Oil leakage from turbine bearing housing
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During the maintenance of the turbine I installed, I found oil residue in the sealing gaps. I would like to ask fellow experts: how does lubricating oil get into those sealing gaps? The turbine operates under slight negative pressure, and there are oil barriers in place to prevent oil from leaking into the end seals. How does lubricant get into the machine?
In my opinion, there are several reasons: large oil seal leakage, low sealing steam pressure, and worn oil baffle rings.
My friend, if the sealing steam volume is too high, won’t that sealing air end up entering the bearing box?
The oil seal gap should have increased, indicating that it has failed. Use a feeler gauge to check whether the gap is still within the standard range. Also verify that the return flow of oil is unobstructed and that the oil intake volume is normal
The slight negative pressure is not sufficient; use a fan with a higher air volume instead. Disassemble it for maintenance, and be sure to apply the sealant properly next time.