JPH07217588A - Regenerative blower - Google Patents

Regenerative blower

Info

Publication number
JPH07217588A
JPH07217588A JP1170694A JP1170694A JPH07217588A JP H07217588 A JPH07217588 A JP H07217588A JP 1170694 A JP1170694 A JP 1170694A JP 1170694 A JP1170694 A JP 1170694A JP H07217588 A JPH07217588 A JP H07217588A
Authority
JP
Japan
Prior art keywords
blade
impeller
peripheral edge
area
blades
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.)
Withdrawn
Application number
JP1170694A
Other languages
Japanese (ja)
Inventor
Yukikatsu Ozaki
幸克 尾崎
Akikazu Kojima
昭和 小島
Mitsuo Inagaki
稲垣  光夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soken Inc
Original Assignee
Nippon Soken Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Soken Inc filed Critical Nippon Soken Inc
Priority to JP1170694A priority Critical patent/JPH07217588A/en
Publication of JPH07217588A publication Critical patent/JPH07217588A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00Other rotary non-positive-displacement pumps
    • F04D23/008Regenerative pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Abstract

PURPOSE:To prevent the occurrence of an adverse influence exercised on a swirl flow of gas and to improve aerodymanic characteristics by a method wherein a small part in the vicinity of the inner peripheral edge of a blade formed at an impeller is smoothly bent and inclined in a direction opposite to the rotation direction of the impeller. CONSTITUTION:In the impeller 2 of a regenerative blower, a part 9a inclined so that an inlet angle alpha is 70 deg. is formed at a blade 9. The inner end parts of the blades 9 are eliminated at intervals of one blade to form a blade 12 having a shortened length so that the increase of the area of the end face in an axial direction of the blade 9 by the end face in an axial direction of the inclined part 9a of the blade 9 is suppressed to a low value. By alternately arranging the ordinary blades 9 having the bent part and the blades 12 having a shortened length, the area of the end face in an axial direction of the blade 9 close to an inner peripheral edge 11 is reduced to a half. The probability of a warp and the generation of resistance owing to collision of air with the end face in an axial direction of the blade 9 when a swirl flow of air flowing along an annular flow passage in a casing with which the impeller 2 is surrounded flows to a blade groove part 8 is reduced and the aerodynamic characteristics of the impeller 2 are improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、各種の機械装置の空気
供給源として使用することができる渦流ブロアに係り、
特に、従来のものよりも優れた性能を得るために、羽根
車の形状を改善して空力特性を向上させた渦流ブロアに
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vortex blower which can be used as an air supply source for various mechanical devices,
In particular, the present invention relates to a swirl blower in which the shape of an impeller is improved to improve aerodynamic characteristics in order to obtain superior performance to conventional ones.

【0002】[0002]

【従来の技術】特開昭52−142313号公報や、日
本機械学会論文集(B編)45巻396号(昭54−
8)第1108頁〜第1116頁等に渦流ブロアの従来
技術が記載されている。渦流ブロアは比較的最近になっ
て開発されたものであるが、構造が比較的簡単であり、
小型でしかも低速回転であっても比較的高い吐出圧を得
ることができるという特長を有するので、内燃機関の排
気ガス中へ二次空気を供給して浄化する空気ポンプや、
燃焼装置において燃焼用の空気を供給する空気ポンプの
ような、各種の用途における圧力空気の供給源等として
利用することができる。
2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 52-142313 and Japanese Society of Mechanical Engineers, Volume 45, No. 396 (Sho 54-
8) Pages 1108 to 1116 and the like describe conventional techniques of swirl blowers. The swirl blower was developed relatively recently, but its structure is relatively simple,
Since it has a feature that it can obtain a relatively high discharge pressure even if it is small and rotates at low speed, an air pump that supplies secondary air into the exhaust gas of an internal combustion engine to purify it,
It can be used as a supply source of pressurized air in various applications such as an air pump for supplying combustion air in a combustion apparatus.

【0003】図7及び図8に従来の渦流ブロアの一例を
示す。一般に渦流ブロアは、主要な部品として、円形の
偏平なケーシング1と、その内部空間において回転可能
に支持されている円盤状の羽根車2とを有する。ケーシ
ング1は周囲に環状の流路3を形成しており、流路3の
一部には吸入口4と吐出口5が円周方向に隣接して開口
している。この渦流ブロアが空気を圧送する用途に使用
される場合には、吸入口4は空気を取り入れるために図
示しないエアクリーナ等を介して大気中に開口し、吐出
口5は適当な管路によって加圧空気を必要とする機器に
接続される。
7 and 8 show an example of a conventional vortex flow blower. Generally, a swirl blower has, as main components, a circular flat casing 1 and a disk-shaped impeller 2 rotatably supported in its internal space. The casing 1 has an annular flow passage 3 formed in the periphery thereof, and a suction port 4 and a discharge port 5 are opened in a part of the flow passage 3 so as to be adjacent to each other in the circumferential direction. When this swirl blower is used for pumping air, the suction port 4 opens to the atmosphere through an air cleaner or the like (not shown) to take in air, and the discharge port 5 is pressurized by an appropriate pipe line. Connected to equipment that requires air.

【0004】羽根車2は、その中心に取り付けられた駆
動軸6によってケーシング1の内部の定位置に支持され
ると共に、図示しないモータ等の動力源によって矢印R
の方向に回転駆動される。羽根車2の周縁部には、ケー
シング1の周縁部の環状の流路3に対応して、半径方向
に多数のリブ状の羽根7が残るように、図8に示すよう
な滑らかな曲面状の底面を有する多数の半径方向の羽根
溝部8が形成されている。従来の渦流ブロアにおいて
は、このように羽根7を羽根車2の半径方向と一致させ
て放射状に形成するのが一般的であった。
The impeller 2 is supported at a fixed position inside the casing 1 by a drive shaft 6 attached to the center of the impeller 2, and is indicated by an arrow R by a power source such as a motor (not shown).
It is driven to rotate in the direction. A smooth curved surface shape as shown in FIG. 8 is formed on the peripheral edge portion of the impeller 2 so as to leave a large number of rib-shaped blades 7 in the radial direction corresponding to the annular flow path 3 of the peripheral edge portion of the casing 1. A large number of radial blade grooves 8 having a bottom surface are formed. In the conventional swirl blower, it is general that the blades 7 are radially formed so as to match the radial direction of the impeller 2.

【0005】この渦流ブロアの運転状態において、羽根
車2がケーシング1内で矢印Rの方向に回転すると、羽
根車2の周縁部の羽根溝部8内にある空気は羽根7に押
されて環状の流路3内を円周に沿って矢印Rの方向に送
られるが、それによって空気には遠心力が作用して、図
8に矢印Oとして示したように羽根溝部8内から放射状
に環状の流路3へ流出する空気の流れが発生する。流出
する空気の流れが生じると羽根溝部8内は僅かに低圧と
なるから、それに向かって矢印Iのように環状の流路3
から流入する空気の流れが生じ、羽根溝部8から流出す
る流れと、羽根溝部8へ流入する流れによって空気の旋
回流(渦流)が形成される。
When the impeller 2 rotates in the casing 1 in the direction of the arrow R in the operating state of the vortex blower, the air in the blade groove 8 at the peripheral edge of the impeller 2 is pushed by the blades 7 to form an annular shape. The air is sent along the circumference in the direction of the arrow R in the flow path 3, whereby a centrifugal force acts on the air, and as shown by the arrow O in FIG. A flow of air flowing out to the flow path 3 is generated. When the flow of the outflowing air occurs, the pressure inside the blade groove portion 8 becomes slightly low, and therefore, the annular flow path 3 as shown by the arrow I is directed toward it.
A flow of air that flows in from the blade groove portion 8 is generated, and a flow that flows out from the blade groove portion 8 and a flow that flows into the blade groove portion 8 form a swirling flow (vortex flow) of air.

【0006】その結果、羽根溝部8内にある空気だけで
はなく、羽根溝部8の外の環状の流路3内にある空気
も、羽根車2の回転による羽根7の移動に随伴して、環
状の流路3内を円周に沿って矢印Rの方向に移動し、そ
の間に漸次圧力が上昇して吐出口5から外部へ送り出さ
れるので、送り出された分に見合う量だけ吸入口4から
新たな空気が環状の流路3内へ吸入されることになる。
渦流ブロアはこのようにして小型でも空気を比較的高圧
まで加圧して連続的に送り出すことができる。
As a result, not only the air in the blade groove portion 8 but also the air in the annular flow path 3 outside the blade groove portion 8 are accompanied by the movement of the blades 7 due to the rotation of the impeller 2, and the annular shape. Since the pressure moves gradually in the flow path 3 in the direction of the arrow R along the circumference and is discharged from the discharge port 5 to the outside during that time, a new amount from the suction port 4 is newly supplied from the discharge port 5 in an amount commensurate with the discharged amount. Fresh air is sucked into the annular flow path 3.
In this way, the vortex blower can pressurize the air to a relatively high pressure and send it out continuously even if it is small.

【0007】前述のように、従来の渦流ブロアにおいて
は羽根車2に対して羽根7、従って羽根溝部8を半径方
向に放射状に形成するのが一般的であったが、渦流ブロ
アの性能を向上させるために今までにも多くの改良が加
えられて来ており、その一つとして、回転している羽根
車2の羽根溝部8内へ空気の旋回流が流入し易いように
して空力特性を改善するために、図10に示した第2の
従来例における羽根9のように、羽根のうちで羽根車2
の外周縁10に近い外端部分は図7に示した羽根7と同
様に半径方向とするが、内周縁11に近い3分の1程度
の内端部分9aは全て同じように滑らかに屈曲させて、
半径方向の直線に対して所定の角度(これを入口角αと
呼ぶ)をなすように、矢印Rの回転方向とは反対の方向
に傾斜させるという提案がなされている。
As described above, in the conventional swirl blower, it is general to form the blades 7, and thus the blade groove portions 8 radially with respect to the impeller 2, but the performance of the swirl blower is improved. Many improvements have been made so far in order to improve the aerodynamic characteristics by making it easier for a swirling flow of air to flow into the blade groove portion 8 of the rotating impeller 2. In order to improve, like the blade 9 in the second conventional example shown in FIG.
The outer end portion near the outer peripheral edge 10 of the blade is in the radial direction like the blade 7 shown in FIG. 7, but the inner end portion 9a of about one-third near the inner peripheral edge 11 is all smoothly bent in the same manner. hand,
It has been proposed to incline in a direction opposite to the direction of rotation of arrow R so as to form a predetermined angle (referred to as an entrance angle α) with respect to a straight line in the radial direction.

【0008】[0008]

【発明が解決しようとする課題】図9及び図10に示し
た第2の従来例のように、羽根9の内端部分の全てに屈
曲して傾斜した部分9aを設けると、傾斜した部分9a
の傾き、即ち入口角αが増加するに従って、図9のよう
に見た場合に、羽根9の内周縁11側の領域においては
傾斜した部分9aの羽根の軸方向端面の占める面積が増
加し、羽根の密度が高くなるので、その分だけケーシン
グ1内の環状の流路3から空気の旋回流が羽根溝部8へ
流入し得る面積が減少する。従って、矢印Iのように流
入する空気の流れが反らされたり、流れの抵抗が大きく
なって、羽根溝部8における旋回流が弱くなるので、羽
根車2の空力特性を十分に向上させることができず、所
期の目的に反して渦流ブロアの性能が必ずしも改善され
ない。
As in the second conventional example shown in FIGS. 9 and 10, when the bent and inclined portion 9a is provided on all the inner end portions of the blade 9, the inclined portion 9a is formed.
As seen in FIG. 9, the area occupied by the axial end surface of the inclined portion 9a of the blade 9 increases in the region of the blade 9 on the inner peripheral edge 11 side as the inclination, that is, the inlet angle α increases. Since the density of the blades is increased, the area in which the swirling flow of air can flow into the blade groove portion 8 from the annular flow path 3 in the casing 1 is correspondingly reduced. Therefore, the flow of the inflowing air is deflected as shown by the arrow I, or the flow resistance becomes large, and the swirling flow in the blade groove portion 8 becomes weak, so that the aerodynamic characteristics of the impeller 2 can be sufficiently improved. This is not possible, and the performance of the vortex blower is not necessarily improved contrary to the intended purpose.

【0009】図11の図表は、図9のように羽根9の全
てに同じ厚さの傾斜した部分9aを形成した場合に、羽
根車2の羽根9の内周縁11寄り3分の1の半径の領域
において、羽根の占める軸方向端面の面積が入口角αの
変化に対してどのように変化するかということを、図7
に示した第1の従来例のように全ての羽根7に屈曲部分
がなくて入口角αが0である場合を指数1と定めて、そ
れに対する割合として指数によって例示したものであ
る。この図から判るように、入口角αが0°の場合の面
積比の指数が1であるのに対し、羽根9に傾斜した部分
9aを設けたことによる羽根の内周縁11寄りの軸方向
端面の面積の増加によって、例えば、入口角αが35°
の場合の面積比の指数は1.07となっているので7%
の増加を示しており、入口角αが70°の場合の面積比
の指数は1.38となっているので38%の増加を示し
ている。
The diagram of FIG. 11 shows that when all the blades 9 are formed with inclined portions 9a having the same thickness as shown in FIG. 9, the radius of the one third of the blade 9 of the impeller 2 is closer to the inner peripheral edge 11. Fig. 7 shows how the area of the axial end surface occupied by the blades in the region of Fig. 7 changes with respect to the change of the entrance angle α.
The index 1 is defined as a case where all the blades 7 have no bent portion and the entrance angle α is 0 as in the first conventional example shown in FIG. As can be seen from this figure, the index of the area ratio when the inlet angle α is 0 ° is 1, whereas the blade 9 has the inclined portion 9a, the axial end surface near the inner peripheral edge 11 of the blade. Due to the increase in the area of, for example, the entrance angle α is 35 °
In case of, the area ratio index is 1.07, so it is 7%
And the index of the area ratio when the entrance angle α is 70 ° is 1.38, which represents an increase of 38%.

【0010】本発明は、これら第1及び第2の従来例に
見られるような従来の渦流ブロアの問題点に鑑み、羽根
車の羽根の端面がケーシング内の環状の流路から羽根の
間の溝部へ流入する気体の旋回流に及ぼす悪影響を防止
することによって、従来よりも空力特性に優れた渦流ブ
ロアを提供することを目的としている。
In view of the problems of the conventional vortex flow blower as seen in the first and second conventional examples, the present invention is such that the end face of the impeller blade is between the annular flow passage in the casing and the blade. It is an object of the present invention to provide a swirl blower having more excellent aerodynamic characteristics than before by preventing the adverse effect of the gas flowing into the groove on the swirling flow.

【0011】[0011]

【課題を解決するための手段】本発明は、前記の課題を
解決するための手段として、周縁部に環状の流路を形成
され吸入口と吐出口を備えている円形のケーシングと、
前記ケーシングの内部で回転可能に支持されている羽根
車と、前記羽根車の周縁部に多数設けられることによっ
て隣接するものとの間に概ね放射状の羽根溝部を形成す
ると共に、前記羽根車の外周縁に近い大部分は実質的に
半径方向であり、内周縁に近い小部分は滑らかに屈曲し
て半径方向の直線に対して所定の入口角をなすように、
前記羽根車の回転方向とは反対の方向に傾斜している複
数の羽根とを備えており、前記羽根車の内周縁寄りの半
径方向に一定の幅を有する領域における前記羽根の軸方
向端面の面積が、前記外周縁寄りの半径方向に同じ幅を
有する領域における前記羽根の軸方向端面の面積よりも
小さくなるように設定されていることを特徴とする渦流
ブロアを提供する。
Means for Solving the Problems The present invention, as means for solving the above-mentioned problems, comprises a circular casing having an inlet and an outlet formed with an annular flow path in the peripheral portion,
A substantially radial blade groove is formed between an impeller rotatably supported inside the casing and a plurality of impellers that are provided in the peripheral portion of the impeller and are adjacent to each other. A large portion near the peripheral edge is substantially radial, and a small portion near the inner peripheral edge bends smoothly to form a predetermined inlet angle with respect to a radial straight line.
A plurality of blades that are inclined in a direction opposite to the rotation direction of the impeller, and the axial end surface of the blade in a region having a constant width in the radial direction near the inner peripheral edge of the impeller. The swirl blower is characterized in that the area is set to be smaller than the area of the axial end faces of the blades in the region having the same width in the radial direction toward the outer peripheral edge.

【0012】[0012]

【作用】本発明の渦流ブロアの基本的な作動は先に説明
した従来の渦流ブロアのそれと同じである。羽根車に形
成された羽根の外周縁に近い大部分が実質的に半径方向
であるのに対して、内周縁に近い小部分は滑らかに屈曲
して羽根車の回転方向とは反対の方向に傾斜しているの
で、羽根車が回転していてもケーシングの周縁部の環状
の流路から羽根の間の溝部へ流入する気体の旋回流は比
較的円滑に導かれる。
The basic operation of the swirl blower of the present invention is the same as that of the conventional swirl blower described above. The majority of the blades formed on the impeller near the outer peripheral edge are substantially radial, while the small portion near the inner peripheral edge bends smoothly in a direction opposite to the rotational direction of the impeller. Since the blades are inclined, the swirling flow of the gas flowing from the annular flow passage in the peripheral portion of the casing into the groove portion between the blades is guided relatively smoothly even when the impeller rotates.

【0013】これに加えて、本発明においては、羽根車
の内周縁寄りの半径方向に一定の幅を有する領域におけ
る羽根、即ち各羽根の内端部分の軸方向端面の面積が、
外周縁寄りの半径方向に同じ幅を有する領域における羽
根、即ち各羽根の外端部分の軸方向端面の面積よりも小
さくなるように設定されているので、ケーシングの周縁
部の環状の流路から羽根の間の溝部へ流入する旋回流を
形成している気体が、羽根の軸方向端面に衝突して反ら
されたり、抵抗を受けたりする確率が小さくなり、より
一層円滑に羽根溝部内へ流入することができるので、本
発明の渦流ブロアにおいては従来の渦流ブロアに比べて
羽根車の空力特性が向上する。
In addition to this, in the present invention, the area of the blades in the region having a constant width in the radial direction toward the inner peripheral edge of the impeller, that is, the area of the axial end surface of the inner end portion of each blade is
Since it is set to be smaller than the area of the blade in the region having the same width in the radial direction toward the outer peripheral edge, that is, the axial end surface of the outer end portion of each blade, The gas that forms the swirling flow that flows into the groove between the blades is less likely to collide with the axial end surface of the blade and be warped or receive resistance, so that it enters the blade groove more smoothly. Since it can flow in, the aerodynamic characteristics of the impeller are improved in the swirl blower of the present invention as compared with the conventional swirl blower.

【0014】[0014]

【実施例】図1及び図2は本発明の第1実施例を示すも
ので、この実施例では、図9に示した第2の従来例と同
様に、羽根車2の羽根9に入口角αが70°となるよう
に傾斜した部分9aを形成するが、羽根の傾斜した部分
9aの軸方向端面による羽根の軸方向端面の面積の増加
を低く抑えるために、羽根9の内端部分、この例では内
周縁11寄りの羽根9の3分の1の部分を1枚おきに削
除して、長さの短い羽根12を形成した点に特徴があ
る。
1 and 2 show a first embodiment of the present invention. In this embodiment, as in the second conventional example shown in FIG. The inclined portion 9a is formed so that α is 70 °, but in order to suppress an increase in the area of the axial end surface of the blade due to the axial end surface of the inclined portion 9a of the blade, the inner end portion of the blade 9, In this example, one third of the blade 9 near the inner peripheral edge 11 is deleted every other sheet to form a blade 12 having a short length.

【0015】第1実施例の羽根車2においては、屈曲部
を有する通常の羽根9と長さの短い羽根12を交互に設
けることによって、内周縁11寄りの羽根の軸方向端面
における面積が半減するため、図8に示す矢印Iのよう
に環状の流路3内の空気の旋回流が羽根溝部8へ流入す
る際に、羽根の軸方向端面に衝突して反らされたり、抵
抗を受けたりする確率が低くなり、羽根車2の空力特性
が向上して渦流ブロアの性能が従来よりも改善される。
In the impeller 2 of the first embodiment, the normal blade 9 having a bent portion and the short blade 12 are alternately provided, so that the area of the blade near the inner peripheral edge 11 in the axial end surface is halved. Therefore, when the swirling flow of air in the annular flow path 3 flows into the blade groove portion 8 as indicated by an arrow I shown in FIG. 8, the blade collides with the axial end surface of the blade and is warped or receives resistance. As a result, the aerodynamic characteristics of the impeller 2 are improved and the performance of the vortex blower is improved as compared with the conventional case.

【0016】図3及び図4は本発明の第2実施例を示す
もので、この実施例では、図9に示した第2の従来例に
おける羽根9と同様に、羽根車2に形成された羽根13
の全ての内周縁11寄りの部分を屈曲させて傾斜した部
分13aを形成しているが、傾斜した部分13aの羽根
の板厚t1 を、外周縁10寄りの部分の板厚t0 よりも
内端部分に向かって漸次薄くなるようにして、羽根13
の内端部分の軸方向端面における面積を減少させてい
る。このように羽根の板厚を変化させることによって
も、第1実施例と同様な効果を奏することができる。い
うまでもなく、第2実施例の場合は全ての羽根13が傾
斜した部分13aを有するので、羽根溝部8への旋回流
の導入は、羽根の全ての部分が半径方向であるものより
も円滑に行われる。
FIGS. 3 and 4 show a second embodiment of the present invention. In this embodiment, like the blade 9 in the second conventional example shown in FIG. 9, it is formed in the impeller 2. Feather 13
All the portions near the inner peripheral edge 11 are bent to form the inclined portion 13a, but the blade thickness t 1 of the inclined portion 13a is smaller than the plate thickness t 0 of the portion closer to the outer peripheral edge 10. The blade 13 is gradually thinned toward the inner end.
The area at the axial end surface of the inner end portion of is reduced. By changing the plate thickness of the blade in this way, the same effect as in the first embodiment can be obtained. Needless to say, in the case of the second embodiment, since all the blades 13 have the inclined portion 13a, the introduction of the swirling flow into the blade groove portion 8 is smoother than that in which all the blade portions are in the radial direction. To be done.

【0017】図5及び図6は本発明の第3実施例を示す
もので、この実施例の特徴は、図6に示すように羽根車
2の羽根溝部14の断面形状が半円形となっていること
と、図5に示す羽根15の軸方向端面の屈曲した形状
が、図1に示された第1実施例と同様に、1枚おきに内
周縁11寄りの部分において削除されて長さの短い羽根
16となっていることである。なお、この例の入口角α
は70°となっている。羽根溝部14の断面形状を半円
形とすることによって、同様に半円形の断面形状を有す
る環状の流路3との間で、空気の旋回流のために略円形
断面の旋回流路が形成されるので、旋回流に対する抵抗
が一層少なくなって羽根車の空力特性を向上させるのに
役立つほか、第1実施例と同様な効果をも奏することが
できる。
5 and 6 show a third embodiment of the present invention. The feature of this embodiment is that the blade groove portion 14 of the impeller 2 has a semicircular cross section as shown in FIG. And that the bent shape of the axial end surface of the blade 15 shown in FIG. 5 is deleted every other sheet at the portion near the inner peripheral edge 11 as in the first embodiment shown in FIG. The blade 16 is short. Note that the inlet angle α in this example
Is 70 °. By making the cross-sectional shape of the blade groove portion 14 semi-circular, a swirl flow path having a substantially circular cross-section is formed between the annular flow path 3 having a semi-circular cross-sectional shape and a swirl flow of air. Therefore, the resistance against the swirling flow is further reduced, which is useful for improving the aerodynamic characteristics of the impeller, and the same effects as those of the first embodiment can be obtained.

【0018】[0018]

【発明の効果】本発明によれば、従来の渦流ブロアの問
題点が実質的に解消し、羽根車の羽根の端面がケーシン
グ内の環状の流路から羽根の間の溝部へ流入する気体の
旋回流に及ぼす悪影響が軽減されるので、従来よりも空
力特性に優れた効率の高い渦流ブロアを提供することが
できる。
According to the present invention, the problems of the conventional vortex flow blower are substantially eliminated, and the end faces of the impeller blades of the impeller flow into the groove portion between the annular flow passages in the casing. Since the adverse effect on the swirling flow is reduced, it is possible to provide a highly efficient swirl blower having excellent aerodynamic characteristics as compared with the conventional one.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1実施例を示す羽根車の断面図であ
る。
FIG. 1 is a sectional view of an impeller showing a first embodiment of the present invention.

【図2】図1におけるII−II断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.

【図3】本発明の第2実施例を示す羽根車の断面図であ
る。
FIG. 3 is a sectional view of an impeller showing a second embodiment of the present invention.

【図4】図3におけるIV−IV断面図である。4 is a sectional view taken along line IV-IV in FIG.

【図5】本発明の第3実施例を示す渦流ブロアの断面図
である。
FIG. 5 is a sectional view of a swirl blower showing a third embodiment of the present invention.

【図6】図5におけるVI−VI断面図である。6 is a sectional view taken along line VI-VI in FIG.

【図7】第1の従来例を示す渦流ブロアの断面図であ
る。
FIG. 7 is a cross-sectional view of a vortex flow blower showing a first conventional example.

【図8】図7におけるVIII−VIII断面図である。8 is a sectional view taken along line VIII-VIII in FIG.

【図9】第2の従来例を示す羽根車の断面図である。FIG. 9 is a cross-sectional view of an impeller showing a second conventional example.

【図10】図9におけるX−X断面図である。10 is a cross-sectional view taken along line XX in FIG.

【図11】入口角αと羽根の軸方向端面の面積との関係
を示す線図である。
FIG. 11 is a diagram showing a relationship between an entrance angle α and an area of an axial end surface of a blade.

【符号の説明】[Explanation of symbols]

1…ケーシング 2…羽根車 3…環状の流路 4…吸入口 5…吐出口 6…駆動軸 7…羽根(第1の従来例) 8…羽根溝部 9…羽根(第2の従来例) 9a…傾斜した部分 10…外周縁 11…内周縁 12…長さの短い羽根(第1実施例) 13…羽根(第2実施例) 13a…傾斜した部分 14…羽根溝部(第3実施例) 15…羽根 16…長さの短い羽根 DESCRIPTION OF SYMBOLS 1 ... Casing 2 ... Impeller 3 ... Annular flow path 4 ... Suction port 5 ... Discharge port 6 ... Drive shaft 7 ... Blade (first conventional example) 8 ... Blade groove portion 9 ... Blade (second conventional example) 9a ... Inclined portion 10 ... Outer peripheral edge 11 ... Inner peripheral edge 12 ... Short blade (first embodiment) 13 ... Blade (second embodiment) 13a ... Inclined portion 14 ... Blade groove (third embodiment) 15 … Feather 16… Feather with a short length

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 周縁部に環状の流路を形成され吸入口と
吐出口を備えている円形のケーシングと、 前記ケーシングの内部で回転可能に支持されている羽根
車と、 前記羽根車の周縁部に多数設けられることによって隣接
するものとの間に概ね放射状の羽根溝部を形成すると共
に、前記羽根車の外周縁に近い大部分は実質的に半径方
向であり、内周縁に近い小部分は滑らかに屈曲して半径
方向の直線に対して所定の入口角をなすように、前記羽
根車の回転方向とは反対の方向に傾斜している複数の羽
根とを備えており、 前記羽根車の内周縁寄りの半径方向に一定の幅を有する
領域における前記羽根の軸方向端面の面積が、前記外周
縁寄りの半径方向に同じ幅を有する領域における前記羽
根の軸方向端面の面積よりも小さくなるように設定され
ていることを特徴とする渦流ブロア。
1. A circular casing having an inlet and an outlet formed with an annular flow path at a peripheral edge thereof, an impeller rotatably supported inside the casing, and a peripheral edge of the impeller. By providing a large number of parts on the part to form a substantially radial vane groove part between adjacent ones, most of the impeller near the outer peripheral edge is substantially radial, and a small part near the inner peripheral edge is A plurality of blades that are inclined in a direction opposite to the rotation direction of the impeller so as to smoothly bend and form a predetermined inlet angle with respect to a straight line in the radial direction, The area of the axial end surface of the blade in the area having a constant width in the radial direction near the inner peripheral edge is smaller than the area of the axial end surface of the blade in the area having the same width in the radial direction near the outer peripheral edge. Is set as A swirl blower characterized by the following.
【請求項2】 前記羽根車の内周縁寄りの羽根の一部が
削除されている請求項1記載の渦流ブロア。
2. The swirl blower according to claim 1, wherein a part of the blade near the inner peripheral edge of the impeller is deleted.
【請求項3】 前記羽根車の内周縁寄りの羽根の板厚
が、前記外周縁寄りの羽根の板厚よりも薄くなっている
請求項1記載の渦流ブロア。
3. The swirl blower according to claim 1, wherein the blade of the impeller closer to the inner peripheral edge has a smaller thickness than the blade of the outer peripheral edge of the impeller.
JP1170694A 1994-02-03 1994-02-03 Regenerative blower Withdrawn JPH07217588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1170694A JPH07217588A (en) 1994-02-03 1994-02-03 Regenerative blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1170694A JPH07217588A (en) 1994-02-03 1994-02-03 Regenerative blower

Publications (1)

Publication Number Publication Date
JPH07217588A true JPH07217588A (en) 1995-08-15

Family

ID=11785496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1170694A Withdrawn JPH07217588A (en) 1994-02-03 1994-02-03 Regenerative blower

Country Status (1)

Country Link
JP (1) JPH07217588A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008388A1 (en) * 2005-02-24 2006-08-31 Gebr. Becker Gmbh & Co Kg Impeller wheel for side channel machine, e.g. compressors and vacuum pumps, has at least one guide rib between adjacent blades extending inwards into cross-sectional region(s) of radial outer edging of flow chamber
JP2007002836A (en) * 2005-05-27 2007-01-11 Hitachi Industrial Equipment Systems Co Ltd Blower
CN100422564C (en) * 2004-04-07 2008-10-01 株式会社电装 Impeller and fuel pump using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100422564C (en) * 2004-04-07 2008-10-01 株式会社电装 Impeller and fuel pump using the same
US7500820B2 (en) 2004-04-07 2009-03-10 Denso Corporation Impeller and fuel pump using the same
DE102005015821B4 (en) * 2004-04-07 2013-08-08 Denso Corporation Impeller and fuel pump using this
DE102005008388A1 (en) * 2005-02-24 2006-08-31 Gebr. Becker Gmbh & Co Kg Impeller wheel for side channel machine, e.g. compressors and vacuum pumps, has at least one guide rib between adjacent blades extending inwards into cross-sectional region(s) of radial outer edging of flow chamber
JP2007002836A (en) * 2005-05-27 2007-01-11 Hitachi Industrial Equipment Systems Co Ltd Blower

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