A real-time stress monitoring system and safety factor detection method for coupling bolts

Abstract

The invention relates to the field of stress monitoring of coupling bolts, and discloses a real-time stress monitoring system and safety factor detection method of coupling bolts. The signal sampling unit, power supply device and data processing unit inside or outside the cover; based on the aforementioned monitoring system, the logic control program is written into the data processing unit through the host computer, so that the data processing unit has the ability to calculate, judge and The ability of analysis, and then access the data processing unit through the host computer. This technical solution can realize the real-time monitoring of the axial stress of the bolts on the rotating parts of the hydro-generator unit and the axial water thrust of the turbine, and can also conduct regular evaluations on the reliability of the rotating connection system and the fatigue life of the connecting bolts, providing a guarantee for the safe operation of the power station. , Scientific maintenance and fault diagnosis provide quantitative and qualitative scientific basis.

Description

technical field [0001] The invention relates to the field of stress monitoring of coupling bolts, in particular to a real-time stress monitoring system and safety factor detection method of coupling bolts. Background technique [0002] Fasteners such as bolts and studs have been widely used in railways, bridges, hydropower, wind power, nuclear power, transportation, aerospace and other fields. Due to their complex and diverse working environments, they usually need to withstand large impact loads, temperature changes and Corrosion and other unfavorable factors, these unfavorable factors are likely to cause joint failure problems such as bolt looseness or fracture, therefore, early detection of defects in fixing parts and real-time working stress of bolts are of great significance to ensure the safe operation of equipment and improve equipment life. . [0003] The effectiveness of fastener joints is very important, and the stress state of their work can reflect whether they ...

AI Technical Summary

Problems solved by technology

The aforementioned technical scheme can achieve the relationship between residual stress and hardness by changing the residual stress loading at a certain temperature; it can also achieve a certain residual stress loading and obtain the relationship between residual stress and hardness by changing the temperature; but its implementation is If conditions permit, the temperature needs to be controlled and cannot be monitored in real time

However, the working status of the coupling bolts and other fasteners of the hydro-generator set is crucial to the safe and stable operation of the entire unit. Reduced connection reliability, fatigue damage of fasteners and reduced shafting stability, and even induce abnormal vibration of the unit, affect the normal economical, safe and stable operation of the unit, and reduce the life of the equipment. Therefore, the coupling bolts of the hydro-generator set It is necessary to implement online monitoring and real-time safety assessment of fasteners

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