EP2435675A1 - Composite hub for a pressure wave supercharger - Google Patents

Composite hub for a pressure wave supercharger

Info

Publication number
EP2435675A1
EP2435675A1 EP10722921A EP10722921A EP2435675A1 EP 2435675 A1 EP2435675 A1 EP 2435675A1 EP 10722921 A EP10722921 A EP 10722921A EP 10722921 A EP10722921 A EP 10722921A EP 2435675 A1 EP2435675 A1 EP 2435675A1
Authority
EP
European Patent Office
Prior art keywords
outer body
gas
pressure wave
hub outer
dynamic pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10722921A
Other languages
German (de)
French (fr)
Other versions
EP2435675B1 (en
Inventor
Georg Glitz
Jan Araszkiewicz
Christian Smatloch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP2435675A1 publication Critical patent/EP2435675A1/en
Application granted granted Critical
Publication of EP2435675B1 publication Critical patent/EP2435675B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to a gas-dynamic pressure wave machine for charging an internal combustion engine, having a cell rotor rotatably mounted in a housing on a shaft, which is arranged between a feed line for charge air and an exhaust gas line for combustion gases, according to the preamble of 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 are cylindrical and usually have axially straight, cross-section constant running channels extending from the hot gas to the cold gas side.
  • a built-up of sheet metal cell rotor with non-cylindrical outer contour shows the DE 10 2007 021 367 A1.
  • the supporting inner system of the cell rotor as a shaft-hub connection can be made by machining. It is a wave with corresponding storage means on which appropriate sealing means are provided.
  • the shaft carries a frusto-conical hub, to which a cell structure of the cell rotor is attached.
  • the GB 920, 624 also shows a cell rotor made of sheet metal comprising an inner and an outer cylinder and partitions which extend between the two cylinders and which in the form of a Z, a Us or an Is contact each other. Both the inner and outer cylinders are made by rolling a sheet into a cylinder of appropriate size and then welding it longitudinally. The actual shaft-hub connection about which the cell rotor rotates is not shown.
  • 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 the resulting suboptimal efficiency are the result. Problems occur in particular in the gap dimensional accuracy between the gas-conducting elements. Usually, therefore, the cell rotors used in pressure wave machines in series production for automobiles have been manufactured from cast material. However, as a cast blast machine is relatively expensive and heavy, the efforts are increasingly towards a sheet metal rotor.
  • the shaft-hub connection including a hub outer body receiving the connection, has remained as a casting due to component complexity.
  • anisotropic thermal stress it is problematic to choose different materials for the cell structure of the rotor and the hub.
  • a gas-dynamic pressure wave machine for charging an internal combustion engine with a rotatably mounted in a housing on a shaft cell rotor, which is arranged between a feed air and an exhaust pipe for combustion gases, the shaft in a tube made of sheet metal Hub outer body is received and the bore for the shaft receiving in J of a hub fixed in the hub body formed disk or in that in the hub outer body, a smaller diameter pipe is attached as the tube of the hub outer body which receives the shaft.
  • the hub outer body may consist of a higher quality sheet material corresponding to the cell rotor. The interior of the hub outer body then allows a new degree of freedom in terms of material selection.
  • the disc may be a manufactured by casting or forging component, in which a bore for the shaft receiving is introduced.
  • the disc may also be a relatively simple stamped part.
  • the disc is provided with recesses in the manner of a rim star.
  • the rim star the component size and thus also the corresponding weight are limited to a minimum even with a cast disk.
  • a shaft is picked up and fastened.
  • the rim star or the disc are joined with an inner wall of the hub outer body, for example, welded or soldered.
  • the entire hub is built from sheet metal parts.
  • an inner tube smaller diameter than the hub outer body is used to receive the shaft.
  • This inner tube of smaller diameter is then radially held by means of a separate sheet metal part in the hub outer body.
  • the shaft receiving inner tube extends only over a partial length of the outer hub body. It is sufficiently thick-walled to withstand the stresses.
  • the holder of the tube then takes place again about one or more items.
  • These are preferably sheet metal parts.
  • the sheet metal part may be mounted in the hub outer body radially or at an angle to the cross-sectional plane of the hub outer body.
  • the sheet metal part may be convex or concave curved to compensate for stresses, manufacturing tolerances and / or heat distortion.
  • a plurality of sheet metal parts between inner tube and hub outer body are preferably provided, which are spaced apart.
  • the inner wall of the hub outer body can be machined in the contour to ensure a snug fit of individual parts or to compensate for tolerances.
  • one or more heat shields are provided in the hub outer body at a distance from the shaft holder, which protect the sensitive bearings of the shaft against the exhaust gas temperatures of up to 950 ° C.
  • Figure 1 shows a section through a hub according to the invention
  • FIG. 2 shows a section through a further embodiment of a hub according to the invention.
  • FIG. 3 shows a longitudinal section through a pressure wave loader in the region of
  • FIG. 1 shows a hub 1 according to the invention without a shaft in longitudinal section.
  • the hub 1 has a cylindrical hub outer body 2, in which an inner tube 3 via convexly arranged sheet metal parts 4a, 4b is supported.
  • the sheet metal parts 4a, 4b in this case enclose a substantially biconvex shape between them.
  • the sheet metal parts 4a, 4b consequently do not run parallel to a cross-sectional plane AA. So that the air trapped between the sheet metal parts 4a, 4b can expand under thermal load, a recess (not shown in greater detail) for gas exchange is provided in the sheet metal parts 4a, 4b.
  • Figure 2 shows a similar structure, but here is the inner tube 3 via a biconcave shape between them enclosing sheet metal parts 5a, 5b set in the hub outer body 2.
  • the sheet metal parts 5a, 5b are thus formed concave to each other.
  • the hub outer body 2 consists of a drawn or welded sheet metal tube, the same applies to the inner tube 3.
  • the inner tube 3 serves to receive the shaft, not shown. In a region 20, 21, the possible contours of a processing of the inner wall of the hub outer body 2 are shown.
  • hub outer body 2, inner tube 3 and sheet metal parts 4a, 4b, 5a, 5b can have different materials.
  • the hub 1 is overall easier and more flexible to produce. •
  • FIG. 3 shows a pressure wave machine 6 in longitudinal section.
  • the pressure wave machine 6 has a cell rotor 7, which consists of two rows 7a, 7b of cells which are separated from each other by a plate 7c.
  • the rows 7a, 7b of the cell rotor 7 are arranged around a cylindrical hub outer body 71 around.
  • the cell rotor 7 is connected to the hub outer body 71 and rotatably supported via the connection thereof to a shaft 13.
  • the cell rotor 7 is surrounded by a fixed double-walled housing 8, which is connectable via a housing connection 9 with a hot gas side B, not shown.
  • the shaft 13 is rotatably supported by ball bearings 14. At its end facing away from the cell rotor 7, the shaft 13 is attached to a drive motor, not shown.
  • the ball bearings 14 are protected by cover and seals 15a, 15b against contamination.
  • the hub outer body 71 as the inner tube of the cell rotor 7 consists of a seamlessly drawn or welded tube.
  • the inner wall of the hub outer body 71 has a machined contour 72, to provide a snug fit for three consecutive heat shields 16, which are connected by a screw 17 with each other.
  • the heat shields 16 separate the hot gas side B from the cold gas side C inside the hub outer body 71.
  • the first of the heat shields 16, which faces the hot gas side B has a gas-tight construction.
  • a machined contour 73 is provided in the hub outer body 71, in which the cast housing 12 is inserted with sufficient clearance for unimpeded rotation of the cell rotor 7.
  • the shaft 13 is inserted into a disc 18 in the form of a cast rim star and screwed by a screw 19 with the disc 18.
  • the disc 18 is integrally connected to the hub outer body 71.
  • the materials of the disc 18 and the hub outer body 71 may differ from each other.
  • the individual structure of the inventive shaft-hub connection is more complex than a one-piece molding of a hub.
  • the single structure pays off but for larger quantities on the amount and is lighter overall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

