EP0793017B1 - Pumpe für ein Hochdruckreinigungsgerät - Google Patents
Pumpe für ein Hochdruckreinigungsgerät Download PDFInfo
- Publication number
- EP0793017B1 EP0793017B1 EP97101289A EP97101289A EP0793017B1 EP 0793017 B1 EP0793017 B1 EP 0793017B1 EP 97101289 A EP97101289 A EP 97101289A EP 97101289 A EP97101289 A EP 97101289A EP 0793017 B1 EP0793017 B1 EP 0793017B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- cylinder
- pump according
- bores
- cylinder block
- 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.)
- Expired - Lifetime
Links
- 238000004140 cleaning Methods 0.000 title claims description 8
- 230000000284 resting effect Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
-
- 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
- F04B1/143—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
- 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
- the invention relates to a pump for a high-pressure cleaning device with a cylinder block in which several parallel cylinder bores are arranged with a connected to the cylinder block, the cylinder head with aligned with the cylinder bores of the cylinder block Has holes that are common to each an axially displaceable along the bores by a drive Form pump piston receiving guides, with pump chambers connected to the bores in the cylinder head, which with intake valves a suction line and via outlet valves with a Pressure line connected, and with one of the pressure line leading to the suction line, through a Locking valve lockable bypass line.
- Such a pump is for example from DE 39 28 006 A1 known. You can reach with one Pump a very space-saving design because the essential Parts in the cylinder block and in the cylinder head are cheap to accommodate.
- bypass line and this Bypass line closing closing valve which at Pressure washers also referred to as overflow devices becomes.
- the closing valve is arranged in a chamber in the cylinder block which is from the outer edge of the cylinder block perpendicular to the longitudinal axis of the cylinder bores in the Clearance between the cylinder bores in the cylinder block extends.
- the chamber as Hole is formed, preferably narrows Hole stepped towards its inner end.
- the chamber can enter the suction line occur so that no additional on this side Connection lines become necessary.
- suction line perpendicular to the longitudinal axis of the cylinder bores and transversely to the longitudinal axis of the chamber from the outer edge of the cylinder block between the cylinder bores in the cylinder block entry.
- a valve opening closing valve body moves. Is cheap it when the valve opening through an annular Bet is formed against a lower tier of Chamber is present.
- valve body via a piston rod with the control piston connected, the valve opening under training an annular gap passes through and the valve body its end protruding from the valve opening.
- control piston through a spring is moved radially outwards so that the valve body closes the valve opening this is pending.
- a channel enters with a channel in the cylinder head is connected, which in turn at a throttle point the pressure line or downstream thereof the pressure line opens.
- the channels in the cylinder block or in the cylinder head integrated and therefore do not require an additional one Room.
- the channel in the cylinder block essentially arranged tangential to its outer edge is. This arrangement makes it possible to pass through the channel create a hole that is oblique to the longitudinal axis the chamber from the chamber into the cylinder block is introduced. This will make it facilitated.
- cylinder bores provided in the cylinder block on the Corner points of an equilateral triangle arranged are.
- the longitudinal axis of the chamber passes through the Connection line from two vertices of the triangle perpendicular.
- the chamber extends up to extends into the center of the cylinder block.
- control piston seals one Extension for actuation emerging from the chamber has a switching device. This allows the movement of the control piston to be used for additional To perform switching operations, for example thereby the drive of the Pump be switched off.
- the high-pressure cleaning device shown in the drawing comprises an electric motor 1 lying in one Housing 2 is arranged and its motor shaft 3 on protrudes from both ends. Bears on one side the motor shaft 3 is a fan wheel 4 with which the motor flows around Cooling air is conveyed on the opposite Side a swash plate 5, which is the drive element for a high pressure pump attached to the motor housing 6 forms.
- This high pressure pump is composed of two components, namely a cylinder block 7 and a flat on this adjacent cylinder head 8. Both components can be designed, for example, as aluminum die-cast parts his.
- the cylinder block 7 has three cylinder bores 9, which pass through the cylinder block 7 and their parallel Longitudinal axes run parallel to the motor shaft 3.
- This Cylinder bores 9 are at the corner points arranged equilateral triangle, the center of which lies approximately in the middle of the cylinder block 7.
- Three bores 10 are also arranged in the cylinder head 8, the one with the cylinder bores 9 in the cylinder block 7 aligned when the cylinder block 7 and the cylinder head 8 joined together flat are.
- the aligned cylinder bores 9 and holes 10 form a guide for each have a cylindrical pump piston 11, which in the two holes in the longitudinal direction and opposite the holes sealed by seals 12, 13 is led.
