JP2001182689A - Impeller for air blower - Google Patents
Impeller for air blowerInfo
- Publication number
- JP2001182689A JP2001182689A JP36464799A JP36464799A JP2001182689A JP 2001182689 A JP2001182689 A JP 2001182689A JP 36464799 A JP36464799 A JP 36464799A JP 36464799 A JP36464799 A JP 36464799A JP 2001182689 A JP2001182689 A JP 2001182689A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- blade
- hub
- blades
- leading edge
- 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.)
- Pending
Links
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
- F04D29/66—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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、厚さのある翼形羽
根を備えた送風機用羽根車の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an impeller for a blower having a thick airfoil blade.
【０００２】[0002]
【従来の技術】従来この種厚さのある翼形羽根を備えた
送風機用羽根車は、例えば特開平１−９６４９８号公報
に開示されているように、図９、図１０のような構造に
なっていた。2. Description of the Related Art Conventionally, an impeller for a blower having such a thick airfoil blade has a structure as shown in FIGS. 9 and 10 as disclosed in, for example, JP-A-1-96498. Had become.
【０００３】図９において、１は略円錐台形状のハブで
あり、前記ハブ１の周囲に所定の取り付け角度で複数枚
の厚肉の羽根２を設けている。In FIG. 9, reference numeral 1 denotes a substantially frustoconical hub. A plurality of thick blades 2 are provided around the hub 1 at a predetermined mounting angle.
【０００４】さらに、前記ハブ１の中心部にボス部３を
配設して羽根車Ａが構成される。そして、前記ボス部３
にモ−タ−シャフト（図示せず）を固定して、前記羽根
車Ａを適切なケ−シングに収め、モ−タ−（図示せず）
により矢印ａの方向に回転させることにより、空気は図
２に矢印ｃ、ｄで示すように、前記羽根２の前縁部２ｄ
より流入し後縁部２ｈより流出して送風作用を生じる構
成としていた。Further, an impeller A is constructed by disposing a boss 3 at the center of the hub 1. And the boss 3
A motor shaft (not shown) is fixed to the motor, and the impeller A is housed in an appropriate casing, and a motor (not shown) is provided.
By rotating the blade 2 in the direction of the arrow a, the air flows in the leading edge 2d of the blade 2 as shown by arrows c and d in FIG.
The air flowed in and flowed out from the trailing edge 2h to generate a blowing action.
【０００５】ところで、前記羽根２は図１０に示すよう
に圧力面側２Ｂ、負圧面側２Ｃとも平坦に構成されてい
た。As shown in FIG. 10, the blade 2 is configured to be flat on both the pressure side 2B and the suction side 2C.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、このよ
うな構成の羽根車は、大風量、低騒音化の要請に対して
一定の効果を発揮したが、さらなる低騒音化の要請に対
しては限界にきていた。本発明はこのような課題に対し
て、より一層の低騒音化を図った送風機用羽根車を提供
することを目的とするものである。However, the impeller having such a structure has exerted a certain effect on the demand for a large air volume and low noise, but has a limit to the demand for further low noise. I was coming. It is an object of the present invention to provide an impeller for a blower which has further reduced the noise with respect to such a problem.
【０００７】[0007]
【課題を解決するための手段】略円錐台形状のハブの周
囲に所定の取り付け角度で複数枚の羽根を設け、前記各
羽根の前縁部近傍に複数個の凸部を前記ハブの基部から
羽根の翼端までの全域に所定間隔で配設して送風機用羽
根車を構成したものである。A plurality of blades are provided at a predetermined mounting angle around a substantially frustoconical hub, and a plurality of convex portions are formed near the front edge of each of the blades from the base of the hub. The impeller for a blower is arranged at predetermined intervals over the entire area up to the blade tip of the blade.
【０００８】この構成により、各羽根の前縁部近傍に複
数個の凸部を設けたことにより、前記前縁部近傍に小さ
な乱流を形成させて、羽根の前縁部より進入した空気が
後縁部に至るまでに発生する比較的大きな剥離を低減さ
せることができる。[0008] With this configuration, by providing a plurality of convex portions near the leading edge of each blade, a small turbulent flow is formed near the leading edge, so that air entering from the leading edge of the blade is reduced. Relatively large peeling that occurs up to the trailing edge can be reduced.
【０００９】その結果、流入空気の剥離に伴う圧力変動
による騒音レベルを低減し、より一層の低騒音化を達成
するものである。As a result, the noise level due to the pressure fluctuation caused by the separation of the inflow air is reduced, and the noise is further reduced.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態につい
て図１、図２を用いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１１】なお、従来例と同一構成については同一符
号を付して説明する。The same components as those of the conventional example will be described with the same reference numerals.
