Turbine Bearing and bearing bush Replacement?

Why do steam turbine Bearing need to be replaced?

First of all, we need to communicate with the user whether the steam turbine has been cut off oil, 

resulting in serious bearing wear. If it is, then the Journal Bearing must be worn and damaged, 

and the concentricity of the entire rotor has also changed. As the maintenance personnel, we will 

consider whether the front and rear steam seals are worn under such circumstances, and whether 

the amount of wear is large? If there are no these problems, the maintenance personnel just replace 

the new Bearing and bearing bush, and at the same time have to readjust the concentricity of the rotor. 

The maintenance personnel replace the bearing bushes individually, and then adjust the concentricity 

of the rotor, which takes about 2 weeks.

Here, we usually remind users according to the experience of operation and maintenance. 

Generally, the normal operation of the unit will wear out the bearing bushes after the oil is cut off and stop, 

and the user will replace the new bearing. According to normal procedures, in this case, the cylinder 

needs to be opened and overhauled. If it is running normally and the amount of wear is small, 

it is difficult for the operator to detect it. Only when the turbine vibration and bearing temperature 

have increased, the operator can detect it. This situation shows that the wear problem of the bearing 

bush has been large, and the concentricity of the entire rotor has also moved down, so the steam seal will 

also be completely worn. Therefore, according to the different situations of users, we need to carefully 

communicate with users and analyze the actual situation on site, so that users can make correct judgments 

and have a clearer understanding of the materials and maintenance process required for their own 

steam turbine maintenance.