Molochek – Steam turbine repair
The major task facing power plant personnel—ensuring the uninterrupted supply of electric and thermal energy to meet the constantly growing demands of the national economy—requires raising the technical standard of operations, reducing repair times, and extending the service intervals between repairs for power equipment.
Steam turbines are among the most complex types of modern power equipment; they operate under demanding conditions characterized by high rotational speeds, significant metal stresses, high steam pressures and temperatures, vibrations, and other specific factors. Operating conditions for turbine units have become significantly more complex due to the shift toward high steam parameters (100 atm, 510°C) and ultra-high parameters (170–255 atm, 550–585°C), as well as increased unit capacities (300, 500, and 800 MW); the continued development of thermal power plants in the USSR relies on the introduction of such units within power generating blocks.
Factors such as the use of specialized, high-quality alloy steels for cylinders, rotors, steam piping, valves, and fasteners—combined with significantly larger dimensions and the complex design of individual mechanisms, assemblies, and components (including main and auxiliary equipment, as well as protection and automation systems)—dictate specific technological approaches and impose rigorous requirements regarding the proper organization and high-quality execution of repairs for modern steam turbines.
These requirements have confronted maintenance personnel with a new set of challenges—issues they did not encounter when servicing steam turbine equipment designed for low and medium steam parameters. Today, personnel repairing power plant steam turbines must possess not only a solid understanding of turbine design and operation and the function of specific assemblies and components, but also the ability to correctly select and use metals and materials based on their intended application, properties, and operating conditions. Furthermore, they must be proficient in disassembly and assembly procedures; understand permissible tolerances for component dimensions, positions, and clearances; and be able to assess the extent and causes of wear, select appropriate restoration methods, and so forth.
This comprehensive body of knowledge is essential not only for properly organizing repairs and identifying and rectifying specific instances of wear, defects, and faults, but also for fully restoring the operational reliability of all components, assemblies, mechanisms, and the turbine unit as a whole—thereby ensuring a long interval between overhauls. …operation with high economic performance.
In writing the book *Steam Turbine Repair* (by Molochek), the author drew upon the extensive experience of power plants and energy-sector repair enterprises, as well as guidelines, instructions, and informational materials from regulatory and specialized organizations, personal experience, and various literature sources regarding specific repair technologies, all to ensure a systematic and comprehensive coverage of the organization and technology involved in repairing modern steam turbine equipment.
The content, layout, and presentation of material in previous editions of *Steam Turbine Repair* proved effective for comprehension and practical application during repairs; this conclusion is evident from published reviews and written feedback received by the author. Accordingly, the author has endeavored to preserve—wherever possible—the book’s structure, the scope of topics covered, and the accompanying illustrative material (figures, tables, and diagrams) that facilitates understanding of the described technological processes.
The book Molochek – Steam turbine repair is intended for engineers, technicians, foremen, and team leaders responsible for overseeing the repair and operation of steam turbine units at power plants. Naturally, a book like *Steam Turbine Repair*—which covers a wide range of topics and targets a broad audience—is not without its shortcomings and inaccuracies.
