JPS63170595A - Blower - Google Patents

Abstract

PURPOSE:To provide possibility of using the arrangement with higher pressure by locating the internal end of guide vanes innermore than the bore of impeller, wherein the guide vane is furnished between the impeller sub-plate and the casing, and by locating the external end outermore than the periphery. CONSTITUTION:Guide vanes 13 are furnished between the sub-plate 18 of an impeller 11 and the casing 12. The internal end 14 of these guide vanes 13 is located innermore than the bore of the impeller 11, while the external end 15 outermore than the periphery. The suction hole 16 of the casing 12 is formed smaller than the inside dia. of the impeller 11. The circulative air stream flowing in the casing flows along the guide vane 13 to be led to the central part, and flows into the impeller to provide effective flow. Thus higher pressurization is accomplished by itterative passages of part of the stream through the impeller.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、燃焼器のバーナファンなど高圧乞必要とする
用途に使われる、遠心羽根車を用いた送風装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air blowing device using a centrifugal impeller, which is used in applications requiring high pressure, such as burner fans for combustors.

従来の技術 従来のこの種の送風装置は、第３図に示すように、第１
の羽根車１と第２の羽根車２を同軸で重ね合わせ、両者
の間に案内羽根３を設けた多段の構成をとっていた。こ
のような構成において、モータ４の駆動力で第１の羽根
車１と第２の羽根車２を回転させると、吸入口５から流
入した空気は。2. Description of the Related Art A conventional blower device of this type has a first air blower as shown in FIG.
The impeller 1 and the second impeller 2 were coaxially stacked one on top of the other, and a guide vane 3 was provided between them to form a multi-stage structure. In such a configuration, when the first impeller 1 and the second impeller 2 are rotated by the driving force of the motor 4, the air flowing in from the suction port 5 is rotated.

まず、第１の羽根車１によって昇圧され、高圧になった
気流が案内羽根３によって第２の羽根車２の中心部へ導
かれる。流入空気は第２の羽根車２で再び昇圧され、さ
らに高圧となり、吐出口６から送り出される。First, the pressure of the airflow is increased by the first impeller 1 and the high pressure airflow is guided to the center of the second impeller 2 by the guide vanes 3. The incoming air is pressurized again by the second impeller 2, becomes even higher in pressure, and is sent out from the discharge port 6.

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、同軸上に羽根車を重ねる
ために、複数個の羽根車が必要になり。Problems to be Solved by the Invention However, in the above configuration, a plurality of impellers are required in order to overlap the impellers on the same axis.

かつ、送風機の軸方向の厚さも大きくなる。さらに羽根
車を回転させるモータ軸が長くなるため、片持ちの回転
軸では振動が大きくなるという問題点を有していた。Moreover, the thickness of the blower in the axial direction also increases. Furthermore, since the motor shaft for rotating the impeller becomes long, a cantilevered rotating shaft has the problem of increased vibration.

本発明はかかる従来の問題点を解消するもので、単段構
成の送風装置で十分な高圧を得ること金目的とする。The present invention solves these conventional problems and aims to obtain a sufficiently high pressure with a single-stage blower.

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１本発明の送風装置は、主
板と副板の間に複数の羽根を有する羽根車と、前記羽根
車を収納し１羽根車から吐出された流れを一方向へ導く
ケーシングと、前記羽根車を！に動するモータを備え、
前記ケーシングの羽根車両板と対向する面に設けられた
吸入口を羽根車の内経よりも小さくするとともに、前記
羽根車の副板と対向する前記ケーシングの内面に複数の
案内羽根を設け、前記案内羽根の内周端は羽根車の内経
よりも内側に、外周端は羽根車の外経よりも外側に位置
するように形成した構成をとっている。Means for Solving the Problems In order to solve the above-mentioned problems, the blower device of the present invention includes an impeller having a plurality of blades between a main plate and a sub-plate, and an air blower that stores the impeller and blows air from the impeller. A casing that guides the flow in one direction and the impeller! Equipped with a motor that moves to
The suction port provided on the surface of the casing facing the impeller vehicle plate is made smaller than the inner diameter of the impeller, and a plurality of guide vanes are provided on the inner surface of the casing facing the sub-plate of the impeller, and the The inner peripheral end of the guide vane is located inside the inner diameter of the impeller, and the outer peripheral end is located outside the outer diameter of the impeller.

作　　用 本発明は上記した構成によって、羽根車で昇圧され、ケ
ーシング内を流れる吐出突気の一部が、ケーシングのデ
ィフューザ部へ張り出した案内羽根に沿って、羽根車副
板とケーシングの間を通り、羽根車の中央部へ導かれる
。羽根車の中央部ではケーシングの吸気口から流入する
外部の流れと、案内羽根に沿って流れてきた循環流が合
流し、再び羽根車を通過する流れとなる。ここで、吸入
口の日経を羽根車の内経より小さくシ、かつ、案内羽根
の内周端が羽根車内経よりも内側へ位置するように構成
しているため、循環流は外部からの流れと衝突すること
なく羽根車へ再流入することができ、また、案内羽根の
内周端部分を循環流れに対する前置静児として活用する
ことによって、効率の良い循環流れを実現することがで
きる。Effect of the Invention With the above-described configuration, the present invention allows a part of the discharged air that is pressurized by the impeller and flows inside the casing to pass between the impeller sub-plate and the casing along the guide vanes that protrude toward the diffuser part of the casing. street, guided to the central part of the impeller. At the center of the impeller, the external flow flowing in from the intake port of the casing and the circulating flow that has flowed along the guide vanes merge to form a flow that passes through the impeller again. Here, the diameter of the suction port is smaller than the inner diameter of the impeller, and the inner circumferential end of the guide vane is located inside the inner diameter of the impeller, so the circulating flow is a flow from the outside. It is possible to re-enter the impeller without colliding with the flow, and by using the inner circumferential end portion of the guide vane as a prefix for the circulation flow, efficient circulation flow can be realized.

以上のように、ケーシング内で羽根車を反復通過する流
れ全効率良く生じさせることによって、多段と同様の効
果を生み出し、高い吐出圧を得ることができる。As described above, by generating a flow that repeatedly passes through the impeller within the casing with high efficiency, it is possible to produce an effect similar to that of a multi-stage system and obtain a high discharge pressure.

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は羽根車、１２はケー
シング、１３は案内羽根で、この案内羽根１３の内周端
１４は羽根車１１の内経よりも内側に、外周端１５は外
経よりも外ｌ１１１に位置するように、ケーシング１２
の内面に固定されている。また、ケーシング１２に設け
られた吸入口１６は羽根車１１の内経よりも小さく形成
されている。羽根車１１は主板１７と副板１８の間に複
数の羽根１９を設けた構造で、モータ２０の回転１咄に
取付けられている。Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, 11 is an impeller, 12 is a casing, and 13 is a guide vane. The inner peripheral end 14 of this guide vane 13 is inside the inner diameter of the impeller 11, and the outer peripheral end 15 is outside. the casing 12 so that it is located on the outer side l111 than the
is fixed on the inner surface of. Further, the suction port 16 provided in the casing 12 is formed to be smaller than the inner diameter of the impeller 11. The impeller 11 has a structure in which a plurality of blades 19 are provided between a main plate 17 and a sub-plate 18, and is attached to the motor 20 for one rotation.

上記の構成において、羽根車１１を回転させると、ケー
シング１２の吸気口１６より流入した空気は羽根車１１
の作用で昇圧されてケーシング１２内に吐出される。ケ
ーシング内を流れる空気の一部は、矢印Ａで示し之よう
に、案内羽根１３に沿って流れ、羽根車１１とケーシン
グ１２の間を通って中央部へ等が詐る。この循環流れは
、羽根車１１の内経位置において矢印Ｂで示したように
再び羽根車１１へ流入する。In the above configuration, when the impeller 11 is rotated, the air flowing in from the intake port 16 of the casing 12 is transferred to the impeller 11.
The pressure is increased by the action of , and it is discharged into the casing 12 . A part of the air flowing inside the casing flows along the guide vanes 13 as shown by arrow A, passes between the impeller 11 and the casing 12, and is diverted to the center. This circulating flow flows into the impeller 11 again as shown by arrow B at the inner meridian position of the impeller 11.

一方、外部から流入する流れは、ケーシング１２の吸入
口１６が羽根車１１の内経よりも小さく設定されている
ため、矢印Ｃで示したように、前述の循環流れと衝突す
ることなく１羽根車１１へ流入することができる。On the other hand, since the inlet port 16 of the casing 12 is set smaller than the inner diameter of the impeller 11, the flow flowing in from the outside can flow through one impeller without colliding with the above-mentioned circulating flow, as shown by arrow C. It can flow into the car 11.

このように１羽根車からの吐出流の一部が繰返し羽根車
を通過する循環流が効率良く形成されるため、単段構成
で多段と同様の効果を生じ、高圧を得ることができる。In this way, a circulating flow in which a part of the discharge flow from one impeller repeatedly passes through the impeller is efficiently formed, so that a single-stage configuration can produce the same effect as a multi-stage configuration, and high pressure can be obtained.

発明の効果 以上のように本発明の送風装置によれば、羽根車副板と
ケーシングの間に案内羽根を設けであるため、羽根車か
らの吐出流れの一部がこの案内羽根によって中央部へ導
かれ、再び羽根車を通過する循環流が生じる。また、ケ
ーシングの吸入口を羽根車内経よりも小さくシ、かつ、
案内羽根の内周端を羽根車内経より内側に、外周端を外
経より外側に位置させであることにより、吐出流の一部
をスムーズに羽根車中央部へ導き、外部からの流入流れ
と衝突させることなく、効率良く循環流を形成すること
ができる。したがって、流れの一部が羽根車を反復通過
することによって、単段構成の薄形という利点を生かし
ながら、多段ＰＩη成と同様の高圧を得られるという効
果がある。Effects of the Invention As described above, according to the blower of the present invention, since the guide vanes are provided between the impeller sub-plate and the casing, a part of the flow discharged from the impeller is directed to the central part by the guide vanes. A circulating flow is created which is guided and passes through the impeller again. In addition, the suction port of the casing is made smaller than the inner diameter of the impeller, and
By locating the inner circumferential end of the guide vane inside the impeller's internal diameter and its outer circumferential end outward from the impeller's outer diameter, a part of the discharge flow is smoothly guided to the impeller center, and the inflow flow from the outside is separated from the outside. A circulating flow can be efficiently formed without collision. Therefore, by repeatedly passing a portion of the flow through the impeller, there is an effect that a high pressure similar to that of the multi-stage PIη configuration can be obtained while taking advantage of the thinness of the single-stage configuration.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例における送風装置の断面図、
第２図は第１図のａ　−ａ線断面図、第３図は従来の送
風装置の断面図である。 １１・・・・・・羽根車％　１２・・・・・・ケーシン
グ、、１３・・・・・・案内羽根、１４・・・・・・内
周端、１５・・・・・・外周端、１６・・・・・・吸入
口、１７・・・・・・主板、１８・・・・・・副板、１
９・・・・・・羽根、２０・・・・・・モータ。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名１１
−羽狙単 １４−内ｉ實 ／、５−−９１−用鳥 １６−吸２Ｄ ｒ７＝−′！Ｅ玖 １ｇ−一瞥３玖FIG. 1 is a sectional view of a blower device in an embodiment of the present invention;
FIG. 2 is a sectional view taken along line a-a in FIG. 1, and FIG. 3 is a sectional view of a conventional blower device. 11... Impeller% 12... Casing, 13... Guide vane, 14... Inner circumference end, 15... Outer circumference end , 16... Suction port, 17... Main plate, 18... Sub plate, 1
9...Blade, 20...Motor. Name of agent: Patent attorney Toshio Nakao and 1 other person11
- Feather single 14-inside i-real/, 5--91-bird 16-suction 2D r7=-'! Eku 1g - glance 3ku

Claims (1)

【特許請求の範囲】[Claims] 主板と副板の間に複数の羽根を有する羽根車と、前記羽
根車を収納し、羽根車から吐出された流れを一方向へ導
くケーシングと、前記羽根車を駆動するモータを備え、
前記ケーシングの羽根車副板と対向する面に設けられた
吸入口を羽根車の内経よりも小さくするとともに、前記
羽根車の副板と対向する前記ケーシングの内面に複数の
案内羽根を設け、前記案内羽根の内周端は羽根車の内経
よりも内側に、外周端は羽根車の外経よりも外側に位置
させた送風装置。An impeller having a plurality of blades between a main plate and a sub-plate, a casing that houses the impeller and guides the flow discharged from the impeller in one direction, and a motor that drives the impeller,
The suction port provided on the surface of the casing facing the impeller sub-plate is made smaller than the inner diameter of the impeller, and a plurality of guide vanes are provided on the inner surface of the casing facing the impeller sub-plate, The inner peripheral end of the guide vane is located inside the inner diameter of the impeller, and the outer peripheral end is located outside the outer diameter of the impeller.