日本機械学会論文集 C編
Online ISSN : 1884-8354
Print ISSN : 0387-5024
波形動圧気体ジャーナル軸受の動特性解析 : ヘリングボーン溝付き軸受との比較
古林 卓嗣
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ジャーナル フリー

2000 年 66 巻 641 号 p. 306-313

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A numerical study of self-acting gas-lubricated wave journal bearings is presented for their dynamic performances : HFW(self-excited half-frequency whirl)stability and dynamic response of an out-of-balance rotor. The study is conducted under practical operating conditions by means of a nonlinear orbit approach. Numerical examples of wave bearings are compared with those of herringbone-grooved bearings, and it is found that wave bearings give relatively favorable dynamic performances. Considering both HFW stability and dynamic stiffness, three-wave bearings are recommended for a practical use. However, it should be pointed out that HFW stability of wave bearings is quite sensitive to the wave amplitude, and also the synchronous orbit geometry of an unbalanced rotor supported on a wave bearing can be complicated out of plain circle.

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