水泵轴连轴承失效形式主要为：心轴断裂，心轴滚动表面、外圈沟(滚)道表面、滚动体表面的磨损和疲劳剥落及密封失效。

Main failure modes of automobile water pump bearings are: breakage of shaft, wear and fatigue flaking of rolling contact surfaces.

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所述轴固联于轮体，等分排列于齿道上，套于轴的轴承或轴套的外径与齿道等 宽。

The shaft is fixed to the wheel body and arranged uniformly on the tooth path, and the outside diameter of the bearing or the shaft sleeve jacketed on the shaft is as wide as the tooth path.

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