EP1596065B1 - Radial pump with balancing weight - Google Patents
Radial pump with balancing weight Download PDFInfo
- Publication number
- EP1596065B1 EP1596065B1 EP20050103658 EP05103658A EP1596065B1 EP 1596065 B1 EP1596065 B1 EP 1596065B1 EP 20050103658 EP20050103658 EP 20050103658 EP 05103658 A EP05103658 A EP 05103658A EP 1596065 B1 EP1596065 B1 EP 1596065B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- shaft
- radial
- balancing weight
- rotor
- 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 - Fee Related
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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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
Definitions
- the invention relates to a radial piston pump with a drive shaft mounted in a pump housing and at least one pump unit driven by the drive shaft.
- the radial piston pump has a pump housing in which a pump shaft is rotatably mounted. On the pump shaft, an eccentric portion is formed on which a cam ring is slidably guided. On the cam preferably support several, with respect to the drive shaft radially in the pump housing longitudinally movably guided pump piston.
- Each pump piston is assigned a suction valve and a pressure valve. During the intake stroke, fuel is supplied to the pump cylinder from the low pressure region. After the compression stroke, the compressed fuel passes via the pressure valve to a common high-pressure accumulator, the so-called common rail.
- Such a radial piston pump is usually preceded by a fuel priming pump, which supplies the fuel from the fuel tank of the high-pressure pump.
- the fuel feed pump is usually driven by an electric motor or via the camshaft.
- the invention is characterized in that the balancing weight arranged on the pump shaft is at the same time a rotor of a blocking-vane pump which serves as a fuel priming pump acts.
- the fuel feed pump can be structurally arranged very close to the radial piston pump, resulting in a particularly compact design.
- the prefeed pump can be produced by a particularly small number of components, which facilitates assembly and significantly reduces manufacturing costs.
- the balance weight preferably has the same eccentricity as the eccentric section of the pump shaft.
- the mass of the balance weight can then be determined by the thickness or the outer circumference of the balance weight.
- An advantageous embodiment of the invention provides that the balance weight is connected to the pump shaft via a shaft-hub connection.
- Shaft-hub connections are easy to make and ensure a secure connection between the balance weight and the pump shaft.
- the one shaft-hub connection is designed as a positive connection.
- the positive connection allows a particularly secure connection between the pump shaft and the balance weight. A release of the connection during pump operation is thereby excluded.
- splined shaft profiles, serrations or polygonal profiles are suitable as a form-locking connection. It is also possible to positively connect the positive connection between the balance weight and the pump shaft by additional elements such as feather keys, sliding spring or transverse pins.
- a particularly advantageous embodiment of the invention provides that the positive connection is formed such that the balance weight can be fixed only in a predetermined position on the pump shaft. As a result, the installation of the balance weight on the pump shaft is greatly facilitated.
- the positive connection is designed such that the centrifugal force of the balance weight of Centrifugal force of the eccentric is opposite. An error during assembly is reliably avoided because the balance weight can only be fixed in a predetermined position.
- a further advantageous embodiment of the invention provides that the pump shaft has a cantilevered end portion on which the balance weight is arranged.
- a receiving profile for the counterweight can be formed in a particularly simple manner.
- the balance weight can then be easily attached to the cantilevered end.
- the balance weight can not be detached from the pump shaft, it is Favor additionally secured by a securing element.
- wedges which are driven between the balance weight and the pump shaft are suitable for securing.
- the shaft and the hub on a receiving groove. Through the receiving groove in both components, the mounting position is clearly defined to each other.
- the rotor of the Sperrulatelpumpe is designed as a rotary valve.
- the prefeed pump to an inlet and an outlet window is formed, which is opened or closed by the rotor designed as a rotary valve.
- the fuel feed pump is integrated into the pump housing of the radial piston high-pressure pump.
- the integration of the fuel feed pump allows a particularly compact design of the pump unit.
- the radial piston pump according to the invention is thus characterized by the fact that the counterweight can additionally be used as a rotor for a fuel feed pump. This makes it possible to form a particularly inexpensive and simply constructed pump unit, consisting of the radial piston high-pressure pump and the fuel priming pump.
