Reconstruction of the friction units of turbine guide vanes

Conclusions

After the almost 2-yr operation of the gate apparatus since the start of reconstruction of friction units of the vanes, we can make a preliminary evaluation of the effectiveness of the works:

There is practically no leakage of water through the gate vanes to the turbine cover, which led to a complete unloading of the drainage pumps on the turbine cover and the efficiency of operating the gate apparatus increased considerably.

Repair of the gate apparatus is not required during maintenance.

There is no vibration of the gate vanes, since the gaps in the friction units of the journals of the gate vanes are minimum and stable.

The operating personnel objectively evaluate highly the work of the gate apparatus of the turbine after reconstruction and will continue this work on the remaining turbines.