JPH0315699A - Impeller of axial blower - Google Patents
Impeller of axial blowerInfo
- Publication number
- JPH0315699A JPH0315699A JP14903289A JP14903289A JPH0315699A JP H0315699 A JPH0315699 A JP H0315699A JP 14903289 A JP14903289 A JP 14903289A JP 14903289 A JP14903289 A JP 14903289A JP H0315699 A JPH0315699 A JP H0315699A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- hub
- airflow
- vane
- 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.)
- Pending
Links
- 239000011148 porous material Substances 0.000 claims abstract description 12
- 230000035699 permeability Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 12
- 239000011347 resin Substances 0.000 abstract description 12
- 229920005989 resin Polymers 0.000 abstract description 12
- 238000004299 exfoliation Methods 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 11
- 238000007664 blowing Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、空気調和機などに用いられる軸流送風機の羽
根車に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an impeller for an axial blower used in an air conditioner or the like.
従来の技術
近年、軸流送風機の羽根車は、セパレート型空気調和機
などの送風機として、業務用から家庭用まで幅広く使用
されており、よう低騒音化が望１れる煩向にある。BACKGROUND OF THE INVENTION In recent years, impellers of axial flow fans have been widely used as blowers for separate air conditioners, from commercial to home use, and there is a growing demand for lower noise levels.
以下、図面を参照しながら、上述した従来の軸流送風機
の羽根車について説明する。Hereinafter, the impeller of the conventional axial flow blower mentioned above will be explained with reference to the drawings.
第３図，第４図は従来の軸流送風機の羽根車の構造を示
すものである。１は羽根車であり、２は全体あるいは一
部を通気性のある多孔質の金属焼結又は樹脂材料で形成
した複数枚の羽根板である。Figures 3 and 4 show the structure of a conventional axial blower impeller. Reference numeral 1 represents an impeller, and reference numeral 2 represents a plurality of vane plates formed entirely or partially of a porous sintered metal or resin material with air permeability.
３は羽根板２を固定したハブである。3 is a hub to which the blade plate 2 is fixed.
以上のように構成された細流送風機の羽根車について以
下その動作を説明する。The operation of the impeller of the trickle blower constructed as above will be described below.
１ず、羽根車１が所定の回転方向に回転すると、為す。1. When the impeller 1 rotates in a predetermined rotation direction, this occurs.
ここで第４図で示すように、気流が羽根板２の前縁部２
ａから流入し、前記羽根板の圧力面側４ａ，負圧面側４
ｂに沿って流れ、羽根板２の後縁部２ｂより流出し、所
定の方向に吹出される。又、羽根板２の負圧面側４ｂで
は気流の境界層が羽根板２の表面から剥がれる境界層の
剥離の現象があり、負圧面側４ｂ近傍での流れの乱れ及
び、羽根板２の負圧而側４ｂでの境界層剥離に伴う圧力
変動を起こす。このため、羽根板２の全体あるいは一部
を通気性のある多孔質の金属焼結又は樹脂材で形成する
ことによう、羽根板２の圧力面側４ａに沿って流れる気
流の一部が多孔質の金属焼結又は樹脂の気孔を通過して
羽根板２の負圧面側４ｂに吹出す。この吹出した気流が
負圧面側４ｂを流れることによう，負圧面側４ｂでの気
流境界層の剥離を押え、負圧面側４ｂ近傍での流れの乱
れ及び負圧面側４ｂでの境界層剥離に伴う圧力変動を抑
える。Here, as shown in FIG.
a, the pressure side 4a and the negative pressure side 4 of the vane plate.
b, flows out from the rear edge 2b of the vane plate 2, and is blown out in a predetermined direction. In addition, on the suction side 4b of the vane plate 2, there is a phenomenon of boundary layer separation in which the boundary layer of the airflow separates from the surface of the vane plate 2, which causes flow turbulence near the suction side 4b and the negative pressure on the vane plate 2. Pressure fluctuations occur due to boundary layer separation on the other side 4b. For this reason, if the entire or part of the vane plate 2 is made of a porous sintered metal or resin material that is breathable, a part of the airflow flowing along the pressure side 4a of the vane plate 2 is caused by the porous sintered metal or resin material. It passes through the pores of the sintered metal or resin and blows out to the negative pressure side 4b of the vane plate 2. In order for this blown airflow to flow on the suction side 4b, separation of the airflow boundary layer on the suction side 4b is suppressed, and flow turbulence near the suction side 4b and boundary layer separation on the suction side 4b are prevented. Reduces accompanying pressure fluctuations.
