Method for detecting interlocking function of bearing lubricating oil pump of turbine during starting of APS (Advanced Planning System)

Abstract

The invention relates to a method for detecting the interlocking function of a bearing lubricating oil pump of a turbine during the starting of an APS (Advanced Planning System), which comprises the following steps of: bringing a step of doing a DCS (Distributed Control System) interlocking test on a direct-current lubricating oil pump when the oil pressure of a bearing is lower than a value of II between a step of commissioning the lubricating oil pump of the turbine and a step of commissioning a jigger; bringing a step of doing an electric interlocking test on the direct-current lubricating oil pump when the oil pressure of the bearing is lower than the value of II between the step of commissioning the jigger and a turbine latching and rolling step; and bringing a step of doing a DCS interlocking test on an alternating-current lubricating oil pump when the oil pressure of the bearing is lower than a value of I between a step of switching a main oil pump with a constant speed of the turbine and an automatic quasi-synchronization step. The invention realizes an online detection of the interlocking function of the bearing lubricating oil pump with a main oil pump-oil ejector during the starting of the APS and has the advantages of automation, direction, applicability and safety. The method cannot only give play to the advantages and characteristics of an APS starting system, but also follow the working characteristics of the bearing lubricating oil pump with the main oil pump-oil ejector. The invention has the advantages of filling up the blank of the method for detecting the interlocking function of the bearing lubricating oil pump of the turbine during the starting of the APS and bringing strong significance in guidance and reference on the design and development of the APS.

Description

Technical field: [0001] The invention relates to a method for detecting the oil pressure interlocking of the lubricating oil pump of the steam turbine bearing based on the APS (Automatic Plant Start-up And Shut-down System) start-up system of the unit, specifically a kind of APS start-up system of the unit A program-controlled detection and guarantee method for the important interlocking function of the oil pressure of the bearing lubricating oil pump. Background technique: [0002] The steam turbine bearing lubricating oil system is one of the most important systems of a large steam turbine unit. Judging from past accident cases, once the lubricating oil of the bearing is interrupted during the rotation of the main shaft of the turbine, it is likely to cause a major accident in which the bearing of the turbine breaks the oil and burns the tiles. [0003] In order to avoid such failures, the turbine bearing lubricating oil system usually sets the following three important i...

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Problems solved by technology

[0016] The purpose of the present invention is to aim at the deficiencies of the existing testing technology, and to propose a method for detecting the steam turbine bearing lubricating oil pump during APS starting for domestically produced steam turbine units with a main oil pump-injector bearing lubricating oil system based on the APS starting mode. The method of interlocking function solves and guarantees the reliability and anti-accidentity of the steam turbine bearing lubricating oil system during APS start-up of the unit

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