Backwards Fan - Ushiromuki Fan

Japanese: 後向きファン - うしろむきふぁん
Backwards Fan - Ushiromuki Fan

...The gas volume handled is up to about 21,000 m3/min. It has the second highest boosting capacity after the multi-blade fan, and although its efficiency is slightly lower than the backward-curved fan described below, its structure allows it to be made small and lightweight, and it is widely used for boiler induction, dust collection equipment, and for pumping powders and small objects. (c) Backward-curved fan Also called a turbofan, it has an impeller with 12 to 24 blades arranged on the main and side plates (Figure 1-c). ...

*Some of the terminology that refers to "rear-facing fans" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…取扱いガス量は2万1000m3/min程度まである。多翼ファンに次いで昇圧能力があり,効率は次に説明する後向きファンよりやや劣るが,構造上,小型・軽量にすることができ,ボイラーの誘引用や集塵装置用,粉末・微小物の圧送用などに広く使用されている。(c)後向きファン ターボファンとも呼ばれ,主板,側板に12~24枚の羽根が配列された羽根車をもつ(図1‐c)。…

※「後向きファン」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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