EP1022461B1 - Hochdruckpumpe - Google Patents
Hochdruckpumpe Download PDFInfo
- Publication number
- EP1022461B1 EP1022461B1 EP00100848A EP00100848A EP1022461B1 EP 1022461 B1 EP1022461 B1 EP 1022461B1 EP 00100848 A EP00100848 A EP 00100848A EP 00100848 A EP00100848 A EP 00100848A EP 1022461 B1 EP1022461 B1 EP 1022461B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pressure pump
- pump
- accordance
- secondary piston
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—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
- F04B1/0439—Supporting or guiding means for the pistons
Definitions
- the invention relates to a high-pressure pump, in particular a radial piston pump according to the claim 1.
- Radial piston pumps are used to generate high pressures, For example, as a high-pressure fuel pump in common-rail injection systems used. These pumps stand out due to low leakage and high volumetric efficiency from, with the comparatively simple constructive Construction it allows sealing gaps with those for minimization the leakage required to carry out manufacturing tolerances.
- DE 195 07 295 A1 discloses a high-pressure pump, in particular a radial piston pump, with at least one driven by a drive shaft pump unit with a Displacer housing 30 in which a piston 2 is guided axially displaceable, with a Sliding 62 abuts an eccentric ring, the one, the piston 2 at least partially encompassing at a distance, guided in the displacer housing 30 and in a Plant position biased support piston 34 is supported.
- piston 2 does not attack any return device (holding device), the piston 2 is located rather loosely on the shoe 62.
- the support piston is hydraulically controlled.
- a holding device 40 via which the extension movement of the Support piston 24 can be transferred to the piston 12.
- US A 5,752,430 discloses a high pressure pump, in particular radial piston pump, with at least one driven by a drive shaft 100 pump unit with a Displacer housing 21 in which a piston 14 is guided axially displaceable.
- the pump unit has a shoe 37 and a support piston 36 which are integral with each other are trained Since it is the slide shoe 37 and the support piston 36 is a component, of course, not the a component (support piston) to be biased against the other component (shoe), as this The subject of the present invention is.
- DE 197 27 29 4 A1 shows a high pressure pump, for example, three or five of one Eccentric shaft driven pumping units in a pump housing are included.
- Each of the pumping units has an in a positive displacement piston guided over a Slide shoe rests on an eccentric ring, which rotates an eccentric of the eccentric shaft is mounted. It lies the shoe on a flattening of the eccentric ring.
- the eccentric ring shifted with the flattening perpendicular to the piston axis, so that a corresponding relative movement and the associated Friction between the sliding block and the eccentric ring arises.
- this relative movement and the associated friction between the eccentric ring and shoe for tilting the eccentric ring and thus lead to destruction of the pump.
- a support piston in the displacer housing stored which surrounds the piston in the distance and biased by a compression spring against the eccentric ring is, so that a tilting or twisting of the eccentric ring is practically excluded.
- the piston via a retaining washer with the support piston connected so that the piston extract, i. the movement of the piston in the radial direction inward substantially caused by the coupling to the support piston, biased by the compression spring against the eccentric ring becomes.
- the invention is based on the object to create a high-pressure pump in which the wear is reduced.
- the support piston not as in State of the art - on the eccentric ring but on the Slider supported, so that there is no significant relative movement transverse to the support piston axis in the contact area of the support piston can come. That is, the supporting force of the Support piston is on the slide shoe on the eccentric ring transferred, with the relative movement between shoe and eccentric ring does not matter, since the shoe in terms his choice of material to an optimal anyway Slipperiness and abrasion resistance is selected.
- the invention covers exemplary embodiments, in which the Supporting piston directly is supported on the shoe.
- the support piston with a driving shoulder is executed, which is to transfer the extension movement on the piston in contact with the holding device can be brought.
- This holding device is advantageously as Holding disk designed with a hub-shaped central portion is placed on the piston and the peripheral portion to the piston extract in contact with the support piston can be brought.
- the Support piston directly on the shoe on.
- the support piston is preferably with a radial shoulder provided, in which the peripheral portion the retaining disk dives, so that this in the piston extraction movement (radially inward) of the support piston is taken.
- the shoe is very easy to install, if he means of a locking ring in a frontal Recording of the support piston is fixed.
