Single-span rotor fault location diagnosis method and system based on three-dimensional coordinate system

Abstract

The invention discloses a single-span rotor fault location diagnosis method and system based on a three-dimensional coordinate system, and relates to the field of fault diagnosis of steam turbine generator sets. The method comprises the following steps: establishing the three-dimensional coordinate system, and taking the circle center of one end face of a rotor as an origin, wherein an X axis anda Z axis are along the radial direction of the rotor, and a Y axis is along the axial direction of the rotor; establishing an axial mechanical model of a YZ plane of the rotor; and calculating a coordinate location of a fault of the rotor in the three-dimensional coordinate system. The single-span rotor fault location diagnosis method and system disclosed by the invention have the advantages thatthe specific location of a fault point of the rotor in a three-dimensional space can be accurately identified, and a favorable evidence is provided for the subsequent fault diagnosis processing.

Description

technical field [0001] The invention relates to the field of fault diagnosis of steam turbine generating sets, in particular to a single-span rotor fault position diagnosis method and system based on a three-dimensional coordinate system. Background technique [0002] In actual on-site steam turbine generator set failures, judging the rotor fault location is an important part of the diagnosis process. For example, the rubbing fault of the rotor usually occurs in the diaphragm seal, the blade shroud seal, and the shaft end seal, and the radial rubbing may also occur in the oil block and steam block of each bearing. Rubbing may occur at the sealing pad, the black surface of the bearing pad, etc. In on-site troubleshooting, the diagnosis of the fault location plays a decisive role in solving the fault problem, and only the specific location of the fault can be diagnosed to further deal with the fault. [0003] At present, when judging the rotor fault location, taking the roto...

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Problems solved by technology

[0003] At present, when judging the rotor fault location, taking the rotor unbalanced fault as an example, the fault location on a certain plane of the rotor can be calculated according to the phase angle of the eddy current sensor, but it is difficult to identify the fault location of the rotor in three-dimensional space, and it is impossible to identify the fault location. make an accurate diagnosis

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