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

A diagnostic method and fault location technology, applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc., can solve problems such as difficult identification of fault locations and inability to accurately diagnose faults

Active Publication Date: 2019-09-13
CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 ang

Method used

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

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Embodiment Construction

[0081] like figure 1 As shown, the rotor surface fault is reflected in the expression of the rotor force. According to the force of the rotor at any position, a simplified mechanical model based on the principle of the single-span rotor fault position diagnosis method based on the three-dimensional coordinate system is established.

[0082] Assume are two unbalanced forces on the rotor, and plane I and plane II are two optional balance surfaces. According to the principle of equal force and moment, the Decomposed into two planes, namely:

[0083]

[0084]

[0085]

[0086]

[0087] Combine the forces in plane I and plane II to obtain the equivalent unbalanced force

[0088]

[0089]

[0090] can be decomposed into symmetrical forces of equal magnitude and same direction and antisymmetric forces of equal magnitude and opposite direction in:

[0091]

[0092]

[0093]

[0094]

[0095] Now assume that the vibration amplitude responses o...

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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...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01M1/14
CPCG01M1/14G01M13/00
Inventor 李敬豪阮圣奇吴仲陈开峰陈悦庞靖邢海波袁昊
Owner CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH
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