JPS63289298A - Diagonal flow impeller - Google Patents
Diagonal flow impellerInfo
- Publication number
- JPS63289298A JPS63289298A JP12427987A JP12427987A JPS63289298A JP S63289298 A JPS63289298 A JP S63289298A JP 12427987 A JP12427987 A JP 12427987A JP 12427987 A JP12427987 A JP 12427987A JP S63289298 A JPS63289298 A JP S63289298A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- generation
- reduced
- wedge
- front 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.)
- Granted
Links
- 238000007664 blowing Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mixed flow impeller widely used in home and industrial air conditioners.
従来の技術
従来の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 As shown in FIG. 3, a conventional mixed flow impeller of this type has a substantially truncated conical hub 1 with blades 2 disposed on the outer peripheral surface thereof. The cross section AA of this blade 2 is as shown in FIG.
The leading edge 3 and the trailing edge 4 are wedge-shaped and designed so that, in the designed operating state, the flow enters along the inlet angle of the leading edge 3.
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
側の乱れなどだよ）、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, with the above configuration, if the inlet angle of the blades matches the direction of the flow flowing into the impeller, a smooth inflow state along the blades can be maintained, but the flow rate is If the inflow direction does not match the inlet angle of the blade, the front edge of the blade will immediately peel off, leading to a decrease in air blowing efficiency and an increase in noise level. It had a point.
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 is intended to solve these conventional problems, and aims to provide a mixed flow impeller that exhibits good aerodynamic performance and suppresses aerodynamic noise to a low level.
問題点を解決するだめの手段
上記問題点を解決するために１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シ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 has the following features:
Equipped with multiple thin blades around a roughly truncated conical hub,
The blade has a front edge having a generally arcuate cross-sectional shape that is larger than the thickness of the blade, and a rear edge having a wedge-shaped cross-section.
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
羽根厚よシも大きくとシ、がっ、略円弧状の滑らかな形
にしであるため、吸込み流れの方向と羽根の入口角が多
少くいちがっていても剥離を起こしにくくなっている。Effect of the Invention With the above-described configuration, the cross-sectional shape of the leading edge of the blade is made larger than the thickness of the blade, and the cross-sectional shape is approximately arcuate and smooth, so that the direction of the suction flow and the inlet angle of the blade are It is less likely to peel off even if it is slightly scratched.
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。Further, since the trailing edge portion is formed into a wedge-shaped cross-sectional shape, generation of trailing 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, turbulence in the flow from the leading edge to the trailing edge can be reduced, making it possible to suppress a decrease in air 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。Example Embodiments of the present invention will be described below based on the accompanying drawings.
なお、従来例と同じ部分には同じ番号を付した。Note that the same parts as in the conventional example are given the same numbers.
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込る。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の厚さよシ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, reference numeral 1 denotes a substantially truncated conical hub, and a plurality of blades 12 are arranged on the outer peripheral surface of this hub. As shown in FIG. 2, a cross-sectional view of the blade 12 taken along line B-B shows that the leading edge 13 is formed into a substantially circular arc shape, which is larger than the thickness of the blade 12, and the trailing edge 14 is formed into a wedge shape. There is.
上記の断面形状を有する羽根をグｈ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 with blades having the above cross-sectional shape,
Even if the air flows in at a slightly different angle from the inlet angle of the blade, the air flows along the leading edge with a large radius of curvature.
Peeling at the front edge portion 13 is suppressed, and a decrease in air blowing efficiency and generation of noise due to the peeling are reduced. In addition, since the trailing edge is shaped into a wedge shape, the generation of trailing vortices is reduced, and noise generation due to the release of vortices is also suppressed.
発明の効果
以と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
であるため、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１雛を起こすことなく
、羽根に沿ったスムーズな流入を実現することができる
。According to the mixed flow impeller of the present invention, the cross-sectional shape of the leading edge of the blade is formed into a substantially circular arc shape that is thicker than that of a thin-walled blade, so that the inlet angle of the blade and the suction Even if the flow direction is slightly deviated, separation at the leading edge is less likely to occur. Therefore, even under a wide range of operating points or turbulence in the suction flow, smooth inflow along the blade can be realized without causing peeling at the leading edge.
さらに、後縁部はくさび形の断面形状に成形しであるの
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。Further, since the trailing edge portion is formed into 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 release 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。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名１−
−−ハブ
／２−−−：１１根
第１図 １３−荊橡者さ
１４−一一後絶］も
第２図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 B-B in FIG. 1, and FIG. 3 is a perspective view of a conventional mixed flow impeller of this type. , FIG. 4 is a sectional view taken along line A--A in FIG. 3. 1...Hub, 12...Blade, 13...
...Front edge, 14...Rear edge. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
--Hub / 2 ---: 11 Roots Figure 1 13-Jingyushasa 14-11 Afterlife] is also Figure 2
Claims (1)
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。Equipped with multiple thin blades around a roughly truncated conical hub,
The blade is a mixed flow impeller in which the leading edge has a substantially arc-shaped cross-sectional shape that is larger than the thickness of the blade, and the trailing edge has a wedge-shaped cross-sectional shape.
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 true JPS63289298A (en) | 1988-11-25 |
| JPH0663514B2 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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097488A (en) * | 2004-09-28 | 2006-04-13 | Matsushita Electric Ind Co Ltd | Blower |
| WO2008050915A1 (en) * | 2006-10-24 | 2008-05-02 | Lg Electronics Inc. | High speed type impeller |
| EP2461041A4 (en) * | 2009-07-29 | 2018-06-06 | Mitsubishi Heavy Industries, Ltd. | Impeller of centrifugal compressor |
| CN113738694A (en) * | 2021-08-25 | 2021-12-03 | 哈尔滨工业大学 | High-performance centrifugal impeller with round-head-shaped front edge blade profile for respirator |
-
1987
- 1987-05-21 JP JP12427987A patent/JPH0663514B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097488A (en) * | 2004-09-28 | 2006-04-13 | Matsushita Electric Ind Co Ltd | Blower |
| 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 |
| US8142160B2 (en) | 2006-10-24 | 2012-03-27 | Lg Electronics Inc. | High speed type impeller having a reinforcing ring |
| EP2461041A4 (en) * | 2009-07-29 | 2018-06-06 | Mitsubishi Heavy Industries, Ltd. | Impeller of centrifugal compressor |
| CN113738694A (en) * | 2021-08-25 | 2021-12-03 | 哈尔滨工业大学 | High-performance centrifugal impeller with round-head-shaped front edge blade profile for respirator |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0663514B2 (en) | 1994-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070822 Year of fee payment: 13 |