EP2395246A1 - Roue à aubes, compresseur et procédé de fabrication de roue à aubes - Google Patents

Roue à aubes, compresseur et procédé de fabrication de roue à aubes Download PDF

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Publication number
EP2395246A1
EP2395246A1 EP10738401A EP10738401A EP2395246A1 EP 2395246 A1 EP2395246 A1 EP 2395246A1 EP 10738401 A EP10738401 A EP 10738401A EP 10738401 A EP10738401 A EP 10738401A EP 2395246 A1 EP2395246 A1 EP 2395246A1
Authority
EP
European Patent Office
Prior art keywords
downstream
impeller
upstream
shroud
blade segments
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.)
Withdrawn
Application number
EP10738401A
Other languages
German (de)
English (en)
Other versions
EP2395246A4 (fr
Inventor
Akihiro Nakaniwa
Yujiro Watanabe
Toyoaki Yasui
Kazuyoshi Miyagawa
Yuya Konno
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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
Priority claimed from JP2009025944A external-priority patent/JP2010121612A/ja
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP2395246A1 publication Critical patent/EP2395246A1/fr
Publication of EP2395246A4 publication Critical patent/EP2395246A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F04D29/285—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors the compressor wheel comprising a pair of rotatable bladed hub portions axially aligned and clamped together

Definitions

  • the present invention relates, particularly, to shrouded impellers suitable for use in centrifugal compressors and mixed flow compressors, compressors including such impellers, and methods for producing impellers.
  • Known impellers used for centrifugal compressors and mixed flow compressors typically include open impellers without a shroud and shrouded impellers with a shroud.
  • a shrouded impeller is known to be advantageous over an open impeller in that it has a high compression efficiency with, for example, a low flow loss because it has no gap between impeller blades and a casing accommodating the impeller.
  • a shrouded impeller has a problem in that it is less easily produced than an open impeller because it has a shroud.
  • Methods proposed for solving the problem described above include a method in which a hub and blades and a shroud are separately formed, and the blades and the shroud are bonded; a method in which a shrouded impeller is integrally formed by machining; and a method in which an impeller is formed as an inner segment and an outer segment, and the two segments are bonded (see, for example, Patent Literatures 1 and 2).
  • a bonding material disposed at the joints between the blades and the shroud might flow downward during the bonding process. This poses a problem in that a bonding failure is likely to occur in the upper regions of the joints because of insufficient bonding material.
  • the method in which a shrouded impeller is integrally formed by machining has a problem in that the shrouded impeller has a lower performance than those fabricated by other methods because machining tools such as endmills have limited machining ranges.
  • unremoved portions are left in the spaces between the hub and the shroud, that is, the spaces through which a fluid flows, because the machining range of the machining tool is limited by interference with the hub or the shroud.
  • These unremoved portions disrupt the flow of the fluid flowing therearound, thus posing a problem in that the shrouded impeller has a lower performance than those fabricated by other methods that leave no unremoved portions.
  • An object of the present invention which has been made to solve the above problems, is to provide an impeller, a compressor, and a method for producing an impeller that afford improved reliability and performance.
  • An impeller according to a first aspect of the present invention includes a hub which is supported rotatably about an axis of rotation and whose diameter increases from upstream to downstream sides along a fluid flow, a plurality of impeller blades extending radially outward from an outer circumferential surface of the hub, and a shroud formed in a cylindrical shape whose diameter increases from the upstream to downstream sides along the fluid flow and joining outer circumferential ends of the plurality of impeller blades.
  • the impeller blades are composed of upstream blade segments and downstream blade segments bonded at a bonding surface extending in a direction substantially perpendicular to the axis of rotation, the upstream blade segments are integral with at least a portion of the shroud, and the downstream blade segments are integral with at least a portion of the hub.
  • the impeller has smaller unremoved portions than an impeller fabricated by machining using a machining tool, thus inhibiting disruption of the fluid flow through the impeller. That is, the above upstream blade segments and the above downstream blade segments have smaller unremoved portions than in the case where the entire impeller is integrally formed because they interfere with a machining tool over a narrower region. Accordingly, the impeller having the upstream blade segments and the downstream blade segments bonded at the bonding surface has smaller unremoved portions.
  • the upstream blade segments are formed integrally with at least a portion of the shroud and the downstream blade segments are formed integrally with at least a portion of the hub, sufficient strength is ensured in regions where a high stress occurs as the impeller is rotated, thus preventing damage to the impeller.
  • the part composed of the upstream blade segments and at least a portion of the shroud and the part composed of the downstream blade segments and at least a portion of the hub can be fabricated with higher precision than in a method in which impeller blades and a shroud are bonded. As a result, the impeller having the two parts bonded can be fabricated with higher precision.
  • the downstream blade segments and the hub are placed with the bonding surface, described above, substantially horizontal before at least the upstream blade segments and the downstream blade segments are bonded, so that the bonding material used for bonding does not easily flow downward.
  • the bonding material is present substantially uniformly over the entire bonding surface, thus preventing a bonding failure due to insufficient bonding material.
  • extending in a direction substantially perpendicular to the axis of rotation means that, if the bonding surface is formed in a conical shape whose centerline coincides with the axis of rotation, the bonding surface may be inclined to such an extent that a melted bonding material does not flow downward when the axis of rotation is oriented substantially vertically.
  • the shroud is composed of an upstream shroud and a downstream shroud bonded at the bonding surface, the upstream blade segments are formed integrally with the upstream shroud, and the downstream blade segments are formed integrally with the downstream shroud and the hub.
  • the impeller has smaller unremoved portions than an impeller fabricated by machining using a machining tool, thus inhibiting disruption of the fluid flow through the impeller.
  • upstream blade segments are formed integrally with the upstream shroud and the downstream blade segments are formed integrally with the downstream shroud and the hub, sufficient strength is ensured in regions where a high stress occurs as the impeller is rotated, thus preventing damage to the impeller.
  • the upstream blade segments are formed integrally with the shroud, and the downstream blade segments are formed integrally with the hub.
  • the impeller has smaller unremoved portions than an impeller fabricated by machining using a machining tool, thus inhibiting disruption of the fluid flow through the impeller.
  • upstream blade segments are formed integrally with the shroud and the downstream blade segments are formed integrally with the hub, sufficient strength is ensured in regions where a high stress occurs as the impeller is rotated, thus preventing damage to the impeller.
  • a compressor according to a second aspect of the present invention includes the impeller according to the above first aspect.
  • the impeller according to the above first aspect is provided, disruption of the fluid flow through the impeller is inhibited. In addition, sufficient strength is ensured in regions where a high stress occurs as the impeller is rotated, thus preventing damage to the impeller. Furthermore, the impeller can be fabricated with higher precision At the same time, a bonding failure can be prevented at the bonding surface of the impeller.
  • a method for producing an impeller according to a third aspect of the present invention includes a forming step of forming an upstream part including upstream blade segments, disposed upstream along a fluid flow, of impeller blades divided at a dividing surface extending in a direction substantially perpendicular to an axis of rotation of a hub and at least a portion of a shroud and a downstream part including downstream blade segments, disposed downstream, of the impeller blades divided at the dividing surface and at least a portion of the hub; and a bonding step of placing the downstream part with the dividing surface substantially horizontal and bonding the upstream part and the downstream part at the dividing surface.
  • the impeller has smaller unremoved portions than an impeller fabricated by machining using a machining tool, thus inhibiting disruption of the fluid flow through the impeller.
  • the upstream blade segments are formed integrally with at least a portion of the shroud and the downstream blade segments are formed integrally with at least a portion of the hub, sufficient strength is ensured in regions of the upstream and downstream parts where a high stress occurs as the impeller is rotated, thus preventing damage to the impeller.
  • the upstream part and the downstream part can be fabricated with higher precision than in a method in which impeller blades and a shroud are bonded, the impeller having the two parts bonded can be fabricated with higher precision.
  • the impeller, the compressor, and the method for producing an impeller of the present invention provide the advantage of improved performance because the impeller can be fabricated with higher precision, thus inhibiting disruption of the fluid flow through the impeller. Also provided is the advantage of improved reliability because sufficient strength is ensured in regions where a high stress occurs as the impeller is rotated, thus preventing damage to the impeller, and also because a bonding failure is prevented at the bonding surface of the impeller.
  • FIG. 1 is a schematic diagram illustrating, in outline, the structure of the compressor of this embodiment.
  • the compressor of the present invention is applied to a centrifugal compressor for pumping a process gas (fluid) in a chemical plant
  • the compressor is not limited to a centrifugal compressor and may instead be applied to a mixed flow compressor or a compressor used for another application; that is, the type of compressor is not particularly limited.
  • the centrifugal compressor (compressor) 1 pumps a fluid taken in from the upstream side (upper side in Fig. 1 ) to the downstream side (lateral direction in Fig. 1 ).
  • the centrifugal compressor 1 includes a rotating shaft 2 and an impeller 3.
  • the rotating shaft 2 is a substantially cylindrical member supported rotatably about an axis of rotation L and transmits an externally transmitted torque to the impeller 3.
  • Fig. 2 is a schematic diagram illustrating the structures of upstream and downstream parts of the impeller in Fig. 1 .
  • the impeller 3 is rotated about the axis of rotation L by the rotating shaft 2 and, as it is rotated, it takes in a fluid from the upstream side and discharges the fluid to the downstream side.
  • the impeller 3 includes an upstream part 3U and a downstream part 3L divided at a dividing surface (bonding surface) P1.
  • the dividing surface P1 is a surface extending in a direction substantially perpendicular to the axis of rotation L and is a surface at which the impeller 3 is divided into the upstream part 3U and the downstream part 3L and also at which the upstream part 3U and the downstream part 3L are bonded.
  • the dividing surface P1 may be a flat surface or a conical surface having the axis of rotation L as the axis thereof and is not particularly limited. If the dividing surface P1 is a conical surface, the dividing surface P1 is inclined to such an extent that a melted bonding material used for the upstream part 3U and the downstream part 3L does not flow downward when the axis of rotation L is oriented substantially vertically.
  • the upstream part 3U is bonded to the downstream part 3L at the dividing surface P1 to constitute the impeller 3.
  • the upstream part 3U includes an upstream shroud 4U and upstream blade segments 5U.
  • the upstream shroud 4U is an upstream segment (upper segment in Fig. 1 ) of a shroud 4 divided in two at the dividing surface P1 and is bonded to a downstream shroud 4L at the dividing surface P1 to constitute the shroud 4.
  • the upstream shroud 4U integrally constitutes the upstream part 3U, together with the upstream blade segments 5U.
  • the shroud 4 is a cylindrical member whose diameter increases from the upstream to downstream sides or an angular plate-like member inclined toward a hub 6 so as to extend radially outward.
  • the shroud 4 joins the tips of a plurality of impeller blades 5.
  • the shape of the shroud 4 may be a known shape and is not particularly limited.
  • the upstream blade segments 5U are upstream segments of the impeller blades 5 divided in two at the dividing surface P1 and are bonded to downstream blade segments 5L at the dividing surface P1 to constitute the impeller blades 5.
  • the upstream blade segments 5U integrally constitute the upstream part 3U, together with the upstream shroud 4U.
  • the impeller blades 5 are blades extending radially outward from the outer circumferential surface of the hub 6 and arranged at regular intervals circumferentially about the axis of rotation L.
  • the shape of the impeller blades 5 may be a known shape and is not particularly limited.
  • the downstream part 3L is bonded to the upstream part 3U at the dividing surface P1 to constitute the impeller 3.
  • the downstream part 3L includes the downstream shroud 4L, the downstream blade segments 5L, and the hub 6.
  • the downstream shroud 4L is the downstream segment (lower segment in Fig. 1 ) of the shroud 4 divided in two at the dividing surface P1 and is bonded to the upstream shroud 4U at the dividing surface P1 to constitute the shroud 4.
  • the downstream shroud 4L integrally constitutes the downstream part 3L, together with the downstream blade segments 5L and the hub 6.
  • the downstream blade segments 5L are the downstream segments of the impeller blades 5 divided in two at the dividing surface P1 and are bonded to the upstream blade segments 5U at the dividing surface P1 to constitute the impeller blades 5.
  • the downstream blade segments 5L integrally constitute the downstream part, together with the downstream shroud 4L and the hub 6.
  • the hub 6 is rotatably supported by the rotating shaft 2 and is formed in a substantially conical shape whose diameter increases from the upstream to downstream sides along a fluid flow.
  • the impeller blades 5 are disposed on the outer circumferential surface of the hub 6 so as to extend radially outward.
  • FIGs. 3 and 4 are partial perspective views of the impeller, illustrating regions where a high stress occurs as the impeller is rotated.
  • the impeller 3 is divided into the upstream part 3U and the downstream part 3L at the dividing surface P1. Accordingly, the above high-stress regions R1, R2, and R3 are associated with the downstream part 3L, which is integrally formed.
  • the upstream part 3U and the downstream part 3L of the impeller 3 are separately formed (forming step).
  • the method used for forming the upstream part 3U and the downstream part 3L may be a known method such as casting, machining, or electrical discharge machining and is not particularly limited.
  • the upstream part 3U and the downstream part 3L formed separately are bonded at the dividing surface P1, thus producing the impeller 3 (bonding step).
  • the upstream part 3U and the downstream part 3L are bonded at the dividing surface P1 by diffusion bonding.
  • the downstream shroud 4L is placed with the axis of rotation L substantially vertical, in other words, with the dividing surface P1 substantially horizontal, and a bonding material is then applied over the dividing surface P1. Subsequently, as shown in Fig. 1 , the upstream part 3U is placed on the downstream part 3L, and diffusion bonding is performed by placing the upstream part 3U and the downstream part 3L in a high-temperature environment such as the interior of a furnace.
  • the bonding at the dividing surface P1 may be diffusion bonding, as described above, or may be brazing or welding and is not particularly limited.
  • the diffusion bonding is not limited to solid-phase diffusion bonding and may instead be liquid-phase diffusion bonding.
  • the centrifugal compressor 1 having the structure described above will be described.
  • the impeller 3 is rotated by the rotating shaft 2 to take a fluid from the upstream side (upper side in Fig. 1 ) into the space between the hub 6 and the shroud 4, in other words, the space in which the impeller blades 5 are disposed.
  • the intake fluid is then transferred to the downstream side (lateral direction in Fig. 1 ) along the wall surfaces of the hub 6 and the shroud 4 by the impeller blades 5.
  • the transferred fluid is discharged from the centrifugal compressor 1 after the kinetic energy thereof is partially converted to pressure by diffusers (not shown) of the centrifugal compressor 1.
  • the impeller 3 has smaller unremoved portions than an impeller fabricated by machining using a machining tool. This inhibits disruption of the fluid flow through the impeller 3, thus improving the performance of the centrifugal compressor 1.
  • the upstream part 3U and the downstream part 3L have smaller unremoved portions than in the case where the entire impeller 3 is integrally formed because they interfere with a machining tool over a narrower region. Accordingly, the impeller 3 having the upstream part 3U and the downstream part 3L bonded at the dividing surface P1 has smaller unremoved portions.
  • upstream blade segments 5U and the upstream shroud 4U are integrally formed and the downstream blade segments 5L, the downstream shroud 4L, and the hub 6 are integrally formed, sufficient strength is ensured in regions where a high stress occurs as the impeller 3 is rotated. This prevents damage to the impeller 3, thus improving the reliability of the centrifugal compressor 1.
  • the upstream part 3U and the downstream part 3L can be fabricated with higher precision than in a method in which impeller blades and a shroud are bonded, the impeller 3 having the two parts bonded and the centrifugal compressor 1 including the impeller 3 can be fabricated with higher precision. This improves the reliability and performance of the impeller 3 and the centrifugal compressor 1.
  • the downstream part 3L is placed with the dividing surface P1 substantially horizontal before the upstream part 3U and the downstream part 3L are bonded, a bonding failure can be prevented at the dividing surface.
  • the downstream part 3L is placed with the bonding surface, described above, substantially horizontal before the upstream part 3U and the downstream part 3L are bonded, so that the bonding material used for bonding cannot easily flow downward.
  • the bonding material is present substantially uniformly over the entire dividing surface P1, thus preventing a bonding failure due to insufficient bonding material.
  • FIG. 5 is a schematic diagram illustrating the structure of the impeller of the compressor according to this embodiment.
  • Fig. 6 is a schematic diagram illustrating the structures of the upstream and downstream parts of the impeller in Fig. 5 .
  • the same elements as those in the first embodiment are denoted by the same reference signs, and a description thereof will be omitted.
  • an impeller 13 of a centrifugal compressor (compressor) 11 of this embodiment includes an upstream part 13U and a downstream part 23L divided at a dividing surface (bonding surface) P2.
  • the upstream part 13U is bonded to the downstream part 13L at the dividing surface P2 to constitute the impeller 13.
  • the upstream part 13U includes a shroud 4 and upstream blade segments 5U.
  • the downstream part 13L is bonded to the upstream part 13U at the dividing surface P2 to constitute the impeller 13.
  • the downstream part 13L includes the downstream blade segments 5L and the hub 6.
  • the upstream part 13U and the downstream part 13L of the impeller 13 are separately formed (forming step).
  • the method used for forming the upstream part 13U and the downstream part 13L may be a known method such as casting or machining and is not particularly limited.
  • the bonding at the dividing surface P2 may be diffusion bonding, as described above, or may be brazing or welding and is not particularly limited.
  • the diffusion bonding is not limited to solid-phase diffusion bonding and may instead be liquid-phase diffusion bonding.
  • the impeller 13 has smaller unremoved portions than an impeller fabricated by machining using a machining tool. This inhibits disruption of the fluid flow through the impeller 13, thus improving the performance of the centrifugal compressor 11.
  • upstream blade segments 5U and the shroud 4 are integrally formed and the downstream blade segments 5L and the hub 6 are integrally formed, sufficient strength is ensured in regions where a high stress occurs as the impeller 13 is rotated, thus preventing damage to the impeller 13.
  • FIG. 7 is a schematic diagram illustrating the structure of the impeller of the compressor according to this embodiment.
  • Fig. 8 is a schematic diagram illustrating the structures of the upstream and downstream parts of the impeller in Fig. 7 .
  • the same elements as those in the first embodiment are denoted by the same reference signs, and a description thereof will be omitted.
  • an impeller 23 of a centrifugal compressor (compressor) 21 of this embodiment includes an upstream part 23U and a downstream part 23L divided at a dividing surface (bonding surface) P3.
  • the upstream part 23U is bonded to the downstream part 23L at the dividing surface P3 to constitute the impeller 23.
  • the upstream part 23U includes an upstream shroud 24U and upstream blade segments 25U.
  • the upstream shroud 24U is the upstream segment (upper segment in Fig. 8 ) of the shroud 4 divided in two at the dividing surface P3 and is bonded to a downstream shroud 24L at the dividing surface P3 to constitute the shroud 4.
  • the upstream blade segments 25U are the upstream segments of the impeller blades 5 divided in two at the dividing surface P3. Accordingly, the upstream blade segments 5U have portions bonded to the downstream blade segments 25L and portions bonded to the hub 6. In addition, the upstream blade segments 25U integrally constitute the upstream part 23U, together with the upstream shroud 24U.
  • the downstream part 23L is bonded to the upstream part 23U at the dividing surface P3 to constitute the impeller 23.
  • the downstream part 23L includes the downstream shroud 24L, the downstream blade segments 25L, and the hub 6.
  • the downstream shroud 24L is the downstream segment (lower segment in Fig. 8 ) of the shroud 4 divided in two at the dividing surface P3 and is bonded to the upstream shroud 24U at the dividing surface P3 to constitute the shroud 4.
  • downstream blade segments 25L are the downstream segments of the impeller blades 5 divided in two at the dividing surface P3 and are bonded to the upstream blade segments 25U at the dividing surface P3 to constitute the impeller blades 5.
  • the downstream blade segments 25L integrally constitute the downstream part 23U, together with the downstream shroud 24L and the hub 6.
  • the dividing surface P3 is a surface constituted by a portion extending in a direction substantially perpendicular to the axis of rotation L and dividing the impeller 3 and the shroud 4 and a portion extending radially inward so as to be inclined upward (upward in Fig. 7 ) along the bonding surface between the hub 6 and the impeller 3.
  • the dividing surface P1 is also the surface at which the upstream part 23U and the downstream part 23L are bonded.
  • the upstream part 23U and the downstream part 23L of the impeller 23 are separately formed (forming step).
  • the method used for forming the upstream part 23U and the downstream part 23L may be a known method such as casting, machining, or electrical discharge machining and is not particularly limited.
  • the bonding is performed by brazing in the portion of the dividing surface P3 where the upstream blade segments 23U and the downstream blade segments 25L are bonded.
  • the upstream part 23U and the downstream part 23L are bonded by brazing in the substantially horizontal portion of the dividing surface P3, that is, the portion of the dividing surface P3 substantially perpendicular to the axis of rotation L.
  • the bonding is performed by welding in the portion of the dividing surface P3 where the upstream blade segments 25U and the hub 6 are bonded.
  • the upstream part 23U and the downstream part 23L are bonded by welding in the inclined portion of the dividing surface P1.
  • the hub 6, which is integrally formed, has a higher strength than a segmented hub 6. It is preferable that the hub 6 have a higher strength because force acts thereon as the centrifugal compressor 1 is operated.
  • the brazing alloy can be prevented from leaking out, thus allowing stable bonding.
  • the bonding is performed by welding in the inclined portion of the dividing surface P3, a bonding failure due to leakage of a brazing alloy can be prevented.
  • the welded joint is limited by providing the brazed joint, which permits high bonding precision, the upstream part 23U and the downstream part 23L can be bonded with high precision.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP10738401.8A 2009-02-06 2010-01-15 Roue à aubes, compresseur et procédé de fabrication de roue à aubes Withdrawn EP2395246A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009025944A JP2010121612A (ja) 2008-10-23 2009-02-06 インペラ、圧縮機およびインペラの製造方法
PCT/JP2010/050401 WO2010090062A1 (fr) 2009-02-06 2010-01-15 Roue à aubes, compresseur et procédé de fabrication de roue à aubes

Publications (2)

Publication Number Publication Date
EP2395246A1 true EP2395246A1 (fr) 2011-12-14
EP2395246A4 EP2395246A4 (fr) 2018-01-24

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EP10738401.8A Withdrawn EP2395246A4 (fr) 2009-02-06 2010-01-15 Roue à aubes, compresseur et procédé de fabrication de roue à aubes

Country Status (3)

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EP (1) EP2395246A4 (fr)
CN (1) CN102203428B (fr)
WO (1) WO2010090062A1 (fr)

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EP2669042A1 (fr) * 2012-05-30 2013-12-04 Sulzer Markets and Technology AG Procédé de fabrication d'une pièce usinée à l'aide d'un dispositif de découpe rapide
US20140193268A1 (en) * 2013-01-09 2014-07-10 Fanuc Corporation Method of formation of impeller with shape defined by plurality of lines and such impeller
US11022135B2 (en) 2019-02-26 2021-06-01 Mitsubishi Heavy Industries Compressor Corporation Impeller and rotating machine
US11162505B2 (en) 2013-12-17 2021-11-02 Nuovo Pignone Srl Impeller with protection elements and centrifugal compressor

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JP5998544B2 (ja) * 2012-03-13 2016-09-28 アイシン精機株式会社 インペラの製造方法およびインペラ
KR101960714B1 (ko) * 2012-11-30 2019-03-22 한화파워시스템 주식회사 임펠러
JP6203867B2 (ja) * 2013-12-27 2017-09-27 本田技研工業株式会社 インペラ
CN105090104A (zh) * 2015-06-25 2015-11-25 海信（山东）空调有限公司 一种带斜向离心风扇的空调室外机及空调
CN107989823B (zh) * 2017-12-26 2023-12-01 北京伯肯节能科技股份有限公司 叶轮、离心压缩机及燃料电池系统
CN114258461B (zh) * 2019-08-13 2024-08-16 谷轮有限合伙公司 用于制造带护罩叶轮的方法、带护罩叶轮和压缩机
JP6982267B2 (ja) * 2020-05-08 2021-12-17 ダイキン工業株式会社 クローズドインペラ及びクローズドインペラの製造方法

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EP2669042A1 (fr) * 2012-05-30 2013-12-04 Sulzer Markets and Technology AG Procédé de fabrication d'une pièce usinée à l'aide d'un dispositif de découpe rapide
US20140193268A1 (en) * 2013-01-09 2014-07-10 Fanuc Corporation Method of formation of impeller with shape defined by plurality of lines and such impeller
US9416664B2 (en) * 2013-01-09 2016-08-16 Fanuc Corporation Method of formation of impeller with shape defined by plurality of lines and such impeller
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CN102203428B (zh) 2015-11-25
EP2395246A4 (fr) 2018-01-24
WO2010090062A1 (fr) 2010-08-12

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