- FIG. 1a shows a radial section through the radial piston high pressure pump.
- the radial piston high-pressure pump consists essentially of a pump housing 1, in which a pump shaft 2 is rotatably mounted.
- the pump shaft 2 has an eccentric section 3.
- On the eccentric 3, a cam ring 11 is slidably mounted.
- the cam ring 11 has a number of the pump piston 4 corresponding number of flats.
- the pump piston 4 are based on sliding blocks 12 on the flattenings of the cam ring 11 from.
- the pump pistons 4 are reciprocated during pump operation by the eccentric portion of the pump shaft 2 in the pump cylinder 5. They alternately perform a suction and a compression stroke.
- the pump shaft 2 has a cantilevered end portion 10.
- the cantilevered end portion 10 has two flats 7 which serve for the positive reception of a balance weight 6.
- the compensating weight 6 has an opening which has a shape corresponding to the cantilever-mounted end area 10, so that there is a positive connection between the cantilever-mounted end area 10 and the compensating weight 8.
- the balance weight is additionally secured with a securing element 13.
- the securing element 13 is preferably introduced into a groove formed both in the pump shaft and in the balance weight 6 and clamps the two components together. Wedges are particularly suitable for this purpose.
- the trained both in the balance weight 6 and in the pump shaft groove also ensures that the balance weight 6 can be attached only in one position on the pump shaft 2. As a result, assembly errors can be avoided and the balance weight 6 is always properly aligned with the eccentric portion 3 of the pump shaft 2.
- the balance weight 6 has the same eccentricity as the eccentric portion 3 of the pump shaft 2. However, the balance weight 6 is arranged opposite the eccentric by 180 °, displaced on the pump shaft 2. As a result, the balance weight 6 generates a centrifugal force during pump operation, which counteracts the centrifugal force of the eccentric. The centrifugal forces cancel each other, which effectively avoids torsional vibrations of the pump.
- the balancing weight of the balancing weight 6 can be determined via the eccentricity s of the balancing weight 6 and the thickness or the diameter of the balancing weight 6.
- balance weight 6 is not attached to a cantilevered end portion 10, but is pushed onto the pump shaft 2 prior to assembly.
- the cantilevered end allows However, a particularly simple installation of the balance weight 6 after assembly of the pump housing and pump shaft.
- the balance weight 6 can be used simultaneously as a rotor 8 for a Kraftstoffvor suitmpe 9.
- the fuel feed pump 9 consists essentially of the formed as a rotor 8 balance weight 6, an outer ring 15 and a fixed locking wing 16.
- At the front side of the fuel feed 9 is an inlet and a drain window 17, 18 formed by the fluid on or can flow out.
- the pump chamber 19 results from the eccentric arrangement of the rotor 8 with respect to the outer ring 15. This results in a sickle-shaped pump chamber 19 which moves with the rotation of the drive shaft 2 and the rotor 8 along the circumference.
- fuel can thereby enter the pump chamber 19 through the inlet window 17 or run out of the pump chamber 19 through the outlet window 18.
- the blocking wing 16 is pressed by a spring 20 against the rotor 8 and thereby seals the inlet side and the outlet side of the pump chamber from each other.
- FIGS. 2a to 2d The following will be sent to the FIGS. 2a to 2d describes the operation of the Sperrwügelpumpe.
- the rotor 8 In FIG. 2a the rotor 8 is in its upper starting position. In this case, the outflow window 18 is completely closed by the rotor 8, so that no fuel can flow out of the sickle-shaped pump chamber 19.
- the inlet window 17, however, is not completely closed by the rotor 8 and fuel can flow through the inlet window 17 in the crescent-shaped pump chamber 19.
- FIG. 2b the rotor has rotated 90 ° counterclockwise. In this position, the rotor 8 completely closes the inlet window 17.
- the crescent-shaped pump chamber 19 has also shifted by 90 ° in the counterclockwise direction, so that now the outlet window 18 is released from the rotor 8 and the fuel from the outlet window 18 can flow out of the fuel feed pump 9.
- the balancing weight can advantageously be used simultaneously as a rotor for a fuel priming pump.
- Kraftstoffvor suitpumpe is particularly suitable a Sperrerielpumpe with a fixed barrier wing.
