DE102012223033A1 - Device for damping pressure fluctuations of pump, has compensation element and wall of cavity that are shaped, such that compensation element applies pressure to wall of cavity, when pressure is applied to compensating element - Google Patents
Device for damping pressure fluctuations of pump, has compensation element and wall of cavity that are shaped, such that compensation element applies pressure to wall of cavity, when pressure is applied to compensating element Download PDFInfo
- Publication number
- DE102012223033A1 DE102012223033A1 DE201210223033 DE102012223033A DE102012223033A1 DE 102012223033 A1 DE102012223033 A1 DE 102012223033A1 DE 201210223033 DE201210223033 DE 201210223033 DE 102012223033 A DE102012223033 A DE 102012223033A DE 102012223033 A1 DE102012223033 A1 DE 102012223033A1
- Authority
- DE
- Germany
- Prior art keywords
- cavity
- compensation element
- wall
- pressure
- fluid
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
- F16L55/052—Pneumatic reservoirs
- F16L55/053—Pneumatic reservoirs the gas in the reservoir being separated from the fluid in the pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1446—Means for damping of pressure fluctuations in the delivery system, e.g. by puffer volumes or throttling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
Stand der TechnikState of the art
Die Erfindung geht aus von einer Vorrichtung zur Dämpfung von Druckschwankungen bzw. einem Filter bzw. einem Fördermodul nach der Gattung der unabhängigen Ansprüche. The invention relates to a device for damping pressure fluctuations or a filter or a conveyor module according to the preamble of the independent claims.
Bei der Abgasnachbehandlung mithilfe der selektiven katalytischen Reduktion kommt ein System zur Förderung eines Fluids zum Einsatz, bei dem Druckstöße im Fluid vermieden werden sollten, um Schädigungen an Bauteilen zu vermeiden. Bei diesem System werden insbesondere bei selbstzündenden Verbrennungskraftmaschinen im Abgas enthaltene Stickoxide mittels des Fluids, insbesondere eines Reduktionsmittels, zu Stickstoff und Wasser reduziert. Als Fluid wird häufig eine Harnstoff-Wasser-Lösung eingesetzt, die beispielsweise unter dem Markennamen AdBlue® erhältlich ist. Durch thermische Zersetzung des Harnstoffs entsteht im Abgasstrang das eigentliche Reduktionsmittel, gasförmiges Ammoniak NH3. Das Fluid wird in einem Tank bevorratet und über ein Fördermodul und/oder Dosiermodul in den Abgasstrang eingespritzt. Eine solche Vorrichtung zur Dosierung eines Reduktionsmittels ist aus der
In bestimmten Betriebssituationen können auf der Druckseite der Pumpe Druckschwankungen von ungefähr +/– 2 bar bei einem Betriebsdruck von ca. 9 bar auftreten. Aus der
Aus der
Die
Offenbarung der ErfindungDisclosure of the invention
Die erfindungsgemäße Vorrichtung zur Dämpfung von Druckschwankungen bzw. das erfindungsgemäße Filter bzw. das erfindungsgemäße Fördermodul mit den kennzeichnenden Merkmalen der unabhängigen Ansprüche haben demgegenüber den Vorteil einer verbesserten Dämpfung von Druckschwankungen, insbesondere den Pulsationen, die durch die periodischen Förderhübe einer Förderpumpe entstehen. Dabei wird in vorteilhafter Weise dynamisch ein Gas-, insbesondere ein Luftvolumen eingeschlossen, das, solange eine Druckbeaufschlagung des Kompensationselements erfolgt, bestehen bleiben und die Pulsationsdämpfung gewährleisten kann.The inventive device for damping pressure fluctuations or the filter according to the invention or the delivery module according to the invention with the characterizing features of the independent claims have the advantage of improved damping of pressure fluctuations, in particular the pulsations caused by the periodic delivery strokes of a feed pump. In this case, a dynamic gas, in particular an air volume is included in an advantageous manner, as long as a pressurization of the compensation element, remain and can ensure the pulsation damping.
Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der in den unabhängigen Ansprüchen angegebenen Vorrichtung zur Dämpfung bzw. des Filters bzw. des Fördermoduls möglich. The measures listed in the dependent claims advantageous refinements and improvements of the device specified in the independent claims for damping or the filter or the conveyor module are possible.
