Directing against the general-character problems existing on supercritical 600 MW units manufactured by Harbin Turbine Works

such as unstable vibration of LP bearing brackets

un-balance vibration of the LP rotors

sudden change of LP rotor vibration

unstable vibration fo generator's bearing bracket

as well as un-balance of slip-ring's small shaft etc.

and combining with partial practical cases in other power plants

including analysis and disposal process for troubles occurred on some units in Hegang Power Plant

Taicang Power Plant

Qinbei Power Plant

Luohuang Power Plant

Shantou Power Plant

Yimin Power Plant

Chaohu Power Plant

and Yangcheng Power Plant etc.

some solution measures have been put forward as follows:for unstable vibration of LP bearing bracket and un-balance vibration of LP rotors

the expansion of LP cylinder can be made to reach a designated level

so as to solve the problem by using the high-speed dynamic balancing method;for unstable vibration of generator's bearing bracket

the problem can be solved by using the optimization of structure;for un-balance vibration of slip-ring's small shaft

the problem can be solved by using high-speed dynamic balancing.