WO2023085178A1 - タービンおよび過給機 - Google Patents
タービンおよび過給機 Download PDFInfo
- Publication number
- WO2023085178A1 WO2023085178A1 PCT/JP2022/040920 JP2022040920W WO2023085178A1 WO 2023085178 A1 WO2023085178 A1 WO 2023085178A1 JP 2022040920 W JP2022040920 W JP 2022040920W WO 2023085178 A1 WO2023085178 A1 WO 2023085178A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- turbine
- turbine wheel
- tongue
- tongue portion
- wheel
- Prior art date
Links
- 210000002105 tongue Anatomy 0.000 description 108
- 238000005192 partition Methods 0.000 description 12
- 230000004308 accommodation Effects 0.000 description 11
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
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- 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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
- F01D1/023—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines the working-fluid being divided into several separate flows ; several separate fluid flows being united in a single flow; the machine or engine having provision for two or more different possible fluid flow paths
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- 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
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/026—Scrolls for radial machines or engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
- F02B37/025—Multiple scrolls or multiple gas passages guiding the gas to the pump drive
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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
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/12—Kind or type gaseous, i.e. compressible
-
- 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
- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
-
- 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
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
-
- 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
- F05D2250/00—Geometry
- F05D2250/30—Arrangement of components
- F05D2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
- F05D2250/314—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being inclined in relation to each other
-
- 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
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- Patent Document 1 As a turbine provided in a supercharger or the like, two turbine scroll passages wound radially outward with respect to a turbine wheel are arranged in the axial direction of the turbine wheel. There is a turbine lined up in the A tongue is provided at a position facing the downstream end of each turbine scroll passage. Such turbines are also called twin-scroll turbines.
- An object of the present disclosure is to provide a turbine and a supercharger that can reduce blade vibration of a turbine wheel.
- the turbine of the present disclosure includes a shaft, a turbine wheel attached to one side of the shaft, a housing part for housing the turbine wheel, and a A first turbine scroll passage that is wound and communicates with the housing portion, and a first turbine scroll passage that is wound radially outwardly with respect to the turbine wheel, communicates with the housing portion, and is arranged on one side of the first turbine scroll passage.
- a second turbine scroll passage a first tongue portion provided at a position facing the downstream end of the first turbine scroll passage and inclined toward one side in the circumferential direction of the turbine wheel as it progresses toward one side; a second tongue portion provided at a position facing the downstream end of the turbine scroll flow path and inclined toward the other side in the circumferential direction of the turbine wheel as it progresses toward the one side.
- the first tongue may be inclined in the direction of rotation of the turbine wheel as it proceeds to one side, and the second tongue may be inclined in the direction opposite to the direction of rotation as it proceeds to one side.
- the first tongue may be inclined in a direction opposite to the direction of rotation of the turbine wheel as it proceeds to one side, and the second tongue may be inclined in the direction of rotation as it proceeds to one side.
- the inclination angle of the first tongue portion and the second tongue portion with respect to the axial direction of the turbine wheel when viewed in the radial direction of the turbine wheel is an angle obtained by dividing 360° by the number of blades of the turbine wheel. It may be below.
- the turbocharger of the present disclosure includes the above turbine.
- blade vibration of a turbine wheel can be reduced.
- FIG. 1 is a schematic cross-sectional view showing a supercharger according to an embodiment of the present disclosure.
- FIG. 2 is a cross-sectional view taken along line AA of FIG.
- FIG. 3 is a cross-sectional view along BB in FIG.
- FIG. 4 is a cross-sectional view taken along line CC of FIGS. 2 and 3.
- FIG. 5 is a cross-sectional view taken along line DD of FIG.
- FIG. 6 is a DD cross-sectional view of a turbine according to a modification.
- FIG. 1 is a schematic cross-sectional view showing a turbocharger TC according to an embodiment of the present disclosure.
- the direction of arrow L shown in FIG. 1 is assumed to be the left side of turbocharger TC.
- the direction of the arrow R shown in FIG. 1 will be described as the right side of the supercharger TC.
- the supercharger TC includes a supercharger body 1 .
- the turbocharger main body 1 includes a bearing housing 3 , a turbine housing 5 and a compressor housing 7 .
- the turbine housing 5 is connected to the left side of the bearing housing 3 by a fastening mechanism 9.
- the fastening mechanism 9 is, for example, a G coupling.
- the compressor housing 7 is connected to the right side of the bearing housing 3 by fastening bolts 11 .
- the supercharger TC comprises a turbine T and a centrifugal compressor C.
- Turbine T includes bearing housing 3 and turbine housing 5 .
- Turbine T is a twin-scroll turbine.
- Centrifugal compressor C includes bearing housing 3 and compressor housing 7 .
- a bearing hole 3 a is formed in the bearing housing 3 .
- the bearing hole 3a penetrates the turbocharger TC in the left-right direction.
- a bearing 13 is provided in the bearing hole 3a.
- FIG. 1 shows a full floating bearing as an example of the bearing 13 .
- bearing 13 may also be a semi-floating bearing or other bearing such as a rolling bearing.
- the bearing 13 rotatably supports the shaft 15 .
- a turbine wheel 17 is provided at the left end of the shaft 15 .
- the turbine wheel 17 is mounted on one side, the left side, of the shaft 15 .
- the turbine wheel 17 is rotatably housed in the turbine housing 5 .
- a compressor impeller 19 is provided at the right end of the shaft 15 .
- a compressor impeller 19 is rotatably housed in the compressor housing 7 .
- the axial direction of the supercharger TC coincides with the axial direction of the shaft 15 , the axial direction of the turbine wheel 17 , and the axial direction of the compressor impeller 19 .
- the radial direction of the supercharger TC coincides with the radial direction of the shaft 15 , the radial direction of the turbine wheel 17 , and the radial direction of the compressor impeller 19 .
- the circumferential direction of the supercharger TC coincides with the circumferential direction of the shaft 15 , the turbine wheel 17 , and the compressor impeller 19 .
- An intake port 21 is formed in the compressor housing 7 .
- the intake port 21 opens on the right side of the supercharger TC.
- the intake port 21 is connected to an air cleaner (not shown).
- a diffuser flow path 23 is formed by the facing surfaces of the bearing housing 3 and the compressor housing 7 .
- the diffuser flow path 23 pressurizes the air.
- the diffuser flow path 23 is formed in an annular shape.
- the diffuser flow path 23 communicates with the intake port 21 via the compressor impeller 19 on the radially inner side.
- a compressor scroll flow path 25 is also formed in the compressor housing 7 .
- the compressor scroll flow path 25 is formed in an annular shape.
- the compressor scroll channel 25 is located radially outside the diffuser channel 23, for example.
- the compressor scroll channel 25 communicates with the intake port of the engine (not shown) and the diffuser channel 23 .
- intake air is pressurized and accelerated while flowing between the blades of the compressor impeller 19 .
- the pressurized and accelerated air is pressurized in the diffuser passage 23 and the compressor scroll passage 25 .
- the pressurized air is directed to the intake of the engine.
- the turbine housing 5 is formed with a discharge passage 27 , a housing portion 29 , a first turbine scroll passage 31 and a second turbine scroll passage 33 .
- the discharge channel 27 opens on the left side of the supercharger TC.
- the discharge flow path 27 is connected to an exhaust gas purification device (not shown).
- the discharge channel 27 communicates with the housing portion 29 .
- the discharge channel 27 continues axially with respect to the accommodating portion 29 .
- the accommodation portion 29 accommodates the turbine wheel 17 .
- the first turbine scroll passage 31 and the second turbine scroll passage 33 are provided radially outside the accommodating portion 29 .
- the first turbine scroll passage 31 and the second turbine scroll passage 33 are wound radially outward with respect to the turbine wheel 17 .
- the first turbine scroll passage 31 and the second turbine scroll passage 33 communicate with the accommodation portion 29 .
- the second turbine scroll passage 33 is arranged on the left side of the first turbine scroll passage 31 in the axial direction (that is, one side of the shaft 15 to which the turbine impeller 17 is attached).
- a partition plate 35 is formed between the first turbine scroll passage 31 and the second turbine scroll passage 33 .
