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

A technology for safety risks and steam turbines, applied in the field of steam turbines, can solve the problems of online monitoring and control of safety risks of steam turbine bearings, etc.

Active Publication Date: 2011-10-12
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 online protection functions for rotor vibration, rotor axial displacement, bearing bush metal temperature, bearing return oil temperature and bearing lubricating oil pressure, but there is no online monitoring and control function for steam turbine bearing safety risks

Method used

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

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Embodiment

[0051] like figure 1 As shown, the block diagram of the online monitoring and control method of the steam turbine bearing safety risk of the present invention, the online monitoring and control device of the steam turbine bearing safety risk of the present invention is composed of a vibration sensor 1, an axial displacement sensor 2, a bearing metal temperature sensor 3, and a bearing return oil temperature. Sensor 4, bearing lubricating oil pressure sensor 5, steam turbine thermal protection system interface, computing server, web server and client browser. The thrust bearing on the side of the high and medium pressure rotor governor is provided with an axial displacement sensor 2, a Bearing metal temperature sensor 3 and a bearing return oil temperature sensor 4, radial bearing on the side of high and medium pressure rotor governor, radial bearing on the side of high and medium pressure rotor generator, radial bearing on the side of low pressure rotor governor and low pressur...

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Abstract

The invention relates to a device and method for monitoring and controlling the security risk of a turbine bearing in an on-line manner. The method comprises steps of: calculating a fault probability FPi of the turbine bearing; on-line monitoring a rotor vibration signal, a rotor axial displacement signal of the turbine, a bearing bush metal temperature signal and a bearing oil back signal as well as a bearing lubricating oil pressure signal of the turbine; calculating a mean time to repair MTTRi of the bearing, determining a weight coefficient Wi of bearing fault result; calculating a risk priority number RPNi of the turbine bearing; evaluating the turbine bearing security rank; determining the max risk priority number RPNmax of the turbine bearing; and recommending risk control measures of the turbine bearing. The invention provides the on-line monitoring and control method of the security risk of the turbine bearing, and realizes the on-line calculation and control of the security risk of the turbine bearing.

Description

technical field [0001] The invention relates to an on-line monitoring and control device and method for the safety risk of a steam turbine bearing, belonging to the technical field of steam turbines. Background technique [0002] There are two types of turbine bearings, radial bearings and thrust bearings. The bearings are used to bear the weight of the rotor and determine the correct position of the rotor in the cylinder. Radial bearings are used to bear the unbalanced force of rotor weight and rotation and to determine the radial position of the rotor, thereby ensuring the correct radial clearance between the rotor and stationary components such as cylinders, steam seals, diaphragms or vanes. The thrust bearing bears the axial thrust of the steam acting on the rotor, and determines the axial position of the rotor to ensure the correct axial clearance between the static and dynamic parts of the flow. The bearing has the failure modes of bearing bush burning, bearing wear, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00F01D25/16
Inventor 史进渊邓志成杨宇汪勇张琳
Owner SHANGHAI POWER EQUIP RES INST
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