EP2052136B1 - Device for seperating liquids from gases - Google Patents
Device for seperating liquids from gases Download PDFInfo
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- EP2052136B1 EP2052136B1 EP07788217A EP07788217A EP2052136B1 EP 2052136 B1 EP2052136 B1 EP 2052136B1 EP 07788217 A EP07788217 A EP 07788217A EP 07788217 A EP07788217 A EP 07788217A EP 2052136 B1 EP2052136 B1 EP 2052136B1
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- European Patent Office
- Prior art keywords
- flow tubes
- flow
- gas
- tubes
- individual
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0422—Separating oil and gas with a centrifuge device
- F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone
Definitions
- cyclone separators of various types, for example, are known as single or multi-cyclones.
- the accumulated in the crankcase, loaded with oil droplets gas is introduced tangentially into the cyclone. Due to the centrifugal forces acting in the cyclone, the oil contained in the gas stream is deposited on the inner wall of the cyclone and fed via a arranged in the lower part of the cyclone outlet the crankcase or oil sump of the engine.
- the gas flow is deflected in the cyclone, flows through a arranged at the top of the cyclone dip tube as clean gas and enters the intake tract of the engine.
- a single cyclone separator has only a limited working range, which leads to insufficient separation in the case of excessively low volume flows and to high pressure loss in the case of excessively high volume flows.
- the working area of multicyclones connected in parallel can also be extended by connecting and shutting off individual cyclones by means of a valve.
- Such multicyclones are designed, for example, as an independent assembly and require a relatively large amount of space, since a spatial separation of the components raw gas, separated oil and clean gas is required.
- oil separators are integrated in the cylinder head cover of the internal combustion engine, such as in the DE 10 2004 019 154 A1 disclosed.
- Rotary tube separators which are predominantly flowed axially, are also known.
- the rotational movement is generated by vanes, which are arranged at the gas inlet.
- a plurality of base support can be arranged with a plurality of separation elements, wherein the direction of rotation in a flow path can run the same or in opposite directions.
- the separation device can be arranged in a cavity of the cylinder head cover behind a labyrinth-like coarse separator.
- the invention has for its object to provide a device for the separation of liquids from gases, in particular for the separation of oil particles from blow-by gases of the crankcase ventilation of internal combustion engines, which is characterized by a simple, inexpensive and space-saving design and with the a good separation efficiency can be achieved.
- the flow tubes arranged in the plate-shaped basic carrier have at least one tangentially arranged gas inlet opening at their end pointing in the gas inlet direction. At the adjacent to this end face the flow tubes are closed. Since each flow tube forms a separating element or a tube separator, there is a parallel connection. Since the gas stream dividing onto the individual flow tubes is introduced into the latter only tangentially, a flow pattern is produced which leads to an improvement in the separation efficiency in comparison with the known, axially flowed tube separators.
- the tangential flow creates a combined rotational and axial flow with a swirl component in the flow tubes, with the rotational flow in the flow tubes rotating several times through 360 °.
- the number of rotations is depending on the dimension of the gas inlet opening, the velocity of the gas flow and the length of the flow tubes or tubes, wherein several revolutions of the gas flow (5 to 10 times) can be achieved.
- a flow is formed which corresponds in cross-section to the inlet cross-section and continues helically along the tube wall until it leaves the tube.
- the kinetic energy generated by the flow velocity of the gas and the tangential introduction can be utilized to a greater extent for the separation of the particles dispersed in the gas stream.
- the flow path is not affected by any additional forced flow, such as when using helical segments.
- the gas flow reaches higher rotational frequencies and larger centrifugal forces arise. This leads to a significantly improved separation efficiency.
- the deposited on the inner wall of the flow tubes liquid particles are entrained in the flow direction and drop due to gravity at the gas outlet opening of the flow tubes, collect at the bottom of the installation space and are discharged from this via a discharge opening.
- the device can be designed as a very small effective unit that requires only a small installation space.
- different combination options that allow adaptation to different operating conditions.
- the tangential gas inlet openings of the passage tubes may be slit-shaped or slit-shaped.
- the individual flow tubes may also have a plurality of gas inlet openings, which are preferably arranged radially offset from one another.
- the gas inlet openings may also have different sized cross-sectional areas.
- the flow tubes should be flush with each other at the gas inlet side.
- the frontal openings on the gas inlet side can be closed by means of a cover plate.
- the individual flow tubes can already be made in the production so that they have no frontal opening on the gas inlet side.
- valves can be in themselves known simple and inexpensive spring valves are used.
- the spring valves each have a sealing surface, which close at least one or more flow tubes on the gas outlet side. The spring valves close the gas outlet side under the action of a bias.
- the bias voltage can be used to set the differential pressure at which the valve opens.
- the use of several spring valves with different bias voltages also allows a staggered connection of further tube separators, whereby the control of the separator can be adapted even more precisely to the respective operating conditions.
- the plate-shaped base support can be equipped with flow tubes, except for a peripheral edge section.
- the acting in the basic principle as a parallel circuit separator can also be extended as a combined series circuit by a plurality of plate-shaped base support with flow tubes spaced from each other are arranged.
- the distance between the individual base supports must be at least so large that the drops emerging from the flow tubes can fall in the direction of gravity and are not entrained by the gas flow into the gas inlet openings of the flow tubes of the following base support.
- the distance between the base supports is 10 to 20 mm.
- a base support which is to be used for the deposition of larger particles or drops (coarse separator) is advantageously equipped with flow tubes, which have an enlarged tangential inlet cross-section and a larger inner diameter.
- Coarse separators have a higher absorption capacity for larger particles, but do not divorce the smaller particles due to the lower centrifugal forces. These are then deposited in the downstream basic carrier for fine separation, whose flow tubes have smaller diameters and smaller inlet cross-sections. Pre-separation can prevent overcharging of the fine separator.
- each base support or separator is assigned a separate liquid flow.
- the flow tubes can be designed inclined in the direction of the liquid collecting point. As a result, a better drainage of the separated liquid particles is achieved.
- the plate-shaped base support in the installation space can also be arranged in an inclined position. As a result, the flow tubes assume an obliquely downward position, so that the liquid deposited in the flow tubes can drain well in the direction of the liquid collection point.
- a single or a plurality of plate-shaped base support are arranged in a housing or installation space.
- the housing or the installation space have a raw gas inlet, a clean gas outlet and a liquid outlet and thus forms a separation unit.
- a space provided in the cylinder head cover space is used as an installation space in a separation of oil from blow-by gases of internal combustion engines.
- Cylinder head covers are preferably as Plastic injection molded part executed.
- the proposed separation device is particularly well suited for this purpose, both as a fine separator or as a combined coarse and fine separator due to their space-saving design and their low weight.
- the plate-shaped base support with the flow tubes are also made of plastic and can injection molding in a molding process in combination with a component of the cylinder head cover are designed as a one-piece, integral component.
- connection for supplying the blow-by gas, the clean gas outlet and the oil outlet are in this case also an integral part of the cylinder head cover.
- a plurality of separation units can also form a functional unit, wherein the individual separation units are connected in parallel.
- Under a separation unit is a housing or installation space with gas inlet, at least one base support with flow tubes, clean gas outlet and liquid outlet to understand.
- the respective gas inlets of the individual separation units can be connected separately via corresponding valves, which are integrated into the distribution lines for the supplied gas volume flow.
- FIG. 2 is shown as a section of a group with six flow tubes 2.
- the individual flow tubes 2 have a tangential raw gas inlet opening 3 and a gas outlet opening 4, via which clean gas and separated liquid emerge.
- the gas outlet openings 4 are nearly in one plane with the base support 1.
- the individual flow tubes 2 of equal length are closed at their end pointing in the gas inlet direction, on the front side 2a, by means of a cover plate 5, which is placed in the example shown.
- the cover plate 5 can also be injection-molded in groups and in each case cover the flow tubes 2 of a group.
- the tangential gas inlet opening 3 for example as a gap or slot, is arranged in each case.
- a combined rotational and axial flow is generated with a swirl component, wherein the rotational flow rotates several times through 360 °.
- tangential gas inlet opening 3 it is also possible to provide a plurality of tangential gas inlet openings which are arranged radially offset from one another.
- the tangential gas inlet openings 3 of the individual flow tubes 2 are identical and have equal inlet cross-sectional areas.
- the inlet cross-sectional areas can also be formed differently large.
- the base support 1 has six groups, each with six flow tubes 2.
- the gas outlet openings 4 of the flow tubes 2 'of four adjacent groups can be closed by means of a spring valve 6.
- the spring valves 6 designed in the form of a spiral spring are fixed to the base carrier with a fastening part 1b and have a sealing surface which closes the gas outlet openings 4 of the flow tubes 2 '.
- the differential pressure at which the valve opens be set.
- the individual flow tubes which have the function of a separating element, can thus be better adapted to the respective operating conditions.
- FIG. 5 a variant embodiment is shown in which the base support 1 is integrated with the flow tubes 2 in the installation space of a cylinder head cover 7. Of the cylinder head cover, only the part can be seen that forms the immediate installation space, which is limited by the wall sections 8.
- Fig. 5 is the narrow side of the installation space to see in the Base support 1 is inserted in a horizontal mounting position and welded to the downwardly projecting ends of the wall sections 8 with them.
- the base support 1 has three rows a, b, c, each with 10 adjacent flow tubes 2, wherein in Fig. 5 only the front flow tubes 2 can be seen.
- the individual flow tubes 2 are analogous to the in Fig. 1 and 2 formed embodiment shown.
- the cover plate 5 on the gas inlet side of the flow tubes 2 is molded as an integral part of this.
- the base support 1 has on its lower side a circumferential portion 1 c, which communicates with the adjacent space for the discharge of the clean gas and for receiving the drained oil in connection FIG. 5 is indicated by a downward arrow.
- a raw gas space 9 is formed above the flow tubes 2.
- the flow direction of the raw gas is indicated by an arrow.
- the stream of gas stream flowing laterally into the cylinder head cover 7 is divided equally between the 30 vertically arranged flow tubes 2 and is introduced tangentially into the gas inlet openings 3.
- a helical, running flow is formed which rotates several times through 360 °, the oil contained in the raw gas being deposited on the inner wall of the flow tubes 2 and entrained in the vertical flow direction due to the high centrifugal forces acting on it.
- the clean gas also flows down, in the vertical direction, down as indicated by the in Fig. 5 indicated arrow indicated.
- Fig. 6 the arrangement of a base support 1 is shown in a housing 10, wherein the base support 1 is inserted in a vertical mounting position in groove-shaped receptacles 12 of the housing 10.
- the individual flow tubes 2 of the base support 1 are arranged horizontally. Due to the arrangement of the base support 1, the housing 10 is subdivided into a raw gas space 11 and a clean gas space 13.
- the housing 10 is subdivided into a raw gas space 11 and a clean gas space 13.
- the clean gas outlet 16 is located at the upper part of the housing 10.
- the flow directions for raw gas and clean gas as well as the flow direction of the separated liquid are indicated by arrows.
- the base support 1 has 3 rows a, b, c, each with 10 congruent arranged flow tubes 2.
- the bottom flowing through the opening 14 raw gas is divided in the raw gas chamber 11 evenly on the 30, horizontally arranged flow tubes 2 and is tangential through the gas inlet openings 3 initiated in this.
- the operation of the liquid separation is analogous to the embodiment described above.
- the deposited on the inner wall of the flow tubes 2 liquid is entrained in the horizontal flow direction and drips down the gas outlet 4 of the flow tubes 2 down.
- the purified gas stream flows via the clean gas outlet 16.
- the accumulating at the bottom part 10 a liquid is discharged through the outlet 15.
- housing 10 with the base support 1 forms an independent separation unit. In special applications, it may also be appropriate to arrange several of these separation units as rows or parallel.
- a base support 1 a plurality of base supports can also be arranged in a housing or installation space, which are preferably designed differently in their deposition behavior.
- FIG. 7 two spaced basic beams 1 and 1 'are shown, wherein the basic support 1' for the coarse separation and the base support 1 is intended for the fine separation.
- the flow tubes 2 of the coarse separator 1 ' have a larger inner diameter than the flow tubes 2 of the downstream fine separator 1.
- a further liquid outlet 17 is provided between the two base supports.
- the structure of the housing 8 is otherwise analogous to that in Fig.
- Such an arrangement represents a combination of a parallel and series connection, wherein the flow tubes of a base carrier are connected in parallel and a plurality of base carriers are connected in series.
- This very simple and space-saving construction of such a separation unit can be used in particular for combined coarse and fine separation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Cyclones (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Glass Compositions (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Abscheidung von Flüssigkeiten aus Gasen, insbesondere zur Abtrennung von Ölpartikeln aus Blow-By-Gasen der Kurbelgehäuseentlüftung von Verbrennungsmotoren.The invention relates to a device for the separation of liquids from gases, in particular for the separation of oil particles from blow-by gases of the crankcase ventilation of internal combustion engines.
Zur Entölung von Kurbelgehäuseentlüftungsgasen sind z.B. Zyklonabscheider unterschiedlicher Bauarten, als Einzel- oder Multizyklone bekannt. Das sich im Kurbelgehäuse ansammelnde, mit Öltropfen beladene Gas wird tangential in den Zyklon eingeleitet. Aufgrund der im Zyklon wirkenden Zentrifugalkräfte wird das im Gasstrom enthaltene Öl an der Innenwandung des Zyklons abgeschieden und über einen im unteren Teil des Zyklons angeordneten Auslass dem Kurbelgehäuse bzw. Ölsumpf des Verbrennungsmotors zugeführt. Der Gasstrom wird im Zyklon umgelenkt, strömt über ein am Kopf des Zyklons angeordnetes Tauchrohr als Reingas ab und gelangt in den Ansaugtrakt des Motors. Ein einzelner Zyklonabscheider besitzt nur einen eingeschränkten Arbeitsbereich, der bei zu geringen Volumenströmen zu einer unzureichenden Abscheidung und bei zu hohen Volumenströmen zu einem hohen Druckverlust führt. Zur Beseitigung dieser Nachteile wurde der Einsatz parallelgeschalteter Multizyklone vorgeschlagen (
Vorteilhafterweise werden Ölabscheider in der Zylinderkopfhaube des Verbrennungsmotors integriert, wie z.B. in der
Die Integration von Zyklonabscheidern in eine Zylinderkopfhaube erhöht zwangsläufig deren Komplexität und erfordert einen relativ großen Einbauraum.The integration of cyclone separators in a cylinder head cover inevitably increases their complexity and requires a relatively large installation space.
Bekannt sind auch Rotationsröhrenabscheider, die vorwiegend axial angeströmt werden. Die Rotationsbewegung wird durch Leitschaufeln, die am Gaseintritt angeordnet sind, erzeugt.Rotary tube separators, which are predominantly flowed axially, are also known. The rotational movement is generated by vanes, which are arranged at the gas inlet.
Aus der
Das axial in die Durchflussrohre eintretende Blow-by-Gas wird durch die schneckenförmigen Segmente in eine rotierende Bewegung versetzt, wobei das Öl aus dem Gas herausgeschleudert, an der Innenwand der Durchflussrohre abgeschieden, mittels des Gasstroms zum Austritt der Durchlassrohre transportiert wird und in einen Siphon abläuft. Aufgrund der in den Röhrenabscheidern bzw. Durchflussrohren angeordneten schneckenförmigen Segmente wird eine Rotationsströmung erzeugt, bei der die abzutrennenden Partikel während des Durchströmens eines Segmentes nur einer Drehung von 180° ausgesetzt werden. Bei zwei hintereinander angeordneten Segmenten erfolgt ab dem zweiten Segment ein Strömungsverlauf in umgekehrter Drehrichtung. Den Schneckensegmenten folgend, wird der rotierende Gasstrom in axialer Richtung bewegt.The blow-by gas entering axially into the flow tubes is set in rotating motion by the helical segments, whereby the oil is expelled from the gas, deposited on the inner wall of the flow tubes, transported to the outlet of the flow tubes by the gas flow and into a siphon expires. Due to the arranged in the tube separators or flow tubes helical segments, a rotational flow is generated in the the particles to be separated are exposed during the passage of a segment only a rotation of 180 °. With two segments arranged one behind the other, a flow pattern in the opposite direction of rotation takes place from the second segment. Following the screw segments, the rotating gas flow is moved in the axial direction.
Bei einer axialen Anströmung der Durchflussrohre fällt die Steigung des Rotationswirbels größer aus, was zu einer geringeren Drehfrequenz, geringeren Zentrifugalkräften, einer kleineren Anzahl von Umläufen und damit zu geringeren Abscheidegraden führt. Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Abscheidung von Flüssigkeiten aus Gasen, insbesondere zur Abtrennung von Ölpartikeln aus Blow-By-Gasen der Kurbelgehäuseentlüftung von Verbrennungsmotoren, zu schaffen, die sich durch eine einfache, kostengünstige und Platz sparende Bauweise auszeichnet und mit der eine gute Abscheideleistung erzielt werden kann.With an axial flow of the flow tubes, the slope of the rotation vortex falls larger, resulting in a lower rotational frequency, lower centrifugal forces, a smaller number of revolutions and thus lower Abscheidegraden. The invention has for its object to provide a device for the separation of liquids from gases, in particular for the separation of oil particles from blow-by gases of the crankcase ventilation of internal combustion engines, which is characterized by a simple, inexpensive and space-saving design and with the a good separation efficiency can be achieved.
Erfindungsgemäß wird die Aufgabe durch die im Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen sind Gegenstand der Ansprüche 2 bis 14.According to the invention the object is achieved by the features specified in
Die in dem plattenförmigen Grundträger angeordneten Durchflussrohre besitzen an ihrem in Gaseinlassrichtung zeigenden Ende mindestens eine tangential angeordnete Gaseinlassöffnung. An der zu dieser angrenzenden Stirnseite sind die Durchflussrohre verschlossen. Da jedes Durchflussrohr ein Abscheideelement bzw. einen Röhrenabscheider bildet, liegt eine Parallelschaltung vor. Da der sich auf die einzelnen Durchflussrohre aufteilende Gasstrom ausschließlich tangential in diese eingeleitet wird, entsteht ein Strömungsverlauf, der im Vergleich zu den bekannten, axial angeströmten Röhrenabscheidern zu einer Verbesserung der Abscheideleistung führt. Durch die tangentiale Anströmung wird in den Durchflussrohren eine kombinierte Rotations- und Axialströmung mit einer Drallkomponente erzeugt, wobei die Rotationsströmung in den Durchflussrohren mehrmals um 360° rotiert. Die Anzahl der Rotationen ist abhängig von der Dimensionierung der Gaseinlassöffnung, der Geschwindigkeit der Gasströmung und der Länge der Durchflussrohre bzw. Röhren, wobei mehrere Umdrehungen der Gasströmung (5 bis 10 Mal) erreicht werden können. Beim Eintritt des Gases in den tangentialen Einlass bildet sich eine Strömung aus, die im Querschnitt dem Eintrittsquerschnitt entspricht und sich helixförmig entlang der Röhrenwand bis zum Röhrenaustritt fortsetzt. Die durch die Strömungsgeschwindigkeit des Gases und die tangentiale Einleitung erzeugte kinetische Energie kann zu einem größeren Anteil zur Abscheidung der im Gasstrom dispergierten Partikel genutzt werden. Der Strömungsweg wird durch keine zusätzliche Zwangsströmung, wie beim Einsatz von schneckenförmigen Segmenten, beeinflusst.The flow tubes arranged in the plate-shaped basic carrier have at least one tangentially arranged gas inlet opening at their end pointing in the gas inlet direction. At the adjacent to this end face the flow tubes are closed. Since each flow tube forms a separating element or a tube separator, there is a parallel connection. Since the gas stream dividing onto the individual flow tubes is introduced into the latter only tangentially, a flow pattern is produced which leads to an improvement in the separation efficiency in comparison with the known, axially flowed tube separators. The tangential flow creates a combined rotational and axial flow with a swirl component in the flow tubes, with the rotational flow in the flow tubes rotating several times through 360 °. The number of rotations is depending on the dimension of the gas inlet opening, the velocity of the gas flow and the length of the flow tubes or tubes, wherein several revolutions of the gas flow (5 to 10 times) can be achieved. Upon entry of the gas into the tangential inlet, a flow is formed which corresponds in cross-section to the inlet cross-section and continues helically along the tube wall until it leaves the tube. The kinetic energy generated by the flow velocity of the gas and the tangential introduction can be utilized to a greater extent for the separation of the particles dispersed in the gas stream. The flow path is not affected by any additional forced flow, such as when using helical segments.
Die Gasströmung erreicht höhere Drehfrequenzen und es entstehen größere Zentrifugalkräfte. Dies führt zu einer deutlich verbesserten Abscheideleistung. Die an der Innenwand der Durchflussrohre abgeschiedenen Flüssigkeitspartikel werden in Strömungsrichtung mitgerissen und tropfen aufgrund der Schwerkraft an der Gasaustrittsöffnung der Durchflussrohre ab, sammeln sich am Boden des Einbauraumes und werden von diesem über eine Ablassöffnung abgeführt.The gas flow reaches higher rotational frequencies and larger centrifugal forces arise. This leads to a significantly improved separation efficiency. The deposited on the inner wall of the flow tubes liquid particles are entrained in the flow direction and drop due to gravity at the gas outlet opening of the flow tubes, collect at the bottom of the installation space and are discharged from this via a discharge opening.
Ein weiterer Vorteil ist der sehr einfache Aufbau der Vorrichtung. Außerdem kann die Vorrichtung als sehr kleine wirkungsvolle Baueinheit ausgeführt werden, die nur einen geringen Einbauraum erfordert. Zusätzlich ergeben sich ohne größere bauliche Veränderungen verschiedene Kombinationsmöglichkeiten, die eine Anpassung an unterschiedliche Betriebsbedingungen ermöglichen.Another advantage is the very simple construction of the device. In addition, the device can be designed as a very small effective unit that requires only a small installation space. In addition, without major structural changes different combination options that allow adaptation to different operating conditions.
Die tangentialen Gaseinlassöffnungen der Durchlassrohre können schlitz- oder spaltförmig ausgebildet sein. Die einzelnen Durchflussrohre können auch mehrere Gaseinlassöffnungen aufweisen, die vorzugsweise radial versetzt zueinander angeordnet sind. Die Gaseinlassöffnungen können auch unterschiedlich große Querschnittsflächen besitzen. Durch vorgenannte Maßnahmen kann die Strömungsgeschwindigkeit innerhalb der Durchflussrohre beeinflusst werden.The tangential gas inlet openings of the passage tubes may be slit-shaped or slit-shaped. The individual flow tubes may also have a plurality of gas inlet openings, which are preferably arranged radially offset from one another. The gas inlet openings may also have different sized cross-sectional areas. By the aforementioned Measures can affect the flow rate within the flow tubes.
Die einzelnen Durchflussrohre besitzen vorzugsweise einen Innendurchmesser von 2 bis 20 mm und eine Länge, die mindestens das 2-fache des Innendurchmessers der Durchflussrohre beträgt. In Abhängigkeit des zur Verfügung stehenden Bauraums und der Dimensionierung der Durchflussrohre können in einem Grundträger mehr als 100 Durchflussrohre, vorzugsweise 30 bis 50, angeordnet sein. Die Durchflussrohre können den plattenförmigen Grundträger in einer Richtung überragen, also bündig mit dem Rahmen des Grundträgers abschließen, oder den Grundträger nach beiden Seiten überragen. Der Grundträger kann auch als Wandabschnitt eines Gehäuses oder Einbauraumes ausgeführt werden. Die äußere Form des Grundträgers kann verschiedenartig sein, z.B. rechteckförmig, kreisrund oder oval, und an die jeweiligen Einbauverhältnisse angepasst werden.The individual flow tubes preferably have an inner diameter of 2 to 20 mm and a length which is at least 2 times the inner diameter of the flow tubes. Depending on the available installation space and the dimensioning of the flow tubes more than 100 flow tubes, preferably 30 to 50, can be arranged in a base support. The flow tubes can project beyond the plate-shaped base support in one direction, thus terminate flush with the frame of the base support, or project beyond the base support on both sides. The base support can also be designed as a wall section of a housing or installation space. The outer shape of the base support may be various, e.g. rectangular, circular or oval, and adapted to the respective installation conditions.
Vorzugsweise sollten die Durchflussrohre an der Gaseinlassseite bündig zueinander abschließen. In diesem Fall lassen sich die stirnseitigen Öffnungen an der Gaseinlassseite mittels einer Abdeckplatte verschließen. Ansonsten können die einzelnen Durchflussrohre bereits bei der Herstellung so ausgeführt werden, dass diese keine stirnseitige Öffnung an der Gaseinlassseite aufweisen.Preferably, the flow tubes should be flush with each other at the gas inlet side. In this case, the frontal openings on the gas inlet side can be closed by means of a cover plate. Otherwise, the individual flow tubes can already be made in the production so that they have no frontal opening on the gas inlet side.
Einzelne oder auch alle Durchflussrohre können an ihrer Gasauslassseite mit einem Ventil ausgerüstet sein, das sich druckabhängig öffnet. In Abhängigkeit vom anliegenden Differenzdruck bzw. Volumenstrom werden einzelne Röhrenabscheider selbsttätig zu- oder wieder abgeschaltet. Dadurch lässt sich der Arbeitsbereich der Abscheidevorrichtung aufgrund der geringeren Abhängigkeit des Abscheidegrads vom Volumenstrom erweitern. Die Erweiterung des optimalen Arbeitsbereichs kann man insbesondere zur Entölung von Kurbelgehäuseentlüftungsgasen vorteilhaft nutzen, da der Gasvolumenstrom je nach Betriebszustand der Verbrennungskraftmaschine über mehr als eine Zehnerpotenz schwanken kann. Als Ventile können an sich bekannte einfache und kostengünstige Federventile eingesetzt werden. Die Federventile besitzen jeweils eine Dichtfläche, welche mindestens einen oder auch mehrere Durchflussrohre auf der Gasaustrittsseite verschließen. Die Federventile verschließen die Gasaustrittsseite unter Wirkung einer Vorspannung. Über die Vorspannung kann der Differenzdruck, bei dem das Ventil öffnet, festgelegt werden. Der Einsatz mehrerer Federventile mit unterschiedlichen Vorspannungen ermöglicht zudem eine gestaffelte Zuschaltung von weiteren Röhrenabscheidern, wodurch die Regelung des Abscheiders noch genauer auf die jeweils vorliegenden Betriebszustände angepasst werden kann.Individual or even all flow tubes can be equipped on their gas outlet side with a valve that opens depending on the pressure. Depending on the applied differential pressure or volume flow, individual tube separators are automatically switched on or off again. As a result, the working range of the separation device can be extended due to the lower dependence of the separation efficiency of the volume flow. The expansion of the optimum working range can be used advantageously in particular for deoiling crankcase ventilation gases, since the gas volume flow can fluctuate over more than one power of ten, depending on the operating state of the internal combustion engine. As valves can be in themselves known simple and inexpensive spring valves are used. The spring valves each have a sealing surface, which close at least one or more flow tubes on the gas outlet side. The spring valves close the gas outlet side under the action of a bias. The bias voltage can be used to set the differential pressure at which the valve opens. The use of several spring valves with different bias voltages also allows a staggered connection of further tube separators, whereby the control of the separator can be adapted even more precisely to the respective operating conditions.
Der plattenförmige Grundträger kann, bis auf einen umlaufenden Randabschnitt, mit Durchflussrohren ausgerüstet sein.The plate-shaped base support can be equipped with flow tubes, except for a peripheral edge section.
Bei der Anordnung mehrerer Durchflussrohre auf einem Grundträger ist darauf zu achten, dass die tangentialen Eintrittsöffnungen nicht durch angrenzende Durchflussrohre verdeckt werden. Gruppierungen von aneinander angrenzenden Durchflussrohren gleicher Länge und bündig abschließenden Stirnseiten können unter anderem ringförmig, sternförmig oder in Zweierreihen mit nach außen gerichteten Eintrittsöffnungen angeordnet sein. Bei drei oder mehraneinandergrenzenden Reihen kann die Verdeckung der Eintrittsöffnungen durch axial zueinander verschobene Reihen oder Durchflussrohre mit unterschiedlicher Länge vermieden werden.When arranging several flow tubes on a base support, make sure that the tangential inlet openings are not covered by adjacent flow tubes. Groups of adjacent flow tubes of equal length and flush end faces may be arranged, inter alia, annular, star-shaped or in rows of two with outwardly directed inlet openings. With three or more contiguous rows, the concealment of the inlet openings can be avoided by axially displaced rows or flow tubes of different lengths.
Die im Grundprinzip als Parallelschaltung wirkende Abscheidvorrichtung kann auch als kombinierte Reihenschaltung erweitert werden, indem mehrere plattenförmige Grundträger mit Durchflussrohren beabstandet zueinander angeordnet werden. Der Abstand zwischen den einzelnen Grundträgern muss mindestens so groß sein, dass die aus den Durchflussrohren austretenden Tropfen in Richtung der Schwerkraft absinken können und nicht von der Gasströmung in die Gaseinlassöffnungen der Durchflussrohre des nachfolgenden Grundträgers mitgerissen werden. Beispielsweise beträgt der Abstand zwischen den Grundträgern 10 bis 20 mm. Durch vorgenannte Reihenschaltung kann eine Ausführung zur gestaffelten Grob- und Feinabscheidung realisiert werden.The acting in the basic principle as a parallel circuit separator can also be extended as a combined series circuit by a plurality of plate-shaped base support with flow tubes spaced from each other are arranged. The distance between the individual base supports must be at least so large that the drops emerging from the flow tubes can fall in the direction of gravity and are not entrained by the gas flow into the gas inlet openings of the flow tubes of the following base support. For example, the distance between the base supports is 10 to 20 mm. By the aforementioned Series connection, a design for staggered coarse and fine separation can be realized.
Ein Grundträger, der zur Abscheidung größerer Partikel bzw. Tropfen eingesetzt werden soll (Grobabscheider) ist vorteilhafterweise mit Durchflussrohren ausgestattet, die einen vergrößerten tangentialen Eintrittsquerschnitt und einen größeren Innendurchmesser besitzen. Grobabscheider besitzen eine höhere Aufnahmekapazität für größere Partikel, scheiden jedoch aufgrund der geringeren Zentrifugalkräfte die kleineren Partikel nicht ab. Diese werden dann im nachgeschalteten Grundträger zur Feinabscheidung abgeschieden, dessen Durchflussrohre kleinere Durchmesser und kleinere Eintrittsquerschnitte aufweisen. Durch eine Vorabscheidung kann eine Überladung des Feinabscheiders verhindert werden. Bei einer Ausführung als Grob- und nachgeschaltetem Feinabscheider ist jedem Grundträger bzw. Abscheider ein separater Flüssigkeitsablauf zugeordnet.A base support, which is to be used for the deposition of larger particles or drops (coarse separator) is advantageously equipped with flow tubes, which have an enlarged tangential inlet cross-section and a larger inner diameter. Coarse separators have a higher absorption capacity for larger particles, but do not divorce the smaller particles due to the lower centrifugal forces. These are then deposited in the downstream basic carrier for fine separation, whose flow tubes have smaller diameters and smaller inlet cross-sections. Pre-separation can prevent overcharging of the fine separator. In a design as coarse and downstream fine separator each base support or separator is assigned a separate liquid flow.
Ist aus anwendungstechnischen Gründen eine senkrechte Anordnung bzw. Einbaulage der plattenförmigen Grundträger erforderlich, so können die Durchflussrohre in Richtung zur Flüssigkeitssammelstelle geneigt ausgeführt werden. Dadurch wird ein besseres Abfließen der abgeschiedenen Flüssigkeitspartikel erreicht. Als Alternative können die plattenförmigen Grundträger im Einbauraum auch in geneigter Lage angeordnet werden. Dadurch nehmen die Durchflussrohre eine schräg nach unten gerichtete Lage ein, sodass die in den Durchflussrohren abgeschiedene Flüssigkeit gut in Richtung zur Flüssigkeitssammelstelle ablaufen kann.If, for reasons of application technology, a vertical arrangement or mounting position of the plate-shaped base support is required, then the flow tubes can be designed inclined in the direction of the liquid collecting point. As a result, a better drainage of the separated liquid particles is achieved. As an alternative, the plate-shaped base support in the installation space can also be arranged in an inclined position. As a result, the flow tubes assume an obliquely downward position, so that the liquid deposited in the flow tubes can drain well in the direction of the liquid collection point.
Ein einzelner oder mehrere plattenförmige Grundträger werden in einem Gehäuse oder Einbauraum angeordnet. Das Gehäuse oder der Einbauraum besitzen einen Rohgaseinlass, einen Reingasauslass und einen Flüssigkeitsauslass und bildet somit eine Abscheideeinheit. In an sich bekannter Weise wird bei einer Abscheidung von Öl aus Blow-by-Gasen von Verbrennungsmotoren ein in der Zylinderkopfhaube vorgesehener Raum als Einbauraum genutzt. Zylinderkopfhauben werden vorzugsweise als Kunststoffspritzgussteil ausgeführt. Die vorgeschlagene Abscheidevorrichtung ist aufgrund ihrer Platz sparenden Bauweise und ihres geringen Gewichtes hierfür besonders gut geeignet, sowohl als Feinabscheider oder auch als kombinierter Grob- und Feinabscheider. Die plattenförmigen Grundträger mit den Durchflussrohren werden ebenfalls aus Kunststoff hergestellt und können spritzgießtechnisch in einem Formgebungsprozess in Kombination mit einem Bauteil der Zylinderkopfhaube als einteiliges, integrales Bauteil ausgeführt werden.A single or a plurality of plate-shaped base support are arranged in a housing or installation space. The housing or the installation space have a raw gas inlet, a clean gas outlet and a liquid outlet and thus forms a separation unit. In a manner known per se, a space provided in the cylinder head cover space is used as an installation space in a separation of oil from blow-by gases of internal combustion engines. Cylinder head covers are preferably as Plastic injection molded part executed. The proposed separation device is particularly well suited for this purpose, both as a fine separator or as a combined coarse and fine separator due to their space-saving design and their low weight. The plate-shaped base support with the flow tubes are also made of plastic and can injection molding in a molding process in combination with a component of the cylinder head cover are designed as a one-piece, integral component.
Der Anschluss zur Zuführung des Blow-by-Gases, der Reingasauslass und der Ölauslass sind in diesem Fall ebenfalls integraler Bestandteil der Zylinderkopfhaube. Alternativ besteht auch die Möglichkeit, die plattenförmigen Grundträger im Gehäuse oder Einbauraum durch Einschieben in korrespondierende Nuten, Einschweißen, Einschrauben, Einkleben oder Einklipsen in ihrer Einbaulage zu fixieren.The connection for supplying the blow-by gas, the clean gas outlet and the oil outlet are in this case also an integral part of the cylinder head cover. Alternatively, it is also possible to fix the plate-shaped base support in the housing or installation space by inserting into corresponding grooves, welding, screwing, gluing or clipping in their installation position.
Gemäß einer weiteren Ausführungsvariante können auch mehrere Abscheideeinheiten eine Funktionseinheit bilden, wobei die einzelnen Abscheideeinheiten parallelgeschaltet werden. Unter einer Abscheideeinheit ist ein Gehäuse bzw. Einbauraum mit Gaseinlass, mindestens einem Grundträger mit Durchflussrohren, Reingasauslass und Flüssigkeitsauslass zu verstehen. Die jeweiligen Gaseinlässe der einzelnen Abscheideeinheiten können in Abhängigkeit vom anfallenden Gasvolumenstrom über entsprechende Ventile separat zuschaltbar sein, die in den Aufteilungsleitungen für den zugeführten Gasvolumenstrom eingebunden sind. Diese Ausführungsform ist von Vorteil, wenn relativ große Gasvolumenströme mit schwankenden Durchsätzen anfallen.According to a further embodiment variant, a plurality of separation units can also form a functional unit, wherein the individual separation units are connected in parallel. Under a separation unit is a housing or installation space with gas inlet, at least one base support with flow tubes, clean gas outlet and liquid outlet to understand. Depending on the resulting gas volume flow, the respective gas inlets of the individual separation units can be connected separately via corresponding valves, which are integrated into the distribution lines for the supplied gas volume flow. This embodiment is advantageous when relatively large gas flow rates occur with fluctuating flow rates.
Die Erfindung soll nachstehend an einigen Ausführungsbeispielen näher erläutert werden.The invention will be explained in more detail below on some embodiments.
In der zugehörigen Zeichnung zeigen:
- Fig. 1
- einen einzelnen Grundträger mit mehreren, gruppenweise angeordneten Durchflussrohren, als Draufsicht,
- Fig. 2
- einen Schnitt gemäß der Linne A-A in
Fig. 1 , - Fig. 3
- einen Grundträger, bei dem die Gasauslassöffnungen mehrerer Gruppen von Durchflussrohren mit einem Federventil verschließbar sind, als Draufsicht,
- Fig. 4
- einen Schnitt gemäß der Linie B-B in
Fig. 3 , - Fig. 5
- die Anordnung eines Grundträgers im Einbauraum einer Zylinderkopfhaube, als Längsschnitt,
- Fig. 6
- die Anordnung eines Grundträgers in einem Gehäuse als Abscheideeinheit, als Längsschnitt, und
- Fig. 7
- eine Ausführungsvariante zur Grob- und Feinabscheidung, als Längsschnitt.
- Fig. 1
- a single base support with a plurality of flow tubes arranged in groups, as a plan view,
- Fig. 2
- a section according to the Linne AA in
Fig. 1 . - Fig. 3
- a base carrier in which the gas outlet openings of several groups of flow tubes can be closed with a spring valve, as a plan view,
- Fig. 4
- a section along the line BB in
Fig. 3 . - Fig. 5
- the arrangement of a basic carrier in the installation space of a cylinder head cover, as a longitudinal section,
- Fig. 6
- the arrangement of a base support in a housing as a separation unit, as a longitudinal section, and
- Fig. 7
- a variant for coarse and fine separation, as a longitudinal section.
Der in
In
Anstelle einer tangentialen Gaseinlassöffnung 3 können auch mehrere tangentiale Gaseinlassöffnungen vorgesehen sein, die radial versetzt zueinander angeordnet sind. Im gezeigten Beispiel sind die tangentialen Gaseinlassöffnungen 3 der einzelnen Durchflussrohre 2 identisch ausgebildet und besitzen gleichgroße Eintrittsquerschnittsflächen. Die Eintrittsquerschnittsflächen können auch unterschiedlich groß ausgebildet sein.Instead of a tangential
In den
In
Durch die Anordnung des Grundträgers 1 im Einbauraum wird oberhalb der Durchflussrohre 2 ein Rohgasraum 9 gebildet. Die Strömungsrichtung des Rohgases ist mit einem Pfeil gekennzeichnet. Der seitlich in die Zylinderkopfhaube 7 einströmende Rohgasstrom teilt sich gleichmäßig auf die 30, vertikal angeordneten Durchflussrohre 2 auf und wird tangential über die Gaseinlassöffnungen 3 in diese eingeleitet. Dabei bildet sich innerhalb der Durchflussrohre 2 eine helixförmige verlaufende Strömung aus, die mehrmals um 360° rotiert, wobei aufgrund der wirkenden hohen Zentrifugalkräfte das im Rohgas enthaltene Öl an der Innenwandung der Durchflussrohre 2 abgeschieden und in vertikaler Strömungsrichtung mitgerissen wird. Das Reingas strömt ebenfalls, in vertikaler Richtung, nach unten ab, wie durch den in
In
Das in
Claims (14)
- A device for separating liquids from gases, especially for separating oil particles from blow-by gases of the crankcase ventilation of internal combustion engines, consisting of at least one plate-type base support in which several flow tubes with a gas inlet and a gas outlet are provided, wherein the liquid will deposit on the inner wall of the flow tubes, characterized in that the individual flow tubes (2, 2') have at least one tangentially arranged gas inlet (3) at their end facing towards the direction of gas inlet and are closed at the front side (2a) adjacent thereto, wherein a combined rotational and axial flow with a vortex component is generated in the flow tubes (2, 2'), wherein the rotational flow in the individual tubes repeatedly rotates by 360°.
- The device according to claim 1, characterized in that the gas inlets (3) have a slot-shaped or gap-shaped design.
- The device according to either of claims 1 or 2, characterized in that the individual flow tubes (2, 2') have several gas inlets (3) having a radially offset arrangement.
- The device according to any of claims 1 to 3, characterized in that the gas inlets (3) have different cross-sectional areas.
- The device according to any of claims 1 to 4, characterized in that the individual flow tubes (2, 2') have an inner diameter of from 2 to 20 mm.
- The device according to any of claims 1 to 5, characterized in that the length (L) of the flow tubes (2, 2') is at least twice the inner diameter (D) thereof.
- The device according to any of claims 1 to 6, characterized in that the flow tubes (2, 2') arranged in a base support (1, 1') are flush with one another at their gas inlet side, the face-sided openings (2a) being closed by means of a cover plate (5).
- The device according to any of claims 1 to 7, characterized in that some of the flow tubes (2') are equipped with a valve (6) at their gas outlet side (4) that opens in a pressure-dependent way.
- The device according to any of claims 1 to 8, characterized in that the individual flow tubes (2, 2') have different diameters and lengths.
- The device according to any of claims 1 to 9, characterized in that several plate-type base supports (1, 1') with flow tubes (2, 2') are arranged at a mutual distance in series connection.
- The device according to any of claims 1 to 10, characterized in that when the plate-type base supports (1, 1') are arranged in a vertical installation position, the flow tubes (2, 2') are arranged with an inclination towards the liquid collection site.
- The device according to any of claims 1 to 11, characterized in that a single or several plate-type base supports (1, 1') are arranged in one housing (10) or installation space (8) that has a raw gas inlet (9, 14), a pure gas outlet (16) and a liquid outlet (15) and forms an independent separator unit.
- The device according to any of claims 1 to 12, characterized in that the plate-type base supports (1, 1') in said housing (10) or installation space (8) are secured in their installation position by sliding into corresponding grooves (12), welding, screwing, bonding or clipping.
- The device according to any of claims 1 to 13, characterized in that several separator units (8, 10) connected in parallel are provided, wherein the gas inlets (9, 14) of the individual separator units (8, 10) are separately switchable into use depending on the prevailing gas flow rate.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102006038700.7A DE102006038700B4 (en) | 2006-08-18 | 2006-08-18 | Device for separating liquids from gases |
PCT/EP2007/058085 WO2008019960A1 (en) | 2006-08-18 | 2007-08-03 | Device for seperating liquids from gases |
Publications (2)
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EP2052136A1 EP2052136A1 (en) | 2009-04-29 |
EP2052136B1 true EP2052136B1 (en) | 2011-05-04 |
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Family Applications (1)
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EP07788217A Revoked EP2052136B1 (en) | 2006-08-18 | 2007-08-03 | Device for seperating liquids from gases |
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US (1) | US8267071B2 (en) |
EP (1) | EP2052136B1 (en) |
CN (1) | CN101506479B (en) |
AT (1) | ATE508261T1 (en) |
DE (2) | DE102006038700B4 (en) |
WO (1) | WO2008019960A1 (en) |
ZA (1) | ZA200810417B (en) |
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DE102007058059B4 (en) * | 2007-01-26 | 2015-06-11 | Dichtungstechnik G. Bruss Gmbh & Co. Kg | Oil separator arrangement and cylinder head cover for an internal combustion engine |
-
2006
- 2006-08-18 DE DE102006038700.7A patent/DE102006038700B4/en active Active
-
2007
- 2007-08-03 WO PCT/EP2007/058085 patent/WO2008019960A1/en active Application Filing
- 2007-08-03 EP EP07788217A patent/EP2052136B1/en not_active Revoked
- 2007-08-03 AT AT07788217T patent/ATE508261T1/en active
- 2007-08-03 US US12/374,903 patent/US8267071B2/en active Active
- 2007-08-03 CN CN2007800307107A patent/CN101506479B/en active Active
- 2007-08-03 DE DE502007007140T patent/DE502007007140D1/en active Active
-
2008
- 2008-12-09 ZA ZA200810417A patent/ZA200810417B/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015223478A1 (en) | 2015-11-26 | 2017-06-01 | Polytec Plastics Germany Gmbh & Co. Kg | oil separator |
DE102015223478B4 (en) * | 2015-11-26 | 2017-12-28 | Polytec Plastics Germany Gmbh & Co. Kg | oil separator |
DE202017101622U1 (en) | 2017-03-20 | 2017-03-27 | Polytec Plastics Germany Gmbh & Co. Kg | Oil separation |
WO2018171906A1 (en) | 2017-03-20 | 2018-09-27 | Polytec Plastics Germany Gmbh & Co. Kg | Oil-separating device |
Also Published As
Publication number | Publication date |
---|---|
ZA200810417B (en) | 2009-08-26 |
ATE508261T1 (en) | 2011-05-15 |
EP2052136A1 (en) | 2009-04-29 |
DE102006038700A1 (en) | 2008-02-21 |
DE102006038700B4 (en) | 2021-11-11 |
CN101506479B (en) | 2012-05-02 |
DE502007007140D1 (en) | 2011-06-16 |
WO2008019960A1 (en) | 2008-02-21 |
US20090241919A1 (en) | 2009-10-01 |
CN101506479A (en) | 2009-08-12 |
US8267071B2 (en) | 2012-09-18 |
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