| 摘要 |
To achieve an efficacy of allowing a shaft to spin in high speed without contacting the bearing in which the shaft is seated, a bearing is configured to comprise an inner ring which includes: at least two slant arc surface zones each spaced out from the surface of the shaft with a gap shrinking, in the spinning direction of the shaft, to a thickness approximately equal to a preset minimum value. The bearing may also be configured to further comprise at least two circular arc surface zones each spaced out from the surface of the shaft with a gap having a thickness approximately equal to the preset minimum value, each of the circular arc surface zones being seated between two of the slant arc surface zones, whereby the liquid substance in the gap between the shaft and the inner ring of the bearing is expelled, when the shaft is spinning, to flow through the gap of smaller thickness or the part of the gap which is between the shaft and the circular arc surface zones, thereby the shaft doesn't have to contact the bearing when it spins with high speed.
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