What are the reasons for the high temperature of the main thrust bearing in air separation turbines, and how should it be addressed during normal operation?
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The temperature of the main thrust bearing of the air separation turbine in our plant reaches around 120°C, which severely affects oxygen production and limits the ability to increase the load on the gasification process. I would like to ask fellow experts what the reasons for such high temperatures are, and how it can be addressed without shutting down the machine
A starting point for further discussion: 1. It’s possible that there is a fault with the probe; one could consider the readings from other temperature probes as well as the trend of readings from this probe itself； 2. If the probe readings are accurate, then check whether there is room for improvement in terms of lubricant pressure and temperature. The pressure can be referred to in the manual, while a temperature of around 45±5°C is generally appropriate ； 3. Has lubricant analysis been done? Has the quality of the oil deteriorated during operation, with an excess level of impurities or water? ； 4. The most difficult to deal with are mechanical failures, but such failures often come accompanied by vibration. If there is indeed a tendency in that direction, it’s best to have the manufacturer handle it. Of course, you can send them data such as temperature and vibration spectra in advance to assist with the diagnosis
The standard value for the main thrust bearing bush here used to be 65, but after one operation it suddenly rose to 92, as determined through inspection probes. Instructions. The oil temperature is fine; I think there’s a problem with the gap in the bearings, which is preventing the indicated temperature from dropping. Personal understanding
It is possible that there is a fault with the probe; you can refer to the readings of the other temperature probes as well as the trend of this probe’s readings； 2. If the probe readings are accurate, then check whether there is room for improvement in terms of lubricant pressure and temperature. The pressure can be referred to in the manual, while a temperature of around 45±5°C is generally appropriate ； 3. Has lubricant analysis been done? Has the quality of the oil deteriorated during operation, with an excess level of impurities or water? ； 4
What was said upstairs is correct; it’s time to stop the vehicle and carry out some maintenance
Typically, a steam turbine has more than 4 temperature measurement points for its thrust bearings; please check accordingly.