- the holding disc is preferably pressed onto the piston.
- the contact pressure of the sliding shoe on the eccentric ring can be optimized even at high speeds, by providing breakthroughs in the support piston, can be introduced via the pressure medium in a pressure chamber to also to bias the shoe hydraulically against the eccentric ring.
- Figure 1 shows a rear view of a feed pump 1, such as For example, in common rail fuel injection systems is used for internal combustion engines.
- a feed pump such as For example, in common rail fuel injection systems is used for internal combustion engines.
- a high pressure pump to pressurize the fuel with Pressing up to 2000 bar are usually radial piston pumps used in which several pumping units, for example three pumping units 2a, 2b, 2c in a pump housing 4 are included.
- FIG. 2 shows a partial view of a section through the radial piston pump according to FIG. 1 along the line A-A. Accordingly, each pump unit 2 has a displacer housing 6 with a cylinder head 8 and in the radial direction extending inwardly, relative to the cylinder head 8 radially recessed cylinder 10, which is in the pump housing 4 dips.
- the eccentric ring 16 is on a sliding bush 18 an eccentric 20 of a drive shaft 22 mounted, in turn About slide bearing in the pump housing 4 is performed.
- a suction channel 28 In the cylinder head is a suction channel 28 with a suction valve 30 arranged over which the pressure medium (fuel) can be fed.
- Pressure side is a pressure channel 32 in the cylinder head 8 is provided which leads to a pressure valve 34, in the parting plane between the cylinder head 8 and a Mounting flange of the pump housing 4 is arranged.
- the output of the pressure valve 34 is via a pump housing side Pressure channel 36 with a not shown Connected to the manifold of the three pumping units 2a, 2b, 2c promoted pressure medium (fuel) a Consumable, in the present case fed to a common rail is.
- the suction connection of the pump is via a pump housing side Suction channel 38 with the input of the suction valve 30th connected.
- the pressure valve 34 and the suction valve 30 are both as spring-loaded seat valves, in particular as Check valves executed.
- the piston 12 is connected via a retaining disk with the support piston 24 connected so that a pull-out movement of the support piston 24 to the axis 42 of the drive shaft 22 toward the introduction a suction stroke is transmitted to the piston 12.
- FIG. 3 shows the contact area of the support piston 24 shown on the shoe 14 in an enlarged view, wherein the drawing part shown on the left of the piston axis 44 a first embodiment and the right of the Piston axis 44 shown drawing part another Embodiment show.
- Cylinder 10 has a cylinder bore 46 in which the Piston 12 is guided.
- the cylinder bore 46 is in the mouth area radially expanded, so that an annular space 48 is formed is from the piston 12, the shoe 14 and the Support piston 24 is limited.
- the retaining washer 40 has a hub-shaped projection 50, with which they on the bottom in Figure 3 end portion of the piston 12 is pressed.
- the hub-shaped projection 50 dips into the annulus 48 on.
- the lower in Figure 3 end face of the retaining disc Aligns approximately with the adjacent end face of the piston 12, so that this and the retaining plate 40 flat on the Sliding shoe.
- An outer peripheral portion 56 of the retaining washer 40 extends into the receptacle 54, so that the support piston 24 with an annular end face 58 on the retaining disc 40 and this in turn rests on the shoe 14. that is, in the embodiment shown on the left is based the support piston 24 via the drive plate 40 on the Slide shoe 14 off. This is about one in an annular groove the recording 54 recorded circlip 60 in the axial direction secured to a shoulder of the shoe 14 is present. This shoulder is characterized by a demotion of the formed frontal support surface 62 of the shoe 14, so that the bearing surface of the shoe 62 is slightly reduced becomes. However, this is accepted as the Assembly of the shoe 14 by inserting the mounting ring 60 is considerably simplified.
- annular skirt of the support piston 24 In the annular skirt of the support piston 24 are two axiallybabstandete Breakthroughs 64, 66 formed by the lower Outer peripheral edge 68 of the cylinder 10 in succession on or are zuu Kunststoffbar.