【００１２】図１において、１は略円錐台形状のハブで
あり、前記ハブ１の周囲に所定の取り付け角度で複数枚
の厚肉の羽根２を設けている。In FIG. 1, reference numeral 1 denotes a substantially frustoconical hub. A plurality of thick blades 2 are provided around the hub 1 at a predetermined mounting angle.
【００１３】また、前記各羽根２の負圧面側２Ｃの前縁
部２ｄ近傍にハの字形状の一対の凸部２ｅを、前記ハブ
１の基部２ｆから羽根２の翼端２ｇまでの全域に一定間
隔で配設し、さらに前記ハブ１の中心部にボス部３を配
設して羽根車Ａが構成される。A pair of convex portions 2e having a U-shape are formed in the vicinity of the front edge 2d on the suction side 2C of each blade 2 over the entire area from the base 2f of the hub 1 to the blade tip 2g of the blade 2. An impeller A is formed by disposing the bosses 3 at regular intervals and further disposing a boss 3 at the center of the hub 1.
【００１４】そして、前記ボス部３にモ−タ−シャフト
（図示せず）を固定して、前記羽根車Ａを適切なケ−シ
ングに収め、モ−タ−（図示せず）により矢印ａの方向
に回転させることにより、空気は図２に矢印ｃ、ｄで示
すように、前記羽根２の前縁部２ｄより流入し後縁部２
ｈより流出して送風作用を生じる構成とした。Then, a motor shaft (not shown) is fixed to the boss portion 3, and the impeller A is housed in an appropriate casing. 2, the air flows in from the front edge 2 d of the blade 2 as shown by arrows c and d in FIG.
h to generate a blowing action.
【００１５】上記構成により、各羽根２の負圧面側２Ｃ
の前縁部２ｄ近傍に複数個の凸部２ｅを設けたことによ
り、前記前縁部２ｄ近傍に小さな乱流を形成させて乱流
制御を行うことにより、羽根２の前縁部２ｄより負圧面
側２Ｃに流入した空気が後縁部２ｈに至るまでに発生す
る比較的大きな剥離を低減させることができる。With the above configuration, the suction side 2C of each blade 2
By providing a plurality of convex portions 2e near the leading edge 2d of the blade 2, a small turbulent flow is formed near the leading edge 2d to perform turbulent flow control. Relatively large separation that occurs before the air flowing into the pressure surface side 2C reaches the trailing edge 2h can be reduced.
【００１６】その結果、流入空気の剥離に伴う圧力変動
による騒音レベルを低減し、より一層の低騒音化を達成
することができる。As a result, it is possible to reduce the noise level due to the pressure fluctuation due to the separation of the inflow air, and to achieve a further reduction in noise.
【００１７】なお、本実施の形態では前記を一対のハの
字形状として説明したが、他の形状、例えば四角錘、三
角錐、リブ等であっても同様の効果を得ることができ
る。In the present embodiment, the above description has been made as a pair of C-shapes, but the same effect can be obtained with other shapes such as a quadrangular pyramid, a triangular pyramid, and a rib.
【００１８】また前記乱流制御は、前記凸部２ｅの形
状、大きさおよび数を最適化することにより自在に実施
することができる。The turbulence control can be freely performed by optimizing the shape, size and number of the projections 2e.
【００１９】また、図３、図４に示すように、前記各羽
根２の負圧面側２Ｃの前縁部２ｄ近傍、および圧力面側
２Ｂの前縁部２ｄ近傍の両面にハの字形状の一対の凸部
２ｅを、前記ハブ１の基部２ｆから羽根２の翼端２ｇま
での全域に一定間隔で配設し、さらに、前記ハブ１の中
心部にボス部３を配設して羽根車Ａ１が構成される。As shown in FIG. 3 and FIG. 4, a U-shape is formed on both surfaces of the blades 2 near the front edge 2d on the suction side 2C and near the front edge 2d on the pressure side 2B. A pair of protrusions 2e are arranged at regular intervals over the entire area from the base 2f of the hub 1 to the blade tip 2g of the blade 2, and a boss 3 is provided at the center of the hub 1 to provide an impeller. A1 is configured.
【００２０】そして、前記ハブ１の中心部に配設したボ
ス部３にモ−タ−シャフト（図示せず）を固定して、前
記羽根車Ａ１を適切なケ−シングに収め、モ−タ−（図
示せず）により矢印ａの方向に回転させることにより、
空気は図４に矢印ｃ、ｄで示すように前記羽根２の前縁
部２ｄより流入し後縁部２ｈより流出して送風作用を生
じる構成とした。Then, a motor shaft (not shown) is fixed to a boss portion 3 provided at the center of the hub 1, and the impeller A1 is housed in an appropriate casing to provide a motor. By rotating in the direction of arrow a by-(not shown),
As shown by arrows c and d in FIG. 4, the air flows in from the front edge 2d of the blade 2 and flows out from the rear edge 2h to generate a blowing action.
