EP2150706B1 - Gas-dynamic pressure wave machine - Google Patents
Gas-dynamic pressure wave machine Download PDFInfo
- Publication number
- EP2150706B1 EP2150706B1 EP08748769A EP08748769A EP2150706B1 EP 2150706 B1 EP2150706 B1 EP 2150706B1 EP 08748769 A EP08748769 A EP 08748769A EP 08748769 A EP08748769 A EP 08748769A EP 2150706 B1 EP2150706 B1 EP 2150706B1
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- European Patent Office
- Prior art keywords
- cell
- pressure wave
- machine according
- wave machine
- rotor
- 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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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F13/00—Pressure exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/32—Engines with pumps other than of reciprocating-piston type
- F02B33/42—Engines with pumps other than of reciprocating-piston type with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers
Definitions
- the invention relates to a gas-dynamic pressure wave machine for charging an internal combustion engine according to the features in the preamble of patent claim 1.
- Charging systems that generate gas-dynamic processes in closed gas channels and use them for charging are generally referred to as pressure wave superchargers or pressure wave machines.
- the cell rotors used in pressure wave machines are made of cast material.
- the cell rotors are cylindrical and usually have axially straight, cross-section constant running channels extending from the hot gas to the cold gas side. It is known to actively drive the rotor in pressure wave chargers, which are used as charge air compressors for internal combustion engines.
- the cell rotor has axially parallel or obliquely to the rotor axis or helically wound cell separation walls. The drive of the cell rotor is effected by the action of the cell walls by high-pressure exhaust gases, which open in the rotor housing via gas channels in a corresponding loading angle and set by the entry of the exhaust gas, the cell rotor in rotation.
- a pressure exchanger with a frusto-conical rotor From the DE 690 08 541 T2 is known a pressure exchanger with a frusto-conical rotor.
- the radial height of the individual rotor cells varies in the longitudinal direction of the rotor.
- a pressure exchanger for an internal combustion engine is shown, wherein the pressure exchanger should have an increased flushing energy.
- the individual cells of the cell rotor should generally have a constant cross section along their longitudinal axes, which only succeeds due to the inclination of the cells with respect to the longitudinal axis of the rotor in that the cell height decreases.
- Aerodynamic pressure wave machines also count by the DE 1 428 029 B to the prior art, in which cylindrical rotors are used.
- the individual cells may be connected to a shroud and a hub mechanically, by welding or by soldering. Also, the production of cells from box sections or a meander-like curved band is possible. From the GB 1 058 577 A It is known to provide several concentric cell rings. There are also different approaches to cell geometry. In the GB 920 624 A it is proposed that Build cell dividing walls from Z-shaped bent sheets.
- the individual cells can also be configured honeycomb, as in the GB 840 408 A is shown. If the cells are arranged in several concentric rings, it is according to the teaching of GB 920 908 possible to provide cell cross-sections that differ from ring to ring.
- the problem with today's systems is the thermal load collective, which is subject to the entire component geometry of the cell rotor. Temperatures of up to 1,100 ° C can be found on the hot gas side of the cell rotor and temperatures of up to 200 ° C on the cold gas side. A thermally induced component distortion and a resulting sub-optimal efficiency are the result. Problems occur in particular in the gap dimensional accuracy between the gas-conducting elements.
- the gas inlet angle are not optimal.
- Cast cell rotors also have a high moment of inertia, due to relatively large wall thicknesses.
- the casting technology production of fine cell structures is very expensive. Cast manufacturing also requires relatively expensive inspection procedures and high reject rates.
- the invention is based on the object, a gas-dynamic pressure wave machine for charging an internal combustion engine, in particular with regard to the design of the Cell rotor to optimize in terms of manufacturing technology and to increase the efficiency of the pressure wave machine.
- the essence of the invention can be seen in the fact that the outer circumference of the cell rotor increases from its exhaust side to its charge air side.
- This, in effect, non-cylindrical design of the cell rotor brings with it the possibility of being built, i. non-cast, cell rotors with high manufacturing accuracy cost-effectively.
- the reason is that the individual cell dividing walls between adjacent cells, while maintaining close dimensional tolerances, in particular while maintaining close joining gaps, with the jacket elements radially limiting the cells inside and outside, i. on the outside with an outer sheath and the inside with an inner sheath, can be connected.
- a previously manufactured outer sheath can be slipped over the individual cell dividing walls, so that the joint gap becomes minimal due to displacement of the outer sheath or of the inner sheath in the longitudinal extent of the cell rotor, which results in cost-effective, reliable and very precise joining the individual components, in particular by soldering or fusion welding processes enabled.
- the jacket elements of the cell rotor can therefore be made somewhat longer than the individual cell dividing walls in order to ensure by Relatiwerlagerung in the direction of the common longitudinal axis that the joint gap is as small as possible.
- the non-cylindrical outer contour of the cell rotor also allows self-centering of the jacket elements during the joining process.
- you wanted to build cylindrical cell rotors you had to work much tighter Tolerance ranges are met in order to realize circumferentially consistently small joining gaps can.
- the cell rotor is preferably formed frusto-conical. This information refers to its external geometry. The shape of the outer geometry also determines the internal geometry of the cell rotor, since the height of a cell measured in the radial direction should remain constant over the longitudinal extent of the cell rotor. Nevertheless, the cross-sectional area of the individual cells increases from the exhaust side to the charge air side because the annular area of a cell ring from the charge air side to the exhaust side also increases, but the number of cells remains constant. Increasing the cross-sectional area toward the exhaust side results in a reduction in the velocity of the combustion gas within a cell and thus in a pressure increase, which can increase the efficiency and charge level achieved by the pressure wave machine.
- the advantages of the invention are not only in frustoconical cell rotors to bear, but also when the outer jacket of the cell rotor is curved in the longitudinal extension of the cell rotor and, accordingly, all cells are curved in their longitudinal extent, in the sense that they are on the cold gas side at a greater distance to the axis of rotation of the cell rotor run as on the acted upon by exhaust gas hot gas side.
- the curvature may be constant over the length of the cell rotor.
- the curvature of the outer shell increases from the exhaust side to the charge air side.
- the lateral surface can therefore be parabolically curved in the longitudinal extent of the cell rotor or form a parabolic rotational body.
- the angle between the axis of rotation or longitudinal axis of the cell rotor and its outer jacket can be up to 50 °.
- the angle may vary depending on the curvature or slope of the outer shell.
- the angle is preferably greater than 20 °.
- the cell rotor can be assembled from semi-finished products of different materials.
- metallic materials in particular steels of different chemical composition with different mechanical properties
- the individual cells can be formed from thin sheet metal elements.
- the gas guide grid formed of the cell dividing walls can be made of bent, thin sheet metal elements and connected to the outer and inner supporting structural elements, i. an outer sheath and an inner sheath to be connected.
- the finely structured cell dividing walls are preferably made of a thin stainless steel foil with wall thicknesses that can be in a range of 0.05 - 1.0 mm.
- the jacket may be formed from a conical expansion of a cylindrical tubular component, i. by cold forming.
- the selection of materials suitable for the requirements enables a reduction of the mass and in relation to cast components a significant reduction of the mass moment of inertia.
- the obstruction and blind surfaces resulting from the individual cell dividing walls can be reduced as much as possible, with an optimum being sought between as many cells as possible and the smallest possible blind surface or obstructive surface.
- the optimal ratio of the cross-sectional areas of the cells to the cross-sectional area of the individual cell dividing walls is essentially material-dependent, since the individual cell dividing walls are subject to strong mechanical and thermal stresses.
- the design of the cell rotor according to the invention is closed on the periphery.
- the rotor can be 1 to 3 concentric cell rings, which are separated by concentric shell elements, provided.
- the jacket element separating the cell rings is at the same time the outer jacket for the inner cell ring and the inner jacket for the outer cell ring.
- a cell rotor usually has equal cell cross-sections over its entire circumference.
- the cell rotor according to the invention it is possible to build pressure wave machines tuned to the respective internal combustion engine by arranging irregularly distributed cells over the circumference of the cell rotor in the circumferential extent. In other words, the noise development can be extremely limited or even prevented by varying the distances between the individual cell dividing walls.
- the sound pressure wave from the exhaust tract of the internal combustion engine can be chopped up by the plurality of individual cells, so that the outlet side of the cell a uniform exit gas flow is formed, which has only small pressure fluctuations and thus minimal acoustic emissions.
- the particular advantage over cell rotors produced by casting technology is that, by changing the position of individual cell dividing walls, resonant vibrations can be easily or at the same time inexpensively restricted or prevented.
- an irregular sequence of cells of different widths or different circumferential extents is provided.
- two cells of different widths are uneven, that is, distributed as irregularly as possible over the circumference of the cell rotor Repetitions and thus the possibility to be stimulated to resonant vibrations to avoid.
- the irregular distribution of the cells over the circumference refers not only to a single cell ring, but to the cells of all cell rings. In this case, it may be favorable if the relative deviations in the circumferential extent between the cells of each cell ring are the same. If the cells of a cell ring extend, for example, in one above 2 ° and in the other case above 3.5 °, then this ratio also applies to the cells of other cell rings.
- the cells in cross-section are circular ring pieces.
- balancing rings may be provided, which are preferably mounted on both ends of the cell wheel.
- the balancing rings serve on the one hand to support the filigree cell system and also fulfill a sealing function to the adjacent exhaust pipes or charge air ducts. About the balancing rings an additional fixing of the outer jacket is possible.
- the balancing rings also serve to compensate for uneven mass distributions.
- the surface of the cell dividing walls is specifically roughened to minimize the gas friction on the cell dividing walls.
- This roughened surface structure leads to a fluidic boundary layer minimization and to an improvement of the flow conditions within the individual cells. Also, this feature of the roughened surface structure can be relatively easily and inexpensively realized in built cell wheels in contrast to casting solutions.
- the cell partitions at least partially with a catalytic coating which already causes additional exhaust gas purification processes during the charging of the exhaust gas.
- the cell rotor according to the invention can rotate with respect to the inlet angle of the gas flow through obliquely to the direction of rotation cell walls be offset.
- the cell walls can be parallel to the axis or oblique to the rotor axis.
- Another advantage of the pressure wave machine according to the invention is that with the same length of the gas channels or the individual cells, the overall length of the cell rotor can be shortened overall. This effect is all the more pronounced, the greater the angle between the central longitudinal axis of the cell rotor and the outer jacket.
- the very decisive advantage of the invention can be seen in the improved manufacturability of the cell rotor.
- the materially and / or positively connected to the outer shell or the inner jacket cell walls can be added inexpensively with high precision.
- the cell system can be mechanically connected to the adjacent jacket elements.
- brazing processes are considered.
- Possible dimensional differences can be largely reduced by non-cylindrical design, in particular by conicity of the components.
- a Nachjustieriana due to the self-centering of individual components of the pressure waves of the cell rotor is possible, as well as process changes in the production of the cell rotor and geometry changes are flexible and possible in less time.
- the supporting inner system of the cell rotor can be made by machining.
- This is a shaft with corresponding storage means, on which corresponding sealing means are provided.
- manufacturing processes such as bending, deep-drawing or hydroforming can be used for the production of the individual components of the cell rotor, wherein the choice of the manufacturing process depends essentially on the component geometry.
- the choice of the manufacturing process depends essentially on the component geometry.
- the cell dividing walls are alternately connected to one another in the region of the outer jacket and in the region of the inner jacket, and components of one in the circumferential direction of the cell rotor extending, meandering shaped cell plate are.
- Such a cell plate is brought in the assembly due to the small wall thicknesses in the desired non-cylindrical shape, in particular a cone shape, and joined with the outer shell and the inner shell.
- double Z-shaped configured cell walls are conceivable, the middle cross section of such configured cell walls so to speak forms a sheath which extends between the radially outer and radially inner region of the cell walls or cells and thus effectively forms a separation jacket.
- the cell dividing walls may be part of cell elements profiled in a U-shaped cross-section, i. are generally part of open hollow sections.
- the cell dividing walls are part of thin-walled, closed hollow profiles.
- a number of square profiles could be spaced apart around the circumference.
- FIG. 1 shows a cell rotor 1, which forms the Kem dressteil a gas-dynamic pressure wave machine for charging an internal combustion engine.
- the cell rotor 1 is rotatably mounted in a manner not shown in a housing about its longitudinal axis LA. It is located between a charge air supply line and a combustion gas exhaust line.
- the arrow A indicates the inflow direction of charge air.
- the air taken up inside the cell rotor 1 is compressed by inflowing exhaust gases flowing into the cell rotor 1 from the opposite side in the direction of the arrow B.
- the compressed intake air is expelled in the direction of the arrow C.
- the exhaust gas exits in the direction of the arrow D from the cell rotor 1.
- the cell rotor 1 has a peripherally closed outer shell 2, which is formed in this embodiment, cone-shaped. As a result, the cell rotor as a whole has the shape of a truncated cone.
- the outer periphery of the cell rotor increases from its exhaust side 3 to its charge air side 4 towards.
- the cell rotor is mounted on a shaft 5, which may be coupled in a manner not shown with drive means.
- the shaft 5 carries a frusto-conical hub 6, to which a cell structure of the cell rotor 1 is attached.
- the gas-permeable areas of the cell rotor 1 are divided into two concentric cell rings 7, 8.
- the cell rings 7, 8 are each closed in the radial direction, so that a gas exchange can take place only in the longitudinal orientation of the cell rotor 1.
- the height of the individual cells measured in the radial direction is constant. That is, the outer jacket 2 is parallel to an inner jacket 9 of the outer cell ring.
- this inner casing 9 is to be regarded as the outer casing 9 'which, together with a further radially inner inner casing 10 radially inner cell ring 8 limited in the radial direction.
- the jacket elements 2, 9, 10 are concentric with one another.
- the cell rotor 1 has a plurality of cells 11, 12, 13, 14. Between the individual cells 11-14 are cell dividing walls 15, which are formed from sheet metal elements. The cell dividing walls 11-15 are preferably materially connected by soldering or fusion welding to the respective inner shell 9, 10 or the respective outer shell 2, 9 '.
- each cell ring 7, 8 there are two cells of different circumferential extent.
- the respective cell types 11, 12; 13, 14 are preferably arranged distributed regularly over the circumference of the cell rotor 1.
- the angle W is drawn, which is measured between the outer shell 2 and the longitudinal axis LA of the cell rotor 1 and a maximum of 50 °.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Description
Die Erfindung betrifft eine gasdynamische Druckwellenmaschine zur Aufladung einer Verbrennungskraftmaschine gemäß den Merkmalen im Oberbegriff des Patentanspruchs 1.The invention relates to a gas-dynamic pressure wave machine for charging an internal combustion engine according to the features in the preamble of
Verbrennkraftmaschinen für Kraftfahrzeuge werden zur Erhöhung ihres Wirkungsgrades aufgeladen, d.h. der Füllungsgrad wird verbessert. Aufgeladene Motoren haben bei geringerem Hubraum einen geringeren spezifischen Verbrauch als Saugmotoren gleicher Leistung.Internal combustion engines for motor vehicles are charged to increase their efficiency, i. the degree of filling is improved. Charged engines have a smaller capacity and lower specific consumption than naturally aspirated engines of the same power.
Aufladesysteme, die gasdynamische Prozesse in geschlossenen Gaskanälen erzeugen und zur Aufladung nutzen, werden im Allgemeinen als Druckwellenlader oder Druckwellenmaschinen bezeichnet. Üblicherweise werden die bei Druckwellenmaschinen zum Einsatz kommenden Zellenrotoren aus gegossenem Material hergestellt. Die Zellenrotoren sind zylindrisch gestaltet und besitzen zumeist axial gerade, querschnittskonstant verlaufende Kanäle, die sich von der Heißgas- zur Kaltgasseite erstrecken. Es ist bekannt, bei Druckwellenladern, die als Ladeluftverdichter für Verbrennungsmotoren eingesetzt werden, den Rotor aktiv anzutreiben. Durch die
Aus der
Aus der
Aerodynamische Druckwellenmaschinen zählen auch durch die
Zur Verbesserung der katalytischen Effekte für die Abgase bei mittels Druckwellenmaschinen aufgeladenen Verbrennungsmotoren wird in der
Problematisch an heutigen Systemen ist das thermische Belastungskollektiv, dem die gesamte Bauteilgeometrie des Zellenrotors unterliegt. So finden sich auf der Heißgasseite des Zellenrotors Temperaturen von bis zu 1.100 °C und auf der Kaltgasseite Temperaturen von maximal 200 °C. Ein thermisch verursachter Bauteilverzug und ein daraus resultierender suboptimaler Wirkungsgrad sind die Folge. Probleme treten insbesondere bei der Spaltmaßhaltigkeit zwischen den gasführenden Elementen auf.The problem with today's systems is the thermal load collective, which is subject to the entire component geometry of the cell rotor. Temperatures of up to 1,100 ° C can be found on the hot gas side of the cell rotor and temperatures of up to 200 ° C on the cold gas side. A thermally induced component distortion and a resulting sub-optimal efficiency are the result. Problems occur in particular in the gap dimensional accuracy between the gas-conducting elements.
Bei den regelmäßig axial gerade verlaufenden Gaskanälen sind die Gaseintrittswinkel nicht optimal. Gegossene Zellenrotoren besitzen zudem ein hohes Trägheitsmoment, bedingt durch relativ große Wandstärken. Zudem ist die gießtechnische Herstellung feiner Zellstrukturen sehr kostenintensiv. Die Gussfertigung macht zudem relativ teure Kontrollverfahren erforderlich und bringt hohe Ausschussraten mit sich.In the regularly axially straight running gas channels, the gas inlet angle are not optimal. Cast cell rotors also have a high moment of inertia, due to relatively large wall thicknesses. In addition, the casting technology production of fine cell structures is very expensive. Cast manufacturing also requires relatively expensive inspection procedures and high reject rates.
Auf Grund der fertigungstechnischen Schwierigkeiten und unter Berücksichtigung der Anforderungsprofile an Druckwellenlader ist die wirtschaftliche Herstellung eines Zellenrotors unter Berücksichtigung aller Anforderungen im industriellen Maßstab sehr problematisch.Due to the manufacturing difficulties and taking into account the requirement profiles of pressure wave superchargers, the economic production of a cell rotor taking into account all requirements on an industrial scale is very problematic.
Hiervon ausgehend liegt der Erfindung die Aufgabe zu Grunde, eine gasdynamische Druckwellenmaschine zur Aufladung einer Verbrennungskraftmaschine, insbesondere im Hinblick auf die Gestaltung des Zellenrotors, in fertigungstechnischer Hinsicht zu optimieren und den Wirkungsgrad der Druckwellenmaschine zu erhöhen.On this basis, the invention is based on the object, a gas-dynamic pressure wave machine for charging an internal combustion engine, in particular with regard to the design of the Cell rotor to optimize in terms of manufacturing technology and to increase the efficiency of the pressure wave machine.
Diese Aufgabe ist bei einer gasdynamischen Druckwellenmaschine mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with a gas-dynamic pressure wave machine having the features of
Vorteilhafte Weiterbildungen des Erfindungsgedankens sind Gegenstand der abhängigen Patentansprüche.Advantageous developments of the inventive concept are the subject of the dependent claims.
Der Kerngedanke der Erfindung ist darin zu sehen, dass der Außenumfang des Zellenrotors von seiner Abgasseite zu seiner Ladeluftseite hin zunimmt. Diese im Ergebnis nicht-zylindrische Gestaltung des Zellenrotors bringt die Möglichkeit mit sich, gebaute, d.h. nicht-gegossene, Zellenrotoren mit hoher Fertigungsgenauigkeit kostengünstig herzustellen. Der Grund ist, dass die einzelnen Zellentrennwände zwischen einander benachbarten Zellen unter Einhaltung enger Maßtoleranzen, insbesondere unter Einhaltung enger Fügespalte, mit den die Zellen radial innen- und außenseitig begrenzenden Mantelelementen, d.h. außenseitig mit einem Außenmantel und innenseitig mit einem Innenmantel, verbunden werden können. Durch die nicht-zylindrische Außenkontur des Zellenrotors kann ein zuvor gefertigter Außenmantel gewissermaßen über die einzelnen Zellentrennwände gestülpt werden kann, so dass durch Verlagerung des Außenmantels oder auch des Innenmantels in Längserstreckung des Zellenrotors der Fügespalt minimal wird, was ein kostengünstiges, zuverlässiges und sehr präzises Verbinden der einzelnen Bauteile, insbesondere durch Lötprozesse oder Schmelzschweißprozesse, ermöglicht. Die Mantelelemente des Zellenrotors können daher etwas länger gestaltet sein als die einzelnen Zellentrennwände, um durch Relatiwerlagerung in Richtung der gemeinsamen Längsachse zu gewährleisten, dass der Fügespalt möglichst klein wird.The essence of the invention can be seen in the fact that the outer circumference of the cell rotor increases from its exhaust side to its charge air side. This, in effect, non-cylindrical design of the cell rotor brings with it the possibility of being built, i. non-cast, cell rotors with high manufacturing accuracy cost-effectively. The reason is that the individual cell dividing walls between adjacent cells, while maintaining close dimensional tolerances, in particular while maintaining close joining gaps, with the jacket elements radially limiting the cells inside and outside, i. on the outside with an outer sheath and the inside with an inner sheath, can be connected. Due to the non-cylindrical outer contour of the cell rotor, a previously manufactured outer sheath can be slipped over the individual cell dividing walls, so that the joint gap becomes minimal due to displacement of the outer sheath or of the inner sheath in the longitudinal extent of the cell rotor, which results in cost-effective, reliable and very precise joining the individual components, in particular by soldering or fusion welding processes enabled. The jacket elements of the cell rotor can therefore be made somewhat longer than the individual cell dividing walls in order to ensure by Relatiwerlagerung in the direction of the common longitudinal axis that the joint gap is as small as possible.
Die nicht-zylindrische Außenkontur des Zellenrotors ermöglicht zudem eine Selbstzentrierung der Mantelelemente während des Fügevorgangs. Wollte man zylindrische Zellenrotoren bauen, mussten hingegen deutlich engere Toleranzbereiche eingehalten werden, um umfangsseitig gleich bleibend geringe Fügespalte realisieren zu können.The non-cylindrical outer contour of the cell rotor also allows self-centering of the jacket elements during the joining process. On the other hand, if you wanted to build cylindrical cell rotors, you had to work much tighter Tolerance ranges are met in order to realize circumferentially consistently small joining gaps can.
Der Zellenrotor ist vorzugsweise kegelstumpfförmig ausgebildet. Diese Angabe bezieht sich auf seine Außengeometrie. Die Form der Außengeometrie bestimmt auch die Innengeometrie des Zellenrotors, da die in Radialrichtung gemessene Höhe einer Zelle über die Längserstreckung des Zellenrotors konstant bleiben soll. Dennoch nimmt die Querschnittsfläche der einzelnen Zellen von der Abgasseite zur Ladeluftseite hin zu, da die Kreisringfläche eines Zellenrings von der Ladeluftseite zur Abgasseite ebenfalls zunimmt, wobei die Anzahl der Zellen jedoch konstant bleibt. Die Vergrößerung der Querschnittsfläche in Richtung zur Abgasseite führt zu einer Reduzierung der Geschwindigkeit des Verbrennungsgases innerhalb einer Zelle und damit zu einem Druckanstieg, wodurch der durch die Druckwellenmaschine erreichte Wirkungs- und Aufladegrad erhöht werden kann.The cell rotor is preferably formed frusto-conical. This information refers to its external geometry. The shape of the outer geometry also determines the internal geometry of the cell rotor, since the height of a cell measured in the radial direction should remain constant over the longitudinal extent of the cell rotor. Nevertheless, the cross-sectional area of the individual cells increases from the exhaust side to the charge air side because the annular area of a cell ring from the charge air side to the exhaust side also increases, but the number of cells remains constant. Increasing the cross-sectional area toward the exhaust side results in a reduction in the velocity of the combustion gas within a cell and thus in a pressure increase, which can increase the efficiency and charge level achieved by the pressure wave machine.
Die erfindungsgemäßen Vorteile kommen nicht nur bei kegelstumpfförmigen Zellenrotoren zum Tragen, sondern auch dann, wenn der Außenmantel des Zellenrotors in Längserstreckung des Zellenrotors gekrümmt ist und dementsprechend auch sämtliche Zellen in ihrer Längserstreckung gekrümmt sind, in dem Sinne, dass sie auf der Kaltgasseite im größeren Abstand zur Rotationsachse des Zellenrotors verlaufen als auf der von Abgas beaufschlagten Heißgasseite. Die Krümmung kann über die Längserstreckung des Zellenrotors konstant sein. Vorzugsweise nimmt die Krümmung des Außenmantels von der Abgasseite zur Ladeluftseite hin zu. Die Mantelfläche kann daher in Längserstreckung des Zellenrotors parabolisch gekrümmt sein bzw. einen parabolischen Rotationskörper bilden. Theoretisch ist es auch möglich, gerade oder gekrümmte Kurvenabschnitte, d.h. solche mit konstanter und variabler Steigung, aneinander zu reihen mit dem Ergebnis, dass der Außenumfang des Zellenrotors von seiner Abgasseite zu seiner Ladeluftseite hin zunimmt. In jedem Fall soll aber die Höhe der Zellen konstant bleiben.The advantages of the invention are not only in frustoconical cell rotors to bear, but also when the outer jacket of the cell rotor is curved in the longitudinal extension of the cell rotor and, accordingly, all cells are curved in their longitudinal extent, in the sense that they are on the cold gas side at a greater distance to the axis of rotation of the cell rotor run as on the acted upon by exhaust gas hot gas side. The curvature may be constant over the length of the cell rotor. Preferably, the curvature of the outer shell increases from the exhaust side to the charge air side. The lateral surface can therefore be parabolically curved in the longitudinal extent of the cell rotor or form a parabolic rotational body. Theoretically, it is also possible to line straight or curved curve sections, ie those with constant and variable pitch, with the result that the outer circumference of the cell rotor increases from its exhaust side to its charge air side. In any case, however, the height of the cells should remain constant.
In praktischer Umsetzung kann der Winkel zwischen der Rotationsachse bzw. Längsachse des Zellenrotors und seinem Außenmantel bis zu 50° betragen. Der Winkel kann in Abhängigkeit von der Krümmung bzw. Steigung des Außenmantels variieren. Der Winkel ist vorzugsweise größer als 20°.In practical implementation, the angle between the axis of rotation or longitudinal axis of the cell rotor and its outer jacket can be up to 50 °. The angle may vary depending on the curvature or slope of the outer shell. The angle is preferably greater than 20 °.
Der Zellenrotor kann aus Halbzeugen unterschiedlicher Werkstoffe zusammengebaut sein. Das heißt es können insbesondere metallische Werkstoffe, insbesondere Stähle unterschiedlicher chemischer Zusammensetzung mit unterschiedlichen mechanischen Eigenschaften, zum Einsatz kommen. Beispielsweise können die einzelnen Zellen aus Dünnblechelementen gebildet sein. Hierbei kann das aus den Zellentrennwänden gebildete Gasleitgitter aus gebogenen, dünnen Blechelementen hergestellt und mit den äußeren und inneren tragenden Strukturelementen, d.h. einem Außenmantel und einem Innenmantel, verbunden sein. Die feinstrukturierten Zellentrennwände bestehen bevorzugt aus einer dünnen Edelstahlfolie mit Wandstärken, die in einem Bereich von 0,05 - 1,0 mm liegen können.The cell rotor can be assembled from semi-finished products of different materials. This means that, in particular, metallic materials, in particular steels of different chemical composition with different mechanical properties, can be used. For example, the individual cells can be formed from thin sheet metal elements. Hereby, the gas guide grid formed of the cell dividing walls can be made of bent, thin sheet metal elements and connected to the outer and inner supporting structural elements, i. an outer sheath and an inner sheath to be connected. The finely structured cell dividing walls are preferably made of a thin stainless steel foil with wall thicknesses that can be in a range of 0.05 - 1.0 mm.
Der Mantel kann aus einem durch konisches Aufweiten eines zylindrischen Rohrbauteils, d.h. durch Kaltumformung, hergestellt werden. Die Auswahl anforderungsgerechter Werkstoffe ermöglicht eine Reduzierung der Masse und in Relation zu Gussbauteilen eine signifikante Reduzierung des Massenträgheitsmoments. Gleichzeitig können die durch die einzelnen Zellentrennwände resultierenden Versperr- und Blindflächen weitestgehend reduziert werden, wobei ein Optimum zwischen möglichst vielen Zellen und möglichst geringer Blindfläche bzw. Versperrfläche angestrebt wird. Das optimale Verhältnis der Querschnittsflächen der Zellen zu der Querschnittsfläche der einzelnen Zellentrennwände ist im Wesentlichen materialabhängig, da die einzelnen Zellentrennwände starken mechanischen und thermischen Belastungen unterliegen.The jacket may be formed from a conical expansion of a cylindrical tubular component, i. by cold forming. The selection of materials suitable for the requirements enables a reduction of the mass and in relation to cast components a significant reduction of the mass moment of inertia. At the same time, the obstruction and blind surfaces resulting from the individual cell dividing walls can be reduced as much as possible, with an optimum being sought between as many cells as possible and the smallest possible blind surface or obstructive surface. The optimal ratio of the cross-sectional areas of the cells to the cross-sectional area of the individual cell dividing walls is essentially material-dependent, since the individual cell dividing walls are subject to strong mechanical and thermal stresses.
Da für die Zellentrennwände Halbzeuge mit sehr geringer Wandstärke eingesetzt werden, ist die erfindungsgemäße Bauform des Zellenrotors umfangsseitig geschlossen. Je nach Größe des Rotors können 1 bis 3 konzentrische Zellenringe, die durch konzentrische Mantelelemente voneinander getrennt sind, vorgesehen sein. Bei mehreren Zellenringen ist das die Zellenringe trennende Mantelelement gleichzeitig Außenmantel für den inneren Zellenring und Innenmantel für den äußeren Zellenring.Since semifinished products with very small wall thickness are used for the cell dividing walls, the design of the cell rotor according to the invention is closed on the periphery. Depending on the size of the rotor can be 1 to 3 concentric cell rings, which are separated by concentric shell elements, provided. In the case of several cell rings, the jacket element separating the cell rings is at the same time the outer jacket for the inner cell ring and the inner jacket for the outer cell ring.
Ein weiterer wesentlicher Aspekt der Erfindung ist die reduzierte Geräuschentwicklung der Druckwellenmaschine. Ein Zellenrotor besitzt üblicherweise über seinem gesamten Umfang gleich große Zellenquerschnitte. Es besteht allerdings die Gefahr, dass es in Verbindung mit Verbrennungskraftmaschinen zu stehenden Wellen innerhalb des Zellenrotors und dadurch zu Lärmentwicklung durch Resonanzschwingungen kommt. Bei dem erfindungsgemäßen Zellenrotor ist es möglich, auf die jeweilige Verbrennungskraftmaschine abgestimmte Druckwellenmaschinen zu bauen, indem in der Umfangserstreckung voneinander abweichende Zellen unregelmäßig über den Umfang des Zellenrotors verteilt angeordnet werden. Mit anderen Worten kann die Lärmentwicklung durch Variation der Abstände zwischen den einzelnen Zellentrennwänden extrem eingeschränkt oder sogar verhindert werden. Durch die Variation der Abstände kann die Schalldruckwelle aus dem Abgastrakt der Verbrennungskraftmaschine durch die Vielzahl der einzelnen Zellen gewissermaßen zerhackt werden, so dass austrittsseitig des Zellenrads ein gleichmäßiger Austrittsgasstrom entsteht, der nur geringe Druckschwankungen und damit minimale Schallemissionen aufweist. Der besondere Vorteil gegenüber gusstechnisch hergestellten Zellenrotoren ist, dass durch Veränderung der Position einzelner Zellentrennwände Resonanzschwingungen fertigungstechnisch einfach und zugleich kostengünstig eingeschränkt oder verhindert werden können.Another essential aspect of the invention is the reduced noise development of the pressure wave machine. A cell rotor usually has equal cell cross-sections over its entire circumference. However, there is the danger that, in conjunction with internal combustion engines, standing waves within the cell rotor and thereby noise generation due to resonance vibrations occur. In the cell rotor according to the invention, it is possible to build pressure wave machines tuned to the respective internal combustion engine by arranging irregularly distributed cells over the circumference of the cell rotor in the circumferential extent. In other words, the noise development can be extremely limited or even prevented by varying the distances between the individual cell dividing walls. By varying the distances, the sound pressure wave from the exhaust tract of the internal combustion engine can be chopped up by the plurality of individual cells, so that the outlet side of the cell a uniform exit gas flow is formed, which has only small pressure fluctuations and thus minimal acoustic emissions. The particular advantage over cell rotors produced by casting technology is that, by changing the position of individual cell dividing walls, resonant vibrations can be easily or at the same time inexpensively restricted or prevented.
Bezüglich der Verteilung der Zellen über den Umfang ist eine möglichst unregelmäßige Abfolge von Zellen unterschiedlicher Breite bzw. unterschiedlicher Umfangserstreckung vorgesehen. Im einfachsten Fall sind zwei unterschiedlich breite Zellen ungleichmäßig, d.h. mit einem möglichst unregelmäßigen Muster, über den Umfang des Zellenrotors verteilt, um Wiederholungen und damit die Möglichkeit, zu Resonanzschwingungen angeregt zu werden, zu vermeiden. Die unregelmäßige Verteilung der Zellen über den Umfang bezieht sich nicht nur auf einen einzelnen Zellenring, sondern auf die Zellen aller Zellenringe. Hierbei kann es günstig sein, wenn die relativen Abweichungen in der Umfangserstreckung zwischen den Zellen jeweils eines Zellenrings gleich sind. Wenn sich die Zellen eines Zellenrings beispielsweise in einem über 2° und im anderen Fall über 3,5° erstrecken, so gilt dieses Verhältnis auch für die Zellen weiterer Zellenringe. Bevorzugt handelt es sich bei den Zellen im Querschnitt um Kreisringstücke.With regard to the distribution of the cells over the circumference, an irregular sequence of cells of different widths or different circumferential extents is provided. In the simplest case, two cells of different widths are uneven, that is, distributed as irregularly as possible over the circumference of the cell rotor Repetitions and thus the possibility to be stimulated to resonant vibrations to avoid. The irregular distribution of the cells over the circumference refers not only to a single cell ring, but to the cells of all cell rings. In this case, it may be favorable if the relative deviations in the circumferential extent between the cells of each cell ring are the same. If the cells of a cell ring extend, for example, in one above 2 ° and in the other case above 3.5 °, then this ratio also applies to the cells of other cell rings. Preferably, the cells in cross-section are circular ring pieces.
Bei dem erfindungsgemäßen Zellenrotor können Wuchtringe vorgesehen sein, die bevorzugt auf beiden Enden des Zellenrads montiert werden. Die Wuchtringe dienen einerseits zur Abstützung des filigranen Zellensystems und erfüllen des Weiteren eine Dichtfunktion zu den angrenzenden Abgasleitungen bzw. Ladeluftleitungen. Über die Wuchtringe ist ein zusätzliches Fixieren des Außenmantels möglich. Die Wuchtringe dienen auch dazu, ungleichmäßige Masseverteilungen zu kompensieren.In the cell rotor according to the invention balancing rings may be provided, which are preferably mounted on both ends of the cell wheel. The balancing rings serve on the one hand to support the filigree cell system and also fulfill a sealing function to the adjacent exhaust pipes or charge air ducts. About the balancing rings an additional fixing of the outer jacket is possible. The balancing rings also serve to compensate for uneven mass distributions.
Ferner wird als vorteilhaft angesehen, wenn die Oberfläche der Zellentrennwände zur Minimierung der Gasreibung an den Zellentrennwänden gezielt angeraut ist. Diese angeraute Oberflächenstruktur führt zu einer strömungstechnischen Grenzschichtminimierung und zu einer Verbesserung der Strömungsverhältnisse innerhalb der einzelnen Zellen. Auch dieses Merkmal der angerauten Oberflächenstruktur lässt sich bei gebauten Zellenrädern relativ einfach und kostengünstig realisieren im Gegensatz zu Gusslösungen.Furthermore, it is considered advantageous if the surface of the cell dividing walls is specifically roughened to minimize the gas friction on the cell dividing walls. This roughened surface structure leads to a fluidic boundary layer minimization and to an improvement of the flow conditions within the individual cells. Also, this feature of the roughened surface structure can be relatively easily and inexpensively realized in built cell wheels in contrast to casting solutions.
Ferner ist es möglich, die Zellentrennwände zumindest teilweise mit einer katalytischen Beschichtung zu versehen, die bereits während der Aufladung des Abgases weitere Abgasreinigungsprozesse bewirkt.Furthermore, it is possible to provide the cell partitions at least partially with a catalytic coating which already causes additional exhaust gas purification processes during the charging of the exhaust gas.
Der erfindungsgemäße Zellenrotor kann hinsichtlich des Eintrittswinkels des Gasstroms durch schräg zur Drehrichtung verlaufende Zellenwände in Drehung versetzt werden. Die Zellenwände können achsparallel oder schräg zur Rotorachse liegen.The cell rotor according to the invention can rotate with respect to the inlet angle of the gas flow through obliquely to the direction of rotation cell walls be offset. The cell walls can be parallel to the axis or oblique to the rotor axis.
Ein weiterer Vorteil der erfindungsgemäßen Druckwellenmaschine ist, dass bei gleichbleibender Länge der Gaskanäle bzw. der einzelnen Zellen die Baulänge des Zellenrotors insgesamt verkürzt werden kann. Dieser Effekt ist umso ausgeprägter, je größer der Winkel zwischen der Mittellängsachse des Zellenrotors und dem Außenmantel ist.Another advantage of the pressure wave machine according to the invention is that with the same length of the gas channels or the individual cells, the overall length of the cell rotor can be shortened overall. This effect is all the more pronounced, the greater the angle between the central longitudinal axis of the cell rotor and the outer jacket.
Der ganz entscheidende Vorteil der Erfindung ist in der verbesserten Herstellbarkeit des Zellenrotors zu sehen. Die stoffschlüssig und/oder formschlüssig mit dem Außenmantel bzw. dem Innenmantel verbundenen Zellentrennwände lassen sich mit hoher Präzision kostengünstig fügen. Das Zellensystem kann beispielsweise mechanisch mit den benachbarten Mantelelementen verbunden werden. Als besonders günstig werden Lötprozesse angesehen. Mögliche Maßdifferenzen lassen sich durch nicht-zylindrische Ausgestaltung, insbesondere durch Konizität der Bauteile, weitestgehend reduzieren. Zudem ist eine Nachjustierbarkeit auf Grund der Selbstzentrierung einzelner Komponenten der Druckwellen des Zellenrotors möglich, ebenso wie Prozessänderungen bei der Herstellung des Zellenrotors sowie Geometrieveränderungen flexibler und in kürzerer Zeit möglich sind.The very decisive advantage of the invention can be seen in the improved manufacturability of the cell rotor. The materially and / or positively connected to the outer shell or the inner jacket cell walls can be added inexpensively with high precision. For example, the cell system can be mechanically connected to the adjacent jacket elements. As particularly favorable brazing processes are considered. Possible dimensional differences can be largely reduced by non-cylindrical design, in particular by conicity of the components. In addition, a Nachjustierbarkeit due to the self-centering of individual components of the pressure waves of the cell rotor is possible, as well as process changes in the production of the cell rotor and geometry changes are flexible and possible in less time.
Das tragende Innensystem des Zellenrotors kann durch spanende Fertigung hergestellt werden. Es handelt sich hierbei um eine Welle mit entsprechenden Lagerungsmitteln, an der auch entsprechende Abdichtmittel vorgesehen sind.The supporting inner system of the cell rotor can be made by machining. This is a shaft with corresponding storage means, on which corresponding sealing means are provided.
Grundsätzlich können zur Herstellung der einzelnen Komponenten des Zellenrotors Herstellungsverfahren wie Biegen, Tiefziehen oder Hydroformen zum Einsatz kommen, wobei die Wahl des Fertigungsverfahrens wesentlich von der,Bauteilgeometrie abhängig ist. Hierbei bestehen insbesondere bei der Ausbildung der Zellen vielfältige Möglichkeiten. Als besonders günstig wird es angesehen, wenn die Zellentrennwände abwechselnd im Bereich des Außenmantels und im Bereich des Innenmantels miteinander verbunden sind und Bestandteile eines sich in Umfangsrichtung des Zellenrotors erstreckenden, mäanderförmig gestalteten Zellenblechs sind. Ein solches Zellenblech wird bei der Montage auf Grund der geringen Wandstärken in die gewünschte nicht-zylindrische Form, insbesondere eine Kegelform, gebracht und mit dem Außenmantel sowie dem Innenmantel gefügt.In principle, manufacturing processes such as bending, deep-drawing or hydroforming can be used for the production of the individual components of the cell rotor, wherein the choice of the manufacturing process depends essentially on the component geometry. In this case, there are many possibilities, especially in the formation of the cells. It is considered to be particularly favorable when the cell dividing walls are alternately connected to one another in the region of the outer jacket and in the region of the inner jacket, and components of one in the circumferential direction of the cell rotor extending, meandering shaped cell plate are. Such a cell plate is brought in the assembly due to the small wall thicknesses in the desired non-cylindrical shape, in particular a cone shape, and joined with the outer shell and the inner shell.
Alternativ können auch einzelne Zellentrennwände verbaut werden, insbesondere solche, die im Querschnitt Z-förmig konfiguriert sind. Der jeweils obere und untere Schenkel einer Z-förmigen Zellentrennwand dient zur Fügung mit dem Außenmantel bzw. dem Innenmantel.Alternatively, it is also possible to install individual cell dividing walls, in particular those which are Z-shaped in cross section. The respective upper and lower legs of a Z-shaped cell dividing wall serve to join the outer casing or the inner casing.
Auch doppelt-Z-förmig konfigurierte Zellentrennwände sind denkbar, wobei der mittlere Querschnitt derartig konfigurierter Zellentrennwände gewissermaßen einen Mantel bildet, der sich zwischen dem radial außenliegenden und radial innenliegenden Bereich der Zellentrennwände bzw. der Zellen erstreckt und somit gewissermaßen einen Trennmantel bildet.Also, double Z-shaped configured cell walls are conceivable, the middle cross section of such configured cell walls so to speak forms a sheath which extends between the radially outer and radially inner region of the cell walls or cells and thus effectively forms a separation jacket.
Grundsätzlich ist es auch möglich, dass die Zellentrennwände Bestandteil von im Querschnitt U-förmig profilierten Zellenelementen sind, d.h. ganz allgemein Bestandteil von offenen Hohlprofilen sind. Alternativ ist es auch denkbar, dass die Zellentrennwände Bestandteil von dünnwandigen, geschlossenen Hohlprofilen sind. Beispielsweise könnte eine Reihe von Vierkantprofilen im Abstand zueinander über den Umfang verteilt angeordnet werden. Durch Variation der Abstände zwischen den einzelnen Vierkantprofilen ergibt sich auch die gewünschte Variation der Querschnitte der einzelnen Zellen.In principle, it is also possible for the cell dividing walls to be part of cell elements profiled in a U-shaped cross-section, i. are generally part of open hollow sections. Alternatively, it is also conceivable that the cell dividing walls are part of thin-walled, closed hollow profiles. For example, a number of square profiles could be spaced apart around the circumference. By varying the distances between the individual square profiles, the desired variation of the cross sections of the individual cells results.
Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellen, schematisierten Ausführungsbeispiels näher erläutert. Es zeigt:
Figur 1- einen Längsschnitt durch einen Rotor einer Druckwellenmaschine und
Figuren 2 und 3- in der Stirnansicht und in der Seitenansicht eine schematische Darstellung eines Zellenrotors.
- FIG. 1
- a longitudinal section through a rotor of a pressure wave machine and
- FIGS. 2 and 3
- in the end view and in side view a schematic representation of a cell rotor.
Wesentlich bei dem erfindungsgemäßen Zellenrotor ist sein nicht-zylindrischer Aufbau. Der Zellenrotor 1 weist einen umfangsseitig geschlossenen Außenmantel 2 auf, der in diesem Ausführungsbeispiel kegelmantelförmig ausgebildet ist. Dadurch besitzt der Zellenrotor insgesamt die Form eines Kegelstumpfes. Der Außenumfang des Zellenrotors nimmt von seiner Abgasseite 3 zu seiner Ladeluftseite 4 hin zu. Der Zellenrotor ist auf einer Welle 5 gelagert, die in nicht näher dargestellter Weise mit Antriebsmitteln gekoppelt sein kann. Die Welle 5 trägt eine kegelstumpfförmige Nabe 6, an welcher eine Zellenstruktur des Zellenrotors 1 befestigt ist. Die gasdurchlässigen Bereiche des Zellenrotors 1 sind in zwei konzentrische Zellenringe 7, 8 eingeteilt. Die Zellenringe 7, 8 sind in Radialrichtung jeweils geschlossen, so dass ein Gasaustausch nur in Längsorientierung des Zellenrotors 1 erfolgen kann. Die in Radialrichtung gemessene Höhe der einzelnen Zellen ist konstant. Das heißt, dass der Außenmantel 2 parallel zu einem Innenmantel 9 des äußeren Zellenrings ist. Dieser Innenmantel 9 ist bezüglich des innenliegenden Zellenrings als Außenmantel 9' zu betrachten, der zusammen mit einem weiteren, radial innenliegenden Innenmantel 10 den radial innenliegenden Zellenring 8 in Radialrichtung begrenzt. Die Mantelelemente 2, 9, 10 verlaufen insgesamt konzentrisch zueinander.Essential in the cell rotor according to the invention is its non-cylindrical structure. The
Anhand der
In jedem Zellenring 7, 8 befinden sich zwei Zellen unterschiedlicher Umfangserstreckung. Die jeweiligen Zellentypen 11, 12; 13, 14 sind bevorzugt regelmäßig über den Umfang des Zellenrotors 1 verteilt angeordnet.In each
In der Seitenansicht der
- 1 -1 -
- Zellenrotorcell rotor
- 2 -2 -
- Außenmantelouter sheath
- 3 -3 -
- Abgasseiteexhaust side
- 4 -4 -
- LadeluftseiteCharge air side
- 5 -5 -
- Wellewave
- 6 -6 -
- Nabehub
- 7 -7 -
- Zellenringcell ring
- 8 -8th -
- Zellenringcell ring
- 9 -9 -
- Innenmantelinner sheath
- 9' -9 '-
- Außenmantelouter sheath
- 10 -10 -
- Innenmantelinner sheath
- 11 -11 -
- Zellecell
- 12 -12 -
- Zellecell
- 13 -13 -
- Zellecell
- 14 -14 -
- Zellecell
- 15 -15 -
- Zellenwandcell wall
- LA -LA -
- Längsachselongitudinal axis
- A -A -
- Pfeilarrow
- B -B -
- Pfeilarrow
- C -C -
- Pfeilarrow
- D -D -
- Pfeilarrow
- W -W -
- Winkelangle
Claims (19)
- Gas-dynamic pressure wave machine for charging an internal combustion engine, comprising a cell rotor (1) which is rotatably mounted in a housing and is arranged between a feed line for charge air and an exhaust gas line for combustion gases, wherein the outer periphery of the cell rotor (1) increases from the exhaust gas side (3) thereof to the charge air side (4) thereof, characterised in that a height of a cell of the cell rotor (1) measured in the radial direction remains constant over the longitudinal extent of the cell rotor (1), wherein the cross-sectional area of the individual cells increases from the exhaust gas side to the charge air side.
- Pressure wave machine according to claim 1, characterised in that the cell rotor (1) has a truncated conical form.
- Pressure wave machine according to claim 1, characterised in that an outer casing (2) of the cell rotor (1) is curved in the longitudinal extent of the cell rotor (1).
- Pressure wave machine according to claim 3, characterised in that the curvature of the outer casing (2) increases from the exhaust gas side (3) to the charge air side (4).
- Pressure wave machine according to claim 4, characterised in that the outer casing (2) is parabolically curved in the longitudinal extent of the cell rotor (1).
- Pressure wave machine according to one of the claims 1 to 5, characterised in that the cell rotor (1) is assembled from semi-finished products made from different materials.
- Pressure wave machine according to one of the claims 1 to 6, characterised in that the cell rotor (1) has cell partition walls (15) extending from the exhaust gas side (3) thereof to the charge air side (4) thereof, wherein the cell partition walls (15) are made from sheet metal elements which are connected to an inner casing (9, 10) and an outer casing (2, 9').
- Pressure wave machine according to claim 7, characterised in that the cell partition walls (15) have a thickness in the range of 0.05 mm to 1.0 mm.
- Pressure wave machine according to claim 7 or 8, characterised in that the cell partition walls (15) are connected to the inner casing (9, 10) and/or the outer casing (2, 9') in bonded manner by soldering or welding.