- the pump housing may be formed directly in a pump cover of the pump housing.
- the proposed radial piston pump is particularly suitable for high-pressure fuel generation in modern common-rail injection systems.
Description
Die Erfindung betrifft eine Radialkolbenpumpe mit einer in einem Pumpengehäuse gelagerten Antriebswelle und wenigstens einer von der Antriebswelle angetriebenen Pumpeneinheit.The invention relates to a radial piston pump with a drive shaft mounted in a pump housing and at least one pump unit driven by the drive shaft.
Aus der
Einer derartigen Radialkolbenpumpe ist üblicherweise eine Kraftstoffvorförderpumpe vorgeschaltet, die den Kraftstoff aus dem Kraftstofftank der Hochdruckpumpe zuführt. Die Kraftstoffvorförderpumpe wird in der Regel durch einen Elektromotor oder über die Nockenwelle angetrieben.Such a radial piston pump is usually preceded by a fuel priming pump, which supplies the fuel from the fuel tank of the high-pressure pump. The fuel feed pump is usually driven by an electric motor or via the camshaft.
Aufgrund der Exzentrizität der Pumpenwelle kommt es im Pumpenbetrieb insbesondere bei hohen Drehzahlen zu hohen Fliehkräften, die an der Pumpenwelle angreifen und die dadurch eine Unwucht der Pumpenwelle erzeugen. Dies führt zu Drehschwingungen in der Pumpe. Die Drehschwingungen können zu Problemen, insbesondere in Hinblick auf die Befestigung der Radialkolbenpumpe am Motorblock führen. Durch die Vibrationen kann sich die Befestigung mit der Zeit lösen. Zudem können durch die Schwingungen der Radialkolbenpumpe Körperschallgeräusche erzeugt werden.Due to the eccentricity of the pump shaft occurs in pump operation, especially at high speeds to high centrifugal forces that engage the pump shaft and thereby a Generate imbalance of the pump shaft. This leads to torsional vibrations in the pump. The torsional vibrations can lead to problems, especially with regard to the attachment of the radial piston pump to the engine block. Due to the vibrations, the attachment can loosen over time. In addition, structure-borne noise can be generated by the vibrations of the radial piston pump.
In der Offenlegungsschrift
Ausgehend vom Stand der Technik ist es somit Aufgabe der Erfindung, eine einfacher aufgebaute und preiswertere Radialkolbenpumpe bereitzustellen, bei der die Drehschwingungen in der Pumpe aufgrund der Unwucht der Pumpenwelle vermieden werden.In the published patent application
Based on the prior art, it is therefore an object of the invention to provide a simpler and cheaper radial piston pump, in which the torsional vibrations in the pump are avoided due to the imbalance of the pump shaft.
Die Aufgabe wird gelöst durch die Merkmale des unabhängigen Patentanspruchs 1.The object is solved by the features of independent claim 1.
Vorteilhafte Ausgestaltungen der Erfindung, welche einzeln oder in Kombination miteinander einsetzbar sind, sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention, which are used individually or in combination with each other, are characterized in the subclaims.
Die Erfindung zeichnet sich dadurch aus, dass das auf der Pumpenwelle angeordnete Ausgleichsgewicht gleichzeitig ein Rotor einer Sperrflügelpumpe ist, die als Kraftstoffvorförderpumpe fungiert. Auf diese Weise kann die Kraftstoffvorförderpumpe baulich sehr nah an der Radialkolbenpumpe angeordnet sein, wodurch sich eine besonders kompakte Bauform ergibt. Zusätzlich lässt sich die Vorförderpumpe durch eine besonders geringe Anzahl an Bauteilen herstellen, was die Montage erleichtert und die Herstellungskosten erheblich reduziert.The invention is characterized in that the balancing weight arranged on the pump shaft is at the same time a rotor of a blocking-vane pump which serves as a fuel priming pump acts. In this way, the fuel feed pump can be structurally arranged very close to the radial piston pump, resulting in a particularly compact design. In addition, the prefeed pump can be produced by a particularly small number of components, which facilitates assembly and significantly reduces manufacturing costs.
