Seeking advice on oil-free lubricated reciprocating compressors
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I’m encountering a lubrication issue with a reciprocating compressor. Since I’m not an expert in mechanical engineering, I don’t quite understand it, so I’m seeking advice. Since the cylinders of oil-free lubrication reciprocating compressors are lubricated without oil, is there also a requirement regarding whether the packing gland of the piston rod should use oil or not?
One oil-free lubrication method I am aware of involves changing the material of the gaskets and piston rings, so that the reciprocating compressor does not suffer damage due to excessive heat generated by metal friction during operation; PTFE can be used as such a material.
Oil-free lubrication generally refers to the lubrication of cylinders without oil, which reduces both the amount of lubricating oil used and the contamination of the process gas； The filler oil should be reduced from a moderate amount to none; in other words, a small amount of lubricating oil should be added when the filler is first installed, but no further oil needs to be added after the running-in period is over. Close attention should be paid to the temperature of the piston rod, and the amount of cooling water used should be increased as appropriate.
1# Brass Knight 1. The cylinders of oil-free lubrication reciprocating compressors are lubricated without oil, and the piston rod stuffing boxes are also oil-free； 2. Reciprocating compressors use oil-free lubrication, mainly because the compressed gas medium has specific requirements – for example, in some hydrogenation processes, the catalysts require a very low oil content in the circulating hydrogen in order to prevent catalyst degradation. 3. In oil-free lubricated reciprocating compressors, the packing material used in the piston rod stuffing box is usually polytetrafluoroethylene, which possesses self-lubricating properties ； 4. For oil-free lubrication reciprocating compressors, the cooling of the piston rod and stuffing box is achieved as follows: 1. A cooling water system is added to the stuffing box ； 2. The piston rod is hollow, with lubricating oil flowing through it to carry away friction heat ；
Agree with the person on floor 4; generally, tetrafluoro materials are used to achieve a self-lubricating effect
Oil-free lubrication; it is used in conjunction with standard piston rings and metal expansion rings. The materials used for the piston rings and fillers are filled with tetrafluoroethylene, which provides good self-lubricating properties. In some cases, a layer of ceramic is also applied to the piston rod.
Generally, the fillers are also designed for oil-free lubrication, with very little oil-based lubrication used