US20160273525A1 - Hydraulic axial piston pump having a floating rotatory drum - Google Patents

Hydraulic axial piston pump having a floating rotatory drum Download PDF

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Publication number
US20160273525A1
US20160273525A1 US15/036,409 US201315036409A US2016273525A1 US 20160273525 A1 US20160273525 A1 US 20160273525A1 US 201315036409 A US201315036409 A US 201315036409A US 2016273525 A1 US2016273525 A1 US 2016273525A1
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US
United States
Prior art keywords
drum
mouths
cylinders
strips
pressure
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.)
Abandoned
Application number
US15/036,409
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English (en)
Inventor
Antonio Parés CRIVILLÉ
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.)
ECO-SISTEMS WATERMAKERS SL
Original Assignee
ECO-SISTEMS WATERMAKERS SL
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 SL filed Critical ECO-SISTEMS WATERMAKERS SL
Assigned to ECO-SISTEMS WATERMAKERS, S.L. reassignment ECO-SISTEMS WATERMAKERS, S.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CRIVILLÉ, ANTONIO PARES
Publication of US20160273525A1 publication Critical patent/US20160273525A1/en
Abandoned 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
    • 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 a hydraulic axial piston pump having a floating rotatory drum, which can mainly be applied in seawater reverse osmosis desalination systems.
  • a number of documents relate to axial piston pumps intended for being used in equipment, for example seawater desalinating equipment, requiring for operation the addition of a primary liquid at a high pressure, propelled by the axial piston pump, and returning a secondary liquid at a pressure that is slightly lower than the feed pressure; said axial piston pumps incorporating means for harnessing the energy of the secondary liquid that is rejected or returned by the equipment in question.
  • the primary liquid is seawater supplied to the osmosis membranes at a high pressure
  • the secondary liquid is the reject water with a high salt content supplied by the osmosis membrane at pressure that is lower than the pressure of the primary liquid.
  • Energy-harnessing axial piston pumps described in said documents generally comprise a housing in which a rotatory drum is housed, said drum being provided with a drive shaft for operation by means of an external motor, and with a plurality of cylinders arranged in circular fashion around the geometric axis of said drum and communicated at their ends by first inlet and outlet mouths of a primary liquid and second inlet and outlet mouths of a secondary liquid; said first and second mouths being defined at first and second ends of the rotatory drum.
  • Pistons are mounted axially in the cylinders of the drum and prolonged in rods projecting through a second end of the drum and ending in supporting shoes on a fixed inclined plate, such that when the drum rotates said pistons establish in an alternating manner a forward and backward movement inside the cylinders.
  • These pumps comprise first and second fluid-distributing plates facing opposite ends of the drum, provided with openings suitably distributed for establishing in an alternating manner, during rotation of the drum, the connection between first mouths of the cylinders and the first inlet and first outlet of primary liquid of the housing; and the connection between second mouths of the cylinders and the second inlet and second outlet of the secondary liquid; said connections being established such that it is synchronized with the direction of movement of the pistons inside the cylinders.
  • a common problem in pumps of this type is determined by the need to form a sealed closure between the opposite ends of the rotatory drum and the corresponding fluid-distributing plates that remain stationary.
  • This lateral tilt or pitch of the drum causes the opposite ends thereof to exert, at diametrically opposite points, excessive pressure against the respective fluid-distributing plates and to be spaced, at diametrically opposite points with respect to the aforementioned points, from said distributing plates, providing liquid leakage areas.
  • the primary liquid gains access to the inner area of the cylinders through the first inlet mouth in order to be propelled towards the first outlet mouth during the forward movement of the pistons; whereas the secondary liquid gains access to the rear area of the cylinders through the second inlet mouth and collaborates in the forward movement of the pistons before being expelled through the second outlet mouth during the backward movement of said pistons.
  • the hydraulic axial piston pump having a floating rotatory drum object of this invention, which is of the aforementioned type, has constructive particularities which seek to assure a sealed closure between the opposite ends of the rotatory drum and fluid-distributing plates by means of the interposition, between a first end of the drum and the first distributing plate and between a second end of the drum and the second distributing plate, of first and second strips rotating together with the drum and allowing a floating assembly or being mounted with certain clearance of the rotatory drum in both the longitudinal direction and the axial direction, maintaining said sealing in the closure.
  • Another objective of the invention is to achieve cancelling out 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 objective of the invention is to achieve the operation in the axial direction of the strips responsible for forming the sealed closure between the ends of the drum and the distributing plates with the collaboration of the actual pressures of the primary and secondary liquids.
