Compressor oil station
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The compressor oil station does not have an oil mist fan; instead, it is supplied with nitrogen at a pressure of 0.34 MPa. What are the specific functions of this nitrogen? What is the difference between it and an oil station that uses an oil mist fan?
Nitrogen is primarily used to isolate oxygen and prevent the evaporation of lubricating oil, thereby reducing its oxidation; compared to oil stations that use oil mist fans, it **extends the service life of the lubricating oil.
The role of nitrogen is to isolate the air and prevent oxidation.
Reply to 2# yehuaqi007: I have another question. The oil tank of the oil mist fan operates under slight negative pressure; what is the pressure in the oil tank where nitrogen is used? Thank you for the answer! !
It must be positive pressure, right? 0.34 MPa in pressure
Reply to 1# mouse2003: For oil protection in the standby unit, it is acceptable to use nitrogen at a low flow rate. For units in normal operation, it is still best to use an oil mist fan for suction in order to maintain a negative pressure in the oil tank! It can also reduce leaks in areas such as oil seals, and eliminate the low-molecular-weight components resulting from oil decomposition caused by high temperatures in the operating areas.
If the fuel tank is under positive pressure, is the oil return smooth during normal operation? We have Hitachi compressors here, without oil mist fans. We have no prior experience with fuel tanks filled with nitrogen; please share any insights you may have! Thank you!
Nitrogen should be supplied through orifice plates, so the flow rate will not be high; it is used to isolate air, reduce oxygen partial pressure, and prevent oil oxidation. Oil stations have vent systems, and although nitrogen is introduced, it does not cause problems with oil return, unless it is a large-scale unit where the vent pipes are under heavy load and equipped with exhaust fans to facilitate the removal of oil vapor and ensure smooth oil return
Nitrogen is primarily used to isolate oxygen, thereby reducing and preventing the oxidation of lubricating oil
I believe this nitrogen is the feed gas that uses the jet principle to create negative pressure in the fuel tank. It serves the same purpose as an exhaust fan. You can search on Baidu for information on the principle of jets and their applications.
Reply to 1# mouse2003: This nitrogen gas supplied in this way is also known as isolation gas. It is introduced continuously at a pressure of 0.34 Ma, with the aim of preventing other substances from contaminating the lubricant. As the temperature of the lubricant rises after it has been lubricated, oil mist can form; this mist mixes with the isolation gas. The resulting mixture is then separated into oil and gas in an isolator before being reused.