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Early warning method for water turbine collision and wear failure

A technology of fault warning and water turbine, which is applied in the field of water turbines to achieve the effects of ensuring safe operation, reducing equipment damage, and high reliability

Active Publication Date: 2015-10-21
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for early warning of hydraulic turbine friction failure in view of the backwardness of the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Obtain real-time data of the turbine. Through the online monitoring system of the hydropower unit, the real-time data of the water guide shaft displacement of the hydraulic turbine to be warned, the real-time data of the horizontal vibration of the top cover, and the real-time data of the vertical vibration of the top cover are searched;

[0024] (2) Evaluation of water turbine collision and grinding. According to the real-time data of the water guide shaft displacement of the hydraulic turbine to be warned, the real-time data of the horizontal vibration of the top cover, and the real-time data of the vertical vibration of the top cover obtained in step (1), use conventional methods to evaluate the displacement of the water guide shaft of the hydraulic turbine to be warned. amount, the horizontal vibration impact amount of the top cover, and the vertical vibration impact amount of the top cover;

[0025] (3) Determine the early warning value. According to the disp...

Embodiment 2

[0033] Steps (1)~(3) are with embodiment 1;

[0034] (4) Make a fault judgment:

[0035] (4.1), compare the amplitude to make a fault judgment. Based on the displacement offset of the hydraulic turbine to be warned in step (2), the horizontal vibration impact of the top cover, the vertical vibration impact of the roof and the displacement of the hydraulic turbine to be warned in step (3) The minimum early-warning threshold of displacement, the minimum early-warning threshold of the horizontal vibration impact of the top cover, and the minimum early-warning threshold of the vertical vibration impact of the top cover are compared to determine whether the friction of the hydraulic turbine to be warned meets the failure condition of the hydraulic turbine. Judgment: Step (2) evaluates the hydraulic guide shaft displacement offset of the hydraulic turbine to be warned is not greater than the minimum warning threshold value of the hydraulic guide shaft displacement calculated in step ...

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PUM

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Abstract

The invention discloses a collision and grinding fault early-warning method of a water turbine. The method comprises the following steps: (1) obtaining real-time data of the water turbine, (2) conducting collision and grinding evaluation on the water turbine, (3) determining an early-warning value, (4) conducting the fault judgment, (5) deciding whether the collision and grinding fault early warning of the water turbine is implemented or not, and (6) conducting the collision and grinding fault early warning of the water turbine. The fault judgment comprises (4.1) amplitude comparison fault judgment, (4.2) working condition comparison fault judgment and (4.3) mode comparison fault judgment. The method has the advantages of being capable of timely issuing the collision and grinding fault early-warning messages of the water turbine and precautionary measures for preventing the collision and grinding of the water turbine from being expanded, reducing the damage degree of the water turbine, preventing serious accidents, caused when a top cover is torn, that water floods a workshop from happening, being high in practicability and reliability, and being of great significance in ensuring the safety operation of a hydroelectric generating set.

Description

technical field [0001] The invention belongs to the technical field of water turbines, and in particular relates to an early warning method for a water turbine friction failure. Background technique [0002] The water turbine is an important energy conversion part of the hydroelectric unit. Since the water turbine works under water, the water turbine has many parts and complex structure, and it is very prone to collision and friction failures. Once a rubbing fault occurs, it will be difficult to find out the cause of the fault if it is not dismantled and overhauled in time. However, when the water turbine is subjected to serious friction, for example, the decompression plate falls off, it can often cause the entire unit to vibrate, resulting in damage to the components. Long-term friction will also cause the top cover to tear and cause serious accidents such as flooding of the factory building. Moreover, such serious accidents have occurred in many power plants at home and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
Inventor 王辉斌
Owner STATE GRID HUNAN ELECTRIC POWER