Steam turbine generator unit rotor eccentricity and phase measuring device and method

Abstract

The invention discloses a steam turbine generator unit rotor eccentricity and phase measuring device and method. The device comprises a key phase sensor and a shaft displacement sensor, wherein the key phase sensor and the shaft displacement sensor are respectively connected with two preposed device; the output ends of the two preposed devices are connected with data acquisition equipment, the data acquisition equipment is connected with a computer, the key phase sensor is installed beside a measuring groove in the circumferential surface of a rotor or a rotor extension shaft, a probe of the key phase sensor directly faces the measuring groove, and the shaft displacement sensor directly faces the rotor end surface of the steam turbine generator unit and is perpendicular to the rotor end surface. According to the invention, the eccentricity and phase of the rotor of the steam turbine generator can be measured, the bending condition of the rotor is mastered, and the steam turbine generator unit is guided to perform operations such as cylinder holding, unit turning and impulse starting; the rotor bending state caused by turbine water inflow, turbine generator unit shafting friction and the like can be judged, and qualitative judgment of the rotor bending degree and quantitative judgment of the circumferential position of shaft bending are achieved through accurate measurement of rotor eccentricity.

Description

technical field [0001] The invention relates to a device and method for measuring rotor eccentricity and its phase of a turbogenerator set, and belongs to the technical field of rotor eccentricity and phase measurement of a turbogenerator set. Background technique [0002] The steam turbine generator set is an important equipment in a thermal power plant, which is responsible for converting heat energy into electrical energy. The eccentricity of the turbogenerator is an important data for the safe operation of the unit, an important reference for the bending degree of the rotor of the turbogenerator, one of the important parameters monitored during the startup and shutdown process, and an important basis for the startup of the turbogenerator. At present, the eccentric probe of the steam turbine generator set is generally set at the position of the machine head and facing the surface of the rotor. This setting is affected by the oil pressure fluctuation of the jacking shaft o...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method for measuring the eccentricity of the rotor of a turbogenerator set and its phase, which solves the problem that the eccentricity measurement of a turbogenerator set is affected by the fluctuation of the height of the rotor jacking up and the measurement is inaccurate, and solves the problem that the current Some units use the No. 1 bearing shaft vibration probe instead of the eccentricity probe, which causes the problem that the eccentricity cannot reflect the bending degree of the rotor normally

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