AFAIK bearings are also cooled by means of lubricating oil.
If the temp that the bearing is expected to reach is not to exceed 100 degees C, then no special provision is to be made for cooling the bearing. But if it exceeds that temperature, then it is expected to use lubricating oil
Along with providing lubricating effect to the bearing, the lubricant will also carry away the heat generated by frictional losses, thus mantaining the temperature of the bearing within acceptable limits :)
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The primary coolant is still lubricating oil.
But in order to ensure that the coolant temperature does not exceed its oxidation temperature, provision is made to transfer the heat to water surrounding it (through an interface surface)
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Coming back to the same topic:
When lubricating oil temperature exceeds its oxidation temperature i.e.100 degree centigrade,heat is transferred to water. It is possible that water gets converted to steam at this temperature. Please advise whether such situation can arise?
well if the heat transfered to the water by the lubricating oil raises the temperature of water to 100 C, then, assuming normal atmospheric pressure, it will get converted into steam. This steam will then have to be delt with, by condensing it.
But, the important point here is that the lubricating oil is preserved for further use. It is a lot easier/economcal to replace the water than to replace the lubricant.
Regards :)
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