EP3406910B1 - Hélice de ventilateur centrifuge - Google Patents

Hélice de ventilateur centrifuge Download PDF

Info

Publication number
EP3406910B1
EP3406910B1 EP17741322.6A EP17741322A EP3406910B1 EP 3406910 B1 EP3406910 B1 EP 3406910B1 EP 17741322 A EP17741322 A EP 17741322A EP 3406910 B1 EP3406910 B1 EP 3406910B1
Authority
EP
European Patent Office
Prior art keywords
shroud
portions
blade
end portions
axial end
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.)
Active
Application number
EP17741322.6A
Other languages
German (de)
English (en)
Other versions
EP3406910A4 (fr
EP3406910A1 (fr
Inventor
Takashi Kashihara
Takahiro Yamasaki
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.)
Daikin Industries Ltd
Original Assignee
Daikin 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
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP3406910A1 publication Critical patent/EP3406910A1/fr
Publication of EP3406910A4 publication Critical patent/EP3406910A4/fr
Application granted granted Critical
Publication of EP3406910B1 publication Critical patent/EP3406910B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing

Definitions

  • the present invention relates to a centrifugal fan impeller, and particularly a centrifugal fan impeller equipped with plural blades that are annularly disposed around a rotational axis and a main plate and a shroud that are disposed so as to sandwich the rotational axis direction sides of the blades, with blade axial end portions, which are end portions of the blades on one side in the rotational axis direction, and the shroud being welded to each other.
  • centrifugal fans are sometimes used for the purpose of sucking in, supplying, and exhausting air.
  • An impeller configuring the centrifugal fan mainly has plural blades that are annularly disposed around a rotational axis and a main plate and a shroud that are disposed so as to sandwich the rotational axis direction sides of the blades.
  • centrifugal fan impellers where blade axial end portions, which are end portions of the blades on one side in the rotational axis direction, and the shroud are welded to each other.
  • the blade axial end portions along the entire chord length direction and the corresponding sections of the shroud are given staircase shapes, and flat surfaces of the staircase shapes are welded to each other.
  • EP 3 399 195 A1 discloses an impeller which includes main plate-side welded portions between main plate-side blade axial ends and a main plate and includes shroud-side welded portions between shroud-side blade axial ends and a shroud.
  • Main plate-side welding holes that are recesses extending through the main plate to portions of the main plate-side blade axial ends are provided on the main plate welded portions, while shroud-side welding holes that are recesses extending through the shroud to the shroud-side blade axial ends are provided on the shroud-side blade axial ends.
  • JP 2007-120445 A discloses a turbo fan which is molded from thermoplastic resin so that a fan body, which is integrally molded in a state that a plurality of blades are erectly provided on the periphery of a boss around a main plate having at a central part the boss fixed to a rotary shaft of a motor, and a shroud forming a suction guide wall are fixed into a one body.
  • a concave fitting portion which has at a bottom a flat face perpendicular to the rotary shaft, is formed on a blade tip side of each blade.
  • a convex fitting portion which extends parallel to the rotary shaft and has at a bottom a flat face perpendicular to the rotary shaft, is formed at a position of the shroud opposite to each blade of the fan body, and at least the concave fitting portions and the convex fitting portions are closely contacted and integrally joined.
  • JP 2005 155510 A and JP 2015 86827 A it is easy for the airflow in the vicinity of the shroud to be obstructed by the staircase shapes formed in the blades and the shroud, which sometimes leads to the occurrence of a reduction in blowing performance and an increase in blowing noise.
  • a centrifugal fan impeller according to the present invention is defined by claim 1.
  • the centrifugal fan impeller has plural blades that are annularly disposed around a rotational axis and a main plate and a shroud that are disposed so as to sandwich the rotational axis direction sides of the blades, with blade axial end portions, which are end portions of the blades on one side in the rotational axis direction, and the shroud being welded to each other.
  • the shroud has a curved plate-like shroud curved plate portion curved in such a way that its diameter becomes smaller heading away from the blades in the rotational axis direction and flat plate-like shroud flat plate portions formed in correspondence to just parts of the sections of the shroud that oppose the blade axial end portions.
  • blade flat surfaces being flat surfaces that follow the shroud flat plate portions
  • blade curved surfaces being curved surfaces that follow the shroud curved plate portion.
  • Welded portions resulting from the blade flat surfaces and the shroud flat plate portions being welded to each other are formed between the blade axial end portions and the shroud.
  • the centrifugal fan impeller employs a structure where the sections at which the blades and the shroud oppose each other are largely left as a curved plate portion (the shroud curved plate portion) and curved surfaces (the blade curved surfaces) and where flat plate portions (the shroud flat plate portions) and flat surfaces (the blade flat surfaces) are formed, and welded to each other, in just parts of the sections at which the blades and the shroud oppose each other.
  • the impeller employs a conventional structure where staircase shapes are formed in the blades and the shroud and welded to each other, it becomes difficult for the airflow in the vicinity of the shroud to be obstructed.
  • the airflow in the vicinity of the shroud can be improved to thereby achieve an improvement in blowing performance and a reduction in blowing noise.
  • the blade flat surfaces are disposed in the vicinities of chord length direction centers of the blade axial end portions.
  • the welding of the blades and the shroud to each other is performed at the sections in the vicinities of the chord length direction centers of the blade axial end portions, so in comparison to a case where the welding of the blades and the shroud to each other is performed at the sections on the leading edge sides and/or the trailing edge-side sections of the blade axial end portions, robust welding becomes possible.
  • Leading edge-side recessed portions into which leading edge-side sections of the blade axial end portions are insertable, are formed in the shroud in such a way as to follow the blade curved surfaces.
  • the leading edge-side recessed portions into which the leading edge-side sections of the blade axial end portions are insertable, are formed in the shroud. For this reason, disruption of the airflow caused by gaps between the leading edge-side sections of the blade axial end portions and the shroud can be curbed.
  • the leading edge-side recessed portions are formed in the shroud, there is an adverse impact on blowing performance and blowing noise, but here, as described above, by forming the leading edge-side recessed portions in such a way as to follow the blade curved surfaces, the adverse impact on blowing performance and blowing noise caused by the leading edge-side recessed portions is curbed.
  • leading edge-side recessed portions project from the shroud curved plate portion in such a way as to form curved plate portions parallel to the shroud curved plate portion.
  • trailing edge-side raised portions are formed in the shroud in such a way as to line trailing edge-side sections of the blade axial end portions.
  • the flat plate portions (the shroud flat plate portions) and the flat surfaces (the blade flat surfaces) are formed, and welded to each other, in just parts of the sections at which the blades and the shroud oppose each other, when the welding of the blades and the shroud to each other is performed at the sections in the vicinities of the chord length direction centers of the blade axial end portions, there is the concern that gaps will form between the trailing edge-side sections of the blade axial end portions and the shroud curved plate portion because of, for example, strain during the molding of the blades and the shroud.
  • the trailing edge-side raised portions are formed in the shroud in such a way as to line the trailing edge-side sections of the blade axial end portions. For this reason, leakage of the airflow caused by gaps between the trailing edge-side sections of the blade axial end portions and the shroud curved plate portion can be curbed.
  • the trailing edge-side raised portions are disposed in correspondence to just positive pressure surface sides of the blade axial end portions.
  • FIG. 1 an external perspective view (with a ceiling being omitted) of an air conditioning apparatus 1 in which a centrifugal fan 4 equipped with an impeller 8 pertaining to an embodiment which is not belonging to the present invention is employed.
  • the air conditioning apparatus 1 here is an air conditioning apparatus installed in a ceiling and mainly has a casing 2, which houses various constituent devices inside, and a decorative panel 3, which is disposed on the lower side of the casing 2.
  • the casing 2 of the air conditioning apparatus 1 is a box-like member whose undersurface is open. As shown in FIG. 2 (a general side sectional view of the air conditioning apparatus 1), the casing 2 is inserted and disposed in an opening formed in a ceiling of an air-conditioned room. Additionally, the decorative panel 3 has an air inlet 3a, which is disposed in the substantial center of the decorative panel 3 in order to suck the air in the air-conditioned room into the casing 2, and air outlets 3b, which are disposed so as to surround the outer periphery of the air inlet 3a in order to blow the air out from the casing 2 to the air-conditioned room. The decorative panel 3 is disposed in such a way as to be fitted into the opening in the ceiling.
  • centrifugal fan 4 Mainly disposed inside the casing 2 are a centrifugal fan 4 that sucks the air in the air-conditioned room into the casing 2 through the air inlet 3a in the decorative panel 3 and blows the air out in an outer peripheral direction, a heat exchanger 5 that surrounds the outer periphery of the centrifugal fan 4, and a bell mouth 6 for guiding the air sucked in from the air inlet 3a to the centrifugal fan 4.
  • the centrifugal fan 4 has a fan motor 7, which is provided in the substantial center of a top plate 2a of the casing 2, and the impeller 8, which is coupled to and driven to rotate by the fan motor 7.
  • the air conditioning apparatus 1 provided with the centrifugal fan 4 is not limited to an apparatus installed in a ceiling and may also be another type. Furthermore, the configuration of the impeller 8 will be described later.
  • FIG. 3 is an external perspective view of the impeller 8.
  • FIG. 4 is a view seen in the direction of arrow A in FIG. 3 (with part of a shroud 80 being excluded).
  • FIG. 5 is a view seen in the direction of arrow B in FIG. 3 (with part of a main plate 60 being excluded).
  • FIG. 6 is an enlarged view of portion C in FIG. 4 .
  • FIG. 7 is an enlarged view of portion D in FIG. 5 .
  • FIG. 8 is a view showing a cross section along line IV-IV of FIG. 7 .
  • FIG. 9 is a view showing a cross section along line I-I of FIG. 6 .
  • FIG. 10 is a view showing a cross section along line II-II of FIG. 6 .
  • FIG. 11 is a view showing a cross section along line III-III of FIG. 6 .
  • the impeller 8 mainly has a disc-shaped main plate 60 that is coupled to the fan motor 7, plural (here, seven) blades 70 that are annularly disposed around a rotational axis O of the main plate 60 on the side of the main plate 60 opposite the fan motor 7 side, and an annular shroud 80 that is disposed so as to sandwich the plural blades 70 between itself and the main plate 60 in the direction of the rotational axis O.
  • R denotes the rotational direction of the impeller 8.
  • the main plate 60 is a member made of resin having a substantially circular truncated cone-shaped hub portion 61 formed in the central portion thereof so as to project toward the air inlet 3a side.
  • Formed in the hub portion 61 are, for example, plural (here, three) cooling-use air holes 62 being long holes formed adjacent to each other on a circle concentric with the main plate 60.
  • the section of the main plate 60 on the outer peripheral side of the hub portion 61 is an annular flat plate-like flat plate portion 63.
  • the shroud 80 is a bell-shaped member made of resin that projects while curving toward the air inlet 3a side heading from its outer peripheral portion toward an opening in its central portion.
  • the curved plate-like section of the shroud 80 that curves in such a way that its diameter becomes smaller heading away from the blades 70 in the rotational axis O direction (i.e., heading toward the air inlet 3a side) is a shroud curved plate portion 81.
  • the blades 70 here are members made of resin molded separately from the main plate 60 and the shroud 80. End portions of the blades 70 on one side in the rotational axis O direction are main plate-side blade axial end portions 71 disposed opposing the main plate 60 and are secured to the main plate 60. End portions of the blades 70 on the other side in the rotational axis O direction are shroud-side blade axial end portions 72 disposed opposing the shroud 80 and are secured to the shroud 80.
  • the blades 70 have a shape where, when the impeller 8 is viewed along the rotational axis O direction, the main plate-side blade axial end portions 71 are rearwardly inclined beyond the shroud-side blade axial end portions 72.
  • the blades 70 are hollow blades mainly having blade bodies 73 and blade covers 74, and the blade covers 74 are attached to the blade bodies 73 by being fitted therein and form hollow spaces S between themselves and the blade bodies 73, whereby the blades 70 are reduced in weight.
  • the hollowing of the blades 70 may also be accomplished by blow molding, for example, rather than being accomplished by a structure where the two members 73 and 74 are fitted together.
  • concavo-convex shapes for improving the performance of the centrifugal fan 4 are formed in the trailing edge portions of the blades 70, but in a case where sufficient performance can be obtained without forming the concavo-convex shapes, it is not invariably necessary to form the concavo-convex shapes.
  • the blades 70 are members separate from the main plate 60 and the shroud 80, but the blades 70 are not limited to this and may also be molded integrally with the main plate 60. In this case, it suffices simply to secure the blades 70 to the shroud 80.
  • the securing of the main plate-side blade axial end portions 71 of the blades 70 to the main plate 60 is performed by welding the main plate-side blade axial end portions 71 and the main plate 60 to each other, and the welded sections form main plate-side welded portions 8a.
  • a method that applies ultrasonic waves to the flat plate portion 63 of the main plate 60 and flat surfaces 71a of the main plate-side blade axial end portions 71 of the blades 70 to thereby weld the flat plate portion 63 and the flat surfaces 71a to each other (ultrasonic welding) is employed.
  • the method of welding the blades 70 to the main plate 60 is not limited to ultrasonic welding so long as it is a method of welding the flat plate portion 63 and the flat surfaces 71a to each other, and another welding method may also be employed, such as, for example, employing a method that applies a laser to the flat plate portion 63 and the flat surfaces 71a to thereby weld the flat plate portion 63 and the flat surfaces 71a to each other (laser welding).
  • the securing of the shroud-side blade axial end portions 72 of the blades 70 to the shroud 80 is performed by welding the shroud-side blade axial end portions 72 and the shroud 80 to each other, and the welded sections form shroud-side welded portions 8b.
  • flat plate-like shroud flat plate portions 82 are formed in the shroud 80 in correspondence to just parts of the sections of the shroud 80 that oppose the shroud-side blade axial end portions 72, and the shroud-side welded portions 8b are disposed in the shroud flat plate portions 82.
  • the shroud 80 is largely configured by the curved plate-like shroud curved plate portion 81 curved in such a way that its diameter becomes smaller heading away from the blades 70 in the rotational axis O direction, but the flat plate-like flat plate portions 82 perpendicular to the rotational axis O direction are formed in just parts of the sections of the shroud curved plate portion 81 corresponding to the shroud-side blade axial end portions 72.
  • blade flat surfaces 72a being flat surfaces that follow the shroud flat plate portions 82 and blade curved surfaces 72b and 72c being curved surfaces that follow the shroud curved plate portion 81.
  • the shroud-side welded portions 8b are formed as a result of the blade flat surfaces 72a and the shroud flat plate portions 82 being welded to each other.
  • a method that applies ultrasonic waves to the shroud flat plate portions 82 of the shroud 80 and the blade flat surfaces 72a of the shroud-side blade axial end portions 72 of the blades 70 to thereby weld the shroud flat plate portions 82 and the blade flat surfaces 72a to each other (ultrasonic welding) is employed.
  • the method of welding the blades 70 to the shroud 80 is not limited to ultrasonic welding so long as it is a method of welding the shroud flat plate portions 82 and the blade flat surfaces 72a to each other, and another welding method may also be employed, such as, for example, employing a method that applies a laser to the shroud flat plate portions 82 and the blade flat surfaces 72a to thereby weld the shroud flat plate portions 82 and the blade flat surfaces 72a to each other (laser welding).
  • the blade flat surfaces 72a are disposed so as to correspond to the vicinities of chord length direction centers of the shroud-side blade axial end portions 72.
  • the shroud flat plate portions 82 are also disposed in the vicinities of the chord length direction centers of the shroud-side blade axial end portions 72.
  • shroud step portions 83 that interconnect the shroud flat plate portions 82 and the shroud curved plate portion 81 are formed in the shroud 80 on the peripheral sections of the shroud flat plate portions 82, and blade stepped portions 72d that can fit together with the shroud stepped portions 83 and interconnect the blade curved surfaces 72b and 72c are formed in the shroud-side blade axial end portions 72 on the peripheral sections of the blade flat surfaces 72a.
  • the blade stepped portions 77 are configured to fit together with the shroud stepped portions 83 in a state in which the shroud flat plate portions 82 and the blade flat plate portions 72a lie on top of each other in the rotational axis O direction. That is, the blades 70 are positioned in predetermined positions on the shroud 80 because of the shroud stepped portions 83 and the blade stepped portions 72d.
  • the impeller 8 of the centrifugal fan 4 has the following characteristics in relation to the structure in the vicinity of the shroud-side welded portions 8b formed between the shroud-side blade axial end portions 72 of the blades 70 and the shroud 80.
  • the shroud 80 has the curved plate-like shroud curved plate portion 81 and the flat plate-like shroud flat plate portions 82 formed in correspondence to just parts of the sections of the shroud 80 that oppose the blade axial end portions 72.
  • the blade flat surfaces 72a being flat surfaces that follow the shroud flat plate portions 82
  • the blade curved surfaces 72b and 72c being curved surfaces that follow the shroud curved plate portion 81.
  • the welded portions 8b resulting from the blade flat surfaces 72a and the shroud flat plate portions 82 being welded to each other are formed between the blade axial end portions 72 and the shroud 80.
  • the impeller 8 employs a structure where the sections at which the blades 70 and the shroud 80 oppose each other are largely left as a curved plate portion (the shroud curved plate portion 81) and curved surfaces (the blade curved surfaces 72b and 72c) and where flat plate portions (the shroud flat plate portions 82) and flat surfaces (the blade flat surfaces 72a) are formed, and welded to each other, in just parts of the sections at which the blades 70 and the shroud 80 oppose each other.
  • the airflow in the vicinity of the shroud 80 can be improved to thereby achieve an improvement in blowing performance and a reduction in blowing noise.
  • the welding of the blades 70 and the shroud 80 to each other is performed at the sections in the vicinities of the chord length direction centers of the blade axial end portions 72. For this reason, in comparison to a case where the welding of the blades 70 and the shroud 80 to each other is performed at the leading edge-side sections and/or the trailing edge-side sections of the blade axial end portions 72, robust welding becomes possible.
  • the flat plate portions (the shroud flat plate portions 82) and the flat surfaces (the blade flat surfaces 72a) are formed, and welded to each other, in just parts of the sections at which the blades 70 and the shroud 80 oppose each other, when the welding of the blades 70 and the shroud 80 to each other is performed at the sections in the vicinities of the chord length direction centers of the blade axial end portions (see FIG. 9 ), there is the concern that gaps will form between the leading edge-side sections of the shroud-side blade axial end portions 72 and the shroud curved plate portion 81 because of, for example, strain during the molding of the blades 70 and the shroud 80 (see FIG. 10 ).
  • gaps at the leading edge-side sections of the shroud-side blade axial end portions 72 cause a disruption in the airflow heading through the opening in the central portion of the shroud 80 toward the leading edges of the blades 70, so there is the concern that this will increase blowing noise.
  • leading edge-side recessed portions 84 into which the leading edge-side sections of the shroud-side blade axial end portions 72 are insertable, are formed in the shroud 80. For this reason, disruption of the airflow caused by gaps between the leading edge-side sections of the shroud-side blade axial end portions 72 and the shroud curved plate portion 81 can be curbed.
  • leading edge-side recessed portions 84 are formed in the shroud 80, there is an adverse impact on blowing performance and blowing noise, but here, by forming the leading edge-side recessed portions 84 in such a way as to follow the blade curved surfaces 72b, the adverse impact on blowing performance and blowing noise caused by the leading edge-side recessed portions 84 is curbed.
  • the leading edge-side recessed portions 84 project from the shroud curved plate portion 81 toward the side opposite the blade 70 side in the rotational axis O direction in such a way as to form curved plate portions parallel to the shroud curved plate portion 81.
  • a seal material may be disposed between the leading edge-side sections of the shroud-side blade axial end portions 72 and the leading edge-side recessed portions 84 in order to further enhance the effect of curbing disruption of the airflow caused by gaps between the leading edge-side sections of the shroud-side blade axial end portions 72 and the shroud curved plate portion 81. Furthermore, in a case where it is possible to satisfy the blowing performance and the blowing noise required of the impeller 8 without forming the leading edge-side recessed portions 84, it is alright not to form the leading edge-side recessed portions 84.
  • gaps at the trailing edge-side sections of the shroud-side blade axial end portions 72 cause some of the airflow heading along the positive pressure surfaces of the blades 70 from the leading edges to the trailing edges to leak midway from the positive pressure surface sides to the negative pressure surface sides, so there is the concern that this will reduce blowing performance.
  • trailing edge-side raised portions 85 are formed in the shroud 80 in such a way as to line the trailing edge-side sections of the shroud-side blade axial end portions 72. For this reason, leakage of the airflow caused by gaps between the trailing edge-side sections of the shroud-side blade axial end portions 72 and the shroud curved plate portion 81 can be curbed.
  • the trailing edge-side raised portions 85 are disposed in correspondence to just the positive pressure surface sides of the shroud-side blade axial end portions 72.
  • the present invention is widely applicable to a centrifugal fan impeller equipped with plural blades that are annularly disposed around a rotational axis and a main plate and a shroud that are disposed so as to sandwich the rotational axis direction sides of the blades, with blade axial end portions, which are end portions of the blades on one side in the rotational axis direction, and the shroud being welded to each other.

Landscapes

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

Claims (4)

  1. Hélice (8) de ventilateur centrifuge (4) comprenant :
    plusieurs pales (70) qui sont disposées en anneau autour d'un axe de rotation ; et
    une plaque principale (60) et un carénage (80) qui sont disposés de sorte à prendre en sandwich les côtés de direction d'axe de rotation des pales,
    des portions d'extrémité axiale de pale (72), qui sont des portions d'extrémité des pales sur un côté dans la direction d'axe de rotation, et le carénage étant soudés les uns aux autres,
    dans laquelle
    le carénage présente une portion de plaque courbée de carénage de type plaque courbée (81) courbée de telle manière que son diamètre devienne plus petit en s'écartant des pales dans la direction d'axe de rotation et des portions de plaque plate de carénage de type plaque plate (82) formées en correspondance uniquement de parties des sections du carénage qui s'opposent aux portions d'extrémité axiale de pale,
    dans les portions d'extrémité axiale de pale sont formées des surfaces plates de pale (72a) qui sont des surfaces plates qui suivent les portions de plaque plate de carénage et des surfaces courbées de pale (72b, 72c) qui sont des surfaces courbées qui suivent la portion de plaque courbée de carénage, et
    des portions soudées (8b) résultant des surfaces plates de pale et les portions de plaque plate de carénage qui sont soudées les unes aux autres sont formées entre les portions d'extrémité axiale de pale et le carénage,
    dans lequel les surfaces plates de pale sont disposées à proximité des centres de direction de longueur de corde des portions d'extrémité axiale de pale,
    caractérisée en ce que :
    des portions évidées côté bord d'attaque (84), dans lesquelles des sections côté bord d'attaque des portions d'extrémité axiale de pale sont insérables, sont formées dans le carénage de manière à suivre les surfaces courbées de pale.
  2. Hélice de ventilateur centrifuge selon la revendication 1, dans laquelle les portions évidées côté bord d'attaque font saillie de la portion de plaque courbée de carénage de manière à former des portions de plaque courbée parallèlement à la portion de plaque courbée de carénage.
  3. Hélice de ventilateur centrifuge selon la revendication 1 ou 2, dans laquelle des portions relevées côté bord de fuite (85) sont formées dans le carénage de manière à revêtir des sections côté bord de fuite des portions d'extrémité axiale de pale.
  4. Hélice de ventilateur centrifuge selon la revendication 3, dans laquelle les portions relevées côté bord de fuite sont disposées en correspondance uniquement des côtés de surface de pression positive des portions d'extrémité axiale de pale.
EP17741322.6A 2016-01-18 2017-01-13 Hélice de ventilateur centrifuge Active EP3406910B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016007181A JP6314998B2 (ja) 2016-01-18 2016-01-18 遠心ファンの羽根車
PCT/JP2017/001105 WO2017126444A1 (fr) 2016-01-18 2017-01-13 Hélice de ventilateur centrifuge

Publications (3)

Publication Number Publication Date
EP3406910A1 EP3406910A1 (fr) 2018-11-28
EP3406910A4 EP3406910A4 (fr) 2019-01-02
EP3406910B1 true EP3406910B1 (fr) 2019-10-16

Family

ID=59361620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17741322.6A Active EP3406910B1 (fr) 2016-01-18 2017-01-13 Hélice de ventilateur centrifuge

Country Status (5)

Country Link
EP (1) EP3406910B1 (fr)
JP (1) JP6314998B2 (fr)
CN (1) CN108474389B (fr)
ES (1) ES2765859T3 (fr)
WO (1) WO2017126444A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016111830A1 (de) * 2016-06-28 2017-12-28 Ebm-Papst Mulfingen Gmbh & Co. Kg Gebläseradscheibe und Gebläserad
EP3647603A1 (fr) 2018-10-31 2020-05-06 Carrier Corporation Agencement de roue centrifuge d'un ventilateur pour réduire le bruit
CN112824685B (zh) * 2019-11-21 2022-08-09 泛仕达机电股份有限公司 一种带有提效装置的离心叶轮

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605852A1 (de) * 1986-02-22 1987-08-27 Gebhardt Gmbh Wilhelm Laufrad fuer einen radialventilator
JPH0237296U (fr) * 1988-09-05 1990-03-12
JP3092554B2 (ja) * 1997-09-30 2000-09-25 ダイキン工業株式会社 遠心送風機及びその製造方法並びに該遠心送風機を備えた空気調和機
JP3391318B2 (ja) * 1999-11-16 2003-03-31 ダイキン工業株式会社 遠心ファン及び該ファンを備えた空気調和機
JP4432474B2 (ja) 2003-11-27 2010-03-17 ダイキン工業株式会社 遠心送風機の羽根車及びそれを備えた遠心送風機
JP2006017063A (ja) * 2004-07-05 2006-01-19 Matsushita Electric Ind Co Ltd 送風機
JP5007457B2 (ja) * 2005-10-31 2012-08-22 三菱電機株式会社 ターボファン
JP4902718B2 (ja) * 2009-10-07 2012-03-21 三菱電機株式会社 遠心送風機および電気掃除機
JP6341637B2 (ja) * 2013-06-14 2018-06-13 三菱電機株式会社 遠心送風機の製造方法
JP6001520B2 (ja) * 2013-11-01 2016-10-05 日清紡メカトロニクス株式会社 ターボファンの製造方法
BR112018011912B1 (pt) * 2015-12-28 2022-11-29 Daikin Industries, Ltd Método e aparelho para fabricar um impulsor de um ventilador centrifugo
JP6056953B1 (ja) * 2015-12-28 2017-01-11 ダイキン工業株式会社 遠心ファンの羽根車の製造装置
JP6056952B1 (ja) * 2015-12-28 2017-01-11 ダイキン工業株式会社 遠心ファンの羽根車及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3406910A4 (fr) 2019-01-02
JP2017129024A (ja) 2017-07-27
WO2017126444A1 (fr) 2017-07-27
CN108474389B (zh) 2019-07-09
BR112018013261A2 (pt) 2018-12-04
ES2765859T3 (es) 2020-06-11
EP3406910A1 (fr) 2018-11-28
JP6314998B2 (ja) 2018-04-25
CN108474389A (zh) 2018-08-31

Similar Documents

Publication Publication Date Title
US8007240B2 (en) Impeller of centrifugal fan and centrifugal fan disposed with the impeller
US20070201976A1 (en) Impeller Of Multiblade Fan And Multiblade Fan Having The Same
JP5728209B2 (ja) 遠心式ファン
EP3034885B1 (fr) Ventilateur centrifuge et climatiseur pourvu de celui-ci
EP3406910B1 (fr) Hélice de ventilateur centrifuge
KR101876030B1 (ko) 소음저감 및 바람 유도 구조를 갖는 송풍기
WO2010047242A1 (fr) Machine de moulage pour ventilateur, soufflante et roue à aubes à écoulement traversant
WO2014141613A1 (fr) Soufflerie d'air
KR20080003444A (ko) 원심 송풍기와 이를 이용한 공기 조화기
JP2018132012A (ja) 電動送風機および電動掃除機、ならびにインペラの製造方法
JP5041446B2 (ja) 貫流ファン、送風機および羽根車の成形機
KR20030018460A (ko) 터보팬
JP5030115B2 (ja) 貫流ファン、送風機および羽根車の成形機
JP2014139412A (ja) 多翼遠心ファン及びこれを備えた多翼遠心送風機
JP4512352B2 (ja) パイプファン
JP4857495B2 (ja) 多翼送風機の羽根車及びそれを備えた多翼送風機
JP2003035293A (ja) 遠心送風機の羽根車及びそれを備えた遠心送風機
JP2002202093A (ja) 遠心送風機及びこれを備えた車両用空調装置
WO2003002873A1 (fr) Impulseur pour soufflante centrifuge et soufflante centrifuge dotee dudit impulseur
KR20120023319A (ko) 공기조화기용 터보팬
JP2011064096A (ja) 電動送風機及びこれを用いた電気掃除機
JP5269025B2 (ja) 遠心ファン及びこれを備えた空気調和機の室内機
JP2012202263A (ja) シロッコファン用羽根車及びシロッコファン
JP7476735B2 (ja) 遠心送風機
JP4736253B2 (ja) 多翼送風機の羽根車及びそれを備えた多翼送風機

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20180810

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20181205

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 29/66 20060101ALI20181128BHEP

Ipc: F04D 29/30 20060101ALI20181128BHEP

Ipc: F04D 29/28 20060101AFI20181128BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190621

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602017007911

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1191549

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191115

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20191016

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1191549

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200217

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200116

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200117

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200224

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2765859

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20200611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602017007911

Country of ref document: DE

PG2D Information on lapse in contracting state deleted

Ref country code: IS

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200216

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20200717

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191016

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230525

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20231130

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231212

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20240202

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20231128

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20240111

Year of fee payment: 8

Ref country code: IT

Payment date: 20231212

Year of fee payment: 8