EP1596065A1 - Radialkolbenpumpe mit Ausgleichsgewicht - Google Patents
Radialkolbenpumpe mit Ausgleichsgewicht Download PDFInfo
- Publication number
- EP1596065A1 EP1596065A1 EP05103658A EP05103658A EP1596065A1 EP 1596065 A1 EP1596065 A1 EP 1596065A1 EP 05103658 A EP05103658 A EP 05103658A EP 05103658 A EP05103658 A EP 05103658A EP 1596065 A1 EP1596065 A1 EP 1596065A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- shaft
- balance weight
- radial piston
- pump shaft
- 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.)
- Granted
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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 an in a drive shaft mounted on a pump housing and at least a driven by the drive shaft pump unit.
- the radial piston pump has a pump housing in which a pump shaft is rotatable is stored. At the pump shaft is an eccentric section formed on which a cam ring is slidably guided. To the Hubring preferably support several, with respect to the drive shaft radially movably guided in the pump housing Pump piston off.
- Each pump piston is a suction valve as well associated with a pressure valve. During the intake stroke is the Pump cylinder supplied fuel from the low pressure area. After the compression stroke reaches the compressed Fuel via the pressure valve to a common high-pressure accumulator, the so-called common rail.
- Such a radial piston pump is usually a Pre-fuel pump upstream, which is the fuel from the fuel tank to the high pressure pump supplies.
- the fuel feed pump is usually powered by an electric motor or driven by the camshaft.
- the invention is characterized in that on the pump shaft a balance weight is arranged, which is an imbalance counteracts the pump shaft during pump operation.
- the balance weight is designed such that it generates a centrifugal force in pump operation, the Centrifugal force of the eccentric counteracts. hereby The centrifugal forces cancel each other and the torsional vibrations the pump are effectively prevented.
- the Centrifugal force of the balance weight can be over the Mass of the balance weight as well as the eccentricity of the Determine the balance weight to the pump shaft axis.
- the balance weight preferably has the same Eccentricity on as the eccentric portion of the pump shaft.
- the mass of the balance weight can then be across the thickness or set the outer circumference of the balance weight become.
- An advantageous embodiment of the invention provides that the balance weight with the pump shaft via a shaft-hub connection connected is. Shaft-hub connections can be easily manufactured and ensure a safe 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 sees before that the positive connection is formed in such a way is that the balance weight only in a predetermined position can be fixed on the pump shaft. This will be the Installation of the balance weight on the pump shaft considerably facilitated.
- the positive connection is such designed that the centrifugal force of the balance weight of the Centrifugal force of the eccentric is opposite. An error during assembly is safely avoided because the balance weight can only be fixed in a predetermined position.
- a further advantageous embodiment of the invention provides in that the pump shaft has a cantilevered End Schemet having arranged on the balance weight is.
- the pump shaft has a cantilevered End Schemet having arranged on the balance weight is.
- the cantilever end of the pump shaft it is particularly easy to take a recording profile for the balance weight form.
- the balance weight can then very simply attached to the cantilevered end area become. So that the balance weight does not differ from the Pump shaft can solve, it is Favor additionally by a Secured fuse element.
- a Secured fuse element are suitable for backup Wedges between the balance weight and the Pump shaft to be driven.
- the shaft and the hub has a receiving groove. Through the receiving groove in both Components, the installation position is clearly specified to each other.
- a further advantageous embodiment of the invention provides before that the balance weight at the same time a rotor for a fuel feed pump is.
- This allows the prefeed pump structurally arranged very close to the radial piston pump be, resulting in a particularly compact design.
- the pre-feed pump can be controlled by a special produce a small number of components, which facilitates assembly and significantly reduced the manufacturing costs.
- the fuel feed pump is as Paddlewheel pump formed.
- the Sperrwügelpumpe is suitable especially because of its simple structure.
- the Sperrwügelpumpe consists essentially only of an outer ring with a mostly spring-loaded, fixed blocking wing and the counterweight designed as a rotor.
- the pre-feed pump can thus be particularly inexpensive and easy form.
- the rotor of the Sperrwügelpumpe is designed as a rotary valve.
- the prefeed pump is an inlet and an outlet window formed, which by the as a rotary valve trained rotor is opened or closed. Consequently can be dispensed with additional intake and exhaust valves, thereby further simplifying the construction of the prefeed pump.
- Fuel feed pump in the pump housing of the radial piston high pressure pump integrated.
- the integration of Fuel feed pump allows a particularly compact design the pump unit.
- the radial piston pump according to the invention is thus distinguished on the one hand characterized in that on the pump shaft, a balance weight is arranged, which is an imbalance of the pump shaft counteracts during pump operation.
- the balance weight as a rotor for a Fuel feed pump can be used. This leaves a particularly inexpensive and simply constructed pump unit, consisting of the radial piston high-pressure pump and the Fuel feed pump, train.
- FIG. 1a shows a radial section through the radial piston high-pressure pump.