- the pump pistons 11 are through Coil springs 14, which are on the one hand on the cylinder block 7 and on the other hand on a pressure cuff 15 support the pump piston 11 with its out of the cylinder bore 9 protruding free end against the swash plate 5 pressed so that the pump piston 11 at Rotation of the motor shaft 3 an oscillating longitudinal displacement experienced in holes 9 and 10.
- the bores 10 in the cylinder head 8 are as blind bores executed, they open into the cylinder head 8 arranged pump chambers 16, which have an inlet valve 17 with a suction line 18 and an outlet valve 19 are connected to a pressure chamber 20. With the oscillating Movement of the pump piston 11 is over the Inlet valve 17 sucked liquid from the suction line 18 and then via the outlet valve 19 under emitted high pressure in the pressure chamber 20.
- the pressure room stands with one shown in the drawing Pressure line in connection through which the funded Liquid is supplied to a hose line 21, which in turn is connected to a hand-held spray gun 22 is ( Figure 1).
- a suction line opens radially into the cylinder block 7 23 a, located inside one of the cylinder block 7 molded, radially projecting pipe socket 24 is located and which are between the cylinder bores 9 extends into the interior of the cylinder block 7, the suction line 23 approximately through the center of the spanned by the three cylinder bores 9 Triangle runs through and below that of the pipe socket 24 opposite cylinder bore 9 ends ( Figure 4).
- Three parallel to the cylinder bores 9 Running bores 25 are with the suction line 23 in connection, these bores 25 are sleeve-shaped Connectors 26 with the inlet valves 17 in the cylinder head and form together with these connecting pieces 26, the suction lines 18th out.
- the connecting pieces 26 are sealing in Extensions 27, 28 in the cylinder block 7 or in the cylinder head 8 used and thereby bridge the connection surface between cylinder block 7 and cylinder head 8th.
- Control spool 33 includes, at its lower End carries a piston rod 34. Enforced this a central opening 35 of an annular insert 36, which narrows at a lower step 37 Bore 29 supports and that via an O-ring seal 38 is sealed off from the bore 29.
- the outside diameter of the piston rod is less than the diameter of the central opening 35 so that forms an annular gap between the two parts.
- a flared Valve body 39 which by a 32 in the lower part arranged, surrounding the piston rod 34, on Insert 36 and helical spring supporting the control piston 33 40 in a closing the central opening 35 Plant on the insert 36 is moved.
- a closure body is sealed in the upper part space 31 41 used by an end plate 42 is held in the bore 29.
- This extension 43 is used Actuation of a switch 44, which is above the cylinder block 7 arranged in the high-pressure cleaning device is. This switch 44 switches when actuated accordingly the electric motor 1 on or off.
- the stepped bore 29 opens into the suction line 23 on.
- the lower subspace 32 emerges parallel to the longitudinal axis the cylinder bores 9 from a channel 45, the via a connector 46 and a channel 47 in the Cylinder head 8 with the pressure chamber 20 in connection stands.
- the connector 46 is similar to the connector 26 sealed in extensions 48 or 49 of the cylinder head 8 and the cylinder block 7 used and bridges the dividing plane in this area between cylinder block 7 and cylinder head 8.
- This hole is like that arranged that they from the top of the tiered Hole 29 can be introduced from for this purpose is in the side wall opposite line 50 a corresponding recess 51 is provided in the bore 29, which enables straight-line access to line 50.
- the line 50 opens into a parallel to the cylinder bores 9 extending channel 52, the same Way as the channel 45 via one in the drawing not shown connector with one in the Drawing also not shown channel in the cylinder head 8 communicates.
- This channel leads to a outgoing from the pressure chamber 20 pressure line and opens into this in the area of a narrowing of the pressure line or downstream of such a constriction.
- the pump pistons 11 through the swash plate 5 driven oscillating and thereby pump Liquid in the manner described from the suction lines 18 in the pressure chamber 20.
- the liquid is the suction line 18 through the pipe socket 24, the Suction line 23, the holes 25 and the connectors 26 forwarded.
- the pump pressure gets below Liquid from the pressure chamber 20 via the channel 47, the connector 46 and the channel 45 in the lower Subspace 32 of the bore 29, also stands upper subspace 31 via line 50 and channel 52 in the manner described in connection with the pressure line. Due to the flowing liquid in the pressure line arises in the area of narrowing in the Pressure line a pressure drop due to the throttling effect the constriction is also downstream of the constriction a pressure drop compared to the pressure chamber 20 available. As a result, the upper subspace 31 with a Pressure applied that is lower than the pressure in the lower subspace 32. This leads together with the force the coil spring 40 so that the control piston 33rd is pushed up, the valve body 39 closes the central opening 35. The closing valve in the bore 29 remains closed by the Pump-conveyed liquid passes from the pressure chamber 20 via the subsequent pressure line to the hand spray gun 22.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Gas Separation By Absorption (AREA)
Description
- Figur 1:
- eine schematische Schnittansicht durch ein Hochdruckreinigungsgerät mit einem Taumelscheibenantrieb;
- Figur 2:
- eine vergrößerte Schnittansicht im Bereich der Pumpe des Hochdruckreinigungsgerätes der Figur 1 mit dem Schließventil in der Bypassleitung in Schließstellung;
- Figur 3:
- eine Ansicht ähnlich Figur 2 mit dem Schließventil in Öffnungsstellung, wobei der Zylinderkopf nur schematisch wiedergegeben ist, und
- Figur 4:
- eine Schnittansicht längs Linie 4-4 in Figur 2.