  • the first and second strips rotating together with the drum and responsible for forming a sealed closure against the fluid-distributing plates have openings facing the first and second mouths of the drum and coupling means suitable for allowing movement of the first and second strips in the axial direction with respect to the drum, and the head-on actuation of said strips against the respective distributing plates, said strips forming a sealed closure between the ends of the drum and the respective distributing plates.
  • the openings of the strips are peripherally prolonged in sleeves suitable for being housed in the first and second mouths of the drum with the interposition of sealing elements, allowing a certain tilt or misalignment of the drum, and for receiving, by action of the pressure of the primary and secondary liquids, a thrust that axially moves said strips against the distributing plates.
  • Said sleeves are also suitable for receiving, by action of the pressure of the primary and secondary liquids, axial thrusts which move the first and second strips head-on against the respective distributing plates, said strips forming a sealed closure between the opposite ends of the drum and the respective distributing plates.
  • Another relevant feature of the invention consists of the surfaces of the drum intended for coming into contact with the primary and secondary liquids being suitably arranged and sized so that the resultant of the forces generated by the pressure of the primary and secondary liquids on the drum have a zero component in the axial direction. The drum therefore remains balanced.
  • the invention comprises springs, oriented in the axial direction and suitable to assure a certain pressure of said strips against the respective distributing plates, between a first end of the drum and the first strip, and between a second end of the drum and the second strip.
  • this pump also has features that seek to achieve balance of the drum in the axial direction, preventing the forces caused by the pressures of the primary liquid and secondary liquid on the drum from tending to move it in the axial direction.
  • the first inlet and outlet mouths of the primary liquid are axially aligned with the cylinders of the drum and have diameters coinciding with those of said cylinders for preventing the pressure of the primary liquid from producing a thrusting force on the drum in the axial direction.
  • the second inlet and outlet mouths of the secondary liquid are connected to the cylinders of the drum by means of suitably shaped and sized conduits so that the resultant of the set of forces generated by the pressure of the secondary liquid on the drum has a zero component in the axial direction.
  • FIG. 1 shows a schematic elevational view of an embodiment of the hydraulic axial piston pump having a floating rotatory 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 a primary liquid, and a second inlet ( 13 ) and a second outlet ( 14 ) of a secondary liquid.
  • the rotatory drum ( 2 ) is arranged inside the housing ( 1 ) and can be operated by a drive element (not depicted) through the drive shaft ( 21 ).
  • the drum ( 2 ) has a plurality of cylinders ( 22 ) arranged in circular fashion around its geometric axis.
  • the cylinders ( 22 ) are communicated with first inlet and outlet mouth ( 23 ) of the primary liquid and with a second inlet and outlet mouth ( 24 ) of the secondary liquid.
  • Pistons ( 3 ) are mounted in the cylinders ( 22 ) and prolonged at one of their ends in rods ( 31 ) going through openings made on the rear surface of the cylinders ( 22 ) and projecting from the drum ( 2 ), and ending in respective shoes ( 32 ) acting on a fixed inclined plate ( 4 ).
  • the pump comprises first and second liquid-distributing plates ( 5 a, 5 b ) facing the respective ends of the drum ( 2 ) and provided with openings for the alternating connection between the first mouth ( 23 ) of the cylinders and the first inlet ( 11 ) and the first outlet ( 12 ) of primary liquid, and the alternating connection between the second mouth ( 24 ) of the cylinders ( 22 ) and the second inlet ( 13 ) and the second outlet ( 14 ) of secondary liquid during rotation of the drum ( 2 ).
  • first mouth ( 23 ) and second mouth ( 24 ) facing the inlets and outlets of primary liquid and secondary liquid is synchronized with the alternating axial movement of the pistons ( 3 ) as they move over the inclined plate ( 4 ).
  • First and second closure strips ( 6 a, 6 b ) rotating together with the drum ( 2 ) are mounted between the opposite ends of the drum and the respective distributing plates ( 5 a, 5 b ) to form an effective closure between said elements.
  • said strips ( 6 a, 6 b ) are provided with openings prolonged along the periphery in sleeves ( 61 and 62 ) coupled in the first mouths ( 23 ) and the second mouths ( 24 ) of the drum, respectively, with the interposition of sealing elements ( 7 ) depicted as O-ring seals.
  • Springs ( 8 ) pressing said strips ( 6 a, 6 b ) against respective distributing plates ( 5 a, 5 b ), contributing to the formation of a sealed closure, are arranged between the opposite ends of the drum ( 2 ) and the closure strips ( 6 a, 6 b ).
  • 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 from transmitting a thrusting force in the axial direction to the drum ( 2 ).
  • the second inlet and outlet mouths ( 24 ) of the secondary liquid are connected to the corresponding cylinders ( 22 ) by means of respective conduits ( 25 ), the second mouths ( 24 ) having a section identical to that end surface of the corresponding cylinder ( 22 ) which is exposed to the pressure of the secondary liquid, such that the set of forces generated by the pressure of the secondary liquid on the drum has a zero component in the axial direction, as do the forces generated by the pressure of the primary liquid, so the drum ( 2 ) is kept balanced during the operation of the pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US15/036,409 2013-11-13 2013-11-13 Hydraulic axial piston pump having a floating rotatory drum Abandoned US20160273525A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2013/000251 WO2015071503A1 (es) 2013-11-13 2013-11-13 Bomba hidráulica de pistones axiales con tambor giratorio flotante

