EP1555435A2 - Dosierpumpe - Google Patents
Dosierpumpe Download PDFInfo
- Publication number
- EP1555435A2 EP1555435A2 EP05000099A EP05000099A EP1555435A2 EP 1555435 A2 EP1555435 A2 EP 1555435A2 EP 05000099 A EP05000099 A EP 05000099A EP 05000099 A EP05000099 A EP 05000099A EP 1555435 A2 EP1555435 A2 EP 1555435A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide sleeve
- region
- carrier element
- dosing pump
- pump according
- 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
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
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
-
- 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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
Definitions
- the present invention relates to a metering pump, with which, for example liquid fuel to a heater in a vehicle can be promoted.
- Such metering pumps generally comprise a delivery piston, which is reciprocable for conveying the liquid fuel and for example, received and guided in a guide sleeve. Due to the back and forth movement of the piston dips depending on the movement cycle more or less strong in this guide sleeve. To this Way becomes from a through an inner surface of this guide sleeve also limited pump discharge chamber either the ejected liquid fuel, namely, when the delivery piston in Is moved towards minimizing the pump discharge chamber volume, or fuel can be absorbed, namely, when the Delivery piston in the direction of maximizing the Pumpenausdorfcromedians is moved.
- this guide sleeve is in a carrier element, the part a housing of the metering pump may be or in such a housing can be worn, firmly worn.
- To get the liquid fuel in To be able to conduct direction to the pump discharge chamber is between an outer surface of this guide sleeve and this in itself carrying support member has a circumferential distance, so that a annular flow space is formed. This leads towards the Pump discharge chamber.
- a metering pump in particular for supplying fuel to a vehicle heater, comprising a delivery piston, which for conveying liquid medium is reciprocable, a the delivery piston partially receiving and guide sleeve for reciprocating movement, wherein the guide sleeve having an inner surface of a pump discharge chamber limited and with an outer surface one to the pump discharge chamber leading channel arrangement limited, wherein the guide sleeve is carried in a carrier element and in a first length range with its outer surface substantially over the entire circumference rests against the carrier element and in a second length range with its outer surface at a distance from the carrier element, wherein between the carrier element and the guide sleeve in their second length range, the channel arrangement is provided, wherein the Guide sleeve in its second length range at least one Has supporting region, with which this with respect to the support element is supported.
- the metering pump according to the invention are various advantageous Aspects received. So allows the design of the guide sleeve with at least one support section in that length range, in which this also limits the channel arrangement, one over the length the guide sleeve away better distributed support or carrying action concerning the carrier element. That is, that length range, in which is essentially a full-surface circumferential contact with respect to the support element is present, in terms of its support function, which also signify the correct functionality of the metering pump is relieved, as a better distribution over the entire length range the guide sleeve can be obtained. This in turn makes it possible not to make the guide sleeve made of metal, but for example, made of plastic.
- a basically non-rotationally symmetric Shaping for example by production in an injection molding process. Due to the possibility of other materials due to the shape specification as a metal to use, in turn, the choice of materials be taken so that the operating characteristics is improved, namely with regard to the friction behavior between the reciprocating Delivery piston and the guide sleeve.
- the choice of materials be taken so that the operating characteristics is improved, namely with regard to the friction behavior between the reciprocating Delivery piston and the guide sleeve.
- Low-friction plastics are used, so that the service life a metering pump constructed according to the invention can be significantly increased.
- the metering pump according to the invention can be further constructed so that the guide sleeve substantially in its first length range the Pump discharge chamber limited and substantially in its second Length range limits the channel arrangement.
- the guide sleeve in the Dosing the guide sleeve be equipped so that the guide sleeve has an outer contour in its second longitudinal region, which corresponds to the outer contour of the guide sleeve in the first length range and at least one peripheral region through an outward towards open and the channel arrangement at least partially providing Depression is interrupted.
- the guide sleeve made of plastic material can be, with the advantage that not only less expensive material and also easier to process or lighter in the manufacturing process manageable material can be used, but that too Sliding properties in the leadership of the delivery piston significantly improved can be.
- an inventively designed metering pump is general denoted by 10.
- This metering pump 10 can be used to liquid fuel from one provided in a motor vehicle Tank towards a heater, such. B. a heater or to promote a heater.
- the metering pump 10 comprises a housing assembly 12, which consists of several Components is composed.
- a housing end part 14 provided on which a to be connected to a hose connection Inlet port 16 is provided.
- a filter 18 is provided in the housing end portion 14 .
