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WO2023095266A1 - Soupape de commutation de circuit d'écoulement - Google Patents

Soupape de commutation de circuit d'écoulement Download PDF

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Publication number
WO2023095266A1
WO2023095266A1 PCT/JP2021/043276 JP2021043276W WO2023095266A1 WO 2023095266 A1 WO2023095266 A1 WO 2023095266A1 JP 2021043276 W JP2021043276 W JP 2021043276W WO 2023095266 A1 WO2023095266 A1 WO 2023095266A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow path
passage
valve
valve body
outlet passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/043276
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English (en)
Japanese (ja)
Inventor
真史 岩崎
智昭 福岡
努 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikki Co Ltd
Original Assignee
Nikki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nikki Co Ltd filed Critical Nikki Co Ltd
Priority to PCT/JP2021/043276 priority Critical patent/WO2023095266A1/fr
Publication of WO2023095266A1 publication Critical patent/WO2023095266A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F16K1/22—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 crossing the valve member, e.g. butterfly valves
    • 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 channel switching valve that is arranged at a branch point in a fluid channel to switch the channel.
  • a channel switching valve may be used for switching the flow of the fluid when a channel branching into a first channel and a second channel is formed.
  • a channel switching valve may be used for switching the flow of the fluid when a channel branching into a first channel and a second channel is formed.
  • Patent Document 1 discloses an exhaust pipe switching valve that switches an exhaust flow path by a single butterfly valve arranged in one of the passages after branching of the exhaust pipe.
  • Patent Document 2 discloses an exhaust pipe switching valve that switches the exhaust flow path by one rotary valve arranged at a branch point of the exhaust pipe.
  • the conventional exhaust pipe switching valve using the butterfly valve is installed on one side of the passage after branching, the exhaust passage switches between one side release and both side release, but the rotary valve described above is used. According to the used exhaust pipe switching valve, since it is possible to select and switch one of the exhaust flow paths, it is possible to further enhance the effect of switching the exhaust flow path.
  • Patent Document 3 discloses an exhaust pipe switching valve that switches the exhaust flow path by one butterfly valve arranged at the branch point of the exhaust pipe.
  • the exhaust pipe switching valve described in Patent Document 3 uses a valve body in which an elastic member having a protruding bead portion is arranged along the outer peripheral portion of a plate, and has a thick three-dimensional shape. is used, the structure is similar to that of the above-mentioned rotary valve, so there is concern about the same problem.
  • An object of the present invention is to provide a flow path switching valve that is arranged at a branch point in a fluid flow path to switch the flow path, and that has a simple and strong structure and excellent operability.
  • a flow path switching valve disposed at a branch point of a first flow path and a second flow path branching in a fluid flow path and capable of switching the flow path to either the first flow path or the second flow path.
  • a T-shaped passage is formed inside, a branch pipe side of the passage is an inlet passage, one of the main pipe sides of the passage is communicated with the first passage, a first outlet passage, and the other of the main pipe side of the passage is connected.
  • a second outlet passage that communicates with the second flow passage, and the axis of the inlet passage and the axes of the first outlet passage and the second outlet passage intersect each other at right angles to each of the axes.
  • valve stem axially supported through the body in a direction; a plate-like elliptical valve disc fixed to the valve stem in the passage; an actuator rotating the valve stem; consists of
  • the valve body is substantially straight when viewed from the axis of the first outlet passage or the second outlet passage in a state where the flow path is switched to the first flow path or the second flow path. It is characterized by being circular.
  • the valve body is elliptical in plan view, and has a substantially perfect circular shape when viewed from the direction of the first outlet passage or the second outlet passage when closed. It is possible to switch the channel between the channel and the second channel, and to reduce the inclination angle of the valve body when the valve is closed.
  • the valve disc fixed to the valve stem with the axis of the valve stem eccentrically rotated. Due to the eccentricity of the shaft, the flow path can be switched between the first flow path and the second flow path using a single butterfly valve type valve located at the intersection of the T-shaped passages. , the strength of the valve stem can also be ensured.
  • the appropriate eccentric distance can be calculated using the formula.
  • t is the thickness of the valve body
  • ⁇ is the inclination angle of the valve body when it is closed.
  • the shape of the passage is simple, and the body can be manufactured easily.
  • arbitrary position coordinates (X, Y) on the outer circumference of the ellipse are as follows: can be obtained by the formula, it is possible to calculate an appropriate valve body shape using the formula.
  • d is the diameter ( ⁇ d) of the valve body when viewed from the axis of the first outlet passage or the second outlet passage in the state where the passage is switched to the first passage or the second passage
  • t is the thickness of the valve body
  • ⁇ is the inclination angle of the valve body when closed.
  • the flow path switching valve is arranged at a branch point of the first flow path and the second flow path branching in the exhaust passage of the internal combustion engine, and can switch the flow path to either the first flow path or the second flow path.
  • it is particularly suitable for the use of the present invention, which is suitable for switching the flow path of a gas such as exhaust gas, so that it can exhibit good characteristics.
  • the internal combustion engine has a turbine for a supercharger and a catalyst, and the arrangement point is downstream of the turbine and upstream of the catalyst in the exhaust pipe, heat utilization, pressure utilization, or pollutant
  • the exhaust gas can be switched and introduced into a desired flow path for processing such as .
  • the internal combustion engine has an engine and a turbine for a supercharger and is located downstream of the engine and upstream of the turbine in the exhaust pipe, the desired flow to rotate or bypass the turbine. Exhaust gases can be diverted into the channel.
  • the flow path can be switched between the first flow path and the second flow path with a simple structure, and the inclination angle of the valve body necessary for switching between the flow paths can be reduced. .
  • FIG. 2 is a plan view of the embodiment shown in FIG. 1;
  • FIG. FIG. 3 is an enlarged cross-sectional view taken along the line AA shown in FIG. 2;
  • FIG. 3 is an enlarged cross-sectional view taken along line BB shown in FIG. 2;
  • FIG. 2 is an exploded perspective view showing the valve body and valve stem in the embodiment shown in FIG. 1;
  • FIG. 2 is a diagram showing a switching state of flow paths in the embodiment shown in FIG.
  • FIG. 5 is a view showing the valve body in the embodiment shown in FIG. 1, (a) is a plan view of the valve body, (b) is a side view of the valve body, and (c) is the valve body shown in FIG.
  • FIG. 5(d) is a view of the valve body viewed from direction C, (d) is a view of the valve body viewed from direction D in FIG. 4, and (e) is a view of the valve body viewed from direction E in FIG. FIG.
  • FIG. 1 is a schematic diagram showing an example of a conventional automotive internal combustion engine;
  • FIG. Embodiment 1 The schematic which shows the state which has arrange
  • Embodiment 2 The schematic which shows the state which has arrange
  • FIG. 1 to 4 are views showing a preferred embodiment of a flow path switching valve 1 of the present invention
  • FIG. 1 is a perspective view of the flow path switching valve 1
  • FIG. 2 is a plan view of the flow path switching valve 1.
  • 3 is an enlarged cross-sectional view taken along the line AA shown in FIG. 2
  • FIG. 4 is an enlarged cross-sectional view taken along the line BB shown in FIG.
  • the flow path switching valve 1 includes a body 10 having a T-shaped passage 20 formed therein, a valve stem 30 rotatably supported through the body 10, and the valve stem in the passage 20. It consists of a valve element 40 fixed to 30 and an actuator 50 that drives the valve stem 30 to rotate.
  • the body has one inlet 11 and two outlets consisting of a first outlet 12 and a second outlet 13, a bracket 14 for mounting the actuator 50, and a bracket 14 for pivotally supporting the valve stem 30.
  • a plate 15 is fixed on the outside.
  • the passage 20 is formed through the inside of the body 10 so as to intersect in a T-shape.
  • One of the passages 20 on the main pipe side is called a first outlet passage 22 and the other on the main pipe side communicating with the second outlet 13 is called a second outlet passage 23 .
  • the inner diameter d1 of the inlet passage 21, the inner diameter d2 of the first outlet passage 22, and the inner diameter d3 of the second outlet passage 23 in the passage 20 are all the same and have a shape that does not have a bulging portion.
  • the passage 20 Since the passage 20 has a constant inner diameter and does not have a bulging portion, the passage 20 has a simple linear shape. manufacturing method can be selected, and manufacturing can be facilitated.
  • the axis of the first outlet passage 22 and the axis of the second outlet passage 23 are coaxial (axis a2).
  • the axes a2 are formed in directions orthogonal to each other.
  • the valve stem 30 has a substantially cylindrical shape and has a notch 32 with two mounting holes 31 , 31 .
  • the valve body 40 is a butterfly valve type valve body that is plate-shaped, has an elliptical shape in plan view, and has two insertion holes 41 , 41 .
  • the mounting holes 31, 31 and the insertion holes 41, 41 of the valve stem 30 are fixed to the valve stem 30 by means of mounting screws 42, 42 in a state of communicating with each other. It is used in a rotatable state integrally with the rod 30 (see FIG. 5).
  • valve stem 30 and the axis of the valve body 40 do not match, and the valve body 40 rotates eccentrically with respect to the valve stem 30 .
  • the actuator 50 is an air cylinder 51 that reciprocates a rod 52 by air pressure. drive.
  • the swinging range of the cylinder 51 can be regulated by adjusting members 55 and 56 that can increase or decrease the amount of protrusion.
  • the actuator is not limited to an air cylinder, and may be a motor or solenoid operated by electric power (not shown).
  • the valve stem 30 is positioned near the intersection of the axis a1 of the inlet passage 21 and the axes a2 of the first outlet passage 22 and the second outlet passage 23, and on the axis a1 of the inlet passage 21. It is inserted into a through-hole 16 formed through the body 10 in a direction perpendicular to the axes, centering on a point eccentric by a predetermined distance L from the axis a2 of the outlet passage 22 and the second outlet passage 23. ing.
  • This predetermined distance L is obtained by the following formula.
  • t is the thickness of the valve body
  • ⁇ is the inclination angle of the valve body when it is closed.
  • One end 33 of the valve stem 30 is rotatably supported by a bearing 34 mounted on the body 10 and engaged with the crank 54 via a seal member 35, and is engaged with the crank 54 by a nut 36. state is maintained.
  • the other end 37 of the valve stem 30 is supported by another bearing 38 attached to the body 10 .
  • the valve stem 30 is rotationally driven by the rocking motion of the crank 54.
  • the valve stem 30 rotates clockwise, and the valve body 40 fixed to the valve stem 30 tilts at a predetermined inclination angle ⁇ .
  • the second outlet passage 23 is closed, the flow path of the fluid flowing in from the inlet passage 21 is switched to the first flow path C1 communicating with the first outlet passage 22 (see FIG. 6A). ).
  • valve body 40 When the valve is closed (when the second outlet passage 23 is closed), the valve body 40 has a substantially perfect circular shape with a diameter of ⁇ d when viewed from the direction of the first outlet passage 22 (FIG. 7(d)). ), and when viewed from the direction of the second outlet passage 23 on the opposite side, it also exhibits a substantially perfect circular shape with a diameter of ⁇ d (see FIG. 7(e)).
  • valve stem 30 rotates in the opposite direction (counterclockwise) due to the rocking of the crank 54, the valve body 40 fixed to the valve stem 30 reaches the predetermined inclination angle ⁇ .
  • the first outlet passage 22 is closed, and the passage of the fluid flowing from the inlet passage 21 is switched to the second passage C2 communicating with the second outlet passage 23 (see FIG. 6(b)).
  • valve body 40 which is closed when the first outlet passage 22 is closed, has a diameter of ⁇ d when viewed from the direction of the first outlet passage 22 and the direction of the second outlet passage 23. It has a substantially perfect circular shape (not shown).
  • valve body 40 is elliptical in plan view, and in a state in which the flow path is switched to the first flow path C1 or the second flow path C2, the first outlet passage 22 or the second outlet
  • the valve body 40 is substantially circular when viewed from the axis of the passage 23, the inclination angle ⁇ of the valve body when closed is smaller than when the valve body is perfectly circular in plan view. It becomes possible to
  • d is the diameter ( ⁇ d) of the valve body when viewed from the axis of the first outlet passage or the second outlet passage in the state where the passage is switched to the first passage or the second passage
  • t is the thickness of the valve body
  • ⁇ is the inclination angle of the valve body when closed.
  • FIG. 9A and 9B are explanatory views showing a simplified structure to show the effect of eccentrically displacing the valve body 40 from the valve stem 30 in the present invention.
  • FIG. 9A is a comparative example
  • FIG. 9B is the present invention. is.
  • the cross-sectional area of the valve stem 30a becomes less than half of the cross-sectional area before processing, such as 30% or 40%, which reduces the strength and causes breakage. It may lead to malfunction or failure.
  • valve body 40 is not aligned with the valve stem 30a by rotating the valve stem 30a.
  • the valve stem 30a needs only to be processed by the thickness corresponding to the radius, and the cross-sectional area of the valve stem 30a remains at 50% of the cross-sectional area before processing. Sufficient strength can be secured.
  • the diameter of the valve stem and the thickness of the valve body are required to exhibit sufficient strength not to cause deformation due to the pressure of the fluid flowing through the flow path. are in a trade-off relationship, making it difficult to strike a balance.
  • the diameter of the valve stem and the thickness of the valve body in the present invention can be designed as much as possible.
  • FIG. 10 and 11 are explanatory diagrams showing a simplified structure to show the installation position of the valve stem to which the valve body is eccentrically fixed.
  • FIG. 11 the axis of the valve stem 30b is coincident with the intersection point, and the axis of the valve stem 30 is coincident with the point a predetermined distance L off-center from the axis a2 of the outlet passage on the axis a1 of the inlet passage. It is the present invention.
  • the rotating shaft of the valve body 40b fixed to the valve stem 30b is eccentric and does not coincide with the intersection of the axis a1 of the inlet passage and the axis a2 of the outlet passage. Also when the valve stem 30b is rotated in the direction of closing the second outlet passage 23 as shown in FIG. Even when the rod 30b is rotated, a gap g is left between the outer circumference of the valve body 40b and the inner wall of the passage 20b, so that the valve cannot be closed.
  • the valve body 40 has an elliptical shape in a plan view, and has a shape that is substantially circular when viewed from the direction of the first outlet passage 22 or the second outlet passage 23 when closed.
  • the flow path can be switched between the first flow path C1 and the second flow path C2 with a simple structure, and the inclination angle ⁇ of the valve body when closed can be reduced.
  • valve stem 30 is rotated in either direction. Also, the passage 20 can be closed and the flow path can be switched without any problem.
  • FIG. 12 is a schematic diagram showing an example of a conventional automotive internal combustion engine.
  • This internal combustion engine 100A is an internal combustion engine using a gas engine driven by gaseous fuel such as LPG or CNG.
  • the internal combustion engine 100A is a mixture of air sucked from an intake pipe 110 via an intercooler 111 and a throttle valve 112 and fuel supplied from a fuel tank 130 via a regulator 131 and injected from an injector 132. It is supplied to the engine 140 and combusted.
  • the exhaust gas after combustion passes through the exhaust pipe 160 and is released after the harmful substances are processed by the catalyst 190 .
  • a part of the exhaust gas passes through the EGR pipe 150 branched from the exhaust pipe 160, is cooled by the EGR cooler 151, passes through the check valve 152 and the EGR valve 153, and is recirculated to the intake pipe 110. be.
  • Reference numeral 120 denotes a supercharger.
  • a turbine 123 arranged on the side of the exhaust pipe 160 is rotated by the pressure of the exhaust gas passing through the exhaust pipe 160.
  • the rotation of the turbine 123 rotates through a shaft 122 on the side of the intake pipe 110.
  • the air is transmitted to the compressor 123 arranged at , and the air compressed by the compressor 123 is supplied to the engine 140 .
  • the internal combustion engine 100A is provided with a cutoff valve 170 and an exhaust brake valve 180.
  • the fuel is not a gas fuel, but a flow switching valve used in an exhaust passage such as an internal combustion engine using a gasoline engine that uses gasoline or an internal combustion engine using a diesel engine that uses light oil,
  • the invention can be used without problems.
  • FIG. 13 is based on the internal combustion engine 100A shown in FIG. Internal combustion engine 100B is shown in a state where a flow path branching off to path 164 is formed.
  • the flow path switching valve 1 of the present invention is arranged at the location of the branch.
  • the flow path switching valve 1 By arranging the flow path switching valve 1 at a location downstream of the turbine 123 and upstream of the catalyst 190 in the exhaust pipe 160 of the internal combustion engine 100B as in this embodiment, the first flow path 163 and the Of the second flow paths 164, the exhaust gas can be switched and introduced into a desired flow path for heat utilization, pressure utilization, or hazardous substance treatment.
  • FIG. 14 is based on the internal combustion engine 100A shown in FIG. Internal combustion engine 100 ⁇ /b>C is shown in a state where a flow path branching into path 166 is formed.
  • the flow path switching valve 1 of the present invention is arranged at the location of the branch. As shown in FIG. 14, there is no restriction as to which side of the flow path switching valve 1 is used as the first outlet, and any design is possible.
  • the flow path switching valve 1 By arranging the flow path switching valve 1 at a location downstream of the engine 140 and upstream of the turbine 123 in the exhaust pipe 160 of the internal combustion engine 100C as in the present embodiment, the first flow path 165 and the Of the second flow paths 166, the exhaust gas can be switched and introduced into a desired flow path for turbine rotation or bypass passage.
  • 1 channel switching valve 10 body, 11 inlet, 12 first outlet, 13 second outlet, 14 bracket, 15 plate, 16 through hole, 20 passage, 21 inlet passage, 22 first outlet passage, 23 second outlet passage , 30 Valve stem, 31 Mounting hole, 32 Notch, 33 One end, 34 Bearing, 35 Seal member, 36 Other end, 37 Bearing, 38 Nut, 40 Valve body, 41 Insertion hole, 42 Mounting screw, 50 Actuator, 51 Air cylinder, 52 rod, 53 joint member, 54 crank, 55, 56 adjustment member, 100A, 100B, 100C internal combustion engine, 110 intake pipe, 111 intercooler, 112 throttle valve, 120 supercharger, 121 compressor, 122 shaft, 123 turbine, 130 fuel tank, 131 regulator, 132 injector, 140 engine, 150 EGR piping, 151 EGR cooler, 152 check valve, 160 exhaust pipe, 161 exhaust bypass, 162 exhaust bypass valve, 163 first flow path, 164 second 2 flow paths, 165 first flow path, 166 second flow path, 170 shut-off valve, 180 exhaust brake valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

L'invention concerne une soupape de commutation de circuit d'écoulement, laquelle est positionnée au niveau d'un point de branchement dans un circuit d'écoulement d'un fluide et utilisée pour commuter le circuit d'écoulement, la soupape de commutation de circuit d'écoulement présentant une structure simple et solide et une efficacité fonctionnelle exceptionnelle.　Ladite soupape (1) de commutation de circuit d'écoulement comprend : un corps (10) comportant un passage en forme de T (20) formé à son intérieur, et dans lequel un côté tuyau de branchement du passage (20) est utilisé comme passage d'entrée (21), un côté tuyau principal du passage (20) est utilisé comme premier passage de sortie (22), et l'autre côté tuyau principal du passage (20) est utilisé comme second passage de sortie (23) ; une tige (30) de soupape portée axialement à travers le corps (10) ; un corps (40) de soupape en forme de plaque fixé à la tige (30) de soupape à l'intérieur du passage (20) ; et un actionneur (50) destiné à entraîner en rotation la tige (30) de soupape. Le corps (40) de soupape présente une forme circulaire sensiblement parfaite, vu depuis l'axe du premier passage de sortie (22) ou du second passage de sortie (23), lorsque le circuit d'écoulement est commuté.
PCT/JP2021/043276 2021-11-25 2021-11-25 Soupape de commutation de circuit d'écoulement Ceased WO2023095266A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/043276 WO2023095266A1 (fr) 2021-11-25 2021-11-25 Soupape de commutation de circuit d'écoulement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/043276 WO2023095266A1 (fr) 2021-11-25 2021-11-25 Soupape de commutation de circuit d'écoulement

Publications (1)

Publication Number Publication Date
WO2023095266A1 true WO2023095266A1 (fr) 2023-06-01

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PCT/JP2021/043276 Ceased WO2023095266A1 (fr) 2021-11-25 2021-11-25 Soupape de commutation de circuit d'écoulement

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002349720A (ja) * 2001-05-31 2002-12-04 Aisan Ind Co Ltd バルブ装置
WO2009069240A1 (fr) * 2007-11-28 2009-06-04 Mitsubishi Electric Corporation Mécanisme d'élément de soupape pour soupape de circulation des gaz d'échappement
JP2009216184A (ja) * 2008-03-11 2009-09-24 Calsonic Kansei Corp バタフライバルブ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002349720A (ja) * 2001-05-31 2002-12-04 Aisan Ind Co Ltd バルブ装置
WO2009069240A1 (fr) * 2007-11-28 2009-06-04 Mitsubishi Electric Corporation Mécanisme d'élément de soupape pour soupape de circulation des gaz d'échappement
JP2009216184A (ja) * 2008-03-11 2009-09-24 Calsonic Kansei Corp バタフライバルブ

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