GB2117831A - A turbocharger having heat radiation members - Google Patents
A turbocharger having heat radiation members Download PDFInfo
- Publication number
- GB2117831A GB2117831A GB8307199A GB8307199A GB2117831A GB 2117831 A GB2117831 A GB 2117831A GB 8307199 A GB8307199 A GB 8307199A GB 8307199 A GB8307199 A GB 8307199A GB 2117831 A GB2117831 A GB 2117831A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- turbocharger
- heat radiation
- turbine
- bolts
- 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.)
- Withdrawn
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 19
- 230000000717 retained effect Effects 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000314 lubricant Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000003685 thermal hair damage Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
- F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
- F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
-
- 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
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- 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
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/243—Flange connections; Bolting arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/30—Retaining components in desired mutual position
- F05B2260/301—Retaining bolts or nuts
-
- 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
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
In a turbocharger employing a plurality of connecting bolts (42) for connecting the turbine wheel casing and the center casing, a plurality of heat radiation members (46) are intimately retained by the bolts (42). Each heat radiation member (46) having a sufficient heat radiation surface which is exposed to the open air. <IMAGE>
Description
SPECIFICATION
A turbocharger having simple heat radiation
members
The present invention relates in general to a turbocharger which supercharges the intake air by the force of the exhaust gas, and, more particularly to an improvement for effectively cooling the turbocharger.
In a turbocharger, the bearings of the turboshaft are supplied with a large quantity of cooling and lubricant oil to withstand the high speed
rotation (above 100,000 rpm) of the turbo-shaft.
Nevertheless, some of the turbochargers still have a weakness in effectively cooling the bearings because of the great heat generation at the turbine wheel casing. In these turbochargers, there is a high possibility of thermal damage of the bearings at the high load operation of them. One of the conventional turbochargers will be outlined hereinafter in order to clarify the above-mentioned thermal weakness.
According to the present invention, there is provided a turbocharger which has simple heat radiation members attached thereto.
According to the present invention, there is provided a turbocharger which comprises a turbine wheel casing in which a turbine wheel driven by a compressed exhaust gas is encased, a compressor casing in which a compressor wheel for producing a compressed air is encased, a center casing disposed between the turbine wheel casing and the compressor casing and supporting by means of bearings a turbo-shaft which carries at both its ends the turbine wheel and the compressor wheel respectively, means for supplying the bearings with cooling and lubricant oil under operation of the turbocharger, a plurality of bolts for tightly connecting the turbine wheel casing and the center casing, each bolt being in intimate contact with respective major portions of the turbine wheel casing and the center casing, a plurality of washers operatively associated with the bolts to assure the tight connection between the turbine wheel casing and the center casing, and a plurality of heat radiation members intimately contacting with and retained by the bolts, each heat radiation member having a considerable surface area which is exposed to the open air.
Objects and advantages of the present invention will become apparent from the following description when taken in conjunction with the accompanying drawings, in which:
Fig. 1 is an axially sectioned view of a conventional turbocharger to which the present invention is applicable;
Fig. 2 is a sectional view of a portion of the turbocharger to which a first embodiment of the present invention is practically applied;
Fig. 3 is a side view taken from the direction of the arrow Ill of Fig. 2;
Fig. 4 is a view similar to Fig. 3, but showing a second embodiment of the present invention; and
Fig. 5 is a view similar to Fig. 2, but showing a third embodiment of the present invention.
Prior to describing in detail the invention, a conventional turbocharger will be outlined, to which the present invention is applicable.
Referring to Fig. 1, there is shown the conventional turbocharger 1 0. The turbocharger 10 comprises generally a turbine wheel 12 and a compressor wheel 14 which are separately encased in a turbine wheel casing 1 6 and a compressor casing 1 8. The two wheels 12 and 14 are mounted on and rotate with a common turboshaft 20. The turbine side of the turbocharger 1 0 is mounted on the exhaust manifold outlet flange 22, and the compressor wheel side of it connects with the air intake manifold 24. A center casing 26 is sealingly disposed between the turbine wheel casing 1 6 and the compressor casing 1 8.
The turbo-shaft 20 is rotatably supported in the center casing 26 by means of floating bearings 28 and 30. The center casing 26 is formed with a lubricant oil inlet 32 and an oil passage 34 through which a suitable amount of cooling and lubricant oil is supplied to the floating bearings 28 and 30. The oil from the bearings 28 and 30 is led to an oil chamber 36 of the center casing 26 and then discharged therefrom through an oil outlet 38 for its recirculation. Designated by numeral 40 is a heat insulating member which is disposed between the inner side of the turbine wheel 12 and the turbine side surface of the center casing 26.
The connection of the turbine wheel casing 1 6 and the center casing 26 in this conventional turbocharger 10 is achieved by bolts 42 and a corresponding number of washers 44. For this connection, the center casing 26 is formed with a radially outwardly extending flange 26a, the turbine wheel casing 1 6 is formed with a stepped portion 1 6a at its one open side, and the heat insulator 40 is formed with a radially outwardly extending flange 40a at its open end.Upon connection, both flanges 26a and 40a of the center casing 26 and the heat insulator 40 are snugly received at their top portions in the stepped open portion 1 6a of the turbine wheel casing 16, and the bolts 42 are screwed to the turbine wheel casing 1 6 having the washers 44 interposed between the heads of the bolts 42 and the open side surface of the turbine wheel casing 16, as is seen from the drawing.
In such a bolt-using connection as mentioned hereinabove, however, there arises a difficulty that the bolts 42 and the washers 44 form a so-called heat transmitting passage which has a considerable heat conductivity thereby greatly promoting the heat transmission from the turbine wheel casing 1 6 to the center casing 26. Thus, in the worst case, it is possible that the bearings 28 and 30 may collapse, originating from the thermal deterioration thereof. In fact, just after stopping the operation of the turbocharger, the temperature in the center casing 26 rises greatly because in such a condition, the flow of the cooling (and lubricant) oil ceases.
Therefore an essential object of the present invention is to provide a measure which overcomes the above-mentioned difficulty.
Referring to Figs. 2 and 3, there is shown a first embodiment of the present invention, which is practically applied to a turbocharger of the type referred to hereinabove. The illustration of Fig. 2 is a view corresponding to the view of a portion enclosed by a broken line circle A of Fig. 1. In this first embodiment, bottomed cylindrical members 46 are employed as a heat radiator. As shown, each member has one end open and the other end closed by a centrally apertured wall 46a. The members 46 are constructed of a material having a high heat conductivity, such as a metal plate.As is understood from the drawings, each heat radiation member 46 is bolted at the apertured wall 46a to the open side surface of the turbine wheel casing 1 6 with a washer 44 interposed therebetween in such a manner that the cylindrical portion thereof is coaxially and spacedly disposed about the head of the bolt 42 with its open end facing the open air.
With the heat radiation members 46 intimately bolted to the turbine wheel casing 16, the heat generated in the turbine wheel casing 1 6 and transmitted to the members 46 through the shell of the casing 1 6 is effectively radiated therefrom to the open air. This means that the bearings 28 and 30 are protected from overheating. Thus, the above-mentioned undesirable thermal damage to the bearings 28 and 30 is eliminated or at least lessened.
Referring to Fig. 4, there is shown a second embodiment of the present invention, which is a slight modification of the first embodiment. The heat radiation member 47 of this second embodiment comprises a bottomed cylindrical member 48 having the same shape as the member 46 of the first embodiment, and a plurality of cooling fins 50 extending radially outwardly from the cylindrical member 48, as shown. Preferably, the fins 50 are integral with the cylindrical member 48. By the provision of the fins 50, the heat radiation surface area of the member 47 is greatly increased as compared with the member 46 of the first embodiment. Thus, much more effective cooling is expected from the second embodiment.
Referring to Fig. 5, there is shown a third embodiment of the present invention. In this embodiment, the heat radiation member 52 is just a flat plate, but constructed of a material having an excellent heat conductivity, such as copper, aluminium or the like. Preferably, each member 52 is fixed to the bolt 42 having its peripheral portion sufficiently exposed to the open air.
Claims (6)
1. A turbocharger comprising:
a turbine casing in which a turbine wheel driven by a compressed exhaust gas is encased;
a compressor casing in which a compressor wheel for producing a compressed air is encased;
a center casing disposed between said turbine casing and said compressor casing and supporting by means of bearings a turbo-shaft which carries at both its ends said turbine wheel and said compressor wheel respectively;
means for supplying said bearings with cooling and lubricant oil under operation of said turbocharger;
a plurality of bolts for tightly connecting said turbine casing and said center casing, each bolt being in intimate contact with respective major portions of said turbine casing and said center casing;
a plurality of washers operatively associated with said bolts to assure the tight connection between said turbine casing in said center casing; and
a plurality of heat radiation members intimately contacting with and retained by said bolts, each heat radiation member having a considerable surface area which is exposed to the open air.
2. A turbocharger as claimed in Claim 1, in which said heat radiation members are constructed of a material having a high heat conductivity.
3. A turbocharger as claimed in Claim 2, in which each heat radiation member comprises a bottomed cylindrical member, said member being connected to the corresponding bolt in such a manner that the cylindrical portion thereof is coaxially and spacedly disposed about the head portion of the bolt with its open end facing the open air.
4. A turbocharger as claimed in Claim 3, in which the bottomed cylindrical heat radiation member is formed at the cylindrical outer surface with a plurality of cooling fins.
5. A turbocharger as claimed in Claim 2, in which said heat radiation member is constructed of copper or aluminium.
6. A turbocharger as hereinbefore described with reference to Figs. 2 and 3, 4 or 5 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4648482U JPS58149537U (en) | 1982-03-31 | 1982-03-31 | Turbo gear with bearing protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8307199D0 GB8307199D0 (en) | 1983-04-20 |
| GB2117831A true GB2117831A (en) | 1983-10-19 |
Family
ID=12748477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8307199A Withdrawn GB2117831A (en) | 1982-03-31 | 1983-03-16 | A turbocharger having heat radiation members |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS58149537U (en) |
| DE (1) | DE3310576A1 (en) |
| GB (1) | GB2117831A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0556514A2 (en) * | 1991-12-23 | 1993-08-25 | General Electric Company | Combined heat shield and retainer for turbine assembly bolt |
| WO2003006883A1 (en) * | 2001-07-13 | 2003-01-23 | Siemens Aktiengesellschaft | Coolable segment for a turbomachinery and combustion turbine |
| DE102017003726B4 (en) | 2016-04-28 | 2022-07-14 | Mazda Motor Corporation | Turbocharged vehicle, turbocharged engine and method of cooling a turbocharger |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4784586A (en) * | 1986-10-16 | 1988-11-15 | Allied-Signal Inc. | Turbocharger having controlled heat transfer for bearing protection |
| JPH0192531A (en) * | 1987-10-05 | 1989-04-11 | Hitachi Ltd | Variable volume exhaust turbine supercharger |
| DE19652754A1 (en) * | 1996-12-18 | 1998-06-25 | Asea Brown Boveri | Exhaust gas supercharger |
-
1982
- 1982-03-31 JP JP4648482U patent/JPS58149537U/en active Pending
-
1983
- 1983-03-16 GB GB8307199A patent/GB2117831A/en not_active Withdrawn
- 1983-03-23 DE DE19833310576 patent/DE3310576A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0556514A2 (en) * | 1991-12-23 | 1993-08-25 | General Electric Company | Combined heat shield and retainer for turbine assembly bolt |
| EP0556514A3 (en) * | 1991-12-23 | 1993-10-13 | General Electric Company | Combined heat shield and retainer for turbine assembly bolt |
| EP0704601A1 (en) * | 1991-12-23 | 1996-04-03 | General Electric Company | Combined heat shield and retainer for turbine assembly bolt |
| WO2003006883A1 (en) * | 2001-07-13 | 2003-01-23 | Siemens Aktiengesellschaft | Coolable segment for a turbomachinery and combustion turbine |
| US7246993B2 (en) | 2001-07-13 | 2007-07-24 | Siemens Aktiengesellschaft | Coolable segment for a turbomachine and combustion turbine |
| DE102017003726B4 (en) | 2016-04-28 | 2022-07-14 | Mazda Motor Corporation | Turbocharged vehicle, turbocharged engine and method of cooling a turbocharger |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8307199D0 (en) | 1983-04-20 |
| DE3310576A1 (en) | 1983-10-13 |
| JPS58149537U (en) | 1983-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |