Description: The third-stage guide ring of a natural gas compressor is a wear-prone part of the reciprocating compressor piston assembly. It is assembled in the third-stage piston ring groove and reciprocates with the piston in the third-stage cylinder; it withstands the high-pressure conditions of the third stage and provides radial support and guidance for the piston.
It radially supports the piston body and isolates it from the inner wall of the cylinder liner, preventing direct contact with the liner and the resulting friction and scoring.
It constrains the coaxiality of the piston reciprocating motion, reduces piston radial oscillation, improves the stress state of the third-stage piston ring, and reduces piston ring wear.
It does not perform the main gas sealing function but only provides guidance and support, reducing unit vibration and abnormal noise and ensuring smooth piston operation.
Open sleeve-type ring, with an opening to compensate for thermal expansion during operation; filled PTFE modified engineering plastic is used for high-pressure natural gas conditions, featuring self-lubricating, wear-resistant, and oil and gas corrosion resistant properties; it is arranged in a single row or double row according to the piston structure and assembled in the piston guide ring groove.
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