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Device and method for monitoring and controlling security risk of steam turbine rotor in on-line manner

A steam turbine rotor and safety risk technology is applied in the field of steam turbine rotor safety risk on-line monitoring and control devices, and can solve the problem that there is no steam turbine rotor online monitoring and control function.

Active Publication Date: 2011-10-26
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing steam turbine thermal protection system has the online protection function of rotor vibration, steam turbine expansion difference and rotor eccentricity, but does not have the online monitoring and control function of steam turbine rotor safety risk

Method used

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  • Device and method for monitoring and controlling security risk of steam turbine rotor in on-line manner
  • Device and method for monitoring and controlling security risk of steam turbine rotor in on-line manner
  • Device and method for monitoring and controlling security risk of steam turbine rotor in on-line manner

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Embodiment

[0048] like figure 1As shown, the block diagram of the steam turbine rotor safety risk online monitoring and control method of the present invention, the steam turbine rotor safety risk online monitoring and control device of the present invention consists of a vibration sensor 1, a steam turbine differential expansion sensor 2, a rotor eccentricity monitor 3, and a steam turbine thermal protection Composed of system interface, computing server, web server and client browser, the journals on both sides of the high and medium pressure cylinders and the journals on both sides of the low pressure cylinder are respectively equipped with two vibration sensors 1 installed at 45° to the horizontal plane. A steam turbine expansion differential sensor 2 is respectively installed on the journal of the generator side of the pressure cylinder and the journal of the generator side of the low-pressure cylinder, and a sensor 2 is respectively installed on the journal of the governor side of t...

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Abstract

The invention provides a method for monitoring and controlling security risk of a steam turbine rotor in an on-line manner. The method includes: calculating a fault probability FPi of the steam turbine rotor, monitoring a vibration signal of the steam turbine rotor on line, analyzing a vibration frequency of the rotor on line, monitoring a differential expansion signal of the steam turbine on line, monitoring an eccentric signal of the steam turbine rotor on line, calculating an average maintenance time MTTRi of the rotor, determining a weight coefficient Wi of the rotor fault result, calculating a security risk prioritizing number RPNi of the steam turbine rotor, evaluating security risk grade of the steam turbine rotor, determining a maximum security risk prioritizing number RPNmax of the steam turbine rotor, and recommending risk control measures of the steam turbine rotor. The invention provides an on-line monitoring and controlling method of the security risk of the steam turbine rotor, and realizes on-line calculation and control of the security risk of the steam turbine rotor.

Description

technical field [0001] The invention relates to a safety risk online monitoring and control device and method for a steam turbine rotor, belonging to the technical field of steam turbines. Background technique [0002] The rotor is an important part of the steam turbine, which converts the circumferential force of the steam acting on the blades into rotational mechanical energy and drives the generator to generate electricity through it. Since the steam turbine rotor rotates at high speed and bears a large centrifugal force, the safety of the rotor is very important to the safe operation of the steam turbine. During the operation of the steam turbine, the failure modes of rotor friction, large shaft bending and excessive vibration occur, and the consequences are serious. The safety risk of steam turbine rotor is related to the possibility of rotor failure and the consequences of rotor failure; the possibility of steam turbine rotor failure is related to the failure probabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00F01D5/02
Inventor 史进渊杨宇王兴平邓志成汪勇
Owner SHANGHAI POWER EQUIP RES INST
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