A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Protection of elements of the water passage of turbines from hydroabrasive wear
Conclusions The hydroabrasive resistance of structural steels does not provide the necessary reliability of turbines operating on sediment-transporting rivers.Case-hardening of structural steels and resistant protective coating are used for increasing the reliability and life of parts of the flow passage.During actual service the effectiveness of casehardening decreases by half compared with laboratory tests, which is explained by the insufficient thickness of the protective layer. It is not advisable to use this type of surface protection for turbines with a high intensity of hydroabrasive action, since it is impossible to restore the protective layer under hydrostation conditions.Two types of protective coatings have the highest priority: protective electrode hard surfacing on a cobalt base, for instance, TsN-2, which while providing a high wear resistance of the surface, E greater than 3, permits making a protective layer of the required thickness 3–5 mm and repairing the flow part of the turbine directly at the hydrostation; synthetic polyurethane-based compositions making it possible to completely cover the runners with a coating thickness of 1.5–2 mm. Destroyed polyurethane coatings can be restored directly at the hydrostation.
Protection of elements of the water passage of turbines from hydroabrasive wear
Conclusions The hydroabrasive resistance of structural steels does not provide the necessary reliability of turbines operating on sediment-transporting rivers.Case-hardening of structural steels and resistant protective coating are used for increasing the reliability and life of parts of the flow passage.During actual service the effectiveness of casehardening decreases by half compared with laboratory tests, which is explained by the insufficient thickness of the protective layer. It is not advisable to use this type of surface protection for turbines with a high intensity of hydroabrasive action, since it is impossible to restore the protective layer under hydrostation conditions.Two types of protective coatings have the highest priority: protective electrode hard surfacing on a cobalt base, for instance, TsN-2, which while providing a high wear resistance of the surface, E greater than 3, permits making a protective layer of the required thickness 3–5 mm and repairing the flow part of the turbine directly at the hydrostation; synthetic polyurethane-based compositions making it possible to completely cover the runners with a coating thickness of 1.5–2 mm. Destroyed polyurethane coatings can be restored directly at the hydrostation.
Protection of elements of the water passage of turbines from hydroabrasive wear
Brilov, E. P. (author) / Shpolyanskaya, É. N. (author)
1997
Article (Journal)
English
BKL:
56.30
Wasserbau
Local classification TIB:
770/6550/8000
Protection of elements of the water passage of turbines from hydroabrasive wear
| Springer Verlag | 1997
Protection of Elements of the Water Passage of Turbines from Hydroabrasive Wear
| British Library Online Contents | 1997
Hydroabrasive wear behaviour and damage mechanisms of different hard coatings
| British Library Online Contents | 1999
An apparatus that analyzes the hydroabrasive wear of fiberglass pipes
| British Library Online Contents | 2017
Principles of hydroabrasive and impact-abrasive wear of hard-facing materials. Part 2
| British Library Online Contents | 1991