Publications (1)

Publication Number Publication Date
US20160273525A1 true US20160273525A1 (en) 2016-09-22

Family

ID=53056818

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/036,409 Abandoned US20160273525A1 (en) 2013-11-13 2013-11-13 Hydraulic axial piston pump having a floating rotatory drum

Country Status (5)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2835102A1 (es) * 2019-12-19 2021-06-21 Danfoss As Máquina de pistón axial hidráulico
ES2835079A1 (es) * 2019-12-19 2021-06-21 Danfoss As Conjunto de placa de válvulas

Citations (5)

* 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
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
EP1508361A1 (en) * 2003-08-22 2005-02-23 Danfoss A/S A pressure exchanger
US7799221B1 (en) * 2008-01-15 2010-09-21 Macharg John P Combined axial piston liquid pump and energy recovery pressure exchanger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585901A (en) * 1969-02-19 1971-06-22 Sundstrand Corp Hydraulic pump
BE791148A (fr) * 1971-11-13 1973-03-01 Plessey Handel Investment Ag Perfectionnements relatifs a des dispositifs de reglage du debit de pompes a cylindres axiaux
GB1482817A (en) * 1974-02-01 1977-08-17 Mitsubishi Heavy Ind Ltd Hydraulic pump of the axial piston type
JPS6165080A (ja) * 1984-09-05 1986-04-03 Hitachi Constr Mach Co Ltd 液圧回転機
KR100254182B1 (ko) * 1992-01-15 2000-04-15 매리 제이 캘라한 밀봉 배럴판을 갖는 축방향 피스톤식 유체 이동 유니트
DE102008046168B4 (de) 2008-09-06 2010-06-24 Danfoss A/S Axialkolbenpumpe und Umkehrosmoseeinrichtung

Patent Citations (6)

* 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
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
EP1508361A1 (en) * 2003-08-22 2005-02-23 Danfoss A/S A pressure exchanger
US7799221B1 (en) * 2008-01-15 2010-09-21 Macharg John P Combined axial piston liquid pump and energy recovery pressure exchanger
US8419940B2 (en) * 2008-01-15 2013-04-16 Ocean Pacific Technologies Combined axial piston liquid pump and energy recovery pressure exchanger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2835102A1 (es) * 2019-12-19 2021-06-21 Danfoss As Máquina de pistón axial hidráulico
ES2835079A1 (es) * 2019-12-19 2021-06-21 Danfoss As Conjunto de placa de válvulas
US11555488B2 (en) 2019-12-19 2023-01-17 Danfoss A/S Valve plate assembly

Also Published As

Publication number Publication date
EP3070329B1 (en) 2019-02-27
WO2015071503A1 (es) 2015-05-21
ES2739073T3 (es) 2020-01-28
DK3070329T3 (da) 2019-06-03
EP3070329A1 (en) 2016-09-21
EP3070329A4 (en) 2017-06-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ECO-SISTEMS WATERMAKERS, S.L., SPAIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CRIVILLE, ANTONIO PARES;REEL/FRAME:038580/0013

Effective date: 20160510

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION