WO2020049950A1 - Mécanisme à capacité variable et compresseur à suralimentation du type à capacité variable - Google Patents

Mécanisme à capacité variable et compresseur à suralimentation du type à capacité variable Download PDF

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Publication number
WO2020049950A1
WO2020049950A1 PCT/JP2019/031434 JP2019031434W WO2020049950A1 WO 2020049950 A1 WO2020049950 A1 WO 2020049950A1 JP 2019031434 W JP2019031434 W JP 2019031434W WO 2020049950 A1 WO2020049950 A1 WO 2020049950A1
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WO
WIPO (PCT)
Prior art keywords
nozzle
groove
drive
link plate
gap
Prior art date
Application number
PCT/JP2019/031434
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English (en)
Japanese (ja)
Inventor
隆文 植田
Original Assignee
株式会社Ihi
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 株式会社Ihi filed Critical 株式会社Ihi
Publication of WO2020049950A1 publication Critical patent/WO2020049950A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • 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
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • 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
    • 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
    • F02B37/24—Control of the pumps by using pumps or turbines with adjustable guide vanes
    • 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 disclosure relates to a variable displacement mechanism and a variable displacement supercharger.
  • variable displacement mechanism described in Patent Document 1 below is known.
  • This variable capacity mechanism includes a drive ring that rotates by an external driving force, and a nozzle link plate that rotates together with the nozzle vane.
  • the drive ring In order to transmit a driving force from the drive ring to the nozzle link plate, the drive ring is provided with a joint portion, and the nozzle link plate is provided with a concave groove fitted into the joint portion.
  • the driving force is transmitted through the fitting portion between the joint portion and the concave groove as described above.
  • JP 2000-199433 A JP 2010-065591 JP JP-A-63-147921
  • variable displacement mechanism if foreign matter enters the gap between the joint and the groove, it causes wear of the joint and the groove. In addition, the accurate operation of the variable displacement mechanism may be hindered by wear. Further, the life of the variable displacement mechanism may be shortened due to wear.
  • the material of the turbine housing includes iron, and the temperature of the turbine housing becomes 700-800 ° C. during operation of the turbine. For this reason, rust may be generated in the turbine housing, and the rust may fall off due to vibration during operation or the like and become the above-described foreign matter.
  • the present disclosure describes a variable displacement mechanism and a supercharger that suppress wear of a joint portion and a groove.
  • a variable capacity mechanism is a variable capacity mechanism that rotates a plurality of nozzle vanes by an external driving force, a driving ring that is rotated by a driving force, and a nozzle joint provided on the driving ring. And a nozzle link plate having a concave groove fitted with the nozzle joint portion and rotating together with the nozzle vane by displacement of the nozzle joint portion, wherein the nozzle joint portion is viewed in the rotational radial direction of the drive ring.
  • This is a variable capacity mechanism having a shape that covers the gap with the concave groove as seen in FIG.
  • variable displacement mechanism and the variable displacement supercharger of the present disclosure it is possible to suppress wear of the joint portion and the groove.
  • variable displacement type supercharger of an embodiment. It is a figure showing the variable capacity mechanism seen from the direction of an axis. It is a figure which expands and shows the fitting part of a nozzle joint part and the concave groove of a nozzle link plate. It is a figure which expands and shows the fitting part of a drive joint part and the concave groove of a drive link plate.
  • (A) (b) is a figure which shows the reference form of a fitting part. It is a perspective view which shows the reference form of a fitting part.
  • a variable capacity mechanism is a variable capacity mechanism that rotates a plurality of nozzle vanes by an external driving force, a driving ring that is rotated by a driving force, and a nozzle joint provided on the driving ring. And a nozzle link plate having a concave groove fitted with the nozzle joint portion and rotating together with the nozzle vane by displacement of the nozzle joint portion, wherein the nozzle joint portion is viewed in the rotational radial direction of the drive ring.
  • This is a variable capacity mechanism having a shape that covers the gap with the concave groove as seen in FIG.
  • the nozzle joint portion has a pair of outer surfaces facing the inner surface of the groove with a gap, and a position of the inner surface in the width direction of the groove formed at a tip portion protruding from the groove in the depth direction of the groove. It is good also as having an overhang part which overhangs.
  • the variable capacity mechanism of the present disclosure is a variable capacity mechanism that rotates a plurality of nozzle vanes by an external driving force, a driving link plate that rotates by a driving force, a concave groove provided in the driving link plate, A drive ring having a drive joint portion fitted into the concave groove and rotating by the displacement of the concave groove; and a nozzle link plate rotating together with the nozzle vane due to the rotation of the drive ring;
  • the portion is a variable displacement mechanism that has a shape that covers a gap with the concave groove when viewed from the line of sight in the rotation radial direction of the drive ring.
  • the drive joint portion has a pair of outer surfaces facing the inner surface of the groove with a gap, and a position of the inner surface in the width direction of the groove formed at a tip portion protruding from the groove in the depth direction of the groove. It is good also as having an overhang part which overhangs.
  • a supercharger according to the present disclosure is a variable displacement supercharger including any of the above-described variable displacement mechanisms.
  • FIG. 1 is a cross-sectional view of a section including the rotation axis H of the variable displacement supercharger 1 of the present embodiment.
  • the supercharger 1 is a variable displacement supercharger having a variable displacement mechanism.
  • the supercharger 1 is applied to, for example, an internal combustion engine of a ship or a vehicle.
  • the supercharger 1 includes a turbine 2 and a compressor 3.
  • the turbine 2 includes a turbine housing 4 and a turbine wheel 6 housed in the turbine housing 4.
  • the turbine housing 4 has a scroll passage 16 extending in the circumferential direction around the turbine wheel 6.
  • the compressor 3 includes a compressor housing 5 and a compressor wheel 7 housed in the compressor housing 5.
  • the compressor housing 5 has a scroll passage 17 extending in the circumferential direction around the compressor wheel 7.
  • the turbine wheel 6 is provided at one end of the rotating shaft 14, and the compressor wheel 7 is provided at the other end of the rotating shaft 14.
  • a bearing housing 13 is provided between the turbine housing 4 and the compressor housing 5.
  • the rotating shaft 14 is rotatably supported by a bearing housing 13 via a bearing 15, and the rotating shaft 14, the turbine wheel 6 and the compressor wheel 7 rotate around the rotation axis H as an integral rotating body 12.
  • An exhaust gas inlet (not shown) and an exhaust gas outlet 10 are provided in the turbine housing 4.
  • Exhaust gas discharged from an internal combustion engine (not shown) flows into the turbine housing 4 through the exhaust gas inlet, flows into the turbine wheel 6 through the scroll passage 16, and rotates the turbine wheel 6. After that, the exhaust gas flows out of the turbine housing 4 through the exhaust gas outlet 10.
  • the compressor housing 5 is provided with a suction port 9 and a discharge port (not shown).
  • a suction port 9 When the turbine wheel 6 rotates as described above, the compressor wheel 7 rotates via the rotating shaft 14. The rotating compressor wheel 7 sucks outside air through the suction port 9. This air is compressed through the compressor wheel 7 and the scroll flow path 17 and is discharged from the discharge port. The compressed air discharged from the discharge port is supplied to the above-described internal combustion engine.
  • a movable nozzle vane 21 is provided in a gas inflow path 19 connecting the scroll flow path 16 and the turbine wheel 6.
  • a plurality of nozzle vanes 21 are arranged at equal intervals on a circumference around the rotation axis H.
  • Each nozzle vane 21 rotates synchronously around an axis parallel to the rotation axis H.
  • the turbine 2 includes a variable displacement mechanism 20.
  • variable capacity mechanism 20 will be described in more detail.
  • the terms “axial direction”, “radial direction”, “circumferential direction”, and the like mean the rotational axis H direction, the rotational radial direction, and the rotational circumferential direction of the turbine wheel 6, respectively.
  • the terms “upstream” and “downstream” mean upstream and downstream of the exhaust gas in the scroll flow path 16.
  • a side closer to the turbine 2 (left side in FIG. 1) may be simply referred to as “turbine side”
  • compressor side a side closer to the compressor 3 (right side in FIG. 1) may be simply referred to as “compressor side”.
  • FIG. 2 is a diagram showing the variable displacement mechanism 20 as viewed from the axial direction.
  • the variable capacity mechanism 20 includes a plurality of (five in the example in the figure) nozzle vanes 21, a mechanism main body 29, a drive link plate 31, a drive ring 33, and a plurality of nozzle link plates. 35.
  • the mechanism body 29 is fixed to the turbine housing 4.
  • the nozzle vane 21 has a rotating shaft 21a.
  • the mechanism main body 29 is provided with the same number of bearing holes 23 (see FIG. 1) extending in the axial direction as the nozzle vanes 21.
  • the bearing holes 23 are arranged at equal intervals on a circumference around the rotation axis H.
  • the rotating shaft 21a of each nozzle vane 21 is inserted into the bearing hole 23, respectively.
  • Each nozzle vane 21 is rotatable about a rotation shaft 21a in the gas inflow path 19 (see FIG. 1).
  • a drive force is applied to the drive link plate 31 from an actuator (not shown) outside the turbine 2.
  • the drive link plate 31 rotates in both directions around the rotation axis J parallel to the rotation axis H with respect to the mechanism main body 29.
  • a concave groove 32 that opens toward the inside in the radial direction is formed.
  • the drive ring 33 is attached to the mechanism main body 29 and is rotatable around the rotation axis H with respect to the mechanism main body 29.
  • the drive ring 33 has a ring shape centered on the rotation axis H, and includes a projecting portion 34 projecting radially outward.
  • the projecting portion 34 is provided with a drive joint portion 71.
  • the drive joint portion 71 protrudes toward the compressor 3 and is fitted in the above-described concave groove 32.
  • the drive ring 33 has a nozzle joint 51.
  • the nozzle joints 51 are provided in the same number as the nozzle vanes 21, are arranged at equal intervals in the circumferential direction, and protrude toward the compressor 3.
  • each nozzle link plate 35 is joined to the rotation shaft 21 a of the nozzle vane 21.
  • a concave groove 36 is formed at the tip of the nozzle link plate 35.
  • the concave groove 36 is open radially outward.
  • the concave groove 36 is fitted with the nozzle joint portion 51.
  • each part of the variable capacity mechanism 20 operates as follows.
  • the driving link plate 31 is rotated around the rotation axis J by an external driving force
  • the driving joint 71 is pushed in the circumferential direction with the displacement of the concave groove 32.
  • the drive ring 33 rotates around the rotation axis H with respect to the mechanism main body 29.
  • the concave groove 36 is pressed in the circumferential direction with the displacement of the nozzle joint portion 51.
  • each nozzle link plate 35 rotates together with each nozzle vane 21 with respect to the mechanism main body 29 about the rotation shaft 21 a.
  • the concave groove 36 has a pair of inner side surfaces 57 extending substantially in the radial direction and parallel to each other.
  • the nozzle joint portion 51 has a round pin 53 fixed to the drive ring 33 and a rotating member 55 rotatably attached to the round pin 53.
  • the rotating member 55 has a pair of outer surfaces 59 extending substantially in the radial direction and parallel to each other.
  • Each outer surface 59 of the rotating member 55 and each inner surface 57 of the concave groove 36 face each other with a slight gap 58 therebetween.
  • the gap 58 corresponds to the play between the nozzle joint portion 51 and the nozzle link plate 35, and the actual dimensional ratio is as shown in the drawing. Absent.
  • variable capacity mechanism 20 there is a possibility that foreign matter such as dust and rust may enter the gap 58 between the concave groove 36 and the nozzle joint portion 51. Then, when the variable displacement mechanism 20 is driven, the outer surface 59 of the rotating member 55 and the inner surface 57 of the concave groove 36 slide by biting foreign matter, and the outer surface 59 and the inner surface 57 are worn. Cause Such wear may shorten the life of the nozzle link plate 35 and the nozzle joint portion 51, and may hinder accurate operation of the variable displacement mechanism 20.
  • this type of supercharger 1 is generally operated in a posture in which the rotation axis H is horizontal. In this case, in some of the nozzle link plates 35, the concave grooves 36 are opened upward. Therefore, there is a particular concern that foreign matter that has fallen from above due to gravity will enter the gap 58. Further, since the material of the turbine housing 4 includes iron, and the temperature of the turbine housing 4 becomes 700 to 800 ° C. during operation of the turbine 2, rust may be generated in the turbine housing 4. Such rust may fall off due to vibration during operation and become the above-mentioned foreign matter.
  • the rotating member 55 has a shape that covers the gap 58 when viewed from the outside in the radial direction with a line of sight in the radial direction in order to suppress the entry of foreign matter into the gap 58.
  • the distal end portion 55 a of the rotating member 55 protrudes radially outward from the concave groove 36 in the depth direction of the concave groove 36.
  • a projecting portion 63 is formed at the distal end portion 55a, and the projecting portion 63 projects beyond the inner surface 57 in the width direction of the concave groove 36.
  • the projecting portion 63 When viewed in a line of sight parallel to the inner side surface 57 of the concave groove 36, the projecting portion 63 covers and covers a radially outer end surface 61 of the nozzle link plate 35. Note that the width of the distal end portion 55a including the overhang portion 63 is substantially equal to the width of the distal end surface 61 of the nozzle link plate 35.
  • the rotating member 55 has a T-shape as a whole.
  • the overhang portion 63 as described above may be formed integrally with the main body of the rotating member 55, or may be separately joined to the main body.
  • the rotating member 55 covers the gap 58 when viewed from the outside in the radial direction as viewed from the radial direction.
  • the projecting portion 63 of the nozzle joint portion 51 covers and covers the gap 58 when viewed from the outside in the radial direction, foreign matter hardly enters the gap 58.
  • foreign substances that try to enter the gap 58 from the radial direction are suppressed. Therefore, intrusion of foreign matter into the gap 58 is suppressed, and the above-described wear is suppressed.
  • the service life of the nozzle link plate 35 and the nozzle joint portion 51 is extended, and the accurate operation of the variable displacement mechanism 20 is ensured.
  • the fitting portion 70 between the drive joint portion 71 and the concave groove 32 has the same configuration as the fitting portion 50. That is, as shown in FIG. 4, in the fitting portion 70, the concave groove 32 has a pair of inner side surfaces 77 extending substantially in the radial direction and parallel to each other.
  • the drive joint 71 has a round pin 73 fixed to the drive ring 33 and a rotating member 75 rotatably attached to the round pin 73.
  • the rotating member 75 has a pair of outer surfaces 79 extending substantially in the radial direction and parallel to each other.
  • Each outer surface 79 of the rotating member 75 and each inner surface 77 of the concave groove 32 face each other with a slight gap 78 therebetween.
  • the gap 78 corresponds to a play between the drive joint portion 71 and the drive link plate 31, and the actual dimensional ratio is as shown in the drawing. Absent.
  • the rotating member 75 has a shape that covers the gap 78 when viewed from the outside in the radial direction with a line of sight in the radial direction.
  • the tip end portion 75a of the rotating member 75 protrudes radially inward from the groove 32 in the depth direction of the groove 32.
  • a projecting portion 83 is formed at the tip end portion 75a, and the projecting portion 83 projects beyond the inner surface 77 in the width direction of the concave groove 32.
  • the overhang portion 83 covers and covers the radially outer end surface 81 of the drive link plate 31.
  • the width of the distal end portion 75 a including the overhang portion 83 is substantially equal to the width of the distal end surface 81 of the drive link plate 31.
  • the rotating member 75 has a T-shape as a whole.
  • the overhang portion 83 as described above may be formed integrally with the main body of the rotating member 75, or may be separately joined to the main body.
  • the drive link plate 31 rotates about the rotation axis J, the attitude of the drive link plate 31 in the radial direction changes.
  • the rotating member 75 covers the gap 78 when viewed from the outside in the radial direction as viewed from the radial direction.
  • the projecting portion 83 of the drive joint 71 covers and covers the gap 78 when viewed from the outside in the radial direction, foreign matter is unlikely to enter the gap 78.
  • foreign substances that try to enter the gap 78 from the radial direction are suppressed. Therefore, intrusion of foreign matter into the gap 78 is suppressed, and the above-described wear is suppressed.
  • the life of the drive link plate 31 and the drive joint part 71 is extended, and accurate operation of the variable displacement mechanism 20 is ensured.
  • both the fitting portion 50 and the fitting portion 70 have the above-described configuration for suppressing foreign matter intrusion, but the configuration is changed to one of the fitting portion 50 and the fitting portion 70. Only one may be provided. Further, it is not essential that all the fitting portions 50 have the above-described configuration for suppressing foreign matter intrusion, and only some of the fitting portions 50 may have the configuration. For example, as a countermeasure against foreign matter falling from above due to gravity, the fitting portion 50 (for example, the fitting portion located above the rotation axis H) in which the concave groove 36 opens upward or obliquely upward. Only 50) may be provided with the above-described configuration for suppressing foreign matter intrusion.
  • the fitting portion 50 of the above-described embodiment includes the concave groove 36 that opens outward in the radial direction. A configuration of suppression may be applied.
  • the fitting portion 70 of the above-described embodiment includes the concave groove 32 that opens radially inward, but the fitting portion 70 that includes a concave groove that opens radially outward has A configuration for suppressing foreign matter intrusion may be applied.
  • FIG. 5A, FIG. 5B and FIG. 6 can be considered as a structure for preventing foreign matter from entering the fitting portion between the links.
  • a pair of overhangs 113 are formed at the radially outer end of the nozzle link plate 111. It protrudes inward in the circumferential direction.
  • the gap 116 between the concave groove 112 and the nozzle joint 115 is covered and covered by the overhang 113 when viewed from the outside in the radial direction. This configuration makes it difficult for foreign matter to enter the gap 116.
  • a connection portion 117 may be formed instead of the pair of overhang portions 113.
  • the connection part 117 connects the front ends of the nozzle link plates 111 in the circumferential direction.
  • the fitting portion 130 of the variable capacity mechanism shown in FIG. 6 has a U-shaped wall 132.
  • the wall 132 rises in the axial direction from the drive ring 33 and opens inward in the radial direction.
  • the wall 132 has a pair of wall surfaces 133 extending substantially in the radial direction.
  • the tip portion 131a of the nozzle link plate 131 is located between the pair of wall surfaces 133.
  • 5A, 5B, and 6 can be similarly applied to the fitting portion between the drive link plate and the drive joint.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Control Of Turbines (AREA)

Abstract

La présente invention concerne un mécanisme à capacité variable comprenant : une bague d'entraînement mise en rotation au moyen d'une force d'entraînement en provenance de l'extérieur ; une partie joint de buse agencée sur la bague d'entraînement ; et une plaque de liaison de buse comportant une rainure en retrait ajustée à la partie de joint de buse et tournant grâce à une aube de buse en raison d'un déplacement de la partie joint de buse. La partie joint de buse prend une forme lui permettant de recouvrir l'écartement entre la partie joint de buse et la rainure en retrait, vue depuis la direction radiale de la biellette d'entraînement rotative.
PCT/JP2019/031434 2018-09-07 2019-08-08 Mécanisme à capacité variable et compresseur à suralimentation du type à capacité variable WO2020049950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018167634A JP2021193274A (ja) 2018-09-07 2018-09-07 可変容量機構及び可変容量型過給機
JP2018-167634 2018-09-07

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WO2020049950A1 true WO2020049950A1 (fr) 2020-03-12

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1130128A (ja) * 1997-07-10 1999-02-02 Toyota Motor Corp 可変ノズル型ターボチャージャ
JP2007056791A (ja) * 2005-08-25 2007-03-08 Mitsubishi Heavy Ind Ltd 可変容量型排気ターボ過給機及び可変ノズル機構構成部材の製造方法
JP2008075635A (ja) * 2006-09-25 2008-04-03 Ihi Corp 過給機及び過給機の制御方法
JP2014224498A (ja) * 2013-05-16 2014-12-04 株式会社豊田自動織機 可変ノズルターボチャージャ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1130128A (ja) * 1997-07-10 1999-02-02 Toyota Motor Corp 可変ノズル型ターボチャージャ
JP2007056791A (ja) * 2005-08-25 2007-03-08 Mitsubishi Heavy Ind Ltd 可変容量型排気ターボ過給機及び可変ノズル機構構成部材の製造方法
JP2008075635A (ja) * 2006-09-25 2008-04-03 Ihi Corp 過給機及び過給機の制御方法
JP2014224498A (ja) * 2013-05-16 2014-12-04 株式会社豊田自動織機 可変ノズルターボチャージャ

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