长湖水电厂二号发电机(型式:TS725/106—40)经过长期远行,上导轴瓦单边间隙由15道增至65道,转轴振动加剧,经实测上导转轴摆度最大值达100—110道。虽然轴瓦松动对振动的传递有消减作用,但发电机的振动仍然有明显增大现象,正常运行时的上支架振动为8道,后来增至15道。有关厂、所对这台发电机进行了振动测量试验,从变速试验发现,这台发电机存在着一个频率等于机组转速频率,振幅跟转速平方成正比,方向为径向的振动源; Long Lake hydropower station on the 2nd generator (type: TS725 / 106-40) after long-term travel, the upper bearing bush unilateral clearance increased from 15 to 65, the shaft vibration worsened by the measured maximum value of the slewing shaft up to 100 -110 Road. Although bearing bush loosening reduces the transmission of vibration, the vibration of generator still increases obviously. The vibration of upper support during normal operation is 8 and then increased to 15. According to the test of variable speed test, this generator has a vibration source whose frequency is equal to the speed of the generator set and whose amplitude is proportional to the square of the speed and whose direction is radial.