Problems with the oil system of reciprocating compressors
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Dear engineers, I have a question: at the outlet of the oil pump in a reciprocating compressor, there are two streams of oil. One stream passes through the oil cooler and then through a filter to be used for lubrication; what is the purpose of the other stream? I really need expert advice
The other route returns to the tank, where the lubricating oil pressure is controlled by a control valve. :lol
Yes, the other route you mentioned is the one that leads back to the fuel tank. Most compressors are configured this way; slightly larger units are equipped with oil pressure protection.
Reciprocating compressors are not steam turbines
The function of this control valve is to reduce its opening when pressure is low, thereby decreasing the amount of oil that returns to the tank； Increase it when the pressure is high to boost the amount of oil returning to the tank, thereby keeping the oil pressure within the set range. When the oil pressure falls below the very low limit, the backup oil pump will start; if the oil pressure still cannot be achieved, the compressor will shut down to prevent damage.