EP0484762A1 - Pompe haute pression à deux pistons et moteur à commutation pour nettoyeur hydraulique - Google Patents

Pompe haute pression à deux pistons et moteur à commutation pour nettoyeur hydraulique Download PDF

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Publication number
EP0484762A1
EP0484762A1 EP91118208A EP91118208A EP0484762A1 EP 0484762 A1 EP0484762 A1 EP 0484762A1 EP 91118208 A EP91118208 A EP 91118208A EP 91118208 A EP91118208 A EP 91118208A EP 0484762 A1 EP0484762 A1 EP 0484762A1
Authority
EP
European Patent Office
Prior art keywords
pistons
high pressure
pressure pump
hydrocleaning
equipment
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Withdrawn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
EP91118208A
Other languages
German (de)
English (en)
Inventor
Gabriele Bonezzi
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.)
Officine Meccaniche FAIP Srl
Original Assignee
Officine Meccaniche FAIP Srl
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 Officine Meccaniche FAIP Srl filed Critical Officine Meccaniche FAIP Srl
Publication of EP0484762A1 publication Critical patent/EP0484762A1/fr
Withdrawn legal-status Critical Current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
    • F04B1/124—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
    • F04B1/14—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
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B49/24—Bypassing

Definitions

  • hydrocleaning pumps operating through the 180° pistons have been designed without fully providing a solution, as a smooth water delivery output has not been realised.
  • the adoption of such basic solution does in fact provide a delivery alternating between maximum flow and practically zero flow.
  • designers must introduce pressure accumulators which, if on the one hand smooth out the flow rate, on the other not only complicate the device, but contribute to the increase of unit costs.
  • the purpose of the subject invention is that of realising an extremely compact, small size, low weight pump specific for hydrocleaning devices capable of assuring constant water flow rate characteristics.
  • This and other finalities are satisfied by the subject pump which is basically characterised by two pistons operating at 180° and actuated by a swash plate on direct drive from the shaft of a commutator-type, high-speed, electric motor.
  • the compact by-pass valve ideally located between the two pistons, takes up little space and contributes in good measure in limiting the overall dimensions of the pump.
  • the high pressure pump identified as the assembly 10 is basically an elongated cylindrical structure, the right hand side of which contains the housing 12 for a driving device, preferably an electric motor of the distributor type, and a central portion made up by a flange 14 and an integral casing and a left hand portion consisting of headpiece 18 to which the output manifold 22 is attached by screws 20.
  • Fig. 2 illustrates schematically that with piston 34 in the fully withdrawn position, input valve 50 open and output valve 62 closed, the related compression chamber fills.
  • Piston 36 is shown instead in the fully advanced position with the related input valve 54 closed and output valve 64 open. In this condition, the compressed water present in the compression chamber of cylinder head 18 is channelled through output manifold 22 to the user gun.
  • Fig. 1 the shaded arrows identify the water flow when the spray gun in not activated: ball non-return valve 54 is open.
  • a back pressure is set up, as shown by black arrows, that causes non-return valve 42 to close and, via the pressure release duct 56, plunger 58 is forced to rise which in turn acts on ball 54 that opens up the by-pass flow path 60 towards output manifold 22 (on Fig. 2).
  • Resulting operation is that the pump continues to rotate and pumps the water present in the cylinder heads without delivering it to the exhaust.
  • a commutator motor smaller and lighter as compared to an equivalent induction motor, contributes to the reduction of size and weight. If the aspect of size and weight is compared with that of a traditional pump of equal rate of flow (between 6.5 arid 7 litre/min) it results higher than 50 per cent.
  • the amount of sound proofing material can be increased to reduce noise emission from the assembly.
  • the pump structured as described, considered the high rate of motor RPMs, does not show reduction of the flow of water even if only operating with two pistons.
  • the pump may be equipped with two pistons of materials different from ceramic or be driven by an electric motor different from a commutator motor or even types of internal combustion engines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP91118208A 1990-11-06 1991-10-25 Pompe haute pression à deux pistons et moteur à commutation pour nettoyeur hydraulique Withdrawn EP0484762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT021975A IT9021975A1 (it) 1990-11-06 1990-11-06 Pompa ad alta pressione a due pistoni con motore del tipo a collettore specie per macchine idropulitrici.
IT2197590 1990-11-06

Publications (1)

