EP1435457A1 - Pompe axiale avec dispositif automatique de réglage du débit - Google Patents

Pompe axiale avec dispositif automatique de réglage du débit Download PDF

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Publication number
EP1435457A1
EP1435457A1 EP03000020A EP03000020A EP1435457A1 EP 1435457 A1 EP1435457 A1 EP 1435457A1 EP 03000020 A EP03000020 A EP 03000020A EP 03000020 A EP03000020 A EP 03000020A EP 1435457 A1 EP1435457 A1 EP 1435457A1
Authority
EP
European Patent Office
Prior art keywords
support
plate
pistons
motor pump
pump according
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Withdrawn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
EP03000020A
Other languages
German (de)
English (en)
Inventor
Giancarlo Lanfredi
Stefano Grossi
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.)
Lavorwash SpA
Original Assignee
Lavorwash SpA
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 Lavorwash SpA filed Critical Lavorwash SpA
Priority to EP03000020A priority Critical patent/EP1435457A1/fr
Priority to US10/336,695 priority patent/US20040131473A1/en
Publication of EP1435457A1 publication Critical patent/EP1435457A1/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Withdrawn legal-status Critical Current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
    • F04B1/14—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
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B1/26—Control
    • F04B1/28—Control of machines or pumps with stationary cylinders

Definitions

  • the present invention relates to a motor pump for high-pressure washers.
  • At least two pistons push against the plate and are arranged parallel to the axis in radially spaced positions.
  • the rotation of the plate produces an axial movement of the pistons (conversion of a rotary motion into a reciprocating motion) and therefore a pumping action.
  • the flow-rate and pressure are invariable, and therefore if one wishes to perform adjustments it is necessary to install downstream or upstream control and actuation systems on which the operator acts manually.
  • the aim of the present invention is to provide a motor pump for high-pressure washers the structure whereof solves the drawbacks noted in commercially available motor pumps, particularly ensuring in a fully automatic manner a considerable increase in flow-rate, even during low-pressure operation, thus ensuring high-level washing capabilities even in fields which entail particularly heavy cleaning with deposits that are difficult to remove.
  • an object of the present invention is to provide a motor pump whose structure requires no manual regulation devices, except for those for directly setting the tool being used, such as for example a cleaning lance.
  • Another object of the present invention is to provide a motor pump whose structure is constructively simple and thus ensures constructive levels and costs that are fully competitive with those of commercially available motor pumps having a similar functionality.
  • Another object of the present invention is to provide a motor pump whose structure ensures high flexibility in application both in terms of flow-rate and in terms of pressure.
  • Another object of the present invention is to provide a motor pump whose structure can be manufactured with known technologies and equipment.
  • a motor pump for high-pressure washers having a structure of the type that comprises a plate that is inclined with respect to its axis and on which at least two pistons push, said pistons being arranged parallel to the axis in radially spaced positions, characterized in that said rotating plate is rotationally rigidly associated with a motorized support, which is arranged opposite said pistons and on which said plate can oscillate freely in order to vary its inclination, with respect to the rotation axis, between preset values that determine the axial movement of said pistons, elastic means for contrasting the variations in inclination induced by said pistons being functionally interposed between said plate and said support.
  • a motor pump for high-pressure washers having the structure according to the invention is generally designated by the reference numeral 10 in a first embodiment.
  • the motor pump 10 can be applied advantageously to high-pressure washers for which considerable variations of the operating conditions are intended.
  • the motor pump 10 comprises, within a hermetic casing not shown, a rotating plate 11 that is associated so as to rotate jointly with a motorized support 12 (which is also plate-like), on which the plate 11 can oscillate freely in order to vary its inclination with respect to the rotation axis 13 (axis of symmetry).
  • the plate 11 has a semicircular protrusion 17 that is coupled to a complementarily shaped slot 18 of an inclined resting surface 12a of the support 12 so that rotation occurs jointly with the possibility of oscillation between values that determine the axial movement of the pistons 15 and 16.
  • the elastic contrast means 14 are constituted by an elastic element 19, which rests on the plate 11 on one side and is partially inserted in a seat 20 of the support 12 so as to push in contrast with the action of the pistons 15 and 16.
  • the elastic element 19 is constituted by a helical spring 22 and is partially inserted in the seat 20 formed in the plate 11 in a radial region that substantially corresponds to the region of the pistons 15 and 16.
  • a threaded stroke limiting pin 24 is further inserted axially in the elastic element 19 and is in turn coupled to a corresponding threaded hole 25 formed in the plate 11.
  • the pin 24 passes through a corresponding through hole 26 of the support 12.
  • the motor pump 10 ensures that when the pressure drops there is a consequent increase in flow-rate, thus maintaining washing efficiency unchanged.
  • the thrust of the pistons 15 and 16 is in fact such as to compress the spring 22 and arrange the plate 11 in a position in which it has the smallest inclination and therefore provides the smallest flow-rate.
  • a motor pump for high-pressure washers having the structure according to the invention is generally designated by the reference numeral 110 in a second embodiment.
  • the motor pump 110 comprises, inside a hermetic casing that is not shown, a rotating plate 111 that is rigidly rotationally associated with a motorized support 112, on which the plate 111 is free to oscillate in order to vary its inclination with respect to the rotation axis 113 (axis of symmetry).
  • Elastic means 114 are functionally interposed between the plate 111 and the support 112 in order to contrast the variations in inclination induced by two pistons 115 and 116, which are arranged, at a center bearing 128, parallel to the axis 113 in positions that are radially spaced and opposite with respect to the support 112.
  • the plate 111 has a protrusion 117 (for contact with the support 112), which is perpendicular to the plane formed by the axes of the pistons 115 and 116 and lies in an axially offset position with respect to the axis 113.
  • the protrusion 117 rests on an inclined surface 112a of the support 112.
  • the plate 111 further has, on the opposite side with respect to the axis 113, at least one triangular tab 118 with a rounded vertex, which is in contact with a slot 125 of the support 112 on which it slides.
  • the contact points formed by the protrusion 117 and the tab 118 are sized so as to keep unchanged, during movements, the intersection 126 between the axis 127 of the center bearing 128 of the plate 111 and the axis 113.
  • the elastic contrast means 114 are constituted by a leaf spring 119 or a Belleville washer spring or a half-leaf spring, which is arranged between the support 112 and the plate 111, is fixed at one end in a seat 129 of the support 112 by means of a screw 130, and pushes so as to contrast the action of the pistons 15 and 16.
  • the spring 119 is kept in the preloaded position by a damping element 131, which is inserted in a seat 132 formed in the support 112 in a radial region that substantially corresponds to the region of the pistons 115 and 116 and is pivoted, by means of its stem, between two tabs 118.
  • the damping element 131 which is fixed to the support 112 by means of its body in a manner that is not visible in the figures and acts in a per se known manner by transferring fluid between the two chambers into which its interior is divided by a piston 133, is designed to limit the vibrations of the plate 111 and to preserve the spring 119 against early breakage.
  • a motor pump for high-pressure washers having the structure according to the invention is generally designated by the reference numeral 210 in a third embodiment.
  • the motor pump 210 can be applied advantageously to high-pressure washers for which considerable variations in the operating conditions are intended.
  • the motor pump 210 comprises, within a hermetic casing that is not shown, a rotating plate 211 that is rotationally rigidly associated with a motorized support 212, on which the plate 211 is free to oscillate in order to vary its inclination with respect to the rotation axis 213 (axis of symmetry).
  • Elastic means 214 for contrasting the changes in inclination induced by two pistons 215 and 216, arranged parallel to the axis 213 in radially spaced and opposite positions with respect to the support 212, are functionally interposed between the plate 211 and the support 212.
  • the plate 211 has a diametrical lower slot 217, which has a rectangular cross-section and in which a corresponding upper portion 212a of the support 212 is arranged.
  • the plate 211 can move freely with respect to the support 212 within the limits allowed by two pins, designated by the reference numerals 227 and 228 respectively, which are inserted in the part 212a of the support 212 and pass transversely through the plate 211 at suitable slotted holes 229 and 230, so as to produce joint rotation with the possibility of oscillations between values that determine the axial movement of the pistons 215 and 216 so as to keep unchanged the point 231 of intersection between the axis 213 and the axis 232 of a center bearing 233 arranged between the plate 211 and the pistons 215 and 216.
  • the elastic contrast means 214 are constituted by a tubular elastic element 219, made in this case of polyurethane, which is compressed between two mushroom-shaped elements 234 and 235, which have hemispherical heads and stems that are inserted at its ends; said tubular element rests at one end against a complementarily shaped hemispherical seat 211a of the plate 211 and is inserted in a seat 220 of the support 212 so as to push in contrast with the action of the pistons 215 and 216.
  • the elastic element 219 is inserted in the seat 220 formed in the support 212 in a radial region that substantially corresponds to the region of the pistons 215 and 216.
  • the operation of the motor pump is as follows: the operator, by appropriately setting the preloading of the elastic element 19 or 119, or by choosing the material of the spring 219, determines the contrast force of the plate 11, 111 or 211 on the pistons 15 and 16, 115 and 116, or 215 and 216.
  • the motor pump 10, 110 or 210 ensures, when the pressure drops, a consequent increase in flow-rate, keeping the effectiveness of the washing action unchanged.
  • the thrust of the pistons 15 and 16, 115 and 116, 215 and 216 is in fact such as to compress the spring 19, 119, 219 and arrange the plate 11, 111, 211 in the position of minimum inclination and therefore minimum flow-rate.
  • the materials and the dimensions may be any according to requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP03000020A 2003-01-03 2003-01-03 Pompe axiale avec dispositif automatique de réglage du débit Withdrawn EP1435457A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03000020A EP1435457A1 (fr) 2003-01-03 2003-01-03 Pompe axiale avec dispositif automatique de réglage du débit
US10/336,695 US20040131473A1 (en) 2003-01-03 2003-01-06 Motor pump for high-pressure washers with automatically variable flow-rate and pressure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP03000020A EP1435457A1 (fr) 2003-01-03 2003-01-03 Pompe axiale avec dispositif automatique de réglage du débit
US10/336,695 US20040131473A1 (en) 2003-01-03 2003-01-06 Motor pump for high-pressure washers with automatically variable flow-rate and pressure

