WO2019193711A1 - ウェストゲートバルブ - Google Patents
ウェストゲートバルブ Download PDFInfo
- Publication number
- WO2019193711A1 WO2019193711A1 PCT/JP2018/014596 JP2018014596W WO2019193711A1 WO 2019193711 A1 WO2019193711 A1 WO 2019193711A1 JP 2018014596 W JP2018014596 W JP 2018014596W WO 2019193711 A1 WO2019193711 A1 WO 2019193711A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mounting plate
- valve
- rotating shaft
- main body
- exhaust gas
- Prior art date
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Classifications
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- 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
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
- F02B37/186—Arrangements of actuators or linkage for bypass valves
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- 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
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
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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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/105—Final actuators by passing part of the fluid
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
- F16K1/2007—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member specially adapted operating means therefor
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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
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/21—Manufacture essentially without removing material by casting
-
- 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
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
- F05D2230/239—Inertia or friction welding
-
- 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
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/25—Manufacture essentially without removing material by forging
-
- 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
- F05D2260/60—Fluid transfer
- F05D2260/606—Bypassing the fluid
-
- 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
- the present invention relates to a wastegate valve that is provided in an exhaust gas flow path of a turbocharged engine by a turbocharger and adjusts an inflow amount of exhaust gas to a turbine by diverting a part of the exhaust gas.
- a wastegate valve that is offset from the valve body and extends in a direction substantially perpendicular to the central axis of the valve body from the mounting plate that supports the valve body, and is formed in a substantially L shape in plan view as a whole.
- Exhaust turbine superchargers are known to improve engine performance and reduce fuel consumption.
- the engine exhaust gas introduced from the exhaust gas inlet rotates the turbine impeller provided in the turbine housing and is then discharged from the exhaust gas outlet to the exhaust gas flow path. It is configured as follows.
- a waste gate valve 11 is provided in a bypass passage 10 extending between the exhaust gas inlet portion 3 and the exhaust gas outlet portion 8, for example, When the supercharging pressure exceeds the set value, the wastegate valve 11 is opened, and a part of the exhaust gas led to the turbine impeller 4 is led from the bypass passage 10 to the exhaust gas passage 9, thereby An excessive supply pressure is prevented.
- the wastegate valve 11 has a rotating shaft 13 extending from the mounting plate 17 that supports the valve body 12 in a direction that is offset with respect to the valve body 12 and substantially perpendicular to the central axis of the valve body 12. Is formed in a substantially L shape in plan view.
- the rotation shaft 13 of the wastegate valve 11 passes through the bypass flow path 10 and is guided to the outside of the turbine housing 1 and is rotated by the actuator 16.
- the valve body 12 is disposed so as to contact the valve seat surface 10a, and the valve body 12 is separated from the valve seat surface 10a by the rotation of the rotation shaft 13, and the valve 11 is opened.
- the wastegate valve 11 has a rotating shaft 13 fixed to the mounting plate 17 by arc welding, for example, and the valve body 12 is fixed to the mounting plate 17 via a mounting pin 23 and a washer 24 so as not to be pulled out. It is configured.
- the wastegate valve 11 is exposed to high-temperature exhaust gas, not only the valve body 12 but also all of the valve components such as the rotating shaft 13, the mounting plate 17, and the washer 24 are made of a heat-resistant alloy and have a heat-resistant temperature. The higher the alloy, the higher the price, and the higher the unit price of the valve 11.
- the mounting plate 17 is provided with a fitting hole 19 for inserting the rotating shaft 13 and is fitted.
- a weld bead is formed in the weld hole 21 provided in the wall where the joint hole 19 is formed.
- the mounting plate 17 is large because the fitting hole 19 and the welding hole 21 are provided. For this reason, first, in addition to the high cost of the valve 11, it leads to an increase in the total weight of the engine due to an increase in the weight of the valve 11. Second, the valve arrangement space provided in the exhaust gas flow path 9 (bypass flow path 10) in the turbine housing 1 is large, which is a limitation in designing the exhaust gas flow path 9 including the bypass flow path 10. .
- the present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to reduce the cost by downsizing the mounting plate by fixing the rotating shaft body to the mounting plate by solid phase bonding. It is an object of the present invention to provide a wastegate valve that can achieve weight reduction and relaxation of restrictions on the design of an exhaust gas passage having a bypass passage.
- the invention according to claim 1 A waist that is offset from the valve body and extends in a direction substantially orthogonal to the central axis of the valve body from a mounting plate that supports the valve body, and is formed in a substantially L shape in plan view.
- the rotating shaft is constituted by a rotating shaft main body solid-phase bonded to a side portion of the mounting plate.
- a rotating shaft extending from the mounting plate can be configured by solid-phase joining (for example, friction welding or resistance welding) one end of the rotating shaft main body to the side portion of the mounting plate.
- Solid-phase bonding can be applied not only to fixing between similar metals, but also to fixing between different types of metals, because the processing time is short, the quality (bonding strength) is constant, and there are few burrs generated along the bonding surface. The post-processing for removing the is easy.
- Solid phase bonding refers to a bonding method in which a bonding member is heated and softened in a solid phase (solid) state without melting, and further pressurized and bonded.
- solid phase bonding includes friction welding. And resistance welding included.
- friction welding is a method in which members to be joined are polished together at a high speed, and the members are softened by frictional heat generated at the same time, and at the same time, pressure is applied to join using diffusion of atoms generated between the joining surfaces. It is.
- resistance welding is a method of joining members to be joined together, sandwiching the places to be joined with electrodes, applying a predetermined pressure to flow an electric current, and joining the joint surfaces softened by Joule heat generated in the contact resistance of the joint portions. Is the method.
- the mounting plate since the rotating shaft is arc-welded to the mounting plate, the mounting plate requires a rotating shaft fitting hole and a welding hole for a weld bead, and the mounting plate becomes larger accordingly.
- the rotating shaft main body may be solid-phase bonded to the side of the mounting plate, and the mounting plate made of an expensive heat-resistant metal can be made compact. For this reason, first, the cost of the wastegate valve is reduced and the total weight is also reduced. Second, the wastegate valve is disposed in the vicinity of the valve seat surface of the exhaust gas flow path (bypass flow path) in the turbine housing, and the bypass flow path is provided by reducing the valve arrangement space. Restrictions on designing the exhaust gas flow path are eased.
- the rotating shaft supported by the through hole provided in the turbine housing has a heat transmitted from the mounting plate. As much heat is radiated to the turbine housing, heat resistance as required for the valve body and the mounting plate is not required.
- the cost of the wastegate valve can be reduced by making the pivot shaft body cheaper by configuring the pivot shaft body with a metal having lower heat resistance than the valve body and mounting plate made of heat resistant metal. Further reduction.
- the invention according to claim 2 is the wastegate valve according to claim 1,
- the rotating shaft is composed of the rotating shaft main body and a ridge portion having substantially the same diameter as the rotating shaft main body protruding from the side portion of the mounting plate.
- a protruding shaft formed on the side of the mounting plate and a rotating shaft main body solid-phase bonded to the protruding strip cooperate with each other, and a rotating shaft extending from the mounting plate, that is, a turbine housing.
- the rotating shaft supported by the through-hole provided in is comprised.
- the rotating shaft extending from the mounting plate is not required to have the heat resistance required for the valve body and mounting plate as much as the heat transmitted from the mounting plate is dissipated to the turbine housing.
- the temperature (high temperature) is close to the temperature (high temperature) of the mounting plate.
- the region close to the mounting plate on the rotating shaft is composed of a protruding strip formed on the side of the mounting plate, that is, the same heat-resistant metal as the metal constituting the mounting plate.
- the heat resistance in the region close to the mounting plate of the rotating shaft does not become a problem.
- the region close to the mounting plate on the rotating shaft dissipates heat transferred from the mounting plate to the turbine housing.
- the area close to the mounting plate on the rotating shaft (projection formed on the side of the mounting plate) is not as high as the area close to the mounting plate on the rotating shaft (formed on the side of the mounting plate).
- the required heat resistance is not required. Therefore, even if the rotating shaft main body is made of a metal having a lower heat resistance than the heat resistant metal constituting the valve body and the mounting plate, there is a risk that the mechanical strength of the rotating shaft main body is lowered due to the influence of heat. In other words, there is no problem with the heat resistance of the rotating shaft body.
- the temperature of the exhaust gas flowing through the exhaust gas flow path differs, but if the temperature of the exhaust gas is high, make the valve body and the mounting plate heat resistant.
- the rotating shaft main body must be made of a metal having a certain level of heat resistance.
- the protruding length of the ridge formed on the mounting plate made of a heat-resistant metal is increased, the influence of heat on the rotating shaft body made of a metal having a lower heat resistance than the metal constituting the mounting plate. Can be suppressed. That is, by adjusting the protruding length of the ridge portion, various heat-resistant metals constituting the rotating shaft main body can be selected.
- the protruding length of the ridge formed on the mounting plate made of heat-resistant metal is reduced (the length of the rotating shaft body made of metal having low heat resistance is reduced).
- the protruding length of the ridge formed on the mounting plate made of heat-resistant metal is reduced (the length of the rotating shaft body made of metal having low heat resistance is reduced).
- a heat-resistant metal constituting the dynamic shaft main body can be appropriately selected.
- the invention according to claim 3 is the wastegate valve according to claim 1 or 2, characterized in that the rotating shaft main body is constituted by a hollow pipe.
- the invention according to claim 4 is the wastegate valve according to claim 3,
- the rotating shaft main body penetrates a turbine housing of an exhaust turbine supercharger, and a hollow portion of the rotating shaft main body opens to the outside of the turbine housing.
- the invention according to claim 5 is the wastegate valve according to any one of claims 1 to 4,
- the valve body is fixed to the mounting plate formed by forging by caulking so as not to come out via a mounting pin and a washer.
- the wastegate valve To manufacture the wastegate valve, it is attached through the forging process of the mounting plate, the solid phase joining (for example, friction welding) process of the rotating shaft body, the deburring process, and the through hole forming process to the mounting plate.
- a valve intermediate structure having a rotation shaft extending from the side portion of the plate and having an overall L-shape in plan view is manufactured.
- a valve element is attached to a mounting plate (through hole) of the valve intermediate structure. The step of crimping is performed.
- a deburring process after the solid-phase bonding (for example, friction welding) process is performed by forming a recess (thin wall) corresponding to the through hole for fixing the valve body by caulking.
- the step of forming a through hole in the mounting plate that is subsequently performed the operation of penetrating the recess (thin wall portion) formed in the mounting plate is simplified.
- the invention according to claim 6 is the wastegate valve according to any one of claims 1 to 4,
- the valve body and the mounting plate are integrally formed by forging or lost wax casting.
- valve body and the mounting plate are integrally formed by forging or lost wax casting, and the number of parts constituting the wastegate valve is small accordingly.
- the rotating shaft body is fixed to the mounting plate by solid phase bonding
- the conventional waist is fixed to the mounting plate by arc welding.
- a wastegate valve that can reduce the cost of the wastegate valve by reducing the mounting plate in comparison with the gate valve, reduce the weight, and relax the restrictions on the exhaust gas flow path design with the bypass flow path is provided. .
- FIG. 4 is a sectional view showing an exhaust gas passage and a bypass passage (a sectional view taken along line IV-IV shown in FIG. 2).
- FIG. 4 is a sectional view showing an exhaust gas passage and a bypass passage (a sectional view taken along line IV-IV shown in FIG. 2).
- FIG. 4 is a front perspective view of the wastegate valve concerning a 1st embodiment.
- FIG. 1 to 4 show an embodiment of an exhaust turbine supercharger having a wastegate valve according to the present invention, and the exhaust turbine supercharger has the same structure as that of the prior patent document 1 (Japanese Patent Laid-Open No. 2013-2431). It is. Specifically, FIG. 1 is a side view of the exhaust turbine supercharger, FIG. 2 is a front view of the exhaust turbine supercharger, FIG. 3 is a rear view of the exhaust turbine supercharger, and FIG. FIG. 4 is a cross-sectional view (a cross-sectional view taken along line IV-IV shown in FIG. 2) showing a gas flow path and a bypass flow path. 5 to 10 are views showing the waste gate valve 50 according to the first embodiment.
- reference numeral 1 denotes a turbine housing of an exhaust turbine supercharger 100.
- exhaust gas from an exhaust manifold of an engine is sent to an exhaust gas inlet 3 (see FIG. 4) of a turbine scroll unit 2.
- the turbine impeller 4 (see FIG. 4) is rotated by the exhaust gas supplied to the turbine scroll unit 2.
- a compressor impeller (not shown) coaxial with the turbine impeller 4 is provided in the compressor scroll 6 of the compressor housing 5, and the air taken in from the air intake port 7a at the shaft center by the rotation of the compressor impeller. , And the compressed air is supplied to the engine from the compressed air outlet 7b to supercharge the engine.
- the exhaust gas that has driven the turbine impeller 4 is discharged from the exhaust gas outlet portion 8 to the exhaust gas passage 9. Further, in order to control the supercharging pressure of the compressed air supplied to the engine, a bypass passage 10 for bypassing the exhaust gas is provided between the exhaust gas inlet 3 and the exhaust gas outlet 8. .
- annular valve seat surface 10a is formed in the peripheral part of the circular opening part 10b to the exhaust gas flow path 9 of the bypass flow path 10, and the vicinity downstream of the opening part 10b (valve seat surface 10a) is formed.
- the waste gate valve 50 moves in a direction in which the valve body 56 is separated from the valve seat surface 10a (downward in FIG. 4), and a part of the exhaust gas is turbine.
- the impeller 4 is bypassed and sent from the bypass passage 10 to the exhaust gas passage 9.
