WO2008056002A2 - Radial bearing - Google Patents
Radial bearing Download PDFInfo
- Publication number
- WO2008056002A2 WO2008056002A2 PCT/EP2007/062231 EP2007062231W WO2008056002A2 WO 2008056002 A2 WO2008056002 A2 WO 2008056002A2 EP 2007062231 W EP2007062231 W EP 2007062231W WO 2008056002 A2 WO2008056002 A2 WO 2008056002A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- radial bearing
- bearing
- radial
- bush
- housing
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/26—Systems consisting of a plurality of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
- F16C2360/24—Turbochargers
Definitions
- the invention relates to the field of exhaust gas turbochargers for supercharged internal combustion engines. It relates to a radial bearing of such exhaust gas turbocharger.
- Exhaust gas turbochargers are used to increase the performance of internal combustion engines (reciprocating engines).
- An exhaust gas turbocharger consists of an exhaust gas turbine in the exhaust gas stream of the internal combustion engine and a compressor in the intake tract of the internal combustion engine.
- the turbine wheel of the exhaust gas turbine is set in rotation by the exhaust gas flow of the engine and drives the impeller of the compressor via a shaft.
- the compressor increases the pressure in the intake tract of the internal combustion engine, so that when sucking a larger amount of air enters the combustion chambers.
- the bearing bushes of the radial bearings are often not firmly installed in the bearing housing, but floating, with radial play.
- This arrangement is referred to as squeeze oil damper.
- a positioning is needed, but which allows movement in the radial play.
- This positioning is realized in conventional exhaust gas turbochargers, for example by screwed into the bearing housing stud bolts and corresponding holes in the radial bearing bush.
- Fig. 5 shows such a prior art arrangement as used widely, such as in TPL turbochargers of the ABB company.
- the end faces of the radial bearing bushes can be designed as thrust bearings.
- the auxiliary thrust bearing is integrated into the radial bearing bush.
- the Auxiliary thrust bearing absorbs the forces against the main thrust direction.
- the force of the optionally profiled formed auxiliary bearing surface is transmitted to the bearing housing on the opposite end face of the radial bearing bush.
- a positive connection between the radial bearing bush and the surrounding bearing housing is realized to prevent the rotation of the radial bearing bush.
- the form fit to prevent rotation is realized by a contour on an end face of the radial bearing bush and in the housing. This can be dispensed with additional elements such as the stud bolts known from the prior art.
- the shape of the contour can be designed so that only a single mounting position of the radial bearing in the housing is possible.
- Fig. 1 is an isometric view of a cut, inventively designed radial bearing with a used in the bearing housing
- FIG. 2 is an isometric view of the radial bearing bush of FIG. 1;
- FIG. 3 shows a section along the shaft axis through a radial bearing designed according to the invention
- FIG. 4 shows a section along the shaft axis through an exhaust gas turbocharger with a bearing cover secured on the turbine side according to the invention
- FIG. 4 shows a section along the shaft axis through an exhaust gas turbocharger with a bearing cover secured on the turbine side according to the invention
- Fig. 5 shows a section through a radial bearing according to the prior art with a secured by means of positioning pin radial bearing bush.
- Fig. 1 shows in a view a cut radial bearing of an exhaust gas turbocharger. Not shown is the shaft which is rotatably mounted in the radial bearing.
- the bearing housing 30 which is arranged in modern exhaust gas turbochargers between the compressor and the turbine, a radial bearing bush 40 is used with low radial clearance.
- a lubrication gap supplied with oil is arranged between the bearing housing and the outer circumference of the radial bearing bush.
- a circumferential oil supply channel 42 is provided. The radial bearing bushing 40 is inserted from the left into the opening in the bearing housing in the illustrated embodiment.
- a radially projecting, circumferential federal (collar) 44 the axial displacement is limited in the direction of insertion.
- a groove 32 may be provided for receiving a retaining ring in the bearing housing.
- the locking ring 49 can be seen in the sectional view of FIG. 3 in the inserted position.
- a positive connection between the radial bearing bush and the surrounding bearing housing is realized to prevent the rotation of the radial bearing bush.
- the form fit to prevent rotation is realized in the illustrated embodiment by a contour 45 in the radially projecting collar of the radial bearing bush and a corresponding shape in the bearing housing.
- the shape of the contour can be designed so that only a single mounting position of the radial bearing bush in the bearing housing is possible, or that the radial bearing bush can be used only in a certain angular position.
- the relative position of an external oil supply to the recessed into the radial bearing bushing channels and bushings for oil supply can be adjusted.
- the force can be transmitted from the auxiliary bearing on the bearing housing on the radially projecting collar.
- the surface 41 on the end face of the radial bearing bush is designed for this purpose as a bearing surface. Due to the significantly shorter support length, the thermal reduction of the axial clearance is greatly reduced.
- FIG. 2 shows the radial bearing bush without bearing housing. Clearly visible is the circumferentially formed oil supply channel 42 and a passage for the lubricating oil through the radial bearing bush.
- FIG. 3 shows a section along the shaft of the exhaust-gas turbocharger through a radial bearing designed in accordance with the invention. If necessary, the auxiliary bearing surface 41 on the end face of the radial bearing bushing receives power from the left-adjacent rotating component, which may be the compressor wheel or a component clamped between the compressor wheel and an axial shaft shoulder. The absorbed force is transmitted via the radially projecting collar to an axial stop of the bearing housing 30.
- FIG. 4 shows a turbocharger sectional view with an embodiment of the compressor and turbine-side radial bearing according to the invention.
- the axial displacement of the turbine-side radial bearing in the direction of the turbine can be prevented by one or more webs integrated in a bearing cap 31.
- this function could be realized by a snap ring.
- the mounting screws 60 of the seal cover 31 on the bearing housing 30 with mounted shaft 20 and attached turbine wheel 10 can not be solved, the mounting screws 60 according to the invention have a predetermined breaking point 61. These break when pressed out the shaft with welded Turbinen workedem radial bearing from the bearing housing and thus protect the threaded holes in the bearing housing 30 from damage.
- the illustrated fastening screws other fasteners can be used with appropriate breaking points.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supercharger (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The invention relates to a radial bearing of an exhaust gas turbocharger, said bearing being used to mount a shaft (20) in a bearing housing (30) and comprising a radial bearing bush (40) arranged between the shaft (20) and the bearing housing (30). The radial bearing bush (40, 50) is provided with a contour (45) which engages in a corresponding contour of the bearing housing (30) and interconnects the radial bearing bush (40, 50) and the bearing housing (30) in the peripheral direction in a form-fitting manner.
Description
Rad ial lager Radial warehouse
B E S C H R E I B U N GDESCRIPTION
Technisches GebietTechnical area
Die Erfindung bezieht sich auf das Gebiet der Abgasturbolader für aufgeladene Brennkraftmaschinen. Sie betrifft ein Radiallager eines solchen Abgasturboladers.The invention relates to the field of exhaust gas turbochargers for supercharged internal combustion engines. It relates to a radial bearing of such exhaust gas turbocharger.
Stand der TechnikState of the art
Abgasturbolader werden zur Leistungssteigerung von Brennkraftmaschinen (Hubkolbenmotoren) eingesetzt. Ein Abgasturbolader besteht aus einer Abgasturbine im Abgasstrom der Brennkraftmaschine und einem Verdichter im Ansaugtrakt der Brennkraftmaschine. Das Turbinenrad der Abgasturbine wird vom Abgasstrom des Motors in Rotation versetzt und treibt über eine Welle das Laufrad des Verdichters an. Der Verdichter erhöht den Druck im Ansaugtrakt der Brennkraftmaschine, so dass beim Ansaugen eine größere Menge Luft in die Brennkammern gelangt.Exhaust gas turbochargers are used to increase the performance of internal combustion engines (reciprocating engines). An exhaust gas turbocharger consists of an exhaust gas turbine in the exhaust gas stream of the internal combustion engine and a compressor in the intake tract of the internal combustion engine. The turbine wheel of the exhaust gas turbine is set in rotation by the exhaust gas flow of the engine and drives the impeller of the compressor via a shaft. The compressor increases the pressure in the intake tract of the internal combustion engine, so that when sucking a larger amount of air enters the combustion chambers.
Zur Verbesserung der Dynamik des das Turbinenrad, das Verdichterrad und die Welle umfassenden Rotors des Abgasturboladers werden die Lagerbüchsen der Radiallager oft nicht fest ins Lagergehäuse eingebaut, sondern schwimmend, mit radialem Spiel.To improve the dynamics of the turbine wheel, the compressor wheel and the shaft comprising the rotor of the exhaust gas turbocharger, the bearing bushes of the radial bearings are often not firmly installed in the bearing housing, but floating, with radial play.
Diese Anordnung wird als Quetschöldämpfer bezeichnet. Um ein allfälliges Mitrotieren der Lagerbüchse mit der darin gelagerten Welle zu verhindern, wird eine Positionierung benötigt, welche aber eine Bewegung im radialen Spiel ermöglicht. Diese Positionierung wird in herkömmlichen Abgasturboladern beispielsweise durch ins Lagergehäuse geschraubte Stiftschrauben und entsprechende Bohrungen in der Radiallagerbüchse realisiert. Fig. 5 zeigt eine derartige Anordnung gemäss dem Stand der Technik, wie sie verbreitet, etwa in Abgasturboladern des Typs TPL der Firma ABB, verwendet werden.This arrangement is referred to as squeeze oil damper. In order to prevent any Mitrotieren the bearing bush with the shaft mounted therein, a positioning is needed, but which allows movement in the radial play. This positioning is realized in conventional exhaust gas turbochargers, for example by screwed into the bearing housing stud bolts and corresponding holes in the radial bearing bush. Fig. 5 shows such a prior art arrangement as used widely, such as in TPL turbochargers of the ABB company.
Bekannt sind auch Lösungen, bei welchen axial erstreckende Positionierungsstifte an einer Stirnseite der Radiallagerbüchse angeordnet sind.Also known are solutions in which axially extending positioning pins are arranged on an end face of the radial bearing bush.
Die Stirnseiten der Radiallagerbüchsen können als Axiallager ausgebildet sein. Im Beispiel gemäss Fig. 5 ist das Hilfs-Axiallager in die Radiallagerbüchse integriert. Das
Hilfs-Axiallager nimmt die Kräfte entgegen der Hauptschubrichtung auf. Die Kraft von der optional profiliert ausgebildeten Hilfslagerfläche wird an der gegenüberliegenden Stirnseite der Radiallagerbüchse auf das Lagergehäuse übertragen.The end faces of the radial bearing bushes can be designed as thrust bearings. In the example according to FIG. 5, the auxiliary thrust bearing is integrated into the radial bearing bush. The Auxiliary thrust bearing absorbs the forces against the main thrust direction. The force of the optionally profiled formed auxiliary bearing surface is transmitted to the bearing housing on the opposite end face of the radial bearing bush.
In der US 6 017 184 ist ein noch stärker integriertes Lagersystem offenbart. Fig.1 b dieser Patentschrift zeigt einen Lagerkörper (6) welcher sowohl das Verdichter- und das turbinenseitige Radiallager als auch die beiden Axiallager umfasst. Bei einer solchen integrierten Axiallagerung kann im Betrieb durch die Erwärmung der Bauteile dasIn US 6,017,184 an even more integrated storage system is disclosed. 1 b of this patent shows a bearing body (6) which comprises both the compressor and the turbine-side radial bearing and the two thrust bearings. In such an integrated axial bearing can in operation by the heating of the components of the
Axialspiel abnehmen, also die axiale Verschiebbarkeit des Rotors zwischen Hilfs- undRemove axial play, so the axial displacement of the rotor between auxiliary and
Hauptlager. Insbesondere wenn die Radiallagerbüchse aus einem Werkstoff (beispielsweise Bronze) mit grosserem Wärmeausdehnungskoeffizienten als Welle undOut of stock. In particular, when the radial bearing bush made of a material (for example, bronze) with a larger coefficient of thermal expansion than shaft and
Gehäuse gefertigt ist.Housing is made.
Kurze Darstellung der ErfindungBrief description of the invention
Erfindungsgemäss wird zur Verhinderung der Rotation der Radiallagerbüchse ein Formschluss zwischen der Radiallagerbüchse und dem umliegenden Lagergehäuse realisiert. Der Formschluss zur Verhinderung der Rotation wird durch eine Kontur an einer Stirnseite der Radiallagerbüchse und im Gehäuse realisiert. Damit kann auf zusätzliche Elemente wie die aus dem Stand der Technik bekannten Stiftschrauben verzichtet werden.According to the invention a positive connection between the radial bearing bush and the surrounding bearing housing is realized to prevent the rotation of the radial bearing bush. The form fit to prevent rotation is realized by a contour on an end face of the radial bearing bush and in the housing. This can be dispensed with additional elements such as the stud bolts known from the prior art.
Die Form der Kontur kann dabei so gestaltet werden, dass nur eine einzige Einbauposition des Radiallagers im Gehäuse möglich ist.The shape of the contour can be designed so that only a single mounting position of the radial bearing in the housing is possible.
Gleichzeitig verhindert ein in radialer Richtung vorstehender Bund (Kragen) an der Radiallagerbüchse deren axiale Verschiebung in eine Richtung. Bei Radiallagern mit integriertem Hilfs-Axiallager wird zudem die Kraft vom Hilfslager aufs Gehäuse über den Bund übertragen. Durch die wesentlich kürzere Abstützlänge wird die thermische Verkleinerung des Axialspiels stark reduziert. Die Kontur zur Verhinderung der Rotation der Radiallagerbüchse im Gehäuse wird vorteilhafterweise in dem Bund realisiert.At the same time prevents a radially projecting collar (collar) on the radial bearing bush their axial displacement in one direction. In the case of radial bearings with integrated auxiliary thrust bearing, the force is also transferred from the auxiliary bearing to the housing via the collar. Due to the significantly shorter support length, the thermal reduction of the axial clearance is greatly reduced. The contour for preventing the rotation of the radial bearing bush in the housing is advantageously realized in the collar.
Die axiale Verschiebung der Radiallagerbüchse in die andere Richtung wird im Betrieb durch das Hilfs-Axiallager unterbunden. Bei der Montage (Einfahren der Turbinenwelle) wird dies durch einen Sicherungsring oder eine Montagesicherungsschraube verhindert.
Kurze Beschreibung der ZeichnungenThe axial displacement of the radial bearing bush in the other direction is prevented during operation by the auxiliary thrust bearing. During assembly (retraction of the turbine shaft) this is prevented by a circlip or a mounting locking screw. Brief description of the drawings
Nachfolgend werden Ausführungsformen der Erfindung anhand von Zeichnungen detailliert erläutert. Hierbei zeigtHereinafter, embodiments of the invention will be explained in detail with reference to drawings. This shows
Fig. 1 eine isometrische Ansicht eines aufgeschnittenen, erfindungsgemäss ausgebildeten Radiallagers mit einer im Lagergehäuse eingesetztenFig. 1 is an isometric view of a cut, inventively designed radial bearing with a used in the bearing housing
Radiallagerbüchse,Radial bearing bush,
Fig. 2 eine isometrische Ansicht der Radiallagerbüchse nach Fig. 1 ,FIG. 2 is an isometric view of the radial bearing bush of FIG. 1; FIG.
Fig. 3 einen entlang der Wellenachse geführten Schnitt durch ein erfindungsgemäss ausgebildetes Radiallager, Fig. 4 einen entlang der Wellenachse geführten Schnitt durch einen Abgasturbolader mit einem erfindungsgemäss gesicherten Lagerdeckel auf der Turbinenseite, und3 shows a section along the shaft axis through a radial bearing designed according to the invention, FIG. 4 shows a section along the shaft axis through an exhaust gas turbocharger with a bearing cover secured on the turbine side according to the invention, and FIG
Fig. 5 einen Schnitt durch ein Radiallager nach dem Stand der Technik mit einer mittels Positionierungsstift gesicherten Radiallagerbüchse.Fig. 5 shows a section through a radial bearing according to the prior art with a secured by means of positioning pin radial bearing bush.
Weg zur Ausführung der ErfindungWay to carry out the invention
Fig. 1 zeigt in einer Ansicht ein aufgeschnittenes Radiallager eines Abgasturboladers. Nicht dargestellt ist die Welle, welche im Radiallager drehbar gelagert ist. In dem Lagergehäuse 30, welches bei modernen Abgasturboladern zwischen dem Verdichter und der Turbine angeordnet ist, ist eine Radiallagerbüchse 40 mit geringem radialem Spiel eingesetzt. Zwischen dem Lagergehäuse und dem äusseren Umfang der Radiallagerbüchse ist ein mit Öl versorgter Schmierspalt angeordnet. Zur Sicherstellung der Ölversorgung entlang des Umfangs der Radiallagerbüchse ist ein umlaufender Ölversorgungskanal 42 vorgesehen. Die Radiallagerbüchse 40 wird in der dargestellten Ausführungsform von links in die Öffnung im Lagergehäuse eingesetzt. Dank eines in radialer Richtung vorstehenden, umlaufenden Bundes (Kragen) 44 ist die axiale Verschiebbarkeit in die Einsetzrichtung begrenzt. Um ein herausfallen der eingesetzten Radiallagerbüchse zu verhindern, kann im Lagergehäuse eine Nut 32 zur Aufnahme eines Sicherungsringes vorgesehen sein. Der Sicherungsring 49 ist im Schnittbild der Fig. 3 in der eingesetzten Position zu sehen.
Erfindungsgemäss wird zur Verhinderung der Rotation der Radiallagerbüchse ein Formschluss zwischen der Radiallagerbüchse und dem umliegenden Lagergehäuse realisiert. Der Formschluss zur Verhinderung der Rotation wird in der dargestellten Ausführungsform durch eine Kontur 45 im radial vorstehenden Bund der Radiallagerbüchse und einer entsprechenden Ausformung im Lagergehäuse realisiert.Fig. 1 shows in a view a cut radial bearing of an exhaust gas turbocharger. Not shown is the shaft which is rotatably mounted in the radial bearing. In the bearing housing 30, which is arranged in modern exhaust gas turbochargers between the compressor and the turbine, a radial bearing bush 40 is used with low radial clearance. Between the bearing housing and the outer circumference of the radial bearing bush, a lubrication gap supplied with oil is arranged. To ensure the oil supply along the circumference of the radial bearing bush, a circumferential oil supply channel 42 is provided. The radial bearing bushing 40 is inserted from the left into the opening in the bearing housing in the illustrated embodiment. Thanks to a radially projecting, circumferential federal (collar) 44, the axial displacement is limited in the direction of insertion. To prevent falling out of the radial bearing bush used, a groove 32 may be provided for receiving a retaining ring in the bearing housing. The locking ring 49 can be seen in the sectional view of FIG. 3 in the inserted position. According to the invention a positive connection between the radial bearing bush and the surrounding bearing housing is realized to prevent the rotation of the radial bearing bush. The form fit to prevent rotation is realized in the illustrated embodiment by a contour 45 in the radially projecting collar of the radial bearing bush and a corresponding shape in the bearing housing.
Die Form der Kontur kann dabei so gestaltet werden, dass nur eine einzige Einbauposition der Radiallagerbüchse im Lagergehäuse möglich ist, oder dass die Radiallagerbüchse nur in einer bestimmten Winkellage eingesetzt werden kann. Damit kann beispielsweise die relative Lage einer externen Ölzufuhr zu den in die Radiallagerbüchse eingelassenen Kanälen und Durchführungen zur Ölversorgung gezielt eingestellt werden.The shape of the contour can be designed so that only a single mounting position of the radial bearing bush in the bearing housing is possible, or that the radial bearing bush can be used only in a certain angular position. Thus, for example, the relative position of an external oil supply to the recessed into the radial bearing bushing channels and bushings for oil supply can be adjusted.
Bei Radiallagern mit integriertem Hilfs-Axiallager, also einem Axiallager entgegen der Hauptbelastungsrichtung, kann die Kraft vom Hilfslager aufs Lagergehäuse über den radial vorstehenden Bund übertragen werden. Die Fläche 41 auf der Stirnseite der Radiallagerbüchse ist hierfür als Lagerfläche ausgebildet. Durch die wesentlich kürzere Abstützlänge wird die thermische Verkleinerung des Axialspiels stark reduziert.In radial bearings with integrated auxiliary thrust bearing, so a thrust bearing against the main load direction, the force can be transmitted from the auxiliary bearing on the bearing housing on the radially projecting collar. The surface 41 on the end face of the radial bearing bush is designed for this purpose as a bearing surface. Due to the significantly shorter support length, the thermal reduction of the axial clearance is greatly reduced.
Fig. 2 zeigt die Radiallagerbüchse ohne Lagergehäuse. Deutlich sichtbar ist der umlaufend ausgebildete Ölversorgungskanal 42 sowie eine Durchführung für das Schmieröl durch die Radiallagerbüchse. Fig. 3 zeigt einen entlang der Welle des Abgasturboladers geführten Schnitt durch ein erfindungsgemäss ausgebildetes Radiallager. Die Hilfslagerfläche 41 auf der Stirnseite der Radiallagerbüchse nimmt bei Bedarf Kraft auf vom links angrenzend angeordneten, rotierenden Bauteil, welches das Verdichterrad oder ein zwischen dem Verdichterrad und einer axialen Wellenschulter eingeklemmtes Bauteil sein kann. Die aufgenommene Kraft wird über den radial vorstehenden Bund auf einen Axialanschlag des Lagergehäuses 30 übertragen.Fig. 2 shows the radial bearing bush without bearing housing. Clearly visible is the circumferentially formed oil supply channel 42 and a passage for the lubricating oil through the radial bearing bush. FIG. 3 shows a section along the shaft of the exhaust-gas turbocharger through a radial bearing designed in accordance with the invention. If necessary, the auxiliary bearing surface 41 on the end face of the radial bearing bushing receives power from the left-adjacent rotating component, which may be the compressor wheel or a component clamped between the compressor wheel and an axial shaft shoulder. The absorbed force is transmitted via the radially projecting collar to an axial stop of the bearing housing 30.
Fig. 4 zeigt ein Turbolader-Schnittbild mit erfindungsgemässer Ausführung des Verdichter- und turbinenseitigen Radiallagers. Bei dieser Ausführung kann die axiale Verschiebung des turbinenseitigen Radiallagers in Richtung Turbine durch einen oder mehrere in einen Lagerdeckel 31 integrierte Stege unterbunden werden. Alternativ könnte diese Funktion durch einen Sicherungsring realisiert werden.
Wird ein Turbolader, etwa durch einen Defekt oder durch fehlerhafte Bedienung ohne Lagerschmierung betrieben, kann in den Lagern bereits nach kurzer Zeit ein starker Verschleiss auftreten. Im Extremfall kann aufgrund der enorm hohen Wärmeentwicklung die Welle mit der Radiallagerbüchse verschweissen. Bei einer Verschweissung im turbinenseitigen Radiallager wird die Demontage der Welle durch den Dichtungsdeckel behindert. Da die Befestigungsschrauben 60 des Dichtungsdeckels 31 am Lagergehäuse 30 bei montierter Welle 20 und daran befestigtem Turbinenrad 10 nicht gelöst werden können, verfügen die Befestigungsschrauben 60 erfindungsgemäss über eine Sollbruchstelle 61. Diese brechen beim Herauspressen der Welle mit verschweisstem turbinenseitigem Radiallager aus dem Lagergehäuse und schützen somit die Gewindebohrungen im Lagergehäuse 30 vor Beschädigungen. Anstelle der dargestellten Befestigungsschrauben können andere Befestigungsmittel mit entsprechenden Sollbruchstellen verwendet werden.
4 shows a turbocharger sectional view with an embodiment of the compressor and turbine-side radial bearing according to the invention. In this embodiment, the axial displacement of the turbine-side radial bearing in the direction of the turbine can be prevented by one or more webs integrated in a bearing cap 31. Alternatively, this function could be realized by a snap ring. If a turbocharger is operated, for example due to a defect or due to incorrect operation without bearing lubrication, a high level of wear can occur in the bearings after only a short time. In extreme cases, the shaft can be welded to the radial bearing bush due to the enormously high heat development. When welding in the turbine-side radial bearing disassembly of the shaft is hindered by the seal cover. Since the mounting screws 60 of the seal cover 31 on the bearing housing 30 with mounted shaft 20 and attached turbine wheel 10 can not be solved, the mounting screws 60 according to the invention have a predetermined breaking point 61. These break when pressed out the shaft with welded Turbinenseitigem radial bearing from the bearing housing and thus protect the threaded holes in the bearing housing 30 from damage. Instead of the illustrated fastening screws other fasteners can be used with appropriate breaking points.
Bezugszeichenliste Turbinenrad Welle des Abgasturboladers Lagergehäuse Dichtungsdeckel Nut zur Aufnahme des Sicherungsringes Verdichterseitige Radiallagerbüchse Hilfslagerfläche Ölversorgungskanal Vorstehender, umlaufender Bund Kontur Sicherungsring Turbinenseitige Radiallagerbüchse Befestigungsschrauben Sollbruchstelle in der Befestigungsschraube
Turbine wheel Turbocharger shaft Turbocharger shaft Bearing housing Seal cover Groove for holding the circlip Compressor-side radial bearing bush Auxiliary bearing surface Oil supply channel Protruding, circumferential collar Contour Circlip Turbine-side radial bearing bush Fastening screws Break point in the fastening screw
Claims
1. Radiallager eines Abgasturboladers zur Lagerung einer Welle (20) in einem Lagergehäuse (30), umfassend eine zwischen der Welle und dem Lagergehäuse angeordnete Radiallagerbüchse (40, 50), dadurch gekennzeichnet, dass die Radiallagerbüchse (40, 50) mit einer Kontur (45) versehen ist, welche zumA radial bearing of an exhaust-gas turbocharger for supporting a shaft (20) in a bearing housing (30), comprising a radial bearing bush (40, 50) arranged between the shaft and the bearing housing, characterized in that the radial bearing bush (40, 50) has a contour ( 45) is provided, which for
Eingreifen in einer entsprechenden Kontur des Lagergehäuses (30) vorgesehen ist, und welche die Radiallagerbüchse (40, 50) und das Lagergehäuse (30) in Umfangshchtung formschlüssig miteinander verbindet.Intervention is provided in a corresponding contour of the bearing housing (30), and which the radial bearing bush (40, 50) and the bearing housing (30) connects in a form-fitting manner in the circumferential direction.
2. Radiallager nach Anspruch 1 , wobei die Radiallagerbüchse (40, 50) einen radial nach aussen abstehenden Bund (44) aufweist, welcher in axialer Richtung mit einem2. Radial bearing according to claim 1, wherein the radial bearing bush (40, 50) has a radially outwardly projecting collar (44), which in the axial direction with a
Axialanschlag am Lagergehäuse (30) zusammenwirkt.Axial stop on the bearing housing (30) cooperates.
3. Radiallager nach Anspruch 2, wobei die Kontur (45) in den Bund (44) der Radiallagerbüchse (40, 50) eingelassen ist.3. Radial bearing according to claim 2, wherein the contour (45) in the collar (44) of the radial bearing bush (40, 50) is embedded.
4. Abgasturbolader, umfassend eine Welle, mindestens ein Radiallager nach einem der vorangehenden Ansprüche sowie einen Dichtungsdeckel (31 ) zum Abdichten der Radiallager, dadurch gekennzeichnet, dass die Befestigungsmittel (60) zum Befestigen des Dichtungsdeckels (31 ) am Lagergehäuse (30) eine Sollbruchstelle (61 ) aufweisen. 4. Exhaust gas turbocharger, comprising a shaft, at least one radial bearing according to one of the preceding claims and a sealing cover (31) for sealing the radial bearing, characterized in that the fastening means (60) for securing the seal cover (31) on the bearing housing (30) has a predetermined breaking point (61).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06023404 | 2006-11-10 | ||
| EP06023404.4 | 2006-11-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008056002A2 true WO2008056002A2 (en) | 2008-05-15 |
| WO2008056002A3 WO2008056002A3 (en) | 2008-12-11 |
Family
ID=39271431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/062231 WO2008056002A2 (en) | 2006-11-10 | 2007-11-12 | Radial bearing |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008056002A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018146101A1 (en) * | 2017-02-08 | 2018-08-16 | Abb Turbo Systems Ag | Plain bearing with hydrodynamic axial securing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US715006A (en) * | 1902-06-27 | 1902-12-02 | Johan Axel Bomgren | Bushing. |
| US3026152A (en) * | 1960-11-14 | 1962-03-20 | Liggio Leo Luca | Interchangeable bearings |
| US4134175A (en) * | 1977-09-01 | 1979-01-16 | Liquid Controls Corporation | Non-rotating bushing |
| WO1999007982A1 (en) * | 1997-08-06 | 1999-02-18 | Alliedsignal Inc. | Turbocharger integrated bearing system |
-
2007
- 2007-11-12 WO PCT/EP2007/062231 patent/WO2008056002A2/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US715006A (en) * | 1902-06-27 | 1902-12-02 | Johan Axel Bomgren | Bushing. |
| US3026152A (en) * | 1960-11-14 | 1962-03-20 | Liggio Leo Luca | Interchangeable bearings |
| US4134175A (en) * | 1977-09-01 | 1979-01-16 | Liquid Controls Corporation | Non-rotating bushing |
| WO1999007982A1 (en) * | 1997-08-06 | 1999-02-18 | Alliedsignal Inc. | Turbocharger integrated bearing system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018146101A1 (en) * | 2017-02-08 | 2018-08-16 | Abb Turbo Systems Ag | Plain bearing with hydrodynamic axial securing |
| US10801543B2 (en) | 2017-02-08 | 2020-10-13 | Abb Schweiz Ag | Plain bearing with hydrodynamic axial securing |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008056002A3 (en) | 2008-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE112011103128B4 (en) | Rolling element bearing insert with axial thrust damping and anti-rotation arrangements | |
| DE60121884T2 (en) | Bearing and sealing device and their installation | |
| DE102006024085B4 (en) | Turbo compressor in axial design | |
| EP2218878B1 (en) | Seal device of an exhaust gas turbocharger | |
| EP3017146B1 (en) | Rotor for a turbocharger device, turbocharger device having a rotor, and shaft for a rotor of said type | |
| EP2216517B1 (en) | Burst protection device for radial compressor | |
| DE102015200971B3 (en) | Bearing arrangement and exhaust gas turbocharger | |
| DE102016002701A1 (en) | Turbocharger turbine assembly | |
| DE102009053102B4 (en) | Turbocharger having a thrust bearing arrangement for a shaft of the turbocharger | |
| DE10210866C1 (en) | Guide blade segment fixing device for flow channel of aircraft gas turbine uses slot and hook fixing and pin fitting through latter | |
| EP2209969B1 (en) | Supercharger device | |
| DE112015000445T5 (en) | Thrust bearing arrangement with clad bearing surfaces | |
| DE102016002722A1 (en) | Turbocharger turbine nozzle and safety structure | |
| EP3047125B1 (en) | Exhaust gas turbocharger | |
| EP3456999A1 (en) | Planet gear device for a turbomachine | |
| DE102010034766B4 (en) | Bearing arrangement for the compressor side of a turbocharger of an internal combustion engine | |
| EP1186781A1 (en) | Filter/silencer mounting device for turbo charger inlet | |
| EP2725200B1 (en) | Guide blade assembly and fluid flow engine | |
| EP2772652A2 (en) | Partition for sealing the rear section of a radial compressor | |
| DE102009053101B4 (en) | Turbocharger with a turbocharger housing and a receiving device for the rotor of the turbocharger | |
| WO2008056002A2 (en) | Radial bearing | |
| EP3580465A1 (en) | Plain bearing with hydrodynamic axial securing | |
| DE102008000536B4 (en) | Exhaust gas turbocharger with burst protection for an internal combustion engine | |
| DE102017207173A1 (en) | Turbocharger with predetermined breaking point for an internal combustion engine | |
| CH698902A2 (en) | Axiallagerdichtung for an exhaust gas turbocharger. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07847144 Country of ref document: EP Kind code of ref document: A2 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 07847144 Country of ref document: EP Kind code of ref document: A2 |