Claims (15)
- Pumpe für ein Hochdruckreinigungsgerät mit einem Zylinderblock, in dem mehrere parallele Zylinderbohrungen angeordnet sind, mit einem mit dem Zylinderblock verbundenen Zylinderkopf, der mit den Zylinderbohrungen des Zylinderblockes ausgerichtete Bohrungen aufweist, die gemeinsam mit diesen jeweils eine längs der Bohrungen durch einen Antrieb axial verschiebliche Pumpenkolben aufnehmende Führung ausbilden, mit mit den Bohrungen in Verbindung stehenden Pumpenkammern im Zylinderkopf, die über Einlaßventile mit einer Saugleitung und über Auslaßventile mit einer Druckleitung in Verbindung stehen, und mit einer von der Druckleitung zur Saugleitung führenden, durch ein Schließventil verschließbaren Bypassleitung, dadurch gekennzeichnet, daß das Schließventil (30) im Zylinderblock (7) in einer Kammer (29) angeordnet ist, die sich vom äußeren Rand des Zylinderblockes (7) senkrecht zur Längsachse der Zylinderbohrungen (9) in den Zwischenraum zwischen den Zylinderbohrungen (9) im Zylinderblock (7) erstreckt.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Kammer (29) als Bohrung ausgebildet ist.
- Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß sich die Kammer (29) in Richtung auf ihr inneres Ende stufig verengt.
- Pumpe nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Kammer (29) an ihrem inneren Ende in die Saugleitung (23) eintritt.
- Pumpe nach Anspruch 4, dadurch gekennzeichnet, daß die Saugleitung (23) senkrecht zur Längsachse der Zylinderbohrungen (9) und quer zur Längsachse der Kammer (29) vom äußeren Rand des Zylinderblockes (7) zwischen die Zylinderbohrungen (9) im Zylinderblock (7) eintritt.
- Pumpe nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß in der Kammer (29) ein diese in einen oberen und einen unteren Teilraum (31 bzw. 32) unterteilender Steuerkolben (33) axial verschieblich gelagert ist, der einen eine Ventilöffnung (35) verschließenden Ventilkörper (39) verschiebt.
- Pumpe nach Anspruch 6, dadurch gekennzeichnet, daß die Ventilöffnung (35) durch einen ringförmigen Einsatz (36) gebildet wird, der gegen eine untere Stufe (37) der Kammer (29) anliegt.
- Pumpe nach Anspruch 7, dadurch gekennzeichnet, daß der Ventilkörper (39) über eine Kolbenstange (34) mit dem Steuerkolben (33) verbunden ist, die die Ventilöffnung (35) unter Ausbildung eines Ringspaltes durchsetzt und den Ventilkörper (39) an ihrem aus der Ventilöffnung (35) vorstehenden Ende trägt.
- Pumpe nach Anspruch 8, dadurch gekennzeichnet, daß der Steuerkolben (33) durch eine Feder (40) radial nach außen verschoben wird, so daß der Ventilkörper (39) die Ventilöffnung (35) verschließend an dieser anliegt.
- Pumpe nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß parallel zur Längsachse der Zylinderbohrungen (9) ein Kanal (45) in den unteren Teilraum (32) eintritt, der mit einem mit der Druckleitung (20) in Verbindung stehenden Kanal (47) im Zylinderkopf (8) verbunden ist.
- Pumpe nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, daß in den oberen Teilraum (31) ein Kanal (50, 52) eintritt, der mit einem Kanal im Zylinderkopf (8) verbunden ist, der seinerseits an einer Drosselstelle der Druckleitung oder stromabwärts davon in die Druckleitung einmündet.
- Pumpe nach Anspruch 11, dadurch gekennzeichnet, daß der Kanal (50) im Zylinderblock (7) im wesentlichen tangential zu dessen äußerem Rand verlaufend angeordnet ist.
- Pumpe nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß drei Zylinderbohrungen (9) vorgesehen sind, die auf den Eckpunkten eines gleichseitigen Dreiecks angeordnet sind, und daß die Längsachse der Kammer (29) die Verbindungslinie von zwei Eckpunkten des Dreiecks senkrecht durchsetzt.
