Device and method for monitoring crack propagation life of turbine rotor

A technology of crack propagation life and steam turbine rotor, applied in the field of steam turbine, can solve the problems of steam turbine damage accident, brittle fracture of steam turbine rotor, etc.

Active Publication Date: 2012-06-20
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the crack of the steam turbine rotor expands to the critical crack size of the rotor crack, the steam turbine rotor may undergo brittle fracture, resulting in damage to the steam turbine
The existing steam turbine rotor lif

Method used

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  • Device and method for monitoring crack propagation life of turbine rotor
  • Device and method for monitoring crack propagation life of turbine rotor
  • Device and method for monitoring crack propagation life of turbine rotor

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Experimental program
Comparison scheme
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Embodiment

[0064] Such as figure 1 As shown, the block diagram of the steam turbine rotor crack extended life monitoring device of the present invention, the steam turbine rotor crack extended life device of the present invention is composed of an ultrasonic flaw detector 1, a computing server 2, a database server 3, a web server 4 and a client browser 5, and the ultrasonic The flaw detector 1 is connected to the database server 3, the calculation server 2 is connected to the database server 3 and the web server 4, and the web server 4 is connected to the database server 3, the calculation server 2 and the client browser 5 respectively.

[0065] Such as figure 2 Shown, the flow chart of steam turbine rotor crack extension life monitoring method of the present invention, as image 3 As shown, the computer software block diagram adopted by the calculation server of the present invention is installed on the calculation server of the steam turbine rotor crack extension life, and is...

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Abstract

The invention provides a device and a method for monitoring internal crack propagation life of a turbine rotor. The method includes the specific steps of: flaw detection and determination of crack size of the turbine rotor; computation of maximum main stress of parts where the crack is; computation of a critical crack size of the turbine rotor; computation of crack propagation life of the turbine rotor; computation of accumulation loss of the crack propagation life of the rotor in an overspeed test process device; computation of the accumulation loss of the internal crack propagation life of the turbine rotor; computation of the internal crack propagation residue life of the turbine rotor; controlling the crack propagation residue life of the turbine rotor; and printing an output result. The device and the method have the advantages that: the residual crack propagation life of the turbine rotor can be calculated on line and monitored regularly; if the residual crack propagation life of the turbine rotor is relatively short, the residual crack propagation life of the turbine rotor is rationally used by immediately overhauling (A-level overhaul); therefore, a technical scheme that the residual crack propagation life of the turbine rotor is monitored regularly is achieved.

Description

technical field [0001] The invention relates to a monitoring device and a method for monitoring the extended life of cracks inside a steam turbine rotor, and belongs to the technical field of steam turbines. Background technique [0002] The steam turbine rotor is characterized by large size and high-speed rotation, and the steam turbine rotor produces large principal stresses during start-up, shutdown and overspeed tests. No cracks can be found in the flaw detection inspection of the steam turbine rotor during forging and processing. During the operation of the steam turbine, under the action of large principal stress, the steam turbine rotor may expand into visible cracks in the flaw detection inspection. During the operation of the steam turbine, the rotor of the steam turbine is under the action of a large principal stress, and the flaw detection of the rotor shows that the cracks continue to expand. When the crack of the steam turbine rotor expands to the critical crac...

Claims

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Application Information

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IPC IPC(8): F01D21/00
Inventor 史进渊杨宇邓志成汪勇刘传亮
Owner SHANGHAI POWER EQUIP RES INST
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