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Steam turbine blade online damage state assessment system and steam turbine blade life assessment method

A technology for steam turbine blade and condition evaluation, which is applied in the direction of machine/engine, mechanical equipment, engine function, etc., can solve the high-cycle fatigue of high-temperature blades, low-cycle fatigue and low-temperature blade water erosion, fouling and wear evaluation, and blade online life evaluation. Inaccuracy and other problems, to avoid time and economic losses

Active Publication Date: 2021-05-07
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of inaccurate blade online life evaluation in the monitoring and evaluation of the operating state of the steam turbine, and the inability to evaluate the high-cycle fatigue and low-cycle fatigue of the high-temperature blade in real time, and the water erosion, scaling and wear of the low-temperature blade. An online damage state assessment system for steam turbine blades and a life assessment method for steam turbine blades

Method used

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  • Steam turbine blade online damage state assessment system and steam turbine blade life assessment method
  • Steam turbine blade online damage state assessment system and steam turbine blade life assessment method
  • Steam turbine blade online damage state assessment system and steam turbine blade life assessment method

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specific Embodiment approach 1

[0046] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the steam turbine blade online damage state evaluation system described in this embodiment,

[0047] The system includes a monitoring data conversion module (1), a high-cycle fatigue loss calculation module (3), a low-cycle fatigue loss calculation module (4), a water erosion damage calculation module (5), and a blade throat area calculation module (6 ), fatigue assessment module (7), water erosion damage assessment module (8) and fouling and wear damage assessment module (9);

[0048] The monitoring data conversion module (1) is used to receive the real-time parameter signal of the steam turbine blade monitored by the power plant, perform analog-to-digital conversion on the real-time parameter signal of the steam turbine blade, and send the real-time parameter signal of the steam turbine blade in digital form to the high-cycle fatigue loss calculation module (3), low cycle f...

specific Embodiment approach 2

[0058] Specific implementation mode two: the following combination figure 2 Describe this embodiment, this embodiment will further explain the steam turbine blade online damage state assessment system described in Embodiment 1, the system also includes a data storage module (2), and the data storage module (2) is used to receive and monitor The data conversion module (1) sends real-time parameter signals of steam turbine blades in digital form, and stores the received signals.

specific Embodiment approach 3

[0059] Specific embodiment three: this embodiment further explains the online damage state assessment system for steam turbine blades described in embodiment one, the system also includes a display processing module (10), and the display processing module (10) is used to receive fatigue evaluation The blade total fatigue loss signal of module (7) compares the received blade total fatigue loss with the steam turbine blade design fatigue loss threshold, when the blade total fatigue loss is greater than the steam turbine blade design fatigue loss threshold, Send fatigue warning signal, and display the warning signal and fatigue loss information;

[0060] It is also used for receiving mild, moderate or severe water erosion alarm signals sent by the water erosion damage assessment module (8), and displaying the received water erosion alarm signals;

[0061] It is also used to receive the steam turbine blade scaling alarm signal sent by the scaling and wear damage evaluation module ...

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Abstract

The invention provides a steam turbine blade online damage state evaluation system and a steam turbine blade life evaluation method, which belong to the technical field of steam turbine operation state monitoring and blade life evaluation. The invention solves the problem of inaccurate blade online life evaluation in the monitoring and evaluation of the operating state of the steam turbine, and the inability to evaluate high-cycle fatigue and low-cycle fatigue of high-temperature blades and water erosion, scaling and wear of low-temperature blades in real time. The present invention utilizes the temperature signal, pressure signal and load signal of each blade of the steam turbine collected by the power plant, and develops a life evaluation module around the operating status of the blades at all levels of the steam turbine, and obtains the high and low cycle fatigue loss of the steam turbine blade and the depth of the water erosion pit through program calculation respectively. It can monitor the damage degree of the blade online in real time, and obtain the damage status of the blade during operation in time. The invention is suitable for life evaluation of steam turbine blades.

Description

technical field [0001] The invention belongs to the technical field of steam turbine operation state monitoring and blade life evaluation. Background technique [0002] Steam turbine is one of the core equipment of thermal power and nuclear power enterprises, and its operation status directly affects the economic benefits of the entire enterprise. Many enterprises at home and abroad attach great importance to the condition monitoring technology of steam turbines, but for a long time, the safety assessment of steam turbines has been based on the rotor system, and the safety assessment of blades has not paid much attention. In foreign countries, a small number of power stations have been equipped with advanced performance monitoring and measurement software systems, which have improved the power station performance and system configuration capabilities. However, in China, there are few related articles and engineering products on steam turbine blade fatigue and blade water er...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/14
CPCF01D21/14F05D2260/80F05D2260/81F05D2260/82
Inventor 张宏涛刘云锋李宇峰关淳马义良张宇朱晓明王健盛显伟张迪刘剑武芏茳
Owner HARBIN TURBINE
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