The invention proposes that the shaft-hub connection of a rotatable cell rotor (7) of a gas-dynamic pressure wave machine (6) for charging a combustion engine be composed of individual sheet metal parts having a hub outer body made of a tube, or of a mixture of hub outer bodies (71), and a disk (18) as a cast shaft holder. According to the invention, this is to replace a shaft-hub connection that is a solid casting.

Description

Gebaute Nabe für einen Druckwellenlader Built hub for a pressure wave loader
Die Erfindung betrifft eine gasdynamische Druckwellenmaschine zur Aufladung einer Verbrennungskraftmaschine, mit einem in einem Gehäuse auf einer Welle drehbar gelagerten Zellenrotor, der zwischen einer Zuleitung für Ladeluft und einer Abgasleitung für Verbrennungsgase angeordnet ist, nach dem Oberbegriff von Anspruch 1.The invention relates to a gas-dynamic pressure wave machine for charging an internal combustion engine, having a cell rotor rotatably mounted in a housing on a shaft, which is arranged between a feed line for charge air and an exhaust gas line for combustion gases, according to the preamble of claim 1.
Aufladesysteme, die gasdynamische Prozesse in geschlossenen Gaskanälen erzeugen und zur Aufladung nutzen, werden im Allgemeinen als Druckwellenlader oder Druckwellenmaschinen bezeichnet. Die Zellenrotoren sind zylindrisch gestaltet und besitzen zumeist axial gerade, querschnittskonstant verlaufende Kanäle, die sich von der Heißgas- zur Kaltgasseite erstrecken. Einen aus Blechteilen aufgebauten Zellenrotor mit nicht-zylindrischer Außenkontur zeigt die DE 10 2007 021 367 A1. Das tragende Innensystem des Zellenrotors als Welle-Nabe-Verbindung kann durch spanende Fertigung hergestellt werden. Es handelt sich hierbei um eine Welle mit entsprechenden Lagerungsmitteln, an der auch entsprechende Abdichtmittel vorgesehen sind. Die Welle trägt dabei eine kegelstumpfförmige Nabe, an welcher eine Zellenstruktur des Zellenrotors befestigt ist.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 are cylindrical and usually have axially straight, cross-section constant running channels extending from the hot gas to the cold gas side. A built-up of sheet metal cell rotor with non-cylindrical outer contour shows the DE 10 2007 021 367 A1. The supporting inner system of the cell rotor as a shaft-hub connection can be made by machining. It is a wave with corresponding storage means on which appropriate sealing means are provided. The shaft carries a frusto-conical hub, to which a cell structure of the cell rotor is attached.
Die GB 920, 624 zeigt ebenfalls einen aus Blech gebauten Zellenrotor aus einem inneren und einem äußeren Zylinder und Zwischenwänden, die sich zwischen den beiden Zylindern erstrecken und die sich in Form eines Z, eines Us oder eines Is jeweils gegenseitig berühren. Sowohl der innere als auch der äußere Zylinder sind dadurch hergestellt, dass ein Blech zu einem Zylinder entsprechender Größe zusammengerollt und dann Längsnaht geschweißt wird. Die eigentliche Welle-Nabe-Verbindung, um die der Zellenrotor rotiert, ist nicht weiter dargestellt.The GB 920, 624 also shows a cell rotor made of sheet metal comprising an inner and an outer cylinder and partitions which extend between the two cylinders and which in the form of a Z, a Us or an Is contact each other. Both the inner and outer cylinders are made by rolling a sheet into a cylinder of appropriate size and then welding it longitudinally. The actual shaft-hub connection about which the cell rotor rotates is not shown.
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 Gas führenden Elementen auf. Üblicherweise wurden daher die bei Druckwellenmaschinen bisher in der Serienproduktion für Automobile zum Einsatz gekommenen Zellenrotoren aus gegossenem Material hergestellt. Da eine gegossene Druckwellenmaschine aber relativ teuer und schwer ausfällt, gehen die Bestrebungen vermehrt in Richtung eines aus Blech gebauten Rotors. Die Welle-Nabe-Verbindung inklusive einem die Verbindung aufnehmenden Nabenaußenkörper verblieben bisher aufgrund der Bauteilkomplexität jedoch als Gussteil. Allerdings ist es aufgrund der anisotrophen thermischen Belastung problematisch, unterschiedliche Werkstoffe für die Zellenstruktur des Rotors und die Nabe zu wählen. Außerdem ergibt sich durch die bisher verwendeten hochtemperaturfesten Werkstoffe eine aufwändige, langsame Bearbeitung zum Fertigmaß. Es ist daher die Aufgabe der vorliegenden Erfindung, eine verbesserte gasdynamische Druckwellenmaschine mit einer leichteren und mit geringerem Fertigungsaufwand herstellbaren Welle-Nabe-Verbindung aufzuzeigen.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 the resulting suboptimal efficiency are the result. Problems occur in particular in the gap dimensional accuracy between the gas-conducting elements. Usually, therefore, the cell rotors used in pressure wave machines in series production for automobiles have been manufactured from cast material. However, as a cast blast machine is relatively expensive and heavy, the efforts are increasingly towards a sheet metal rotor. However, the shaft-hub connection, including a hub outer body receiving the connection, has remained as a casting due to component complexity. However, due to the anisotropic thermal stress, it is problematic to choose different materials for the cell structure of the rotor and the hub. In addition, results from the high-temperature resistant materials used so far a complex, slow processing to finished size. It is therefore the object of the present invention to provide an improved gas-dynamic pressure wave machine with a lighter and producible with less manufacturing effort shaft-hub connection.
Diese Aufgabe löst die Erfindung, indem bei einer gasdynamischen Druckwellenmaschine zur Aufladung einer Verbrennungskraftmaschine, mit einem in einem Gehäuse auf einer Welle drehbar gelagerten Zellenrotor, der zwischen einer Zuleitung für Ladeluft und einer Abgasleitung für Verbrennungsgase angeordnet ist, die Welle in einem Rohr aus Blech als Nabenaußenkörper aufgenommen ist und die Bohrung für die Wellenaufnahme inJ einer in dem Nabenaußenkörper befestigten Scheibe ausgebildet ist oder dadurch, dass in dem Nabenaußenkörper ein Stück Rohr kleineren Durchmessers als das Rohr des Nabenaußenkörpers befestigt ist, welches die Welle aufnimmt. Der Nabenaußenkörper kann dabei entsprechend dem Zellenrotor aus einem höherwertigen Blechmaterial bestehen. Das Innenleben des Nabenaußenkörpers ermöglicht dann einen neuen Freiheitsgrad in Bezug auf die Werkstoffauswahl. Die Scheibe kann ein durch Gießen oder Schmieden hergestelltes Bauteil sein, in welches eine Bohrung für die Wellenaufnahme eingebracht ist. Alternativ kann die Scheibe auch ein relativ einfaches Stanzteil sein. Bevorzugt ist die Scheibe mit Ausnehmungen nach Art eines Felgensterns versehen. Durch den Felgenstern werden die Bauteilgröße und damit auch das entsprechende Gewicht selbst bei einer gegossenen Scheibe auf ein Minimum begrenzt. In der Bohrung des Felgensterns wird eine Welle aufgenommen und befestigt. Der Felgenstern oder die Scheibe werden mit einer Innenwand des Nabenaußenkörpers gefügt, beispielsweise verschweißt oder verlötet.This object is achieved by the invention in that in a gas-dynamic pressure wave machine for charging an internal combustion engine, with a rotatably mounted in a housing on a shaft cell rotor, which is arranged between a feed air and an exhaust pipe for combustion gases, the shaft in a tube made of sheet metal Hub outer body is received and the bore for the shaft receiving in J of a hub fixed in the hub body formed disk or in that in the hub outer body, a smaller diameter pipe is attached as the tube of the hub outer body which receives the shaft. The hub outer body may consist of a higher quality sheet material corresponding to the cell rotor. The interior of the hub outer body then allows a new degree of freedom in terms of material selection. The disc may be a manufactured by casting or forging component, in which a bore for the shaft receiving is introduced. Alternatively, the disc may also be a relatively simple stamped part. Preferably, the disc is provided with recesses in the manner of a rim star. By the rim star the component size and thus also the corresponding weight are limited to a minimum even with a cast disk. In the hole of the rim star, a shaft is picked up and fastened. The rim star or the disc are joined with an inner wall of the hub outer body, for example, welded or soldered.
Bevorzugt wird die gesamte Nabe aus Blechteilen gebaut. Dazu wird ein inneres Rohr kleineren Durchmessers als der Nabenaußenkörper eingesetzt, um die Welle aufzunehmen. Dieses innere Rohr kleineren Durchmessers wird dann mittels eines separaten Blechteils im Nabenaußenkörpers radial gehaltert. Das die Welle aufnehmende innere Rohr erstreckt sich dabei nur über eine Teillänge des äußeren Nabenkörpers. Es ist ausreichend dickwandig, um den Belastungen standzuhalten. Die Halterung des Rohres erfolgt dann wiederum über ein oder mehrere Einzelteile. Bevorzugt handelt es sich hierbei um Blechteile. Das Blechteil kann im Nabenaußenkörper radial oder in einem Winkel zur Querschnittsebene des Nabenaußenkörpers angebracht werden. Insbesondere kann das Blechteil konvex oder konkav gekrümmt sein, um Spannungen, Fertigungstoleranzen und/oder Wärmeverzug auszugleichen. Um einen sicheren Sitz des inneren Rohres zu gewährleisten, sind bevorzugt mehrere Blechteile zwischen innerem Rohr und Nabenaußenkörper vorgesehen, die voneinander beabstandet sind. Die innere Wandung des Nabenaußenkörpers kann in der Kontur bearbeitet sein, um einen Passsitz einzelner Teile zu gewährleisten oder Toleranzen auszugleichen. Bevorzugt sind in den Nabenaußenkörper mit Abstand zur Wellenaufnahme ein oder mehrere Hitzeschilde eingebracht, die die empfindlichen Lager der Welle vor den bis zu 950° C heißen Abgastemperaturen schützen.Preferably, the entire hub is built from sheet metal parts. For this purpose, an inner tube smaller diameter than the hub outer body is used to receive the shaft. This inner tube of smaller diameter is then radially held by means of a separate sheet metal part in the hub outer body. The shaft receiving inner tube extends only over a partial length of the outer hub body. It is sufficiently thick-walled to withstand the stresses. The holder of the tube then takes place again about one or more items. These are preferably sheet metal parts. The sheet metal part may be mounted in the hub outer body radially or at an angle to the cross-sectional plane of the hub outer body. In particular, the sheet metal part may be convex or concave curved to compensate for stresses, manufacturing tolerances and / or heat distortion. To ensure a secure fit of the inner tube, a plurality of sheet metal parts between inner tube and hub outer body are preferably provided, which are spaced apart. The inner wall of the hub outer body can be machined in the contour to ensure a snug fit of individual parts or to compensate for tolerances. Preferably, one or more heat shields are provided in the hub outer body at a distance from the shaft holder, which protect the sensitive bearings of the shaft against the exhaust gas temperatures of up to 950 ° C.
Nachfolgend ist die Erfindung anhand der Figuren näher erläutert. Dabei zeigen:The invention is explained in more detail below with reference to the figures. Showing:
Figur 1 einen Schnitt durch eine erfindungsgemäße Nabe;Figure 1 shows a section through a hub according to the invention;
Figur 2 einen Schnitt durch eine weitere Ausführungsform einer erfindungsgemäßen Nabe und2 shows a section through a further embodiment of a hub according to the invention and
Figur 3 einen Längsschnitt durch einen Druckwellenlader im Bereich der3 shows a longitudinal section through a pressure wave loader in the region of
Welle-Nabe-Verbindung.Shaft-hub connection.
Figur 1 zeigt eine erfindungsgemäße Nabe 1 ohne Welle im Längsschnitt. Die Nabe 1 weist einen zylindrischen Nabenaußenkörper 2 auf, in dem ein inneres Rohr 3 über konvex zueinander angeordnete Blechteile 4a, 4b gehaltert ist. Die Blechteile 4a, 4b schließen hierbei eine im Wesentlichen bikonvexe Form zwischen sich ein. Die Blechteile 4a, 4b verlaufen folglich nicht parallel zu einer Querschnittsebene A-A. Damit sich die zwischen den Blechteilen 4a, 4b eingeschlossene Luft unter thermischer Belastung ausdehnen kann, sind in den Blechteilen 4a, 4b nicht näher dargestellte Ausnehmung für einen Gasaustausch vorgesehen. Figur 2 zeigt einen ähnlichen Aufbau, allerdings ist hier das innere Rohr 3 über