Operating state of turbine-generator units of small hydrostations according to results of vibration studies

Conclusions

• 1. Small hydrostations under high-mountain conditions should operate with trash racks, devices should be provided for their cleaning from trash and shuga, as well as shuga-deflectors into the diversion canal.

• 2. To reduce abrasion of the turbine equipment, it is necessary to provide operation of the suspended-particle settling basins.

• 3. Specifications on the assembly of bearings and movable couplings should be developed for conducting maintenance works.

• 4. During restoration works the profile of the runner blades should be made strictly according to the template in conformity with the plant drawings.

• 5. Extremely necessary is the equipping of hydrostation with means for monitoring the technial parameters (bearing temperature, water pressure in the passage, wobble of the shafting, etc.), observation of the changes in which will make it possible to carry out in good time preventive maintenance and to reduce the probability of occurrence of breakdown.