- Pumpe nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß sich die Kammer (29) bis in die Mitte des Zylinderblockes (7) erstreckt.
- Pumpe nach einem der Ansprüche 6 bis 14, dadurch gekennzeichnet, daß der Steuerkolben (33) eine abgedichtet aus der Kammer (29) austretende Verlängerung (43) zur Betätigung einer Schalteinrichtung (44) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19607881 | 1996-03-01 | ||
DE19607881A DE19607881C2 (de) | 1996-03-01 | 1996-03-01 | Pumpe für ein Hochdruckreinigungsgerät |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0793017A2 EP0793017A2 (de) | 1997-09-03 |
EP0793017A3 EP0793017A3 (de) | 1998-11-18 |
EP0793017B1 true EP0793017B1 (de) | 2001-06-20 |
Family
ID=7786914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97101289A Expired - Lifetime EP0793017B1 (de) | 1996-03-01 | 1997-01-28 | Pumpe für ein Hochdruckreinigungsgerät |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0793017B1 (de) |
AT (1) | ATE202406T1 (de) |
DE (1) | DE19607881C2 (de) |
DK (1) | DK0793017T3 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPD20030053U1 (it) * | 2003-07-10 | 2005-01-11 | Lavorwash Spa | Struttura di pompa idraulica a pistoni assiali |
DE102007017970A1 (de) * | 2007-04-11 | 2008-10-16 | Alfred Kärcher Gmbh & Co. Kg | Hochdruckreinigungsgerät |
DE102009049094A1 (de) * | 2009-10-01 | 2011-04-07 | Alfred Kärcher Gmbh & Co. Kg | Pumpe für ein Hochdruckreinigungsgerät |
DE102009049095A1 (de) | 2009-10-01 | 2011-04-07 | Alfred Kärcher Gmbh & Co. Kg | Pumpe für ein Hochdruckreinigungsgerät |
DE102009049096A1 (de) * | 2009-10-01 | 2011-04-07 | Alfred Kärcher Gmbh & Co. Kg | Pumpe für ein Hochdruckreinigungsgerät |
WO2013060386A1 (de) * | 2011-10-28 | 2013-05-02 | Alfred Kärcher Gmbh & Co. Kg | Hochdruckreinigungsgerät |
WO2020126014A1 (de) * | 2018-12-20 | 2020-06-25 | Alfred Kärcher SE & Co. KG | Hochdruckreinigungsgerät |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1453856A (fr) * | 1965-03-29 | 1966-09-30 | Bennes Marrel | Perfectionnements aux pompes hydrauliques à pistons axiaux |
US3679328A (en) * | 1970-03-27 | 1972-07-25 | Applied Power Ind Inc | Variable pressure sensitive pump |
DE3248622C2 (de) * | 1982-12-30 | 1985-10-17 | Alfred Kärcher GmbH & Co, 7057 Winnenden | Hochdruckreinigungsgerät |
DE8514497U1 (de) * | 1985-05-15 | 1985-07-18 | Kränzle, Josef, 7918 Illertissen | Hochdruckkolbenpumpe |
DK165129C (da) * | 1988-09-02 | 1993-02-22 | Westergaard Knud E Ind As | Aksialstempelpumpe til vaesker, navnlig til brug i hoejtryksrenseapparater |
DE9013630U1 (de) * | 1990-09-28 | 1991-01-31 | Speck-Kolbenpumpenfabrik Otto Speck GmbH & Co. KG, 8192 Geretsried | Hochdruck-Flüssigkeitspumpe |
DE4338896C2 (de) * | 1993-11-15 | 1997-03-13 | Suttner Gmbh & Co Kg | Axialkolbenpumpe |
DE4445519C1 (de) * | 1994-12-20 | 1996-06-05 | Kaercher Gmbh & Co Alfred | Kolbenpumpe für ein Hochdruckreinigungsgerät |
IT239544Y1 (it) * | 1995-07-14 | 2001-03-05 | Lavorwash S R L | Struttura di pompa a piattello rotante particolarmente peridropulitrici |
-
1996
- 1996-03-01 DE DE19607881A patent/DE19607881C2/de not_active Expired - Fee Related
-
1997
- 1997-01-28 DK DK97101289T patent/DK0793017T3/da active
- 1997-01-28 EP EP97101289A patent/EP0793017B1/de not_active Expired - Lifetime
- 1997-01-28 AT AT97101289T patent/ATE202406T1/de active
Also Published As
Publication number | Publication date |
---|---|
EP0793017A3 (de) | 1998-11-18 |
EP0793017A2 (de) | 1997-09-03 |
ATE202406T1 (de) | 2001-07-15 |
DE19607881A1 (de) | 1997-09-04 |
DE19607881C2 (de) | 2003-07-17 |
DK0793017T3 (da) | 2001-09-03 |
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