WO2013180296A1 - Soufflante - Google Patents

Soufflante Download PDF

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Publication number
WO2013180296A1
WO2013180296A1 PCT/JP2013/065282 JP2013065282W WO2013180296A1 WO 2013180296 A1 WO2013180296 A1 WO 2013180296A1 JP 2013065282 W JP2013065282 W JP 2013065282W WO 2013180296 A1 WO2013180296 A1 WO 2013180296A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
serration
blower
flow
airflow
Prior art date
Application number
PCT/JP2013/065282
Other languages
English (en)
Japanese (ja)
Inventor
勝 神谷
英樹 大矢
吉田　憲司
Original Assignee
株式会社デンソー
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 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE201311002698 priority Critical patent/DE112013002698T5/de
Priority to CN201380027931.4A priority patent/CN104364532B/zh
Priority to US14/404,259 priority patent/US20150152875A1/en
Publication of WO2013180296A1 publication Critical patent/WO2013180296A1/fr

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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
    • F04D29/30—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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting 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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade

Definitions

  • the present invention relates to an axial blower, a centrifugal blower, a mixed flow blower (Diagonal® Flow® Fan), and the like, and more particularly, to a fan blade structure that can suppress air flow disturbance and reduce noise.
  • Patent Document 1 Axial blowers and the like have been required to have air blowing performance and low noise.
  • a plurality of triangular protrusions hereinafter referred to as serrations
  • serrations are provided in a saw-like shape in the chord direction of the entire leading edge of the wing, thereby reducing rotational noise by the blower fan. What has been done is disclosed.
  • the flow of airflow near the blade surface of the blower varies greatly depending on the part, and the flow velocity is higher toward the outer peripheral side in the radial direction of the blower fan.
  • the direction of airflow varies greatly depending on the wing (Forward Swept Wing) and swept wing (Sweptback Wing). That is, the forward wing has an axial flow that gathers at the blade center, and the backward wing has a diagonal flow toward the outer periphery of the blade. Furthermore, a backflow that wraps from the pressure surface to the suction surface side also occurs at the blade tip.
  • Patent Document 1 With respect to such a change in the flow of airflow due to the blade portion, the conventional technology of Patent Document 1 does not adequately correspond to the flow of airflow, and a sufficient noise reduction effect is obtained. I could't. In addition, a reduction in air volume may occur, resulting in an increase in driving torque and a decrease in efficiency.
  • the present invention provides a blower that effectively reduces fan noise while preventing a reduction in air volume.
  • the invention of claim 1 is directed to a drive motor (300), a hub (4) attached to the drive motor (300), and a plurality of hubs (4).
  • a blower (10) comprising a blower fan (1) having a blade (3), wherein a plurality of blades along the blade leading edge (6) are provided on the blade leading edge (6) of the blade (3).
  • the air blower is provided with serrations composed of triangular protrusions, and the pitch, height, or direction of the serrations is changed in accordance with the flow of airflow at the radial position of the blower fan (1).
  • the invention of claim 10 is directed to a blower fan (4) having a hub (4) attached to a drive machine (300) and a plurality of blades (3) provided on the hub (4). 1), wherein the blade (3) includes a first portion of a blade leading edge portion of the blade having a first distance in a radial direction from a rotation center (Q) of the blade (3), and the blade A second portion of the blade leading edge portion of the blade having a second distance in the radial direction from the rotation center of (3), and the blade leading edge portion (6) of the blade (3) A first hypotenuse (3a) that is inclined with respect to the flow direction, and a second hypotenuse (3b) that is inclined in a different direction from the first hypotenuse (3a) with respect to the flow direction of the airflow.
  • the blade (3) includes a first portion of a blade leading edge portion of the blade having a first distance in a radial direction from a rotation center (Q) of the blade (3), and the blade A second portion of the blade leading edge portion of the blade
  • It is a blower fan.
  • subjected above is an example which shows a corresponding relationship with the specific embodiment as described in embodiment mentioned later.
  • FIG. 4 is a cross-sectional view of the blade of the simulation of FIG. 3. It is explanatory drawing for description of a general axial-flow fan.
  • FIG. 6B is a cross-sectional view developed along line AA in FIG. 6A. It is explanatory drawing explaining the positive pressure surface, negative pressure surface, etc. of the braid
  • the blower 10 is a so-called electric blower in which the blower fan 1 is disposed in a shroud 200 and is rotationally driven by a drive motor (electric motor) 300.
  • the blower 10 is fixed to the engine side of the automotive radiator by attachment portions 250 provided in the vicinity of the four corners of the shroud 200, and blows cooling air to the core portion of the radiator.
  • the outer shape of the shroud 200 has a rectangular shape corresponding to the core portion of the radiator, and an annular shroud ring portion 210 that encloses the blower fan 1 at the outer periphery is formed at the approximate center thereof.
  • the shroud ring portion 210 is provided on the shroud 200 so as to be located on the radially outer side of the ring 2 of the blower fan 1. In this embodiment, the case where there is no ring 2 of the ventilation fan 1 may be sufficient.
  • the blower 10 and the blade 3 to be described later are not limited to automobile radiators, and may be applied to general industrial use. Although mainly the axial flow fan is described, the same effect can be obtained with a centrifugal blower, a mixed flow blower, and a reflux blower.
  • the drive motor 300 is not necessarily limited to an electric motor.
  • an air guide part 220 that extends toward the windward side of the blower fan 1 is formed.
  • a circular motor holding portion 230 is formed at the center of the shroud ring portion 210, and the motor holding portion 230 is radially extended radially outward by a plurality of motor stay portions 240 connected to the shroud ring portion 210. It is supported.
  • the electric motor 300 is fixed to the motor holding unit 230, and the shaft of the electric motor 300 and the hub 4 (see FIG. 2) of the blower fan 1 are fixed.
  • the blower 10 includes the blower fan 1 and the electric motor 300.
  • the hub 4 of the blower fan 1 has a cylindrical shape, and a plurality of blades 3 are provided radially.
  • chord (Cord Line) C, the pressure surface, the suction surface, the angle of attack (Angle of Attack) ⁇ , the lift force (Lift), etc. of the blade 3 are the same as the general definitions as shown in FIGS. .
  • An airfoil whose outer peripheral blade tip warps backward with respect to the rotational direction of the blower fan 1 is called a retreating blade, and the outer peripheral blade tip warps forward with respect to the rotational direction.
  • the wing type is called the forward wing.
  • a plurality of serrations are formed on the leading edge of the blade 3.
  • the serration has a first hypotenuse 3a inclined with respect to the airflow direction and a second hypotenuse 3b inclined with a direction different from the first hypotenuse 3a with respect to the airflow direction. (See FIG. 7).
  • the base of the triangular protrusion is called the pitch p of the serration (triangular protrusion)
  • the bisector of the apex angle ⁇ of the triangular protrusion is It is called the direction of (triangular protrusion)
  • the distance from the bisector of the apex angle to the base is called the height h of the serration (triangular protrusion).
  • the size of the serration means that either the pitch or height of the serration is large.
  • the apex angle ⁇ of the triangular protrusion is called the serration apex angle ⁇ . In the case where the sides of the triangle are curved, they are generally similar to these.
  • FIG. 3 is a view of the blade leading edge as viewed from above, and the arrow displayed in FIG. 3 indicates the velocity of the flow around the serration on the XZ plane projection plane (S plane in FIG. 4).
  • S plane in FIG. 4 This is a projection of a vector (Tangential Velocity). It can be seen that a flow is generated from the valleys on both sides toward the upper surface of the mountain. In serration, at the beginning of the peak, a small engulfment occurs and grows into a larger engulfment as it goes to the valley.
  • Embodiment of this invention changes the pitch, height, or direction of a serration according to the flow of the airflow in the radial direction position of the ventilation fan 1 based on the fundamental effect of the said serration. is there. That is, in the first embodiment, the serration pitch, height, and direction in the first part and the second part in which the radial distance of the blower fan is different from the rotation center Q of the blade 3 are different. At least one is different. Examples of the first part and the second part of the blade 3 include a flow velocity of the airflow (the magnitude of the flow velocity in FIGS. 7 and 8) and a portion having a different flow direction, but are not necessarily limited thereto. 3 indicates any two sites along the line 3.
  • the flow of airflow in the vicinity of the blade surface of the blower varies greatly depending on the part, and the air flow rate is higher toward the outer peripheral side with respect to the radial direction of the blower fan. It becomes a diagonal flow toward. Furthermore, a backflow that wraps from the pressure surface to the suction surface side also occurs at the blade tip.
  • Changing the pitch, height, or direction of the serration according to the flow of the airflow in the radial position (at least two places) of the blower fan 1 is extremely effective in reducing flow separation. is important. As a result, the fundamental effect of the original serration is exhibited, and it is possible to reduce the noise near the blade surface and suppress the pressure fluctuation on the blade surface, thereby producing an effect that leads to a reduction in noise.
  • the first embodiment is a fan characterized in that an airflow control shape that minimizes noise generated by airflow turbulence is provided at each position of the blade. Noise reduction, airflow reduction, and driving are achieved by the airflow control shape. The effect can be obtained while preventing the increase in torque.
  • the blade has a serrated shape (sawtooth shape), and the serrated shape is changed according to the flow of the airflow. According to this, since the serration shape can be appropriately set in each part having different airflow directions and flow velocities, it is possible to achieve both noise reduction and the effect of preventing airflow reduction and driving torque increase.
  • the second and third embodiments are embodiments corresponding to the case where the airflow near the blade surface of the blower is in the circumferential direction of the blower fan.
  • the second embodiment is characterized in that the size of the serration is increased toward the blade outer diameter side. The direction of the serration is when it faces the circumferential direction of the blower fan. According to this, since the size of the serration is increased at the portion where the flow velocity on the blade outer peripheral side is large, the entrained air flow generated by the serration is weaker on the blade inner peripheral side and stronger on the blade outer peripheral side. As a result, in a flow having a high flow velocity at which separation is likely to occur, a strong downward flow on the blade surface can be generated to reduce separation, and noise reduction and an effect of reducing the air volume and driving torque can be obtained on the entire blade.
  • the third embodiment is characterized in that the apex angle ⁇ of the serration becomes sharper toward the blade outer diameter side.
  • the serration angle is set to an acute angle at a portion where the flow velocity on the blade outer peripheral side is large, the entrained air flow generated by the serration is weaker on the blade inner peripheral side and stronger on the blade outer peripheral side.
  • the flow below the blade surface generated in the serration trough is strengthened, and it is possible to achieve both noise reduction and air flow reduction / drive torque increase prevention for the entire blade.
  • the serration angle may be an acute angle.
  • the fourth embodiment is characterized in that serrations are also provided on a trailing edge 7 and the serration shape is changed between the leading edge 6 and the trailing edge 7.
  • the blade trailing edge 7 is provided with serrations, the flow on both sides of the blade gradually merges due to serration when the flow of the high pressure blade pressure surface and the low pressure blade suction surface flow mix near the blade trailing edge. The turbulence of the airflow behind the blade can be suppressed.
  • the serration shape may be appropriately set for each of the blade leading edge 6 and the blade trailing edge 7.
  • the blade trailing edge 7 has a smaller serration than the blade leading edge 6, the blade leading edge side serration provided to suppress separation is enlarged so that a radial flow can be generated, thereby suppressing airflow turbulence. Since the serration on the trailing edge side of the blade can be reduced so that the flow on both sides of the positive and negative pressures is gradually mixed, an effect can be obtained by reducing both noise and preventing an increase in air volume and an increase in driving torque.
  • the serration installation range at the blade trailing edge and the blade leading edge may be changed, and serrations may be provided only at appropriate positions at the blade leading edge 6 and the blade trailing edge 7 having different flows.
  • the fifth and sixth embodiments will describe embodiments corresponding to the case where the flow of the airflow near the blade surface of the blower is oblique flow with respect to the circumferential direction of the blower fan.
  • the fifth embodiment is an embodiment corresponding to the case where the flow of airflow near the blade surface of the blower is a diagonal flow.
  • the direction of serration of the blade leading edge is matched to the direction of diagonal flow.
  • the sixth embodiment is characterized in that the serration installation range is changed between the blade trailing edge 7 and the blade leading edge 6.
  • the airflow when the airflow is a diagonal flow like a swept wing, the airflow flows on the blade surface from the blade leading edge 6 toward the blade trailing edge 7 in the outer circumferential direction.
  • serrations are installed in a wide range on the leading edge side of the blade that interferes with the airflow at any blade position, and serrations are provided only on the part where the diagonal flow is prominent on the trailing edge side of the blade. Torque increase prevention can be achieved at the same time.
  • the seventh embodiment is characterized in that the serrated shape of the blade tip is reduced. According to this, since the serration shape is reduced at the blade tip portion where the turbulence of the airflow due to the backflow is large, the vortex of the entrained airflow generated by the serration is subdivided. As a result, the turbulence of the airflow at the blade tip can be reduced, so that an effect of reducing noise and preventing an increase in air volume and an increase in driving torque can be obtained. As shown in FIG. 13, the eighth embodiment is characterized in that the serration shape of the blade tip portion of the blade trailing edge 7 is reduced, and the same effect as the seventh embodiment can be obtained.
  • the direction of serration of the blade leading edge 6 is adjusted to the direction of the diagonal flow in order to correspond to the flow of airflow in the vicinity of the blade surface of the blower, and It is embodiment which matched the serration shape with the airflow by a backflow.
  • the ninth embodiment is included in the first embodiment. According to this, since the direction of the serration can be set in accordance with the flow direction, it is possible to obtain noise reduction and an effect of preventing a reduction in air volume and an increase in driving torque. Of course, combinations of the fifth and sixth embodiments for mixed flow and the seventh and eighth embodiments for reverse flow are also included in the ninth embodiment.

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

Abstract

L'invention porte sur une soufflante (10) comprenant un moteur d'entraînement (300) et un ventilateur de soufflage d'air (1), qui possède un moyeu (4) monté sur le moteur d'entraînement (300) et des pales (3) qui sont montées sur le moyeu (4). La soufflante (10) est caractérisée en ce que des dentelures comprenant des saillies de forme triangulaire sont formées sur le bord avant (6) de chacune des pales (3) de façon à être disposées le long du bord avant (6) et en ce que le pas, la hauteur ou la direction des dentelures varie en fonction du flux d'air qui passe à une position radiale sur le ventilateur de soufflage d'air (1).
PCT/JP2013/065282 2012-05-31 2013-05-31 Soufflante WO2013180296A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE201311002698 DE112013002698T5 (de) 2012-05-31 2013-05-31 Luftgebläse
CN201380027931.4A CN104364532B (zh) 2012-05-31 2013-05-31 鼓风机
US14/404,259 US20150152875A1 (en) 2012-05-31 2013-05-31 Air blower

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-124250 2012-05-31
JP2012124250A JP5880288B2 (ja) 2012-05-31 2012-05-31 送風機

Publications (1)

Publication Number Publication Date
WO2013180296A1 true WO2013180296A1 (fr) 2013-12-05

Family

ID=49673479

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/065282 WO2013180296A1 (fr) 2012-05-31 2013-05-31 Soufflante

Country Status (5)

Country Link
US (1) US20150152875A1 (fr)
JP (1) JP5880288B2 (fr)
CN (1) CN104364532B (fr)
DE (1) DE112013002698T5 (fr)
WO (1) WO2013180296A1 (fr)

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JP2020536193A (ja) * 2017-09-29 2020-12-10 キャリア コーポレイションＣａｒｒｉｅｒ Ｃｏｒｐｏｒａｔｉｏｎ 波状翼及び後縁セレーションを有する軸流ファンブレード
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WO2017041009A1 (fr) * 2015-09-02 2017-03-09 Mckinney Krista Pale à épaisseur unique dotée de dentelures de bord d'attaque sur un ventilateur axial
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WO2018008126A1 (fr) * 2016-07-07 2018-01-11 三菱電機株式会社 Dispositif de soufflante, unité extérieure pour climatiseur et dispositif à cycle de réfrigération
AU2017206193B2 (en) * 2016-09-02 2023-07-27 Fujitsu General Limited Axial fan and outdoor unit
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USD980965S1 (en) 2019-05-07 2023-03-14 Carrier Corporation Leading edge of a fan blade
US11187083B2 (en) 2019-05-07 2021-11-30 Carrier Corporation HVAC fan
CN113738700B (zh) * 2020-05-27 2023-06-02 广东美的白色家电技术创新中心有限公司 风机、空调室外机和空调系统
CN115126708A (zh) * 2021-03-26 2022-09-30 全亿大科技（佛山）有限公司 叶轮及散热风扇
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US20170261000A1 (en) * 2014-09-18 2017-09-14 Denso Corporation Blower
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DE102021105225A1 (de) 2020-03-10 2021-09-16 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator und Ventilatorflügel
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EP4083433A1 (fr) 2020-03-10 2022-11-02 ebm-papst Mulfingen GmbH & Co. KG Ventilateur et aubes de ventilateur
EP4083432A1 (fr) 2020-03-10 2022-11-02 ebm-papst Mulfingen GmbH & Co. KG Ventilateur et aubes de ventilateur
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JP5880288B2 (ja) 2016-03-08
CN104364532A (zh) 2015-02-18
DE112013002698T5 (de) 2015-02-26
JP2013249762A (ja) 2013-12-12
US20150152875A1 (en) 2015-06-04

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