発明が解決しようとする課題
しかしながら、上記のような構成では、軸流送風機の羽
根車の翼間全体及び羽根板近傍の流れは流体に対して遠
心力が働くので、チップ側２Ｃに片寄って流れるため、
リプ側２ｄに比べチップ側２Ｃでの流量が大きくなシ、
ハブ側２ｄでは流量が減少する傾向がある。Problems to be Solved by the Invention However, in the above configuration, centrifugal force acts on the fluid in the entire space between the blades of the impeller of the axial blower and in the vicinity of the blade plate, so the flow is biased towards the tip side 2C. For,
The flow rate on the tip side 2C is larger than that on the lip side 2d.
The flow rate tends to decrease on the hub side 2d.
したがって、単に羽根板２全体あるいは一部を通気性の
ある多孔質の金属焼結材又は樹脂で形或するだけではチ
ップ側２Ｃでは必要以上の気流が通過してし筐い、羽根
板２による靜圧と動圧を付加する能力が低下し羽根車１
の空力性能が低下する。そのため、目的とする所定の空
力性能を得るためには回転数を増加させねばならず、送
風騒音が増加するという課題を有していた。Therefore, if the entire or part of the blade plate 2 is made of a porous metal sintered material or resin that is breathable, more airflow than necessary will pass through the chip side 2C, and the blade plate 2 The ability to apply static pressure and dynamic pressure is reduced, and impeller 1
Aerodynamic performance is reduced. Therefore, in order to obtain the desired aerodynamic performance, the number of revolutions must be increased, resulting in an increase in air blowing noise.
本発明は上記課題に鑑み、ハブ側２ｄの羽根板負圧面で
の気流の剥離を防ぎ、かつ、チップ側２ｃでの羽根板を
気流が通過しすぎることによる空カ性能の低下を抑える
軸流送風機の羽根車を提供するものである。In view of the above problems, the present invention provides an axial flow that prevents separation of airflow on the negative pressure surface of the blade plate on the hub side 2d, and suppresses deterioration in air performance due to airflow passing too much through the blade plate on the tip side 2c. It provides an impeller for a blower.
課題を解決するための手段
この目的を違戒するために本発明の遠心送風機の羽根車
は、複数の羽根板と、前記複数の羽根板を固定したハブ
とで構威され、前記羽根板の全体あるいは一部を通気性
のある多孔質材で形或し、かつ、前記羽根板の多孔質材
の開口率をハブ側からチップ側にかけて漸次小さくして
いる。Means for Solving the Problem In order to achieve this object, the impeller of the centrifugal blower of the present invention is composed of a plurality of blade plates and a hub to which the plurality of blade plates are fixed, and The blade plate is entirely or partially made of a porous material having air permeability, and the aperture ratio of the porous material of the vane plate is gradually reduced from the hub side to the tip side.
作 用
この構戒によって、気孔率の粗いハブ側では、羽根板の
圧力面側に沿って流れる気流の一部が通気性の多孔質材
の気孔を通過し羽根板の負圧面側に吹き出し、その吹き
出した気流が羽根板の負圧面側を流れることにより、負
圧面側での気流の境界眉の剥離を防ぎ、気孔率の細いチ
ップ側では負圧面側に必要以上に気流が吹き出すことな
く圧力面側を流れ羽根車外に吐出する。Effect: Due to this structure, on the hub side where the porosity is rough, a part of the airflow flowing along the pressure side of the vane passes through the pores of the porous material and blows out to the suction side of the vane. The blown airflow flows on the suction side of the vane, preventing separation of the airflow boundary on the suction side, and on the tip side with thin porosity, the airflow is not blown out more than necessary on the suction side. It flows through the surface side and is discharged outside the impeller.
実施例
以下、本発明の一実施例について図面を参照しながら説
明する。尚、従来例と同一部分については重複を避ける
ため、同一の番号を付けて説明を省略する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Incidentally, in order to avoid duplication, the same parts as in the conventional example are given the same numbers and the description thereof will be omitted.
第１図，第２図は本発明の一実施例に釦ける軸流送風機
の羽根車の構造を示すものである。６は細流送風機の羽
根車であり、６は全体あるいは一部を開孔率をハブ側６
ｃからチップ側６ａにかけて漸次小さくなる通気性のあ
る多孔質の金属焼結又は樹脂材で形成した複数の羽根板
である。1 and 2 show the structure of an impeller of an axial blower according to an embodiment of the present invention. 6 is the impeller of the trickle blower, and 6 is the entire or part of the perforation ratio on the hub side 6
They are a plurality of vanes made of a porous sintered metal or resin material with air permeability that gradually become smaller from c to the tip side 6a.
以上のように構成された軸流送風機の羽根車について以
下その動作を説明する。The operation of the impeller of the axial blower constructed as above will be described below.
羽根車５が所定の回転方向に回転すると、空気が羽根車
１内に流入し、羽根板６の作用で靜圧と動圧を付加され
て羽根車６外に吐出され送風作用を為す。When the impeller 5 rotates in a predetermined rotational direction, air flows into the impeller 1, is applied with static pressure and dynamic pressure by the action of the vane plate 6, and is discharged outside the impeller 6 to perform a blowing action.
ここで、羽根板６の全体あるいは一部を開孔率がハブ側
６Ｃからチップ側６ｄにかけて漸次小さくなる通気性の
ある多孔質の金属焼結又は樹脂材で形威することによシ
、羽根板６の圧力面側６ａに沿って流れる気流の一部が
気孔率の粗いハブ側６ｃでは通気性のある多孔質の金属
焼結又は樹脂材の気孔を通過し、羽根板６の負圧面側ら
ｂに吹き出し、この吹き出した気流が負圧面側６ｂを流
れることにより、ハブ側６ｃでの羽根板６負圧面ＩｌＩ
Ｉ６ｂにおける気流境界層の剥離を防ぎ、気孔率の細い
チップ側６ｃでは、圧力面側６ａから負圧面側６ｂに気
流が必要以上に吹き出すことなく圧力面側を流れ羽根車
５外へ吐出する。Here, by forming the entire or part of the vane plate 6 with a porous metal sinter or resin material with air permeability whose porosity gradually decreases from the hub side 6C to the tip side 6d, the vane can be A part of the airflow flowing along the pressure side 6a of the plate 6 passes through the pores of the porous sintered metal or resin material on the hub side 6c, which has a rough porosity, and is transferred to the suction side of the vane plate 6. b, and this blown airflow flows through the negative pressure side 6b, so that the negative pressure surface IlI of the vane plate 6 on the hub side 6c
Separation of the airflow boundary layer at I6b is prevented, and on the chip side 6c with a small porosity, the airflow is discharged from the pressure side to the outside of the flow impeller 5 without blowing out more than necessary from the pressure side 6a to the negative pressure side 6b.
以上のように本実施例によれば、羽根板６の全体あるい
は一部を開孔率がハブ側６ｃからチップ側６ｄにかけて
漸次小さくなる通気性のある多孔質の金属焼結材又は樹
脂材で形或することにより、気孔率の粗いハブ側６ｃで
は羽根板６の圧力面側６ａに沿って流れる気流の一部が
負圧面側らｂに吹き出し、この吹き出した気流が負圧面
側６ｂを流れることにより、負圧面側６ｂでの気流の境
界層の剥離を防ぎ、気流の乱れ及び境界層剥離に伴う負
圧面側での圧力変動を抑え、気孔率の細いチップ側６ｄ
では羽根板６部分では圧力面側６ａから負圧面６ｂに気
流が必要以上吹き出さず、気流が羽根板６を通過しすぎ
ることによる空力性能の低下を抑えることができ、送風
騒音の増加を抑えることができる。As described above, according to the present embodiment, the entire or part of the blade plate 6 is made of a porous metal sintered material or resin material with air permeability in which the perforation ratio gradually decreases from the hub side 6c to the tip side 6d. Due to the shape, a part of the airflow flowing along the pressure side 6a of the vane plate 6 is blown out from the suction side to b on the hub side 6c with a coarse porosity, and this blown airflow flows on the suction side 6b. This prevents separation of the airflow boundary layer on the suction side 6b, suppresses pressure fluctuations on the suction side due to airflow turbulence and boundary layer separation, and reduces the porosity of the chip side 6d.
In the vane plate 6 part, the airflow is not blown out from the pressure side 6a to the negative pressure side 6b more than necessary, and it is possible to suppress the deterioration of aerodynamic performance due to the airflow passing through the vane plate 6 too much, and suppress the increase in air blowing noise. be able to.
ｆａ５図は本発明の軸流送風機の羽根車と従来型の軸流
送風機の羽根車の騒音スペクトラム比較図である。第５
図より、実線ａで示される本発明の軸流送風機の羽根車
は、点線ｂで示される従来型の軸流送風機の羽根車と比
較すると１００Ｈｚから５０００Ｈｚ以上のほとんど全
周波数領域で効果があることがわかる。Figure fa5 is a noise spectrum comparison diagram between the impeller of the axial flow blower of the present invention and the impeller of the conventional axial flow blower. Fifth
The figure shows that the impeller of the axial blower of the present invention, indicated by the solid line a, is effective in almost the entire frequency range from 100 Hz to 5000 Hz or more, compared to the impeller of the conventional axial blower, indicated by the dotted line b. I understand.
第６図は本発明の軸流送風機の羽根車と従来型の軸流送
風機の羽根車の風量対靜圧、及び騒音の比較を示したが
、全風量域にわたって、送風性能が向上し、騒音が低減
されていることがわかる。Figure 6 shows a comparison of air volume vs. quiet pressure and noise between the impeller of the axial flow blower of the present invention and the impeller of a conventional axial flow blower. It can be seen that this has been reduced.
尚、第５図，第６図に示す実験データは実験条件を軸流
式羽根車φ３ ０ ０ ｍ ，羽根枚数３枚，回転数１
１０Ｏｒｐｍとした場合である。The experimental data shown in Figures 5 and 6 are based on the following experimental conditions: axial flow impeller φ300 m, number of blades 3, rotation speed 1.
This is a case where the rotation speed is 10 Orpm.
発明の効果
以上のように本発明の軸流送風機の羽根車は、複数の羽
根板と、前記複数の羽根板を固定したハブとで構成され
、前記羽根板の全体あるいは一部を通気性のある多孔質
材で形戒し、かつ、前記羽根板の多孔質材の開孔率をハ
ブ側からチップ側にかけて漸次小さくすることによう、
ハブ側での羽根板負圧面側の気流の境界層の剥離を防ぎ
流れの乱れ及び境界層剥離に伴う圧力変動を抑え、かつ
、チップ側での気流の圧力面側から負圧面側への通過を
抑えることで、空力性能の低下及び送風騒音の増加を抑
えることができる。Effects of the Invention As described above, the impeller of the axial blower of the present invention is composed of a plurality of vanes and a hub to which the plurality of vanes are fixed, and the vanes are entirely or partially made of air permeable material. A certain porous material is used, and the porosity of the porous material of the vane is gradually decreased from the hub side to the tip side,
Prevents separation of the boundary layer of the airflow on the suction side of the vane on the hub side, suppresses flow turbulence and pressure fluctuations due to boundary layer separation, and allows airflow to pass from the pressure side to the suction side on the tip side. By suppressing this, it is possible to suppress a decrease in aerodynamic performance and an increase in ventilation noise.
第１図は本発明の一実施例における軸流送風機の羽根車
の平面図、第２図ａは第１図のＡ−Ａ／断面図、第２図
ｂは第１図のＢ−Ｂ’断面図、第３図は従来の軸流送風
機の羽根車の平面図、第４図は第３図のＣ−Ｃ’断面図
、第５図は本発明の軸流送風機の羽根車と従来型の軸流
送風機の羽根車の騒音スペクトル比較図、第６図は本発
明の軸流送風機の羽根車と従来型の軸流送風機の羽根車
の風量対靜圧及び騒音の比較図である。
６・・・・・・軸流送風機の羽根車、３・・・・・・ハ
ブ、６・・・・・・多孔質の金属焼結材又は樹脂材の羽
根板、６ｃ・・・・・・チップ側、６ｄ・・・・・・ハ
ブ側。FIG. 1 is a plan view of an impeller of an axial blower according to an embodiment of the present invention, FIG. 3 is a plan view of an impeller of a conventional axial blower, FIG. 4 is a sectional view taken along line CC' in FIG. 3, and FIG. FIG. 6 is a comparison diagram of the air volume versus quiet pressure and noise of the impeller of the axial flow blower of the present invention and the impeller of a conventional axial flow blower. 6... Impeller of axial blower, 3... Hub, 6... Vane plate made of porous sintered metal or resin material, 6c...・Chip side, 6d...Hub side.
Claims (1)
構成され、前記羽根板の全体あるいは一部を通気性のあ
る多孔質材で形成し、かつ、前記羽根板の多孔質材の開
孔率をハブ側からチップ側にかけて漸次小さくした軸流
送風機の羽根車。It is composed of a plurality of vanes and a hub to which the plurality of vanes are fixed, and the vane is entirely or partially made of a porous material with air permeability, and the porous material of the vane is An impeller for an axial blower whose pore size gradually decreases from the hub side to the tip side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14903289A JPH0315699A (en) | 1989-06-12 | 1989-06-12 | Impeller of axial blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14903289A JPH0315699A (en) | 1989-06-12 | 1989-06-12 | Impeller of axial blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0315699A true JPH0315699A (en) | 1991-01-24 |
Family
ID=15466177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14903289A Pending JPH0315699A (en) | 1989-06-12 | 1989-06-12 | Impeller of axial blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0315699A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04308398A (en) * | 1991-04-01 | 1992-10-30 | Matsushita Electric Ind Co Ltd | Impeller for air blower |
| US8075276B2 (en) * | 2008-10-28 | 2011-12-13 | Foxconn Technology Co., Ltd. | Impeller and cooling fan incorporating the same |
-
1989
- 1989-06-12 JP JP14903289A patent/JPH0315699A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04308398A (en) * | 1991-04-01 | 1992-10-30 | Matsushita Electric Ind Co Ltd | Impeller for air blower |
| US8075276B2 (en) * | 2008-10-28 | 2011-12-13 | Foxconn Technology Co., Ltd. | Impeller and cooling fan incorporating the same |
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