WO2015071503A1 - Pompe hydraulique à pistons axiaux et à tambour rotatif flottant - Google Patents

Pompe hydraulique à pistons axiaux et à tambour rotatif flottant Download PDF

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Publication number
WO2015071503A1
WO2015071503A1 PCT/ES2013/000251 ES2013000251W WO2015071503A1 WO 2015071503 A1 WO2015071503 A1 WO 2015071503A1 ES 2013000251 W ES2013000251 W ES 2013000251W WO 2015071503 A1 WO2015071503 A1 WO 2015071503A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum
plates
mouths
cylinders
liquid
Prior art date
Application number
PCT/ES2013/000251
Other languages
English (en)
Spanish (es)
Inventor
Antonio PARÉS CRIVILLÉ
Original Assignee
Eco-Sistems Watermakers, S.L.
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 Eco-Sistems Watermakers, S.L. filed Critical Eco-Sistems Watermakers, S.L.
Priority to PCT/ES2013/000251 priority Critical patent/WO2015071503A1/fr
Priority to US15/036,409 priority patent/US20160273525A1/en
Priority to EP13897490.2A priority patent/EP3070329B1/fr
Priority to ES13897490T priority patent/ES2739073T3/es
Priority to DK13897490.2T priority patent/DK3070329T3/da
Publication of WO2015071503A1 publication Critical patent/WO2015071503A1/fr

Links

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
    • F04B5/00—Machines or pumps with differential-surface pistons
    • F04B5/02—Machines or pumps with differential-surface pistons with double-acting 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
    • 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
    • F04B1/124—Pistons
    • F04B1/126—Piston shoe retaining 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
    • F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
    • 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
    • F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
    • F04B1/2028—Bearings
    • 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
    • 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
    • F04B1/2064—Housings
    • 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
    • F04B1/2064—Housings
    • F04B1/2071—Bearings for cylinder barrels
    • 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

Definitions

  • the present invention relates to an axial piston hydraulic pump with floating rotating drum; Applicable mainly in seawater desalination plants using reverse osmosis.
  • axial piston pumps intended for use in equipment, for example seawater desalination, which require the provision of a primary high-pressure liquid for operation, which is driven by the axial piston pump, and that return a secondary liquid at a pressure slightly lower than the supply; incorporating the aforementioned axial piston pumps means for harnessing the energy of the secondary liquid rejected or returned by the equipment in question.
  • the primary liquid is constituted by seawater that is supplied at high pressure to the osmosis membranes; while the secondary liquid is constituted by the rejection water with a high salt content supplied by the osmosis membrane at a pressure lower than that of the primary liquid.
  • the axial piston pumps with energy use described in said documents generally comprise a housing in which a rotating drum is provided provided with a drive shaft for actuation by an external motor, and a plurality of cylinders arranged circularly around to the geometric axis of said drum and communicated at its ends by first mouths of entry and exit of primary liquid and second mouths of entry and exit of secondary liquid; said first and second mouths being defined at a first end and a second end of the rotating drum.
  • pistons are extended axially that extend into rods that protrude through a second end of the drum and that end in support skates on a fixed inclined plate, so that when rotating the drum said pistons alternately describe a forward and reverse movement inside the cylinders.
  • These pumps comprise a first plate and a second fluid distributor plate, facing opposite ends of the drum, provided with conveniently distributed holes for alternately establishing, during the rotation of the drum, the connection of the first mouths of the cylinders with the first inlet and first outlet of primary liquid from the housing; and the connection of the second mouths of the cylinders with the second inlet and the second outlet of secondary liquid; said connections being established synchronously with the direction of movement of the pistons inside the cylinders.
  • a general problem with this type of pump is determined by the need to establish a tight seal between the opposite ends of the rotating drum and the corresponding fluid distribution plates that remain static.
  • This tilting or lateral pitching of the drum causes the opposite ends thereof, at diametrically opposite points, to exert excessive pressure against the respective fluid distribution plates and at the diametrically opposite points thereof they distance themselves from said distribution plates providing leakage areas of liquid.
  • the primary liquid accesses through the first inlet to the anterior zone of the cylinders to be propelled to the first outlet during the advance of the pistons; while the secondary liquid enters through the second inlet to the rear area of the cylinders and collaborates in the forward movement of the pistons before being expelled through the second outlet during the retraction of said pistons.
  • the axial piston hydraulic pump with floating rotating drum object of this invention, being of the type mentioned above, has constructional features oriented to guarantee a tight seal between the opposite ends of the rotating drum and the fluid distribution plates by interposing between a first end of the drum and the first distributor plate and between a second end of the drum and the second distributor plate of a first and a second plate that rotate together with the drum and allow a floating assembly or with a certain slack of the rotating drum both in the longitudinal direction as in the axial direction maintaining said seal tightness.
  • Another object of the invention is to achieve the cancellation of the horizontal components of the forces produced by the pressures of the primary and secondary liquids on the drum, regardless of the value of said pressures.
  • Another object of the invention is to achieve the axial direction of the plates responsible for establishing the tight seal between the ends of the drum and the distribution plates with the collaboration of the primary and secondary liquid pressures themselves.
  • the first and second plates that rotate together with the drum, and are responsible for establishing a tight seal against the fluid distribution plates have holes facing the first and second mouths of the drum, and suitable coupling means to allow a displacement of the first and the second plate in axial direction with respect to the drum and the frontal action of said plates against the respective distributor plates, said plates establishing a tight seal between the ends of the drum and the respective distribution plates.
  • the holes of the plates are peripherally extended in sleeves suitable to be housed in the first and second mouths of the drum with the interposition of sealing elements; allowing a certain tilting or misalignment of the drum, and to receive, as a result of the pressure of the primary and secondary liquids, a thrust that axially displaces said plates against the distributor plates.
  • Said sleeves are also suitable for receiving, by the effect of the pressure of the primary and secondary liquids, axial thrusts that move the first and the second plate frontally against the respective distributor plates, said plates establishing a tight seal between the opposite ends of the drum and the respective distribution plates.
  • Another relevant feature of the invention is that the surfaces of the drum intended to contact the primary and secondary liquids have a suitable arrangement and dimensions so that the result of the forces generated by the pressure of the primary and secondary liquids on the drum have a null component in axial direction. In this way the drum is kept balanced.
  • the invention comprises between the first end of the drum and the first plate, and between a second end of the drum and the second plate, springs oriented in the axial direction and suitable to guarantee a certain pressure of said plates against the respective distribution plates.
  • springs are effective especially during the initial start-up phase of the pump in which the first liquid and the second liquid are without pressure. These springs also contribute initially to the centering of the drum with respect to the first and the second plate.
  • this pump also has characteristics aimed at achieving a balanced tabor in the axial direction preventing the forces produced by the pressures of primary liquid and secondary liquid on the drum tend to move it in one direction or another in the axial direction .
  • the first inlet and outlet mouths of the primary liquid are axially aligned with the drum cylinders and have diameters coinciding with those of said cylinders to prevent the pressure of the primary liquid from producing on the drum a thrust force in axial direction.
  • the second inlet and outlet mouths of secondary liquid are connected to the drum cylinders by means of suitable geometry and dimensions conduits so that the result of the set of forces generated by the pressure of the secondary liquid on the drum has a component zero in axial direction.
  • FIG. 1 shows a schematic elevational view of an embodiment of the axial piston hydraulic pump with floating rotating drum, according to the invention, sectioned by a vertical plane.
  • FIG. 2 shows an exploded view of the different internal elements of the pump.
  • the pump comprises a housing (1) with a first inlet (11) and a first outlet (12) of primary liquid, and with a second inlet (13) and a second outlet (14) of secondary liquid
  • the rotating drum (2) is operable by a motor element (not shown) through the drive shaft (21).
  • the drum (2) has a plurality of cylinders (22) arranged circularly around its geometric axis.
  • the cylinders (22) are communicated with the first mouth (23) of inlet and outlet of primary liquid and with a second mouth (24) of inlet and outlet of secondary liquid.
  • pistons (3) extended by one of its ends in some rods (31) that pass through holes made in the rear surface of the cylinders (22) and protrude from the drum (2 ) and finish on respective skates (32) acting on a fixed inclined plate (4).
  • the pump comprises a first and a second liquid distribution plate (5a, 5b) facing the respective ends of the drum (2) and provided with holes for the alternative connection of the first mouth (23) of the cylinders with the first inlet (11) and the first outlet (12) of primary liquid, and the alternative connection of the second mouth (24) of the cylinders (22) with the second inlet (13) and the second outlet (14) of secondary liquid during the drum rotation (2).
  • the confrontation of the first mouth (23) and the second mouth (24) with the inputs and outputs of primary and secondary liquid is synchronized with the reciprocating axial movement of the pistons (3), when moving on the inclined plate ( 4).
  • a first and a second closing plate (6a, 6b) which rotate together with the drum (2) are mounted between said elements. .
  • said plates (6a, 6b) are provided with holes extended by their periphery in sleeves (61 and 62) respectively coupled in the first mouths (23) and the second mouths (23) of the drum with the interposition of sealing elements (7) represented by O-rings, These couplings allow a certain tilting or pitching of the drum (2) while the plates (6a, 6b) are kept parallel to the first and second distributor plate (5a, 5b), exerting a closure against them due to the push of the primary and secondary liquids against the ends of said sleeves (61 and 62) of the plates (6a and 6b).
  • the first mouths (23) because the first inlet and outlet mouths of the primary liquid are axially aligned with the cylinders (22) of the drum and have diameters coinciding with those of said cylinders (22), preventing the pressure of the primary liquid transmit a thrust force in the axial direction to the drum (2).
  • the second mouths (24) for entering and exiting the secondary liquid are connected to the corresponding cylinders (22) by means of respective ducts (25) with the second mouths (24) presenting a section equal to that corresponding end surface of the cylinder (22) which it is exposed to the pressure of the secondary liquid, so that the set of forces generated by the pressure of the secondary liquid on the drum has a zero component in axial direction, as well as those generated by the pressure of the primary liquid, whereby it is possible to keep the drum (2) balanced during the operation of the pump.

