JPH03294699A - Impeller of blower - Google Patents

Impeller of blower

Info

Publication number
JPH03294699A
JPH03294699A JP2097132A JP9713290A JPH03294699A JP H03294699 A JPH03294699 A JP H03294699A JP 2097132 A JP2097132 A JP 2097132A JP 9713290 A JP9713290 A JP 9713290A JP H03294699 A JPH03294699 A JP H03294699A
Authority
JP
Japan
Prior art keywords
dimples
blade
vanes
low
impeller
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
Application number
JP2097132A
Other languages
Japanese (ja)
Inventor
Yoshiki Izumi
善樹 泉
Takashi Sugio
孝 杉尾
Shotaro Ito
正太郎 伊東
Kazuaki Yamamoto
一明 山本
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2097132A priority Critical patent/JPH03294699A/en
Publication of JPH03294699A publication Critical patent/JPH03294699A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/306—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the suction side of a rotor blade

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To reduce a pressure variation following an exfoliation of the airflow and to achieve a further lower noise by providing plural vanes around a hub, and arranging plural dimples of about a circular form on the lower pressure surface side of the vanes. CONSTITUTION:An impeller (a) has plural vanes (b) at the hub (f) of about a conical trapezoid form, and plural dimples (g) of about a circular form are provided on the lower pressure surface sides of the vanes (b). In this case, the typical size phi of the dimples (g) is made 1mm to 20mm, and the depth (h) is limited in the scope of 5% to 50% the thickness of the vanes. The phiand h of the dimples (g) may be arranged in the grid form, a zigzag form, or an irregular form. Consequently, an exfoliation of the airflow on the lower pressure surface sides of the vanes can be reduced, and a pressure variation following the exfoliation can be reduced. A lower noise effect lower than the conventional impeller is realized consequently.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は送風機の低騒音化技術に関する。[Detailed description of the invention] Industrial applications The present invention relates to a technique for reducing noise of a blower.

従来の技術 従来の送風機は例えば特開平１−９６４９８号公報に示
されるように第７図のような構造になってい九　すなわ
板　略円錐台形のハブｆの周囲に複数枚の羽根すを設け
ていた　送風機としてはこの羽根車ａを適当なケーシン
グに納へ　矢印の方向に回転させることにより送風作用
を起こしている。羽根車すは羽根車ボス部ｅにモーター
のシャフトを固定して回転するものである。−またこの
送風機の斜視図である第７図ａで、羽根すの反り線上の
切断面は第７図すのように単純な構造になってい九 発明が解決しようとする課題 しかし　上記の構成を有する送風機の構造（よ低騒音化
のために一層の改善が必要である。BACKGROUND ART A conventional blower has a structure as shown in FIG. 7, as shown in, for example, Japanese Unexamined Patent Publication No. 1-96498. As a blower, this impeller a is housed in a suitable casing and rotated in the direction of the arrow to generate the air blowing action. The impeller rotates with the motor shaft fixed to the impeller boss e. - Also, in Fig. 7a, which is a perspective view of this blower, the cut plane on the warp line of the blade has a simple structure as shown in Fig. 7. The structure of the blower (further improvement is required to reduce noise).

一般ζミ　送風機から発生する騒音の１つとして、羽根
の低圧面より流れが剥離を生し　剥離に伴い圧力変動を
発生することが考えられている。本発明（友　これを改
善し　低騒音化を達成しようとするものである。General ζmi One of the noises generated from blowers is thought to be the separation of the flow from the low-pressure surface of the blades, which causes pressure fluctuations. The present invention aims to improve this problem and achieve noise reduction.

課題を解決するための手段 上記問題点を解決するために本発明（よ　ハブの周囲に
複数枚の羽根を備え　前記羽根の低圧面側＆Ｑ　　複数
個の略円形状のディンプルを設けたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a plurality of blades around a hub, and a plurality of approximately circular dimples on the low pressure side of the blades. .

作用 上記手段による作用（よ　以下のとおりである。action The effects of the above means are as follows.

送風機の羽根の低圧面側に　複数個の略円形状的大きな
剥離を低減させる。そのことて　剥離に伴う圧力変動を
低減し　より一層の低騒音化を達成するものである。Reduces multiple large approximately circular flakes on the low-pressure side of the blower blade. This reduces pressure fluctuations associated with peeling and achieves even lower noise.

実施例 以下、本発明の実施例について図面を参考に説明する。Example Embodiments of the present invention will be described below with reference to the drawings.

ここで（戴　斜流送風機への適用を例にとって説明する
。Here, we will explain the application to a mixed flow blower as an example.

ま咀　第１図と第２図は　本発明の第１の実施例につい
て説明したものである。Figures 1 and 2 illustrate a first embodiment of the present invention.

第１図ａ　Ｉｔ　　送風機羽根車の斜視＠　第１図すは
羽根車の反り線での切断面図である。Fig. 1a It is a perspective view of the blower impeller @ Fig. 1 is a cross-sectional view of the impeller along the warp line.

羽根車ａ　１１　　略円錐台形のハブ部ｆに羽根すが備
えられている。そして、羽根すの低圧面側に複数個の略
円形状のディンプルｇが設けられている。Impeller a 11 A substantially truncated conical hub portion f is provided with blades. A plurality of approximately circular dimples g are provided on the low pressure side of the blade.

羽根車ボス部ｅにモーターシャフトを固定し　適切なケ
ーシングに納へ　モーターにより矢印の方ｄより流出し
ていく。Fix the motor shaft to the impeller boss part e and place it in an appropriate casing.The motor will flow out in the direction of the arrow d.

この時、ディンプルｇにより羽根の低圧面側すよりの流
れの剥離が減少し　その結果　剥離による圧力変動が低
減され　より一層の低騒音効果を有する。第２図に示し
たよう（ｌ：、φ３６０ｍｍの斜流羽根車（羽根枚数４
枚、オリフィス内径３７２ｍｍ）での風量と騒音の実験
データで（戴　約０．５ｄＢ低騒音となっている。また
　騒音スペクトラムで（よ　約２００Ｈ２〜約２５００
Ｈｚの広い周波数域で音圧レベルが低下している。At this time, the dimple g reduces flow separation on the low-pressure surface side of the blade, and as a result, pressure fluctuations due to separation are reduced, resulting in an even lower noise effect. As shown in Figure 2 (l:, φ360mm mixed flow impeller (number of blades: 4)
Experimental data on air volume and noise with an orifice inner diameter of 372 mm indicates a low noise level of about 0.5 dB.Also, the noise spectrum shows a range of about 200H2 to about 2500H2.
The sound pressure level has decreased in a wide frequency range of Hz.

第３図（よ　本発明の第２の技術的手段に関して説明し
たものである。FIG. 3 explains the second technical means of the present invention.

第３図でφは略円形状のディンプルｇの代表寸法（たと
えば円であれば直微　楕円であれば長軸の長さ）を示ｔ
、、ｈはディンプルｇの深さを示している。ここで、φ
は１ｍｍ〜２０ｍｍで、ｈは羽根の厚さ５％〜５０％の
範囲のディンプル寸法に限定する。これであれ（渋　第
１の実施例と同様に　羽根の低圧面側ｂ′よりの流れの
剥離を低減できて低騒音効果を有するに加わえ　羽根の
強胆衝撃に対する耐力にも問題は生じなし箋　　また　
製造上の自由度が広がり、生産性やコスト低減にも寄与
できる。In Fig. 3, φ indicates the representative dimension of the approximately circular dimple g (for example, the length of the direct fine if it is a circle, or the length of the major axis if it is an ellipse).
, , h indicates the depth of the dimple g. Here, φ
is 1 mm to 20 mm, and h is limited to a dimple size within a range of 5% to 50% of the thickness of the blade. In addition to reducing the separation of the flow from the low-pressure side b' of the blade and having a low noise effect (similar to the first embodiment), there is no problem with the blade's resistance to strong impact. Note again
It increases the degree of freedom in manufacturing and can also contribute to productivity and cost reduction.

第４図（よ　本発明の第３の技術的手段に関して説明し
た羽根車の平面図である。FIG. 4 is a plan view of the impeller described regarding the third technical means of the present invention.

すなわ板　ディンプルｇの代表寸法φと深さｈを前述の
第２の技術的手段に示した範囲の内で種々に異ならせて
、羽根の低圧面側ｂ′に不規則に配列したものである。In other words, the dimples g are irregularly arranged on the low-pressure surface side b' of the blade, with the representative dimensions φ and depth h of the dimples varied within the range shown in the second technical means mentioned above. be.

このよう置　ディンプルｇの寸法と配列の両方に不規則
性をもたせると、第１の実施例以上に羽根の低圧面側ｂ
′よりの剥離制御が可能となり、さらにより一層の低騒
音効果を有するものである。If irregularities are created in both the size and arrangement of the dimples g in this arrangement, the lower pressure side b of the blade will be larger than in the first embodiment.
This makes it possible to control peeling more than 100 cm, and has an even further low noise effect.

第５図ａ、ｂｌ；ｊ　　本発明の第４の技術的手段に関
して説明した羽根車の平面図である。Fig. 5a, bl;j is a plan view of the impeller described in relation to the fourth technical means of the present invention.

羽根の低圧面側ｂ’ｃＱ　　第２の技術的手段に記載し
たディンプルの寸法範囲の内で、同一寸法のディンプル
ｇを格子状に配列したもの（第４図ａ）と、チドリ状に
配列したもの（第４図ｂ）である。Low-pressure side b'cQ of the blade Within the dimple size range described in the second technical means, dimples g of the same size are arranged in a lattice pattern (Fig. 4a), and dimples arranged in a zigzag pattern are used. (Figure 4b).

このようなディンプルｇの形状と配列に於いても、第１
の実施例と同様番ヘ　　羽根の低圧面側ｂ゛よりの流れ
の剥離を防止できるに加わえ　配列が規則的であるため
製造が容易となり生産コストを低減できることになる。Even in such a shape and arrangement of dimples g, the first
In addition to being able to prevent separation of the flow from the low-pressure surface side b of the blade, the arrangement is regular, making it easy to manufacture and reducing production costs.

第６図は　本発明の第５の技術的手段に関して説明した
羽根車の平面図である。FIG. 6 is a plan view of the impeller described regarding the fifth technical means of the present invention.

これ（よ　羽根の低圧面側ｂ′へ　第２の技術的手段に
記載したディンプルの寸法範囲の内で、同一寸法のディ
ンプルｇを不規則に配列したものである。このようにデ
ィンプルｇの配列に不規則性をもたせると、第１の実施
例以上に羽根の低圧面側ｂ゛よりの流れの剥離制御が可
能となり、さらにより一層の低騒音効果を有するととも
へ　製造発明の効果 以上のように本発明の送風機羽根車であればハブの周囲
に複数枚の羽根を備え　羽根の低圧面側に　複数個の略
円形状のディンプルを設けること六　羽根車が送風作用
をしている時に生じる羽根の低圧面での流れの剥離を低
減できる。このこ七により、剥離に伴なう圧力変動を低
減でき、従来よりも低騒音効果を有する。This (toward the low pressure side b' of the blade) dimples g of the same size are arranged irregularly within the dimple size range described in the second technical means. By creating irregularities in the blade, it is possible to control the separation of the flow from the low-pressure side b of the blade more than in the first embodiment, and to have an even more low noise effect, which is even more effective than the manufacturing invention. Thus, the blower impeller of the present invention has a plurality of blades around the hub, and a plurality of approximately circular dimples are provided on the low-pressure side of the blade. Separation of flow on the low-pressure surface of the blade can be reduced.This reduces pressure fluctuations caused by separation, resulting in a lower noise effect than in the past.

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

第１図（−ａ）は本発明の第一の実施例の送風機羽根車
の斜視医　第１図（、ｂ）は本発明の第１の実施例の送
風機羽根車の羽根の反り線での断面図　第２図は同経音
特性＠、第３図は本発明の第２の実施例で、ディンプル
の断面図　第４図は本発明の第３平面医　第６図は本発
明の第５の実施例の送風機羽根車の要部平面は　第７図
（ａｊは従来の送風機羽根車の斜視は　第７図（ｂ）は
従来の送風機羽根車の羽根の反り線での断面図である。 ａ・・・・羽根取　ｂ・・・・羽楓　Ｃ・・・・前縁　
ｄ・・・・復ｔｉｅ・・・・羽根車ボス餓　ｆ・・・・
ハブＫｇ・・・・ディング／ｋ　　ｂ”　・・・・羽根
の低圧面（ＫＬ　　ｂ”・・・・羽根の高圧面倶Ｌ　φ
・・・・代表寸？＆　　ｈ・・・・深さ。FIG. 1(-a) is a perspective view of the blower impeller according to the first embodiment of the present invention. FIG. 1(-b) is a perspective view of the blower impeller according to the first embodiment of the present invention. Cross-sectional view Figure 2 shows the same transsonal characteristic@, Figure 3 shows the second embodiment of the present invention, Figure 4 shows the third flat surface of the present invention, Figure 6 shows the fifth embodiment of the present invention. The principal parts of the blower impeller according to the embodiment are shown in FIG. a... Feather handle b... Feather maple C... Leading edge
d... Revenge... Impeller boss starvation f...
Hub Kg...Ding/k b"...Low pressure surface of the blade (KL b"...High pressure surface of the blade L φ
...Representative size? & h...depth.

Claims (5)

【特許請求の範囲】[Claims] （１）ハブの周囲に複数枚の羽根を備え、前記羽根の低
圧面側に、複数個の略円形状のディンプルを所定密度で
設けた送風機羽根車。(1) A blower impeller including a plurality of blades around a hub, and a plurality of approximately circular dimples provided at a predetermined density on the low-pressure side of the blades. （２）羽根の低圧面側に設けられた略円形状のディンプ
ルの代表寸法が１ｍｍ〜２０ｍｍまでで前記ディンプル
の深さが羽根の厚さの５％〜５０％までの形状のディン
プルを有する請求項１記載の送風機羽根車。(2) A claim in which the approximately circular dimple provided on the low-pressure surface side of the blade has a typical dimension of 1 mm to 20 mm, and the depth of the dimple has a shape of 5% to 50% of the thickness of the blade. The blower impeller according to item 1. （３）ディンプルの代表寸法と深さを種々に異ならせて
、それらの種々の寸法のディンプルを不規則に前記羽根
の低圧面側に配列した請求項１記載の送風機羽根車。(3) The blower impeller according to claim 1, wherein the representative dimensions and depths of the dimples are varied and the dimples of various dimensions are irregularly arranged on the low pressure surface side of the blade. （４）同一寸法のディンプルを羽根の低圧面側に、格子
状あるいはチドリ状に配列させた請求項２記載の送風機
羽根車。(4) The blower impeller according to claim 2, wherein dimples of the same size are arranged on the low-pressure side of the blade in a lattice or zigzag pattern. （５）同一寸法の前記ディンプルを前記羽根の低圧面側
に、不規則に配列させた請求項２記載の送風機羽根車。(5) The blower impeller according to claim 2, wherein the dimples of the same size are arranged irregularly on the low pressure side of the blade.
JP2097132A 1990-04-12 1990-04-12 Impeller of blower Pending JPH03294699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2097132A JPH03294699A (en) 1990-04-12 1990-04-12 Impeller of blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2097132A JPH03294699A (en) 1990-04-12 1990-04-12 Impeller of blower

Publications (1)

Publication Number Publication Date
JPH03294699A true JPH03294699A (en) 1991-12-25

Family

ID=14184043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2097132A Pending JPH03294699A (en) 1990-04-12 1990-04-12 Impeller of blower

Country Status (1)

Country Link
JP (1) JPH03294699A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05332294A (en) * 1992-05-29 1993-12-14 Daikin Ind Ltd Axial fan
JPH06159297A (en) * 1992-11-25 1994-06-07 Daikin Ind Ltd Blower mechanism
WO2006078083A2 (en) * 2005-01-24 2006-07-27 Lg Electronics Inc. Air conditioner
KR100794644B1 (en) * 2005-11-01 2008-01-14 엘지전자 주식회사 Air Conditioner
WO2008099854A1 (en) * 2007-02-13 2008-08-21 Daikin Industries, Ltd. Impeller for fan
JP2008223760A (en) * 2007-02-13 2008-09-25 Daikin Ind Ltd Impeller for blower
US8231331B2 (en) 2008-03-14 2012-07-31 Wayne State University Reduction of flow-induced noise in a centrifugal blower
WO2019030868A1 (en) 2017-08-09 2019-02-14 三菱電機株式会社 Propeller fan, blower device, and refrigeration cycle device
US10539157B2 (en) 2015-04-08 2020-01-21 Horton, Inc. Fan blade surface features
TWI800358B (en) * 2022-04-25 2023-04-21 建準電機工業股份有限公司 Impeller and cooling fan including the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035199A (en) * 1983-08-04 1985-02-22 Matsushita Electric Ind Co Ltd Impeller of blower
JPS6365900B2 (en) * 1980-04-16 1988-12-19 Bendix Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6365900B2 (en) * 1980-04-16 1988-12-19 Bendix Corp
JPS6035199A (en) * 1983-08-04 1985-02-22 Matsushita Electric Ind Co Ltd Impeller of blower

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05332294A (en) * 1992-05-29 1993-12-14 Daikin Ind Ltd Axial fan
JPH06159297A (en) * 1992-11-25 1994-06-07 Daikin Ind Ltd Blower mechanism
WO2006078083A2 (en) * 2005-01-24 2006-07-27 Lg Electronics Inc. Air conditioner
WO2006078083A3 (en) * 2005-01-24 2007-03-08 Lg Electronics Inc Air conditioner
KR100794644B1 (en) * 2005-11-01 2008-01-14 엘지전자 주식회사 Air Conditioner
JP2008223760A (en) * 2007-02-13 2008-09-25 Daikin Ind Ltd Impeller for blower
WO2008099854A1 (en) * 2007-02-13 2008-08-21 Daikin Industries, Ltd. Impeller for fan
US8231331B2 (en) 2008-03-14 2012-07-31 Wayne State University Reduction of flow-induced noise in a centrifugal blower
US10539157B2 (en) 2015-04-08 2020-01-21 Horton, Inc. Fan blade surface features
US10662975B2 (en) 2015-04-08 2020-05-26 Horton, Inc. Fan blade surface features
WO2019030868A1 (en) 2017-08-09 2019-02-14 三菱電機株式会社 Propeller fan, blower device, and refrigeration cycle device
EP3916240A1 (en) 2017-08-09 2021-12-01 Mitsubishi Electric Corporation Air-sending device, and refrigeration cycle device
US11434924B2 (en) 2017-08-09 2022-09-06 Mitsubishi Electric Corporation Propeller fan, air-sending device, and refrigeration cycle device
US11788547B2 (en) 2017-08-09 2023-10-17 Mitsubishi Electric Corporation Propeller fan, air-sending device, and refrigeration cycle device
TWI800358B (en) * 2022-04-25 2023-04-21 建準電機工業股份有限公司 Impeller and cooling fan including the same

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