- the radial piston high pressure pump consists essentially from a pump housing 1, in which a pump shaft 2 is arranged rotatably mounted.
- the pump shaft 2 has an eccentric section 3.
- On the eccentric section 3 a cam ring 11 is slidably mounted.
- the lifting ring 11 has one of the number of pump piston 4 corresponding number of Flattening up.
- the pump pistons 4 are supported by sliding shoes 12 at the flattenings of the cam ring 11 from.
- the pump pistons 4 are during the pump operation of the eccentric section the pump shaft 2 in the pump cylinder 5 back and reciprocated. They lead alternately a suction and a Compression stroke through.
- the pump shaft 2 has a flying stored end portion 10 on.
- the cantilevered end area 10 has two flats 7 for positive recording serve a balance weight 6.
- the balance weight 6 has a breakthrough, one to the overhung End region 10 has corresponding shape, so that a positive connection between the cantilevered End portion 10 and the balance weight 8 is.
- the balance weight in addition to a securing element 13 secured.
- the securing element 13 is preferably in one, both in the pump shaft and in the balance weight 6 trained groove introduced and braced the two Components with each other. Particularly suitable for this purpose Wedges. Both in the balance weight 6 and in the pump shaft trained groove additionally ensures that the balance weight 6 attached only in one position on the pump shaft 2 can be. As a result, assembly errors can be avoided be and the balance weight 6 is always correct to Exzenterabêt 3 of the pump shaft 2 aligned.
- the balance weight 6 has the same eccentricity as the eccentric portion 3 of the pump shaft 2.
- the balance weight 6 is, however, to the eccentric order 180 °, shifted on the pump shaft 2 arranged. hereby generates the balance weight 6 during pump operation a centrifugal force that counteracts the centrifugal force of the eccentric. The centrifugal forces cancel each other out, resulting in torsional vibrations the pump can be effectively avoided.
- the balancing weight of the balance weight 6 can on the Eccentricity s of the balance weight 6 and the thickness or set the diameter of the balance weight 6 become.
- balance weight 6 not attached to a cantilevered end portion 10 is, but before mounting on the pump shaft. 2 is postponed.
- the cantilevered end allows However, a particularly simple installation of the balance weight 6 after assembly of pump housing and Pump shaft.
- the balance weight 6 simultaneously as a rotor 8 for a fuel priming pump 9 can be used.
- the fuel feed pump 9 consists essentially of the rotor 8 designed as Balance weight 6, an outer ring 15 and a fixed blocking wing 16.
- At the front of the fuel priming pump 9 is an inlet and an outlet window 17, 18 are formed, through which the fluid flow in or out can.
- the pump chamber 19 results from the eccentric Arrangement of the rotor 8 with respect to the outer ring 15. As a result creates a sickle-shaped pump chamber 19, which with the rotation of the drive shaft 2 and the rotor 8 along the scope moves.
- the barrier wing 16 is opposed by a spring 20 pressed the rotor 8 and thereby seals the inlet side and the outlet side of the pump chamber against each other.
- the rotor has by another 90 ° against the Turned clockwise.
- the flow window 18 continues to open, allowing fuel from the fuel priming pump 9 is promoted.
- the rotor 8 already the inlet window 17 is released so that fuel to flow into a part of the sickle-shaped pump chamber 19 can.
- the inlet and the outlet side through the Barrier wing 16 separated from each other.
- the rotor 8 has an additional 90 ° with respect to Turned clockwise, allowing it to 270 ° to its initial position is twisted. In this position is the flow window 18 almost completely closed again so that no fuel escapes from the pump. The inlet window 17, however, is almost completely released by the rotor 8 so that a maximum amount of fuel in the crescent-shaped Pumping area 19 can flow. After another Rotation of the pump shaft 8 by 90 ° is a total working stroke completed the Sperrwügelpumpe.
- the balance weight can be advantageous at the same time as a rotor for a fuel priming pump be used.
- fuel priming pump is particularly suitable for a Sperrwügelpumpe with a fixed barrier wing.
- the pump housing can be directly formed in a pump cover of the pump housing be.
- the proposed radial piston pump is particularly suitable for high-pressure fuel generation in modern common-rail injection systems.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Es ist auch möglich die formschlüssige Verbindung zwischen dem Ausgleichsgewicht und der Pumpenwelle durch zusätzliche Elemente wie Passfedern, Gleitfeder oder Querstifte formschlüssig zu verbinden.
- 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.
In Figur 2a befindet sich der Rotor 8 in seiner oberen Ausgangsstellung. Dabei ist das Ablauffenster 18 vollständig vom Rotor 8 verschlossen, so dass kein Kraftstoff aus dem sichelförmigen Pumpenraum 19 ausströmen kann. Das Einlauffenster 17 ist dagegen nicht vollständig vom Rotor 8 verschlossen und Kraftstoff kann durch das Einlauffenster 17 in den sichelförmigen Pumpenraum 19 einströmen.
