JPH0663515B2 - Impeller - Google Patents
ImpellerInfo
- Publication number
- JPH0663515B2 JPH0663515B2 JP125387A JP125387A JPH0663515B2 JP H0663515 B2 JPH0663515 B2 JP H0663515B2 JP 125387 A JP125387 A JP 125387A JP 125387 A JP125387 A JP 125387A JP H0663515 B2 JPH0663515 B2 JP H0663515B2
- Authority
- JP
- Japan
- Prior art keywords
- blades
- hub
- impeller
- projection surface
- blade
- 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、空調機器に広く用いられている軸流や斜流の
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 an axial flow or mixed flow impeller that is widely used in air conditioners.
従来の技術 従来のこの種の羽根車は第３図に示すように、略円錐台
形のハブ１の周壁面上に複数の同形の羽根２を設けた構
造で、オリフィスやケーシングなどの適当なケーシング
と組み合せて、回転させることによって送風作用を行な
っていた。また、羽根相互の重なりをなくし、かつ、ハ
ブと羽根とが重なるところではハブに切り欠き３を設
け、羽根車の一体成形を可能にしている。2. Description of the Related Art As shown in FIG. 3, a conventional impeller of this type has a structure in which a plurality of blades 2 of the same shape are provided on a peripheral wall surface of a hub 1 having a substantially truncated cone shape, and an appropriate casing such as an orifice or a casing. In combination with this, it was used to blow air. Further, the vanes are not overlapped with each other, and the notch 3 is provided in the hub where the hub and the vanes overlap each other, so that the impeller can be integrally formed.
一方、ハブに等間隔で羽根を設けた場合、羽根と周囲の
固定物の干渉によって生じる羽根回転音（NZ音）が顕著
に発生するため、第４図に示すように、周方向に不等間
隔で羽根４を設けた不等ピッチ羽根車も作られていた。On the other hand, when the hub is provided with blades at equal intervals, the blade rotating sound ( NZ sound) generated by the interference between the blade and the surrounding fixed object is remarkably generated. Therefore, as shown in FIG. An unequal pitch impeller provided with blades 4 at equal intervals was also made.
発明が解決しようとする問題点 しかしながら上記の構成では、ハブのまわりに不等間隔
に羽根を配置し、かつ、羽根相互の重なりをなくすため
には、羽根の投影面積を少なくする必要がある。すなわ
ち、等間隔の羽根配置で羽根の投影面積を最大にした羽
根形状を用いて不等間隔の羽根配置を実現する場合、羽
根枚数を減少しない限り、羽根と羽根の重なる部分が生
じ、一体成形が不可能となる。一方、羽根枚数を減らす
と一体成形は可能であるが、性能低下につながるという
問題点を有していた。Problems to be Solved by the Invention However, in the above configuration, it is necessary to reduce the projected area of the blades in order to arrange the blades around the hub at unequal intervals and prevent the blades from overlapping each other. In other words, when realizing a unequally spaced blade arrangement by using a blade shape that maximizes the projected area of the blade by equidistantly arranged blades, unless the number of blades is reduced, the overlapping portions of the blades will occur and the integral molding Is impossible. On the other hand, if the number of blades is reduced, it is possible to perform integral molding, but there is a problem that performance is deteriorated.
本発明はかかる従来の問題を解消するもので、性能低下
をまねくことなく、NZ音の低減を図り、かつ、一体成形
可能な羽根車を提供することを目的とする。The present invention solves such a conventional problem, and an object of the present invention is to provide an impeller capable of reducing NZ noise and integrally molding without lowering performance.
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羽根車は、略円筒
形あるいは略円錐台形のハブの周壁面上に複数の羽根を
不等間隔に設けるとともに、前記複数の羽根は回転軸に
垂直な平面への投影面形状の異なる羽根が混在し、か
つ、各羽根の投影面形状が互いに重なることなく、投影
面全体をほぼおおうように形成し、前記羽根の投影面形
状と前記ハブが重なる部分の前記ハブに切り欠きを設け
た構成をとっている。Means for Solving the Problems In order to solve the above problems, the impeller of the present invention is provided with a plurality of blades at unequal intervals on the peripheral wall surface of a hub having a substantially cylindrical shape or a truncated cone shape. Blades of different blades with different projection surface shapes on a plane perpendicular to the axis of rotation are mixed, and the projection surface shapes of the blades do not overlap with each other and are formed so as to cover the entire projection surface, and A notch is provided in the hub where the surface shape and the hub overlap.
作 用 本発明は上記した構成によって、投影面形状の異なる数
種類の羽根をハブの周壁面上に配設してあるため、羽根
の投影面積および形状を任意に選択することが可能にな
り、投影面積を最大に保ちながら不等間隔に羽根を配設
し、かつ、羽根の重なりをなくすことができる。したが
って、十分な空力性能を確保するとともに、一体成形が
可能な羽根車形状が得られる。Operation According to the present invention, because of the above-described configuration, several types of blades having different projection surface shapes are arranged on the peripheral wall surface of the hub, so that the projection area and shape of the blades can be arbitrarily selected. It is possible to arrange the blades at unequal intervals while keeping the maximum area, and to eliminate the overlapping of the blades. Therefore, it is possible to obtain an impeller shape capable of integrally molding while ensuring sufficient aerodynamic performance.
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。第１図、第２図において、11はハブで12〜16が羽根
である。５枚の羽根12〜16の投影面形状はいずれも略扇
形であるが、それぞれ、投影面形状が異なっており、略
扇形の中心角αは、おのおの、ほぼ60゜,65゜,70゜,80
゜,85゜になっている。ここで、中心角の合計がほぼ360
゜になっているため、すべての羽根が互いに重ならない
ようにハブの周壁面に配設することによって、投影面を
ほぼ100％カバーする最大の羽根面積が得られる。さら
に、羽根12〜16とハブ11の重なる部分では、ハブに切り
欠き17が設けられている。また、羽根12〜16の中心角が
上記の値になっているため、各羽根の取付け間隔は、6
2.5゜,67.5゜,75゜,82.5゜,72.5゜となり不等ピッチの
羽根配置になっている。Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, 11 is a hub and 12 to 16 are blades. Although the projection surface shape of each of the five blades 12 to 16 is substantially fan-shaped, the projection surface shape is different from each other, and the central angle α of the fan-shaped is approximately 60 °, 65 °, 70 °, 80
It becomes ゜, 85 ゜. Here, the total central angle is approximately 360
Due to the fact that all the blades are arranged on the peripheral wall surface of the hub so that they do not overlap each other, the maximum blade area that covers almost 100% of the projection surface can be obtained. Further, a notch 17 is provided in the hub at a portion where the blades 12 to 16 and the hub 11 overlap each other. Also, since the center angles of the blades 12 to 16 are the above values, the mounting interval of each blade is 6
The blades are arranged at 2.5 °, 67.5 °, 75 °, 82.5 °, 72.5 ° with unequal pitch.
上記の構成において、羽根面積は互いに重なりが生じな
い範囲でほぼ最大面積となっており、十分な送風性能が
得られるとともに、ハブに切り欠き17が設けられている
ため、一体成形も可能となっている。さらに、羽根の取
付けピッチが不等間隔になっているため、羽根と周辺の
固定物との干渉が不等周期で生じ、Nz音の発生が抑えら
れるという効果がある。In the above configuration, the blade area is almost the maximum area within the range where they do not overlap with each other, sufficient air blowing performance is obtained, and since the notch 17 is provided in the hub, integral molding is also possible. ing. Further, since the blades are mounted at unequal intervals, interference between the blades and a fixed object around the blades occurs at unequal cycles, which has the effect of suppressing Nz noise.
発明の効果 以上のように本発明の羽根車によれば次の効果が得られ
る。Effects of the Invention As described above, according to the impeller of the present invention, the following effects are obtained.
(1) 羽根をハブのまわりに不等ピッチで配設してある
のでNZ音を抑え、低騒音の羽根車が得られる。(1) Since the blades are arranged around the hub at an unequal pitch, the NZ noise is suppressed and a low noise impeller can be obtained.
(2) おのおのの羽根形状が異なっており、羽根車の投
影面全体をほぼおおい、かつ、互いに重ならないように
形成されているため、羽根面積が十分大きくなり、高性
能が得られるとともに、ハブに切り欠きを設けることに
よって一体成形も可能になっている。(2) Each blade has a different blade shape, and covers the entire projection surface of the impeller and does not overlap with each other, so the blade area is sufficiently large, high performance is obtained, and the hub is Integral molding is also possible by providing a notch in the.
第１図は本発明の一実施例における羽根車の平面図、第
２図は同羽根車の斜視図、第３図は従来の羽根車の平面
図、第４図は従来の他の羽根車の平面図である。 11……ハブ、12,13,14,15,16……羽根、17……切り欠
き。1 is a plan view of an impeller in one embodiment of the present invention, FIG. 2 is a perspective view of the same impeller, FIG. 3 is a plan view of a conventional impeller, and FIG. 4 is another conventional impeller. FIG. 11 …… Hub, 12,13,14,15,16 …… Vane, 17 …… Notch.
Claims (1)
面上に複数の羽根を不等間隔に設けるとともに、前記複
数の羽根は回転軸に垂直な平面への投影面形状の異なる
羽根が混在し、かつ、各羽根の投影面形状が互いに重な
ることなく、投影面全体をほぼおおうように形成し、前
記羽根の投影面形状と前記ハブが重なる部分の前記ハブ
に切り欠きを設けた羽根車。1. A plurality of blades are provided at unequal intervals on a peripheral wall surface of a hub having a substantially cylindrical shape or a truncated cone shape, and the plurality of blades have different projection surface shapes on a plane perpendicular to a rotation axis. A blade that is mixed and formed so that the projection surface shapes of the respective blades do not overlap each other and substantially covers the entire projection surface, and a cutout is provided in the hub at the portion where the projection surface shape of the blade and the hub overlap. car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP125387A JPH0663515B2 (en) | 1987-01-07 | 1987-01-07 | Impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP125387A JPH0663515B2 (en) | 1987-01-07 | 1987-01-07 | Impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63170589A JPS63170589A (en) | 1988-07-14 |
| JPH0663515B2 true JPH0663515B2 (en) | 1994-08-22 |
Family
ID=11496288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP125387A Expired - Lifetime JPH0663515B2 (en) | 1987-01-07 | 1987-01-07 | Impeller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663515B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2854586B2 (en) * | 1988-08-26 | 1999-02-03 | カルソニック株式会社 | Axial fan |
| JP4075264B2 (en) * | 2000-01-28 | 2008-04-16 | セイコーエプソン株式会社 | Axial fan, centrifugal fan, and electronic equipment using them |
-
1987
- 1987-01-07 JP JP125387A patent/JPH0663515B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63170589A (en) | 1988-07-14 |
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