- the partition plate 35 partitions the first turbine scroll passage 31 and the second turbine scroll passage 33 in the axial direction.
- the first turbine scroll passage 31 and the second turbine scroll passage 33 communicate with an exhaust manifold of the engine (not shown).
- Exhaust gas discharged from an exhaust manifold of an engine is sent to the housing portion 29 via the first turbine scroll passage 31 and the second turbine scroll passage 33 and then guided to the discharge passage 27 .
- the exhaust gas guided to the discharge passage 27 rotates the turbine wheel 17 in the course of circulation.
- the rotational force of the turbine wheel 17 is transmitted to the compressor impeller 19 via the shaft 15. As the compressor impeller 19 rotates, the air is pressurized as described above. Air is thus directed to the intake of the engine.
- FIG. 2 is a cross-sectional view along line AA in FIG. AA cross section is a cross section perpendicular to the axial direction of the shaft 15 and passing through the first turbine scroll passage 31 .
- FIG. 2 only the outer circumference of the turbine wheel 17 is indicated by a circle.
- the turbine housing 5 is formed with a first exhaust inlet 37 .
- the first exhaust inlet 37 opens to the outside of the turbine housing 5 .
- Exhaust gas discharged from an exhaust manifold of an engine (not shown) is introduced into the first exhaust gas introduction port 37 .
- a first exhaust introduction passage 39 is formed between the first exhaust introduction port 37 and the first turbine scroll passage 31 .
- the first exhaust introduction passage 39 connects the first exhaust introduction port 37 and the first turbine scroll passage 31 .
- the first exhaust introduction path 39 is formed linearly, for example.
- the first exhaust introduction passage 39 guides the exhaust gas introduced from the first exhaust introduction port 37 to the first turbine scroll passage 31 .
- the first turbine scroll passage 31 communicates with the housing portion 29 via the first communication portion 41 .
- the first communicating portion 41 is formed in an annular shape over the entire circumference of the accommodating portion 29 .
- the first turbine scroll passage 31 guides the exhaust gas introduced from the first exhaust introduction passage 39 to the accommodation portion 29 via the first communication portion 41 .
- the first turbine scroll passage 31 is wound so as to approach the turbine wheel 17 as it advances in the rotational direction RD of the turbine wheel 17 .
- the radial width of the first turbine scroll passage 31 decreases from upstream to downstream.
- a first tongue portion 43 is provided at a position facing the downstream end of the first turbine scroll passage 31 .
- the first tongue portion 43 separates the downstream portion and the upstream portion of the first turbine scroll passage 31 .
- FIG. 3 is a cross-sectional view along BB in FIG.
- a BB cross section is a cross section perpendicular to the axial direction of the shaft 15 and passing through the second turbine scroll passage 33 .
- FIG. 3 as in FIG. 2, only the outer circumference of the turbine wheel 17 is indicated by a circle.
- the turbine housing 5 is formed with a second exhaust inlet 45 .
- the second exhaust inlet 45 opens to the outside of the turbine housing 5 .
- the second exhaust inlet 45 is arranged on the axial left side of the first exhaust inlet 37 (that is, one side of the shaft 15 to which the turbine wheel 17 is attached).
- the first exhaust introduction port 37 and the second exhaust introduction port 45 are partitioned in the axial direction by the partition plate 35 . Exhaust gas discharged from an exhaust manifold of an engine (not shown) is introduced into the second exhaust inlet 45 .
- a second exhaust introduction passage 47 is formed between the second exhaust introduction port 45 and the second turbine scroll passage 33 .
- the second exhaust introduction passage 47 connects the second exhaust introduction port 45 and the second turbine scroll passage 33 .
- the second exhaust introduction path 47 is formed linearly, for example.
- the second exhaust introduction path 47 is arranged on the left side of the first exhaust introduction path 39 in the axial direction (that is, one side of the shaft 15 to which the turbine wheel 17 is attached).
- the first exhaust introduction path 39 and the second exhaust introduction path 47 are partitioned in the axial direction by the partition plate 35 .
- the second exhaust introduction passage 47 guides the exhaust gas introduced from the second exhaust introduction port 45 to the second turbine scroll passage 33 .