Claims (10)
- Radialkolbenpumpe, insbesondere Radialkolbenpumpe für die Kraftstoffhochdruckerzeugung, mit einem Pumpengehäuse (1), in dem eine Pumpenwelle (2) mit einem Exzenterabschnitt (3) drehbar gelagert ist und mit wenigstens einem von der Pumpenwelle (2) angetriebenen Pumpenkolben (4), der in einem Pumpenzylinder (5) radial zur Pumpenwelle (2) hin- und her bewegbar angeordnet ist,
dadurch gekennzeichnet, dass
auf der Pumpenwelle (2) ein Ausgleichsgewicht (6) angeordnet ist, welches einer Unwucht der Pumpenwelle (2) während des Pumpenbetriebs entgegenwirkt. - Radialkolbenpumpe nach Anspruch 1,
dadurch gekennzeichnet, dass
das Ausgleichsgewicht (6) die selbe Exzentrizität (e) aufweist wie der Exzenterabschnitt (3) der Pumpenwelle (2) . - Radialkolbenpumpe nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
das Ausgleichsgewicht (6) mit der Pumpenwelle (2) über eine Wellen-Naben-Verbindung (7) verbunden ist. - Radialkolbenpumpe nach Anspruch 3,
dadurch gekennzeichnet, dass
die Wellen-Naben-Verbindung (7) als formschlüssige Verbindung ausgebildet ist. - Radialkolbenpumpe nach Anspruch 4,
dadurch gekennzeichnet, dass
die formschlüssige Verbindung derart ausgebildet ist, dass das Ausgleichsgewicht (6) nur in einer vorgegebenen Position auf der Pumpenwelle (2) fixierbar ist. - Radialkolbenpumpe nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass
die Pumpenwelle (2) einen fliegend gelagerten Endbereich (10) aufweist, auf dem das Ausgleichsgewicht (6) angeordnet ist. - Radialkolbenpumpe nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass
das Ausgleichsgewicht (6) gleichzeitig ein Rotor (8) für eine Kraftstoffvorförderpumpe (9) ist. - Radialkolbenpumpe nach Anspruch 7,
dadurch gekennzeichnet, dass
die Kraftstoffvorförderpumpe (9) eine Sperrflügelpumpe ist. - Radialkolbenpumpe nach Anspruch 8,
dadurch gekennzeichnet, dass
der Rotor (8) der Sperrflügelpumpe als Drehschieber ausgebildet ist. - Radialkolbenpumpe nach Anspruch 7 oder 8,
dadurch gekennzeichnet, dass
die Kraftstoffvorförderpumpe (9) in dass Pumpengehäuse (1) integriert ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004023195 | 2004-05-11 | ||
DE200410023195 DE102004023195B4 (de) | 2004-05-11 | 2004-05-11 | Radialkolbenpumpe mit Ausgleichsgewicht |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1596065A1 true EP1596065A1 (de) | 2005-11-16 |
EP1596065B1 EP1596065B1 (de) | 2008-04-02 |
Family
ID=34939649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050103658 Expired - Fee Related EP1596065B1 (de) | 2004-05-11 | 2005-05-03 | Radialkolbenpumpe mit Ausgleichsgewicht |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1596065B1 (de) |
DE (2) | DE102004023195B4 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5207771A (en) * | 1990-12-19 | 1993-05-04 | Aisin Seiki Kabushiki Kaisha | Radial plunger type pump with counter weight and washer integrally secured |
DE19848035A1 (de) * | 1998-10-17 | 2000-04-20 | Bosch Gmbh Robert | Radialkolbenpumpe für Kraftstoffhochdruckerzeugung |
DE19953248A1 (de) * | 1999-11-04 | 2001-05-23 | Luk Fahrzeug Hydraulik | Radialkolbenpumpe |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10210300B4 (de) * | 2002-03-08 | 2008-11-20 | Robert Bosch Gmbh | Pumpenelement für eine Hochdruckpumpe und Hochdruckpumpe mit steuerbarer Fördermenge |
-
2004
- 2004-05-11 DE DE200410023195 patent/DE102004023195B4/de not_active Expired - Fee Related
-
2005
- 2005-05-03 DE DE200550003525 patent/DE502005003525D1/de not_active Expired - Fee Related
- 2005-05-03 EP EP20050103658 patent/EP1596065B1/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5207771A (en) * | 1990-12-19 | 1993-05-04 | Aisin Seiki Kabushiki Kaisha | Radial plunger type pump with counter weight and washer integrally secured |
DE19848035A1 (de) * | 1998-10-17 | 2000-04-20 | Bosch Gmbh Robert | Radialkolbenpumpe für Kraftstoffhochdruckerzeugung |
DE19953248A1 (de) * | 1999-11-04 | 2001-05-23 | Luk Fahrzeug Hydraulik | Radialkolbenpumpe |
Also Published As
Publication number | Publication date |
---|---|
EP1596065B1 (de) | 2008-04-02 |
DE102004023195A1 (de) | 2005-12-08 |
DE502005003525D1 (de) | 2008-05-15 |
DE102004023195B4 (de) | 2006-06-14 |
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