US20140003970A1 - Axial pistons hydraulic pump able to function in one or the other rotating direction - Google Patents

Axial pistons hydraulic pump able to function in one or the other rotating direction Download PDF

Info

Publication number
US20140003970A1
US20140003970A1 US13/924,014 US201313924014A US2014003970A1 US 20140003970 A1 US20140003970 A1 US 20140003970A1 US 201313924014 A US201313924014 A US 201313924014A US 2014003970 A1 US2014003970 A1 US 2014003970A1
Authority
US
United States
Prior art keywords
valve plate
hydraulic pump
pump
drillings
symmetrical
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
US13/924,014
Other languages
English (en)
Inventor
Louis-Claude 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
Assigned to HYDRO LEDUC reassignment HYDRO LEDUC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: POREL, LOUIS-CLAUDE
Publication of US20140003970A1 publication Critical patent/US20140003970A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • F04B1/20—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
    • F04B1/2007—Arrangements for pressing the cylinder barrel against the valve plate, e.g. by fluid pressure
    • 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
    • F04B1/2035—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
    • F04B1/2042—Valves

Definitions

  • the present invention is concerning an axial pistons hydraulic pump and more particularly such a pump having a small or very small cubic cm displacement and able to function in one or the other rotating direction in order to feed an hydraulic receptor in one way or the other.
  • the swash plate and axial pistons pumps are known since a long time.
  • the object of the present invention is to bring a solution to this problem.
  • Said solution consists in a swash plate hydraulic pump able to function in both rotating directions of the kind of pump comprising a rotating barrel carrying the pistons, said barrel being pressed against a valve plate provided with two symmetrical and opposed drillings wherein said valve plate provided with two symmetrical and opposed drillings one connected with one of the output openings of the pump, the other with the other output opening is jointly linked to a double piston having two sections of equal surfaces, one of these surfaces being connected with one of the output openings of the pump, the other surface being connected with the other output opening; so that said valve plate is constantly pressed against the barrel carrying the pistons by the output pressure whatever the sense of rotation of the pump, this permitting to manufacture a small cubic cm displacement pump (particularly lower than 4 to 5 cm3) in which said symmetrical drillings have small dimensions and in which the output pressure cannot separate the barrel from the valve plate.
  • the spherical heads of the pistons are maintained against the canted face of the swash plate by a disc acted by the spring applying the barrel against the valve plate.
  • FIG. 1 is a longitudinal section of a known swash pump with a valve plate.
  • FIG. 2 is a plan view of the FIG. 1 valve plate with its two symmetrical lunulas at a slightly larger scale.
  • FIG. 3 is a longitudinal section of an example of embodiment of a pump having a cubic cm displacement lower than 4 to 5 cm3 able to discharge hydraulic fluid in both rotating directions.
  • FIG. 4 is a plan view of the valve plate of a known pump with its two lunulas whose dimensions should be determined for the pump to have a cubic cm displacement lower than 4 to 5 cm3.
  • FIG. 1 is showing a known pump comprising a shaft 1 , driving a barrel 2 inside which are reciprocating several hollow pistons 3 resting against a canted plate or swash plate 4 by means of sliding skids 5 .
  • the back side of barrel 2 is urged by a spring 9 against a disc 8 comprising two arcuate drillings 7 / 7 ′ hereafter called lunulas.
  • Hydraulic liquid is drawn in the pistons through one of the lunulas and discharged through the other one.
  • a groove 17 carved onto the surface of disc 8 allows each lunula 7 / 7 ′ to communicate with inside space 18 of the pump housing.
  • Opening 10 of the pump is intake opening when pump is rotating clockwise, opening 11 being discharge opening and reversely when pump is rotating anticlockwise.
  • FIG. 2 illustrates that the interior space of each lunula may be schematically divided into three zones: a central zone 7 a ; an external zone 7 c and a medium zone 7 b.
  • zone 7 a the pressure is the discharge pressure P; in zone 7 c the pressure is null or equal to the pressure into the housing of the pump; in zone 7 b varies from P to 0 or to the pressure inside the housing of the pump.
  • piston diameter is about 6 to 8 mm.
  • FIG. 4 illustrates what is to be obtained, To get this inventor has created two artificial surfaces constituted by the double piston 81 / 82 which press upon valve plate 80 . Such artificial pressure is balanced by increasing the surface of lunulas 70 / 70 ′.
  • FIG. 3 shows an embodiment of the present invention.
  • Barrel 20 bearing pistons 30 is jointly linked to driving shaft 10 .
  • Pistons 30 are resting against swash plate 40 by means of sliding skids 50 .
  • Spring 90 is maintaining on one part piston heads against sliding skids 50 by means of disc 91 and on other part back side 21 of barrel 20 against valve plate 80 said valve plate 80 comprising two symmetrical circular drillings 70 / 70 ′.
  • Valve plate 80 is supported by a staged double piston the two sections 81 and 82 of which have equal surfaces on the side opposed to the drilling 70 and 70 ′, designated by S 1 and S 2 .
  • Piston 82 is sliding into a cylindrical chamber 31 which is connected to circular drilling 70 by conduct 84 ; while piston 81 is sliding into cylindrical chamber 32 which is connected to circular drilling 70 ′ by conduct 83 .
  • Chamber 31 within which piston 81 is sliding is connected to opening 11 ; while chamber 32 within which piston 82 is sliding is connected to opening 10 .
  • valve plate 80 is applied against back side 21 of barrel 20 by piston 82 urged by the discharge pressure.
  • liquid under pressure is discharged through circular drilling 70 ′ and opening 11 and valve plate 80 is applied against back side 21 of barrel 20 by piston 81 urged by the discharge pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
US13/924,014 2012-06-28 2013-06-21 Axial pistons hydraulic pump able to function in one or the other rotating direction Abandoned US20140003970A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1256159A FR2992691B1 (fr) 2012-06-28 2012-06-28 Pompe hydraulique a pistons axiaux pouvant fonctionner dans les deux sens de rotation
FR1256159 2012-06-28

