US20110031067A1 - Turbocharger Lubrication Feed Adapter - Google Patents
Turbocharger Lubrication Feed Adapter Download PDFInfo
- Publication number
- US20110031067A1 US20110031067A1 US12/534,929 US53492909A US2011031067A1 US 20110031067 A1 US20110031067 A1 US 20110031067A1 US 53492909 A US53492909 A US 53492909A US 2011031067 A1 US2011031067 A1 US 2011031067A1
- Authority
- US
- United States
- Prior art keywords
- groove
- fitting according
- radial hole
- radial
- central channel
- 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.)
- Abandoned
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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
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
-
- 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
Definitions
- the present invention relates to turbochargers for internal combustion engines and more particularly to a simplified assembly of and arrangement for lubricating the bearing system of a turbocharger.
- Turbochargers are widely used on internal combustion engines, and particularly used on large diesel engines, especially for highway trucks. Turbochargers are driven by the engine exhaust gases. Exhaust gases are directed to and drive a turbine, and the turbine shaft is connected to and drives the compressor. The compressor compresses ambient air and feeds the compressed air into the intake manifold of the engine.
- the turbine shaft is typically supported on two bearings within a central housing between the turbine and the compressor.
- Lubricating oil is supplied through a port in the central housing wall and split through oil channels to feed both bearings.
- Turbochargers commonly use crankcase oil to lubricate the rotating bearing interfaces as well as the thrust surfaces that limit axial excursions of the shaft and its turbine and compressor wheels.
- turbochargers and bearing lubrication systems can be found in U.S. Pat. Nos. 6,709,160; 4,902,144; 6,418,722 and 5,076,766, herein incorporated by reference.
- the oil inlet connection comprises a cylindrical fitting or adapter that is surrounded by an o-ring.
- the cylindrical fitting is fit into the inlet opening and held there by a clamp fixture that is bolted to the center housing.
- An oil delivery tube is pressed into the fitting and seal welded or brazed thereto.
- Resilient seal ring materials such as elastomeric O-ring materials
- the recommended high temperature limit is 400 degrees F. While the temperature around the O-ring is below this limit during normal operating conditions, it is possible that for some applications, for a short duration immediately after an engine is shut down the temperature around the o-ring could exceed this limit.
- one or more small holes are added to a turbocharger oil inlet tube fitting or adapter through a groove that holds a seal ring, such as an O-ring, so that the oil passing through the tube also reduces the temperature of the seal ring during engine operation by the oil quenching or flowing over the seal ring during operation.
- the holes are located closer to the bottom edge of the groove to maintain a leak free joint.
- the adapter should provide a reduced operating temperature for the seal ring for normal operating conditions and should prevent excessive temperature after shut down of the engine.
- the disclosed embodiment of the invention provides a fitting for attaching one conduit to another conduit.
- the fitting includes a body having a cylindrical sidewall with a central through-channel and an annular groove on an outside thereof for holding a seal ring, such as an O-ring.
- the sidewall has at least one radial hole connecting the central channel and the groove.
- the at least one radial hole can comprise a plurality of radial holes, the holes spaced apart around a circumference of the cylindrical body.
- the radial holes each can have a diameter of between 1 ⁇ 4 and 1 ⁇ 3 of a width of the groove taken along an axial direction of the cylindrical sidewall.
- the embodiment is particularly suited to connecting an oil feed tube to a bearing housing of a turbocharger.
- FIG. 1 is a front elevation view, taken in section, of a turbocharger incorporating a lubrication tube fitting in accordance with an exemplary embodiment of the invention
- FIG. 2 is a fragmentary perspective view of a lubrication tube assembly taken from FIG. 1 ;
- FIG. 3 is a side view of the lubrication tube assembly of FIG. 2 , removed from the turbocharger, with an o-ring removed to show underlying features;
- FIG. 4 is a side view of a lubrication tube fitting taken from FIG. 3 ;
- FIG. 5 is a sectional view taken generally along line 5 - 5 of FIG. 4 with the o-ring added.
- a turbocharger assembly 20 is shown generally in FIG. 1 .
- the assembly includes a turbine housing 22 , a compressor housing 24 , and a bearing or center housing 26 disposed between the turbine and compressor housings.
- a turbine wheel 30 is fixed on a shaft 32 with the turbine wheel 30 surrounded by the turbine housing 22 and the shaft 32 extending through the bearing housing 26 and into the compressor housing 24 .
- a compressor wheel 36 is mounted on the shaft 32 in the compressor housing 24 .
- the bearing housing 26 has a central bore 40 that includes bearing lands 44 , 46 .
- a pair of bearings 50 , 52 are received in the bearing lands 44 , 46 , respectively.
- a lubricant which is normally engine crankcase lubricating oil, is introduced under pressure through a lubricant inlet port 54 formed in the bearing housing 26 .
- the inlet port 54 is a simple straight bore in the housing 26 that communicates with the central bore 40 in the bearing housing.
- lubricant migrates axially outwardly along the shaft 32 in both axial directions in the space between the shaft 32 and the central bore 40 toward the journal bearings 50 , 52 .
- the journal bearings 50 , 52 it is constrained to flow through a plurality of flow paths around the journal bearings and into a pair of oil collection spaces 56 , 58 and from there into an oil collection sump 60 where it is returned to the engine crankcase in a conventional manner.
- an inlet tube fitting 70 is fit into the inlet port 54 and sealed against an inside wall of the port by a seal ring, such as an O-ring 76 .
- the inlet tube fitting 70 is fixed into the port 54 by a separate retaining clamp 78 that has a collar end portion 80 with a hole 82 that receives the tube fitting 70 .
- the collar end portion closely surrounds a socket end portion 86 and presses down against a shoulder 84 of the tube fitting 70 when an anchor leg 88 of the clamp 78 is fastened to the center housing 26 by a machine screw or bolt 94 .
- the inlet tube fitting 70 includes a groove 102 for receiving a seal ring, formed between a barrel portion 104 and a head portion 106 of the inlet tube fitting 70 .
- the socket end portion 86 includes a tube-receiving socket 110 that is open into a central channel 114 of the fitting 70 .
- a conduit such as a tube 118 is tightly pressed into the socket and brazed, welded or otherwise sealed all around a circular outside interface 122 between the tube 118 and the socket end portion 86 .
- Lubricating oil flows through the tube 118 , through the central channel 114 and into the port 54 .
- the compressed O-ring 76 seals the oil flow within the central housing 26 .
- At least one radial hole 128 is provided through the fitting 70 within the groove 102 .
- four such holes 128 are provided, rotationally spaced apart at 90 degrees about a central axis 130 of the fitting 70 .
- the holes 128 can have a diameter of about one third to one fourth of a width of the groove 102 , taken along the axis 130 .
- the number of holes and the diameter of the holes can be varied and are still encompassed by the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Gasket Seals (AREA)
Abstract
A fitting or adapter for attaching connecting an oil feed tube to a bearing housing of a turbocharger includes a body having a cylindrical sidewall with a central through-channel and an annular groove on an outside thereof for holding a seal ring, such as an O-ring. The sidewall has a plurality of radial holes, the holes spaced apart around a circumference of the cylindrical body and each connecting the central channel and the groove. The radial holes each can have a diameter of between ¼ and ⅓ of a width of the groove taken along an axial direction of the cylindrical sidewall.
Description
- The present invention relates to turbochargers for internal combustion engines and more particularly to a simplified assembly of and arrangement for lubricating the bearing system of a turbocharger.
- Turbochargers are widely used on internal combustion engines, and particularly used on large diesel engines, especially for highway trucks. Turbochargers are driven by the engine exhaust gases. Exhaust gases are directed to and drive a turbine, and the turbine shaft is connected to and drives the compressor. The compressor compresses ambient air and feeds the compressed air into the intake manifold of the engine.
- The turbine shaft is typically supported on two bearings within a central housing between the turbine and the compressor. Lubricating oil is supplied through a port in the central housing wall and split through oil channels to feed both bearings. Turbochargers commonly use crankcase oil to lubricate the rotating bearing interfaces as well as the thrust surfaces that limit axial excursions of the shaft and its turbine and compressor wheels.
- Some examples of turbochargers and bearing lubrication systems can be found in U.S. Pat. Nos. 6,709,160; 4,902,144; 6,418,722 and 5,076,766, herein incorporated by reference.
- On some turbochargers, the oil inlet connection comprises a cylindrical fitting or adapter that is surrounded by an o-ring. The cylindrical fitting is fit into the inlet opening and held there by a clamp fixture that is bolted to the center housing. An oil delivery tube is pressed into the fitting and seal welded or brazed thereto.
- Resilient seal ring materials, such as elastomeric O-ring materials, have temperature limitations. For example, for VITON or fluoroelastomer material, according to the material specifications, the recommended high temperature limit is 400 degrees F. While the temperature around the O-ring is below this limit during normal operating conditions, it is possible that for some applications, for a short duration immediately after an engine is shut down the temperature around the o-ring could exceed this limit.
- According to an exemplary embodiment of the invention, one or more small holes are added to a turbocharger oil inlet tube fitting or adapter through a groove that holds a seal ring, such as an O-ring, so that the oil passing through the tube also reduces the temperature of the seal ring during engine operation by the oil quenching or flowing over the seal ring during operation. The holes are located closer to the bottom edge of the groove to maintain a leak free joint.
- The adapter should provide a reduced operating temperature for the seal ring for normal operating conditions and should prevent excessive temperature after shut down of the engine.
- Generally, the disclosed embodiment of the invention provides a fitting for attaching one conduit to another conduit. The fitting includes a body having a cylindrical sidewall with a central through-channel and an annular groove on an outside thereof for holding a seal ring, such as an O-ring. The sidewall has at least one radial hole connecting the central channel and the groove. The at least one radial hole can comprise a plurality of radial holes, the holes spaced apart around a circumference of the cylindrical body. The radial holes each can have a diameter of between ¼ and ⅓ of a width of the groove taken along an axial direction of the cylindrical sidewall.
- The embodiment is particularly suited to connecting an oil feed tube to a bearing housing of a turbocharger.
- Numerous other advantages and features of the present invention will be become readily apparent from the following detailed description of the invention and the embodiments thereof, from the claims and from the accompanying drawings.
-
FIG. 1 is a front elevation view, taken in section, of a turbocharger incorporating a lubrication tube fitting in accordance with an exemplary embodiment of the invention; -
FIG. 2 is a fragmentary perspective view of a lubrication tube assembly taken fromFIG. 1 ; -
FIG. 3 is a side view of the lubrication tube assembly ofFIG. 2 , removed from the turbocharger, with an o-ring removed to show underlying features; -
FIG. 4 is a side view of a lubrication tube fitting taken fromFIG. 3 ; and -
FIG. 5 is a sectional view taken generally along line 5-5 ofFIG. 4 with the o-ring added. - While this invention is susceptible of embodiment in many different forms, there are shown in the drawings, and will be described herein in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiments illustrated.
- A
turbocharger assembly 20 is shown generally inFIG. 1 . The assembly includes aturbine housing 22, acompressor housing 24, and a bearing orcenter housing 26 disposed between the turbine and compressor housings. - A
turbine wheel 30 is fixed on ashaft 32 with theturbine wheel 30 surrounded by theturbine housing 22 and theshaft 32 extending through thebearing housing 26 and into thecompressor housing 24. Acompressor wheel 36 is mounted on theshaft 32 in thecompressor housing 24. - The bearing
housing 26 has acentral bore 40 that includes bearinglands shaft 32 and the turbine and compressor wheels, a pair ofbearings 50, 52 are received in thebearing lands - In order to lubricate the bearing system described above, a lubricant, which is normally engine crankcase lubricating oil, is introduced under pressure through a
lubricant inlet port 54 formed in the bearinghousing 26. Theinlet port 54 is a simple straight bore in thehousing 26 that communicates with thecentral bore 40 in the bearing housing. - From the
inlet port 54, lubricant migrates axially outwardly along theshaft 32 in both axial directions in the space between theshaft 32 and the central bore 40 toward thejournal bearings 50, 52. When the lubricant reaches thejournal bearings 50, 52, it is constrained to flow through a plurality of flow paths around the journal bearings and into a pair ofoil collection spaces oil collection sump 60 where it is returned to the engine crankcase in a conventional manner. - As shown in
FIGS. 1-5 , aninlet tube fitting 70 is fit into theinlet port 54 and sealed against an inside wall of the port by a seal ring, such as an O-ring 76. Theinlet tube fitting 70 is fixed into theport 54 by a separate retaining clamp 78 that has acollar end portion 80 with ahole 82 that receives thetube fitting 70. The collar end portion closely surrounds asocket end portion 86 and presses down against ashoulder 84 of the tube fitting 70 when ananchor leg 88 of the clamp 78 is fastened to thecenter housing 26 by a machine screw orbolt 94. - The
inlet tube fitting 70 includes agroove 102 for receiving a seal ring, formed between abarrel portion 104 and ahead portion 106 of theinlet tube fitting 70. Thesocket end portion 86 includes a tube-receivingsocket 110 that is open into acentral channel 114 of the fitting 70. - As shown in
FIGS. 1-3 a conduit such as atube 118 is tightly pressed into the socket and brazed, welded or otherwise sealed all around a circularoutside interface 122 between thetube 118 and thesocket end portion 86. Lubricating oil flows through thetube 118, through thecentral channel 114 and into theport 54. The compressed O-ring 76 seals the oil flow within thecentral housing 26. - According to an exemplary embodiment of the invention, at least one
radial hole 128 is provided through thefitting 70 within thegroove 102. According to the illustrated embodiment, foursuch holes 128 are provided, rotationally spaced apart at 90 degrees about acentral axis 130 of the fitting 70. - According to the illustrated embodiment, the
holes 128 can have a diameter of about one third to one fourth of a width of thegroove 102, taken along theaxis 130. The number of holes and the diameter of the holes can be varied and are still encompassed by the invention. - From the foregoing, it will be observed that numerous variations and modifications may be effected without departing from the spirit and scope of the invention. It is to be understood that no limitation with respect to the specific apparatus illustrated herein is intended or should be inferred.
Claims (17)
1. An oil inlet fitting for a turbocharger, comprising:
a body having a cylindrical sidewall with a central through-channel and an annular groove on an outside thereof for holding an seal ring, the sidewall having at least one radial hole connecting the central channel and the groove.
2. The fitting according to claim 1 , wherein the at least one radial hole comprises four radial holes that are spaced apart around a circumference of the cylindrical sidewall and each radial hole connects the central channel and the groove.
3. The fitting according to claim 1 , comprising an O-ring fit into the groove.
4. The fitting according to claim 3 , wherein the at least one radial hole comprises four radial holes that are spaced apart around a circumference of the cylindrical sidewall and each radial hole connects the central channel and the groove.
5. The fitting according to claim 1 , wherein the radial hole has a diameter of between ¼ and ⅓ of a width of the groove taken along an axial direction of the cylindrical sidewall.
6. The fitting according to claim 5 , wherein the at least one radial hole comprises a plurality of radial holes that are spaced apart around a circumference of the cylindrical body and each radial hole connects the central channel and the groove.
7. The fitting according to claim 1 , wherein the at least one radial hole comprises a plurality of radial holes that are spaced apart around a circumference of the cylindrical body and each radial hole connects the central channel and the groove.
8. The fitting according to claim 7 , wherein each of the radial holes has a diameter of between ¼ and ⅓ of a width of the groove taken along an axial direction of the cylindrical sidewall.
9. The fitting according to claim 7 , wherein the body includes a socket at one end for attachment of a tube, the tube being open into the central channel.
10. The fitting according to claim 1 , wherein the body includes a socket at one end for attachment of a tube, the tube being open into the central channel.
11. A fitting for attaching one conduit to another conduit, comprising:
a body having cylindrical sidewall with a central through-channel and an annular groove on an outside thereof for holding an seal ring, the sidewall having at least one radial hole connecting the central channel and the groove.
12. The fitting according to claim 11 , wherein the at least one radial hole comprises four radial holes spaced apart around a circumference of the cylindrical sidewall.