Erfindungsgemäß bevorzugt weist das Ausgleichsgewicht dieselbe Exzentrizität auf wie der Exzenterabschnitt der Pumpenwelle. Die Masse des Ausgleichsgewichtes kann dann über die Dicke bzw. den Aussenumfang des Ausgleichsgewichtes festgelegt werden.According to the invention, the balance weight preferably has the same eccentricity as the eccentric section of the pump shaft. The mass of the balance weight can then be determined by the thickness or the outer circumference of the balance weight.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, dass das Ausgleichsgewicht mit der Pumpenwelle über eine Wellen-Naben-Verbindung verbunden ist. Wellen-Naben-Verbindungen lassen sich einfach herstellen und gewährleisten eine sichere Verbindung zwischen dem Ausgleichsgewicht und der Pumpenwelle.An advantageous embodiment of the invention provides that the balance weight is connected to the pump shaft via a shaft-hub connection. Shaft-hub connections are easy to make and ensure a secure connection between the balance weight and the pump shaft.
In einer besonders vorteilhaften Ausgestaltung der Erfindung ist die eine Wellen-Naben-Verbindung als formschlüssige Verbindung ausgebildet. Die formschlüssige Verbindung ermöglicht eine besonders sichere Verbindung zwischen der Pumpenwelle und dem Ausgleichsgewicht. Ein Lösen der Verbindung während des Pumpenbetriebs wird dadurch ausgeschlossen. Als formschlüssige Verbindung eignen sich insbesondere Keilwellenprofile, Kerbverzahnungen oder Polygonprofile.
Es ist auch möglich die formschlüssige Verbindung zwischen dem Ausgleichsgewicht und der Pumpenwelle durch zusätzliche Elemente wie Passfedern, Gleitfeder oder Querstifte formschlüssig zu verbinden.In a particularly advantageous embodiment of the invention, the one shaft-hub connection is designed as a positive connection. The positive connection allows a particularly secure connection between the pump shaft and the balance weight. A release of the connection during pump operation is thereby excluded. In particular, splined shaft profiles, serrations or polygonal profiles are suitable as a form-locking connection.
It is also possible to positively connect the positive connection between the balance weight and the pump shaft by additional elements such as feather keys, sliding spring or transverse pins.
Eine besonders vorteilhafte Ausgestaltung der Erfindung sieht vor, dass die formschlüssige Verbindung derart ausgebildet ist, dass das Ausgleichsgewicht nur in einer vorgegebenen Position auf der Pumpenwelle fixierbar ist. Hierdurch wird die Montage des Ausgleichsgewichtes auf der Pumpenwelle erheblich erleichtert. Die formschlüssige Verbindung ist dabei derart ausgestaltet, dass die Fliehkraft des Ausgleichsgewichtes der Fliehkraft des Exzenters entgegengerichtet ist. Ein Fehler bei der Montage wird sicher vermieden, da das Ausgleichsgewicht nur in einer vorgegebenen Position fixierbar ist.A particularly advantageous embodiment of the invention provides that the positive connection is formed such that the balance weight can be fixed only in a predetermined position on the pump shaft. As a result, the installation of the balance weight on the pump shaft is greatly facilitated. The positive connection is designed such that the centrifugal force of the balance weight of Centrifugal force of the eccentric is opposite. An error during assembly is reliably avoided because the balance weight can only be fixed in a predetermined position.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, dass die Pumpenwelle einen fliegend gelagerten Endbereich aufweist, auf dem das Ausgleichsgewicht angeordnet ist. An dem fliegend gelagerten Endbereich der Pumpenwelle lässt sich besonders einfach ein Aufnahmeprofil für das Ausgleichsgewicht ausbilden. Das Ausgleichsgewicht kann dann sehr einfach auf den fliegend gelagerten Endbereich aufgesteckt werden. Damit sich das Ausgleichsgewicht nicht von der Pumpenwelle lösen kann, wird es bevorzug zusätzlich durch ein Sicherungselement gesichert. Zur Sicherung eignen sich beispielsweise Keile, die zwischen dem Ausgleichsgewicht und der Pumpenwelle eingetrieben werden. Hierzu weist die Welle und die Nabe eine Aufnahmenut auf. Durch die Aufnahmenut in beiden Bauteilen, ist die Einbaulage zueinander eindeutig vorgegeben.A further advantageous embodiment of the invention provides that the pump shaft has a cantilevered end portion on which the balance weight is arranged. At the end portion of the pump shaft, which is cantilevered, a receiving profile for the counterweight can be formed in a particularly simple manner. The balance weight can then be easily attached to the cantilevered end. Thus, the balance weight can not be detached from the pump shaft, it is Favor additionally secured by a securing element. For example, wedges which are driven between the balance weight and the pump shaft are suitable for securing. For this purpose, the shaft and the hub on a receiving groove. Through the receiving groove in both components, the mounting position is clearly defined to each other.
In einer besonders vorteilhaften Ausgestaltung der Erfindung ist der Rotor der Sperrflügelpumpe als Drehschieber ausgebildet. In der Vorförderpumpe ist dazu ein Einlauf sowie ein Ablauffenster ausgebildet, welches durch den als Drehschieber ausgebildeten Rotor geöffnet bzw. verschlossen wird. Somit kann auf zusätzliche Ein- und Auslassventile verzichtet werden, wodurch sich der Aufbau der Vorförderpumpe weiter vereinfacht.In a particularly advantageous embodiment of the invention, the rotor of the Sperrflügelpumpe is designed as a rotary valve. In the prefeed pump to an inlet and an outlet window is formed, which is opened or closed by the rotor designed as a rotary valve. Thus, it is possible to dispense with additional inlet and outlet valves, which further simplifies the construction of the prefeed pump.
In einer besonders vorteilhaften Ausgestaltung der Erfindung ist die Kraftstoffvorförderpumpe in das Pumpengehäuse der Radialkolbenhochdruckpumpe integriert. Die Integration der Kraftstoffvorförderpumpe erlaubt eine besonders kompakte Ausgestaltung der Pumpeneinheit.In a particularly advantageous embodiment of the invention, the fuel feed pump is integrated into the pump housing of the radial piston high-pressure pump. The integration of the fuel feed pump allows a particularly compact design of the pump unit.
Die erfindungsgemäße Radialkolbenpumpe zeichnet sich somit dadurch aus, dass das Ausgleichsgewicht zusätzlich als Rotor für eine Kraftstoffvorförderpumpe verwendet werden kann. Hierdurch lässt sich eine besonders preiswerte und einfach aufgebaute Pumpeneinheit, bestehend aus der Radialkolbenhochdruckpumpe und der Kraftstoffvorförderpumpe, ausbilden.The radial piston pump according to the invention is thus characterized by the fact that the counterweight can additionally be used as a rotor for a fuel feed pump. This makes it possible to form a particularly inexpensive and simply constructed pump unit, consisting of the radial piston high-pressure pump and the fuel priming pump.
Ausführungsbeispiele und weitere Vorteile der Erfindung werden im folgenden anhand der Zeichnungen erläutert. Es zeigt schematisch:
- Figur 1a
- einen Radialschnitt durch eine erfindungsgemäße Radialkolbenpumpeneinheit bestehend aus einer Radialkolbenpumpe und einer Vorförderpumpe,
- Figur 1b
- eine Detailansicht des Ausgleichsgewichtes wie es in
Figur 1a verwendet werden kann, - Figur 2a bis d
- eine Kraftstoffvorförderpumpe mit einem Ausgleichsgewicht nach
Figur 1b , das gleichzeitig als Rotor der Kraftstoffvorförderpumpe ausgebildet ist.
- FIG. 1a
- a radial section through a radial piston pump unit according to the invention consisting of a radial piston pump and a prefeed pump,
- FIG. 1b
- a detailed view of the balance weight as it is in
FIG. 1a can be used, - FIGS. 2a to d
- a fuel feed pump with a balance weight after
FIG. 1b , which is also designed as a rotor of the fuel feed pump.
Elemente gleicher Konstruktion und Funktion sind figurenübergreifend mit den gleichen Bezugszeichen versehen.Elements of the same construction and function are provided across the figures with the same reference numerals.
Um ein Lösen des Ausgleichsgewichtes 6 von dem fliegend gelagerten Endbereich 10 der Pumpenwelle 2 zu verhindern, wird das Ausgleichsgewicht zusätzlich mit einem Sicherungselement 13 gesichert. Das Sicherungselement 13 ist dabei bevorzugt in einer, sowohl in der Pumpenwelle als auch im Ausgleichsgewicht 6 ausgebildeten Nut eingebracht und verspannt die beiden Bauteile miteinander. Hierzu eignen sich insbesondere Keile.
Die sowohl im Ausgleichsgewicht 6 als auch in der Pumpenwelle ausgebildete Nut sorgt zusätzlich dafür, dass das Ausgleichsgewicht 6 nur in einer Position auf die Pumpenwelle 2 aufgesteckt werden kann. Hierdurch können Montagefehler vermieden werden und das Ausgleichsgewicht 6 wird stets richtig zum Exzenterabschnitt 3 der Pumpenwelle 2 ausgerichtet.In order to prevent a loosening of the balance weight 6 of the
The trained both in the balance weight 6 and in the pump shaft groove also ensures that the balance weight 6 can be attached only in one position on the
Das Ausgleichsgewicht 6 weist dabei die gleiche Exzentrizität wie der Exzenterabschnitt 3 der Pumpenwelle 2 auf. Das Ausgleichsgewicht 6 ist dabei jedoch gegenüber dem Exzenter um 180°, verschoben auf der Pumpenwelle 2 angeordnet. Hierdurch erzeugt das Ausgleichsgewicht 6 während des Pumpenbetriebs eine Fliehkraft, die der Fliehkraft des Exzenters entgegenwirkt. Die Fliehkräfte heben sich dadurch auf, wodurch Drehschwingungen der Pumpe wirksam vermieden werden.The balance weight 6 has the same eccentricity as the
Die Ausgleichsmasse des Ausgleichsgewichts 6 kann über die Exzentrizität s des Ausgleichsgewichtes 6 sowie die Dicke bzw. den Durchmesser des Ausgleichsgewichtes 6 festgelegt werden.The balancing weight of the balancing weight 6 can be determined via the eccentricity s of the balancing weight 6 and the thickness or the diameter of the balancing weight 6.
Selbstverständlich ist auch möglich, dass das Ausgleichsgewicht 6 nicht an einem fliegend gelagerten Endbereich 10 befestigt wird, sondern vor der Montage auf die Pumpenwelle 2 aufgeschoben wird. Die fliegend gelagerte Endbereich ermöglicht allerdings eine besonders einfache Montage des Ausgleichsgewichtes 6 nach dem Zusammenbau von Pumpengehäuse und Pumpenwelle.Of course, it is also possible that the balance weight 6 is not attached to a
Wie Anhand der
Nachfolgend wird an den
In
In
In
In
In
Neben einer Ausbildung der Kraftstoffvorförderpumpe als Sperrflügelpumpe sind auch andere Ausführungen denkbar. So ist es beispielsweise auch denkbar, den Rotor mit mehreren verschiebbaren Flügeln auszubilden und die Pumpe als Flügelzellenpumpe zu betreiben.In addition to a training of Kraftstoffvorförderpumpe as Sperrflügelpumpe other designs are conceivable. For example, it is also conceivable to design the rotor with several displaceable wings and to operate the pump as a vane-cell pump.
Zusammenfassend lässt sich somit feststellen, dass durch die Verwendung eines Ausgleichsgewichtes, welches an der Pumpenwelle angeordnet ist eine Umwucht der Pumpenwelle aufgrund eines an der Pumpenwelle ausgebildeten Exzenterabschnittes vermieden werden kann. Hierdurch können Drehschwingungen der Pumpe wirkungsvoll unterbunden werden. Das Ausgleichsgewicht kann dabei vorteilhaft gleichzeitig als Rotor für eine Kraftstoffvorförderpumpe verwendet werden. Als Kraftstoffvorförderpumpe eignet sich insbesondere eine Sperrflügelpumpe mit einem feststehenden Sperrflügel. Das Pumpengehäuse kann direkt in einen Pumpendeckel des Pumpengehäuses ausgebildet sein. Die vorgeschlagene Radialkolbenpumpe eignet sich insbesondere zur Kraftstoffhochdruckerzeugung in modernen Common-Rail-Einspritzsystemen. In summary, it can thus be stated that by using a balance weight, which is arranged on the pump shaft, an imbalance of the pump shaft due to an eccentric portion formed on the pump shaft can be avoided. As a result, torsional vibrations of the pump can be effectively prevented. The balancing weight can advantageously be used simultaneously as a rotor for a fuel priming pump. As Kraftstoffvorförderpumpe is particularly suitable a Sperrflügelpumpe with a fixed barrier wing. The pump housing may be formed directly in a pump cover of the pump housing. The proposed radial piston pump is particularly suitable for high-pressure fuel generation in modern common-rail injection systems.