- the second turbine scroll passage 33 communicates with the housing portion 29 via the second communication portion 49 .
- the second communicating portion 49 is formed in an annular shape over the entire circumference of the accommodating portion 29 .
- the second communicating portion 49 is arranged on the left side of the first communicating portion 41 in the axial direction (that is, one side of the shaft 15 to which the turbine wheel 17 is attached).
- the first communicating portion 41 and the second communicating portion 49 are partitioned in the axial direction by the partition plate 35 .
- the second turbine scroll passage 33 guides the exhaust gas introduced from the second exhaust introduction passage 47 to the accommodation portion 29 via the second communication portion 49 .
- the second turbine scroll passage 33 is wound so as to approach the turbine wheel 17 as it advances in the rotational direction RD of the turbine wheel 17 .
- the radial width of the second turbine scroll passage 33 decreases from upstream to downstream.
- a second tongue portion 51 is provided at a position facing the downstream end of the second turbine scroll passage 33 .
- the second tongue portion 51 separates the downstream portion and the upstream portion of the second turbine scroll passage 33 .
- the circumferential position of the first tongue portion 43 and the circumferential position of the second tongue portion 51 coincide with each other.
- FIG. 4 is a CC cross-sectional view of FIGS. 2 and 3.
- FIG. A CC cross section is a cross section that passes through the first tongue portion 43 and the second tongue portion 51 and includes the rotation axis of the turbine wheel 17 .
- the turbine wheel 17 has a plurality of blade bodies 17a.
- the plurality of wing bodies 17a are provided at regular intervals in the circumferential direction.
- Each blade 17 a is formed to extend radially outward from the outer peripheral surface of a hub that extends on the rotating shaft of the turbine wheel 17 .
- the leading edge LE of the blade 17a extends parallel to the rotation axis of the turbine wheel 17.
- the leading edge LE may be slanted radially outward as it progresses axially to the left (that is, the side of the shaft 15 to which the turbine wheel 17 is attached).
- the leading edge LE is a portion of the outer peripheral edge of the blade body 17a that faces the first turbine scroll passage 31 and the second turbine scroll passage 33 . Exhaust gas flows from the first turbine scroll passage 31 and the second turbine scroll passage 33 into the accommodation portion 29 through the vicinity of the leading edge LE.
- the first tongue portion 43 and the second tongue portion 51 are arranged radially outside the leading edge LE of the blade body 17 a of the turbine wheel 17 .
- the portions of the first tongue 43 and the second tongue 51 facing the turbine wheel 17 extend parallel to the rotation axis of the turbine wheel 17 . That is, the portions of the first tongue portion 43 and the second tongue portion 51 facing the turbine wheel 17 extend parallel to the leading edge LE.
- tongue portions when the first tongue portion 43 and the second tongue portion 51 are not particularly distinguished, they are simply referred to as tongue portions.
- the shape of the tongue portion is devised in order to reduce blade vibration of the turbine wheel 17 .
- FIG. 5 is a cross-sectional view taken along line DD of FIG.
- a DD cross section is a cross section along the circumferential direction of the turbine wheel 17 passing through the first tongue portion 43 and the second tongue portion 51 .
- a DD cross section is a cross-sectional view when the first tongue portion 43 and the second tongue portion 51 are seen in the radial direction from the turbine wheel 17 side.
- the DD cross-sectional view of FIG. 4 is shown with the arrow L direction as the upward direction and the arrow R direction as the downward direction.
- the first tongue portion 43 is inclined in the rotational direction RD of the turbine wheel 17 as it advances in the arrow L direction. That is, the first tongue portion 43 is inclined in the rotational direction RD as it progresses toward the one side of the shaft 15 to which the turbine wheel 17 is attached.
- the second tongue portion 51 is inclined in a direction opposite to the rotation direction RD of the turbine wheel 17 as it advances in the arrow L direction. That is, the second tongue portion 51 is inclined in a direction opposite to the rotation direction RD as it progresses toward the one side of the shaft 15 to which the turbine wheel 17 is attached.
- the first tongue portion 43 is inclined toward one side in the circumferential direction of the turbine wheel 17 as it progresses toward the one side of the shaft 15 to which the turbine wheel 17 is attached.
- the tongue portion 51 is inclined toward the other side in the circumferential direction of the turbine wheel 17 as it progresses toward the one side. Therefore, when each tongue is viewed in the radial direction from the turbine wheel 17 side, each tongue is circumferentially inclined with respect to the axial direction of the turbine wheel 17 .
- a part of the tongue portion sequentially faces the blade body 17a for each tongue portion.
- first tongue portion 43 first, the portion on the arrow R direction side of the first tongue portion 43 faces the wing body 17a. After that, the portion of the first tongue portion 43 that faces the wing body 17a transitions in the arrow L direction.
- second tongue portion 51 first, the portion on the arrow L direction side of the second tongue portion 51 faces the wing body 17a. After that, the portion of the second tongue portion 51 that faces the wing body 17a transitions in the arrow R direction. Therefore, for each tongue, the blade 17a of the turbine wheel 17 is prevented from facing the entire tongue at the same time.
- the direction in which the first tongue 43 is inclined with respect to the axial direction of the turbine wheel 17 and the direction in which the second tongue 51 is inclined is the opposite direction.
- gas flows from the vicinity of the first tongue portion 43 into the accommodation portion 29 of the turbine wheel 17 and gas flows from the vicinity of the second tongue portion 51 into the accommodation portion 29 of the turbine wheel 17. are symmetrical with respect to the central plane of the partition plate 35 .
- the center plane of the partition plate 35 is a plane that passes through the center of the partition plate 35 in the thickness direction and is perpendicular to the axial direction.
- the first tongue portion 43 and the second tongue portion 51 do not necessarily have to be plane-symmetrical with respect to the central plane of the partition plate 35 . Even if the first tongue portion 43 and the second tongue portion 51 are not plane-symmetrical with respect to the central plane of the partition plate 35, the flow of gas flowing into the accommodation portion 29 of the turbine wheel 17 from the vicinity of the first tongue portion 43 is reduced. Since the axial component and the axial component of the flow of gas flowing into the housing portion 29 of the turbine wheel 17 from the vicinity of the second tongue portion 51 at least partially cancel each other, the blade vibration is reduced.
- the first tongue 43 is inclined in the rotational direction RD as it progresses toward the one side of the shaft 15 to which the turbine wheel 17 is attached, and the second tongue 51 progresses toward the one side. It is inclined in the direction opposite to the direction of rotation RD as it increases.
- the gas flowing into the housing portion 29 of the turbine wheel 17 from the vicinity of the first tongue portion 43 is axially guided leftward by the first tongue portion 43 .
- the gas flowing from the vicinity of the second tongue portion 51 into the housing portion 29 of the turbine wheel 17 is axially guided by the second tongue portion 51 to the opposite side to the left side in the axial direction. Therefore, the gas that flows into the accommodation portion 29 of the turbine wheel 17 from the vicinity of each tongue flows toward the center of the blade body 17a in the axial direction. Thereby, the aerodynamic performance is improved.
- the inclination angles of the first tongue portion 43 and the second tongue portion 51 with respect to the axial direction when viewed in the radial direction of the turbine wheel 17 will be described. 5, the inclination angle ⁇ 1 of the first tongue portion 43 with respect to the axial direction when viewed in the radial direction of the turbine wheel 17 and the axial direction of the second tongue portion 51 when viewed in the radial direction of the turbine wheel 17 are shown. and the tilt angle .theta.2 with respect to .
- the tilt angle ⁇ 1 and the tilt angle ⁇ 2 are approximately the same.
- the inclination angles ⁇ 1 and ⁇ 2 are excessively large, the flow field in the housing portion 29 of the turbine wheel 17 deviates greatly from the assumed state, and the aerodynamic performance may deteriorate.
- the inclination angles ⁇ 1 and ⁇ 2 are preferably equal to or less than an angle obtained by dividing 360° by the number of blade bodies 17a of the turbine wheel 17, for example.
- the greater the number of wing bodies 17a the shorter the time difference between the timings at which adjacent wing bodies 17a face the tongue.
- the inclination angles ⁇ 1 and ⁇ 2 can be decreased as the number of blade bodies 17a increases.
- the time required for each wing body 17a to pass through the tongue portion relative to the above time difference is suppressed from becoming excessively long. Therefore, it is suppressed that the flow field in the accommodating portion 29 of the turbine wheel 17 deviates greatly from the assumed state, and the deterioration of the aerodynamic performance is suppressed.
- the inclination angles ⁇ 1 and ⁇ 2 do not have to be less than or equal to the angle obtained by dividing 360° by the number of blade bodies 17a of the turbine wheel 17. Moreover, the inclination angle ⁇ 1 and the inclination angle ⁇ 2 may be different from each other.
- each tongue when viewed in the circumferential direction of the turbine wheel 17, each tongue is not radially inclined with respect to the axial direction of the turbine wheel 17. However, when viewed in the circumferential direction of the turbine wheel 17 , at least one of the first tongue portion 43 and the second tongue portion 51 may be radially inclined with respect to the axial direction of the turbine wheel 17 .
- FIG. 6 is a DD sectional view of the turbine T1 according to the modification.
- the inclination directions of the first tongue portion 43 and the second tongue portion 51 are different from those of the turbine T described above.
- the first tongue portion 43 inclines in the direction opposite to the rotation direction RD of the turbine wheel 17 as it advances in the arrow L direction. That is, the first tongue portion 43 is inclined in a direction opposite to the rotation direction RD as it progresses toward the one side of the shaft 15 to which the turbine wheel 17 is attached.
- the second tongue portion 51 is inclined in the rotation direction RD of the turbine wheel 17 as it advances in the arrow L direction. That is, the second tongue portion 51 is inclined in the rotational direction RD as it progresses toward the one side of the shaft 15 to which the turbine wheel 17 is attached.
- the first tongue 43 extends toward the one side of the shaft 15 to which the turbine wheel 17 is attached.
- the second tongue portion 51 is inclined toward the other side in the circumferential direction of the turbine wheel 17 as it progresses toward the one side. Therefore, similar to the turbine T described above, the effect of reducing blade vibration is exhibited.
- the first tongue 43 is inclined in the direction opposite to the rotational direction RD as it progresses toward the one side of the shaft 15 where the turbine wheel 17 is attached, and the second tongue 51 It inclines in the rotation direction RD as it advances to the side.
- the portions of the first turbine scroll passage 31 and the second turbine scroll passage 33 adjacent to the respective tongues on the upstream side (the left side of the first tongue 43 and the second tongue 51 in FIG. 6) ), an obtuse angle is formed between the surface of the inner surface of each turbine scroll flow path facing the partition plate 35 and each tongue. Therefore, on the upstream side of each turbine scroll passage, which is close to the engine exhaust and hits by gas with higher energy, the occurrence of cracks at the boundary portion between each tongue and each turbine scroll passage is suppressed.
- the inclination angles ⁇ 1 and ⁇ 2 may be equal to or less than the angle obtained by dividing 360° by the number of the blade bodies 17a of the turbine wheel 17, and may not be equal to or less than this angle. may Also, the inclination angles ⁇ 1 and ⁇ 2 may be substantially the same or may be different from each other. Further, when viewed in the circumferential direction of the turbine wheel 17, each tongue does not have to be radially inclined with respect to the axial direction of the turbine wheel 17, and the first tongue 43 and the second tongue 51 may be radially inclined with respect to the axial direction of the turbine wheel 17 .
- the turbine T may be mounted on a device other than the turbocharger TC, such as a generator.
- the present disclosure can reduce blade vibration in turbine wheels, e.g. We can contribute to 9. "Develop resilient infrastructure, promote sustainable industrialization, and expand innovation.”
