouvoir actionner, par exemple dans un tube de forage pétrolier, un vérin hydraulique à double effet et cela sans avoir à disposer un distributeur dans le circuit hydraulique et/ou tout en logeant la pompe dans un volume très faible.It is necessary to be able to actuate, for example in a petroleum drill pipe, a double-acting hydraulic cylinder and this without having to have a distributor in the hydraulic circuit and / or while housing the pump in a very small volume.
Pour cela, il est avantageux d'employer la technologie des pompes à plateau biais et pistons axiaux.For this, it is advantageous to use the technology of bias plate pumps and axial pistons.
Les pompes hydrauliques à plateau incliné, ou plateau biais, actionnant des pistons axiaux sont connues depuis fort longtemps.Hydraulic pumps inclined plate, or bias plate, operating axial pistons have been known for a long time.
En particulier il est connu d'employer des pistons creux, qui prennent appui sur un plateau biais par l'intermédiaire de patins de glissement au travers desquels chaque piston est alimenté en liquide , lorsque son patin de glissement passe sur un sillon arqué, appelé lunule, gravé sur la face du plateau biais ; le refoulement du liquide ainsi aspiré à l'intérieur du piston creux se faisant par un clapet anti-retour disposé à l'extrémité du cylindre dans lequel coulisse le piston.In particular it is known to use hollow pistons, which are supported on a bias plate by means of sliding pads through which each piston is supplied with liquid, when its sliding pad passes over an arcuate groove, called a lunula engraved on the side of the bias plate; the discharge of the liquid thus sucked into the hollow piston is by a non-return valve disposed at the end of the cylinder in which the piston slides.
Il est connu d'employer pour ce genre de pompe ce que l'on appelle une distribution par glace, les pistons étant portés par un barillet entrainé en rotation, la face arrière dudit barillet étant appliquée par un ressort contre une glace, constituée par un disque muni de perçages arqués.It is known to use for this type of pump what is called an ice distribution, the pistons being carried by a cylinder rotated, the rear face of said cylinder being applied by a spring against an ice, constituted by a disc with bowed holes.
Il s'avère cependant que cette technique, largement utilisée par le demandeur n'est pas utilisable pour des pompes de cylindrée inférieure à 4 à 5 cm3, parce que, dans ce cas, pour éviter que la pression de refoulement ne sépare la face arrière du barillet de la glace de distribution, il faut donner auxdites lunules une section tellement faible qu'il est, dans la pratique, impossible de les usiner. De plus, la très petite taille des lunules condamne la pompe à avoir une aspiration très réduite, ce qui n'est pas forcément compatible avec l'application souhaitée de la pompe.However, it turns out that this technique, widely used by the applicant is not usable for pumps of cubic capacity less than 4 to 5 cm 3 , because, in this case, to prevent the discharge pressure does not separate the face rear of the barrel of the dispensing ice, it is necessary to give said lunules a section so small that it is, in practice, impossible to machine them. In addition, the very small size of the loops condemns the pump to have a very low suction, which is not necessarily compatible with the desired application of the pump.
La présente intervention concerne une pompe à pistons axiaux pouvant fournir un débit dans les deux sens de rotation et convenant pour des très faibles cylindrées, la cylindrée de cette pompe pouvant être de l'ordre de de 40 mm3 et même moins.The present invention relates to an axial piston pump which can provide a flow in both directions of rotation and is suitable for very low the displacement of this pump may be of the order of 40 mm 3 and even less.