- Pressure wave machine according to one of the claims 7 to 9, characterised in that the central partition walls (15) are connected to the inner casing (9, 10) and/or the outer casing (2, 9') in form-fitting manner.
- Pressure wave machine according to one of the claims 7 to 10, characterised in that the cell partition walls (15) are connected to one another alternately in the region of the outer casing (2, 9') thereof and in the region of the inner casing (9, 10) thereof and are components of a cell metal sheet which is configured meandering and extends in the peripheral direction of the cell rotor (1).
- Pressure wave machine according to one of the claims 7 to 10, characterised in that the cell partition walls (15) are configured double-Z-shaped in cross-section.
- Pressure wave machine according to one of the claims 1 to 12, characterised in that between 1 and 3 concentric cell rings (7, 8) are provided, wherein adjacent cell rings (7, 8) are separated from one another by a concentric casing element (9, 9').
- Pressure wave machine according to one of the claims 1 to 13, characterised in that cells (11-14) which deviate from one another in the peripheral extent are irregularly distributed over the periphery of the cell rotor (1).
- Pressure wave machine according to claim 13 or 14, characterised in that the relative deviations in the peripheral extent between the cells (11-14) of each cell ring (7, 8) are the same.
- Pressure wave machine according to one of the claims 1 to 15, characterised in that the cells (11-14) are segments of circular rings in cross-section.
- Pressure wave machine according to one of the claims 1 to 16, characterised in that at least one balancing ring is arranged on the outer periphery of the cell rotor (1).
- Pressure wave machine according to one of the claims 7 to 17, characterised in that the cell partition walls (15) have an at least partially roughened surface structure.
- Pressure wave machine according to one of the claims 7 to 18, characterised in that the cell partition walls (15) are provided at least partially with a catalytic coating.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102007021367A DE102007021367B4 (en) | 2007-05-04 | 2007-05-04 | Gas dynamic pressure wave machine |
PCT/DE2008/000693 WO2008135012A1 (en) | 2007-05-04 | 2008-04-23 | Gas-dynamic pressure wave machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2150706A1 EP2150706A1 (en) | 2010-02-10 |
EP2150706B1 true EP2150706B1 (en) | 2010-10-20 |
Family
ID=39620239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08748769A Expired - Fee Related EP2150706B1 (en) | 2007-05-04 | 2008-04-23 | Gas-dynamic pressure wave machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100154413A1 (en) |
EP (1) | EP2150706B1 (en) |
JP (1) | JP4938889B2 (en) |
KR (1) | KR101095123B1 (en) |
DE (2) | DE102007021367B4 (en) |
WO (1) | WO2008135012A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8756808B2 (en) | 2008-11-21 | 2014-06-24 | Mec Lasertec Ag | Method for producing a cellular wheel |
DE102009023217B4 (en) | 2009-05-29 | 2014-08-28 | Benteler Automobiltechnik Gmbh | Built hub for a pressure wave loader |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1056094B (en) * | 1955-05-11 | 1959-04-30 | Dudley Brian Spalding | Process and device for carrying out controlled chemical reactions in the presence of gaseous or vaporous reaction components |
GB840408A (en) * | 1958-02-28 | 1960-07-06 | Power Jets Res & Dev Ltd | Improvements in and relating to pressure exchangers |
GB920908A (en) * | 1961-01-20 | 1963-03-13 | Power Jets Res & Dev Ltd | Improvements in or relating to pressure exchangers |
GB920624A (en) * | 1961-02-21 | 1963-03-13 | Power Jets Res & Dev Ltd | Improvements in or relating to pressure exchanger cell rings |
DE1428029B2 (en) * | 1963-08-14 | 1971-12-23 | Aktiengesellschaft Brown, Boven & Cie, Baden (Schweiz) | AERODYNAMIC PRESSURE SHAFT MACHINE |
GB1058577A (en) * | 1964-07-30 | 1967-02-15 | Power Jets Res & Dev Ltd | Improvements in or relating to pressure exchanger cell rings |
US4002414A (en) * | 1971-10-21 | 1977-01-11 | Coleman Jr Richard R | Compressor-expander rotor as employed with an integral turbo-compressor wave engine |
BE790403A (en) * | 1971-10-21 | 1973-04-20 | Gen Power Corp | INTEGRAL WAVE TURBO-COMPRESSOR |
EP0143956B1 (en) * | 1983-11-30 | 1988-05-04 | BBC Brown Boveri AG | Pressure exchanger |
ATE53891T1 (en) | 1986-02-28 | 1990-06-15 | Bbc Brown Boveri & Cie | GAS-POWERED, FREE-RUNNING PRESSURE WAVE CHARGER. |
DE3906551A1 (en) * | 1989-03-02 | 1990-09-06 | Asea Brown Boveri | GAS DYNAMIC PRESSURE WAVE MACHINE |
DE3906554A1 (en) * | 1989-03-02 | 1990-09-06 | Asea Brown Boveri | GAS DYNAMIC PRESSURE WAVE MACHINE |
DD285397A5 (en) * | 1989-06-28 | 1990-12-12 | Tu Dresden,Direkt. Forsch.,Dd | GAS-DYNAMIC DRUCKELLING MACHINE WITH NON-CONSTANT CELL-SECTIONAL CUTTING |
NO168548C (en) * | 1989-11-03 | 1992-03-04 | Leif J Hauge | PRESS CHANGER. |
CH680680A5 (en) * | 1989-12-06 | 1992-10-15 | Asea Brown Boveri | |
US6606866B2 (en) * | 1998-05-12 | 2003-08-19 | Amerigon Inc. | Thermoelectric heat exchanger |
WO2000068566A2 (en) * | 1999-04-26 | 2000-11-16 | Advanced Research & Technology Institute | Wave rotor detonation engine |
JP7035730B2 (en) * | 2018-03-30 | 2022-03-15 | 住友大阪セメント株式会社 | Optical waveguide element |
-
2007
- 2007-05-04 DE DE102007021367A patent/DE102007021367B4/en not_active Expired - Fee Related
-
2008
- 2008-04-23 KR KR1020097015513A patent/KR101095123B1/en not_active IP Right Cessation
- 2008-04-23 EP EP08748769A patent/EP2150706B1/en not_active Expired - Fee Related
- 2008-04-23 DE DE502008001600T patent/DE502008001600D1/en active Active
- 2008-04-23 JP JP2010506796A patent/JP4938889B2/en not_active Expired - Fee Related
- 2008-04-23 WO PCT/DE2008/000693 patent/WO2008135012A1/en active Application Filing
- 2008-04-23 US US12/377,057 patent/US20100154413A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE502008001600D1 (en) | 2010-12-02 |
US20100154413A1 (en) | 2010-06-24 |
EP2150706A1 (en) | 2010-02-10 |
DE102007021367A1 (en) | 2008-11-13 |
WO2008135012A1 (en) | 2008-11-13 |
DE102007021367B4 (en) | 2008-12-24 |
KR20090098899A (en) | 2009-09-17 |
JP2010526242A (en) | 2010-07-29 |
JP4938889B2 (en) | 2012-05-23 |
KR101095123B1 (en) | 2011-12-16 |
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