WO1997004234A1 - Wing-cell pump with a flow-control valve - Google Patents
Wing-cell pump with a flow-control valve Download PDFInfo
- Publication number
- WO1997004234A1 WO1997004234A1 PCT/EP1996/003041 EP9603041W WO9704234A1 WO 1997004234 A1 WO1997004234 A1 WO 1997004234A1 EP 9603041 W EP9603041 W EP 9603041W WO 9704234 A1 WO9704234 A1 WO 9704234A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control valve
- flow
- flow control
- pump
- channels
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
Definitions
- the invention relates to a vane pump with a pump package which consists of a rotor with slots which is fixed on a drive shaft and in which working slides which are radially movable seal in a cam ring.
- Working chambers are formed between the cam ring, the rotor and the working slides, which are delimited in the axial direction by control plates.
- a flow control valve which is acted upon on the one hand by the delivery pressure and on the other hand by the outlet pressure plus a spring force, is installed in a pump housing and can connect a pressure chamber to spray channels arranged at an angle to one another.
- a vane line pump is known, for example, from US Pat. No. 5,112,199. This pump has a flow control valve which works with a piston valve.
- the invention is therefore based on the object of improving the flow control valve of the pump in the transition region from the piston bore into the spraying channels in such a way that an absolutely uniform filling of the suction spaces is ensured.
- This object is achieved by the vane-line pump characterized in claim 1 in that the flow control valve is designed as a seat valve which, in its starting position, bears against the control plate for sealing and in that the spraying channels are extended to the control plate.
- the flow control valve thus initially remains closed in the proportional area, while it opens immediately in the de-energizing area. In a regulating position, the flow control piston, depending on the position, discharges a more or less large delivery flow to the suction side.
- the arrangement of the spray-off channels results in a uniform distribution of the cut-off current and the cavitation and pump noise are reduced. In addition, there is no need to drill the spray channels twice and the associated problematic demands on dimensional accuracy.
- the spray channels can be poured into the housing without particular difficulty.
- the leakage losses in the proportional area remain low due to the seat valve and the dead stroke of the flow control piston is reduced.
- the reduction in the dead stroke results in improved cold start behavior. Due to the fact that the spray channels are extended upwards at their confluence with the piston bore, installation space is gained and the spring can be made longer, so that a reduction in the spring rate is possible.
- An advantageous embodiment of the invention is characterized in that the spray channels have a rectangular cross section. While a circular hole changes unfavorably in two dimensions due to enlargement, the rectangular cross-section can only be expanded in depth. The spray ducts can thus be more easily matched to the control quantity.
- the spray channels have a rectangular cross section. While a circular hole changes unfavorably in two dimensions due to enlargement, the rectangular cross-section can only be expanded in depth. The spray ducts can thus be more easily matched to the control quantity.
- FIG. 1 shows a longitudinal section through the vane pump according to the invention
- Figure 2 is a plan view on a reduced scale along the line II-II in Fig. 1.
- Fig. 4 is a partial section corresponding to Fig. 3 in a regulation position
- Fig. 5 shows the flow rate characteristic that can be achieved with the pump.
- the vane pump is used to convey pressure oil from a container (not shown) to a consumer (not shown), for example an auxiliary power steering system.
- a rotor set 3 is used in an oil-filled pressure chamber 1 of a housing 2.
- the rotor set 3 consists of a cam ring 4 and a rotor 5.
- the rotor 5 is arranged in the interior of the cam ring 4 and has radially directed slots in which vanes 6 can be displaced.
- Working chambers are formed between the cam ring 4, the rotor 5 and the vanes 6 and are delimited in the axial direction by control surfaces of adjacent control plates 7 and 8.
- the pump corresponds to a double-stroke version.
- the housing 2 is composed of a bearing housing 10 and a cup-shaped housing cover 11.
- the rotor 5 is non-rotatably seated on a drive shaft 12 which is supported in the bearing housing 10.
- the bearing point in the bearing housing 10 is the only bearing of the drive shaft 12. This means that the drive shaft 12 is not supported in the housing cover 11 in the radial direction. Rather, the drive shaft 12 is supported in a housing cover 11 in the axial direction.
- a flow control valve 13 is provided in the bearing housing 10 for regulating the pressure oil led to the pressure connection.
- the flow control valve 13 is designed as a seat valve which closes a bore 14 in the control plate 7 with its end face.
- two spray channels 16 and 16A which are rectangular in cross section, adjoin a piston bore 15 and extend to the edge 15A of the piston bore 15 (FIG. 4).
- the Ab- Spray channels 16, 16A open into two suction zones 24 and 24A between the working chambers of the double-stroke pump.
- the spray channels 16, 16A are connected via connecting channels 20, 20A to a suction channel 21, through which the container oil flows.
- the flow control valve 13 has a piston 17 which is displaceable against the force of a spring 18. Behind the piston 17, a bore 22 opens into the piston bore 15, which connects an outlet channel 19 to the rear of the flow control valve 13.
- the flow control valve 13 works as follows: With increasing speed, the differential pressure increases due to a throttle 23 between the pressure chamber 1 and the outlet 19, the force of which acts on the end face of the piston 17 of the flow control valve 13.
- the piston 17 is initially still closed by the spring 18. When the cut-off point is reached, the piston 17 lifts off its seat and allows a flow part (FIG. 4) to flow off to the suction zones 24 and 24A.
- the flow control valve is in its de-energizing area.
- the piston 17 acts as a pressure compensator and moves against the force of the spring 18 and against the force of the outlet pressure behind the piston 17 in FIG. 1 to the left.
- the piston 17 opens a larger cross-section of the rectangular spray cross-section, so that the suction zones 24 and 24A receive a larger flow of current (FIG. 4).
- the one under high pressure Oil jet sprayed via the spray channels 16, 16A entrains additional oil from the connecting channels 20, 20A from the suction channel 21 or the tank, which favors a good charging of the pump.
Abstract
The invention concerns a wing-cell pump with a flow-control valve (13). Prior art flow-control valves are designed as sliding valves which, when the oil flow is shut off, connect two discharge channels with the delivery side, thus feeding part of the flow back to the aspiration side. The flow-control valve (13) proposed is designed as a seat valve and obturates against a control plate (7). It is initially closed and opens, when the force of its spring has been overcome in the shut-off region, a relatively large rectangular opening on the aspiration side of the pump. The flow-control valve (13) proposed has good cold-start characteristics.
Description
Flügelzellenpumpe mit einem Stromregelventil Vane pump with a flow control valve
Die Erfindung betrifft eine Flügelzellenpumpe mit ei- nem Pumpenpaket, das aus einem auf einer Antriebswelle fe¬ sten Rotor mit Schlitzen besteht, in welchem in einem Kur¬ venring radial bewegliche Arbeitsschieber abdichten. Zwi¬ schen dem Kurvenring, dem Rotor und den Arbeitsschiebern sind Arbeitskammern gebildet, die durch Steuerplatten in axialer Richtung begrenzt sind. Weiterhin ist in einem Pum¬ pengehäuse ein einerseits vom Förderdruck und andererseits vom Auslaßdruck plus einer Federkraft beaufschlagtes Strom¬ regelventil eingebaut, das eine Verbindung von einer Druck¬ kammer zu im Winkel zueinander angeordneten Abspritzkanälen herstellen kann. Eine derartige Flügelzeilenpumpe ist bei¬ spielsweise aus der US-PS 5 112 199 bekannt. Diese Pumpe hat ein Stromregelventil, das mit einem Kolbenschieber ar¬ beitet. Bei der Rückleitung des Abregelstromes über zwei Abspritzkanäle, die als Bohrungen in die Schieberbohrung einmünden, kann es zu ungleicher Befüllung der Saugräume kommen. Durch eine ungleiche Position der Abspritzkanäle, die auf unvermeidliche Bearbeitungstoleranzen zurückzufüh¬ ren sind, teilt sich das unter hohem Druck stehende Öl nicht gleichmäßig auf beide Abspritzkanäle auf. Die Posi- tion der Einmündungen der beiden Abspritzkanäle in der Kol¬ benbohrung des Stromregelventils muß daher sehr genau sein.The invention relates to a vane pump with a pump package which consists of a rotor with slots which is fixed on a drive shaft and in which working slides which are radially movable seal in a cam ring. Working chambers are formed between the cam ring, the rotor and the working slides, which are delimited in the axial direction by control plates. Furthermore, a flow control valve, which is acted upon on the one hand by the delivery pressure and on the other hand by the outlet pressure plus a spring force, is installed in a pump housing and can connect a pressure chamber to spray channels arranged at an angle to one another. Such a vane line pump is known, for example, from US Pat. No. 5,112,199. This pump has a flow control valve which works with a piston valve. When the cut-off current is returned via two spray ducts, which open into the slide bore as bores, the suction spaces may be filled unevenly. Due to an unequal position of the spray channels, which are due to unavoidable machining tolerances, the oil under high pressure is not divided evenly between the two spray channels. The position of the mouths of the two spray ducts in the piston bore of the flow control valve must therefore be very precise.
Der Erfindung liegt deshalb die Aufgabe zugrunde, das Stromregelventil der Pumpe im Übergangsbereich von der Kol- benbohrung in die Abspritzkanäle so zu verbessern, daß eine absolut gleichmäßige Befüllung der Saugräume gesichert ist.
Diese Aufgabe ist durch die im Anspruch 1 gekennzeich¬ nete Flügelzeilenpumpe dadurch gelöst, daß das Stromregel¬ ventil als Sitzventil ausgebildet ist, das in seiner Aus¬ gangsstellung zur Abdichtung an der Steuerplatte anliegt und daß die Abspritzkanäle bis zur Steuerplatte verlängert sind. Das Stromregelventil bleibt somit im Proportionalbe¬ reich zunächst geschlossen, während es im Abregeibereich sofort öffnet. In einer Abregelstellung leitet der Stromre¬ gelkolben, je nach Stellung, einen mehr oder weniger großen Förderström zur Saugseite ab. Durch die Anordnung der Ab¬ spritzkanäle ergibt sich eine gleichmäßige Aufteilung des Abregelstromes und die Kavitation und das Pumpengeräusch verringern sich. Außerdem entfällt das zweimalige Bohren der Abspritzkanäle und die damit verbundene problematische Forderung an die Maßhaltigkeit. Die Abspritzkanäle lassen sich ohne besondere Schwierigkeiten in das Gehäuse eingie¬ ßen. Durch das Sitzventil bleiben die Leckverluste im Pro¬ portionalbereich gering und der Tothub des Stromregelkol¬ bens verringert sich. Die Verringerung des Tothubes ergibt ein verbessertes Kaltstartverhalten. Dadurch, daß die Ab¬ spritzkanäle an ihrer Einmündung in die Kolbenbohrung nach oben verlängert sind, wird Bauraum gewonnen und man kann die Feder länger ausführen, so daß eine Reduzierung der Federrate möglich ist.The invention is therefore based on the object of improving the flow control valve of the pump in the transition region from the piston bore into the spraying channels in such a way that an absolutely uniform filling of the suction spaces is ensured. This object is achieved by the vane-line pump characterized in claim 1 in that the flow control valve is designed as a seat valve which, in its starting position, bears against the control plate for sealing and in that the spraying channels are extended to the control plate. The flow control valve thus initially remains closed in the proportional area, while it opens immediately in the de-energizing area. In a regulating position, the flow control piston, depending on the position, discharges a more or less large delivery flow to the suction side. The arrangement of the spray-off channels results in a uniform distribution of the cut-off current and the cavitation and pump noise are reduced. In addition, there is no need to drill the spray channels twice and the associated problematic demands on dimensional accuracy. The spray channels can be poured into the housing without particular difficulty. The leakage losses in the proportional area remain low due to the seat valve and the dead stroke of the flow control piston is reduced. The reduction in the dead stroke results in improved cold start behavior. Due to the fact that the spray channels are extended upwards at their confluence with the piston bore, installation space is gained and the spring can be made longer, so that a reduction in the spring rate is possible.
Eine vorteilhafte Ausgestaltung der Erfindung zeichnet sich dadurch aus, daß die Abspritzkanäle einen rechteckigen Querschnitt aufweisen. Während eine kreisrunde Bohrung durch Vergrößerung sich gleichzeitig ungünstig in zwei Di- mensionen ändert, läßt sich der rechteckige Querschnitt nur in der Tiefe erweitern. Die Abspritzkanäle können so leich¬ ter auf die Abregelmenge abgestimmt werden. In der Be¬ schreibung und in den Ansprüchen ist nur eine Kombinations-
möglichkeit in bezug auf die Ausgestaltung und die Anwen¬ dung ausführlich dargestellt. Dem Leser wird empfohlen, jede Aussage auch einzeln zu betrachten und ihre Brauchbar¬ keit in anderen Zusammenhängen und Kombinationen zu über- prüfen, dies insbesondere im Zusammenhang mit dem angeführ¬ ten Stand der Technik. Naheliegende Möglichkeiten ergeben sich für den Fachmann, wenn er die geschilderten Maßnahmen wegen der damit verbundenen Vorteile benutzt.An advantageous embodiment of the invention is characterized in that the spray channels have a rectangular cross section. While a circular hole changes unfavorably in two dimensions due to enlargement, the rectangular cross-section can only be expanded in depth. The spray ducts can thus be more easily matched to the control quantity. In the description and in the claims, only one combination possibility in relation to the design and the application is shown in detail. The reader is recommended to consider each statement individually and to check its usability in other contexts and combinations, in particular in connection with the state of the art. Obvious possibilities arise for the person skilled in the art if he uses the described measures because of the associated advantages.
Nachfolgend ist die Erfindung anhand der Zeichnung näher erläutert. Es zeigen:The invention is explained in more detail below with reference to the drawing. Show it:
Fig. 1 einen Längsschnitt durch die erfindungsgemä- ße Flügelzellenpumpe;1 shows a longitudinal section through the vane pump according to the invention;
Fig. 2 eine Draufsicht in verkleinertem Maßstab nach der Linie II-II in Fig. 1;Figure 2 is a plan view on a reduced scale along the line II-II in Fig. 1.
Fig. 3 einen Teil-Schnitt durch das Stromregelven¬ til nach der Linie III-III in Schließstel¬ lung;3 shows a partial section through the flow control valve along the line III-III in the closed position;
Fig. 4 einen Teil-Schnitt entsprechend Fig. 3 in einer Abregelstellung undFig. 4 is a partial section corresponding to Fig. 3 in a regulation position and
Fig. 5 die mit der Pumpe erzielbare Förderstrom- Kennlinie.Fig. 5 shows the flow rate characteristic that can be achieved with the pump.
Die Flügelzellenpumpe dient zum Fördern von Drucköl aus einem nicht dargestellten Behälter zu einem nicht dar¬ gestellten Verbraucher, beispielsweise einer Hilfskraftlen¬ kung.
In Fig. 1 ist in einem ölgefüllten Druckraum 1 eines Gehäuses 2 ein Rotorensatz 3 eingesetzt. Der Rotorensatz 3 besteht aus einem Kurvenring 4 und einem Rotor 5. Der Ro- tor 5 ist im Inneren des Kurvenringes 4 angeordnet und weist radial gerichtete Schlitze auf, in denen Flügel 6 verschiebbar sind. Zwischen dem Kurvenring 4, dem Rotor 5 und den Flügeln 6 sind Arbeitskammern gebildet, die von Steuerflächen benachbarter Steuerplatten 7 und 8 in axialer Richtung begrenzt sind. Die Pumpe entspricht einer doppel- hubigen Ausführung.The vane pump is used to convey pressure oil from a container (not shown) to a consumer (not shown), for example an auxiliary power steering system. In Fig. 1, a rotor set 3 is used in an oil-filled pressure chamber 1 of a housing 2. The rotor set 3 consists of a cam ring 4 and a rotor 5. The rotor 5 is arranged in the interior of the cam ring 4 and has radially directed slots in which vanes 6 can be displaced. Working chambers are formed between the cam ring 4, the rotor 5 and the vanes 6 and are delimited in the axial direction by control surfaces of adjacent control plates 7 and 8. The pump corresponds to a double-stroke version.
Das Gehäuse 2 ist aus einem Lagergehäuse 10 und einem topfförmigen Gehäusedeckel 11 zusammengesetzt. Der Rotor 5 sitzt drehfest auf einer Antriebswelle 12, die sich in dem Lagergehäuse 10 abstützt. Die Lagerstelle in dem Lagerge¬ häuse 10 ist die einzige Lagerung der Antriebswelle 12. Dies bedeutet, daß die Antriebswelle 12 in dem Gehäusede- kel 11 in radialer Richtung nicht gelagert ist. Die An- triebswelle 12 stützt sich vielmehr in einem Gehäuse¬ deckel 11 in axialer Richtung ab.The housing 2 is composed of a bearing housing 10 and a cup-shaped housing cover 11. The rotor 5 is non-rotatably seated on a drive shaft 12 which is supported in the bearing housing 10. The bearing point in the bearing housing 10 is the only bearing of the drive shaft 12. This means that the drive shaft 12 is not supported in the housing cover 11 in the radial direction. Rather, the drive shaft 12 is supported in a housing cover 11 in the axial direction.
Neben einem nicht sichtbaren Sauganschluß für den An¬ schluß des Behälters sowie einem gleichfalls nicht sicht- baren Druckanschluß für den Verbraucher ist in dem Lagerge¬ häuse 10 ein Stromregelventil 13 für die Regelung des zu dem Druckanschluß geführten Drucköls vorgesehen. Das Strom¬ regelventil 13 ist nach der Erfindung als Sitzventil ausge¬ führt, welches mit seiner Stirnseite eine Bohrung 14 in der Steuerplatte 7 verschließt. Wie aus Fig. 3 ersichtlich, schließen an eine Kolbenbohrung 15 zwei im Querschnitt rechteckförmige Abspritzkanäle 16 und 16A an, die bis zum Rand 15A der Kolbenbohrung 15 verlaufen (Fig. 4) . Die Ab-
spritzkanäle 16, 16A münden in zwei Saugzonen 24 und 24A zwischen den Arbeitskammern der doppelhubigen Pumpe. Die Abspritzkanäle 16, 16A sind über Verbindungskanäle 20, 20A mit einem Saugkanal 21 verbunden, über den das Behälteröl zuströmt. Das Stromregelventil 13 hat einen Kolben 17, der gegen die Kraft einer Feder 18 verschiebbar ist. Hinter dem Kolben 17 mündet eine Bohrung 22 in die Kolbenbohrung 15, die einen Auslaßkanal 19 mit der Rückseite des Stromregel¬ ventils 13 verbindet.In addition to an invisible suction connection for the connection of the container and a likewise invisible pressure connection for the consumer, a flow control valve 13 is provided in the bearing housing 10 for regulating the pressure oil led to the pressure connection. According to the invention, the flow control valve 13 is designed as a seat valve which closes a bore 14 in the control plate 7 with its end face. As can be seen from FIG. 3, two spray channels 16 and 16A, which are rectangular in cross section, adjoin a piston bore 15 and extend to the edge 15A of the piston bore 15 (FIG. 4). The Ab- Spray channels 16, 16A open into two suction zones 24 and 24A between the working chambers of the double-stroke pump. The spray channels 16, 16A are connected via connecting channels 20, 20A to a suction channel 21, through which the container oil flows. The flow control valve 13 has a piston 17 which is displaceable against the force of a spring 18. Behind the piston 17, a bore 22 opens into the piston bore 15, which connects an outlet channel 19 to the rear of the flow control valve 13.
Die Kennlinie nach Fig. 5 zeigt den Förderstrom in Abhängigkeit von der Drehzahl. In einem unteren Proportio¬ nalbereich P steigt der Förderstrom stetig an, um nach dem sogenannten Abregelpunkt bei ca. 1 000 U/min in einen waa- gerechten Bereich A überzugehen. Der überschüssige Förder¬ strom U fließt zur Saugseite ab.5 shows the flow rate as a function of the speed. In a lower proportional area P, the flow rate rises steadily in order to change to a horizontal area A after the so-called cut-off point at approx. 1,000 rpm. The excess flow rate U flows off to the suction side.
Das Stromregelventil 13 arbeitet wie folgt: Mit steigender Drehzahl nimmt der Differenzdruck wegen ei- ner Drossel 23 zwischen dem Druckraum 1 und dem Auslaß 19 zu, dessen Kraft auf die Stirnseite des Kolbens 17 des Stromregelventils 13 wirkt. Dabei ist der Kolben 17 zu¬ nächst noch durch die Feder 18 geschlossen. Beim Erreichen des Abregelpunktes hebt der Kolben 17 von seinem Sitz ab und läßt ein Stromteil (Fig. 4) zu den Saugzonen 24 und 24A abfließen. Das Stromregelventil befindet sich in seinem Abregeibereich. Der Kolben 17 wirkt als Druckwaage und ver¬ schiebt sich gegen die Kraft der Feder 18 und gegen die Kraft des hinter dem Kolben 17 herrschenden Auslaßdruckes in Fig. 1 nach links. Bei weiter steigender Drehzahl öffnet der Kolben 17 einen größeren Querschnitt des rechteckigen Abspritzquerschnitts, so daß den Saugzonen 24 und 24A ein größerer Stromteil zufließt (Fig. 4) . Der unter hohem Druck
über die Abspritzkanäle 16, 16A abgespritzte Olstrahl reißt aus den Verbindungskanälen 20, 20A zusätzliches Öl aus dem Saugkanal 21 bzw. dem Tank mit, was eine gute Aufladung der Pumpe begünstigt.
The flow control valve 13 works as follows: With increasing speed, the differential pressure increases due to a throttle 23 between the pressure chamber 1 and the outlet 19, the force of which acts on the end face of the piston 17 of the flow control valve 13. The piston 17 is initially still closed by the spring 18. When the cut-off point is reached, the piston 17 lifts off its seat and allows a flow part (FIG. 4) to flow off to the suction zones 24 and 24A. The flow control valve is in its de-energizing area. The piston 17 acts as a pressure compensator and moves against the force of the spring 18 and against the force of the outlet pressure behind the piston 17 in FIG. 1 to the left. As the speed continues to increase, the piston 17 opens a larger cross-section of the rectangular spray cross-section, so that the suction zones 24 and 24A receive a larger flow of current (FIG. 4). The one under high pressure Oil jet sprayed via the spray channels 16, 16A entrains additional oil from the connecting channels 20, 20A from the suction channel 21 or the tank, which favors a good charging of the pump.
Bezugszeichenreference numeral
1 Druckraum1 pressure room
2 Gehäuse2 housings
3 Rotorensatz3 rotor set
4 Kurvenring4 curve ring
5 Rotor5 rotor
6 Flügel6 wings
7 Steuerplatte7 control plate
8 Steuerplatte8 control plate
9 -9 -
10 Lagergehäuse10 bearing housings
11 Gehäusedeckel11 housing cover
12 Antriebswelle12 drive shaft
13 Stromregelventil13 flow control valve
14 Bohrung in 714 hole in 7
15 Kolbenbohrung15 piston bore
15A Rand15A edge
16, 16A Abspritzkanäle16, 16A spray channels
17 Kolben von 1317 pistons from 13
18 Feder18 spring
19 Auslaßkanal19 outlet duct
20, 20A Verbindungskanäle20, 20A connection channels
21 Saugkanal21 suction channel
22 Bohrung in 1522 hole in 15
23 Drossel23 throttle
24, 24A Saugzone24, 24A suction zone
A AbregeibereichA quenching area
P ProportionalbereiP proportional adjustment
U überschüssiger St
U excess St
Claims
1. Flügelzellenpumpe mit folgenden Merkmalen: - in einem Gehäuse ist ein Pumpenpaket (3) , bestehend aus einem auf einer Antriebswelle (12) festen Rotor (5) mit Schlitzen und darin radial beweglichen Arbeitsschiebern (6), geführt, die gegen einen Kurven¬ ring (4) abdichten; - zwischen dem Kurvenring (4) , dem Rotor (5) und den Ar¬ beitsschiebern (6) sind Arbeitskammern gebildet, die durch Steuerplatten (7, 8) in axialer Richtung be¬ grenzt sind; im Gehäuse (10) ist ein einerseits vom Förderdruck und andererseits vom Auslaßdruck plus einer Federkraft beaufschlagtes Stromregelventil (13) eingebaut, das eine Verbindung von einer Druckkammer (1) zu im Winkel zueinander angeordneten Abspritzkanälen (16, 16A) her¬ stellen kann; - die Abspritzkanäle (16, 16A) stehen mit zu den Förder¬ kammern führenden Saugzonen (24, 24A) in Verbindung, g e k e n n z e i c h n e t durch folgende Merkmale: das Stromregelventil (13) ist als Sitzventil ausgebil¬ det und liegt in seiner Ausgangsstellung zur Abdich- tung an der Steuerplatte (7) an und die Abspritzkanäle (16, 16A) sind bis zum Rand (15A) der Kolbenbohrung (15) verlängert.1. Vane pump with the following features: - In a housing is a pump package (3) consisting of a fixed on a drive shaft (12) rotor (5) with slots and therein radially movable working slides (6), which against a curve seal ring (4); - Working chambers are formed between the cam ring (4), the rotor (5) and the working slides (6), which are delimited in the axial direction by control plates (7, 8); In the housing (10) a flow control valve (13), which is acted upon on the one hand by the delivery pressure and on the other hand by the outlet pressure plus a spring force, is installed, which can establish a connection from a pressure chamber (1) to spray channels (16, 16A) arranged at an angle to one another; - The spray channels (16, 16A) are connected to suction zones (24, 24A) leading to the delivery chambers, characterized by the following features: the flow control valve (13) is designed as a seat valve and is in its initial position for sealing on the control plate (7) and the spray channels (16, 16A) are extended to the edge (15A) of the piston bore (15).
2. Flügelzellenpumpe mit einem Stromregelventil, da- durch g e k e n n z e i c h n e t , daß die Abspritzka¬ näle (16, 16A) einen rechteckigen Querschnitt haben, so daß sie im Gießverfahren herstellbar sind. 2. Vane pump with a flow control valve, so that the spraying channels (16, 16A) have a rectangular cross-section, so that they can be produced in the casting process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995125866 DE19525866A1 (en) | 1995-07-15 | 1995-07-15 | Vane pump with a flow control valve |
| DE19525866.5 | 1995-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997004234A1 true WO1997004234A1 (en) | 1997-02-06 |
Family
ID=7766938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1996/003041 WO1997004234A1 (en) | 1995-07-15 | 1996-07-11 | Wing-cell pump with a flow-control valve |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19525866A1 (en) |
| WO (1) | WO1997004234A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7612009B2 (en) | 2003-02-21 | 2009-11-03 | Dow Global Technologies, Inc. | Process for homo-or copolymerization of conjugated olefines |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005056024B4 (en) * | 2004-12-09 | 2016-11-10 | Magna Powertrain Bad Homburg GmbH | pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788770A (en) * | 1972-06-15 | 1974-01-29 | Gen Motors Corp | Fluid pump with flow control means |
| US4971528A (en) * | 1989-03-06 | 1990-11-20 | Stanadyne Automotive Corp. | Lube oil pump with relief valve |
-
1995
- 1995-07-15 DE DE1995125866 patent/DE19525866A1/en not_active Withdrawn
-
1996
- 1996-07-11 WO PCT/EP1996/003041 patent/WO1997004234A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788770A (en) * | 1972-06-15 | 1974-01-29 | Gen Motors Corp | Fluid pump with flow control means |
| US4971528A (en) * | 1989-03-06 | 1990-11-20 | Stanadyne Automotive Corp. | Lube oil pump with relief valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7612009B2 (en) | 2003-02-21 | 2009-11-03 | Dow Global Technologies, Inc. | Process for homo-or copolymerization of conjugated olefines |
| EP2267046A1 (en) | 2003-02-21 | 2010-12-29 | Dow Global Technologies Inc. | Process for homo- or copolymerization of conjugated olefines |
| US8153545B2 (en) | 2003-02-21 | 2012-04-10 | Styron Europe Gmbh | Process for homo—or copolymerization of conjugated olefins |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19525866A1 (en) | 1997-01-16 |
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