【００２１】上記構成により、羽根２の負圧面側２Ｃの
前縁部２ｄ近傍と圧力面側２Ｂの前縁部２ｄ近傍に配設
した凸部２ｅにより、前記前縁部２ｄ近傍に小さな乱流
を形成させて乱流制御を行うことにより、羽根２の前縁
部２ｄより負圧面側２Ｃと圧力面側２Ｂに流入した空気
が後縁部２ｈに至るまでに発生する比較的大きな剥離を
低減させることができる。With the above configuration, the small turbulence near the front edge 2d is formed by the convex portion 2e disposed near the front edge 2d on the suction side 2C of the blade 2 and near the front edge 2d on the pressure side 2B. Is formed and the turbulence control is performed to reduce relatively large separation that occurs when the air flowing from the leading edge 2d of the blade 2 to the suction side 2C and the pressure side 2B reaches the trailing edge 2h. Can be done.
【００２２】その結果、流入空気の剥離に伴う圧力変動
による騒音レベルをさらに低減し、より一層の低騒音化
を達成するものである。As a result, the noise level due to the pressure fluctuation caused by the separation of the inflow air is further reduced, and the noise is further reduced.
【００２３】なお、本実施の形態では前記凸部２ｅを一
対のハの字形状として説明したが、他の形状、例えば四
角錘、三角錐、リブ等であっても同様の効果を得ること
ができる。In the present embodiment, the convex portion 2e has been described as a pair of U-shapes, but the same effect can be obtained with other shapes such as a quadrangular pyramid, a triangular pyramid, and a rib. it can.
【００２４】また前記乱流制御は、前記凸部２ｅの形
状、大きさおよび数を最適化することにより自在に実施
することができる。The turbulence control can be freely performed by optimizing the shape, size and number of the projections 2e.
【００２５】また、図５、図６に示すように、前記羽根
２の前縁部２ｄがハブ１から半径方向外向きに向かう直
線部２０ｄと、前記直線部２０ｄの終端２２ｄと翼端２
ｇ部間では回転方向（矢印ａ）に頂点を持つ三角部２１
ｄから構成される羽根車Ａ２において、前記三角部２１
ｄの前縁部２ｄ近傍に、略四角錘形状の突起部２ｊを所
定間隔で複数個設ける。As shown in FIGS. 5 and 6, the leading edge 2d of the blade 2 is directed radially outward from the hub 1, a straight portion 20d, a terminal end 22d of the straight portion 20d, and a wing tip 2d.
Triangular portion 21 having a vertex in the rotation direction (arrow a) between portions g
d, the triangular portion 21
A plurality of substantially quadrangular pyramid-shaped protrusions 2j are provided at predetermined intervals in the vicinity of the front edge 2d of d.
【００２６】さらに、前記各羽根２の負圧面側２Ｃで前
記直線部２０ｄの前縁部２ｄ近傍にハの字形状の一対の
凸部２ｅを、前記ハブ１の基部２ｆから直線部２０ｄの
終端２２ｄまでの全域に一定間隔で配設し、さらに前記
ハブ１の中心部にボス部３を配設して羽根車Ａ２が構成
される。Further, a pair of convex portions 2e having a U-shape in the vicinity of the front edge 2d of the linear portion 20d on the suction side 2C of each of the blades 2 is provided. An impeller A2 is formed by arranging the hub 1 at regular intervals throughout the entire area up to 22d and further arranging the boss 3 at the center of the hub 1.
【００２７】そして前記ボス部３にモ−タ−シャフト
（図示せず）を固定して、前記羽根車Ａ２を適切なケ−
シングに収め、モ−タ−（図示せず）により矢印ａの方
向に回転させることにより、空気は図６に矢印ｃ、ｄで
示すように前記羽根２の前縁部２ｄより流入し後縁部２
ｈより流出して送風作用を生じる構成とした。Then, a motor shaft (not shown) is fixed to the boss portion 3, and the impeller A2 is fixed to an appropriate case.
The air is introduced from the front edge 2d of the blade 2 as shown by arrows c and d in FIG. 6 by rotating the motor in the direction of arrow a by a motor (not shown). Part 2
h to generate a blowing action.
【００２８】上記構成において、羽根２の負圧面側２Ｃ
に配設した突起部２ｊと凸部２ｅにより、前記前縁部２
ｄ近傍に小さな乱流を形成させて乱流制御を行うことに
より、羽根２の前縁部２ｄより負圧面側２Ｃに流入した
空気が後縁部２ｈに至るまでに発生する比較的大きな剥
離を低減させることができる。In the above structure, the suction side 2C of the blade 2
The projection 2j and the projection 2e arranged on the front edge 2
By performing a turbulent flow control by forming a small turbulent flow in the vicinity of d, the relatively large separation that occurs when the air flowing from the leading edge 2d of the blade 2 to the suction side 2C reaches the trailing edge 2h. Can be reduced.
【００２９】その結果、流れの剥離による圧力変動が低
減して、騒音スペクトルでは約２００Ｈｚ〜２５００Ｈ
ｚの広い周波数域で音圧レベルが低下し、騒音レベルが
低下する。As a result, pressure fluctuation due to flow separation is reduced, and the noise spectrum is about 200 Hz to 2500 H.
The sound pressure level decreases in a wide frequency range of z, and the noise level decreases.
【００３０】なお、本実施の形態では前記突起部２ｊを
略四角錘形状として説明し、また、前記凸部２ｅを一対
のハの字形状として、突起部２ｊと凸部２ｅは異なる形
状で説明したが、これは前記各羽根２の三角部２１ｄに
おいては空気の流入状況が直線部２０ｄと異なるため、
最適な乱流形成を行わせるためである。In the present embodiment, the protrusion 2j is described as having a substantially quadrangular pyramid shape, and the protrusion 2e is formed as a pair of C-shapes, and the protrusion 2j and the protrusion 2e are described as having different shapes. However, this is because the air inflow condition at the triangular portion 21d of each blade 2 is different from that at the straight portion 20d,
This is for performing the optimal turbulence formation.
【００３１】勿論、突起部２ｊと凸部２ｅは同一形状で
も、また他の形状例えば四角錘、三角錐、リブ等であっ
ても同様の効果を得ることができる。Of course, the same effect can be obtained even if the protrusions 2j and the protrusions 2e have the same shape, or other shapes such as quadrangular pyramids, triangular pyramids, and ribs.
【００３２】また前記乱流制御は、前記突起部２ｊと凸
部２ｅの形状、大きさおよび数を最適化することにより
自在に実施することができる。The turbulence control can be freely performed by optimizing the shape, size and number of the projections 2j and the projections 2e.
【００３３】また、図７、図８に示すように、前記羽根
２の前縁部２ｄがハブ１から半径方向外向きに向かう直
線部２０ｄと、前記直線部２０ｄの終端２２ｄと翼端２
ｇ部間では回転方向（矢印ａ）に頂点を持つ三角部２１
ｄから構成される羽根車Ａ３において、前記各羽根２の
負圧面側２Ｃの前記三角部２１ｄ近傍、および圧力面側
２Ｂの前記三角部２１ｄ近傍の両面に、略四角錘形状の
突起部２ｊを所定間隔に複数個設ける。As shown in FIGS. 7 and 8, a straight portion 20d in which the front edge 2d of the blade 2 is directed radially outward from the hub 1, a terminal end 22d of the straight portion 20d, and a wing tip 2
Triangular portion 21 having a vertex in the rotation direction (arrow a) between portions g
In the impeller A3 composed of the blades d, substantially quadrangular pyramid-shaped projections 2j are provided on both surfaces near the triangular portion 21d on the suction surface side 2C of each of the blades 2 and near the triangular portion 21d on the pressure surface side 2B. A plurality are provided at predetermined intervals.
【００３４】さらに、前記直線部２０ｄの近傍で負圧面
側２Ｃおよび圧力面側２Ｂの両面に、ハの字形状の一対
の凸部２ｅを、前記ハブ１の基部２ｆから直線部２０ｄ
の終端２２ｄまでの全域に一定間隔で配設して設け、さ
らに前記ハブ１の中心部にボス部３を配設して羽根車Ａ
３が構成される。Further, a pair of convex portions 2e having a U-shape are formed on both sides of the suction side 2C and the pressure side 2B in the vicinity of the straight portion 20d.
Are arranged at regular intervals in the entire area up to the end 22 d of the hub 1, and a boss 3 is arranged in the center of the hub 1 so that the impeller A
3 are configured.
【００３５】そして前記ボス部３にモ−タ−シャフト
（図示せず）を固定して、前記羽根車Ａ３を適切なケ−
シングに収め、モ−タ−（図示せず）により矢印ａの方
向に回転させることにより空気は図８に矢印ｃ、ｄで示
すように、前記羽根２の前縁部２ｄより流入し後縁部２
ｈより流出して送風作用を生じる構成とした。Then, a motor shaft (not shown) is fixed to the boss portion 3, and the impeller A3 is fixed to an appropriate case.
The air is introduced from the leading edge 2d of the blade 2 as shown by arrows c and d in FIG. 8 by rotating the motor in the direction of arrow a by a motor (not shown). Part 2
h to generate a blowing action.
【００３６】上記構成において、羽根２の負圧面側２Ｃ
および圧力面側２Ｂの前縁部２ｄ近傍に配設した突起部
２ｊと凸部２ｅにより、前記前縁部２ｄ近傍に小さな乱
流を形成させて乱流制御を行うことにより、羽根２の前
縁部２ｄより負圧面側２Ｃおよび圧力面側２Ｂに流入し
た空気が、縁部２ｈに至るまでに発生する比較的大きな
剥離を低減させることができる。In the above configuration, the pressure side 2C of the blade 2
In addition, the protrusion 2j and the protrusion 2e disposed near the front edge 2d on the pressure surface side 2B form a small turbulent flow near the front edge 2d to perform turbulent flow control. It is possible to reduce the relatively large separation that occurs when the air flowing from the edge 2d to the suction side 2C and the pressure side 2B reaches the edge 2h.
【００３７】その結果、流れの剥離による圧力変動が低
減して、騒音スペクトルでは約２００Ｈｚ〜２５００Ｈ
ｚの広い周波数域で音圧レベルが低下し、騒音レベルが
低下する。As a result, the pressure fluctuation due to the separation of the flow is reduced, and the noise spectrum is about 200 Hz to 2500 H.
The sound pressure level decreases in a wide frequency range of z, and the noise level decreases.
【００３８】なお、本実施の形態では前記突起部２ｊを
略四角錘形状として説明し、また、前記凸部２ｅを一対
のハの字形状として、突起部２ｊと凸部２ｅは異なる形
状で説明したが、これは前記三角部２１ｄにおいては空
気の流入状況が前記直線部２０ｄと異なるため、最適な
乱流形成を行わせるためである。In this embodiment, the protrusion 2j is described as having a substantially quadrangular pyramid shape, and the protrusion 2e is formed as a pair of C-shapes, and the protrusion 2j and the protrusion 2e are described as having different shapes. However, this is because the turbulent flow is optimally formed in the triangular portion 21d since the air inflow condition is different from that of the straight portion 20d.
【００３９】勿論、突起部２ｊと凸部２ｅは同一形状で
も、また他の形状例えば四角錘、三角錐、リブ等であっ
ても同様の効果を得ることができる。Of course, the same effect can be obtained even if the protrusions 2j and the protrusions 2e have the same shape, or another shape such as a quadrangular pyramid, a triangular pyramid, or a rib.
【００４０】また前記乱流制御は、前記突起部２ｊと凸
部２ｅの形状、大きさおよび数を最適化することにより
自在に実施することができる。The turbulence control can be freely performed by optimizing the shape, size and number of the projections 2j and the projections 2e.
【００４１】なお、上記各実施例における送風機用羽根
車は、略円錐台形状のハブを有するものであったが、ハ
ブの形状はそれに限られるものではなく、略円筒形状の
ものであっても同様の作用効果を奏する。Although the impeller for the blower in each of the above embodiments has a substantially frustoconical hub, the shape of the hub is not limited to this, and may be a substantially cylindrical one. It has the same effect.
【００４２】[0042]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載するような効果を奏する。The present invention is embodied in the form described above, and has the following effects.
【００４３】請求項１記載の発明は、円錐台形状のハブ
の周囲に複数枚の羽根を設け、前記各羽根の前縁部近傍
に複数個の凸部を前記ハブの基部から羽根の翼端までの
全域に所定間隔で配設して構成したことにより、前記凸
部により前記前縁部近傍に小さな乱流を形成させて乱流
制御を行うことにより、羽根の前縁部より負圧面側に流
入した空気が後縁部に至るまでに発生する比較的大きな
剥離を低減させることができる。According to the first aspect of the present invention, a plurality of blades are provided around a truncated conical hub, and a plurality of protrusions are provided near the leading edge of each blade from the base of the hub to the blade tip of the blade. By forming a small turbulence near the front edge by the convex portion and controlling the turbulence by being arranged at a predetermined interval in the entire region up to the negative pressure side from the front edge of the blade The relatively large separation that occurs before the air that has flowed into the rear edge reaches the trailing edge can be reduced.
【００４４】その結果、流入空気の剥離に伴う圧力変動
による騒音レベルを低減し、より一層の低騒音化を達成
することができる。As a result, it is possible to reduce the noise level due to the pressure fluctuation caused by the separation of the inflow air, and to achieve a further reduction in noise.
【００４５】また、請求項２記載の発明は、各羽根の負
圧面側の前縁部近傍、および圧力面側の前縁部近傍の両
面に、複数個の凸部をハブの基部から羽根の翼端までの
全域に所定間隔で配設して構成したことにより、前記凸
部により前記前縁部近傍に小さな乱流を形成させて乱流
制御を行うことにより、羽根の前縁部より負圧面側と圧
力面側に流入した空気が後縁部に至るまでに発生する比
較的大きな剥離を低減させることができる。Further, the invention according to claim 2 is characterized in that a plurality of convex portions are provided on both surfaces near the leading edge on the suction side and near the leading edge on the pressure side of each blade from the base of the hub. By being arranged at predetermined intervals in the entire area up to the blade tip, a small turbulence is formed in the vicinity of the leading edge by the projection, and turbulence control is performed. It is possible to reduce the relatively large separation that occurs when the pressure surface side and the air flowing into the pressure surface side reach the trailing edge.
【００４６】その結果、流入空気の剥離に伴う圧力変動
による騒音レベルをさらに低減し、より一層の低騒音化
を達成することができる。As a result, it is possible to further reduce the noise level due to the pressure fluctuation due to the separation of the inflow air, and to achieve a further reduction in noise.
【００４７】また、請求項３記載の発明は、略円錐台形
状のハブの周囲に複数枚の羽根を設け、前記各羽根は直
線部と三角部から構成される羽根車において、前記各羽
根の負圧面側で前記三角部の前縁部近傍に複数個の突起
部を所定間隔で配設し、さらに前記各羽根の負圧面側で
前記直線部の前縁部近傍に複数個の凸部を所定間隔で配
設したことにより、前記突起部と凸部により前記前縁部
近傍に小さな乱流を形成させて乱流制御を行うことによ
り、羽根の前縁部より負圧面側に流入した空気が後縁部
に至るまでに発生する比較的大きな剥離を低減させるこ
とができる。According to a third aspect of the present invention, there is provided an impeller having a plurality of blades provided around a substantially frustoconical hub, wherein each of the blades comprises a straight portion and a triangular portion. A plurality of protrusions are arranged at predetermined intervals near the front edge of the triangular portion on the suction surface side, and a plurality of protrusions near the front edge of the linear portion on the suction surface side of each blade. With the arrangement at a predetermined interval, the turbulent flow is controlled by forming a small turbulent flow near the front edge by the protrusions and the convex portions, so that the air flowing from the front edge of the blade to the negative pressure surface side is formed. Can reduce relatively large peeling that occurs before reaching the trailing edge.
【００４８】その結果、流れの剥離による圧力変動が低
減して、騒音スペクトルでは約２００Ｈｚ〜２５００Ｈ
ｚの広い周波数域で音圧レベルを低下させ、より一層の
低騒音化を達成することができる。As a result, the pressure fluctuation due to the separation of the flow is reduced, and the noise spectrum is about 200 Hz to 2500 H.
The sound pressure level can be reduced in a wide frequency range of z, and the noise can be further reduced.
【００４９】また、請求項４記載の発明は、略円錐台形
状のハブの周囲に複数枚の羽根を設け、前記各羽根は直
線部と三角部から構成される羽根車において、前記各羽
根の負圧面側で前記三角部の前縁部近傍、および圧力面
側で前記三角部の前縁部近傍の両面に複数個の突起部を
所定間隔で配設し、さらに前記各羽根の負圧面側で前記
直線部の前縁部近傍、および圧力面側で前記直線部の前
縁部近傍の両面に複数個の凸部を所定間隔で配設して構
成したことにより、前記突起部と凸部により前記前縁部
近傍に小さな乱流を形成させて乱流制御を行うことによ
り、羽根の前縁部より負圧面側および圧力面側に流入し
た空気が後縁部に至るまでに発生する比較的大きな剥離
を低減させることができる。According to a fourth aspect of the present invention, in the impeller, a plurality of blades are provided around a substantially frustoconical hub, and each of the blades comprises a straight portion and a triangular portion. A plurality of protrusions are arranged at predetermined intervals on both sides near the leading edge of the triangular portion on the suction surface side and near the leading edge of the triangular portion on the pressure surface side, and further on the suction surface side of each of the blades. In the vicinity of the front edge of the straight portion, and on the pressure surface side, a plurality of protrusions are arranged at predetermined intervals on both surfaces near the front edge of the straight portion, so that the protrusion and the protrusion A small turbulence is formed near the leading edge to control the turbulence, so that air flowing from the leading edge of the blade to the suction side and the pressure side reaches the trailing edge. It is possible to reduce extremely large peeling.
【００５０】その結果、流れの剥離による圧力変動が低
減して、騒音スペクトルでは約２００Ｈｚ〜２５００Ｈ
ｚの広い周波数域で音圧レベルをさらに低下させ、より
一層の低騒音化を達成することができる。As a result, the pressure fluctuation due to the separation of the flow is reduced, and the noise spectrum is about 200 Hz to 2500 H.
It is possible to further reduce the sound pressure level in a wide frequency range of z and achieve further noise reduction.
【図１】本発明の実施の形態を示す送風機用羽根車の斜
視図FIG. 1 is a perspective view of an impeller for a blower showing an embodiment of the present invention.
【図２】図１におけるｂ−ｂ縦断面図FIG. 2 is a vertical sectional view taken along line bb in FIG.
【図３】本発明の実施の形態における他の実施例を示す
送風機用羽根車の斜視図FIG. 3 is a perspective view of an impeller for a blower showing another example of the embodiment of the present invention.
【図４】図３におけるｂ−ｂ縦断面図FIG. 4 is a vertical sectional view taken along line bb in FIG. 3;
【図５】本発明の実施の形態における他の実施例を示す
送風機用羽根車の斜視図FIG. 5 is a perspective view of an impeller for a blower showing another example of the embodiment of the present invention.
【図６】図５におけるｂ−ｂ縦断面図6 is a vertical sectional view taken along line bb in FIG. 5;
【図７】本発明の実施の形態における他の実施例を示す
送風機用羽根車の斜視図FIG. 7 is a perspective view of an impeller for a blower showing another example of the embodiment of the present invention.
【図８】図７におけるｂ−ｂ縦断面図8 is a vertical sectional view taken along line bb in FIG. 7;
【図９】従来例の送風機用羽根車の斜視図FIG. 9 is a perspective view of a conventional fan impeller.
【図１０】図９におけるｂ−ｂ縦断面図10 is a vertical sectional view taken along line bb in FIG. 9;
１ ハブ ２ 羽根 ２ｄ 前縁部 ２ｈ 後縁部 ２Ｂ 圧力面側 ２Ｃ 負圧面側 ２ｅ 凸部 ２ｆ 基部 ２ｇ 翼端 ２ｊ 突起部 ２０ｄ 直線部 ２１ｄ 三角部 ２２ｄ 終端 ３ ボス部 Ａ、Ａ１、Ａ２、Ａ３ 羽根車 Reference Signs List 1 hub 2 blade 2d front edge 2h rear edge 2B pressure surface side 2C suction surface side 2e convex portion 2f base 2g blade tip 2j protrusion 20d linear portion 21d triangular portion 22d terminal end 3 boss portion A, A1, A2, A3 blade car
Claims (5)
付け角度で複数枚の羽根を設け、前記各羽根の前縁部近
傍に複数個の凸部を前記ハブの基部から羽根の翼端まで
の全域に所定間隔で配設して構成した送風機用羽根車。1. A plurality of blades are provided around a substantially frustoconical hub at a predetermined mounting angle, and a plurality of protrusions are provided near a front edge of each blade from the base of the hub to the blade tip of the blade. An impeller for a blower that is arranged at predetermined intervals in the entire area up to.
圧力面側の前縁部近傍の両面に、複数個の凸部を前記ハ
ブの基部から羽根の翼端までの全域に所定間隔で配設し
て構成した請求項１記載の送風機用羽根車。2. A plurality of projections are provided on both sides of the blade near the leading edge on the negative pressure side and near the leading edge on the pressure side, all over the entire area from the base of the hub to the blade tip of the blade. The impeller for a blower according to claim 1, wherein the impeller is arranged at intervals.
付け角度で複数枚の羽根を設け、前記各羽根の前縁部が
ハブから半径方向外向きに向かう直線部と、前記直線部
の終端と翼端間では回転方向に頂点を持つ三角部から構
成される羽根車において、前記各羽根の負圧面側で前記
三角部の前縁部近傍に複数個の突起部を所定間隔で配設
し、さらに前記各羽根の負圧面側で前記直線部の前縁部
近傍に複数個の凸部を所定間隔で配設して構成した請求
項１記載の送風機用羽根車。3. A plurality of blades are provided around a hub having a substantially truncated cone shape at a predetermined mounting angle, and a front edge portion of each of the blades extends radially outward from the hub. In an impeller composed of a triangular portion having an apex in the rotation direction between the terminal end and the blade tip, a plurality of protrusions are arranged at predetermined intervals near the leading edge of the triangular portion on the suction side of each blade. 2. The impeller for a blower according to claim 1, wherein a plurality of projections are arranged at predetermined intervals on the suction side of each of said blades near the front edge of said linear portion.
付け角度で複数枚の羽根を設け、前記各羽根の前縁部が
ハブから半径方向外向きに向かう直線部と、前記直線部
の終端と翼端間では回転方向に頂点を持つ三角部から構
成される羽根車において、前記各羽根の負圧面側で前記
三角部の前縁部近傍、および圧力面側で前記三角部の前
縁部近傍の両面に複数個の突起部を所定間隔で配設し、
さらに前記各羽根の負圧面側で前記直線部の前縁部近
傍、および圧力面側で前記直線部の前縁部近傍の両面に
複数個の凸部を所定間隔で配設して構成した請求項１記
載の送風機用羽根車。4. A plurality of blades are provided around a substantially frustoconical hub at a predetermined mounting angle, and a front edge portion of each of the blades extends radially outward from the hub. In an impeller comprising a triangular portion having an apex in the rotation direction between the terminal end and the blade tip, a portion near the leading edge of the triangular portion on the suction side and a leading edge of the triangular portion on the pressure side. A plurality of protrusions are arranged at predetermined intervals on both sides near the part,
Further, a plurality of protrusions are arranged at predetermined intervals on both sides near the leading edge of the linear portion on the negative pressure surface side of each blade and near the leading edge of the linear portion on the pressure surface side. Item 7. An impeller for a blower according to Item 1.
のハブを設けた請求項１〜４いずれかに記載の送風機用
羽根車。5. The impeller for a blower according to claim 1, wherein a hub having a substantially cylindrical shape is provided instead of the hub having a substantially frustoconical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36464799A JP2001182689A (en) | 1999-12-22 | 1999-12-22 | Impeller for air blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36464799A JP2001182689A (en) | 1999-12-22 | 1999-12-22 | Impeller for air blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001182689A true JP2001182689A (en) | 2001-07-06 |
Family
ID=18482326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36464799A Pending JP2001182689A (en) | 1999-12-22 | 1999-12-22 | Impeller for air blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001182689A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003278696A (en) * | 2002-03-26 | 2003-10-02 | Fuji Electric Co Ltd | Propeller fan |
| KR100429998B1 (en) * | 2001-10-25 | 2004-05-03 | 엘지전자 주식회사 | Turbo fan |
| KR100429997B1 (en) * | 2001-10-25 | 2004-05-03 | 엘지전자 주식회사 | Turbo fan |
| JP2008038698A (en) * | 2006-08-03 | 2008-02-21 | Shin Meiwa Ind Co Ltd | Impeller and submerged mixer |
| JP2008069709A (en) * | 2006-09-14 | 2008-03-27 | Topre Corp | Impeller for centrifugal fan |
| EP3299631A1 (en) * | 2016-09-21 | 2018-03-28 | Samsung Electronics Co., Ltd. | Propeller fan and air conditioner having the same |
| KR101876162B1 (en) * | 2018-04-04 | 2018-07-06 | 서울대학교산학협력단 | Centrifugal Pump Impeller Having Wing Serration Structures |
| KR101887851B1 (en) * | 2018-04-04 | 2018-08-10 | 서울대학교산학협력단 | Centrifugal Pump Impeller Having Humpback Whale's Tubercles Structure |
| WO2019240360A1 (en) * | 2018-06-12 | 2019-12-19 | 엘지전자 주식회사 | Ceiling fan and method for assembling same |
| KR20190140822A (en) * | 2018-06-12 | 2019-12-20 | 엘지전자 주식회사 | Ceiling fan and assembling method thereof |
| CN112727793A (en) * | 2021-01-11 | 2021-04-30 | 泛仕达机电股份有限公司 | Blade with bionic front edge and axial flow wind wheel comprising blade |
-
1999
- 1999-12-22 JP JP36464799A patent/JP2001182689A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100429998B1 (en) * | 2001-10-25 | 2004-05-03 | 엘지전자 주식회사 | Turbo fan |
| KR100429997B1 (en) * | 2001-10-25 | 2004-05-03 | 엘지전자 주식회사 | Turbo fan |
| JP2003278696A (en) * | 2002-03-26 | 2003-10-02 | Fuji Electric Co Ltd | Propeller fan |
| JP2008038698A (en) * | 2006-08-03 | 2008-02-21 | Shin Meiwa Ind Co Ltd | Impeller and submerged mixer |
| JP2008069709A (en) * | 2006-09-14 | 2008-03-27 | Topre Corp | Impeller for centrifugal fan |
| EP3299631A1 (en) * | 2016-09-21 | 2018-03-28 | Samsung Electronics Co., Ltd. | Propeller fan and air conditioner having the same |
| KR20180031948A (en) * | 2016-09-21 | 2018-03-29 | 삼성전자주식회사 | Propeller fan and air conditioner having the same |
| KR102600955B1 (en) * | 2016-09-21 | 2023-11-13 | 삼성전자주식회사 | Propeller fan and air conditioner having the same |
| KR101887851B1 (en) * | 2018-04-04 | 2018-08-10 | 서울대학교산학협력단 | Centrifugal Pump Impeller Having Humpback Whale's Tubercles Structure |
| WO2019194372A1 (en) * | 2018-04-04 | 2019-10-10 | 서울대학교산학협력단 | Centrifugal pump impeller having serration structure applied thereto |
| KR101876162B1 (en) * | 2018-04-04 | 2018-07-06 | 서울대학교산학협력단 | Centrifugal Pump Impeller Having Wing Serration Structures |
| WO2019240360A1 (en) * | 2018-06-12 | 2019-12-19 | 엘지전자 주식회사 | Ceiling fan and method for assembling same |
| KR20190140822A (en) * | 2018-06-12 | 2019-12-20 | 엘지전자 주식회사 | Ceiling fan and assembling method thereof |
| KR102141435B1 (en) * | 2018-06-12 | 2020-08-05 | 엘지전자 주식회사 | Ceiling fan and assembling method thereof |
| US11506213B2 (en) | 2018-06-12 | 2022-11-22 | Lg Electronics Inc. | Ceiling fan and assembling method thereof |
| CN112727793A (en) * | 2021-01-11 | 2021-04-30 | 泛仕达机电股份有限公司 | Blade with bionic front edge and axial flow wind wheel comprising blade |
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