DE102012207010A1 - Exhaust gas turbocharger has lubricating oil collecting space that is provided between both floating bush bodies and stands in connection with lubricating oil supplying bore, from which radial bearing is guided from lubricating oil - Google Patents
Exhaust gas turbocharger has lubricating oil collecting space that is provided between both floating bush bodies and stands in connection with lubricating oil supplying bore, from which radial bearing is guided from lubricating oil Download PDFInfo
- Publication number
- DE102012207010A1 DE102012207010A1 DE201210207010 DE102012207010A DE102012207010A1 DE 102012207010 A1 DE102012207010 A1 DE 102012207010A1 DE 201210207010 DE201210207010 DE 201210207010 DE 102012207010 A DE102012207010 A DE 102012207010A DE 102012207010 A1 DE102012207010 A1 DE 102012207010A1
- Authority
- DE
- Germany
- Prior art keywords
- lubricating oil
- radial
- exhaust gas
- gas turbocharger
- floating bush
- 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.)
- Ceased
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/166—Sliding contact bearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/18—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or brushing, rotatable at a reduced speed
-
- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/1045—Details of supply of the liquid to the bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Supercharger (AREA)
Abstract
Description
Die Erfindung betrifft einen Abgasturbolader mit einem zwei Radiallager aufweisenden Lagergehäuse.The invention relates to an exhaust gas turbocharger with a two radial bearing bearing housing.
Abgasturbolader benötigen eine radiale Lagerung, um radiale Kräfte vom Läufer des Abgasturboladers ausgehend abstützen zu können und den Läufer in seiner Position zu halten. Bei einer Verwendung von Gleitlagern ist es notwendig, eine Schmierölzufuhr zu den Lagerstellen sicherzustellen. Kommen Schwimmbuchsenlager zum Einsatz, dann werden in den als Radiallager dienenden Schwimmbuchsenkörper in Radialrichtung verlaufende Bohrungen eingebracht, um den inneren Schmierspalt mit Schmieröl zu versorgen. Treten bei derartigen Schwimmbuchsenlagerungen hohe Drehzahlen auf, dann wird die Schmierölversorgung des inneren Schmierspaltes durch die Fliehkraft und den dadurch ausgelösten Druckverlust verringert. Dies kann zu einer Mangelschmierung und sogar bis hin zu einer Zerstörung des als Radiallager dienenden Schwimmbuchsenlagers führen. Exhaust gas turbochargers require a radial bearing in order to be able to support radial forces from the rotor of the exhaust-gas turbocharger and to keep the rotor in its position. When using plain bearings, it is necessary to ensure a lubricating oil supply to the bearings. If floating bush bearings are used, bores extending in the radial direction are then introduced into the floating bush body serving as a radial bearing in order to supply the inner lubricating gap with lubricating oil. Occur in such floating bushings high speeds, then the lubricating oil supply of the inner lubrication gap is reduced by the centrifugal force and thereby triggered pressure loss. This can lead to a lack of lubrication and even to the destruction of serving as a radial bearing floating bush bearing.
Ein Radiallager, welches eine in einem Gehäuse gelagerte Welle und einen zwischen dem Gehäuse und der Welle vorgesehenen Schwimmbuchsenkörper aufweist, wobei zwischen der Welle und dem Schwimmbuchsenkörper ein innerer Schmierspalt und zwischen dem Gehäuse und dem Schwimmbuchsenkörper ein äußerer Schmierspalt vorliegen, ist in der
In der
Um einer Verringerung der Schmierölversorgung des inneren Schmierspaltes entgegenzuwirken wurde bereits versucht, den Zuführdruck des Schmieröles bei hohen Drehzahlen zu erhöhen, so dass der durch die Drehung des Radiallagers verursachte Druckverlust ausgeglichen wird. Eine alternative Maßnahme besteht darin, die Drehzahl des Schwimmbuchsenkörpers beispielsweise durch geeignete konstruktive Maßnahmen nicht zu stark ansteigen zu lassen. Des Weiteren kann auch der Pumpeffekt des Radiallagers, der aufgrund der Drehung Schmieröl in den Spalt zieht, zur Vermeidung einer Mangelschmierung genutzt werden. Dieser Pumpeffekt kann durch konstruktive Maßnahmen erhöht werden, beispielsweise durch eine Ausstattung des Radiallagers mit Längsnuten. To counteract a reduction in the lubricating oil supply of the inner lubrication gap has already been trying to increase the supply pressure of the lubricating oil at high speeds, so that the pressure loss caused by the rotation of the radial bearing is compensated. An alternative measure is not to let the rotational speed of the floating bush body, for example by appropriate design measures to increase too much. Furthermore, the pumping effect of the radial bearing, which draws lubricating oil into the gap due to the rotation, can also be used to avoid a lack of lubrication. This pumping effect can be increased by constructive measures, for example by equipping the radial bearing with longitudinal grooves.
In der
Die Aufgabe der Erfindung besteht darin, einen Abgasturbolader mit einem Radiallager aufweisenden Lagergehäuse anzugeben, bei welchem die Schmierölzufuhr des Radiallagers verbessert ist. The object of the invention is to provide an exhaust gas turbocharger having a radial bearing bearing housing, in which the lubricating oil supply of the radial bearing is improved.
Diese Aufgabe wird durch einen Abgasturbolader mit den im Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben. This object is achieved by an exhaust gas turbocharger with the features specified in claim 1. Advantageous embodiments and further developments of the invention are specified in the dependent claims.
Gemäß der vorliegenden Erfindung ist ein Abgasturbolader mit einem zwei Radiallager aufweisenden Lagergehäuse ausgestattet, wobei die Radiallager eine im Lagergehäuse gelagerte Welle umschließen, in Axialrichtung voneinander beabstandet sind und jeweils einen zwischen dem Lagergehäuse und der Welle vorgesehenen Schwimmbuchsenkörper aufweisen, wobei zwischen der Welle und dem Schwimmbuchsenkörper jeweils ein innerer Schmierspalt und zwischen dem Lagergehäuse und dem Schwimmbuchsenkörper jeweils ein äußerer Schmierspalt vorliegt, wobei das Lagergehäuse eine in Radialrichtung verlaufende Schmierölzuführbohrung aufweist und wobei zwischen den beiden Schwimmbuchsenkörpern ein mit der Schmierölzuführbohrung in Verbindung stehender Schmierölsammelraum vorgesehen ist, von welchem aus das Schmieröl in axialer Richtung in die Schmierspalte der Radiallager leitbar ist. According to the present invention, an exhaust gas turbocharger is equipped with a bearing housing having two radial bearings, wherein the radial bearings enclose a shaft mounted in the bearing housing, are spaced apart in the axial direction and each one between the Have bearing housing and the shaft provided floating bush body, wherein between the shaft and the floating bush body in each case an inner lubrication gap and between the bearing housing and the floating bush body is in each case an outer lubrication gap, wherein the bearing housing has a running in the radial direction Schmierölzuführbohrung and wherein between the two Schwimmbuchsenkörpern one with the Lubricating oil feed hole is provided in connection with the lubricating oil collecting space, from which the lubricating oil in the axial direction in the lubricating gaps of the radial bearings can be conducted.
Die Vorteile der Erfindung bestehen insbesondere darin, dass die Schwimmbuchsenkörper keine in Radialrichtung verlaufenden Bohrungen benötigen, durch welche das Schmieröl vom äußeren Schmierspalt in den inneren Schmierspalt geleitet wird. Bei der vorliegenden Erfindung erfolgt die Schmierölzufuhr zu den Schmierspalten ausgehend von einem zwischen den Schwimmbuchsenkörpern positionierten Schmierölsammelraum jeweils in axialer Richtung. Dies hat den Vorteil, dass ein durch Fliehkräfte hervorgerufener Druckverlust vermieden wird. Des Weiteren werden die Axiallager jeweils im Bereich ihrer gesamten Schmierspalte mit Schmieröl versorgt. Dies erhöht in vorteilhafter Weise den Schmieröldurchsatz durch die Radiallager, wodurch wiederum die Kühlung der Radiallager verbessert wird. The advantages of the invention are, in particular, that the floating bush body need not extend in the radial direction holes through which the lubricating oil is passed from the outer lubrication gap in the inner lubrication gap. In the present invention, the lubricating oil supply to the lubrication gaps takes place starting from a lubricating oil collecting space positioned between the floating bush bodies, in each case in the axial direction. This has the advantage that a pressure loss caused by centrifugal forces is avoided. Furthermore, the thrust bearings are each supplied with lubricating oil in the area of their entire lubrication gaps. This advantageously increases the lubricating oil flow through the radial bearings, which in turn improves the cooling of the radial bearings.
Weitere Vorteile der Erfindung bestehen darin, dass die Tragfähigkeit der Radiallager durch eine niedrigere Viskosität aufgrund der niedrigeren Temperatur des Schmieröls steigt und dass durch eine Überhitzung des Schmieröls hervorgerufene Ölverkokungen vermieden werden. Further advantages of the invention are that the bearing capacity of the radial bearings increases due to a lower viscosity due to the lower temperature of the lubricating oil and that oil coking caused by overheating of the lubricating oil is avoided.
Sind in den Lagern Längsnuten vorgesehen, dann können sich innerhalb der Schmierspalte mehrere Druckberge bilden, was die Stabilität und die Dämpfung der Lager erhöht. Des Weiteren wird aufgrund dieser Längsnuten die Förderleistung der Radiallager erhöht, da eine größere Menge Schmieröl in die Schmierspalte befördert werden kann.If longitudinal grooves are provided in the bearings, then several pressure peaks can form within the lubrication gaps, which increases the stability and the damping of the bearings. Furthermore, due to these longitudinal grooves, the delivery capacity of the radial bearings is increased because a larger amount of lubricating oil can be conveyed into the lubrication gaps.
Weitere vorteilhafte Eigenschaften der Erfindung ergeben sich aus deren nachfolgender beispielhafter Erläuterung anhand der
Die
Die beiden Radiallager sind in Axialrichtung voneinander beabstandet angeordnet. Zum ersten Radiallager gehört ein Schwimmbuchsenkörper
Im Bereich zwischen den beiden Schwimmbuchsenkörpern
Vom Schmierölsammelraum
Es ist ersichtlich, dass bei der gezeigten Ausführungsform im Lagergehäuse
Die
Alternativ zu der in der
Die
Des Weiteren ist ersichtlich, dass dieser Schwimmbuchsenkörper sowohl an seiner radialen Außenfläche als auch an seiner radialen Innenfläche glatt ausgebildet ist. Er enthält in diesen Bereichen weder Bohrungen noch Nuten. Auch an seinen Stirnseiten sind keine Nuten vorgesehen. Derartige Schwimmbuchsenkörper können bei einem mit den erfindungsgemäßen Merkmalen ausgestatteten Abgasturbolader verwendet werden, wenn die vom Schmierölsammelraum ausgehende, in Axialrichtung erfolgende Schmierölversorgung in allen Betriebspunkten des Abgasturboladers zu einem ausreichenden Schmierfilm in allen Schmierspalten führt. Furthermore, it can be seen that this floating sleeve body is smooth on both its radially outer surface and on its radially inner surface. It contains no holes or grooves in these areas. Also on its faces no grooves are provided. Such floating bush body can be used in a equipped with the features of the invention exhaust gas turbocharger when the outgoing oil from the lubricating oil, taking place in the axial direction lubricating oil supply leads to a sufficient lubricating film in all lubrication gaps in all operating points of the exhaust gas turbocharger.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102012202341 [0006] DE 102012202341 [0006]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210207010 DE102012207010A1 (en) | 2012-04-27 | 2012-04-27 | Exhaust gas turbocharger has lubricating oil collecting space that is provided between both floating bush bodies and stands in connection with lubricating oil supplying bore, from which radial bearing is guided from lubricating oil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210207010 DE102012207010A1 (en) | 2012-04-27 | 2012-04-27 | Exhaust gas turbocharger has lubricating oil collecting space that is provided between both floating bush bodies and stands in connection with lubricating oil supplying bore, from which radial bearing is guided from lubricating oil |
Publications (1)
Publication Number | Publication Date |
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DE102012207010A1 true DE102012207010A1 (en) | 2013-10-31 |
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ID=49323250
Family Applications (1)
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DE201210207010 Ceased DE102012207010A1 (en) | 2012-04-27 | 2012-04-27 | Exhaust gas turbocharger has lubricating oil collecting space that is provided between both floating bush bodies and stands in connection with lubricating oil supplying bore, from which radial bearing is guided from lubricating oil |