- the wastegate valve 50 includes a rotating shaft 58 that extends from the mounting plate 52 that supports the valve body 56 in an approximately rectangular shape when viewed from the front side and is offset from the valve body 56.
- the rotating shaft 58 is supported by a circular pipe-shaped bearing 13 ⁇ / b> A penetrating the turbine housing 1 forming wall, and the other end 58 a is exposed to the outside of the turbine housing 1.
- the bearing 13A is press-fitted and fixed in the through hole 1a of the turbine housing 1 forming wall.
- the rotating lever 14 is fixed to the outer end portion (other end portion) 58 a of the rotating shaft 58 in a crank shape.
- the tip of the advance / retreat rod 16 a of the actuator 16 fixed to the compressor housing 5 is connected via a drive pin 15.
- the advance / retreat rod 16 a moves back and forth, so that the rotation lever 14 swings in the direction of arrow B in FIG. 1 and is fixed to the rotation lever 14.
- the rotating shaft 58 is rotated in the circumferential direction with respect to the bearing 13A. That is, by driving the actuator 16, as shown in FIG. 5C, the waste gate valve 50 swings (rotates) around the bearing 13A and opens and closes the valve body 56 with respect to the opening 10b (valve seat surface 10a). Perform the action.
- minute gaps S1 and S2 are provided between the bearing 13A, the mounting plate 52 of the valve 50, and the turning lever 14, and the wastegate valve.
- An axial backlash exists between the shaft 50 and the bearing 13A, but the sealing surface of the valve body 56 with respect to the annular valve seat surface 10a provided in the exhaust gas passage 9 (bypass passage 10). 56a1 is formed large and can absorb this play (see FIG. 4).
- the actuator 16 is constituted by, for example, a diaphragm drive device by air drive.
- the wastegate valve 50 is opened and a part of the exhaust gas is passed through the turbine impeller 4. Bypassing and exhausting from the exhaust gas inlet 3 to the exhaust gas passage 9 (see FIG. 4).
- the wastegate valve 50 is joined (fixed) to a side of the mounting plate 52 by friction welding and a mounting plate 52 that is substantially rectangular in front view that supports the valve body 56, and is offset with respect to the valve body 56.
- a rotation shaft 58 extending in a direction orthogonal to the central axis O of 56 is provided, and the whole is formed in a substantially L shape in plan view (see FIGS. 5 and 8A).
- valve body 56 is opened and closed with respect to the valve seat surface 10 a (opening portion 10 b) by rotating around the rotation center axis L.
- a disk-shaped bulging portion 52 a orthogonal to the rotating shaft 58 is formed on the side of the mounting plate 52 where the rotating shaft 58 extends, so A cylindrical rotating shaft 58 extends from the end face of the protruding portion 52a.
- one end surface of the rotating shaft main body 58 ⁇ / b> A is rubbed against the distal end surface of the protrusion 53 (see FIGS. 6 and 7) slightly protruding from the end surface of the bulging portion 52 a by a friction welding process described later. It is configured by being joined and integrated by pressure welding. 5, 8, and 10 indicate a joint (joint surface) between the members 53 and 58 ⁇ / b> A.
- the side opposite to the bulging portion 52a formation side of the mounting plate 52 is formed in a flat plate shape extending downward, and the upper edge portion 52b thereof is shown by a one-dot difference line in FIG.
- the upper edge right-angled corner portion is formed in a “cone-like shape” in which a right-angled triangle is cut out so that the protruding amount into the exhaust gas passage 9 of the mounting plate 52 is reduced.
- the bypass flow path 10 is an exhaust gas flow from the exhaust gas outlet portion 8 toward the front of the turbine housing 1 when the exhaust turbine supercharger is viewed from the front. Adjacent to the lower right side of the gas flow path 9, it is provided in parallel with the exhaust gas flow path 9, and communicates with the exhaust gas flow path 9 through an opening 10 b in which an annular valve seat surface 10 a is formed. ing.
- the waste gate valve 50 has a sealing surface 56a1 of the valve body 56 in close contact with the valve seat surface 10a, and a horizontal direction in which the rotation shaft 58 is substantially orthogonal to the bypass flow path 10 (left and right direction in FIGS. 2 and 4).
- the side opposite to the bulging portion 52 a formation side of the mounting plate 52 protrudes into the exhaust gas passage 9.
- the upper edge 52b of the mounting plate 52 protruding into the exhaust gas passage 9 is formed in a “cone shape” in which the upper edge right-angled corner is cut out in a right triangle.
- the amount of protrusion of the mounting plate 52 into the exhaust gas flow path 9 is small, and the cross-sectional area of the exhaust gas flow path 9 is not narrowed by the mounting plate 52 of the wastegate valve 50.
