JPH0893683A - Electric centrifugal blower - Google Patents
Electric centrifugal blowerInfo
- Publication number
- JPH0893683A JPH0893683A JP22796694A JP22796694A JPH0893683A JP H0893683 A JPH0893683 A JP H0893683A JP 22796694 A JP22796694 A JP 22796694A JP 22796694 A JP22796694 A JP 22796694A JP H0893683 A JPH0893683 A JP H0893683A
- Authority
- JP
- Japan
- Prior art keywords
- outer frame
- impeller
- centrifugal blower
- flow
- electric
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
(57)【要約】
【目的】 本発明は、性能の低下が小さく、コンパクト
な構造、低騒音化、電動機冷却の実現を図っている、外
枠構造と整流板を有する電動遠心送風機を提供すること
にある。
【構成】 モータ１０のハウジング１１の外周に外枠１
１０を設け、羽根車１３０の吐出流を第１のブラケット
１１２に形成された流路１５０を介してモータハウジン
グ１１と外枠１１０の間の流路１６０に案内する。流路
１５０には案内羽根が設けられて羽根車からの吐出流を
軽回させ、流路１１０に設けた整流板は流体Ａを軸方向
に案内し、機外へ吐出する。
【効果】 本発明によれば、性能の低下が小さく、コン
パクトな構造、低騒音化、電動機冷却の実現を図ってい
る、外枠構造と整流板を有する電動遠心送風機を提供す
ることが出来る。
(57) [Abstract] [PROBLEMS] The present invention provides an electric centrifugal blower having an outer frame structure and a rectifying plate, which is intended to realize a compact structure, low noise, and electric motor cooling with little deterioration in performance. Especially. [Structure] The outer frame 1 is provided around the housing 11 of the motor 10.
10 is provided to guide the discharge flow of the impeller 130 to the flow path 160 between the motor housing 11 and the outer frame 110 via the flow path 150 formed in the first bracket 112. The flow passage 150 is provided with guide vanes to lighten the discharge flow from the impeller, and the flow straightening plate provided in the flow passage 110 guides the fluid A in the axial direction and discharges it to the outside of the machine. According to the present invention, it is possible to provide an electric centrifugal blower having an outer frame structure and a rectifying plate, which has a small deterioration in performance, a compact structure, a low noise, and an electric motor cooling.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電動遠心送風機の全体
構成に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the entire structure of an electric centrifugal blower.
【０００２】[0002]
【従来の技術】従来の電動遠心送風機の構成を図１１，
図１２を用いて説明する。図１１は従来の遠心送風機の
構成例の外観図で、図１３は断面図である。全体を符号
１で示す送風機は、モータ１０と遠心送風機２０とを有
する。モータ１０は、ハウジング１１内に配設するステ
ータ１２と駆動軸１６と一体のロータ１４を有し、駆動
軸１６はケーシング１１の両端部に設けられるブラケッ
ト１７ａ，１７ｂに対してベアリング１６ａ，１６ｂを
介して回転自在に支持される。駆動軸１６の先端にはナ
ット１７により羽根車３０がとりつけられ、羽根車３０
を囲んでハウジング２２がボリュート２４と一体に設け
られる。2. Description of the Related Art The structure of a conventional electric centrifugal blower is shown in FIG.
This will be described with reference to FIG. FIG. 11 is an external view of a configuration example of a conventional centrifugal blower, and FIG. 13 is a sectional view. The blower generally indicated by reference numeral 1 has a motor 10 and a centrifugal blower 20. The motor 10 has a rotor 14 integrated with a stator 12 and a drive shaft 16 arranged in a housing 11, and the drive shaft 16 has bearings 16a and 16b for brackets 17a and 17b provided at both ends of the casing 11. It is rotatably supported via. An impeller 30 is attached to the tip of the drive shaft 16 by a nut 17,
A housing 22 is provided integrally with the volute 24 so as to surround the.
【０００３】ハウジング２２の中央には吸込口２２ａが
開口し、空気等の流体Ａを吸込む。流体Ａは、羽根車３
０により昇圧され、径方向に吐き出される。この流体Ａ
は案内板２３で内径方向へ案内され、さらに、羽根車３
２で昇圧されて減速流路であるボリュート部２４へ集め
られ、吐出口２６から吐出される。流速を適切に減速さ
せるため、ボリュート２４は徐々に断面積を増大させ、
遠心送風機外形は非対称となる。送風機の低騒音化の方
法は、筒状消音器を送風機吸込口２２ａ、あるいは送風
機吐出口２６に取り付け、吸音による消音を行ってい
る。電動機１０の冷却には、反負荷側軸端に取り付けら
れた外扇１８により負荷方向に送風Ａ1を行い、ハウジ
ング１１及び負荷側ブラケット１７ａ、反負荷側ブラケ
ット１７ｂの冷却を行っている。A suction port 22a is opened in the center of the housing 22 and sucks a fluid A such as air. Fluid A is impeller 3
It is boosted by 0 and discharged in the radial direction. This fluid A
Is guided in the inner diameter direction by the guide plate 23, and further, the impeller 3
The pressure is increased by 2 and is collected in the volute part 24 which is the deceleration flow path, and is discharged from the discharge port 26. The volute 24 gradually increases the cross-sectional area in order to reduce the flow velocity appropriately.
The outer shape of the centrifugal blower is asymmetric. As a method for reducing the noise of the blower, a cylindrical silencer is attached to the blower suction port 22a or the blower discharge port 26 to muffle the sound. For cooling the electric motor 10, the outer fan 18 attached to the anti-load side shaft end blows air A 1 in the load direction to cool the housing 11, the load side bracket 17a, and the anti-load side bracket 17b.
【０００４】[0004]
【発明が解決しようとする課題】上記の従来例におい
て、羽根車周囲には羽根車からの吐出流れを回収するた
めに、ボリュートが形成されている。送風機吐出口は、
羽根車後方軸方向に曲げると損失が生じるので、径方向
に吐き出す形状となっている。送風機の低騒音化には、
筒状消音器を送風機吸込口、吐出口に取り付けて行われ
るので、送風機の外形が大きくなる傾向にある。更に、
消音器内の摩擦損失は流速の自乗に比例して増加し、管
路の湾曲による損失も流速の自乗に比例して大きくなる
ので、消音器流路内の流速は低く押さえ、曲がり形状の
少ない流路を構成するほど良いが、筒状消音器の場合は
消音器の外形が大きくなる。このように、送風機と消音
器が独立した構成では、性能の低下を少なく、送風機全
体のコンパクト化を図ることは難しい。In the above-mentioned conventional example, a volute is formed around the impeller to collect the discharge flow from the impeller. The blower outlet is
Bending in the rearward axial direction of the impeller causes loss, so the shape is such that it is discharged in the radial direction. To reduce the noise of the blower,
Since the cylindrical silencer is attached to the suction port and the discharge port of the blower, the outer shape of the blower tends to be large. Furthermore,
The friction loss in the muffler increases in proportion to the square of the flow velocity, and the loss due to the curve of the pipe line also increases in proportion to the square of the flow velocity, so the flow velocity in the muffler flow path is kept low and the bend shape is small. It is better to configure the flow path, but in the case of a cylindrical silencer, the outer shape of the silencer becomes large. As described above, with the configuration in which the blower and the muffler are independent, it is difficult to reduce the performance and reduce the size of the blower as a whole.
【０００５】さらに、反負荷側軸端に取り付けられた外
扇１８による冷却では、反負荷側から開放空間において
行われ、ハウジング１１外周に冷却風Ａ1が吹き付けら
れているが、負荷側ブラケット１７側では冷却風Ａ1が
剥離を起こし、適切な冷却がなされておらず、負荷側軸
受１７ｂの冷却が十分にされないことにより軸受寿命の
劣化を招いている。本発明は以上のような課題を解決す
るためになされたもので、性能の低下が少なく、コンパ
クトな構造で、低騒音化、電動機冷却の実現を図ってい
る、外枠構造と整流板を有する電動遠心送風機を提供す
ることにある。Further, the cooling by the external fan 18 attached to the shaft end on the anti-load side is performed in the open space from the anti-load side, and the cooling air A 1 is blown to the outer circumference of the housing 11, but the bracket 17 on the load side is used. On the side, the cooling air A 1 peels off and is not properly cooled, and the load side bearing 17b is not sufficiently cooled, resulting in deterioration of the bearing life. The present invention has been made in order to solve the above problems, and has an outer frame structure and a rectifying plate that achieves low noise reduction and electric motor cooling with a compact structure with little deterioration in performance. To provide an electric centrifugal blower.
【０００６】[0006]
【課題を解決するための手段】本発明では上記目的を達
成するために、以下のような技術的手段を採用した。 （１）送風機の周囲に羽根車ケーシング外径より大きい
外枠を設けた送風機において、軸方向電動機側に羽根車
からの吐出流れを案内する案内羽根を持つブラケットを
羽根車外周に設け、外枠と電動機外周の間に吐出流路を
構成し、吐出流路内に上記ブラケットの案内羽根の出口
角と一致するかあるいはそれより大きい入口角を持つ整
流板を配置する。 （２）上記（１）の構成の送風機において、送風機を包
み込む外枠の内側に吸音材を配置する。 （３）上記（１）の構成の送風機において、吐出流路内
の整流板の一部あるいは全部が電動機冷却用のフィンと
なっている。 （４）上記（１）の構成の送風機において、吐出流路内
の整流板の一部あるいは全部が電動機を支持するための
支持板となっている。 （５）上記（１）の構成の送風機において、（３）、
（４）、（５）のうち少なくとも二つを兼ね備えてい
る。 （６）上記（２）の構成の送風機において、（３）、
（４）、（５）のうち少なくとも一つを兼ね備えてい
る。In order to achieve the above object, the present invention employs the following technical means. (1) In a blower in which an outer frame larger than the outer diameter of the impeller casing is provided around the blower, a bracket having guide vanes for guiding the discharge flow from the impeller is provided on the outer circumference of the impeller on the axial motor side. A discharge passage is formed between the motor and the outer periphery of the electric motor, and a rectifying plate having an inlet angle that is equal to or larger than the outlet angle of the guide vanes of the bracket is arranged in the discharge passage. (2) In the blower having the above configuration (1), the sound absorbing material is arranged inside the outer frame enclosing the blower. (3) In the blower configured as described above in (1), a part or all of the straightening vanes in the discharge flow passage are fins for cooling the electric motor. (4) In the blower configured as described above in (1), a part or all of the rectifying plate in the discharge passage serves as a support plate for supporting the electric motor. (5) In the blower having the configuration of (1) above, (3),
It has at least two of (4) and (5). (6) In the blower having the configuration of (2) above, (3),
It has at least one of (4) and (5).
【０００７】[0007]
【作用】送風機の流れを転向させるとき、流速が早い状
況で急激な転向を行うと、性能は低下する。送風機全体
を羽根車ケーシング外径より大きい外枠で包み込むこと
により電動機外周に吐出流路を設け、羽根車から径方向
に吐き出された流れを、羽根車の外周に設けた負荷側ブ
ラケットに案内羽根とハウジング外周に設けた整流板に
より、滑らかな形状で軸方向電動機側に転向させ、性能
の低下を小さくしている。これにより、電動機外周に、
全体外径を比較的大きくせずに、容易に減速流路を構成
できる。この際、流れの案内用に設けた案内羽根出口角
と、電動機外周に配置された整流板の入口角を一致させ
るかあるいは大きくさせることにより、案内羽根と整流
板を滑らかに連絡させ、損失を少なく流れを転向させて
いる。When the flow of the blower is diverted, the performance is deteriorated when the flow velocity is fast and the flow is rapidly diverted. By enclosing the entire blower with an outer frame that is larger than the outer diameter of the impeller casing, a discharge flow path is provided on the outer circumference of the electric motor, and the flow discharged in the radial direction from the impeller is guided to the load side bracket provided on the outer circumference of the impeller. With the straightening plate provided on the outer periphery of the housing, the smooth shape is used to turn the motor toward the axial motor side, thus reducing performance deterioration. As a result, on the outer periphery of the motor,
The deceleration flow path can be easily configured without making the overall outer diameter relatively large. At this time, the guide vane outlet angle provided for guiding the flow and the inlet angle of the straightening vanes arranged on the outer periphery of the motor are made equal to or larger than each other, so that the guide vanes and the straightening vanes are smoothly connected to each other, and the loss is reduced. There is little diversion.
【０００８】電動遠心送風機を羽根車ケーシング外径よ
り大きい外枠で包み込むことにより、遠心送風機からの
発生音を、羽根車ケーシングと外枠との間の空間によ
り、近接遮音することになり、音響パワーが減少する。
更に、外枠の内側に吸音材を配置することにより、損失
低下を少なく、消音特性を高められる。以上のように、
外枠と電動機外周に形成される吐出流路内に消音器を形
成しているので、送風機の外形が比較的大きくならず
に、損失の少ない消音器を形成できる。By enclosing the electric centrifugal blower in an outer frame larger than the outer diameter of the impeller casing, the sound generated from the centrifugal blower is closely insulated by the space between the impeller casing and the outer frame. Power is reduced.
Further, by disposing the sound absorbing material inside the outer frame, loss reduction can be reduced and the sound deadening characteristics can be improved. As mentioned above,
Since the muffler is formed in the discharge flow path formed on the outer frame and the outer periphery of the electric motor, the muffler with less loss can be formed without making the outer shape of the blower relatively large.
【０００９】閉空間での吐出流れによる電動機の冷却を
行うので、外扇分の損失が減少し、音響レベルも低下す
る。また、電動機側に吐出流れを案内する案内羽根を負
荷側ブラケットに設けることにより、案内羽根がブラケ
ットの冷却フィンの役割を果たし冷却性能が向上し、負
荷側軸受の冷却性能も向上し、軸受寿命が向上する。こ
れにより、高速回転時にも、軸の小型化が図られる。以
上の作用により、性能の低下が少なく、コンパクトな構
造で、低騒音化、電動機冷却の実現を図ることができ
る。Since the electric motor is cooled by the discharge flow in the closed space, the loss of the external fan is reduced and the sound level is also lowered. Also, by providing the load side bracket with guide vanes that guide the discharge flow to the electric motor side, the guide vanes play the role of cooling fins for the bracket, improving the cooling performance, improving the cooling performance of the load side bearing, and bearing life. Is improved. As a result, the shaft can be downsized even during high-speed rotation. With the above operation, it is possible to realize noise reduction and electric motor cooling with a compact structure in which there is little deterioration in performance.
【００１０】[0010]
【実施例】図１は本発明の電動遠心送風機の概要を示す
説明図である。全体を符号１００で示す電動遠心送風機
は、モータ１０と、モータ１０のハウジング１１の外周
部に設けられる筒状の外枠１１０を有する。外枠１１０
は、その内側に配設される第１のブラケット１１２と第
２のブラケット１１４によってモータ１０の駆動軸１６
をベアリング１６ａ，１６ｂを介して支持する。第１の
ブラケット１１２の負荷側のベアリング１６ａを支持す
るのが、この第１のブラケット１１２のモータ１０とは
反対側に、羽根車ケーシング１２０がとりつけられる。
羽根車ケーシング１２０の先端は円筒部１２２に形成さ
れ、吸込口１２２ａが開口する。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing the outline of the electric centrifugal blower of the present invention. The electric centrifugal blower, which is entirely denoted by reference numeral 100, has a motor 10 and a cylindrical outer frame 110 provided on an outer peripheral portion of a housing 11 of the motor 10. Outer frame 110
Is driven by the first bracket 112 and the second bracket 114 arranged inside the drive shaft 16 of the motor 10.
Are supported via bearings 16a and 16b. An impeller casing 120 is mounted on the side of the first bracket 112 opposite to the motor 10 that supports the load side bearing 16a of the first bracket 112.
The tip of the impeller casing 120 is formed in the cylindrical portion 122, and the suction port 122a is opened.
【００１１】モータ５の駆動軸１６の先端にナット１７
によりとりつけられた羽根車１３０は、ケーシング１２
０内にあって、その内径部から流体Ａを吸込み、遠心力
により流体を加速して外径方向へ吐出する。加圧された
流体Ａは、ケーシング１２０内に設けられる案内板１４
０で内径方向へ案内され、さらに、ケーシング１２４内
の案内板１４２を経て外径方向の吐出口１４４に案内さ
れる。吐出口１４４から吐出された流体Ａは、第１のブ
ラケット１１２を貫通する吐出流路１５０を通って、外
枠１１０とモータ１０のケーシング１１の間に形成され
る流路１６０に流れる。流路１６０を軸方向に流れる流
体Ａは、第２のブラケット１１４の開口部１１４ａを通
って、外枠１１０を絞って形成される吐出流路１７０へ
案内され、吐出口１１９から機外へ吐出される。A nut 17 is attached to the tip of the drive shaft 16 of the motor 5.
The impeller 130 attached by
Within 0, the fluid A is sucked from the inner diameter portion thereof, and the fluid is accelerated by the centrifugal force and discharged in the outer diameter direction. The pressurized fluid A is applied to the guide plate 14 provided in the casing 120.
At 0, it is guided in the inner diameter direction, and is further guided to the outer diameter direction discharge port 144 via the guide plate 142 in the casing 124. The fluid A discharged from the discharge port 144 flows through the discharge flow path 150 penetrating the first bracket 112 to the flow path 160 formed between the outer frame 110 and the casing 11 of the motor 10. The fluid A flowing in the flow path 160 in the axial direction passes through the opening 114a of the second bracket 114, is guided to the discharge flow path 170 formed by narrowing the outer frame 110, and is discharged from the discharge port 119 to the outside of the machine. To be done.
【００１２】本発明は以上のように、遠心羽根車から送
り出された加圧流体を軸線方向に案内して流す送風機に
あって、羽根車の吐出口に案内羽根を設けるとともに、
案内羽根を出た流体をモータのハウジングと外枠との間
の流路内で案内する整流板を設けて、整流された軸流を
得る構成を提供するものである。As described above, the present invention provides a blower in which a pressurized fluid sent from a centrifugal impeller is guided in an axial direction to flow, and a guide vane is provided at a discharge port of the impeller,
The present invention provides a structure for providing a rectified axial flow by providing a rectifying plate that guides the fluid that has exited the guide vanes in the flow path between the motor housing and the outer frame.
【００１３】図２は、負荷側となる第１のブラケット１
１２の外周部の吐出流路１５０内に設けられる案内羽根
１８０と、モーターのハウジング１１の外周部の流路１
６０内に設けられる整流板１９０の概要を示す斜視図で
ある。図３は案内羽根１８０の入口角α1と出口角α2を
示すもので、送風機の羽根車の回動軸に直交する面Ｖに
対する案内羽根１８０の入口角α1に対して、出口角α2
は大きく、その間は曲面で結ばれる。FIG. 2 shows a first bracket 1 on the load side.
The guide vanes 180 provided in the discharge flow passage 150 at the outer peripheral portion of the motor 12 and the flow passage 1 at the outer peripheral portion of the motor housing 11.
FIG. 6 is a perspective view showing an outline of a current plate 190 provided in a 60. FIG. 3 shows the inlet angle α 1 and the outlet angle α 2 of the guide blade 180. The inlet angle α 1 and the outlet angle α of the guide blade 180 with respect to the plane V orthogonal to the rotation axis of the impeller of the blower. 2
Are large, and the surfaces are connected by curved surfaces.
【００１４】モーターハウジング１１に植設する整流板
１９０は、入口角Ｂ1を有し、この入口角Ｂ1は案内羽根
１８０の出口角α2に一致するか、またはそれより大き
く設定される。[0014] rectifying plate 190 embedded in the motor housing 11 has an inlet angle B 1, the inlet angle B 1 represents either matches the outlet angle alpha 2 of the guide vanes 180, or is greater than set.
【００１５】整流板１９０は簡素な薄板で形成され、後
方では面Ｖに対する角度Ｂ2は９０度となっている。ま
た、第１のブラケット１１２に設ける案内羽根１８０と
モーターハウジング１１に設ける整流板１９０との間隙
寸法はδ1として管理される。以上の構成により、羽根
車から吐出された流体Ａは、損失を最少限に押えつつ、
軸方向に転向される。また、案内羽根１８０の枚数と整
流板１９０の枚数を互いに素の関係とすることによって
干渉騒音の発生を防止する。The current plate 190 is formed of a simple thin plate, and the angle B 2 with respect to the surface V is 90 degrees at the rear. Further, the size of the gap between the guide blade 180 provided on the first bracket 112 and the current plate 190 provided on the motor housing 11 is managed as δ 1 . With the above configuration, the fluid A discharged from the impeller suppresses the loss to a minimum,
It is turned axially. Further, by making the number of guide vanes 180 and the number of rectifying plates 190 relatively prime to each other, generation of interference noise is prevented.
【００１６】図４〜図６は、隙間間隔δ1の違いにより
案内羽根１８０と整流板１９０の配置を変えた場合の実
施例について述べる。図４は、隙間間隔δ1が０以外の
場合で、この場合は整流板１９０と案内羽根１８０の間
を空けた配置で、図３の実施例と同様の構成となってい
る。整流板１９０の枚数は案内羽根１８０の枚数と互い
に素の関係とし、整流板１９０の入口角Ｂ1の大きさは
案内羽根１８０の出口角α2とを一致させるか、それよ
りも大きくさせている。これにより、案内羽根１８０と
整流板１９０を滑らかに連絡させ、ハウジング１１と整
流板１９０を一体構造として比較的簡単に形成できる構
造となっている。性能面では、流路内に円周方向に隙間
ができることにより、そこでの急激な膨張が発生する
と、損失が発生する。4 to 6 show an embodiment in which the arrangement of the guide vanes 180 and the straightening vanes 190 is changed due to the difference in the gap distance δ 1 . FIG. 4 shows a case where the gap distance δ 1 is other than 0, and in this case, the rectifying plate 190 and the guide blade 180 are arranged with a gap, and the configuration is the same as that of the embodiment of FIG. The number of straightening vanes 190 is in a prime relationship with the number of guide vanes 180, and the size of the entrance angle B 1 of the straightening vanes 190 should be equal to or larger than the exit angle α 2 of the guide vanes 180. There is. Thereby, the guide vanes 180 and the rectifying plate 190 are smoothly connected to each other, and the housing 11 and the rectifying plate 190 can be formed as an integrated structure relatively easily. In terms of performance, a gap is formed in the flow passage in the circumferential direction, so that a sudden expansion at the gap causes a loss.
【００１７】図５は、隙間間隔δ1が０の場合を示し、
他の実施例を構成する。案内羽根１８０の枚数と整流板
１９０の枚数を一致させ、かつ案内羽根出口角と整流板
入口角を一致させ、案内羽根１８０の吐出流路１５０と
整流板１９０間の流路１６０を滑らかに接続させ、一枚
羽根のようにし、流れを軸方向に転向させている。FIG. 5 shows the case where the gap interval δ 1 is 0,
Another embodiment is constructed. The number of the guide vanes 180 and the number of the rectifying plates 190 are made to coincide, and the guide vane outlet angle and the rectifying plate inlet angle are made to coincide with each other, so that the discharge passage 150 of the guide vanes 180 and the passage 160 between the rectifying plates 190 are smoothly connected. Then, like a single blade, the flow is diverted in the axial direction.
【００１８】図６は、隙間間隔δ1が０以外の場合で、
この場合は案内羽根１８０間流路１５０内に整流板１９
０の先端部１９０ａが入り込んだ構成で、第３の実施例
を構成する。整流板１９０の枚数は案内羽根１８０の枚
数と互いに素の関係とし、整流板入口角Ｂ1の大きさ
は、整流板１９０軸方向位置での案内羽根１８０の羽根
角度と一致させている。図６に示した構成では、案内羽
根１８０間の流路内に整流板１９０を入り込ませるの
で、羽根同士が当らないような組み立てる必要がある。
性能面では、案内羽根１８０間の流路内に整流板１９０
を入り込ませるので、剥離が発生しやすい流れの曲がり
部分で、流れの案内を増やすこととなり、剥離を防止で
きる。FIG. 6 shows the case where the gap interval δ 1 is other than 0,
In this case, the flow regulating plate 19 is provided in the flow path 150 between the guide vanes 180.
The third embodiment has a configuration in which the leading end 190a of 0 is inserted. The number of the rectifying plates 190 is relatively prime to the number of the guide vanes 180, and the size of the rectifying plate inlet angle B 1 matches the vane angle of the guide vanes 180 at the axial position of the rectifying plate 190. In the configuration shown in FIG. 6, since the flow straightening plate 190 is inserted into the flow path between the guide vanes 180, it is necessary to assemble the vanes so that they do not touch each other.
In terms of performance, the flow regulating plate 190 is provided in the flow path between the guide vanes 180.
Since it is made to enter, the flow guide is increased at the bent portion of the flow where separation is likely to occur, and separation can be prevented.
【００１９】図７は他の実施例を示す。負荷側ブラケッ
ト１２２の案内羽根１８０の断面形状を模式的に示す羽
根断面図となっている。案内羽根１８０の断面形状を翼
型としており、断面形状を翼型にすることにより、断面
形状が薄板の場合に比べて、流れの剥離が起きにくく、
損失が小さい。流れの剥離が起きると、実質的な流路が
狭まり、損失が増大する。整流板１９０の入口付近を断
面形状を翼型にすることも可能である。FIG. 7 shows another embodiment. It is a blade sectional view schematically showing a sectional shape of a guide blade 180 of the load side bracket 122. The guide vane 180 has a wing shape in cross section, and by making the cross section shape like a wing shape, separation of the flow is less likely to occur as compared with the case where the cross section shape is a thin plate,
The loss is small. When the flow separation occurs, the flow path is substantially narrowed and the loss is increased. It is also possible that the vicinity of the inlet of the current plate 190 has a wing shape in cross section.
【００２０】図８は本発明の他の実施例を示し、本電動
遠心送風機にあっては、吸音材を用いることによって、
より消音特性を高めた送風機を提供するものである。全
体を符号２００で示す電動遠心送風機は、外枠２１０内
に、第１のブラケット２１２と第２のブラケット２１４
を介してモータ１０を支持する。モータハウジング１１
は、ボルト２５２によってブラケット２１２，２４は、
ボルト２５０によって外枠２１０，２２２，２１８と結
合される。モータ１０と羽根車１３０、吐出側の案内羽
根１４２等の構成は、先に説明した構成と同様であっ
て、説明を省略する。吸込側の外枠２２２は、径寸法が
絞られて吸込口２２２ａを形成する。本実施例にあって
は、外枠２２２の内側の要所に吸音材２９０を充填して
ある。吸音材２９０は、例えば、グラスウール等の材料
を用いる。同様に、中央の外枠２１０や吐出側の外枠２
１８の内側にも吸音材２９０を充填し、消音効果を向上
させる。FIG. 8 shows another embodiment of the present invention. In this electric centrifugal blower, by using a sound absorbing material,
It is intended to provide a blower with improved sound deadening characteristics. An electric centrifugal blower generally indicated by reference numeral 200 has a first bracket 212 and a second bracket 214 in an outer frame 210.
The motor 10 is supported via. Motor housing 11
The brackets 212 and 24 are attached by bolts 252.
It is connected to the outer frames 210, 222, 218 by bolts 250. The configurations of the motor 10, the impeller 130, the discharge-side guide vanes 142, and the like are the same as the configurations described above, and thus the description thereof will be omitted. The outer frame 222 on the suction side has a reduced diameter dimension to form a suction port 222a. In this embodiment, the sound absorbing material 290 is filled inside the outer frame 222. As the sound absorbing material 290, for example, a material such as glass wool is used. Similarly, the central outer frame 210 and the discharge-side outer frame 2
The inside of 18 is also filled with the sound absorbing material 290 to improve the sound deadening effect.
【００２１】図９は本発明の他の実施例を示す説明図で
ある。本実施例では、吸込口と吐出口を羽根車１３０に
対して径方向に配設したものである。全体を符号３００
で示す電動遠心送風機は、外枠３１０内に第１のブラケ
ット３１２と第２のブラケット３１４を介してモータ１
０を支持する。モータ１０に対する羽根車１３０の構成
等は先の実施例と同様であるので、説明を省略する。モ
ータ１１０を囲む中央の外枠３１０に対して吸込側の外
枠３２２は、径方向の開口部３２２ａを有し、吸込口を
形成する。吸込側の流路３２４には整流板３３０を配設
して、吸込流体Ａを整流する。羽根車１３０で加圧さ
れ、吐出流路１５０，１６０を通った軸流流体Ａは、吐
出側の外枠３１８内に設けられた流路３７０へ送られ
る。流路３７０内には案内羽根３６０が設けてあり、流
体Ａを軸流から径方向の流れに転向させて吐出口３１９
から吐出する。本装置にあっても、中央の外枠３１０、
吸込側の外枠３２２、吐出側の外枠３１８の内部の要所
には、吸音材３９０を充填して消音効果を向上する。FIG. 9 is an explanatory view showing another embodiment of the present invention. In this embodiment, the suction port and the discharge port are arranged in the radial direction with respect to the impeller 130. 300 as a whole
The electric centrifugal blower shown in FIG. 1 has the motor 1 through the first bracket 312 and the second bracket 314 in the outer frame 310.
Support 0. The configuration of the impeller 130 with respect to the motor 10 is the same as that of the previous embodiment, so the description thereof will be omitted. The outer frame 322 on the suction side with respect to the central outer frame 310 surrounding the motor 110 has a radial opening 322a and forms a suction port. A flow straightening plate 330 is provided in the flow path 324 on the suction side to straighten the suction fluid A. The axial fluid A, which is pressurized by the impeller 130 and has passed through the discharge flow paths 150 and 160, is sent to the flow path 370 provided in the outer frame 318 on the discharge side. A guide vane 360 is provided in the flow path 370, and the fluid A is diverted from the axial flow to the radial flow to discharge the discharge port 319.
Discharge from. Even in this device, the central outer frame 310,
The sound absorbing material 390 is filled in the inside of the outer frame 322 on the suction side and the outer frame 318 on the discharge side to improve the sound deadening effect.
【００２２】図１０は整流板１９０の具体的な取付構造
を示し、モータハウジング１１の外側に設けられた整流
板１９０を外枠１１０に対してビス１９５により固定す
る構造とすることができる。FIG. 10 shows a specific mounting structure of the rectifying plate 190, and the rectifying plate 190 provided outside the motor housing 11 can be fixed to the outer frame 110 with screws 195.
【００２３】[0023]
【発明の効果】本発明は以上のように、羽根車の回転に
よる遠心力によって流体を加圧する送風機にあって、吐
出流体をモータハウジングの外側に形成する流路を軸方
向に通過させることによって、モータや羽根車から発生
する騒音を低減させるものである。さらに吸音材を装備
することにより消音効果を向上させることができる。ま
た、この軸流をモータハウジングに植設した整流板の間
を通過させることによって、モータハウジングを良好に
冷却し、モータ内部に発生する熱を効果的に発散させる
ことができる。そして、流体を羽根車から径方向に案内
する型式の送風機に比べて、コンパクトに構成すること
ができる。INDUSTRIAL APPLICABILITY As described above, the present invention provides a blower for pressurizing a fluid by centrifugal force due to the rotation of an impeller, in which a discharge fluid is axially passed through a flow passage formed outside a motor housing. The noise generated from the motor and the impeller is reduced. Furthermore, the sound deadening effect can be improved by installing a sound absorbing material. Further, by passing this axial flow between the flow straightening plates planted in the motor housing, the motor housing can be cooled well, and the heat generated inside the motor can be effectively dissipated. Further, it can be made compact as compared with a blower of the type that guides fluid from the impeller in the radial direction.
【図１】本発明の実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】案内羽根と整流板の配置を示す斜視図。FIG. 2 is a perspective view showing an arrangement of guide vanes and a current plate.
【図３】案内羽根と支流板の角度を示す説明図。FIG. 3 is an explanatory view showing an angle between a guide blade and a tributary plate.
【図４】案内羽根と整流板の組合せの実施例を示す説明
図。FIG. 4 is an explanatory view showing an embodiment of a combination of guide vanes and a current plate.
【図５】案内羽根と整流板の組合せの実施例を示す説明
図。FIG. 5 is an explanatory view showing an embodiment of a combination of guide vanes and a current plate.
【図６】案内羽根と整流板の組合せの実施例を示す説明
図。FIG. 6 is an explanatory view showing an embodiment of a combination of guide vanes and a current plate.
【図７】案内羽根と整流板の組合せの実施例を示す説明
図。FIG. 7 is an explanatory view showing an embodiment of a combination of guide vanes and a current plate.
【図８】本発明の他の実施例を示す断面図。FIG. 8 is a sectional view showing another embodiment of the present invention.
【図９】本発明の更に他の実施例を示す断面図。FIG. 9 is a sectional view showing still another embodiment of the present invention.
【図１０】整流板の取付構造を示す説明図。FIG. 10 is an explanatory view showing a mounting structure of a current plate.
【図１１】従来の遠心電動送風機の斜視図。FIG. 11 is a perspective view of a conventional centrifugal electric blower.
【図１２】重李の遠心電動送風機の断面図。FIG. 12 is a cross-sectional view of Ji-Li's centrifugal electric blower.
１０ モータ １１ モータハウジング １６ 駆動軸 １００ 電動遠心送風機 １１０ 外枠 １１２ 第１のブラケット １１４ 第２のブラケット １２０ 羽根車ケーシング １３０ 羽根車 １４２ 案内羽根 １５０，１６０，１７０ 吐出流路 １８０ 案内羽根 １９０ 整流板 ２９０，３９０ 吸音材 10 Motor 11 Motor Housing 16 Drive Shaft 100 Electric Centrifugal Blower 110 Outer Frame 112 First Bracket 114 Second Bracket 120 Impeller Casing 130 Impeller 142 Guide Blade 150, 160, 170 Discharge Channel 180 Guide Blade 190 Straightening Plate 290 , 390 sound absorbing material
フロントページの続き (72)発明者 長谷川 健吾 千葉県習志野市東習志野７丁目１番１号 日立京葉エンジニアリング株式会社内 (72)発明者 朝吹 弘 東京都千代田区神田駿河台四丁目６番地 株式会社日立製作所産業機器事業部内 (72)発明者 藤生 正行 東京都千代田区神田駿河台四丁目６番地 株式会社日立製作所産業機器事業部内Front Page Continuation (72) Inventor Kengo Hasegawa 7-1-1 Higashi Narashino, Narashino, Chiba Prefecture Hitachi Keiyo Engineering Co., Ltd. Machinery Division (72) Inventor Masayuki Fujio 4-Chome, Surugadai, Kanda, Chiyoda-ku, Tokyo Hitachi Industrial Machinery Division
Claims (5)
ング外径より大きな外径寸法を有する外枠と、羽根車外
周に設けられた軸方向に羽根車からの吐出流れを案内す
る案内羽根を有するブラケットと、該外枠と電動機外周
によって形成される吐出流路と、該吐出流路内に配設さ
れる上記ブラケットの案内羽根の出口角と一致するかあ
るいはそれより大きい入口角を持つ整流板とを備えてな
る電動遠心送風機。1. An outer frame having an outer diameter dimension larger than an outer diameter of an impeller casing arranged around a blower, and guide vanes provided on an outer circumference of the impeller for guiding a discharge flow from the impeller in an axial direction. A bracket having a discharge passage formed by the outer frame and the outer periphery of the electric motor, and an inlet angle that is equal to or larger than the outlet angle of the guide vanes of the bracket arranged in the discharge passage. An electric centrifugal blower including a current plate.
電動機の冷却用のフィンである請求項１記載の電動遠心
送風機。2. The rectifying plate disposed in the discharge flow passage,
The electric centrifugal blower according to claim 1, which is a fin for cooling the electric motor.
外枠の内側に外周部が固着され、内周部が電動機の支持
部材である請求項１又は２記載の電動遠心送風機。3. The rectifying plate disposed in the discharge flow passage,
The electric centrifugal blower according to claim 1 or 2, wherein the outer peripheral portion is fixed to the inner side of the outer frame, and the inner peripheral portion is a supporting member of the electric motor.
る吐出流路は、外枠の内側に吸音材を備えてなる請求項
１記載の電動遠心送風機。4. The electric centrifugal blower according to claim 1, wherein a discharge flow path formed by the outer frame and the outer periphery of the electric motor comprises a sound absorbing material inside the outer frame.
ブラケットは、外枠と一体に固着されるとともに、吸音
材の支持部材を構成する請求項１又は４記載の電動遠心
送風機。5. The electric centrifugal blower according to claim 1, wherein the bracket supporting the front end portion and the rear end portion of the electric motor is integrally fixed to the outer frame and constitutes a support member for the sound absorbing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22796694A JP3474279B2 (en) | 1994-09-22 | 1994-09-22 | Electric centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22796694A JP3474279B2 (en) | 1994-09-22 | 1994-09-22 | Electric centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0893683A true JPH0893683A (en) | 1996-04-09 |
| JP3474279B2 JP3474279B2 (en) | 2003-12-08 |
Family
ID=16869054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22796694A Expired - Fee Related JP3474279B2 (en) | 1994-09-22 | 1994-09-22 | Electric centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3474279B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11125198A (en) * | 1997-10-22 | 1999-05-11 | Matsushita Electric Ind Co Ltd | Electric blower |
| JP2009537735A (en) * | 2006-05-24 | 2009-10-29 | レスメド・リミテッド | Compact and low noise efficient blower for CPAP equipment |
| US8016572B2 (en) | 2001-03-30 | 2011-09-13 | Chaffee Robert B | Pump with axial conduit |
| US9279510B2 (en) | 2000-05-17 | 2016-03-08 | Robert B. Chaffee | Valve with electromechanical device for actuating the valve |
| JP2017008875A (en) * | 2015-06-25 | 2017-01-12 | パナソニックＩｐマネジメント株式会社 | Air blower |
| US9737153B2 (en) | 2001-07-10 | 2017-08-22 | Robert B. Chaffee | Configurable inflatable support devices |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007026425A1 (en) * | 2005-08-31 | 2007-03-08 | Fujitsu Limited | High static pressure axial flow fan |
-
1994
- 1994-09-22 JP JP22796694A patent/JP3474279B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11125198A (en) * | 1997-10-22 | 1999-05-11 | Matsushita Electric Ind Co Ltd | Electric blower |
| US9279430B2 (en) | 2000-05-17 | 2016-03-08 | Robert B. Chaffee | Pump with axial conduit |
| US9279510B2 (en) | 2000-05-17 | 2016-03-08 | Robert B. Chaffee | Valve with electromechanical device for actuating the valve |
| US8016572B2 (en) | 2001-03-30 | 2011-09-13 | Chaffee Robert B | Pump with axial conduit |
| US9737153B2 (en) | 2001-07-10 | 2017-08-22 | Robert B. Chaffee | Configurable inflatable support devices |
| EP2325493A3 (en) * | 2006-05-24 | 2014-08-27 | ResMed Motor Technologies Inc. | Compact low noise efficient blower for CPAP devices |
| US8734097B2 (en) | 2006-05-24 | 2014-05-27 | Resmed Motor Technologies Inc | Compact low noise efficient blower for CPAP devices |
| US9677563B2 (en) | 2006-05-24 | 2017-06-13 | Resmed Motor Technologies Inc. | Compact low noise efficient blower for CPAP devices |
| JP2009537735A (en) * | 2006-05-24 | 2009-10-29 | レスメド・リミテッド | Compact and low noise efficient blower for CPAP equipment |
| US10605246B2 (en) | 2006-05-24 | 2020-03-31 | Resmed Motor Technologies Inc. | Compact low noise efficient blower for CPAP devices |
| EP3667093A1 (en) * | 2006-05-24 | 2020-06-17 | ResMed Motor Technologies Inc | Compact low noise efficient blower for cpap devices |
| US11353030B2 (en) | 2006-05-24 | 2022-06-07 | Resmed Motor Technologies Inc. | Compact low noise efficient blower for CPAP devices |
| US11892000B2 (en) | 2006-05-24 | 2024-02-06 | Resmed Motor Technologies Inc. | Compact low noise efficient blower for CPAP devices |
| JP2017008875A (en) * | 2015-06-25 | 2017-01-12 | パナソニックＩｐマネジメント株式会社 | Air blower |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3474279B2 (en) | 2003-12-08 |
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