著者
稲垣 耕 盆子原 康博 近藤 孝広 池 美慧 濵畑 貴之
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.84, no.862, pp.18-00004, 2018 (Released:2018-06-25)
参考文献数
4
被引用文献数
1

In household refrigerators, the rotational speed of a reciprocating compressor can be appropriately adjusted according to the temperature inside of the refrigerator. The lower rotational speed reduces the power consumption of the compressor. However, several natural frequencies of the compressor exist in the low rotation region, and besides, the unbalance force arising from the piston motion acts on the internal drive unit. Thereby the vibrations of the compressor are likely to be larger due to the resonance in the low rotation region. In this study, a method for supporting the drive unit inside the shell, which is called “the self-standing support” is newly proposed in order to reduce the vibration of the compressor drastically. In the proposed method, a spherical support element is utilized instead of coil springs to support the drive unit. And the drive unit can maintain a stable self-standing state by acting restoring moment due to the gravity while it is directly placed on the shell. The natural frequencies of the compressor can be greatly reduced by decreasing the support stiffness for the drive unit in comparison with the support method using coil springs. Furthermore, in designing the drive unit, the application point of the exciting force is matched with the center of percussion to the contact point on the spherical support. As a consequence, the periodic restraining force acting on the contact point can be minimized. By these two features, it is possible to considerably reduce the vibration transmission from the drive unit to the shell. In the present study, a simplified model for a reciprocating compressor is treated, and the effectiveness of the self-standing support is investigated analytically and experimentally.
著者
近藤 孝広 松崎 健一郎 宗和 伸行 盆子原 康博 佐々木 卓実
出版者
九州大学
雑誌
基盤研究(B)
巻号頁・発行日
2007

省エネ化・省資源化の実現に向けた限界設計の追求という最近の技術動向のもとで,設計段階における振動解析の必要性と重要性がより一層増大している.そのためには,より精密で実機に近い大規模自由度モデルに対する高精度の解析が不可欠である.そこで,拘束モードを利用する低次元化法を基盤として,システム内に不可避的に含まれる多種多様な非線形性をも考慮できる実用的な振動解析システムの開発を行った.