Online evaluation of calendar lifespan of steam turbine high-temperature durable parts and prediction method

A technology of steam turbine and life, applied in the field of steam turbine, to achieve the effect of online prediction and rational use

Active Publication Date: 2007-02-07
SHANGHAI POWER EQUIP RES INST
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Problems solved by technology

However, online evaluation or prediction of the calendar life of high-temperature durable parts of steam tu

Method used

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  • Online evaluation of calendar lifespan of steam turbine high-temperature durable parts and prediction method
  • Online evaluation of calendar lifespan of steam turbine high-temperature durable parts and prediction method
  • Online evaluation of calendar lifespan of steam turbine high-temperature durable parts and prediction method

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[0044] Example

[0045] For the high-pressure rotor of a supercritical 600MW steam turbine with a certain type of main steam temperature and reheat steam temperature of 566℃, adopt figure 1 The flow chart of the method provided by the present invention is shown. The calculation software is written in C language and runs on the computer for monitoring and controlling the parameters of the steam turbine, such as figure 2 The computer software block diagram of the method of the present invention is shown to evaluate and predict the calendar life of the high-pressure rotor of the steam turbine online.

[0046] The first step: the working temperature of the rounded part of the rear outer surface of the steam turbine high-pressure rotor regulating stage impeller is 514.7℃, which exceeds 500℃, and there is stress concentration in the rounded part, which is the weak part of the steam turbine high-pressure rotor life;

[0047] Step 2: The creep life of the weak part of the steam turbine ...

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Abstract

The on-line prediction and evaluation method for calendar service time of high-temperature appliance of steam turbine comprises: if the residual loss prediction value ER of the appliance over the safe allowance EA, proposing the staff to adjust the set value of steam turbine to reduce main steam temperature variable rate during startup and loading variable rate, re-determining the low-cycle fatigue lifetime and the prediction values of annual calendar lifetime loss and residual loss, re-evaluating on-line calendar lifetime till the calendar lifetime on controlled security state. This invention is reasonable and applied.

Description

technical field [0001] The invention relates to an online evaluation and prediction method for the calendar life of a high-temperature durable part of a steam turbine, which is applied to the online calendar life management of the steam turbine and belongs to the technical field of the steam turbine. Background technique [0002] The high-temperature durable parts of steam turbines refer to the rotors, cylinders, nozzle chambers, main steam valve casings, control valve casings and steam pipes of high- and medium-pressure steam turbines. The main damage mechanisms for evaluating the life of high-temperature durable parts of steam turbines are creep and low-cycle fatigue. The unit of creep life of high-temperature durable parts of steam turbine is operating hours, and the unit of low-cycle fatigue life of high-temperature durable parts of steam turbine is the number of starts and stops. The calendar life of high-temperature durable parts of steam turbines includes the creep li...

Claims

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Application Information

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IPC IPC(8): G06Q10/00G06Q50/00G06F19/00
Inventor 史进渊杨宇邓志成
Owner SHANGHAI POWER EQUIP RES INST
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