Landscapes

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

Abstract

La pompe selon l'invention comprend un corps (1); un tambour (2) avec des cylindres dans lesquels sont montés des pistons (3) qui reposent sur des patins (32) d'appui sur un plan incliné (4) fixe; et une première et une seconde plaque (5a,5b) de distribution de fluide comportant des orifices (51,52) qui établissent alternativement le raccordement de plusieurs premières ouvertures (23) de cylindres (22) avec plusieurs premières entrée (11) et sortie (12) de liquide primaire et de secondes ouvertures (24) avec plusieurs secondes entrée (13) et sortie (14) de liquide secondaire. La pompe comprend une première et une seconde platine (6a,6b) disposées entre le tambour (2) et les plaques de distribution (5a,5b), qui peuvent se déplacer de manière longitudinale et qui permettent un certain basculement du tambour, formant une fermeture étanche entre les extrémités du tambour (2) et les plaques de distribution (5a,5b).
PCT/ES2013/000251 2013-11-13 2013-11-13 Pompe hydraulique à pistons axiaux et à tambour rotatif flottant WO2015071503A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/ES2013/000251 WO2015071503A1 (fr) 2013-11-13 2013-11-13 Pompe hydraulique à pistons axiaux et à tambour rotatif flottant
US15/036,409 US20160273525A1 (en) 2013-11-13 2013-11-13 Hydraulic axial piston pump having a floating rotatory drum
EP13897490.2A EP3070329B1 (fr) 2013-11-13 2013-11-13 Pompe hydraulique à pistons axiaux et à tambour rotatif flottant
ES13897490T ES2739073T3 (es) 2013-11-13 2013-11-13 Bomba hidráulica de pistones axiales con tambor giratorio flotante
DK13897490.2T DK3070329T3 (da) 2013-11-13 2013-11-13 Hydraulisk aksial stempelpumpe med en svævende ophængt roterende tromle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2013/000251 WO2015071503A1 (fr) 2013-11-13 2013-11-13 Pompe hydraulique à pistons axiaux et à tambour rotatif flottant

Publications (1)

Publication Number Publication Date
WO2015071503A1 true WO2015071503A1 (fr) 2015-05-21

Family

ID=53056818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2013/000251 WO2015071503A1 (fr) 2013-11-13 2013-11-13 Pompe hydraulique à pistons axiaux et à tambour rotatif flottant

Country Status (5)

Country Link
US (1) US20160273525A1 (fr)
EP (1) EP3070329B1 (fr)
DK (1) DK3070329T3 (fr)
ES (1) ES2739073T3 (fr)
WO (1) WO2015071503A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019135086A1 (de) 2019-12-19 2021-06-24 Danfoss A/S Ventilplattenanordnung
DE102019135083A1 (de) * 2019-12-19 2021-06-24 Danfoss A/S Hydraulische Axialkolbenmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES408674A1 (es) * 1971-11-13 1975-11-01 Plessey Handel Investment Ag Perfeccionamientos en las bombas de cilindros axiles.
US4007663A (en) * 1974-02-01 1977-02-15 Mitsubishi Kogyo Kabushiki Kaisha Hydraulic pump of the axial piston type
JPS58128477A (ja) * 1982-01-25 1983-08-01 Hitachi Constr Mach Co Ltd 液圧回転機
US5279205A (en) * 1992-01-15 1994-01-18 Caterpillar Inc. Axial piston fluid translating unit with sealed barrel plate
WO2005018782A1 (fr) * 2003-08-22 2005-03-03 Danfoss A/S Echangeur de pression
WO2010025729A1 (fr) 2008-09-06 2010-03-11 Danfoss A/S Machine à pistons axiaux et dispositif d'osmose inverse
US7799221B1 (en) 2008-01-15 2010-09-21 Macharg John P Combined axial piston liquid pump and energy recovery pressure exchanger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431747A (en) * 1966-12-01 1969-03-11 Hadi T Hashemi Engine for exchanging energy between high and low pressure systems
US3585901A (en) * 1969-02-19 1971-06-22 Sundstrand Corp Hydraulic pump
DE2504562C3 (de) * 1974-02-01 1981-12-17 Mitsubishi Jukogyo K.K., Tokyo Hydrostatische Axialkolbenpumpe
JPS6165080A (ja) * 1984-09-05 1986-04-03 Hitachi Constr Mach Co Ltd 液圧回転機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES408674A1 (es) * 1971-11-13 1975-11-01 Plessey Handel Investment Ag Perfeccionamientos en las bombas de cilindros axiles.
US4007663A (en) * 1974-02-01 1977-02-15 Mitsubishi Kogyo Kabushiki Kaisha Hydraulic pump of the axial piston type
JPS58128477A (ja) * 1982-01-25 1983-08-01 Hitachi Constr Mach Co Ltd 液圧回転機
US5279205A (en) * 1992-01-15 1994-01-18 Caterpillar Inc. Axial piston fluid translating unit with sealed barrel plate
WO2005018782A1 (fr) * 2003-08-22 2005-03-03 Danfoss A/S Echangeur de pression
US7799221B1 (en) 2008-01-15 2010-09-21 Macharg John P Combined axial piston liquid pump and energy recovery pressure exchanger
WO2010025729A1 (fr) 2008-09-06 2010-03-11 Danfoss A/S Machine à pistons axiaux et dispositif d'osmose inverse

Also Published As

Publication number Publication date
EP3070329A1 (fr) 2016-09-21
ES2739073T3 (es) 2020-01-28
EP3070329A4 (fr) 2017-06-14
DK3070329T3 (da) 2019-06-03
EP3070329B1 (fr) 2019-02-27
US20160273525A1 (en) 2016-09-22

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