Steam turbine bearing sharply melts or damage to the cause

Causes 2020 - turbine bearing sharply melt or damaged 10 - 04 ( 1) The cause of the accident 1, due to water hammer or unit load, bearing damage caused. 2, oil bearing is broken. 3, strong vibration unit. Due to the strong vibration unit, can make the oil film bearing damage caused by the diameter of axle and sharply grinding damage, also may make the bearing shell in vibration displacement, the four work properly or damage. 4, bearing defects in itself. In busbar processing manufacturing process, sharply poor casting quality, such as casting sharply before the tire cleaning not net, no hang hang or tin tin is not in conformity with the quality requirements, in has sharply changed or sharply cracking occurred in the operation of the bearings and other issues. 5 there are mechanical impurities in the midst, lubricating oil, damage sharply, lead to bearing damage. 6, oil temperature control is undeserved, cause the formation and stability of oil film bearing, will result in bearing damage of sharply. （ 2) Accident symbol 1, bearing return oil temperature over 75 ℃ or sudden continuous rise to 70 ℃. 2, the spindle watts sharply temperature over 85 ℃, thrust tile sharply temperature over 95 ℃. 3, back to the oil temperature rise and the bearing inner smoke. 4, lubricating oil pressure drop below operating procedures permitted, oil system of the oil or lubricating oil pump cannot be put into operation. 5, the vibration increases. （ 3) Accident treatment method is found in the unit operation proved that bush has an exception occurs or damage to the above phenomenon, should immediately brake downtime, inspection of damage and repair measures to repair. （ Source: green turbine)