In piston compressors, there are many types of oil-free lubricating compressors, and the degree of damage to the machine varies.
In the parts where the parts are relatively lubricated, such as piston rings and cylinders, main bearings, connecting rod big head bushes, and connecting rod small head bushings, lubrication is required. In the lubrication process, parts failure, blockage, poor sealing, etc. are prone to occur. Failure, as a compressor user, should identify the cause of the failure, design related measures to prevent failure, and ensure the safe operation of the compressor. The installation, maintenance and failure analysis of piston-type oil-free lubricating compressors are basically the same as those of oil-lubricated compressors. The difference between the parts is that the oil-free lubrication is the use of solid lubrication (such as filled PTFE, metal oxide, soft metal, etc.) piston ring, guide ring and packing (filler refers to the forming of the sealing ring) failure of these components will directly affect compression Machine performance.
The reasons for the easy sealing failure, the fault phenomenon and the treatment method are listed below for reference: the sealing failure caused by the serious wear of the guide (support) ring. Any oil-free lubricating piston made of PTFE material for the piston ring should be used with the piston rod. A guide ring made of the same material, also known as a support ring. Its function is to prevent the piston from being in direct contact with the mirror surface of the cylinder and wear it, and has a guiding function. At the same time, the horizontal or angle compressor cylinder of the brigade plays the role of supporting the gravity of the piston and the piston rod. If the guide ring is mounted in the position of the piston head, the guide ring can move out of the piston stroke and partially enter the valve valve hole passage when the piston enters the dead center. The non-notched full-circle guide ring allows for a 2/3 loop width to be exceeded; a notched full-circle guide ring allows for a 1/3 loop width to be exceeded.