What are the three rings of a piston ring called?
1 Answers
Piston rings consist of three rings: the compression ring, the sealing ring, and the oil control ring. A piston ring is a metal elastic ring that expands outward and is installed into a corresponding groove on the piston. Through reciprocating and rotational motion, the piston ring relies on the pressure difference of gas or liquid to form a seal between the outer surface of the ring and the cylinder wall, as well as between the ring and the side of the ring groove. The functions of piston rings are: 1. Sealing: This refers to sealing the combustion gases, preventing them from leaking into the crankcase, minimizing gas leakage to improve thermal efficiency. 2. Oil regulation: The rings scrape excess oil off the cylinder walls while ensuring a thin oil film remains for proper lubrication of the cylinder, piston, and rings.