Single steam turbine key components and parts low-cycle fatigue service-life management system and management method

Abstract

The invention relates to a low-cycle fatigue life span management system for key components of a single steam turbine. The invention is characterized in that the management system comprises a low-cycle fatigue residual life span calculating / applying server and software, a data base server, an external system interface, a steam turbine data collecting system DAS and parameter measuring points, a web server and an user browser. The management method comprises inputting online monitoring data, inputting basic data about start and load change, calculating on line the low-cycle fatigue life span loss di of each component of the steam turbine, offering the advice for optimizing the operation for the single steam turbine, calculating the residual low-cycle fatigue life span of the key components of the single steam turbine according to order and recommending optimizing maintenance measures for the single steam turbine. The invention has the advantages of realizing the online management for the low-cycle fatigue life span about the key components of the single steam turbine and achieving the technical effect of utilizing one set of low-cycle fatigue life span management system to manage the low-cycle fatigue life span of the key components of the single steam turbine.

Description

technical field [0001] The invention relates to a low-cycle fatigue life management system and management method for key components of a single steam turbine, belonging to the technical field of steam turbines. Background technique [0002] The steam turbine rotor, cylinder and valve casing are the key components of the steam turbine. They are characterized by large size, high cost and long service life. Uneven distribution produces relatively large thermal stress, resulting in relatively large low-cycle fatigue life loss, improper operation and operation will shorten the service life of durable parts of the steam turbine, and improper maintenance measures will cause steam turbine accidents. In order to reasonably use the low cycle fatigue life of steam turbine components, we have applied for the invention patent "On-line Calculation and Control Method of Equivalent Stress of Steam Turbine High and Medium Pressure Rotor", the application number is 200610030244.X and "On-line...

AI Technical Summary

Problems solved by technology

Since a steam turbine has multiple components, such as rotors, cylinders, and valve casings, etc., low-cycle fatigue life management needs to be performed at the same time. Using the existing technology, one component of a steam turbine is equipped with a set of low-cycle fatigue life on-line management system. The low-cycle fatigue life management of multiple components of the steam turbine needs to be equipped with multiple sets of low-cycle fatigue life management systems, which requires high investment and is inconvenient to use and maintain

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