Publications (1)

Publication Number Publication Date
US20140003970A1 true US20140003970A1 (en) 2014-01-02

Family

ID=46826770

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/924,014 Abandoned US20140003970A1 (en) 2012-06-28 2013-06-21 Axial pistons hydraulic pump able to function in one or the other rotating direction

Country Status (3)

Country Link
US (1) US20140003970A1 (fr)
EP (1) EP2679818B1 (fr)
FR (1) FR2992691B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150110656A1 (en) * 2013-10-22 2015-04-23 Hydro Leduc Hydraulic piston pump having distribution through a bi-directional port plate
US20160340206A1 (en) * 2015-05-18 2016-11-24 Shane Antos System and method of predicting water quality in a decentralized treatment system
CN112539147A (zh) * 2020-12-07 2021-03-23 中船重工重庆液压机电有限公司 一种集成式配流盘及微量泵

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201609351D0 (en) * 2016-05-26 2016-07-13 Rolls Royce Controls & Data Services Ltd Axial piston pump/motor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199461A (en) * 1963-05-27 1965-08-10 Cessna Aircraft Co Hydraulic pump or motor
US5941156A (en) * 1996-09-15 1999-08-24 Nagatomo Fluid Machinery Laboratory Ltd. Fluid communication valve for high and low pressure ports of a differential hydraulic motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988987A (en) * 1996-08-28 1999-11-23 Fia Solutions, Inc. Method for merging and/or ratio blending aliquant
WO2006129431A1 (fr) * 2005-05-30 2006-12-07 Hitachi Construction Machinery Co., Ltd. Machine rotative hydraulique à plateau oscillant à déplacement variable
US8419381B2 (en) * 2007-07-31 2013-04-16 Kayaba Industry Co., Ltd. Tandem piston pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199461A (en) * 1963-05-27 1965-08-10 Cessna Aircraft Co Hydraulic pump or motor
US5941156A (en) * 1996-09-15 1999-08-24 Nagatomo Fluid Machinery Laboratory Ltd. Fluid communication valve for high and low pressure ports of a differential hydraulic motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Oilgear Co., Technical Bulletin 4700D, 'Axial piston pumps, variable delivery, open loop', (Jun 2010) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150110656A1 (en) * 2013-10-22 2015-04-23 Hydro Leduc Hydraulic piston pump having distribution through a bi-directional port plate
US20160340206A1 (en) * 2015-05-18 2016-11-24 Shane Antos System and method of predicting water quality in a decentralized treatment system
CN112539147A (zh) * 2020-12-07 2021-03-23 中船重工重庆液压机电有限公司 一种集成式配流盘及微量泵

Also Published As

Publication number Publication date
FR2992691A1 (fr) 2014-01-03
EP2679818B1 (fr) 2014-12-24
EP2679818A1 (fr) 2014-01-01
FR2992691B1 (fr) 2014-07-18

Similar Documents

Publication Publication Date Title
US20140003970A1 (en) Axial pistons hydraulic pump able to function in one or the other rotating direction
EP3020969B1 (fr) Agencement de pompe
AR108587A1 (es) Bomba de fluido de desplazamiento positivo de doble acción
AR096761A1 (es) Extremo de fluido para una bomba de alta presión y métodos para aplicar una sustancia resistente al desgaste a dicho extremo
US2445281A (en) Hydraulic pump
WO2012078870A3 (fr) Alésage de soupape décalé dans une pompe alternative
CA2949708C (fr) Pompe alternative presentant une meilleure geometrie d'alesage transversal de cylindre de fluide
US8333572B2 (en) Pump
EP4375506A3 (fr) Pompe hydraulique à déplacement
ATE495364T1 (de) Kolbenpumpe mit variabler exzentrizität
WO2020016716A3 (fr) Système de pompage
US2972955A (en) Submersible pump
US20160131118A1 (en) Tandem axial piston pump with shared cylinder block
US20130336815A1 (en) Hydraulic axial piston pump able to operate in both directions
US2386675A (en) Pump or compressor
US20180156207A1 (en) Axial piston hydraulic pump
US3009423A (en) Hydraulic pump valve spacer
USRE20574E (en) Pumpplungeb
US2337510A (en) Reciprocating pump for delivering liquids
US10590920B2 (en) Pump device
CA3002258A1 (fr) Pompe alternative dotee d'un trou perpendiculaire ameliore
US786143A (en) Double rotary force-pump.
US20150104336A1 (en) Scalable Pumping Mechanism Utilizing Anti-Synchronized Poly-Diaphragm Stack
GB842360A (en) Improvements in or relating to swash-plate pumps
US10036372B1 (en) Injector pump with roller bearing assembly

Legal Events

Date Code Title Description
AS Assignment

Owner name: HYDRO LEDUC, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:POREL, LOUIS-CLAUDE;REEL/FRAME:030846/0143

Effective date: 20130702

STCB Information on status: application discontinuation

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