- a through hole 54 is provided in the disk-shaped lower region 52 c of the mounting plate 52, and the valve body 56 is caulked and fixed to the through hole 54 via the mounting pin 56 c and the washer 57. .
- a through shaft 56b that can pass through the through hole 54 of the mounting plate 52 protrudes from the back side of the flat seal surface 56a1, and the through hole 57a of the washer 57 is formed at the tip of the through shaft 56b.
- a mounting pin 56c that can be fitted to the projection is formed to protrude.
- the valve body 56 is attached to the through hole 54 of the attachment plate 52 via the washer 57 by caulking the tip of the attachment pin 56c to form the crimp portion 56c ′.
- a tapered chamfered portion 57b (see FIG. 9) is formed in the peripheral portion of the through hole 57a of the washer 57 on the side from which the mounting pin 56c protrudes, and the contact area between the crimped portion 56c ′ and the washer 57 is increased.
- the retaining strength of the valve body 56 is increased.
- the waste gate valve 50 is disposed in the vicinity of the valve seat surface 10 a provided in the exhaust gas passage 9 (bypass passage 10) in the turbine housing 1 and exposed to high-temperature exhaust gas. It is. Depending on the specifications of the exhaust turbine supercharger, the temperature of the exhaust gas in the exhaust gas passage 9 (bypass passage 10) may be 1000 ° C. or more. In this embodiment, the exhaust turbine supercharger The waste gate valve 50 is composed of a high Ni alloy NCF751 (heat-resistant temperature 950 degrees) so that it can meet the specifications (maximum exhaust gas temperature 900 degrees). That is, the mounting plate 52, the valve body 56, the washer 57, and the rotating shaft 58 are all made of a high Ni alloy NCF751.
- the side of the mounting plate 52 is subjected to a forging process of the mounting plate 52, a friction welding process of the rotary shaft main body 58 ⁇ / b> A, a deburring process, and a through hole 54 forming process to the mounting plate 52.
- the valve intermediate structure U (not shown) having a rotation shaft 58 extending from the whole and formed in a substantially L shape in plan view is manufactured.
- the mounting plate 52 (through the valve intermediate structure U) is penetrated. A step of caulking and fixing the valve body 56 in the hole 54) is performed.
- the protruding ridges 53 are formed on the side portions of the mounting plate 52. However, since the protruding length of the protruding ridges 53 is small, the forming of the protruding ridges 53 in the forging process is easy. It is.
- the burrs after the friction welding process are formed.
- the through-hole forming process to the mounting plate 52 performed subsequent to the removing process is simplified. That is, since the thickness of the bottom surface of the concave portion (thin portion) 54b formed in the mounting plate 52 is small, the operation of forming the through hole 54 for opening the concave portion (thin portion) 54b is simplified.
- the friction welding process for joining the rotary shaft main body 58A to the side portion of the mounting plate 52 is performed by using a well-known (well-known) friction welding device and a protruding strip portion 53 that is formed to protrude from the side portion of the mounting plate 52.
- the rotating shaft main body 58A is arranged so as to face the same axis in the horizontal direction, and the mounting plate 52 is moved in a direction approaching the rotating shaft main body 58A with respect to the rotating shaft main body 58A rotating at a predetermined speed. Then, by pressing the contact surface between the convex strip 53 on the mounting plate 52 side and the rotary shaft main body 58A, the rotary shaft main body 58A is joined to the convex strip 53 on the mounting plate 52 side by friction welding ( Fixed).
- burrs are generated on the outer periphery of the joint portion (joint surface) 59 between the projection 53 on the mounting plate 52 side and the rotary shaft main body 58A, the burrs are removed in the deburring step after the friction welding step. .
- the recess (thin wall portion) 54b corresponding to the through hole 54 provided in the mounting plate 52 is drilled. Note that in the deburring step, drilling may be performed.
- valve intermediate structure U in which the rotating shaft 58 extends from the side portion of the mounting plate 52 and is formed in a substantially L shape in plan view is manufactured.
- a step of caulking and fixing the valve body 56 to the mounting plate 52 (through hole 54) of the valve intermediate structure U via the mounting pin 56c and the washer 57 is shown in FIGS.
- the wastegate valve 50 is completed.
- the pivot shaft 58 of the wastegate valve 50 of the present embodiment is joined (fixed) to the convex portion 53 formed slightly projecting on the side of the mounting plate 52 and the convex portion 53 by friction welding.
- the rotating shaft main body 58A is characterized in that there is almost no variation in the joining strength of the joining portion (joining surface) 59 in joining by friction welding. For this reason, the joining strength of the rotating shaft main body 58A of the manufactured wastegate valve 50 is always constant, and the quality of the wastegate valve 50 can be assured accordingly.
- the rotary shaft main body 58A is joined (fixed) to the ridges 53 of the mounting plate 52 by friction welding, so that the expensive mounting plate 52 made of high Ni alloy NCF751 is compact. Can be For this reason, first, the cost of the wastegate valve 50 can be reduced and the total weight can also be reduced. Second, the wastegate valve 50 is disposed in the vicinity of the valve seat surface 10a provided in the exhaust gas flow path 9 (bypass flow path 10) in the turbine housing 1, but the arrangement space of the valve 50 is reduced. Thus, restrictions on designing the exhaust gas passage 9 including the bypass passage 10 are alleviated.
- FIG. 12 shows the wastegate valve 50A according to the second embodiment and is a view showing a state in which the wastegate valve 50A is disposed in the turbine housing 1.
- the pivot shaft 58 of the wastegate valve 50 ⁇ / b> A that is, the pivot shaft 58 extending to the side of the mounting plate 52 is provided on the convex strip portion 53 ⁇ / b> A and the convex strip portion 53. It is comprised by the rotating shaft main body 58B of the same diameter as the protruding item
- the protruding ridge 53A protruding from the side of the mounting plate 52 and the rotary shaft main body 58B joined to the protruding ridge 53A cooperate to support the bearing 13A provided in the turbine housing 1.
- the rotating shaft 58 is configured.
- the protruding line portion 53A has a protruding length L1 larger than the protruding line portion 53 formed on the mounting plate 52 of the above-described wastegate valve 50 of the first embodiment.
- valve body 56 and the mounting plate 52 that are directly exposed to the exhaust gas are made of high Ni alloy NCF751 (heat-resistant temperature 950 degrees), while the rotating shaft main body 58B that is a region far from the mounting plate 52 is made of stainless steel. (Heat resistant temperature 850 degrees).
- the rotating shaft 58 extending from the mounting plate 52 does not require heat resistance as required for the valve body 56 and the mounting plate 52 because the heat transmitted from the mounting plate 52 is radiated to the turbine housing 1.
- the heat of the exhaust gas is transmitted to a temperature (high temperature) close to the temperature (high temperature) of the mounting plate 52.
- the area close to the mounting plate 52 in the rotating shaft 58 is constituted by a protruding strip portion 53A that protrudes from the side of the mounting plate 52, that is, a high Ni alloy NCF751 (heat resistant) having excellent heat resistance. Temperature 950 degrees).
- the heat of the exhaust gas transmitted to the rotary shaft main body 58A which is a region far from the mounting plate 52 in the rotary shaft 58, is reduced by the amount of heat radiated from the ridges 53A to the turbine housing 1 on the way.
- the unit price of the wastegate valve 50 is reduced by configuring the rotary shaft main body 58A with stainless steel (heat resistant temperature 850 degrees) cheaper than the high Ni alloy NCF751.
- FIG. 13 shows a wastegate valve 50B according to the third embodiment, and shows a state in which the wastegate valve 50B is disposed in the turbine housing 1.
- the rotary shaft 58 of the waste gate valve 50B is joined to the protruding strip 53 formed on the side of the mounting plate 52 made of high Ni alloy NCF751 (heat-resistant temperature 950 degrees) and the protruding strip 53 by friction welding.
- the rotary shaft main body 58C has a hollow pipe shape made of (fixed) stainless steel (heat-resistant temperature 850 degrees).
- the rotating shaft 58 is supported by a bearing 13 ⁇ / b> A provided in the turbine housing 1, and the hollow portion of the rotating shaft main body 58 ⁇ / b> C that penetrates the turbine housing 1 and constitutes the rotating shaft 58 is outside the turbine housing 1. It is open.
- the rotating shaft main body 58B dissipates heat transmitted from the mounting plate 52 to the turbine housing 1 via the bearing 13A, and further dissipates heat to the convection of the air generated in the hollow portion.
- the main body 58B is not required to have the heat resistance required for the valve body 56 and the mounting plate 52.
- the unit price of the wastegate valve 50B is reduced by configuring the rotary shaft main body 58C with stainless steel (heat resistant temperature 850 degrees) that is cheaper than the high Ni alloy NCF751.
- FIG. 14 and 15 show a wastegate valve 50C according to a fourth embodiment of the present invention
- FIG. 14 is a front view of the wastegate valve 50C
- FIG. 15 is a front exploded perspective view of the wastegate valve 50C. .
- valve body 56A and the mounting plate 52A are integrally formed in a cylindrical shape, and are offset from the side of the mounting plate 52A that supports the valve body 56A with respect to the valve body 56A.
- a rotation shaft 58 extends in a direction orthogonal to the central axis O of 56A, and the whole is formed in a substantially L shape in plan view.
- the rotation shaft 58 extending from the columnar mounting plate 52A includes a protruding strip portion 53B protruding from the side of the mounting plate 52A and a rotating shaft joined (fixed) to the protruding strip portion 53B by friction welding. It is composed of a main body 58D.
- the ridge 53B and the rotary shaft main body 58D are formed to have the same diameter.
- the sealing surface 56a1 of the valve body 56A is formed as a continuous curved surface that can come into contact with the annular valve seat surface 10a provided on the exhaust gas passage 9 (bypass passage 10) side.
- a recess 56A1 for reducing the weight of the valve body 56A is provided on the back side of the seal surface 56a1 of the valve body 56A.
- valve body 56A with the mounting plate 52A and the rotating shaft main body 58D constituting the waste gate valve 50C are both made of a high Ni alloy 713c (heat-resistant temperature 1050 degrees), and the exhaust gas passage 9 (bypass).
- the exhaust gas temperature in the flow path 10) is configured to be applicable to the specifications of the exhaust turbine supercharger in which the temperature is 1000 degrees or more.
- the rotation shaft main body 58D is located far from the mounting plate 52A by the length corresponding to the protruding length of the ridge 53B, it is composed of a high Ni alloy NCF751 (heat resistant temperature 950 degrees) which is lower in heat resistance than the high Ni alloy 713c. May be. Further, the rotation shaft main body 58D may be formed of a hollow pipe (see FIG. 13) to improve the heat dissipation of the rotation shaft 58 (rotation shaft main body 58D).
- the number of parts constituting the wastegate valve 50C is small, and the construction of the wastegate valve 50C is simpler.
- valve body 56A with the mounting plate 52A is limited to lost wax casting. ,Inevitable.
- the wastegate valve 10C can be constituted by a high Ni alloy NCF751 (heat resistant temperature of 950 degrees) which is a heat resistant alloy.
- NCF751 heat resistant temperature of 950 degrees
- the forging process of the valve body 56A with the mounting plate 52A, the friction welding process of the rotating shaft main body 58D, and the deburring process are performed, thereby reducing the waste gate valve 50C.
- the process of forming the through hole 54 in the mounting plate 52 and the process of fixing the valve body 56 to the mounting plate 52 are unnecessary, and the number of manufacturing processes is reduced accordingly.
- the wastegate valve 50C can be manufactured in a short time.
- valve body 56 is caulked and fixed in the through hole 54 provided in the mounting plate 52 so as not to come out via the mounting pin 56c and the washer 57.
- the valve body 56A and the mounting plate 52A are integrally formed by forging or lost wax casting, and the wastegate valve 50C is configured as much. The number of parts is small.
- the rotation shaft main body is joined (fixed) to the side portion of the mounting plate by friction welding, so that the rotation shaft is moved from the side portion of the mounting plate.
- friction welding it is comprised so that it may extend, the structure to which a rotating shaft main body is joined (fixed) to the side part of a mounting plate by solid phase joining other than friction welding, for example, resistance welding may be sufficient.
- the resistance welding process which joins a rotating shaft main body to the side part of a mounting plate uses the well-known (well-known) resistance welding apparatus, for example, with the protruding item
- the rotating shaft main body 58A is disposed so as to abut on the same axis in the horizontal direction.