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DE (1) | DE102012207010A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2913485A1 (en) * | 2014-02-26 | 2015-09-02 | Toyota Jidosha Kabushiki Kaisha | Bearing structure for a turbocharger |
CN108700113A (en) * | 2016-03-01 | 2018-10-23 | 三菱重工发动机和增压器株式会社 | Bearing unit and exhaust gas turbocharger |
DE102017213492A1 (en) | 2017-08-03 | 2019-02-07 | Continental Automotive Gmbh | Floating bush bearing for an exhaust gas turbocharger |
DE102017213502A1 (en) | 2017-08-03 | 2019-02-07 | Continental Automotive Gmbh | Floating bush bearing for an exhaust gas turbocharger |
DE102018002930A1 (en) | 2018-04-11 | 2019-10-17 | Daimler Ag | Arrangement of a thrust bearing on a bearing housing for an exhaust gas turbocharger, in particular for a motor vehicle |
US20210301680A1 (en) * | 2020-03-24 | 2021-09-30 | Borgwarner Inc. | Bearing housing assembly and turbocharger including the same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH407665A (en) * | 1964-04-06 | 1966-02-15 | Buechi Alfred Johann Dipl Masc | Storage of centrifugal machine rotors |
US20080098735A1 (en) * | 2006-10-25 | 2008-05-01 | Gutknecht Daniel A | Bearing Spacer and Housing |
DE102008046582A1 (en) * | 2008-09-10 | 2010-03-11 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Exhaust gas turbocharger for internal combustion engine, particularly motor vehicle, has shaft, which is pivoted in housing of exhaust gas turbocharger |
US8075191B2 (en) * | 2009-09-28 | 2011-12-13 | Honeywell International Inc. | Helical inner diameter groove journal bearing |
DE102012202341A1 (en) | 2012-02-16 | 2013-08-22 | Continental Automotive Gmbh | Radial bearing for supercharger for motor car, has non-intersecting grooves which are helically formed around outer surface of shaft, so as to enhance lubrication oil supply by hole of floating socket |
-
2012
- 2012-04-27 DE DE201210207010 patent/DE102012207010A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH407665A (en) * | 1964-04-06 | 1966-02-15 | Buechi Alfred Johann Dipl Masc | Storage of centrifugal machine rotors |
US20080098735A1 (en) * | 2006-10-25 | 2008-05-01 | Gutknecht Daniel A | Bearing Spacer and Housing |
DE102008046582A1 (en) * | 2008-09-10 | 2010-03-11 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Exhaust gas turbocharger for internal combustion engine, particularly motor vehicle, has shaft, which is pivoted in housing of exhaust gas turbocharger |
US8075191B2 (en) * | 2009-09-28 | 2011-12-13 | Honeywell International Inc. | Helical inner diameter groove journal bearing |
DE102012202341A1 (en) | 2012-02-16 | 2013-08-22 | Continental Automotive Gmbh | Radial bearing for supercharger for motor car, has non-intersecting grooves which are helically formed around outer surface of shaft, so as to enhance lubrication oil supply by hole of floating socket |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2913485A1 (en) * | 2014-02-26 | 2015-09-02 | Toyota Jidosha Kabushiki Kaisha | Bearing structure for a turbocharger |
CN108700113A (en) * | 2016-03-01 | 2018-10-23 | 三菱重工发动机和增压器株式会社 | Bearing unit and exhaust gas turbocharger |
EP3425220A4 (en) * | 2016-03-01 | 2019-03-20 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | BEARING DEVICE AND EXHAUST TURBINE SUPERCURRENT COMPRESSOR |
CN108700113B (en) * | 2016-03-01 | 2020-07-17 | 三菱重工发动机和增压器株式会社 | Bearing device and exhaust gas turbocharger |
DE102017213492A1 (en) | 2017-08-03 | 2019-02-07 | Continental Automotive Gmbh | Floating bush bearing for an exhaust gas turbocharger |
DE102017213502A1 (en) | 2017-08-03 | 2019-02-07 | Continental Automotive Gmbh | Floating bush bearing for an exhaust gas turbocharger |
WO2019025128A1 (en) | 2017-08-03 | 2019-02-07 | Continental Automotive Gmbh | Floating bush bearing for a turbocharger |
DE102018002930A1 (en) | 2018-04-11 | 2019-10-17 | Daimler Ag | Arrangement of a thrust bearing on a bearing housing for an exhaust gas turbocharger, in particular for a motor vehicle |
US20210301680A1 (en) * | 2020-03-24 | 2021-09-30 | Borgwarner Inc. | Bearing housing assembly and turbocharger including the same |
US11280218B2 (en) * | 2020-03-24 | 2022-03-22 | Borgwarner Inc. | Bearing housing assembly and turbocharger including the same |
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