eine bikonkave Form zwischen sich einschließende Blechteile 5a, 5b im Nabenaußenkörper 2 festgelegt. Die Blechteile 5a, 5b sind somit konkav zueinander geformt. Der Nabenaußenkörper 2 besteht aus einem aus Blech gezogenen oder geschweißten Rohr, gleiches gilt für das innere Rohr 3. Das innere Rohr 3 dient zur Aufnahme der nicht gezeigten Welle. In einem Bereich 20, 21 sind die möglichen Konturen einer Bearbeitung der Innenwand des Nabenaußenkörpers 2 dargestellt. Durch den erfindungsgemäßen Konstruktionsaufbau können Nabenaußenkörper 2, inneres Rohr 3 und Blechteile 4a, 4b, 5a, 5b verschiedene Materialien aufweisen. Die Nabe 1 wird insgesamt leichter und flexibler herstellbar. • FIG. 1 shows a hub 1 according to the invention without a shaft in longitudinal section. The hub 1 has a cylindrical hub outer body 2, in which an inner tube 3 via convexly arranged sheet metal parts 4a, 4b is supported. The sheet metal parts 4a, 4b in this case enclose a substantially biconvex shape between them. The sheet metal parts 4a, 4b consequently do not run parallel to a cross-sectional plane AA. So that the air trapped between the sheet metal parts 4a, 4b can expand under thermal load, a recess (not shown in greater detail) for gas exchange is provided in the sheet metal parts 4a, 4b. Figure 2 shows a similar structure, but here is the inner tube 3 via a biconcave shape between them enclosing sheet metal parts 5a, 5b set in the hub outer body 2. The sheet metal parts 5a, 5b are thus formed concave to each other. The hub outer body 2 consists of a drawn or welded sheet metal tube, the same applies to the inner tube 3. The inner tube 3 serves to receive the shaft, not shown. In a region 20, 21, the possible contours of a processing of the inner wall of the hub outer body 2 are shown. As a result of the construction according to the invention, hub outer body 2, inner tube 3 and sheet metal parts 4a, 4b, 5a, 5b can have different materials. The hub 1 is overall easier and more flexible to produce. •
Figur 3 zeigt eine Druckwellenmaschine 6 im Längsschnitt. Die Druckwellenmaschine 6 weist einen Zellenrotor 7 auf, welcher aus zwei Reihen 7a, 7b von Zellen besteht, die durch ein Blech 7c voneinander getrennt sind. Die Reihen 7a, 7b des Zellenrotors 7 sind um einen zylindrischen Nabenaußenkörper 71 herum angeordnet. Der Zellenrotor 7 ist mit dem Nabenaußenkörper 71 verbunden und über dessen Verbindung zu einer Welle 13 drehbar gelagert. Der Zellenrotor 7 ist von einem feststehenden doppelwandigen Gehäuse 8 umgeben, welches über eine Gehäuseanbindung 9 mit einer nicht näher dargestellten Heißgasseite B verbindbar ist. Auf einer der Heißgasseite B gegenüberliegenden Kaltgasseite C ist der Zellenrotor 7 mit einem Ansaugtrakt 10 und einer Ladeluftleitung 11 verbunden. Sowohl Ansaugtrakt 10 als auch Ladeluftleitung 11 befinden sich in einem gemeinsamen Gussgehäuse 12.FIG. 3 shows a pressure wave machine 6 in longitudinal section. The pressure wave machine 6 has a cell rotor 7, which consists of two rows 7a, 7b of cells which are separated from each other by a plate 7c. The rows 7a, 7b of the cell rotor 7 are arranged around a cylindrical hub outer body 71 around. The cell rotor 7 is connected to the hub outer body 71 and rotatably supported via the connection thereof to a shaft 13. The cell rotor 7 is surrounded by a fixed double-walled housing 8, which is connectable via a housing connection 9 with a hot gas side B, not shown. On one of the hot gas side B opposite cold gas side C of the cell rotor 7 with an intake manifold 10 and a charge air line 11 is connected. Both intake tract 10 and charge air line 11 are located in a common casting housing 12.
In dem Gussgehäuse 12 ist die Welle 13 über Kugellager 14 drehbar gelagert. An ihrem dem Zellenrotor 7 abgewandten Ende wird die Welle 13 an einem nicht näher dargestellten Antriebsmotor befestigt. Die Kugellager 14 sind über Deckel und Dichtungen 15a, 15b gegen Verschmutzungen geschützt.In the cast housing 12, the shaft 13 is rotatably supported by ball bearings 14. At its end facing away from the cell rotor 7, the shaft 13 is attached to a drive motor, not shown. The ball bearings 14 are protected by cover and seals 15a, 15b against contamination.
