Problems with the individual testing of steam turbines.
Thread Content
Here, the turbine undergoes individual testing upon leaving the factory; it is equipped with a reducer and a governor. Its operating speed is 5600 revolutions per minute, with the speed increasing after reaching 2500 revolutions per minute. The vibration level of the front bearing fluctuates, while that of the rear bearing remains stable. Let’s discuss what could be the cause of this
1. Is the warm-up time insufficient? 2. Is the speed increase too fast?
It’s stated too generally; could it not be due to insufficient expansion and rubbing, as well as inadequate warm-up? Also, is there an upward trend in the vibration of other bearings as well? Also, what is the bearing temperature? Also, is the critical zone provided consistent with what you feel in the car?
The original poster should write down the detailed process so that it can be analyzed
Measure the spectrum of the front bearing to see whether the power frequency, twice the frequency, or half the frequency is dominant. Generally speaking: 1. The half-frequency component is mainly caused by damage to the oil film. 2. The first-frequency component is usually due to rotor imbalance or water in the steam of the turbine, which leads to water hammer on the impeller and thus causes imbalance. 3. The second-frequency component is related to alignment issues; if it’s a pure second frequency, it’s caused by parallel misalignment, while the presence of both a first-frequency and a second-frequency component may indicate angular misalignment.
I’ve learned it! ! ! ! ! ! ! ! 11
I’ve learned it! ! ! ! ! ! ! ! 11
I’ve learned it; I’m using a 3500 here. I don’t know how to obtain the spectrum Thank you