JPH07208390A - Motor fan - Google Patents
Motor fanInfo
- Publication number
- JPH07208390A JPH07208390A JP149994A JP149994A JPH07208390A JP H07208390 A JPH07208390 A JP H07208390A JP 149994 A JP149994 A JP 149994A JP 149994 A JP149994 A JP 149994A JP H07208390 A JPH07208390 A JP H07208390A
- Authority
- JP
- Japan
- Prior art keywords
- seal member
- impeller
- fan casing
- suction port
- electric blower
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は電気掃除機等に用いる電
動送風機に係り、特に、送風機効率の向上に有効な電動
送風機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blower used for an electric vacuum cleaner or the like, and more particularly to an electric blower effective for improving the efficiency of the blower.
【０００２】[0002]
【従来の技術】電動送風機は、遠心羽根車の外周出口か
ら吐出した気流の一部が遠心羽根車の前面シュラウドと
ファンケーシングの間を通って吸込口に流れ込む循環流
が生ずるため、送風機効率が低下するといった欠点があ
った。2. Description of the Related Art In an electric blower, a part of the air flow discharged from the outer peripheral outlet of the centrifugal impeller passes through a space between the front shroud of the centrifugal impeller and the fan casing to generate a circulating flow, so that the efficiency of the blower is improved. There was a drawback that it decreased.
【０００３】従来、この循環流を防止するために、特開
平3−233194 号公報記載のように、筒状に形成された良
摺動性の還流遮断部材をファンケーシングの吸込口に設
け、遠心羽根車の前面シュラウドと略接触状態にし、還
流遮断部材の作用により循環流を堰き止めて送風効率を
向上するような技術が提案されている。そして、この還
流遮断部材は、組立時には遠心羽根車の前面シュラウド
に圧設状態となるようにファンケーシングに取り付けら
れ、組立後の最初の運転によって遠心羽根車の前面シュ
ラウドに削り取られて略接触状態となるように構成され
ていた。Conventionally, in order to prevent this circulating flow, as described in Japanese Patent Laid-Open No. 233194/1993, a cylindrical and well slidable reflux shut-off member is provided at the suction port of the fan casing to centrifuge it. A technique has been proposed in which the front shroud of the impeller is brought into a substantially contact state and the circulation blocking member is used to block the circulation flow to improve the blowing efficiency. Then, this circulation blocking member is attached to the fan casing so that it is pressed onto the front shroud of the centrifugal impeller during assembly, and is scraped off by the front shroud of the centrifugal impeller by the first operation after assembly to be in a substantially contact state. Was configured to be.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
特開平3−233194 号公報記載の技術においては、ファン
ケーシングに固着されて遠心羽根車の前面シュラウドに
接触させられる筒状の還流遮断部材は、外部からの気流
を吸い込む案内部材として機能するものであることか
ら、保形性の高い部材であることが必要であり、高い組
立精度が得られる部品加工作業と部品組立作業が要求さ
れるといった問題があった。However, in the technique described in the above-mentioned Japanese Patent Laid-Open No. 3-233194, the cylindrical reflux blocking member fixed to the fan casing and brought into contact with the front shroud of the centrifugal impeller is Since it functions as a guide member that draws in airflow from the outside, it must be a member with high shape retention, and a problem that parts processing work and parts assembly work that can obtain high assembly precision are required. was there.
【０００５】すなわち、組立後の最初の運転において遠
心羽根車をロックさせないために還流遮断部材は弾性体
でなければならないが、案内部材として機能するための
保形性を得る剛性も必要である。従って、組立精度が低
いと、還流遮断部材が遠心羽根車に過度に押圧されて遠
心羽根車がロックされて運転不能になったり、運転中の
摩擦抵抗が増えたり、逆に前面シュラウドと接触せずに
循環流を防止できない恐れがある。That is, in order to prevent the centrifugal impeller from being locked in the first operation after the assembly, the reflux blocking member must be an elastic body, but it is also necessary to have rigidity to obtain shape retention so as to function as a guide member. Therefore, if the assembly accuracy is low, the centrifugal shut-off member will be excessively pressed by the centrifugal impeller, locking the centrifugal impeller and making it inoperable, increasing the frictional resistance during operation, and conversely contacting the front shroud. Otherwise, it may not be possible to prevent the circulation flow.
【０００６】電気掃除機等に用いられる高速回転の電動
送風機では、摩擦抵抗の増加は、循環流防止による効率
向上を摩擦損失による効率低下が上回って総合的に電動
送風機の効率が低下してしまう恐れがある。更に、摩擦
抵抗の増加は、摩擦熱による還流遮断部材の変形，破損
や羽根車との固渋あるいは摺動部の隙間が増大して循環
流の発生を招来する恐れもあり、実用化には多くの問題
点がある。In a high-speed rotating electric blower used for an electric vacuum cleaner or the like, an increase in friction resistance results in an overall decrease in efficiency of the electric blower due to an increase in efficiency due to friction loss exceeding an improvement in efficiency due to circulation flow prevention. There is a fear. Further, an increase in frictional resistance may cause deformation and damage of the circulation blocking member due to frictional heat, tightness with the impeller, or an increase in the gap between sliding parts, which may lead to the generation of a circulating flow. There are many problems.
【０００７】本発明の目的は、上記問題点を解決し、摩
擦損失の増加を抑制し、かつ循環流を確実に防止して送
風機効率を向上させる電動送風機を提供することにあ
る。An object of the present invention is to provide an electric blower which solves the above problems, suppresses an increase in friction loss, and surely prevents a circulating flow to improve blower efficiency.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に本発明の特徴とするところは、回転軸に取付け固定さ
れた羽根車と、該羽根車の流路後段側に配置された固定
案内羽根と、前記羽根車及び固定案内羽根を覆うファン
ケーシングとを備え、前記羽根車は、前記ファンケーシ
ングの吸込口に対向する前面シュラウドの吸込口から空
気を吸い込んで前記固定案内羽根に吐出する電動送風機
において、弾性体により形成した略環状のシール部材を
前記羽根車の前面シュラウドの吸込口端縁にシール部材
の厚みの０〜５０％の深さで摺接するように、ファンケ
ーシングの内面に設け、シール部材の外周側のみファン
ケーシングに固着させるようにしたことにある。In order to achieve the above object, the features of the present invention are that an impeller mounted and fixed to a rotating shaft and a fixed guide disposed on the downstream side of the flow path of the impeller. An impeller that covers the impeller and the fixed guide vane, and the impeller is an electric motor that sucks air from a suction port of the front shroud facing the suction port of the fan casing and discharges the air to the fixed guide vane. In the blower, a substantially annular seal member formed of an elastic body is provided on the inner surface of the fan casing so as to be in sliding contact with the suction port edge of the front shroud of the impeller at a depth of 0 to 50% of the thickness of the seal member. The reason is that only the outer peripheral side of the seal member is fixed to the fan casing.
【０００９】[0009]
【作用】本発明によれば、弾性体にて形成されたシール
部材を羽根車に押接するようにファンケーシングに設け
ているので、弾性変形によって羽根車との間に押圧が発
生して該羽根車をロックすることがなく、また押圧され
た部分は羽根車の初期の回転によって削り取られてしま
うので、その後の運転時の摺動による摩擦抵抗は少なく
なり、摩擦損失の増加が抑制され、循環流を確実に防止
して送風機効率を向上させることができる。According to the present invention, since the seal member formed of the elastic body is provided on the fan casing so as to be pressed against the impeller, the elastic deformation causes the pressing against the impeller to cause the impeller to move. The car is not locked, and the pressed part is scraped off by the initial rotation of the impeller, so the frictional resistance due to sliding during subsequent driving is reduced, the increase in friction loss is suppressed, and circulation is reduced. It is possible to reliably prevent the flow and improve the efficiency of the blower.
【００１０】また、組立ばらつきなどで羽根車の前面シ
ュラウドとシール部材の間に隙間が生じても、遠心羽根
車が回転した時に発生する負圧によりシール部材の内周
側が撓んで引き込まれ、前面シュラウド端面に接触・摺
動するので、循環流を防止することができる。Further, even if a gap occurs between the front shroud of the impeller and the seal member due to variations in assembly or the like, the negative pressure generated when the centrifugal impeller rotates causes the inner peripheral side of the seal member to bend and be drawn in. Circulating flow can be prevented because it contacts and slides on the end surface of the shroud.
【００１１】[0011]
【実施例】以下、本発明の実施例を添付の図面を参照し
て説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１２】図１に本発明に係る電動送風機の縦断側面
図を示す。FIG. 1 shows a vertical side view of an electric blower according to the present invention.
【００１３】同図において、電動送風機は１０は電動機
部２０及び送風機部３０から構成されている。本実施例
の電動機部２０は整流子形電動機であって、一端面側が
開口した有底筒状のハウジング２１とエンドブラケット
２２によって区画される空間内に、固定子２３及び回転
子２４が収納される。In FIG. 1, the electric blower 10 comprises an electric motor section 20 and a blower section 30. The electric motor section 20 of the present embodiment is a commutator type electric motor, and a stator 23 and a rotor 24 are housed in a space defined by a bottomed cylindrical housing 21 having one end face side open and an end bracket 22. It
【００１４】固定子２３は界磁巻線２３ａを施した固定
子鉄心２３ｂをハウジング２１に固定しており、また、
回転子２４は回転軸２４ａに嵌着した電機子巻線２４ｂ
を施した電機子鉄心２４ｃ及び前記電機子巻線２４ｂと
接続される整流子２４ｄを軸受２５，２６により回転自
在に支持して構成されている。The stator 23 has a stator core 23b provided with a field winding 23a fixed to the housing 21, and
The rotor 24 is an armature winding 24b fitted on a rotating shaft 24a.
The armature iron core 24c and the commutator 24d connected to the armature winding 24b are rotatably supported by bearings 25 and 26.
【００１５】ハウジング２１の外周壁部には、螺子止め
して固定されたブラシ保持器２７が取り付けられてい
る。ブラシ保持器２７にはカーボンブラシ２８が収納さ
れており、バネ等で付勢されて整流子２４ｄの外周面に
当設されて給電するようにしている。A brush holder 27 is fixed to the outer peripheral wall of the housing 21 by screwing. A carbon brush 28 is housed in the brush holder 27, and is urged by a spring or the like to abut on the outer peripheral surface of the commutator 24d to supply electric power.
【００１６】送風機部３０は、エンドブラケット２２上
に螺子止めされた固定案内羽根３１と、エンドブラケッ
ト２２及び固定案内羽根３１を貫通して伸びる回転軸２
４ａに螺子３２によって固定された遠心羽根車３３と、
エンドブラケット２２の外周に圧入固定された固定案内
羽根３１及び遠心羽根車３３を覆うように取り付けられ
たファンケーシング３４とを備えている。The blower unit 30 has a fixed guide vane 31 screwed onto the end bracket 22, and a rotary shaft 2 extending through the end bracket 22 and the fixed guide vane 31.
A centrifugal impeller 33 fixed to the 4a by a screw 32,
A fixed guide vane 31 press-fitted and fixed to the outer periphery of the end bracket 22 and a fan casing 34 attached so as to cover the centrifugal impeller 33 are provided.
【００１７】送風機部３０によって発生した気流は、エ
ンドブラケット２２に形成した風窓２２ａから電動機部
２０内に導かれ、電動機部２０内を冷却した後、ハウジ
ング２１の外周壁に形成した排気孔２１ａから機外に排
出するようにしている。The air flow generated by the blower unit 30 is guided into the electric motor unit 20 through a wind window 22a formed in the end bracket 22 to cool the electric motor unit 20 and then through an exhaust hole 21a formed in the outer peripheral wall of the housing 21. I try to discharge it out of the machine.
【００１８】図２に、図１における電動送風機の送風機
部のシール部の縦断面図を示す。FIG. 2 shows a vertical sectional view of a seal portion of the blower portion of the electric blower shown in FIG.
【００１９】図２に示すように、ファンケーシング３４
の吸込口３４ａを形成する吸込口端縁部３３ｃは内部に
湾曲したベルマウス部３４ｂ状を成し、遠心羽根車３３
の前面シュラウド３３ａの吸込口３３ｂを形成する吸込
口端縁部３３ｃは遠心翼33ｄの内端を超えて前記ベルマ
ウス部３４ｂの背面部に伸びている。As shown in FIG. 2, the fan casing 34
The suction port end edge portion 33c forming the suction port 34a has a bell mouth portion 34b shape curved inside, and the centrifugal impeller 33
The suction port end edge portion 33c forming the suction port 33b of the front shroud 33a extends beyond the inner end of the centrifugal blade 33d to the back surface portion of the bell mouth portion 34b.
【００２０】ファンケーシング３４の内面には凸部３４
ｃが設けられており、該凸部３４ｃに嵌合させて前記ベ
ルマウス部３４ｂの背面部に接着固定したシール部材３
５が前記遠心羽根車３３の前面シュラウド３３ａの吸込
口端縁部３３ｃの端に接触するように位置する。A convex portion 34 is formed on the inner surface of the fan casing 34.
c is provided, and the seal member 3 is fitted to the convex portion 34c and fixedly adhered to the back surface of the bell mouth portion 34b.
5 is positioned so as to contact the end of the suction port end edge portion 33c of the front shroud 33a of the centrifugal impeller 33.
【００２１】シール部材３５は、弾性に富み、かつ摩擦
係数が小さく、さらには高耐熱性の材料を用いることが
望ましい。シール部材３５の材料としては、弾性率２０
〜５０kg／cm2 の弾性体、例えば遠心多孔質のポリテト
ラフロロエチレン樹脂等が用いられ、これらのシート材
を打ち抜いて環状体を形成する。The seal member 35 is preferably made of a material having high elasticity, a small friction coefficient, and high heat resistance. The material of the seal member 35 has an elastic modulus of 20.
An elastic body of ˜50 kg / cm 2 , for example, a centrifugal porous polytetrafluoroethylene resin or the like is used, and these sheet materials are punched out to form an annular body.
【００２２】遠心羽根車３３が回転すると、遠心翼３３
ｄは、前面シュラウド３３ａの吸込口３３ｂから吸い込
んだ空気を加速してその外周から吐出する。この吐出空
気は遠心羽根車３３の流路後段側に位置する固定案内羽
根３１に回収されて電動機部２０側に案内されるが、一
部は前面シュラウド３３ａとファンケーシング３４の間
に流れ込んで外部の圧力を高める。シール部材３５は、
この吐出空気が吸込口３３ｂに還流するのを防止する。When the centrifugal impeller 33 rotates, the centrifugal blade 33
In d, the air sucked from the suction port 33b of the front shroud 33a is accelerated and discharged from the outer periphery thereof. The discharged air is collected by the fixed guide vanes 31 located on the downstream side of the flow path of the centrifugal impeller 33 and guided to the electric motor unit 20 side, but a part of the discharged air flows between the front shroud 33a and the fan casing 34, and is discharged to the outside. Increase the pressure of. The seal member 35 is
This discharge air is prevented from flowing back to the suction port 33b.
【００２３】電動送風機１０が組み立てられたとき、前
記シール部材３５は前記遠心羽根車３３の前面シュラウ
ド３３ａの吸込口端縁部３３ｃを押圧するように接触し
て弾性変形状態となり、電動送風機１０の最初の運転に
よる遠心羽根車３３の回転で前面シュラウド３３ａの吸
込口端縁部３３ｃの端で削り取られることにより、シー
ル部材３５と前面シュラウド３３ａの吸込口端縁部３３
ｃと軽い摺接状態となる。従って、組立時の押圧弾性変
形することが重要であり、そのために材料の弾性率が重
要である。本発明では弾性率が２０kg／cm2 以下である
と取扱性，組立作業性の取付精度が低下し、逆に５０kg
／cm2 以上であると押圧した場合のメカロス、または羽
根車の変形等の問題がでることがわかった。また、シー
ル部材３５と前面シュラウドとの摺接する深さは、シー
ル部材３５の厚みｔの５０％以下とした。深さが５０％
以上となるとシール部材３５の圧縮により急激に弾性率
が増加し、前述のメカロス等の問題発生の恐れがある。When the electric blower 10 is assembled, the seal member 35 is brought into contact with the suction shroud 33a of the centrifugal impeller 33 so as to press the suction port end edge portion 33c so as to be elastically deformed, and the electric blower 10 When the centrifugal impeller 33 is rotated by the first operation, the seal member 35 and the suction port edge 33 of the front shroud 33a are scraped off at the edge of the suction port edge 33c of the front shroud 33a.
It is in a state of light sliding contact with c. Therefore, it is important that the material is elastically deformed under pressure during assembly, and therefore the elastic modulus of the material is important. In the present invention, when the elastic modulus is 20 kg / cm 2 or less, the handling accuracy and the assembly accuracy of the assembling workability decrease, and conversely 50 kg.
It was found that problems such as mechanical loss when pressed or deformation of the impeller occur when the pressure is more than / cm 2 . The depth of sliding contact between the seal member 35 and the front shroud is set to 50% or less of the thickness t of the seal member 35. 50% depth
In the above case, the compression of the seal member 35 causes a rapid increase in the elastic modulus, which may cause problems such as the mechanical loss described above.
【００２４】そして、その後の送風運転では軽い摺接状
態で循環流の発生を防止するので大きな摩擦抵抗とはな
らず、また、ポリトラフロロエチレン樹脂自体の摩擦係
数が低いため、摩擦損失を低く抑えることができる。従
って、摩擦による発熱量が少なく、更に、ポリテトラフ
ロロエチレン樹脂は耐熱性が高いので熱変形による固渋
や循環流の発生を招来する心配はない。In the subsequent blowing operation, the generation of a circulating flow is prevented in a light sliding contact state so that a large frictional resistance is not obtained, and the friction coefficient of the polytrafluoroethylene resin itself is low, so that the friction loss is low. Can be suppressed. Therefore, the amount of heat generated by friction is small, and since the polytetrafluoroethylene resin has high heat resistance, there is no fear of causing solidification and a circulation flow due to thermal deformation.
【００２５】図３に、シール部材３５をファンケーシン
グ３４に取り付ける他の実施例を示す。FIG. 3 shows another embodiment in which the seal member 35 is attached to the fan casing 34.
【００２６】弾性に富んだシール部材３５が遠心羽根車
３３に対して均一な押圧状態となるようにファンケーシ
ング３４の内面に高精度で取り付けるためには、取付け
時にシール部材３５が正確に位置決めされること、不均
一な力が作用して不均一な変形が発生しないようにする
ことが必要である。本実施例では、ファンケーシング３
４の内面に溶接固定した金属製の環状支持枠３６によっ
てシール部材３５の外周部をファンケーシング３４の内
面に挟持するように構成する。In order to attach the highly elastic seal member 35 to the inner surface of the fan casing 34 with high accuracy so that the centrifugal impeller 33 is pressed uniformly, the seal member 35 is accurately positioned at the time of attachment. In addition, it is necessary to prevent uneven deformation from occurring due to uneven force. In this embodiment, the fan casing 3
The outer peripheral portion of the seal member 35 is sandwiched by the inner surface of the fan casing 34 by a metal annular support frame 36 welded and fixed to the inner surface of the fan casing 34.
【００２７】環状支持枠３６は、シール部材３５の外周
を規制する環状凸部３６ａと滑りを押さえる押出し爪３
６ｂを備えている。ファンケーシング３４とシール部材
３５は環状支持枠３６の内径ｄより外周部で一体化固定
されているためｄより内周側のシール部材３５は、反ケ
ーシング側に撓むように形成される。また、図３では組
立作業や部品加工精度の働きにより遠心羽根車３３の前
面シュラウド３３ａとシール部材３５の間に隙間ｇが発
生した状態を示している。The annular support frame 36 has an annular projection 36a that regulates the outer periphery of the seal member 35 and the push-out claw 3 that suppresses slippage.
6b is provided. Since the fan casing 34 and the seal member 35 are integrally fixed at the outer peripheral portion with respect to the inner diameter d of the annular support frame 36, the seal member 35 on the inner peripheral side with respect to d is formed so as to bend toward the opposite casing side. Further, FIG. 3 shows a state in which a gap g is generated between the front shroud 33a of the centrifugal impeller 33 and the sealing member 35 due to the function of assembly work and component processing accuracy.
【００２８】そして、図３の状態で電動送風機が運転さ
れると、遠心羽根車３３の内部に負圧が発生する。シー
ル部材３５の環状支持枠３６の内径ｄの内側は、その負
圧に引き込まれ遠心羽根車側に撓み、前面シュラウド３
３ａに接触・摺接するようになり、前述の循環流を防止
することになる。発生する隙間ｇ，遠心羽根車３３の内
径，シール部材３５の厚みｔにより変わるが上記負圧に
より、弾性変形するためには、環状支持枠３６の内径ｄ
の内周側長さｌは、板圧ｔの１.５ 倍以上あることが必
要とされる。When the electric blower is operated in the state of FIG. 3, negative pressure is generated inside the centrifugal impeller 33. The inner side of the inner diameter d of the annular support frame 36 of the seal member 35 is drawn into the negative pressure and bends toward the centrifugal impeller side, and the front shroud 3
It comes into contact with and sliding contact with 3a, thereby preventing the above-mentioned circulating flow. Although it depends on the generated gap g, the inner diameter of the centrifugal impeller 33, and the thickness t of the seal member 35, in order to elastically deform due to the negative pressure, the inner diameter d of the annular support frame 36 is required.
It is necessary that the inner peripheral length l of the above is 1.5 times or more the plate pressure t.
【００２９】図５に本発明の実施例における消費電力１
０００Ｗ級の電気掃除機用電動送風機の従来例との特性
比較図を示す。FIG. 5 shows the power consumption 1 in the embodiment of the present invention.
The characteristic comparison figure with the conventional example of the electric blower for 000W class electric vacuum cleaners is shown.
【００３０】図５に示すように、消費電力、すなわち遠
心羽根車３３の摩擦損失を増大することなく、空力的に
は約５０mmＨ2Ｏ の静圧増加が得られることが分かる。As shown in FIG. 5, it is understood that the static pressure increase of about 50 mmH 2 O can be obtained aerodynamically without increasing the power consumption, that is, the friction loss of the centrifugal impeller 33.
【００３１】延伸多孔質のポリテトラフロロエチレン樹
脂を扁平形状の環状体に形成したシール部材３５は、遠
心羽根車３３の前面シュラウド３３ａの吸込口端縁部３
３ｃを該シール部材３５が弾性変形するように押圧して
も摩擦抵抗は僅少であるため、初期の運転時に該遠心羽
根車３３をロックさせるようなことはない。従って、電
動送風機１０の軸方向組立て許容誤差が大きくなり、ま
た、前面シュラウド３３ａの吸込口端縁部３３ｃとファ
ンケーシング３４の間に分厚いシール部材を配置するた
めの大きな隙間は必要がないことから電動送風機１０の
軸方向寸法の増加を抑えることができる。The seal member 35, which is made of stretched porous polytetrafluoroethylene resin in the shape of a flat ring, has a suction port end edge portion 3 of the front shroud 33 a of the centrifugal impeller 33.
Even if the seal member 35 is pressed so that the seal member 35 is elastically deformed, the frictional resistance is small, so that the centrifugal impeller 33 is not locked during the initial operation. Therefore, the axial assembly tolerance of the electric blower 10 becomes large, and there is no need for a large gap for disposing a thick seal member between the suction port end edge portion 33c of the front shroud 33a and the fan casing 34. It is possible to suppress an increase in the axial dimension of the electric blower 10.
【００３２】そして、遠心羽根車３３の初期の回転によ
って押圧部が削り取られた後の摺接状態では、摺接部の
摩擦抵抗は僅少であって摩擦損失が還流遮断による効率
向上を上回ることはないことが分かった。In the sliding contact state after the pressing portion is scraped off by the initial rotation of the centrifugal impeller 33, the frictional resistance of the sliding contact portion is small, and the friction loss does not exceed the efficiency improvement due to the circulation interruption. I found it wasn't.
【００３３】[0033]
【発明の効果】本発明によれば、弾性体にて形成された
シール部材を羽根車に押接するようにファンケーシング
に設けているので、弾性変形によって羽根車との間に押
圧が発生して該羽根車をロックすることがなく、また押
圧された部分は羽根車の初期の回転によって削り取られ
てしまうので、その後の運転時の摺動による摩擦抵抗は
少なくなり、摩擦損失の増加が抑制され、循環流を確実
に防止して送風機効率を向上させることができる。According to the present invention, since the seal member formed of the elastic body is provided on the fan casing so as to be pressed against the impeller, the elastic deformation causes the pressing against the impeller. Since the impeller is not locked and the pressed portion is scraped off by the initial rotation of the impeller, the frictional resistance due to sliding during the subsequent operation is reduced, and the increase in friction loss is suppressed. Therefore, it is possible to reliably prevent the circulating flow and improve the efficiency of the blower.
【００３４】また、組立ばらつきなどで羽根車の前面シ
ュラウドとシール部材の間に隙間が生じても、遠心羽根
車が回転した時に発生する負圧によりシール部材の内周
側が撓んで引き込まれ、前面シュラウド端面に接触・摺
動するので、循環流を防止することができる。Even if a gap is created between the front shroud of the impeller and the seal member due to variations in assembly or the like, the negative pressure generated when the centrifugal impeller rotates causes the inner peripheral side of the seal member to bend and to be drawn in. Circulating flow can be prevented because it contacts and slides on the end surface of the shroud.
【図１】本発明になる電動送風機の縦断側面図である。FIG. 1 is a vertical cross-sectional side view of an electric blower according to the present invention.
【図２】図１に示す電動送風機の送風機部におけるシー
ル部の縦断側面図である。FIG. 2 is a vertical cross-sectional side view of a seal portion in a blower portion of the electric blower shown in FIG.
【図３】図１に示す電動送風機の送風機部におけるシー
ル部の変形例を示す縦断側面図である。FIG. 3 is a vertical cross-sectional side view showing a modified example of the seal portion in the blower portion of the electric blower shown in FIG.
【図４】図３に示す電動送風機の運転時の送風機部にお
けるシール部を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a seal portion in a blower unit during operation of the electric blower shown in FIG.
【図５】図１に示す本発明になる電動送風機と従来の電
動送風機における特性比較図である。FIG. 5 is a characteristic comparison diagram between the electric blower according to the present invention and the conventional electric blower shown in FIG. 1.
１０…電動送風機、２０…電動機部、３０…送風機部、
３１…固定案内羽根、３３…遠心羽根車、３３ａ…前面
シュラウド、３４…ファンケーシング、３５…シール部
材。10 ... Electric blower, 20 ... Electric motor part, 30 ... Blower part,
31 ... Fixed guide blade, 33 ... Centrifugal impeller, 33a ... Front shroud, 34 ... Fan casing, 35 ... Seal member.
Claims (4)
車の流路後段側に配置された固定案内羽根と、前記羽根
車及び固定案内羽根を覆うファンケ−シングとを備え、
前記羽根車は、前記ファンケ−シングの吸い込み口に対
向する前面シュラウドの吸い込み口から空気を吸い込ん
で前記固定案内羽根に吐出する電動送風機において、弾
性体により形成した環状のシール部材を前記シュラウド
の吸込口端縁に摺接するように前記ファンケーシングの
内面に設け、前設シール部材は弾性率２０〜５０kg／cm
2 の部材にて構成したことを特徴とする電動送風機。1. An impeller attached to and fixed to a rotating shaft, a fixed guide vane disposed on a downstream side of a flow path of the impeller, and a fan casing covering the impeller and the fixed guide vane.
The impeller is an electric blower that sucks air from a suction port of a front shroud facing a suction port of the fan casing and discharges the air to the fixed guide vanes. An annular seal member formed of an elastic body is sucked into the shroud. It is provided on the inner surface of the fan casing so as to be in sliding contact with the edge of the mouth, and the front seal member has an elastic modulus of 20 to 50 kg / cm.
An electric blower composed of two members.
前面シュラウドとの摺接する深さをシール部材の厚みの
０〜５０％としたことを特徴とする電動送風機。2. The electric blower according to claim 1, wherein the depth of sliding contact between the seal member and the front shroud is 0 to 50% of the thickness of the seal member.
車の流路後段側に配置された固定案内羽根と、前記羽根
車及び固定案内羽根を覆うファンケーシングとを備え、
前記羽根車は、前記ファンケーシングの吸い込み口に対
向する前面シュラウドの吸い込み口から空気を吸い込ん
で前記固定案内羽根に吐出する電動送風機において、弾
性体により形成した環状のシール部材を前記シュラウド
の吸込口端縁に摺接するように前記ファンケーシングの
内面に設け、該シール部材は外周部のみ固着し、内周面
は固着させないように構成したことを特徴とする電動送
風機。3. An impeller mounted and fixed to a rotating shaft, a fixed guide vane arranged on the downstream side of the flow path of the impeller, and a fan casing covering the impeller and the fixed guide vane.
The impeller is an electric blower that sucks air from a suction port of a front shroud facing the suction port of the fan casing and discharges the air to the fixed guide vanes. An annular seal member formed of an elastic body is used for the suction port of the shroud. An electric blower characterized in that it is provided on the inner surface of the fan casing so as to be in sliding contact with the edge, and the sealing member is fixed only on the outer peripheral portion and not fixed on the inner peripheral surface.
させない内周側の径方向長さは、厚みの１.５〜４ 倍に
なるように構成したことを特徴とする電動送風機。4. The electric blower according to claim 3, wherein the radial length on the inner peripheral side of the seal member which is not fixed is 1.5 to 4 times the thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6001499A JP2987286B2 (en) | 1994-01-12 | 1994-01-12 | Electric blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6001499A JP2987286B2 (en) | 1994-01-12 | 1994-01-12 | Electric blower |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29550598A Division JP3330548B2 (en) | 1994-01-12 | 1998-10-16 | Electric blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07208390A true JPH07208390A (en) | 1995-08-08 |
| JP2987286B2 JP2987286B2 (en) | 1999-12-06 |
Family
ID=11503163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6001499A Expired - Fee Related JP2987286B2 (en) | 1994-01-12 | 1994-01-12 | Electric blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2987286B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0874160A3 (en) * | 1997-04-23 | 1999-11-17 | BSH Bosch und Siemens Hausgeräte GmbH | Fan device |
| WO2003029657A1 (en) * | 2001-10-01 | 2003-04-10 | BSH Bosch und Siemens Hausgeräte GmbH | Device for application in a fan arrangement |
| JP2010057816A (en) * | 2008-09-05 | 2010-03-18 | Hitachi Appliances Inc | Washing and drying machine, and drying machine |
| DE19855905B4 (en) * | 1998-12-03 | 2013-02-21 | BSH Bosch und Siemens Hausgeräte GmbH | blower assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017209577A1 (en) * | 2017-06-07 | 2018-12-13 | Hanon Systems | Fan impeller and heating, ventilation and / or air conditioning system with a blower impeller |
-
1994
- 1994-01-12 JP JP6001499A patent/JP2987286B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0874160A3 (en) * | 1997-04-23 | 1999-11-17 | BSH Bosch und Siemens Hausgeräte GmbH | Fan device |
| DE19855905B4 (en) * | 1998-12-03 | 2013-02-21 | BSH Bosch und Siemens Hausgeräte GmbH | blower assembly |
| WO2003029657A1 (en) * | 2001-10-01 | 2003-04-10 | BSH Bosch und Siemens Hausgeräte GmbH | Device for application in a fan arrangement |
| US7101148B2 (en) | 2001-10-01 | 2006-09-05 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Device for use in a blower configuration |
| JP2010057816A (en) * | 2008-09-05 | 2010-03-18 | Hitachi Appliances Inc | Washing and drying machine, and drying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2987286B2 (en) | 1999-12-06 |
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