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
Description
θ2 傾斜角
Claims (12)
- シャフトと、
前記シャフトの一方側に取り付けられたタービン翼車と、
前記タービン翼車を収容する収容部と、
前記タービン翼車に対して径方向外側に巻き回され、前記収容部と連通する第1タービンスクロール流路と、
前記タービン翼車に対して径方向外側に巻き回され、前記収容部と連通し、前記第1タービンスクロール流路に対して前記一方側に並ぶ第2タービンスクロール流路と、
前記第1タービンスクロール流路の下流端に面する位置に設けられ、前記一方側に進むにつれて前記タービン翼車の周方向の一側に傾斜する第1舌部と、
前記第2タービンスクロール流路の下流端に面する位置に設けられ、前記一方側に進むにつれて前記タービン翼車の周方向の他側に傾斜する第2舌部と、
を備える、
タービン。 - 前記第1舌部は、前記一方側に進むにつれて前記タービン翼車の回転方向に傾斜し、
前記第2舌部は、前記一方側に進むにつれて前記回転方向と逆方向に傾斜する、
請求項1に記載のタービン。 - 前記第1舌部は、前記一方側に進むにつれて前記タービン翼車の回転方向と逆方向に傾斜し、
前記第2舌部は、前記一方側に進むにつれて前記回転方向に傾斜する、
請求項1に記載のタービン。 - 前記タービン翼車の径方向に見た場合における前記第1舌部および前記第2舌部の前記タービン翼車の軸方向に対する傾斜角は、360°を前記タービン翼車の翼体の枚数で除算して得られる角度以下である、
請求項1に記載のタービン。 - 前記タービン翼車の径方向に見た場合における前記第1舌部および前記第2舌部の前記タービン翼車の軸方向に対する傾斜角は、360°を前記タービン翼車の翼体の枚数で除算して得られる角度以下である、
請求項2に記載のタービン。 - 前記タービン翼車の径方向に見た場合における前記第1舌部および前記第2舌部の前記タービン翼車の軸方向に対する傾斜角は、360°を前記タービン翼車の翼体の枚数で除算して得られる角度以下である、
請求項3に記載のタービン。 - 請求項1に記載のタービンを備える、
過給機。 - 請求項2に記載のタービンを備える、
過給機。 - 請求項3に記載のタービンを備える、
過給機。 - 請求項4に記載のタービンを備える、
過給機。 - 請求項5に記載のタービンを備える、
過給機。 - 請求項6に記載のタービンを備える、
過給機。
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DE112022003370.3T DE112022003370T5 (de) | 2021-11-09 | 2022-11-01 | Turbine und Turbolader |
CN202280051926.6A CN117751232A (zh) | 2021-11-09 | 2022-11-01 | 涡轮以及增压器 |
JP2023559586A JPWO2023085178A1 (ja) | 2021-11-09 | 2022-11-01 | |
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Citations (4)
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JPS55132329U (ja) * | 1979-03-13 | 1980-09-19 | ||
WO2013105316A1 (ja) * | 2012-01-11 | 2013-07-18 | 三菱重工業株式会社 | タービンハウジングのスクロール構造 |
WO2015092373A1 (en) * | 2013-12-16 | 2015-06-25 | Cummins Ltd | Turbine housing |
WO2020003649A1 (ja) * | 2018-06-29 | 2020-01-02 | 株式会社Ihi | タービンおよび過給機 |
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JP4548237B2 (ja) | 2005-06-17 | 2010-09-22 | トヨタ自動車株式会社 | ターボチャージャのツインスクロールタービンハウジング |
DE102015205998A1 (de) * | 2015-04-02 | 2016-10-06 | Ford Global Technologies, Llc | Aufgeladene Brennkraftmaschine mit zweiflutiger Turbine und gruppierten Zylindern |
JP6931797B2 (ja) | 2017-06-01 | 2021-09-08 | パナソニックIpマネジメント株式会社 | 制御システム、制御方法、および制御プログラム |
JP7259397B2 (ja) * | 2019-02-25 | 2023-04-18 | 株式会社Ihi | タービン |
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JPS55132329U (ja) * | 1979-03-13 | 1980-09-19 | ||
WO2013105316A1 (ja) * | 2012-01-11 | 2013-07-18 | 三菱重工業株式会社 | タービンハウジングのスクロール構造 |
WO2015092373A1 (en) * | 2013-12-16 | 2015-06-25 | Cummins Ltd | Turbine housing |
WO2020003649A1 (ja) * | 2018-06-29 | 2020-01-02 | 株式会社Ihi | タービンおよび過給機 |
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US20240200456A1 (en) | 2024-06-20 |
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