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 PDFInfo
- 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- Withdrawn
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
- F04B1/122—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)
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)
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)
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. |
-
1990
- 1990-11-06 IT IT021975A patent/IT9021975A1/it unknown
-
1991
- 1991-10-25 EP EP91118208A patent/EP0484762A1/fr not_active Withdrawn
Patent Citations (6)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB SE |
|
17P | Request for examination filed |
Effective date: 19921029 |
|
17Q | First examination report despatched |
Effective date: 19930511 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19940316 |