The reliability of bulb turbine is low because of its structure and its working seal of main shaft is easy to happen accident.It is very important for the safe operation of the station to enhance the reliability of the working seal of main shaft.This paper
based on the analysis of the structure characteristics
the existed problems of working seal of main shaft of the Shuangling hydropower station
puts forward some improvement measures.The practice showed that it gained good effectiveness.These will provide some reference experience for the design
manufacturing
operation and check of the bulb hydro-generating unit in future.