Besonders vorteilhaft ist es, einen ohnehin verwendeten bzw. notwendigen Eisdruckkompensator derart zu gestalten, daß er zur Dämpfung der Pulsationen der Pumpe Verwendung finden kann.To make an already used or necessary Eisdruckkompensator so that it can be used for damping the pulsations of the pump is particularly advantageous.
Hierbei kann in einer weiteren vorteilhaften Ausführungsform ein ohnehin vorhandenes Wandelement bzw. ein ohnehin vorhandener Deckel mit diesem Eisdruckkompensator zur gezielten Bildung eines Luftpolsters bei Druckbeaufschlagung herangezogen werden.In this case, in another advantageous embodiment, an already existing wall element or an already existing cover can be used with this ice pressure compensator for the targeted formation of an air cushion when pressure is applied.
Besonders vorteilhaft ist hierbei die Integration der Dämpfungsfunktion in einem Filter bzw. die Integration eines Filterelements in die Vorrichtung zur Dämpfung von Druckschwankungen, so daß die Wand bzw. der Deckel von der Wand bzw. dem Deckel des ohnehin vorhandenen Filters gebildet werden können.Particularly advantageous here is the integration of the damping function in a filter or the integration of a filter element in the device for damping pressure fluctuations, so that the wall or the lid of the wall or the lid of the already existing filter can be formed.
Dabei kann in einer weiteren vorteilhaften Ausführungsform das Kompensationselement beziehungsweise der Eisdruckkompensator gleichzeitig die Funktion der Dichtung zwischen Gehäuse und Deckel beziehungsweise Filterdeckel übernehmen. In this case, in a further advantageous embodiment, the compensation element or the Eisdruckkompensator simultaneously take over the function of the seal between the housing and cover or filter cover.
Weitere Vorteile ergeben sich durch die in den weiteren abhängigen Ansprüchen und in der Beschreibung genannten Merkmale.Further advantages result from the features mentioned in the further dependent claims and in the description.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it
Ausführungsformen der ErfindungEmbodiments of the invention
Die in
Im in der
Es bildet sich also im Filterbetrieb eine den Raum
Durch die Anpassung von Eisdruckkompensationselement
In alternativen Ausführungsformen können das Kompensationselement und der Deckel so ausgeformt werden, daß ein anderer abdichtender Kontaktbereich vorgesehen wird. Insbesondere kann die Ausformung auch so erfolgen, daß mehrere, nicht zusammenhängende Kontaktbereiche gebildet werden, so daß bei Fluiddruckbeaufschlagung mehrere, voneinander isolierte Luftpolster gebildet werden.In alternative embodiments, the compensation element and the lid may be formed to provide another sealing contact area. In particular, the shaping can also take place in such a way that a plurality of non-contiguous contact regions are formed, so that a plurality of mutually insulated air cushions are formed when fluid pressure is applied.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 19946900 [0002, 0002] DE 19946900 [0002, 0002]
- DE 102011003327 [0003] DE 102011003327 [0003]
- US 4712584 A [0004] US 4712584 A [0004]
- DE 10342936 [0005] DE 10342936 [0005]
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210223033 DE102012223033A1 (en) | 2012-12-13 | 2012-12-13 | Device for damping pressure fluctuations of pump, has compensation element and wall of cavity that are shaped, such that compensation element applies pressure to wall of cavity, when pressure is applied to compensating element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210223033 DE102012223033A1 (en) | 2012-12-13 | 2012-12-13 | Device for damping pressure fluctuations of pump, has compensation element and wall of cavity that are shaped, such that compensation element applies pressure to wall of cavity, when pressure is applied to compensating element |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102012223033A1 true DE102012223033A1 (en) | 2014-06-18 |
Family
ID=50821321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201210223033 Withdrawn DE102012223033A1 (en) | 2012-12-13 | 2012-12-13 | Device for damping pressure fluctuations of pump, has compensation element and wall of cavity that are shaped, such that compensation element applies pressure to wall of cavity, when pressure is applied to compensating element |
Country Status (1)
Country | Link |
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DE (1) | DE102012223033A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015211111A1 (en) | 2015-06-17 | 2016-12-22 | Robert Bosch Gmbh | Container for a liquid medium |
US20170122167A1 (en) * | 2015-10-30 | 2017-05-04 | Eberspächer Exhaust Technology GmbH & Co. KG | Device for release of reactant into the exhaust gas stream of an internal combustion engine |
DE102016005659A1 (en) * | 2016-05-11 | 2017-11-16 | Mann + Hummel Gmbh | Filter element for liquid filtration |
DE102017008774A1 (en) * | 2017-09-19 | 2019-03-21 | Woodward L'orange Gmbh | pump |
DE102017011279A1 (en) * | 2017-12-07 | 2019-06-13 | Mann+Hummel Gmbh | Round filter element of a filter for urea-water solution and filter |
DE102017011278A1 (en) * | 2017-12-07 | 2019-06-13 | Mann+Hummel Gmbh | Volume compensation device of a filter for urea-water solution and filter |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4712584A (en) | 1986-12-08 | 1987-12-15 | Lear Siegler, Inc. | Surge suppressor |
DE19946900A1 (en) | 1999-06-22 | 2000-12-28 | Bosch Gmbh Robert | Complex system dosing and mixing urea and air, used for nitrogen oxide conversion in vehicle exhaust purification systems, is integrated into or onto single plastic or metal block |
DE10342936A1 (en) | 2003-09-17 | 2005-04-21 | Bosch Gmbh Robert | Device for damping pressure pulsation and a hydraulic unit equipped with this device |
DE102011003327A1 (en) | 2011-01-28 | 2012-08-02 | Robert Bosch Gmbh | Method for detecting loading condition of filter, particularly fine filter in selective catalytic reduction dosing system, involves arranging filter between feed pump and dosing unit |
-
2012
- 2012-12-13 DE DE201210223033 patent/DE102012223033A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4712584A (en) | 1986-12-08 | 1987-12-15 | Lear Siegler, Inc. | Surge suppressor |
DE19946900A1 (en) | 1999-06-22 | 2000-12-28 | Bosch Gmbh Robert | Complex system dosing and mixing urea and air, used for nitrogen oxide conversion in vehicle exhaust purification systems, is integrated into or onto single plastic or metal block |
DE10342936A1 (en) | 2003-09-17 | 2005-04-21 | Bosch Gmbh Robert | Device for damping pressure pulsation and a hydraulic unit equipped with this device |
DE102011003327A1 (en) | 2011-01-28 | 2012-08-02 | Robert Bosch Gmbh | Method for detecting loading condition of filter, particularly fine filter in selective catalytic reduction dosing system, involves arranging filter between feed pump and dosing unit |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015211111A1 (en) | 2015-06-17 | 2016-12-22 | Robert Bosch Gmbh | Container for a liquid medium |
US20170122167A1 (en) * | 2015-10-30 | 2017-05-04 | Eberspächer Exhaust Technology GmbH & Co. KG | Device for release of reactant into the exhaust gas stream of an internal combustion engine |
CN106640288A (en) * | 2015-10-30 | 2017-05-10 | 埃贝斯佩歇排气技术有限责任两合公司 | Device for release of reactant into the exhaust gas stream of an internal combustion engine |
US10156172B2 (en) * | 2015-10-30 | 2018-12-18 | Eberspächer Exhaust Technology GmbH & Co. KG | Device for release of reactant into the exhaust gas stream of an internal combustion engine |
CN106640288B (en) * | 2015-10-30 | 2020-01-21 | 埃贝斯佩歇排气技术有限责任两合公司 | Device for releasing a reactant into the exhaust gas flow of an internal combustion engine |
DE102016005659A1 (en) * | 2016-05-11 | 2017-11-16 | Mann + Hummel Gmbh | Filter element for liquid filtration |
DE102017008774A1 (en) * | 2017-09-19 | 2019-03-21 | Woodward L'orange Gmbh | pump |
DE102017008774B4 (en) | 2017-09-19 | 2019-05-16 | Woodward L'orange Gmbh | pump |
DE102017011279A1 (en) * | 2017-12-07 | 2019-06-13 | Mann+Hummel Gmbh | Round filter element of a filter for urea-water solution and filter |
DE102017011278A1 (en) * | 2017-12-07 | 2019-06-13 | Mann+Hummel Gmbh | Volume compensation device of a filter for urea-water solution and filter |
US11351485B2 (en) | 2017-12-07 | 2022-06-07 | Mann+Hummel Gmbh | Round filter element of a filter for urea-water solution and filter |
DE102017011278B4 (en) | 2017-12-07 | 2023-04-13 | Mann+Hummel Gmbh | Filter for urea-water solution with a volume compensation device |
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Legal Events
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |