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Gradually bending rotor field dynamic balancing method

An on-site dynamic balancing and progressive technology, applied in the field of power mechanical engineering, can solve problems such as large costs

Active Publication Date: 2014-09-10
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with the conventional dynamic balance test, the on-site dynamic balance of the curved rotor has obvious particularity. There are three main reasons. Irregular space curves often require dynamic balance correction of multi-order bending modes at the same time; third, bending rotors generally need to be removed from the cylinder or pumped out to apply sufficient counterweight to compensate them, which requires on-site dynamic balance It is successful once, otherwise it will cost a lot to re-open the cylinder or draw the rotor to adjust the weight

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  • Gradually bending rotor field dynamic balancing method
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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0050] The on-site dynamic balancing method of the progressive bending rotor is divided into three steps: pre-evaluation of the rotor bending state, decomposition of the bending mode, and formulation of a dynamic balancing scheme. They are inherited in one continuous line to achieve accurate and efficient on-site dynamic balancing. details as follows:

[0051] 1. Based on the historical vibration data of the progressive bending rotor, the gray prediction theory is used to predict its vibration development state, and the final vibration state of the vibration development at the front and rear bearings of the progressive bending rotor is obtained;

[0052] Specific steps are as follows:

[0053] 1) The historical vibration data of the progressive bending rotor is composed of time series X (0) ,which is:

[0054] x (0) ={X (0) (1),X (0) (2),X (0) (3),...,X ...

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Abstract

The invention discloses a gradually bending rotor field dynamic balancing method. When a rotor gradually bending accident happens to a steam turbine generator unit during operation, the gradually bending rotor field dynamic balancing method can effectively correct the balancing condition of the bending rotor in field to avoid the huge economic loss and safety risks caused by rotor returning processing. The gradually bending rotor field dynamic balancing method mainly comprises pre-evaluation of the rotor bending states, resolving of the bending vibration mode and formulation of a dynamic balancing scheme.

Description

technical field [0001] The invention belongs to the field of power machinery engineering, and relates to fault diagnosis and treatment of power plant equipment, in particular to an on-site dynamic balancing method for progressively curved rotors. Background technique [0002] In recent years, rotor bending accidents have occurred successively in several power plants of large turbo-generator units, and the amount of rotor bending gradually develops, and it takes at least a year or more to several years of operation to gradually stabilize. According to incomplete statistics, more than 20 domestically produced 600MW units have experienced progressive bending failures of high and medium pressure rotors to varying degrees; nearly 10 domestically produced 1000MW units have also experienced significant progressive thermal bending of generator rotors. [0003] At present, there are two common treatment methods for rotor bending faults of turbogenerator sets: one is direct axis treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/32
Inventor 何国安张学延张卫军葛祥刘树鹏杨青
Owner XIAN THERMAL POWER RES INST CO LTD