WO2024024791A1 - Dispositif rotatif - Google Patents

Dispositif rotatif Download PDF

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Publication number
WO2024024791A1
WO2024024791A1 PCT/JP2023/027230 JP2023027230W WO2024024791A1 WO 2024024791 A1 WO2024024791 A1 WO 2024024791A1 JP 2023027230 W JP2023027230 W JP 2023027230W WO 2024024791 A1 WO2024024791 A1 WO 2024024791A1
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WO
WIPO (PCT)
Prior art keywords
wall
impeller
rotating device
polygonal shape
movable
Prior art date
Application number
PCT/JP2023/027230
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English (en)
Japanese (ja)
Inventor
聡 大内田
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 WO2024024791A1 publication Critical patent/WO2024024791A1/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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable

Definitions

  • Rotating devices such as turbines and compressors include various flow formats such as axial flow, mixed flow, and radial flow. These rotating devices may include movable vanes to adjust the cross-sectional area of the flow path.
  • the movable vanes are arranged in an annular flow path that extends perpendicularly to the central axis of the impeller.
  • the movable vane is rotatably mounted on a plane perpendicular to the central axis of the impeller.
  • Each vane has an axis of rotation parallel to the plane normal.
  • the vanes are arranged on a plane, the clearance between the end face of the vane and the plane is constant regardless of the rotation angle of the vane.
  • the movable vanes are arranged in a cylindrical flow path concentric with the impeller.
  • the movable vanes are rotatably mounted on a cylindrical surface concentric with the impeller.
  • Each vane has an axis of rotation parallel to the normal to the cylindrical surface.
  • the cylindrical surface is straight in the generatrix direction but curved in the circumferential direction. From this, the clearance between the end face of the vane and the cylindrical surface changes depending on the rotation angle of the vane. Specifically, as the vane moves to a more oblique position with respect to the central axis of the impeller, the end face of the vane moves away from the cylindrical surface and the clearance between the vane and the cylindrical surface increases.
  • the movable vanes are arranged in a conical flow path concentric with the impeller.
  • the movable vanes are rotatably mounted on a conical surface concentric with the impeller.
  • Each vane has an axis of rotation parallel to the normal to the conical surface.
  • the conical surface is straight in the generatrix direction but curved in the circumferential direction. From this, the clearance between the end face of the vane and the conical surface changes depending on the rotation angle of the vane. Specifically, as the vane moves to a more oblique position with respect to the central axis of the impeller, the end face of the vane moves away from the conical surface and the clearance between the vane and the conical surface increases.
  • Patent Documents 1 and 2 below disclose a configuration in which the clearance between the vane and the surface is maintained constant regardless of the rotation angle of the vane in a mixed flow turbine.
  • the wall surface of the flow path is formed in a spherical shape, and the movable vanes are rotatably mounted on the spherical surface.
  • a spherical surface is similarly curved in both the generatrix and circumferential directions.
  • the end surface of the vane has a curved shape corresponding to a spherical surface. Therefore, the clearance between the vane and the spherical surface remains constant no matter what rotational angle the vane is in with respect to the central axis of the impeller.
  • An object of the present disclosure is to provide an axial or mixed flow rotating device that can ensure design flexibility.
  • a rotating device includes an impeller, a plurality of movable vanes that are arranged upstream or downstream of the impeller, and are operated to adjust the cross-sectional area of a flow path.
  • an inner wall and an outer wall defining a flow path, the inner wall and the outer wall being movable in the radial direction of the impeller or in a direction inclined with respect to both the axial direction and the radial direction of the impeller.
  • an inner wall and an outer wall including a plurality of sets of mutually parallel planes facing each other across a type vane, the inner wall and the outer wall having corresponding polygonal shapes when viewed in the axial direction of the impeller; and.
  • Each of the plurality of movable vanes may have a trapezoidal shape when viewed in the normal direction of the side surface of each movable vane.
  • Adjacent movable vanes may form a gap between them when the plurality of movable vanes minimizes the cross-sectional area of the flow path.
  • At least one of the inner wall and the outer wall has a circular shape and a polygonal shape in at least one of an end continuous with the space accommodating the impeller and an end opposite to the space accommodating the impeller in the axial direction. It may also include a connecting transition interval.
  • the polygonal shape may be a regular polygonal shape.
  • the interior angles of the polygon may be obtuse angles.
  • FIG. 1 is a schematic perspective view of the rotating device according to the first embodiment when the movable vane is in the open position.
  • FIG. 2 is a schematic cross-sectional view of the rotating device according to the first embodiment.
  • FIG. 3 is a schematic perspective view of the rotating device according to the first embodiment when the movable vane is in the closed position.
  • FIG. 4 is a schematic perspective view of a rotating device according to a second embodiment.
  • FIG. 1 is a schematic perspective view of the rotating device 100 according to the first embodiment when the movable vane 2 is in the open position.
  • rotating device 100 can be a turbine or a compressor.
  • the rotating device 100 can be applied to a turbine or a compressor of a supercharger.
  • the rotating device 100 is not limited to this, and may be applied to other devices.
  • the rotating device 100 includes an impeller 1, a plurality of movable vanes 2, an inner wall 3, and an outer wall 4.
  • Rotating device 100 may further include other components.
  • the impeller 1 is housed in a space S1 defined by a housing (not shown).
  • the impeller 1 rotates around the central axis A1.
  • the axial direction, radial direction, and circumferential direction of the impeller 1 may be simply referred to as axial direction x, radial direction r, and circumferential direction c, respectively.
  • FIG. 2 is a schematic cross-sectional view of the rotating device 100 according to the first embodiment.
  • the cross-sectional view of FIG. 2 includes the central axis A1 of the impeller 1.
  • the impeller 1 is a mixed flow impeller.
  • FIG. 2 when fluid flows from left to right, the impeller 1 directs the fluid flowing into the impeller 1 along the axial direction x along a direction i1 inclined with respect to both the axial direction x and the radial direction r. send out.
  • the impeller 1 when the fluid flows from right to left, the impeller 1 sends out the fluid that flows into the impeller 1 along the direction i1 along the axial direction x.
  • the impeller 1 may be an axial impeller. The axial impeller sends out fluid that flows into the impeller 1 along the axial direction x.
  • impeller 1 includes a hub 11 and a plurality of vanes 12.
  • the hub 11 has a frustoconical shape.
  • the hub 11 may have a cylindrical shape.
  • the vane 12 is fixed to the side surface of the hub 11.
  • the impeller 1 includes nine vanes 12. The number of vanes 12 is not limited to this, and may be less than nine or more than nine.
  • the movable vane 2 is arranged upstream or downstream of the impeller 1 depending on the direction of fluid flow.
  • the plurality of movable vanes 2 are arranged apart from each other along the circumferential direction c.
  • the rotating device 100 includes twelve movable vanes 2.
  • the number of movable vanes 2 is not limited to this, and may be less than 12 or more than 12.
  • the movable vane 2 is operated to adjust the cross-sectional area of the flow path (details will be described later).
  • the inner wall 3 and the outer wall 4 define a part of the flow path.
  • the inner wall 3 and the outer wall 4 are stationary walls.
  • the inner wall 3 and the outer wall 4 may be part of a housing (not shown). Alternatively, one or both of the inner wall 3 and the outer wall 4 may be separate members from the housing and may be attached to the housing.
  • inner wall 3 includes a plurality of flat surfaces 31. As shown in FIG. The plane 31 faces radially outward.
  • the outer wall 4 includes a plurality of planes 41.
  • the plane 41 faces radially inward.
  • the number of planes 31 and the number of planes 41 are equal to the number of movable vanes 2.
  • the inner wall 3 includes twelve planes 31 and the outer wall 4 includes twelve planes 41.
  • the inner wall 3 and the outer wall 4 are arranged such that the plurality of planes 31 and the plurality of planes 41 are parallel to each other.
  • the plane 31 and the plane 41 face each other with the movable vane 2 in between in the direction i2 inclined in both the axial direction x and the radial direction r.
  • Direction i2 may be perpendicular to the above-mentioned direction i1 in which the fluid flows.
  • the impeller 1 is an axial impeller
  • the inner wall 3 and the outer wall 4 may face each other with the movable vane 2 in between in the radial direction r. Since the plane 41 is located on the radially outer side of the plane 31, the plane 41 is longer than the plane 31 in the circumferential direction c.
  • the inner wall 3 and the outer wall 4 have a polygonal shape including the same number of corners as the number of movable vanes 2 when viewed in the axial direction x.
  • the inner wall 3 and the outer wall 4 have a regular dodecagonal shape when viewed in the axial direction x.
  • the inner wall 3 and the outer wall 4 are not limited to this, and may have other polygonal shapes depending on the number of movable vanes 2.
  • the inner wall 3 and the outer wall 4 have a truncated polygonal shape with a number of sides equal to the number of movable vanes 2.
  • the inner wall 3 and the outer wall 4 have a truncated dodecagonal pyramid shape.
  • the inner wall 3 and the outer wall 4 may have a polygonal cylindrical shape in three dimensions, including a number of sides equal to the number of movable vanes 2. .
  • the internal angle between adjacent planes 41 is 150 degrees.
  • the interior angles of the polygon may be obtuse angles other than 150 degrees.
  • the inner wall 3 and the outer wall 4 have a polygonal shape including five or more corners.
  • inner wall 3 and outer wall 4 define a space S2 therebetween.
  • the space S2 is continuous with the above-mentioned space S1 that accommodates the impeller 1.
  • Space S1 and space S2 form part of a flow path.
  • the movable vane 2 is arranged in the space S2. Specifically, the movable vane 2 is rotatably attached to at least one of the plane 31 and the plane 41. The movable vane 2 rotates around the central axis A2. The central axis A2 is parallel to the perpendiculars of the planes 31 and 41. From another perspective, the central axis A2 is perpendicular to the direction i1. The central axis A2 intersects the central axis A1 of the impeller 1. As the movable vane 2 rotates around the central axis A2, the cross-sectional area of the flow path is adjusted.
  • the rotating device 100 may include a drive mechanism (not shown) inside the inner wall 3 or outside the outer wall 4 for rotating the movable vane 2 .
  • the movable vane 2 is placed in the open position. In the open position, the movable vanes 2 maximize the cross-sectional area of the flow path.
  • FIG. 3 is a schematic perspective view of the rotating device 100 according to the first embodiment when the movable vane 2 is in the closed position.
  • the movable vane 2 is placed in the closed position.
  • the movable vanes 2 minimize the cross-sectional area of the flow path.
  • the movable vane 2 in the closed position, is arranged at a more oblique position with respect to the central axis A1 of the impeller 1 than in the open position.
  • the end surface 21 that contacts or opposes the plane 31 is formed flat along the plane 31.
  • the end surface 22 that contacts or opposes the plane 41 is formed flat along the plane 41.
  • the outer plane 41 is longer than the inner plane 31 in the circumferential direction c. Therefore, the space S2 between the plane 41 and the plane 31 has a trapezoidal shape when viewed in the fluid flow direction i1 (see FIG. 2).
  • the movable vanes 2 have a trapezoidal shape when viewed in the normal direction of the side surface 23 of each movable vane 2 so as to fit into this space S2. According to such a configuration, the movable vane 2 can efficiently cover the space S2 between the plane 41 and the plane 31 in the closed position. Further, referring to FIG. 3, the movable vanes 2 are designed to form a slight gap between adjacent movable vanes 2 in the closed position. According to such a configuration, when the movable vanes 2 rotate, contact between adjacent movable vanes 2 can be avoided.
  • the rotating device 100 as described above includes an impeller 1, a plurality of movable vanes 2 that are arranged upstream or downstream of the impeller 1 and are operated to adjust the cross-sectional area of a flow path, and an inner vane that defines a flow path.
  • a wall 3 and an outer wall 4 are provided.
  • the inner wall 3 and the outer wall 4 include a plurality of sets of parallel planes 31 and 41 that face each other with the movable vane 2 in between in the direction i2 inclined in both the axial direction x and the radial direction r.
  • the inner wall 3 and the outer wall 4 have corresponding polygonal shapes when viewed in the axial direction x of the impeller 1.
  • the polygonal inner wall 3 and outer wall 4 include a plane 31 and a plane 41 that are parallel to each other. Therefore, the movable vane 2 can be arranged between planes 31 and 41 that are parallel to each other. In this case, the end surfaces 21 and 22 of the movable vane 2 can be formed into a planar shape. According to such a configuration, even if the movable vane 2 moves from the open position (FIG. 1) to the closed position (FIG. 2) that is more oblique with respect to the central axis A1 of the impeller 1, the movable vane 2 remains in contact with the end surface 21 and the plane. 31 and the gap between the end surface 22 and the plane 41 are maintained constant.
  • each of the plurality of movable vanes 2 has a trapezoidal shape when viewed in the normal direction of the side surface 23 of each movable vane 2.
  • the space between plane 41 and plane 31 has a trapezoidal shape. Therefore, according to such a configuration, the movable vane 2 can efficiently cover the space between the plane 41 and the plane 31 in the closed position.
  • the polygonal shape is a regular polygonal shape. According to such a configuration, the rotation device 100 can be balanced.
  • the interior angles of the polygon are obtuse angles. According to such a configuration, it is possible to prevent the outer plane 41 from becoming excessively longer than the inner plane 31 in the circumferential direction c. Therefore, the rotation device 100 can be balanced.
  • FIG. 4 is a schematic perspective view of a rotating device 100A according to the second embodiment.
  • the rotating device 100A differs from the rotating device 100 of the first embodiment in that the inner wall 3A includes transition sections 32 and 33.
  • the other points of the rotating device 100A may be the same as the rotating device 100.
  • the end surface adjacent to the above-mentioned space S1 that accommodates the impeller 1 has a circular shape.
  • the inner wall 3A includes a transition section 32 that smoothly connects a circular end surface and a regular dodecagonal shape.
  • transition interval 32 can be chamfered.
  • the end surface on the opposite side to the space S1 in the axial direction x also has a circular shape.
  • the inner wall 3A includes a transition section 33 that smoothly connects a circular end surface and a regular dodecagonal shape.
  • transition section 33 can be chamfered.
  • the outer wall 4 may also include similar transition sections at the end adjacent to the space S1 and at the opposite end.
  • Such a rotating device 100A can obtain the same effects as the rotating device 100 of the first embodiment.
  • At least one of the inner wall 3 and the outer wall 4 has a transition section 32 connecting the circular shape and the polygonal shape at an end continuous with the space S1 that accommodates the impeller 1 in the axial direction x.
  • at least one of the inner wall 3 and the outer wall 4 includes a transition section 33 connecting the circular shape and the polygonal shape at the end opposite to the space S1 that accommodates the impeller 1 in the axial direction x. According to such a configuration, fluid can be guided smoothly.
  • the inner wall 3 and the outer wall 4 have a regular polygonal shape when viewed in the axial direction x.
  • the inner wall 3 and the outer wall 4 may not have a regular polygonal shape when viewed in the axial direction x.
  • the lengths of multiple sides of a polygon may not be equal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Ce dispositif rotatif (100) comprend : une roue (1) ; une pluralité d'aubes de type mobile (2) qui sont disposées en amont ou en aval de la roue (1) et actionnées de façon à ajuster la surface de section transversale d'un passage d'écoulement ; et une paroi interne (3) et une paroi externe (4) qui définissent le passage d'écoulement. Dans une direction radiale r de la roue (1), ou dans une direction inclinée par rapport à la fois à la direction axiale x et à la direction radiale r de la roue (1), la paroi interne (3) et la paroi externe (4) comprennent une pluralité de groupes de surfaces plates (31, 41) qui sont parallèles les unes aux autres et se font face avec les aubes mobiles (2) entre elles. Vu dans la direction axiale x de la roue (1), la paroi interne (3) et la paroi externe (4) ont des formes polygonales correspondant l'une à l'autre.
PCT/JP2023/027230 2022-07-29 2023-07-25 Dispositif rotatif WO2024024791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-121177 2022-07-29
JP2022121177 2022-07-29

Publications (1)

Publication Number Publication Date
WO2024024791A1 true WO2024024791A1 (fr) 2024-02-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001193695A (ja) * 2000-01-12 2001-07-17 Mitsubishi Heavy Ind Ltd 圧縮機
JP2004278386A (ja) * 2003-03-14 2004-10-07 Hitachi Industries Co Ltd ターボ形流体機械
JP2010230003A (ja) * 2009-03-26 2010-10-14 General Electric Co <Ge> ダクト部材をベースとしたタービンノズル
JP2011144722A (ja) * 2010-01-13 2011-07-28 Ihi Corp ベーン機構
JP2014534378A (ja) * 2011-12-01 2014-12-18 アイ・エイチ・アイ チャージング システムズ インターナショナル ゲーエムベーハー 排気ガスターボチャージャーなどに用いられる回動可能なガイド部材を斜めに配設して成る流体エネルギ機械

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001193695A (ja) * 2000-01-12 2001-07-17 Mitsubishi Heavy Ind Ltd 圧縮機
JP2004278386A (ja) * 2003-03-14 2004-10-07 Hitachi Industries Co Ltd ターボ形流体機械
JP2010230003A (ja) * 2009-03-26 2010-10-14 General Electric Co <Ge> ダクト部材をベースとしたタービンノズル
JP2011144722A (ja) * 2010-01-13 2011-07-28 Ihi Corp ベーン機構
JP2014534378A (ja) * 2011-12-01 2014-12-18 アイ・エイチ・アイ チャージング システムズ インターナショナル ゲーエムベーハー 排気ガスターボチャージャーなどに用いられる回動可能なガイド部材を斜めに配設して成る流体エネルギ機械

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