Increase of resource of steam turbine
DOI:
https://doi.org/10.15587/1729-4061.2013.12422Keywords:
Steam turbine, thermal stresses state, creep and long-term durability, low-cycle fatigueAbstract
A significant part of heat-mechanic equipment has already developed standard and extended resources. The scheduled repairs are reduced and overhaul periods are increased. Operation of power units in peak load with a large number of start-stops leads to their rapid wear and cracking in high temperature zones of elements of turbo-installations. Cracks in the rotors cause the possibility of further emergency operation. The economic situation at present cannot provide new equipment. There is a need to develop measures to increase the resource of a steam turbine.
The following measures are suggested to increase the resource of the steam turbine: change of operative conditions; preliminary heating of the rotor; removal of the damaged metal layer; change of the thermal circuit; reconstruction of thermal groovesReferences
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