- the rotary shaft main body 58A is joined (fixed) to the portion 53 by resistance welding.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
Description
弁体を支持する取付板から、前記弁体に対しオフセットしかつ前記弁体の中心軸と略直交する方向に回動軸が延出して、全体が平面視略L字形状に形成されたウェストゲートバルブにおいて、
前記回動軸は、前記取付板の側部に固相接合された回動軸本体で構成されたことを特徴とする。
前記回動軸は、前記回動軸本体と、前記取付板の側部に突出形成された前記回動軸本体と略同一径の凸条部で構成されたことを特徴とする。
前記回動軸本体は、排気タービン過給機のタービンハウジングを貫通して、該回動軸本体の中空部が前記タービンハウジング外に開口することを特徴とする。
前記弁体は、鍛造により成形された前記取付板に、取付ピンと座金を介して抜け出さないようにカシメ固定されたことを特徴とする。
前記弁体と前記取付板は、鍛造またはロストワックス鋳造により一体的に成形されたことを特徴とする。
9 排気ガス流路
10 バイパス流路
10a 弁座面
10b バイパス流路の排気ガス流路への開口部
13A 軸受け
14 回動レバー
50,50A,50B,50C ウェストゲートバルブ
52,52A 取付板
52b 取付板のとさか状上縁部
52A1 取付板の傾斜上側縁部
52c 円盤状下方領域
53,53A 凸条部
54 貫通孔
56 弁体
56A 取付板付き弁体
O 弁体の中心軸
56a 弁体のシール面
56c 取付ピン
57 座金
58 回動軸
58A,58B,58C,58D 回動軸本体
59 接合面
Claims (6)
- 弁体を支持する取付板から、前記弁体に対しオフセットしかつ前記弁体の中心軸と略直交する方向に回動軸が延出して、全体が平面視略L字形状に形成されたウェストゲートバルブにおいて、
前記回動軸は、前記取付板の側部に固相接合された回動軸本体で構成されたことを特徴とするウェストゲートバルブ。 - 前記回動軸は、前記回動軸本体と、前記取付板の側部に突出形成された前記回動軸本体と略同一径の凸条部で構成されたことを特徴とする請求項1に記載のウェストゲートバルブ。
- 前記回動軸本体は、中空パイプで構成されたことを特徴とする請求項1または2に記載のウェストゲートバルブ。
- 前記回動軸本体は、排気タービン過給機のタービンハウジングを貫通して、該回動軸本体の中空部が前記タービンハウジング外に開口することを特徴とする請求項3に記載のウェストゲートバルブ。
- 前記弁体は、鍛造により成形された前記取付板に、取付ピンと座金を介して抜け出さないようにカシメ固定されたことを特徴とする請求項1~4のいずれかに記載のウェストゲートバルブ。
- 前記弁体と前記取付板は、鍛造またはロストワックス鋳造により一体的に成形されたことを特徴とする請求項1~4のいずれかに記載のウェストゲートバルブ。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2018/014596 WO2019193711A1 (ja) | 2018-04-05 | 2018-04-05 | ウェストゲートバルブ |
JP2020512181A JP7034260B2 (ja) | 2018-04-05 | 2018-04-05 | ウェストゲートバルブ |
EP18913608.8A EP3779143A4 (en) | 2018-04-05 | 2018-04-05 | WASTE SLIDING VALVE |
KR1020207020481A KR20200138162A (ko) | 2018-04-05 | 2018-04-05 | 웨이스트 게이트 밸브 |
CN201880089819.6A CN111902617A (zh) | 2018-04-05 | 2018-04-05 | 排气旁通阀 |
US17/061,506 US20210017900A1 (en) | 2018-04-05 | 2020-10-01 | Wastegate Valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2018/014596 WO2019193711A1 (ja) | 2018-04-05 | 2018-04-05 | ウェストゲートバルブ |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/061,506 Continuation-In-Part US20210017900A1 (en) | 2018-04-05 | 2020-10-01 | Wastegate Valve |
Publications (1)
Publication Number | Publication Date |
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WO2019193711A1 true WO2019193711A1 (ja) | 2019-10-10 |
Family
ID=68100595
Family Applications (1)
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PCT/JP2018/014596 WO2019193711A1 (ja) | 2018-04-05 | 2018-04-05 | ウェストゲートバルブ |
Country Status (6)
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US (1) | US20210017900A1 (ja) |
EP (1) | EP3779143A4 (ja) |
JP (1) | JP7034260B2 (ja) |
KR (1) | KR20200138162A (ja) |
CN (1) | CN111902617A (ja) |
WO (1) | WO2019193711A1 (ja) |
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US11982222B2 (en) * | 2020-08-17 | 2024-05-14 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Wastegate valve device, turbine, and turbocharger |
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2018
- 2018-04-05 KR KR1020207020481A patent/KR20200138162A/ko not_active Application Discontinuation
- 2018-04-05 WO PCT/JP2018/014596 patent/WO2019193711A1/ja active Application Filing
- 2018-04-05 JP JP2020512181A patent/JP7034260B2/ja active Active
- 2018-04-05 EP EP18913608.8A patent/EP3779143A4/en not_active Withdrawn
- 2018-04-05 CN CN201880089819.6A patent/CN111902617A/zh active Pending
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2020
- 2020-10-01 US US17/061,506 patent/US20210017900A1/en not_active Abandoned
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JP2008055486A (ja) * | 2006-09-01 | 2008-03-13 | Nippon Light Metal Co Ltd | 摩擦圧接部品および摩擦圧接方法 |
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Also Published As
Publication number | Publication date |
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EP3779143A1 (en) | 2021-02-17 |
JP7034260B2 (ja) | 2022-03-11 |
EP3779143A4 (en) | 2021-12-01 |
KR20200138162A (ko) | 2020-12-09 |
CN111902617A (zh) | 2020-11-06 |
JPWO2019193711A1 (ja) | 2021-04-22 |
US20210017900A1 (en) | 2021-01-21 |
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