JPH0663514B2 - Mixed flow impeller - Google Patents
Mixed flow impellerInfo
- Publication number
- JPH0663514B2 JPH0663514B2 JP12427987A JP12427987A JPH0663514B2 JP H0663514 B2 JPH0663514 B2 JP H0663514B2 JP 12427987 A JP12427987 A JP 12427987A JP 12427987 A JP12427987 A JP 12427987A JP H0663514 B2 JPH0663514 B2 JP H0663514B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- mixed flow
- flow impeller
- edge portion
- wedge
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、家庭用、工業用の空気調和機に広く用いられ
ている斜流羽根車に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed flow impeller that is widely used in domestic and industrial air conditioners.
従来の技術 従来この種の斜流羽根車は、第３図に示すように、略円
錐台形のハブ１の外周面に羽根２を配設して構成されて
いた。この羽根２の断面AAは第４図に示すように、前縁
部３と後縁部４をくさび形にとがらせて成形されてお
り、設計動作状態では、前縁部３の入口角度に沿って流
れが流入するように設計されている。2. Description of the Related Art Conventionally, as shown in FIG. 3, a mixed flow impeller of this kind has been constructed by arranging blades 2 on an outer peripheral surface of a hub 1 having a substantially truncated cone shape. As shown in FIG. 4, the cross section AA of the blade 2 is formed by wedge-shaped the leading edge portion 3 and the trailing edge portion 4, and in the design operation state, along the inlet angle of the leading edge portion 3. Are designed to flow in.
発明が解決しようとする問題点 しかしながら上記のような構成では、羽根の入口角と羽
根車に流入する流れの向きが一致していればスムーズな
羽根に沿った流入状態が保たれるが、流量の変化や上流
側の乱れなどにより、流入方向が羽根の入口角と合わな
くなった場合にはすぐに羽根前縁部で剥離を起こし、送
風効率の低下や騒音レベルの上昇につながるという問題
点を有していた。Problems to be Solved by the Invention However, in the above configuration, if the inlet angle of the blade and the direction of the flow flowing into the impeller match, the smooth inflow state along the blade is maintained, but the flow rate is If the inflow direction does not match the inlet angle of the blade due to changes in the air flow, turbulence on the upstream side, etc., separation will occur immediately at the blade's leading edge, leading to a reduction in blowing efficiency and an increase in noise level. Had.
本発明はかかる従来の問題を解消するもので、空力学的
に良好な性能を示すとともに空力騒音も低く抑えた斜流
羽根車を提供することを目的とするものである。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a mixed flow impeller exhibiting good aerodynamic performance and suppressing aerodynamic noise.
問題点を解決するための手段 上記問題点を解決するために、本発明の斜流羽根車は、
略円錐台形のハブの周囲に複数枚の薄肉の羽根を備え、
前記羽根は前縁部が羽根の厚さよりも大きい略円弧状の
断面形状を有し、後縁部がくさび形の断面形状を持つよ
うに成形されている。Means for Solving the Problems In order to solve the above problems, the mixed flow impeller of the present invention is
Equipped with multiple thin blades around the hub of a substantially truncated cone
The blade has a front edge portion having a substantially arcuate cross-sectional shape larger than the thickness of the blade and a rear edge portion having a wedge-shaped cross-sectional shape.
作 用 本発明は上記した構成によって、羽根前縁の断面形状を
羽根厚よりも大きくとり、かつ、略円弧状の滑らかな形
にしてあるため、吸込み流れの方向の羽根の入口角が多
少くいちがっていても剥離を起こしにくくなっている。
また、後縁部はくさび形の断面形状に成形されているた
め、後流渦の発生を小さく抑えることができる。Operation According to the present invention, since the cross-sectional shape of the blade leading edge is larger than the blade thickness and has a substantially arcuate smooth shape, the inlet angle of the blade in the suction flow direction is slightly reduced. Even if it is wrong, peeling is less likely to occur.
Further, since the trailing edge portion is formed in a wedge-shaped cross-sectional shape, the generation of wake vortices can be suppressed to a small level.
したがって、前縁から後縁までの流れの乱れを小さくす
ることができ、送風効率の低下や空力騒音の発生を少な
く抑えることが可能になる。Therefore, it is possible to reduce the turbulence of the flow from the leading edge to the trailing edge, and it is possible to reduce the reduction of the blowing efficiency and the generation of aerodynamic noise.
実施例 以下本発明の実施例を添付図面にもとづいて説明する。
なお、従来例と同じ部分には同じ番号を付した。Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.
The same parts as those in the conventional example are denoted by the same reference numerals.
第１図、第２図において、１が略円錐台形のハブで、こ
のハブの外周面に羽根12が複数枚配設されている。この
羽根12のＢ−Ｂ線断面図は第２図に示すように、前縁部
13は羽根12の厚さよりも大きい略円弧状に成形され、後
縁部14はくさび形に成形されている。In FIGS. 1 and 2, 1 is a hub having a substantially truncated cone shape, and a plurality of blades 12 are arranged on the outer peripheral surface of the hub. A cross-sectional view of the blade 12 taken along the line BB is shown in FIG.
The blade 13 is formed in a substantially arc shape larger than the thickness of the blade 12, and the trailing edge portion 14 is formed in a wedge shape.
上記の断面形状を有する羽根を備えた羽根車の場合、羽
根の入口角に対して少しずれた角度で流れが流入して
も、曲率半径の大きな前縁に沿って空気が流れるので、
前縁部13での剥離が抑えられ、剥離による送風効率の低
下や騒音の発生が小さくなる。また、後縁がくさび形に
成形されているため、後流渦の発生が少なくなり、渦の
放出による騒音発生も小さく抑えられる。In the case of an impeller provided with blades having the above-mentioned cross-sectional shape, even if the flow enters at an angle slightly deviated from the entrance angle of the blades, the air flows along the front edge with a large radius of curvature,
The peeling at the front edge portion 13 is suppressed, and the reduction of the ventilation efficiency and the generation of noise due to the peeling are reduced. Further, since the trailing edge is formed in a wedge shape, the generation of wake vortices is reduced, and the generation of noise due to the discharge of vortices is also suppressed.
発明の効果 以上のように本発明の斜流羽根車によれば、羽根前縁部
の断面形状を薄肉の羽根よりも厚い、略円弧状に成形し
てあるため、羽根の入口角と吸込み流れの方向が多少ず
れていても、前縁部での剥離を起こしにくくなってい
る。したがって、広い範囲の動作点、あるいは、吸込み
流れの乱れに対しても、前縁部で剥離を起こすことな
く、羽根に沿ったスムーズな流入を実現することができ
る。As described above, according to the mixed flow impeller of the present invention, since the cross-sectional shape of the blade leading edge portion is formed into a substantially arc shape which is thicker than the thin blade, the blade inlet angle and suction flow Even if the direction of is slightly deviated, peeling at the front edge is less likely to occur. Therefore, even if the operating point is in a wide range or the suction flow is disturbed, a smooth inflow along the blade can be realized without causing separation at the leading edge portion.
さらに、後縁部はくさび形の断面形状に成形してあるの
で、後流渦の発生が少なくなり、流れの剥離や渦の放出
による空力騒音の発生を抑制することができる。Furthermore, since the trailing edge portion is formed in a wedge-shaped cross-sectional shape, the generation of wake vortices is reduced, and the generation of aerodynamic noise due to flow separation and vortex discharge can be suppressed.
第１図は本発明の一実施例における斜流羽根車の斜視
図、第２図は第１図のＢ−Ｂ線断面図、第３図は従来の
この種の斜流羽根車の斜視図、第４図は第３図のＡ−Ａ
線断面図である。 １……ハブ、12……羽根、13……前縁部、14……後縁
部。FIG. 1 is a perspective view of a mixed flow impeller according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line BB of FIG. 1, and FIG. 3 is a perspective view of a conventional mixed flow impeller of this type. , FIG. 4 is AA of FIG.
It is a line sectional view. 1 ... Hub, 12 ... Blade, 13 ... Front edge, 14 ... Rear edge.
Claims (1)
羽根を備え、前記羽根は、前縁部が羽根の厚さよりも大
きい略円弧状の断面形状を有し、後縁部がくさび形の断
面形状を持つ斜流羽根車。1. A plurality of thin blades are provided around a substantially frustoconical hub, and the blade has a substantially arcuate cross-sectional shape whose front edge is larger than the thickness of the blade, and whose rear edge is A mixed flow impeller with a wedge-shaped cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12427987A JPH0663514B2 (en) | 1987-05-21 | 1987-05-21 | Mixed flow impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12427987A JPH0663514B2 (en) | 1987-05-21 | 1987-05-21 | Mixed flow impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63289298A JPS63289298A (en) | 1988-11-25 |
| JPH0663514B2 true JPH0663514B2 (en) | 1994-08-22 |
Family
ID=14881406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12427987A Expired - Lifetime JPH0663514B2 (en) | 1987-05-21 | 1987-05-21 | Mixed flow impeller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663514B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4665472B2 (en) * | 2004-09-28 | 2011-04-06 | パナソニック株式会社 | Blower |
| WO2008050915A1 (en) * | 2006-10-24 | 2008-05-02 | Lg Electronics Inc. | High speed type impeller |
| JP5473457B2 (en) * | 2009-07-29 | 2014-04-16 | 三菱重工業株式会社 | Centrifugal compressor impeller |
| CN113738694B (en) * | 2021-08-25 | 2024-04-05 | 哈尔滨工业大学 | High-performance centrifugal impeller of breathing machine with round head-shaped front edge blade profile |
-
1987
- 1987-05-21 JP JP12427987A patent/JPH0663514B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63289298A (en) | 1988-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070822 Year of fee payment: 13 |