JPH0712096A - Large axial flow fan having small number of blades and manufacture thereof - Google Patents
Large axial flow fan having small number of blades and manufacture thereofInfo
- Publication number
- JPH0712096A JPH0712096A JP17743093A JP17743093A JPH0712096A JP H0712096 A JPH0712096 A JP H0712096A JP 17743093 A JP17743093 A JP 17743093A JP 17743093 A JP17743093 A JP 17743093A JP H0712096 A JPH0712096 A JP H0712096A
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- blade
- boss
- boss portion
- bolt insertion
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000003780 insertion Methods 0.000 claims abstract description 20
- 230000037431 insertion Effects 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 10
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000013585 weight reducing agent Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は舶用軸流送風機等に用い
られる大型少数翼の軸流扇及びその製造方法に関し、特
には鋳造による軸流扇のボス部と羽根部を分割して鋳造
し、各羽根部をボス部にボルトとナットで固着すること
により製造するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axial fan with a large number of small blades used in an axial blower for a ship and a method for manufacturing the same, and particularly to a boss portion and a blade portion of an axial fan produced by casting. It is manufactured by fixing each blade to the boss with bolts and nuts.
【０００２】[0002]
【従来の技術】自動車運搬船は自動車を積み込んで遠方
又は海外へ輸出するものであるが、車の搬入や搬出時に
おいて、船槽内の一酸化炭素濃度が一定値を超えると搬
入や搬出作業を中止しなければならない。そこで、搬入
や搬出の際、船槽内の一酸化炭素濃度を一定値以下に維
持するために、要所々々に換気扇を設けている。2. Description of the Related Art A car carrier is used to load cars and export them to a distant place or abroad. However, when loading and unloading cars, if the carbon monoxide concentration in the tank exceeds a certain value, the loading and unloading work will be carried out. I have to stop. Therefore, in order to keep the concentration of carbon monoxide in the tank at a certain value or less when carrying in or out, ventilation fans are provided in various places.
【０００３】この換気扇は、直径約２０００ｍｍ以上に
も及ぶ部大型舶用軸流送風機であって、図５及び図６に
示すように、筒体２１の軸心にモーター２２を固定して
その出力軸２３に軸流扇２４を連結して回転させ、出力
軸２３の軸方向へ送風する。従来、この軸流扇２４はア
ルミ合金など軽金属を鋳造して作成されるものであっ
て、ボス部２５と羽根部２６とが一体成形されている。This ventilating fan is an axial blower for a large ship having a diameter of about 2000 mm or more. As shown in FIGS. 5 and 6, a motor 22 is fixed to the axis of a tubular body 21 and its output shaft is fixed. The axial fan 24 is connected to the shaft 23 and is rotated to blow air in the axial direction of the output shaft 23. Conventionally, the axial fan 24 is made by casting a light metal such as an aluminum alloy, and the boss portion 25 and the blade portion 26 are integrally formed.
【０００４】なお、この種の大型軸流扇は、自動車運搬
船の他、ロールオン、オフコンテナ船、ビルの空調用や
工業用冷却塔等においても広く使用されている。A large-scale axial fan of this type is widely used in roll-on, off-container ships, building air-conditioners, industrial cooling towers, etc., as well as automobile carriers.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記従
来の大型軸流扇によれば、ボス部５と羽根部６が一体で
あるから、その鋳型を作成する高度の技術や設備が必要
であって、そのような設備等のない工場では簡単に作成
できない。また、鋳造の場合、湯の流れを良くするため
にはある程度の肉厚を必要とするほか、羽根部６とボス
部５の連結部分の強度を上げるために、当該部分を肉厚
としなければならないので、成形品の重量が増加する。However, according to the conventional large-scale axial fan described above, since the boss portion 5 and the blade portion 6 are integral with each other, a high-level technique and equipment for forming the mold are required. , It cannot be easily created in a factory without such equipment. Further, in the case of casting, in order to improve the flow of the molten metal, a certain thickness is required, and in order to increase the strength of the connecting portion of the blade portion 6 and the boss portion 5, the portion must be thick. Therefore, the weight of the molded product increases.
【０００６】また、軸流扇の羽根部の形状によっては騒
音が大きくなり、公害問題を生じさせることがあるの
で、羽根部の形状を前進翼にし、又は面積を大きくする
ことが望ましいので、現状にあっては流線形の３枚の羽
根部をボス部と一体成形しているから、砂型の作成もき
わめて高度の技術を要し、砂型が重くなり、取り扱いが
不便となる。Further, depending on the shape of the blades of the axial fan, noise may increase and may cause pollution problems. Therefore, it is desirable to make the shape of the blades forward blades or increase the area. In this case, since the three streamlined blades are integrally formed with the boss, the sand mold requires an extremely high technique, the sand mold becomes heavy, and the handling becomes inconvenient.
【０００７】そこで、本発明は、ボス部と羽根を分割し
て形成し、これらをボルトとナット等の簡単な連結部材
で連結する大型軸流扇及びその製造方法を提供する。Therefore, the present invention provides a large axial fan in which the boss portion and the blade are formed separately, and these are connected by a simple connecting member such as a bolt and a nut, and a manufacturing method thereof.
【０００８】[0008]
【課題を解決するための手段】本発明にかかる大型少数
翼の軸流扇の製造方法は、ボス部と羽根部とを有する軸
流扇において、ボス部と羽根部をそれぞれ別途に形成
し、ボス部の側壁に周方向へ所要間隔でボルト挿通孔を
穿設し、羽根部にボルトを埋め込み形成し、ボス部のボ
ルト挿通孔に羽根部のボルトを挿入してナットにて締め
付け固定することを特徴とする。According to the method of manufacturing an axial flow fan of large number of small blades according to the present invention, in an axial flow fan having a boss portion and a blade portion, the boss portion and the blade portion are separately formed, Bolt insertion holes should be drilled in the side wall of the boss at required intervals in the circumferential direction, the bolts should be embedded in the blades, and the bolts of the blades should be inserted into the bolt insertion holes of the boss and tightened with nuts. Is characterized by.
【０００９】また、本発明にかかる大型少数翼の軸流扇
は、周面にボルト挿通孔を穿設した有底筒形のボス部
と、前記ボス部の周面に密接可能な端面を有し、その端
面に前記ボルト挿通孔に挿入するボルトを埋め込み一体
成形した羽根部と、前記ボルト挿通孔を貫通したボルト
をボス部に締め付け固定するナットとからなることを特
徴とする。Further, the axial fan having a large number of small blades according to the present invention has a bottomed cylindrical boss portion having a bolt insertion hole formed in the peripheral surface, and an end surface which can be brought into close contact with the peripheral surface of the boss portion. The end portion of the bolt insertion hole is formed by embedding and integrally molding a bolt to be inserted into the bolt insertion hole, and a nut for tightening and fixing the bolt penetrating the bolt insertion hole to the boss portion.
【００１０】[0010]
【作用】上記構成の本発明によれば、ボス部と羽根部と
に分けて製造し、羽根部のボルトをボス部のボルト挿通
孔に挿入してナットで締め付け固定して軸流扇を得る。
したがって、砂型の作成が容易となり、軽量と小型化に
より砂型の取り扱いが簡便となる。よって、低騒音のた
めに要求される大型少数の巨大翼を持った軸流扇を簡単
に製造することができる。また、ボス部と羽根部との取
付角度を任意に変更できる。さらに一体鋳造時に要求さ
れる羽根部とボス部の連結部分の肉厚が不要となるた
め、羽根の基部を薄肉化することができ、従来例に比し
て５０％程度軽量化させることができる。According to the present invention having the above-mentioned structure, the boss and the blade are manufactured separately, and the bolt of the blade is inserted into the bolt insertion hole of the boss and tightened and fixed with the nut to obtain the axial fan. .
Therefore, the sand mold is easily created, and the sand mold is easy to handle due to its light weight and small size. Therefore, it is possible to easily manufacture an axial fan having a large number of large blades required for low noise. Further, the mounting angle between the boss portion and the blade portion can be arbitrarily changed. Further, since the thickness of the connecting portion between the blade portion and the boss portion which is required at the time of integral casting is unnecessary, the blade base portion can be made thinner, and the weight can be reduced by about 50% as compared with the conventional example. .
【００１１】[0011]
【実施例】以下に本発明にかかる大型少数翼の軸流扇及
びその製造方法の一実施例を図を参考にして説明する。
図１に示すように、軸流扇１はボス部２と３枚の羽根部
３とから構成され、ボス部２と羽根部３とはそれぞれボ
ルト４とナット５で連結されている。ボス部２は図２及
び図３に示すように、有底円筒体の軸心部に軸孔６及び
軽量化のための抜き孔７を有し、かつ、内側に周方向へ
均等配置された肉厚の羽根取付部８を有して全体が鋳造
成形されたものであって、側壁部には直交してボルト挿
通孔９が穿設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an axial fan having a large number of small blades and a method of manufacturing the same according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the axial fan 1 includes a boss portion 2 and three blade portions 3, and the boss portion 2 and the blade portions 3 are connected by bolts 4 and nuts 5, respectively. As shown in FIGS. 2 and 3, the boss portion 2 has a shaft hole 6 and a hole 7 for reducing the weight in the axial center portion of the bottomed cylindrical body, and is evenly arranged in the circumferential direction inside. The whole is cast-molded with a thick blade attachment portion 8, and a bolt insertion hole 9 is formed in the side wall portion at right angles.
【００１２】ボルト挿通孔９は鋳造成形後のボス部２に
穿孔機にて軸線方向に対して直角で、かつ、周方向に対
して適宜傾斜した配置で穿設される。ボス部２は鋳造用
鋳型で常道により鋳造されるが、製缶法にて作成された
ものでもよい。The bolt insertion hole 9 is formed in the boss portion 2 after casting by a punching machine at a right angle with respect to the axial direction and a proper inclination with respect to the circumferential direction. Although the boss portion 2 is cast by a casting mold on a regular road, it may be formed by a can manufacturing method.
【００１３】一方、羽根部３は流線形の形状をして鋳造
成形されたものであって、基部にボルト４が複数本にて
鋳込まれている。このボルト４は前記ボス部２のボルト
挿通孔９に対応して挿入できるように配設され、その一
端部はボス部２の周面に接触する前記基部としての円弧
状端部１０から突出し、他端部は凸凹からなるアンカー
部１１を有して地金（アルミ合金）に埋め込まれて固定
されている。ボルト４の本数は必要に応じて適宜決定さ
れる。On the other hand, the blade portion 3 has a streamlined shape and is cast, and a plurality of bolts 4 are cast into the base portion. The bolt 4 is arranged so that it can be inserted corresponding to the bolt insertion hole 9 of the boss portion 2, and one end of the bolt 4 projects from an arcuate end portion 10 serving as the base portion that contacts the peripheral surface of the boss portion 2, The other end has an anchor portion 11 formed of unevenness and is embedded and fixed in a metal (aluminum alloy). The number of bolts 4 is appropriately determined as needed.
【００１４】なお、ボルト４は地金に埋め込み固定して
抜けなくなるような頭部を有するものであればアンカー
部１１に変えられるから、頭部があればどのようなもの
でもよい。ボルト４を鋳込む羽根部３の鋳造用鋳型は所
謂インサート成形法などによって適宜作成される。The bolt 4 can be changed to the anchor portion 11 as long as it has a head that can be embedded and fixed in the metal to prevent it from coming off. Therefore, any bolt having a head can be used. The casting mold for the blade portion 3 into which the bolt 4 is cast is appropriately created by a so-called insert molding method or the like.
【００１５】羽根部３はその肉厚ｔがボルト４の直径に
対し極めて薄い場合には、図４に示すように、羽根部３
の肉厚ｔよりも大きな肉厚Ｔを設けた結合部１２を形成
し、その結合部１２の内部に埋め込むようにして強度を
向上させるのがよい。この結合部１２は、風切りを良好
にして抵抗を少なくするために、斜面部１３を形成する
などの適宜の流線形加工がなされる。When the wall thickness t of the blade portion 3 is extremely smaller than the diameter of the bolt 4, as shown in FIG.
It is preferable to form the joint 12 having a thickness T larger than the thickness t and to embed it inside the joint 12 to improve the strength. The connecting portion 12 is subjected to appropriate streamline processing such as forming the slope portion 13 in order to improve the air flow and reduce the resistance.
【００１６】そこで、上記のようなボス部２と羽根部３
の複数とを大量に鋳造生産しておき、必要に応じて、羽
根３のボルト４をボス部２のボルト挿通孔９に挿入し
て、適宜ワッシャー等を介在させてナット５にて締め付
け固定することにより、簡便に軸流扇を製造できる。Therefore, the boss portion 2 and the blade portion 3 as described above are used.
Are produced in large quantities by casting, and if necessary, the bolts 4 of the blades 3 are inserted into the bolt insertion holes 9 of the boss portion 2, and the nuts 5 are tightened and fixed by appropriately interposing a washer or the like. Thus, the axial fan can be easily manufactured.
【００１７】[0017]
【発明の効果】以上説明した本発明によれば、ボス部と
羽根部に分けて形成し、これをボルトとナットで連結し
て軸流扇を製造するものであるから、大型の軸流扇の製
造がきわめて簡便化され、鋳型の軽量化及び作成の簡便
化、コスト低下が図れる一方、一体鋳造時に要求される
羽根部とボス部の連結部分の肉厚が不要となるため、羽
根の基部を薄肉化することができ、従来例に比して５０
％程度軽量化させることができる。According to the present invention described above, the boss portion and the blade portion are formed separately, and the boss portion and the blade portion are connected to each other by the bolt and the nut to manufacture the axial flow fan. The manufacturing of the blade is extremely simplified, the weight of the mold is reduced, the production is simplified, and the cost is reduced, while the wall thickness of the connecting portion between the blade portion and the boss portion, which is required during integral casting, is unnecessary, so the blade base Can be made thinner, compared to the conventional example by 50
The weight can be reduced by about%.
【００１８】また、ボス部に対する羽根部の傾斜角度は
ボルト挿通孔の穿設位置を変更すれば容易に変更でき
る。Further, the inclination angle of the blade portion with respect to the boss portion can be easily changed by changing the drilling position of the bolt insertion hole.
【図１】本発明の一実施例を示す軸流扇の背面図。FIG. 1 is a rear view of an axial fan showing an embodiment of the present invention.
【図２】本発明にかかる軸流扇の製造工程を示す説明
図。FIG. 2 is an explanatory view showing a manufacturing process of an axial fan according to the present invention.
【図３】ボス部の断面側面図。FIG. 3 is a sectional side view of a boss portion.
【図４】羽根部とボルトの結合部を示す正面図。FIG. 4 is a front view showing a connecting portion between a blade portion and a bolt.
【図５】従来の軸流扇を示す正面図。FIG. 5 is a front view showing a conventional axial fan.
【図６】図５の半断面側面図。6 is a half sectional side view of FIG.
１…軸流扇 ２…ボス部 ３…羽根部 ４…ボルト ５…ナット ８…羽根取付部 ９…ボルト挿通孔 DESCRIPTION OF SYMBOLS 1 ... Axial fan 2 ... Boss part 3 ... Blade part 4 ... Bolt 5 ... Nut 8 ... Blade mounting part 9 ... Bolt insertion hole
Claims (3)
て、ボス部と羽根部をそれぞれ別途に形成し、ボス部の
側壁に周方向へ所要間隔でボルト挿通孔を穿設し、羽根
部にボルトを埋め込み形成し、ボス部のボルト挿通孔に
羽根部のボルトを挿入してナットにて締め付け固定する
ことを特徴とする大型少数翼の軸流扇の製造方法。1. An axial fan having a boss portion and a blade portion, wherein the boss portion and the blade portion are separately formed, and bolt insertion holes are formed in a sidewall of the boss portion at required intervals in a circumferential direction to form a blade. A method of manufacturing an axial fan with a large number of blades, characterized in that a bolt is embedded in the portion, the bolt of the blade portion is inserted into the bolt insertion hole of the boss portion, and the bolt is tightened and fixed with a nut.
のボス部と、前記ボス部の周面に密接可能な端面を有
し、その端面に前記ボルト挿通孔に挿入するボルトを埋
め込み一体成形した羽根部と、前記ボルト挿通孔を貫通
したボルトをボス部に締め付け固定するナットとからな
ることを特徴とする大型少数翼の軸流扇。2. A bolt having a bottomed cylindrical boss having a bolt insertion hole formed on its peripheral surface and an end face that can be brought into close contact with the peripheral surface of the boss portion, the end face being inserted into the bolt insertion hole. And a nut for tightening and fixing a bolt penetrating the bolt insertion hole to a boss portion.
成してなることを特徴とする請求項２に記載の大型少数
翼の軸流扇。3. The axial fan for a large number of small blades according to claim 2, wherein an anchor portion is formed at the embedded end portion of the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17743093A JPH0712096A (en) | 1993-06-23 | 1993-06-23 | Large axial flow fan having small number of blades and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17743093A JPH0712096A (en) | 1993-06-23 | 1993-06-23 | Large axial flow fan having small number of blades and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0712096A true JPH0712096A (en) | 1995-01-17 |
Family
ID=16030807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17743093A Pending JPH0712096A (en) | 1993-06-23 | 1993-06-23 | Large axial flow fan having small number of blades and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712096A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002227796A (en) * | 2001-02-02 | 2002-08-14 | Usui Internatl Ind Co Ltd | Installing structure of assembly type fan |
| WO2008107738A1 (en) | 2007-03-06 | 2008-09-12 | Tecsis Tecnologia E Sistemas Avançados Ltda | Fan blade connection |
| US7807256B2 (en) | 2007-01-30 | 2010-10-05 | Hewlett-Packard Development Company, L.P. | Toner receiving composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215768A (en) * | 1985-07-12 | 1987-01-24 | Matsushita Electric Ind Co Ltd | Manufacture of rused salt fuel battery |
| JPH04262099A (en) * | 1991-02-18 | 1992-09-17 | Mitsubishi Plastics Ind Ltd | Manufacture of fiber-reinforced plastic fan |
-
1993
- 1993-06-23 JP JP17743093A patent/JPH0712096A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215768A (en) * | 1985-07-12 | 1987-01-24 | Matsushita Electric Ind Co Ltd | Manufacture of rused salt fuel battery |
| JPH04262099A (en) * | 1991-02-18 | 1992-09-17 | Mitsubishi Plastics Ind Ltd | Manufacture of fiber-reinforced plastic fan |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002227796A (en) * | 2001-02-02 | 2002-08-14 | Usui Internatl Ind Co Ltd | Installing structure of assembly type fan |
| US7807256B2 (en) | 2007-01-30 | 2010-10-05 | Hewlett-Packard Development Company, L.P. | Toner receiving composition |
| WO2008107738A1 (en) | 2007-03-06 | 2008-09-12 | Tecsis Tecnologia E Sistemas Avançados Ltda | Fan blade connection |
| US8651816B2 (en) | 2007-03-06 | 2014-02-18 | Fantech Tecnologia Em Sistemas De Ventilacao Ltda | Fan blade connection |
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