Method for diagnosing periodic fluctuation vibration of steam turbine generator unit shafting
A technology for turbogenerator sets and diagnostic methods, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve problems such as fluctuations and vibrations that cannot be solved well, achieve accurate location of defect causes, and solve engineering practice problem effect
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[0059] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Such as Figure 1-2 A method for diagnosing the periodic fluctuating vibration of the shafting of a turbogenerator set includes the following steps:
[0060] Step 1: Preliminary vibration analysis based on operation and vibration measurement data
[0061] (1) Analyze the cause of vibration in terms of oil inlet and outlet temperature:
[0062] Analyzing the inlet and outlet oil temperatures of each watt during operation shows that the temperature difference between inlet and outlet oil temperatures during 8-watt operation is analyzed. At 6-8°C, the temperature difference between the inlet and the return oil of 8 watts is obviously low, so it can be inferred that the load of 8 watts should be low; from the comparison of the temperature of the watts, although the temperature of the 8 watts is 91.4 ℃, it is the highest among the watts of...
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