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

A steam turbine, life-span technology

Active Publication Date: 2010-07-21
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, online evaluation or prediction of the calendar life of high-temperature durable parts of steam turbines cannot be realized during the use stage of steam turbines, and there is no suitable method available

Method used

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

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Embodiment

[0045] For a certain type of high-pressure rotor of a supercritical 600MW steam turbine whose main steam temperature and reheat steam temperature are 566°C, adopt figure 1 The shown flow chart of the method provided by the present invention adopts C language to write calculation software, and runs on the computer of steam turbine parameter monitoring and control, such as figure 2 Shown is the computer software block diagram of the method of the present invention, which evaluates and predicts the calendar life of the high-pressure rotor of the steam turbine on-line.

[0046] Step 1: The operating temperature of the fillet on the rear outer surface of the impeller of the high-pressure rotor of the steam turbine regulating stage is 514.7°C, which exceeds 500°C. There is stress concentration at the fillet, which is the weakest part of the life of the high-pressure rotor of the steam turbine;

[0047] Step 2: The creep life of the weak part of the high-pressure rotor of the steam ...

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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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Patent Type & Authority Patents(China)
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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