- the openings 64, 66 open in the region of the spring chamber of the support piston 24, with Pressure medium (for example, fuel) is filled. that is, through the apertures opened over the peripheral edge 68 64 and 66 can enter pressure medium in the annular space 48 and the retaining washer 40 and the shoe 14 in the direction biasing on the eccentric ring 16.
- Pressure medium for example, fuel
- FIG. 3 shows an improved right of the central axis 44 Embodiment, which is substantially different from the above Embodiment differs in that the Support piston 24 not on the retaining plate 40 but directly is supported on the shoe 14.
- the support piston 24 has a Radial shoulder 70, the outer periphery of the retaining washer 40th surrounds and rests on the shoe 62.
- the holding disc 40 associated annular end face 58 is formed, that they with a minimal gap to the retaining disc 40 stands, so that virtually no support force on the retaining disc 40 is introduced into the shoe 14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
Claims (7)
- Hochdruckpumpe, insbesondere Radialkolbenpumpe mit zumindest einer von einer Antriebswelle (22) angetriebenen Pumpeinheit (2), mit einem Verdrängergehäuse (6), in dem ein Kolben (12) axialverschiebbar geführt ist, der mit einem Gleitschuh (14) an einem Exzenterring (16) anliegt, der über einen den Kolben (12) zumindest abschnittsweise im Abstand umgreifenden, im Verdrängergehäuse (6) geführten und in eine Anlageposition vorgespannten Stützkolben (24) abgestützt ist, wobei die Auszugsbewegung des Stützkolbens (24) über eine Halteeinrichtung (40) auf den Kolben (12) übertragbar ist, und wobei der Stützkolben (24) direkt gegen den Gleitschuh (14) vorgespannt ist.
- Hochdruckpumpe nach Patentanspruch 1, dadurch gekennzeichnet, daß der Stützkolben (24) eine Mitnahmeschulter (58) hat, die zur Übertragung der Auszugsbewegung in Anlage an die Halteeinrichtung (40) bringbar ist.
- Hochdruckpumpe nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß die Halteeinrichtung eine Haltescheibe (40) ist, die mit einem nabenförmigen Abschnitt (50) mit dem Kolben (12) verbunden ist und deren Umfangsabschnitt (56) zum Kolbenauszug in Anlage an dem Stützkolben (24) steht.
- Hochdruckpumpe nach Patentanspruch 2, dadurch gekennzeichnet, daß der Stützkolben (24) im Anlagebereich an den Gleitschuh (14) eine Radialstufe hat, in die ein Umfangsabschnitt (56) der Haltescheibe (40) eintaucht.
- Hochdruckpumpe nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß der Stützkolben (24) eine Aufnahme (54) zur stirnseitigen Abstützung des Gleitschuhs (14) hat, wobei in einer Ringnut in der Umfangswandung der Aufnahme (54) ein Befestigungsring (60) zur Axialfestlegung des Gleitschuhs (14) angeordnet ist.
- Hochdruckpumpe nach einem der Patentansprüche 3 bis 5, dadurch gekennzeichnet, daß die Haltescheibe (40) auf den Kolben (12) aufgepreßt ist.
- Hochdruckpumpe nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß in der Wandung des Stützkolbens (24) zumindest ein Durchbruch (64, 66) vorgesehen ist, der während der Axialbewegung des Stützkolbens (24) aufsteuerbar ist, so daß Druckmittel in einen an den Gleitschuh (24) angrenzenden Druckraum (48) einleitbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19902324 | 1999-01-21 | ||
DE19902324A DE19902324A1 (de) | 1999-01-21 | 1999-01-21 | Hochdruckpumpe |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1022461A2 EP1022461A2 (de) | 2000-07-26 |
EP1022461A3 EP1022461A3 (de) | 2001-01-03 |
EP1022461B1 true EP1022461B1 (de) | 2004-10-06 |
Family
ID=7894979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00100848A Expired - Lifetime EP1022461B1 (de) | 1999-01-21 | 2000-01-17 | Hochdruckpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1022461B1 (de) |
DE (2) | DE19902324A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10300144B3 (de) * | 2003-01-07 | 2004-05-19 | Siemens Ag | Radialkolbenpumpe |
DE102004053270A1 (de) * | 2004-11-04 | 2006-05-11 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
DE102006042765A1 (de) * | 2006-09-12 | 2008-03-27 | Siemens Ag | Niederhalter für Hochdruckkolben, Anordnung und Verwendung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19507295B4 (de) * | 1995-03-02 | 2004-09-02 | Siemens Ag | Radialkolbenpumpe, insbesondere Kraftstoffpumpe für einen Verbrennungsmotor |
EP0816675B1 (de) * | 1996-07-01 | 2002-04-10 | Mannesmann Rexroth AG | Vorrichtung zur Stabilisierung des Exzenterrings einer Radialkolbenpumpe |
JPH1030525A (ja) * | 1996-07-16 | 1998-02-03 | Denso Corp | 高圧サプライポンプ |
DE19727294A1 (de) | 1997-06-27 | 1999-01-07 | Saarbergwerke Ag | Behälter für Fluide |
DE19943160A1 (de) * | 1998-09-10 | 2000-03-16 | Denso Corp | Kraftstoffeinspritzpumpe |
-
1999
- 1999-01-21 DE DE19902324A patent/DE19902324A1/de not_active Withdrawn
-
2000
- 2000-01-17 DE DE50008042T patent/DE50008042D1/de not_active Expired - Lifetime
- 2000-01-17 EP EP00100848A patent/EP1022461B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19902324A1 (de) | 2000-07-27 |
DE50008042D1 (de) | 2004-11-11 |
EP1022461A3 (de) | 2001-01-03 |
EP1022461A2 (de) | 2000-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1760312B1 (de) | Hochdruckpumpe | |
DE112011105490B4 (de) | Kraftstoffpumpe | |
DE10118754B4 (de) | Hochdruckpumpe | |
DE102004013244A1 (de) | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine | |
WO1998058172A1 (de) | Radialkolbenpumpe | |
DE10212492B4 (de) | Kolbenpumpe | |
DE112018005595T5 (de) | Kraftstoffzuführpumpe | |
EP2825773B1 (de) | Steckpumpe | |
EP0931219A1 (de) | Kraftstoffhochdruckpumpe | |
DE3232083A1 (de) | Radialkolbenpumpe | |
EP1022461B1 (de) | Hochdruckpumpe | |
DE4001335C1 (en) | High-pressure plunger pump - incorporates adjustable sleeve and disc-types inlet valve | |
EP1047876B1 (de) | Radialkolbenpumpe zur kraftstoffhochdruckversorgung | |
DE102008015547A1 (de) | Hochdruckpumpe | |
DE19725564C2 (de) | Radialkolbenpumpe | |
DE102016211245A1 (de) | Kolben-Fluidpumpe | |
DE102014224724A1 (de) | Hochdruckpumpe | |
EP0985093B1 (de) | Radialkolbenpumpe | |
EP1798415B1 (de) | Hochdruckpumpe | |
DE19946842C2 (de) | Hochdruckpumpe | |
DE102016224347A1 (de) | Pumpe, insbesondere Hochdruckpumpe eines Kraftstoffeinspritzsystems, mit einer Stößel-Baugruppe die eine Verdrehsicherung und eine Schmierstoffversor- gung der Laufrolle durch einen verlängerten Lagerbolzen aufweist | |
DE19701392A1 (de) | Radialkolbenpumpe | |
DE102015218054A1 (de) | Ventil, insbesondere Saugventil, in einer Hochdruckpumpe eines Kraftstoffeinspritzsystems | |
WO2016008626A1 (de) | Pumpe, insbesondere kraftstoffhochdruckpumpe für eine kraftstoffeinspritzeinrichtung einer brennkraftmaschine | |
DE1009487B (de) | Hochdruckkolbenpumpe mit Exzenterantrieb |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20010305 |
|
AKX | Designation fees paid |
Free format text: DE FR GB IT |
|
17Q | First examination report despatched |
Effective date: 20030901 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
REF | Corresponds to: |
Ref document number: 50008042 Country of ref document: DE Date of ref document: 20041111 Kind code of ref document: P |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
ET | Fr: translation filed | ||
26N | No opposition filed |
Effective date: 20050707 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E Free format text: REGISTERED BETWEEN 20110825 AND 20110831 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20150128 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20150121 Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20160117 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160117 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160117 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20180131 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20190123 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50008042 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190801 |