著者

細谷 浩之 谷 直記

出版者

紙パルプ技術協会

雑誌

紙パ技協誌 (ISSN:0022815X)

巻号頁・発行日

vol.60, no.6, pp.900-903, 2006-06-01

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韓国の会社である,ケイターボ社は高効率のターボブロワ(TB)シリーズを開発した。TBシリーズは半永久的なエアーフォイルベアリングと高效率高速モータを適用し,ルーツブロワに比べて30%以上のエネルギー節約及びメンテナンスの削減で長寿命のターボブロワである。機械的な摩擦が無いことと低騒音の構造にすることにより,低騒音75dBと画期的に減少し,速回転するので重さと設置面積を大幅に削減できた。振動がないので防振工事の必要がない。<BR>汚排水処理曝気用,セメント工場の搬送システム,製紙工場,纖維工場などProcess Airの供給装置として使用できる。また遠隔操作も可能であり,お客様の幅広いニーズに対応できる。

著者

永代 行日出 細谷 浩之 中野 貴裕

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.855, pp.17-00310-17-00310, 2017 (Released:2017-11-25)

参考文献数

23

被引用文献数

1

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Acoustic metamaterial can have arbitrary acoustic characteristics , and there is possibility to improve acoustic performance of any products dramatically. As metamaterial, many kind of types have been propounded and studied. It is mainly classified into resonance type and non-resonance type.Resonance type metamaterial can change acousic characteristics drastically, but frequency range is narrow. Non-resonance type’s acoustic characteristics range is less than resonance type, but it can be changed in broad frequency band. It is a great advantage to use. About non-resonance type metamaterial, it has been already studied to control transmitted sound, but it has not been studied about reflection sound. If reflection sound control become possible, effective method can be chosen to solve noise problem. For example, resonance frequency in a duct will be shifted by changing reflection direction from the wall. In this study, the design method of non-resonance type metamaterial to control reflection sound has been studied by using FEM and Transfer-function method, and to verify the design method, element test was conducted. Element test result correspond well with analysis result, and the design method of acoustic metamaterial has been verified in this study. In order to put into practical use, further study with actual product shape is needed to confirm manufacturability.