Claims (8)
- Radial pump, in particular radial pump for producing high pressure fuel, having a pump housing (1) in which a pump shaft (2) is rotatably mounted with an eccentric segment (3) and having at least one pump piston (4) driven by the pump shaft (2), said pump piston being arranged to be moveable to and fro in a pump cylinder (5) radially to the pump shaft (2), with a balancing weight (6) being arranged on the pump shaft (2), said balancing weight counteracting an unbalance of the pump shaft (2) during the pump operation, characterised in that the balancing weight (6) is simultaneously a rotor (8) of a blocking semi-rotary pump, which functions as a pre-feed fuel pump (9).
- Radial pump according to claim 1, characterised in that the balancing weight (6) has the same eccentricity (e) as the eccentric segment (3) of the pump shaft (2).
- Radial pump according to claim 1 or 2, characterised in that the balancing weight (6) is connected to the pump shaft (2) by way of a hub-shaft connection (7).
- Radial pump according to claim 3, characterised in that the hub-shaft connection (7) is designed as a form-fit connection.
- Radial pump according to claim 4, characterised in that the form-fit connection is designed such that the balancing weight (6) can only be fixed to the pump shaft (2) in a predetermined position.
- Radial pump according to one of the preceding claims, characterised in that the pump shaft (2) comprises an overhung end region (10), upon which the balancing weight (6) is arranged.
- Radial pump according to one of the preceding claims, characterised in that the rotor (8) of the locking semi-rotary pump is embodied as a rotary valve.
- Radial pump according to one of the preceding claims, characterised in that the pre-feed fuel pump (9) is integrated into the pump housing (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004023195 | 2004-05-11 | ||
DE200410023195 DE102004023195B4 (en) | 2004-05-11 | 2004-05-11 | Radial piston pump with balance weight |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1596065A1 EP1596065A1 (en) | 2005-11-16 |
EP1596065B1 true EP1596065B1 (en) | 2008-04-02 |
Family
ID=34939649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050103658 Expired - Fee Related EP1596065B1 (en) | 2004-05-11 | 2005-05-03 | Radial pump with balancing weight |
Country Status (2)
Country | Link |
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EP (1) | EP1596065B1 (en) |
DE (2) | DE102004023195B4 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04219472A (en) * | 1990-12-19 | 1992-08-10 | Aisin Seiki Co Ltd | Radial plunger pump |
DE19848035A1 (en) * | 1998-10-17 | 2000-04-20 | Bosch Gmbh Robert | Radial piston pump for high fuel pressure in IC engines with common-rail injection system has suction valve closure spring supported on pump piston and contained in long piston bore |
DE19953248A1 (en) * | 1999-11-04 | 2001-05-23 | Luk Fahrzeug Hydraulik | Radial piston pump |
DE10210300B4 (en) * | 2002-03-08 | 2008-11-20 | Robert Bosch Gmbh | Pump element for a high-pressure pump and high-pressure pump with controllable flow rate |
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2004
- 2004-05-11 DE DE200410023195 patent/DE102004023195B4/en not_active Expired - Fee Related
-
2005
- 2005-05-03 EP EP20050103658 patent/EP1596065B1/en not_active Expired - Fee Related
- 2005-05-03 DE DE200550003525 patent/DE502005003525D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1596065A1 (en) | 2005-11-16 |
DE102004023195A1 (en) | 2005-12-08 |
DE502005003525D1 (en) | 2008-05-15 |
DE102004023195B4 (en) | 2006-06-14 |
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