Title: On-line monitoring method for variation of through-flow gap of steam turbine
Application Number: 200610131647 Application Date: 2006.11.10
Publication Number: 1952590 Publication Date: 2007.04.25
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01B5/14;G01M15/00;G01K17/00
Applicant(s) Name: Northeast Electric Power University Address:
Inventor(s) Name: Li Yong;Zhang Yi;Cao Lihua;Zhang Aiping;Zhou Zhenq
Attorney & Agent: chenchuan lin
Abstract:
    An on-line monitoring method for the changing circulatation gap of the steam turbine is disclosed that comprises the steps: acquiring data, calculating the flux of the main steam, correcting parameters of the regenerative system, correcting the primary parameter and the end parameter, designing the parameter fitting in operating mode and diagnosing the augment of circulating gap. The main steam flux of the steam turbine can be obtained by computer from the main steam temperature and pressure of the main steam, the regenerative steam temperature and pressure, the vacuum condenser, the temperature and pressure in each of the regenerative exhaust points, the water temperature of the ports, the drain temperature and the water flux of condensate, the flux value of the cooling water of the superheater and the reheater when the steam turbine is running. Based on the heat balance diagram in the operating mode of the steam turbine, the temperature, pressure and the internal efficiency ratio of the regenerative ports in the condition of the main steam are contrasted with the real temperature, pressure and the internal efficiency ratio of the regenerative ports to realize the on-line monitoring for the changing circulatation gap of the steam turbine. The method is scientific to realize the automatical on-line monitoring and exact fault diagnosis.
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