Publication Number Publication Date
EP0484762A1 true EP0484762A1 (fr) 1992-05-13

Family

ID=11189638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118208A Withdrawn EP0484762A1 (fr) 1990-11-06 1991-10-25 Pompe haute pression à deux pistons et moteur à commutation pour nettoyeur hydraulique

Country Status (2)

Country Link
EP (1) EP0484762A1 (fr)
IT (1) IT9021975A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583779A1 (fr) * 1992-08-17 1994-02-23 Flow International Corporation Dispositif compensateur de pression pour pompe à haute pression
EP0666419A2 (fr) * 1993-10-13 1995-08-09 Honda Giken Kogyo Kabushiki Kaisha Dispositif à pression hydraulique avec plateau
WO2005061889A1 (fr) * 2003-12-20 2005-07-07 Itw Limited Pompes
WO2006116343A2 (fr) * 2005-04-21 2006-11-02 Kmt Waterjet Systems, Inc. Cylindre et piston ajustes
CN103527438A (zh) * 2012-07-04 2014-01-22 北京精密机电控制设备研究所 一种用于液压系统的集成电机泵

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1201441A (fr) * 1957-11-14 1959-12-30 Rech Etudes Production Sarl Pompe auto-régulatrice avec tiroir central de régulation
US3954048A (en) * 1975-01-28 1976-05-04 Houser John W High pressure actuator
WO1984000403A1 (fr) * 1982-07-13 1984-02-02 Karl Sauder Pompe a pistons axiaux
EP0149219A2 (fr) * 1983-12-28 1985-07-24 Speck-Kolbenpumpen-Fabrik Pompe à piston
EP0221304A1 (fr) * 1985-09-30 1987-05-13 Siemens Aktiengesellschaft Moteur à collecteur du type fermé
FR2618187A1 (fr) * 1987-07-14 1989-01-20 Gilardini Spa Pompe electrique pour liquides.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1201441A (fr) * 1957-11-14 1959-12-30 Rech Etudes Production Sarl Pompe auto-régulatrice avec tiroir central de régulation
US3954048A (en) * 1975-01-28 1976-05-04 Houser John W High pressure actuator
WO1984000403A1 (fr) * 1982-07-13 1984-02-02 Karl Sauder Pompe a pistons axiaux
EP0149219A2 (fr) * 1983-12-28 1985-07-24 Speck-Kolbenpumpen-Fabrik Pompe à piston
EP0221304A1 (fr) * 1985-09-30 1987-05-13 Siemens Aktiengesellschaft Moteur à collecteur du type fermé
FR2618187A1 (fr) * 1987-07-14 1989-01-20 Gilardini Spa Pompe electrique pour liquides.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583779A1 (fr) * 1992-08-17 1994-02-23 Flow International Corporation Dispositif compensateur de pression pour pompe à haute pression
US5380159A (en) * 1992-08-17 1995-01-10 Flow International Corporation Pressure compensation device for high-pressure liquid pump
EP0666419A2 (fr) * 1993-10-13 1995-08-09 Honda Giken Kogyo Kabushiki Kaisha Dispositif à pression hydraulique avec plateau
EP0666419A3 (fr) * 1993-10-13 1995-10-18 Honda Motor Co Ltd Dispositif à pression hydraulique avec plateau.
US5554009A (en) * 1993-10-13 1996-09-10 Honda Giken Kogyo Kabushiki Kaisha Swash-plate hydraulic pressure device
WO2005061889A1 (fr) * 2003-12-20 2005-07-07 Itw Limited Pompes
CN100523496C (zh) * 2003-12-20 2009-08-05 Itw有限公司 泵
US7938632B2 (en) 2003-12-20 2011-05-10 Itw Limited Piston pump with cam follower arrangement
WO2006116343A2 (fr) * 2005-04-21 2006-11-02 Kmt Waterjet Systems, Inc. Cylindre et piston ajustes
WO2006116343A3 (fr) * 2005-04-21 2007-01-18 Kmt Waterjet Systems Inc Cylindre et piston ajustes
CN103527438A (zh) * 2012-07-04 2014-01-22 北京精密机电控制设备研究所 一种用于液压系统的集成电机泵
CN103527438B (zh) * 2012-07-04 2016-06-01 北京精密机电控制设备研究所 一种用于液压系统的集成电机泵

Also Published As

Publication number Publication date
IT9021975A0 (it) 1990-11-06
IT9021975A1 (it) 1992-05-07

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