Erfindungsgemäß besteht der Nabenaußenkörper 71 als inneres Rohr des Zellenrotors 7 aus einem nahtlos gezogenen oder geschweißten Rohr. Die Innenwand des Nabenaußenkörpers 71 weist eine bearbeitete Kontur 72 auf, um einen Passsitz für drei hintereinander liegende Hitzeschilde 16 zu schaffen, welche mittels einer Schraube 17 miteinander verbunden sind. Die Hitzeschilde 16 trennen die Heißgasseite B von der Kaltgasseite C im Inneren des Nabenaußenkörpers 71. Damit sich die zwischen den drei Hitzeschilden 16 eingeschlossene Luft unter thermischer Belastung ausdehnen kann, sind die beiden der Kaltgasseite C zugewandten Hitzeschilde 16 mit einer nicht näher dargestellten Ausnehmung für einen Gasaustausch versehen. Der erste der Hitzeschilde 16, welcher der Heißgasseite B zugewandt ist, weist eine gasdichte Ausführung auf.According to the invention, the hub outer body 71 as the inner tube of the cell rotor 7 consists of a seamlessly drawn or welded tube. The inner wall of the hub outer body 71 has a machined contour 72, to provide a snug fit for three consecutive heat shields 16, which are connected by a screw 17 with each other. The heat shields 16 separate the hot gas side B from the cold gas side C inside the hub outer body 71. Thus, the trapped between the three heat shields 16 air can expand under thermal load, the two of the cold gas side C facing heat shields 16 with a recess, not shown for a Gas exchange provided. The first of the heat shields 16, which faces the hot gas side B, has a gas-tight construction.
Weiterhin ist in dem Nabenaußenkörper 71 eine bearbeitete Kontur 73 vorgesehen, in der das Gussgehäuse 12 mit genügend Spiel für eine ungehinderte Drehbarkeit des Zellenrotors 7 eingeschoben ist. Die Welle 13 ist in eine Scheibe 18 in Form eines gegossenen Felgensterns eingesteckt und über eine Schraube 19 mit der Scheibe 18 verschraubt. Die Scheibe 18 ist mit dem Nabenaußenkörper 71 stoffschlüssig verbunden.Furthermore, a machined contour 73 is provided in the hub outer body 71, in which the cast housing 12 is inserted with sufficient clearance for unimpeded rotation of the cell rotor 7. The shaft 13 is inserted into a disc 18 in the form of a cast rim star and screwed by a screw 19 with the disc 18. The disc 18 is integrally connected to the hub outer body 71.
In vorteilhafter Weise können somit die Materialien der Scheibe 18 und des Nabenaußenkörpers 71 voneinander abweichen. Zwar ist der Einzelaufbau der erfindungsgemäß gebauten Welle-Nabe-Verbindung komplexer als ein einteiliges Gießen einer Nabe. Der Einzelaufbau rechnet sich aber bei größeren Stückzahlen über die Menge und ist insgesamt leichter. Advantageously, thus, the materials of the disc 18 and the hub outer body 71 may differ from each other. Although the individual structure of the inventive shaft-hub connection is more complex than a one-piece molding of a hub. The single structure pays off but for larger quantities on the amount and is lighter overall.
Bezugszeichen:Reference numerals:
1 - Nabe1 - hub
2 - Nabenaußenkörper2 - hub outer body
3 - inneres Rohr 4a - Blechteil 4b - Blechteil3 - inner tube 4a - sheet metal part 4b - sheet metal part
5a - Blechteil5a - sheet metal part
5b - Blechteil5b - sheet metal part
6 - Druckwellenmaschine6 - Pressure wave machine
7 - Zellenrotor7 - cell rotor
7a - Reihe von Zellen7a - series of cells
7b - Reihe von Zellen7b - row of cells
7c - Blech zwischen 7a und 7b7c - sheet between 7a and 7b
8 - Gehäuse8 - housing
9 - Gehäuseanbindung9 - housing connection
10 - Ansaugtrakt10 - intake tract
11 - Ladeluftleitung11 - Charge air line
12 - Gussgehäuse12 - cast housing
13 - Welle13 - wave
14 - Kugellager14 - Ball bearings
15a - Deckel und Dichtung15a - cover and seal
15b - Deckel und Dichtung15b - Lid and gasket
16 - Hitzeschild16 - heat shield
17 - Schraube17 - screw
18 - Scheibe18 - disc
19 - Schraube19 - screw
20 - Bereich von 220 - range of 2
21 - Bereich von 221 - range of 2
71 - Nabenaußenkörper71 - hub outer body
72 - bearbeitete Kontur72 - machined contour
73 - bearbeitete Kontur A-A- Querschnittsebene B - Heißgasseite C - Kaltgasseite 73 - machined contour AA cross-sectional plane B - hot gas side C - cold gas side

Claims

Patentansprüche claims
1. Gasdynamische Druckwellenmaschine (6) zur Aufladung einer Verbrennungskraftmaschine, mit einem in einem Gehäuse (8) auf einer Welle (13) drehbar gelagerten Zellenrotor (7), der zwischen einer Leitung für Ladeluft und einer Abgasleitung für Verbrennungsgase angeordnet ist, d ad u rch geken nzeich net, dass die Welle (13) in einem Rohr aus Blech als Nabenaußenkörper (2, 71 ) aufgenommen ist und dass die Bohrung für die Wellenaufnahme in einer in dem Nabenaußenkörper (71 ) befestigten Scheibe (18) ausgebildet ist oder dass in dem Nabenaußenkörper (2) ein inneres Rohr (3) kleineren Durchmessers als das Rohr des Nabenaußenkörpers (2) befestigt ist, in dem die Welle (13) aufgenommen ist.1. A gas-dynamic pressure wave machine (6) for charging an internal combustion engine, with a in a housing (8) on a shaft (13) rotatably mounted cell rotor (7), which is arranged between a line for charge air and an exhaust pipe for combustion gases, d ad u that the shaft (13) is received in a sheet metal tube as the hub outer body (2, 71), and that the shaft receiving bore is formed in a washer (18) secured in the hub outer body (71) or in to the hub outer body (2) is fixed an inner tube (3) of smaller diameter than the tube of the hub outer body (2) in which the shaft (13) is received.
2. Gasdynamische Druckwellenmaschine (6) nach Anspruch 1 , dad u rch geken nzeich net, dass die Scheibe (18) mit Ausnehmungen nach Art eines Felgensterns versehen ist.2. Gas-dynamic pressure wave machine (6) according to claim 1, dad u rch geken nzeich net, that the disc (18) is provided with recesses in the manner of a rim star.
3. Gasdynamische Druckwellenmaschine (6) nach Anspruch 1 , dad u rch geken nzeich net, dass das innere Rohr (3) mittels eines separaten Blechteils (4a, 4b, 5a, 5b) im Nabenaußenkörpers (2) radial gehaltert ist.3. Gas-dynamic pressure wave machine (6) according to claim 1, dad u rch geken nzeich net that the inner tube (3) by means of a separate sheet metal part (4 a, 4 b, 5 a, 5 b) radially in the hub outer body (2) is supported.
4. Gasdynamische Druckwellenmaschine (6) nach Anspruch 3, dad u rch gekennzeich net, d ass das Blechteil (4a, 4b, 5a, 5b) im Nabenaußenkörper (2) in einem Winkel zu einer Querschnittsebene (A-A) des Nabenaußenkörpers (2) angebracht ist.4. A gas-dynamic pressure wave machine (6) according to claim 3, dad u rch gekennzeich net, d ass the sheet metal part (4a, 4b, 5a, 5b) in the hub outer body (2) at an angle to a cross-sectional plane (AA) of the hub outer body (2) is.
5. Gasdynamische Druckwellenmaschine (6) nach einem der vorangegangenen Ansprüche 3 und 4, dad u rch geken nzeich net, dass das Blechteil (4a, 4b, 5a, 5b) im Nabenaußenkörper (2) konvex oder konkav gekrümmt ausgeführt ist.5. Gas-dynamic pressure wave machine (6) according to one of the preceding claims 3 and 4, dad u rch geken nzeich net that the sheet metal part (4 a, 4 b, 5 a, 5 b) in the hub outer body (2) is convex or concave curved.
6. Gasdynamische Druckwellenmaschine (6) nach einem der vorangegangenen Ansprüche 3 bis 5, dad u rch geken nzeich net, dass mehrere Blechteile (4a, 4b, 5a, 5b) im Nabenaußenkörper (2) vorgesehen sind.6. Gas-dynamic pressure wave machine (6) according to one of the preceding claims 3 to 5, dad u rch geken nzeich net, in that a plurality of sheet-metal parts (4a, 4b, 5a, 5b) are provided in the hub outer body (2).
7. Gasdynamische Druckwellenmaschine (6) nach Anspruch 6, dad u rch geken nzeich net, dass in mindestens einem der Blechteile (4a, 4b, 5a, 5b) eine Ausnehmung für einen Gasaustausch vorgesehen ist.7. Gas-dynamic pressure wave machine (6) according to claim 6, dad u rch geken net nets that in at least one of the sheet metal parts (4 a, 4 b, 5 a, 5 b) is provided a recess for a gas exchange.
8. Gasdynamische Druckwellenmaschine (6) nach einem der vorangegangenen Ansprüche 1 bis 7, dad u rch geken nzeich net, dass eine innere Wand des Nabenaußenkörpers (71 ) eine bearbeitete Kontur (72, 73) aufweist.8. Gas-dynamic pressure wave machine (6) according to one of the preceding claims 1 to 7, dad u rch geken net nets that an inner wall of the hub outer body (71) has a machined contour (72, 73).
9. Gasdynamische Druckwellenmaschine (6) nach einem der vorangegangenen Ansprüche 1 bis 8, dad u rch geken nzeich net, dass mit Abstand zur Wellenaufnahme ein oder mehrere Hitzeschilde (16) im Nabenaußenkörper (71 ) angebracht sind.9. Gas-dynamic pressure wave machine (6) according to one of the preceding claims 1 to 8, dad u rch geken net nets that at a distance from the shaft receiving one or more heat shields (16) in the hub outer body (71) are mounted.
10. Gasdynamische Druckwellenmaschine (6) nach Anspruch 9, dad u rch geken nzeich net, d ass in mindestens einem Hitzeschild (16) eine Ausnehmung für einen Gasaustausch vorgesehen ist. 10. Gas-dynamic pressure wave machine (6) according to claim 9, dad u rch geken nzeich net, d ass is provided in at least one heat shield (16) has a recess for a gas exchange.
EP10722921.3A 2009-05-29 2010-04-24 Built hub for pressure wave exchanger Not-in-force EP2435675B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009023217.6A DE102009023217B4 (en) 2009-05-29 2009-05-29 Built hub for a pressure wave loader
PCT/DE2010/000465 WO2010136005A1 (en) 2009-05-29 2010-04-24 Composite hub for a pressure wave supercharger

Publications (2)

Publication Number Publication Date
EP2435675A1 true EP2435675A1 (en) 2012-04-04
EP2435675B1 EP2435675B1 (en) 2013-07-17

Family

ID=42395002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10722921.3A Not-in-force EP2435675B1 (en) 2009-05-29 2010-04-24 Built hub for pressure wave exchanger

Country Status (5)

Country Link
US (1) US20120114469A1 (en)
EP (1) EP2435675B1 (en)
JP (1) JP5414892B2 (en)
DE (1) DE102009023217B4 (en)
WO (1) WO2010136005A1 (en)

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Also Published As

Publication number Publication date
DE102009023217A1 (en) 2010-12-09
US20120114469A1 (en) 2012-05-10
WO2010136005A1 (en) 2010-12-02
EP2435675B1 (en) 2013-07-17
DE102009023217B4 (en) 2014-08-28
JP2012527578A (en) 2012-11-08
JP5414892B2 (en) 2014-02-12

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