Turbine blade on-line damage state evaluating system and turbine blade service life evaluating method

A technology for evaluating the state of steam turbine blades, applied to machines/engines, mechanical equipment, engine components, etc., can solve the problems of high-cycle fatigue and low-cycle fatigue of high-temperature blades, water erosion, scaling and wear evaluation of low-temperature blades, and on-line life evaluation of blades Inaccurate and other issues, to avoid time and economic loss

Active Publication Date: 2019-02-22
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-cy...

Method used

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  • Turbine blade on-line damage state evaluating system and turbine blade service life evaluating method
  • Turbine blade on-line damage state evaluating system and turbine blade service life evaluating method
  • Turbine blade on-line damage state evaluating system and turbine blade service life evaluating 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 relates to a turbine blade on-line damage state evaluating system and a turbine blade service life evaluating method, and belongs to the technical field of turbine operation state monitoring and blade service life evaluation. According to the turbine blade on-line damage state evaluating system and the turbine blade service life evaluating method, the problems that blade on-line service life evaluation is not accurate when the operation state of a turbine is monitored and evaluated, and high-cycle fatigue and low-cycle fatigue of high-temperature blades, and water erosion, scaling and abrasion of low-temperature blades cannot be evaluated in real time; temperature signals, pressure signals and load signals of each blade of the turbine collected by a power plant are utilized,a service life evaluation module is developed based on the operation state of the blades of each stage of the turbine, high-and-low-cycle fatigue loss amount, water erosion pit depth, scaling amountand abrasion amount of the turbine blades are obtained through program calculation correspondingly, and the damage degree of the blades can be monitored on line in real time so as to timely obtain thedamage state of the blades in the operation process; and the system and the method are suitable for evaluating the service life of the 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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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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