Publications (1)

Publication Number Publication Date
EP1435457A1 true EP1435457A1 (fr) 2004-07-07

Family

ID=33312095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03000020A Withdrawn EP1435457A1 (fr) 2003-01-03 2003-01-03 Pompe axiale avec dispositif automatique de réglage du débit

Country Status (2)

Country Link
US (1) US20040131473A1 (fr)
EP (1) EP1435457A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085272A1 (fr) * 2004-11-19 2007-08-02 Lavorwash S.P.A. Pompe et appareil de nettoyage comportant ladite pompe
WO2009083153A1 (fr) * 2007-12-28 2009-07-09 Robert Bosch Gmbh Montage à berceau pivotant pour machines à pistons axiaux
CN106593851A (zh) * 2017-01-10 2017-04-26 段俊荣 一种斜盘及采用了该斜盘的轴向柱塞泵/马达
ES2937207A1 (es) * 2021-09-23 2023-03-24 Moran Emiliano Fernandez Bomba de pistones axiales

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8333571B2 (en) * 2008-12-12 2012-12-18 Caterpillar Inc. Pump having pulsation-reducing engagement surface
RU2451830C1 (ru) * 2010-10-07 2012-05-27 Владимир Кузьмич Кутузов Аксиально-плунжерный гидромотор
CN103998778B (zh) * 2012-01-20 2017-05-31 阿尔弗雷德·凯驰两合公司 用于高压清洁设备的活塞泵
US9051927B2 (en) 2012-02-17 2015-06-09 Briggs & Stratton Corporation Water pump having two operating conditions
US8814531B2 (en) 2012-08-02 2014-08-26 Briggs & Stratton Corporation Pressure washers including jet pumps
AU2015358511B2 (en) 2014-12-05 2018-11-29 Briggs & Stratton, Llc Pressure washers including jet pumps

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR629542A (fr) * 1927-02-21 1927-11-12 Pompe sans soupapes à double effet pour filature de soie artificielle et autres applications
DE1099357B (de) * 1958-04-25 1961-02-09 Heinrich Hemme Axialkolbenpumpe mit Nieder- und Hochdruckteil
US3376822A (en) * 1966-01-06 1968-04-09 Leduc Rene Variable-delivery hydraulic pump
GB1132971A (en) * 1965-09-02 1968-11-06 Charles Howard Matthew Maddox Improvements in or relating to reciprocating compressors and reciprocating hydraulic pumps
DE2030978A1 (de) * 1969-06-23 1971-01-07 Shimadzu Seisakusho Ltd , Nakakyo, Kyoto (Japan) Plungerkolbenpumpe mit Druckaus gleichsvomchtung
US3575534A (en) * 1968-02-07 1971-04-20 Gerard Leduc Constant torque hydraulic pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784328A (en) * 1972-06-13 1974-01-08 Sperry Rand Corp Power transmission
JPS4963003A (fr) * 1972-06-16 1974-06-19
US4137013A (en) * 1977-09-22 1979-01-30 The Bendix Corporation Variable displacement piston pump
US4232587A (en) * 1979-04-25 1980-11-11 Kline Manufacturing Co. Fluid pump
DE3743125A1 (de) * 1987-12-18 1989-07-06 Brueninghaus Hydraulik Gmbh Axialkolbenpumpe
JP2001107843A (ja) * 1999-10-12 2001-04-17 Aida Eng Ltd 可変ピストンポンプ・モータ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR629542A (fr) * 1927-02-21 1927-11-12 Pompe sans soupapes à double effet pour filature de soie artificielle et autres applications
DE1099357B (de) * 1958-04-25 1961-02-09 Heinrich Hemme Axialkolbenpumpe mit Nieder- und Hochdruckteil
GB1132971A (en) * 1965-09-02 1968-11-06 Charles Howard Matthew Maddox Improvements in or relating to reciprocating compressors and reciprocating hydraulic pumps
US3376822A (en) * 1966-01-06 1968-04-09 Leduc Rene Variable-delivery hydraulic pump
US3575534A (en) * 1968-02-07 1971-04-20 Gerard Leduc Constant torque hydraulic pump
DE2030978A1 (de) * 1969-06-23 1971-01-07 Shimadzu Seisakusho Ltd , Nakakyo, Kyoto (Japan) Plungerkolbenpumpe mit Druckaus gleichsvomchtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085272A1 (fr) * 2004-11-19 2007-08-02 Lavorwash S.P.A. Pompe et appareil de nettoyage comportant ladite pompe
WO2009083153A1 (fr) * 2007-12-28 2009-07-09 Robert Bosch Gmbh Montage à berceau pivotant pour machines à pistons axiaux
CN106593851A (zh) * 2017-01-10 2017-04-26 段俊荣 一种斜盘及采用了该斜盘的轴向柱塞泵/马达
CN106593851B (zh) * 2017-01-10 2018-09-14 段俊荣 一种斜盘及采用了该斜盘的轴向柱塞泵/马达
ES2937207A1 (es) * 2021-09-23 2023-03-24 Moran Emiliano Fernandez Bomba de pistones axiales

Also Published As

Publication number Publication date
US20040131473A1 (en) 2004-07-08

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