- a GeHouseau joint 20 firmly connected to the its other axial end region - axially relative to a longitudinal axis the entire metering pump 10 - with another housing end part 22nd connected is.
- At this further housing end part 22 is in the radially inner Range - radially relative to the longitudinal axis A - a long elongated, sleeve-like support member 24 worn.
- an outlet check valve 26 carried, which is a valve seat essentially providing a part 28th and an outlet port 30 connectable to a hose line includes. On the valve sits a spring-biased valve ball 32, which prevents liquid discharged into the outlet port 30 Fuel flows back again.
- a general Supported with 34 designated electromagnetic coil On the housing end portion 14 and the support member 24 is a general Supported with 34 designated electromagnetic coil.
- the housing end part 14, a bobbin 36 of the electromagnetic coil 34 and the support member 24 define a pump inlet chamber 38, to which a In the housing end portion 14 provided inlet opening 40 leads.
- guide sleeve 42 has one with, for example Circular cross-section designed interior 44.
- This Interior 44 which is bounded by an inner surface 46, limited in cooperation with the part 28 of the valve assembly 26 a Pump discharge chamber 48 and further serves to guide a delivery piston 50 for reciprocation in the direction of the longitudinal axis A.
- an armature 52 In his not engaging in the guide sleeve 42 carries the area Delivery piston 50 an armature 52.
- a biasing spring 54th the delivery piston 50 is biased so that it tends to be so far as possible from the interior 44 of the guide sleeve 42 out too move and doing so with a worn for example on the anchor sealing element 56 complete the inlet opening 40.
- the guide sleeve 42 which according to the principles of the present invention is preferably constructed of plastic material, is long elongated shape and has essentially two lengths.
- a first length region 58 the guide sleeve 42 is shaped the peripheral contour of an outer surface 60 thereof is the peripheral contour an inner surface 62 of the support member 24 corresponds.
- this inner surface 62 with provided in a substantially circular contour, so that in the first Length range 58, the guide sleeve 42 also with circular Outer surface is formed.
- the Outer dimension of the guide sleeve 42 at least in this length range 58 a certain excess with respect to the inside dimension of the Carrier element 24, so that in particular in this first Length range 58 when inserted into the support member 24 Guide sleeve 42 is provided a press fit and thus a Stable support of the guide sleeve 42 is present.
- a second length region 64 the shape of the Outer surface of the guide sleeve 42 from the shape of the inner surface 62 of the support member 24 from.
- the guide sleeve 42 is flattened so that substantially plane, ie not curved outer surface areas 70, 72 formed are.
- These outer surface areas 70, 72 are now at a distance from Inner surface 62 of the support member 24, so that between the support member 24 and the guide sleeve 42 in this second length range 64 of the guide sleeve 42, a channel assembly 74 is provided.
- This channel assembly 74 connects to the inlet chamber 38 and leads to through holes 76, each in the outer surface areas 70, 72 in the adjoining area to the first length area 58 of Guide sleeve 42 are provided and lead into the interior 44.
- the Position of these openings 76 relative to the longitudinal extent of the guide sleeve 42 is selected such that at maximum from the guide sleeve 42 pulled out delivery piston 50 whose still in the guide sleeve 42 engaging end the openings 76 no longer or no longer completely covered.
- the delivery piston 50 covers the openings 76, so that then a connection between the pump discharge chamber 48 and the channel assembly 74 and thus the pump inlet chamber 38th is interrupted.
- a support portion 78, 80 is provided in each of the flattened Surface regions 70, 72.
- the support sections 78, 80 extend in the example shown by the inlet chamber 38 proximal end portion of the guide sleeve 42 to the area in which a respective passage opening 76 is formed.
- the projection of the support sections 78, 80 over the respective flattened surface area 70, 72 is selected so that these support sections 78, 80 radially approximately up to the level the outer surface 60 in the first longitudinal region 58 and in that peripheral region, in which then also a respective support section 78, 80 connects, rich.
- the electromagnet assembly 34 is energized, so moved the armature 52 together with the delivery piston 50 in the direction Reducing the pump discharge chamber volume.
- the delivery piston 50 covers the openings 76 in the Guide sleeve 42 completely, so no at this time in the pump discharge chamber 48 contained fuel via the openings 76 in the direction can be pushed back to the inlet chamber 48.