13. The fitting according to claim 11 , comprising an O-ring fit into the groove.
14. The fitting according to claim 11 , wherein the radial hole has a diameter of between ¼ and ⅓ of a width of the groove taken along an axial direction of the cylindrical sidewall.
15. The fitting according to claim 14 , wherein the at least one radial hole comprises a plurality of radial holes that are spaced apart around a circumference of the cylindrical body and each radial hole connects the central channel and the groove.
16. The fitting according to claim 11 , wherein the at least one radial hole comprises a plurality of radial holes that are spaced apart around a circumference of the cylindrical body and each radial hole connects the central channel and the groove.
17. The fitting according to claim 16 , wherein each of the radial holes has a diameter of between ¼ and ⅓ of a width of the groove taken along an axial direction of the cylindrical sidewall.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/534,929 US20110031067A1 (en) | 2009-08-04 | 2009-08-04 | Turbocharger Lubrication Feed Adapter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/534,929 US20110031067A1 (en) | 2009-08-04 | 2009-08-04 | Turbocharger Lubrication Feed Adapter |
Publications (1)
Publication Number | Publication Date |
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US20110031067A1 true US20110031067A1 (en) | 2011-02-10 |
Family
ID=43533989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/534,929 Abandoned US20110031067A1 (en) | 2009-08-04 | 2009-08-04 | Turbocharger Lubrication Feed Adapter |
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US (1) | US20110031067A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111749737A (en) * | 2019-03-26 | 2020-10-09 | 现代自动车株式会社 | Coupling device of turbocharger and engine comprising same for coupling turbocharger |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4040504A (en) * | 1975-11-26 | 1977-08-09 | Smith Roy B | Drive shaft U-joint lubricator |
US20010017247A1 (en) * | 2000-02-18 | 2001-08-30 | Kazunori Machida | Rotary damper |
US20020196014A1 (en) * | 2001-06-21 | 2002-12-26 | Eiichiro Iwase | Rotation detection sensor and method for manufacturing a rotation detection sensor |
US7225897B2 (en) * | 2002-10-09 | 2007-06-05 | Honda Giken Kogyo Kabushiki Kaisha | Structure of receiving and delivering oil |
US7476090B2 (en) * | 2005-10-11 | 2009-01-13 | International Engine Intellectual Property Company, Llc | Vented turbocharger center housing and method |
US7980361B2 (en) * | 2006-08-11 | 2011-07-19 | Aichi Machine Industry Co., Ltd. | Lubricating system and lubricating method |
-
2009
- 2009-08-04 US US12/534,929 patent/US20110031067A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4040504A (en) * | 1975-11-26 | 1977-08-09 | Smith Roy B | Drive shaft U-joint lubricator |
US4113060A (en) * | 1975-11-26 | 1978-09-12 | Smith Roy B | Drive shaft "U" joint lubricator |
US20010017247A1 (en) * | 2000-02-18 | 2001-08-30 | Kazunori Machida | Rotary damper |
US20020196014A1 (en) * | 2001-06-21 | 2002-12-26 | Eiichiro Iwase | Rotation detection sensor and method for manufacturing a rotation detection sensor |
US6879151B2 (en) * | 2001-06-21 | 2005-04-12 | Aisin Seiki Kabushiki Kaisha | Rotation detection sensor and method for manufacturing a rotation detection sensor |
US7225897B2 (en) * | 2002-10-09 | 2007-06-05 | Honda Giken Kogyo Kabushiki Kaisha | Structure of receiving and delivering oil |
US7476090B2 (en) * | 2005-10-11 | 2009-01-13 | International Engine Intellectual Property Company, Llc | Vented turbocharger center housing and method |
US7980361B2 (en) * | 2006-08-11 | 2011-07-19 | Aichi Machine Industry Co., Ltd. | Lubricating system and lubricating method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111749737A (en) * | 2019-03-26 | 2020-10-09 | 现代自动车株式会社 | Coupling device of turbocharger and engine comprising same for coupling turbocharger |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMAPNY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DIAZ, EDUARDO;REEL/FRAME:023358/0087 Effective date: 20091005 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |