Centrifugal compressor
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What is the function of the exhaust fan located above the compressor oil tank?
Maintain a slight negative pressure in the fuel tank to ensure smooth oil return.
What is the mechanism of action, and by what methods is a slight negative pressure maintained?
It should work by using a fan to create airflow and draw out the oil and gas, just like a smoke extractor in a home
If the lubricating oil temperature is high, a fan is generally used to exhaust the oil fumes. Negative pressure can also be used, but it is not an absolute necessity
The high oil temperature can be adjusted using an electric heater, right?
Functions of the exhaust fan in the oil tank: 1. It removes the oil vapor from the lubricating oil, preventing the spread of oil fumes; it is particularly suitable for explosion-proof areas. Bearing housings equipped with an exhaust fan generally do not have breather valves. 2. It maintains a slight negative pressure in the oil tank, which facilitates the return of oil. 3. It prevents the lubricating oil from coming into contact with air and oxidizing. In the past, when there was no exhaust fan, nitrogen was used, with a pressure of around 2 KPa. 4. It can maximize the removal of the water vapor component from oil and gas. Summary: Personally, I think it is mainly due to safety and environmental protection considerations; everything else is secondary. Some will also add flame arresters.
So when does this exhaust fan need to be turned on, or should it stay on all the time?
It’s been running non-stop; it can’t stop, otherwise the fuel and oil won’t be able to flow out