- the shape of the Guide sleeve 42 may be different in their second length portion 64 as shown. So a division is in a different angle ratio than 180 ° possible. It is also possible, of course, the channel arrangement 74 to provide by differently shaped groove-like Einsekungen, the are open radially outward and along the guide sleeve 42 itself extend to one or more of the openings 76. Ultimately, too to interpret the variant visible in FIGS.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
- Fig. 1
- eine Dosierpumpe im Längsschnitt, geschnitten längs einer Linie I-I in Fig. 2;
- Fig. 2
- eine Querschnittsansicht der in Fig. 1 gezeigten Dosierpumpe, geschnitten längs einer Linie II-II in Fig. 1;
- Fig. 3
- eine vergrößerte Detailansicht des Ausschnitts III in Fig. 2;
- Fig. 4
- eine perspektivische Ansicht einer bei der Dosierpumpe der Fig. 1 eingesetzten Führungshülse.
Claims (9)
- Dosierpumpe, insbesondere zum Zuführen von Brennstoff zu einem Fahrzeugheizgerät, umfassend:einen Förderkolben (50), welcher zum Fördern von flüssigem Medium hin- und herbewegbar ist,eine den Förderkolben (50) teilweise aufnehmende und zur Hinund Herbewegung führende Führungshülse (42), wobei die Führungshülse (42) mit einer Innenoberfläche (46) eine Pumpenausstoßkammer (48) begrenzt und mit einer Außenoberfläche (60) eine zu der Pumpenausstoßkammer (48) führende Kanalanordnung (74) begrenzt, wobei die Führungshülse (42) in einem Trägerelement (24) getragen ist und in einem ersten Längenbereich (58) mit ihrer Außenoberfläche (60) im Wesentlichen über den gesamten Umfang an dem Trägerelement (24) anliegt und in einem zweiten Längenbereich (64) mit ihrer Außenoberfläche einen Abstand zu dem Trägerelement (24) aufweist, wobei zwischen dem Trägerelement (24) und der Führungshülse (42) in ihrem zweiten Längenbereich (64) die Kanalanordnung (74) bereitgestellt ist,
- Dosierpumpe nach Anspruch 1,
dadurch gekennzeichnet, dass die Führungshülse (42) in ihrem zweiten Längenbereich (64) in wenigstens einem Umfangsbereich eine bezüglich des ersten Längenbereichs (58) zurückgesetzte Außenoberfläche (70, 72) aufweist. - Dosierpumpe nach Anspruch 2,
dadurch gekennzeichnet, dass in dem Bereich der zurückversetzten Außenoberfläche (70, 72) ein über diese hinausragender Abstützabschnitt (78, 80) vorgesehen ist. - Dosierpumpe nach Anspruch 3,
dadurch gekennzeichnet, dass der Abstützabschnitt (78, 80) über die zurückversetzte Außenoberfläche (70, 72) bis auf das Niveau der Außenoberfläche im ersten Längenbereich (58) hinausragt. - Dosierpumpe nach Anspruch 3 oder 4,
dadurch gekennzeichnet, dass im Angrenzungsbereich des ersten Längenbereichs (58) an den zweiten Längenbereich (64) wenigstens eine zu der Pumpenausstoßkammer (48) führende Durchtrittsöffnung (76) vorgesehen ist. - Dosierpumpe nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet, dass an zwei im Wesentlichen entgegengesetzt zueinander liegenden Umfangsbereichen im zweiten Längenbereich (64) eine zurückversetzte Außenoberfläche (70, 72) vorgesehen ist. - Dosierpumpe nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Führungshülse (42) im Wesentlichen in ihrem ersten Längenbereich (58) die Pumpenausstoßkammer (48) begrenzt und im Wesentlichen in ihrem zweiten Längenbereich (64) die Kanalanordnung (74) begrenzt. - Dosierpumpe nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass die Führungshülse (42) in ihrem zweiten Längenbereich (64) eine Außenkontur aufweist, die der Außenkontur der Führungshülse (42) im ersten Längenbereich (58) entspricht und an wenigstens einem Umfangsbereich durch eine nach außen hin offene und die Kanalanordnung (74) wenigstens zum teil bereitstellende Einsenkung unterbrochen ist. - Dosierpumpe nach Anspruch 1 oder nach dem Oberbegriff von Anspruch 1,
dadurch gekennzeichnet, dass die Führungshülse (42) aus Kunststoffmaterial aufgebaut ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004002245A DE102004002245A1 (de) | 2004-01-15 | 2004-01-15 | Dosierpumpe |
DE102004002245 | 2004-01-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1555435A2 true EP1555435A2 (de) | 2005-07-20 |
EP1555435A3 EP1555435A3 (de) | 2006-01-18 |
EP1555435B1 EP1555435B1 (de) | 2009-04-22 |
Family
ID=34609576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05000099A Expired - Fee Related EP1555435B1 (de) | 2004-01-15 | 2005-01-04 | Dosierpumpe |
Country Status (3)
Country | Link |
---|---|
US (1) | US7621726B2 (de) |
EP (1) | EP1555435B1 (de) |
DE (2) | DE102004002245A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006044254B3 (de) * | 2006-09-16 | 2008-03-27 | Thomas Magnete Gmbh | Membranpumpe |
DE102006044253B3 (de) * | 2006-09-16 | 2008-03-27 | Thomas Magnete Gmbh | Membran und Pumpenkopf für eine hydraulisch angetriebene Membranpumpe |
DE102006044252B3 (de) * | 2006-09-16 | 2008-02-28 | Thomas Magnete Gmbh | Membranpumpe zur Förderung und Dosierung eines Fluids |
DE102006044248B3 (de) * | 2006-09-16 | 2008-04-03 | Thomas Magnete Gmbh | Membranpumpe |
DE102006044255B3 (de) * | 2006-09-16 | 2008-03-27 | Thomas Magnete Gmbh | Membranpumpe zur Förderung und Dosierung eines Fluids |
DE102006044246B4 (de) * | 2006-09-16 | 2009-05-28 | Thomas Magnete Gmbh | Abgasnachbehandlungssystem |
DE102009033736A1 (de) | 2008-07-21 | 2010-01-28 | Thomas Magnete Gmbh | Förder- oder Dosierpumpe, und Verfahren zu deren Betrieb |
DE102008055609B4 (de) * | 2008-11-03 | 2011-12-29 | Thomas Magnete Gmbh | Hubkolbenpumpe |
DE102011107761A1 (de) * | 2011-07-15 | 2013-01-17 | Thomas Magnete Gmbh | Dosierpumpe |
DE102015116783A1 (de) * | 2015-10-02 | 2017-04-06 | Eberspächer Climate Control Systems GmbH & Co. KG | Dosierpumpe, insbesondere Brennstoffdosierpumpe für ein Fahrzeugheizgerät |
DE102015015845A1 (de) * | 2015-12-05 | 2017-06-08 | Thomas Magnete Gmbh | Hubkolbenpumpe und Verfahren zu ihrem Zusammenbau |
RU2654808C1 (ru) * | 2017-05-29 | 2018-05-22 | Евсей Аврумович Кордит | Дозировочный насос |
DE202018106533U1 (de) | 2018-11-19 | 2018-11-28 | Evsey A. Kordit | Dosierpumpe |
DE102019218092A1 (de) * | 2019-11-22 | 2021-05-27 | Robert Bosch Gmbh | Elektromagnetische Betätigungseinrichtung |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004040135A1 (en) | 2002-11-01 | 2004-05-13 | Danfoss A/S | A reciprocating liquid pump for delivery of liquid fuel to a domestic burner device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH672354A5 (de) * | 1987-05-19 | 1989-11-15 | Cryopump Ag | |
DE59600061D1 (de) * | 1995-03-03 | 1998-02-05 | Cryopump Ag | Pumpe zum Pumpen eines verflüssigtes Gas aufweisenden Fluids und Einrichtung mit einer Pumpe |
US5713723A (en) * | 1996-05-17 | 1998-02-03 | Tuthill Corporation | Volumetric hand pump |
CZ292533B6 (cs) * | 1999-11-18 | 2003-10-15 | Brano-Ateso A.S., Člen Brano Group | Elektromagnetické pístové čerpadlo |
DE10111004A1 (de) * | 2001-03-07 | 2002-09-26 | Webasto Thermosysteme Gmbh | Mobiles Heizgerät mit einer Brennstoffzuführeinrichtung |
-
2004
- 2004-01-15 DE DE102004002245A patent/DE102004002245A1/de not_active Withdrawn
-
2005
- 2005-01-04 EP EP05000099A patent/EP1555435B1/de not_active Expired - Fee Related
- 2005-01-04 DE DE502005007117T patent/DE502005007117D1/de active Active
- 2005-01-13 US US11/034,545 patent/US7621726B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004040135A1 (en) | 2002-11-01 | 2004-05-13 | Danfoss A/S | A reciprocating liquid pump for delivery of liquid fuel to a domestic burner device |
Also Published As
Publication number | Publication date |
---|---|
US20050158192A1 (en) | 2005-07-21 |
DE502005007117D1 (de) | 2009-06-04 |
DE102004002245A1 (de) | 2005-08-11 |
EP1555435B1 (de) | 2009-04-22 |
EP1555435A3 (de) | 2006-01-18 |
US7621726B2 (en) | 2009-11-24 |
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