Fault diagnosis of large-scale units
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Gentlemen! Our company has newly installed a fault diagnosis system, but it cannot display spectrum graphs. Could everyone please help us figure out how to identify or determine problems, and explain how to read the graphs? Thank you!
I use a screwdriver to solve problems like this. :lol
There isn’t enough information; what should the alarm threshold be set at? Isn’t the passband frequency that large?
He is in all the pictures; the common frequency is 11.9, and the alarm level is 70
The first harmonic dominates, with low frequencies and higher harmonics present. The axis trajectories are all retrograde precession, with rubbing occurring at the sites!
I think the same as what is stated in the book, but when I consulted the manufacturer of the fault diagnosis system, they said that the amplitude wasn’t high and there was no friction. :Is there a standard for L?