作者通过大量试验证明了水力机械中鱼鳞状表面破坏不是泥砂磨损的特征,而是含砂水中汽蚀破坏的一种特征,证明了单纯泥砂磨损是越冲磨越光滑,而且是较为缓慢的。因此得出了消灭或减轻汽蚀是对待这类问题的首要措施,还结合国外的研究,总结出了含砂水中汽蚀和磨损的规律。按照这种规律已使得六郎洞等水电站水轮机快速破坏问题得到了较为满意的结果。 Through a large number of tests, the author proves that the damage to the scaly surface of hydraulic machinery is not a characteristic of sand abrasion, but a characteristic of cavitation erosion in sandy water, which proves that pure sand abrasion is smoother and more sluggish. Therefore, it is concluded that the primary measure to eliminate or reduce cavitation is to deal with such problems, and the law of cavitation and wear in sand-containing water is also summarized. According to this law, the problem of rapid destruction of hydraulic turbine of Liulongdong hydropower station has been satisfied.