Description: The first-stage piston ring of a natural gas compressor is a core wear-prone part of the reciprocating compressor piston assembly. It is assembled in the first-stage piston ring groove and reciprocates with the piston; it is divided into gas rings and oil rings and is used to seal natural gas compression in the first-stage cylinder.
It seals the gap between the first-stage piston and the cylinder liner, preventing compressed natural gas from leaking into the crankcase, maintaining the working pressure of the first-stage cylinder, and ensuring the compressor intake compression efficiency and gas delivery volume.
The oil ring scrapes away excess lubricating oil from the cylinder wall, forming a suitable oil film, reducing friction between the piston and cylinder liner, and preventing a large amount of lubricating oil from entering the gas passage.
It withstands the gas pressure differential of the first-stage cylinder, reduces gas leakage losses, and improves the working conditions of the piston assembly.
Open annular structure, with multiple gas rings combined with oil rings; filled PTFE modified engineering plastic is mostly used in natural gas conditions, and some rings are fitted with bronze reinforcement bushings, featuring self-lubricating, wear-resistant, and oil and gas corrosion resistant properties; the opening compensates for thermal expansion during operation, and the rings are installed as a set in the piston ring groove.
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