Selon la présente invention la pompe est caractérisée par le fait qu'elle comporte un carter, un arbre d'entrainement commun monté rotatif par rapport au carter, deux plateaux biais portés par l'arbre d'entrainement commun, ces deux plateaux biais étant symétriques et opposés et comportant chacun une lunule d'alimentation, un piston creux respectif prenant appui sur chaque plateau biais par l'intermédiaire d'un patin de glissement et apte à coulisser dans un cylindre respectif lié au carter, la lunule du plateau biais étant à chaque fois disposée de manière à passer sur le piston creux pendant une phase d'aspiration du piston creux, chaque cylindre étant muni d'un clapet anti-retour du côté refoulement; de telle sorte que seul un des deux plateaux biais fournisse un débit lorsque l'arbre d'entraînement tourne dans un sens, l'autre plateau biais fournissant un débit lorsque l'arbre tourne dans l'autre sens, ce qui permet de réaliser une pompe de très faible cylindrée délivrant un débit sur l'un des deux orifices de refoulement de la pompe et cela en fonction du sens de la rotation de la pompe.According to the present invention the pump is characterized in that it comprises a housing, a common drive shaft rotatably mounted relative to the housing, two bias plates carried by the common drive shaft, these two bias plates being symmetrical and opposite and each comprising a feed lunule, a respective hollow piston bearing on each bias plate by means of a sliding pad and slidable in a respective cylinder connected to the housing, the lunette of the bias plate being at each disposed so as to pass over the hollow piston during a suction phase of the hollow piston, each cylinder being provided with a nonreturn valve on the discharge side; so that only one of the two bias plates provides a flow when the drive shaft rotates in one direction, the other bias plate providing a flow when the shaft rotates in the other direction, thereby achieving a pump of very small displacement delivering a flow on one of the two discharge ports of the pump and this depending on the direction of rotation of the pump.
De préférence la pompe comporte deux orifices distincts de refoulement, un pour chaque débit, ainsi que un clapet anti-retour par piston de pompe.Preferably the pump has two separate discharge ports, one for each flow, and a check valve by pump piston.
Selon un mode de réalisation, la pompe hydraulique comporte deux orifices de refoulement, l'un refoulant le liquide mis en pression par l'un des plateaux biais, l'autre refoulant le liquide mis en pression par l'autre plateau biais ; l'alimentation en liquide se faisant soit par un orifice d'alimentation débouchant dans le volume où oscille l'un ou l'autre des plateaux biais, soit à travers les roulements portant lesdits plateaux biais.According to one embodiment, the hydraulic pump comprises two discharge ports, one discharging the liquid pressurized by one of the bias plates, the other pushing the liquid pressurized by the other bias plate; the supply of liquid being done either by a supply port opening into the volume where oscillates one or the other bias plates, or through the bearing bearing said plates bias.
Afin de faciliter la compréhension de la présente invention on a représenté aux dessins annexés :
-
Figure 1 une vue en coupe longitudinale d'un exemple de réalisation d'une pompe d'une cylindrée par exemple inférieure à 40 mm3 pouvant débiter selon le sens de rotation de la pompe. -
Figure 2 une vue en plan du premier plateau biais de la pompe de lafigure 1 avec une lunule gravée pour tourner dans le sens horaire. -
Figure 3 une vue en plan du deuxième plateau biais de la pompe de lafigure 1 avec une lunule gravée pour tourner dans le sens inverse horaire. - Les
figures 1 à 3 illustrent un mode de réalisation de l'invention, destiné notamment à des pompes de très faibles cylindrées.
-
Figure 1 a longitudinal sectional view of an exemplary embodiment of a pump with a displacement of, for example, less than 40 mm 3 being able to discharge in the direction of rotation of the pump. -
Figure 2 a plan view of the first plateau biased the pump thefigure 1 with an engraved lunula to turn clockwise. -
Figure 3 a plan view of the second plateau bias the pump of thefigure 1 with an engraved lunula to turn counterclockwise. - The
Figures 1 to 3 illustrate an embodiment of the invention, particularly for pumps of very small displacements.
En se reportant à ces figures, on voit que l'arbre d'entrainement 100 porte deux plateaux biais 101 et 102 qui sont symétriques et de pentes opposées, chacun comportant une seule lunule 106 et 107, qui sont dans des positions diamétralement opposées. Des pistons 103 sont maintenus en appui contre le plateau biais 101 par des ressorts 104 par l'intermédiaire de patins de glissement 105. De façon analogue, des pistons 103 sont maintenus en appui contre le plateau 102 par des ressorts 104 et par l'intermédiaire des patins de glissement 105. Le plateau 101 tourne dans une chambre 112 remplie de liquide hydraulique et le plateau 102 tourne dans une chambre analogue 113. Le liquide refoulé sous pression par l'effet des pistons actionnés par le plateau 101 traverse le clapet anti-retour 108 et sort par l'orifice 110. De façon analogue, le liquide refoulé sous pression par l'effet du plateau 102 traverse le clapet anti-retour 109 et sort par l'orifice 111.Referring to these figures, we see that the
Il en résulte que lorsque l'arbre 100 tourne dans le sens horaire c'est le plateau 101 qui débite (
Il est ainsi possible d'avoir une pompe de très faible cylindrée pouvant refouler selon le sens de rotation de la pompe.It is thus possible to have a pump of very small displacement that can pump in the direction of rotation of the pump.
En service, la pompe est destinée à être immergée dans un réservoir de liquide hydraulique, par exemple au sein d'un tube de forage pétrolier. Les chambres 112 et 113 se remplissent de liquide hydraulique soit par des perçages non représentés du carter de pompe débouchant dans ces chambres, soit à travers les roulements portant l'arbre 100.In use, the pump is intended to be immersed in a reservoir of hydraulic fluid, for example within a petroleum drill pipe. The
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 éléments.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.
Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication.In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1255552A FR2992034B1 (en) | 2012-06-14 | 2012-06-14 | HYDRAULIC PUMP WITH AXIAL PISTONS OPERATING IN BOTH SENSES |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2674622A2 true EP2674622A2 (en) | 2013-12-18 |
EP2674622A3 EP2674622A3 (en) | 2014-01-15 |
EP2674622B1 EP2674622B1 (en) | 2015-09-30 |
Family
ID=46754660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13170973.5A Not-in-force EP2674622B1 (en) | 2012-06-14 | 2013-06-07 | Hydraulic pump with axial pistons which can operate in both directions |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130336815A1 (en) |
EP (1) | EP2674622B1 (en) |
FR (1) | FR2992034B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103967731A (en) * | 2014-05-09 | 2014-08-06 | 西安交通大学 | End cam driving type axial plunger pump carrying out oil distribution by adopting flow distribution ring |
WO2023083813A1 (en) | 2021-11-12 | 2023-05-19 | Safran Aircraft Engines | Reversible hydraulic pump for setting propellor pitch, and associated hydraulic system, turboprop and aircraft |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3012181A1 (en) * | 2013-10-22 | 2015-04-24 | Hydro Leduc | HYDRAULIC PISTON PUMP WITH BI-DIRECTIONAL ICE DISTRIBUTION |
AU2020424507B2 (en) * | 2020-01-23 | 2022-09-08 | Hess Corporation | Submersible pump assembly and method for use of same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2545929A (en) * | 1949-03-31 | 1951-03-20 | Acrotorque Co | Pump |
GB851701A (en) * | 1955-07-12 | 1960-10-19 | New Patents Ltd | Hydraulic pump |
FR1162272A (en) * | 1956-10-31 | 1958-09-10 | Piston pump | |
US20040057836A1 (en) * | 2002-09-25 | 2004-03-25 | Caterpillar Inc. | Hydraulic pump circuit |
GB2454908B (en) * | 2007-11-23 | 2012-04-11 | Schlumberger Holdings | Hydraulic manifold pump |
-
2012
- 2012-06-14 FR FR1255552A patent/FR2992034B1/en not_active Expired - Fee Related
-
2013
- 2013-05-30 US US13/905,962 patent/US20130336815A1/en not_active Abandoned
- 2013-06-07 EP EP13170973.5A patent/EP2674622B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
None |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103967731A (en) * | 2014-05-09 | 2014-08-06 | 西安交通大学 | End cam driving type axial plunger pump carrying out oil distribution by adopting flow distribution ring |
CN103967731B (en) * | 2014-05-09 | 2016-02-24 | 西安交通大学 | A kind of end cam drive-type axial piston pump adopting flow ring to join oil |
WO2023083813A1 (en) | 2021-11-12 | 2023-05-19 | Safran Aircraft Engines | Reversible hydraulic pump for setting propellor pitch, and associated hydraulic system, turboprop and aircraft |
FR3129137A1 (en) | 2021-11-12 | 2023-05-19 | Safran Aircraft Engines | Reversible hydraulic pump for propeller pitch setting, hydraulic system, turboprop and associated aircraft |
Also Published As
Publication number | Publication date |
---|---|
EP2674622B1 (en) | 2015-09-30 |
US20130336815A1 (en) | 2013-12-19 |
EP2674622A3 (en) | 2014-01-15 |
FR2992034A1 (en) | 2013-12-20 |
FR2992034B1 (en) | 2014-07-18 |
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