How do piston rings distinguish between one or two?

The first ring and the second ring are called compression rings and oil rings. One ring is narrow, the edge is smoother, and the two rings are wide. Edge stabbing. The two rings are generally black and have good rigidity. The compression ring can be used to seal the compressed air in the combustion chamber; The oil ring is used to scrape off excess oil on the cylinder. Their materials are different. The working environment of the first ring is the worst, and the other rings decrease in turn. Piston Ring (Piston Ring) It is a metal ring used to embed inside the piston groove. Piston rings are divided into two types: compression ring and oil ring. The compression ring can be used to seal the combustible mixed gas in the combustion chamber. The oil ring is used to scrape off excess oil on the cylinder. Piston ring is a kind of metal elastic ring with large outward expansion deformation, which is assembled into the section and its corresponding Annular Groove. Reciprocating and rotating piston rings, depending on the pressure difference of gas or liquid, form a seal between the outer circular surface of the ring and the cylinder, as well as one side of the ring and the ring groove. Piston rings are widely used in various power machines, such as steam engines, diesel engines, gasoline engines, compressors, hydraulic presses, etc. , and are widely used in automobiles, trains, ships, yachts, etc. Generally, the piston ring is installed in the ring groove of the piston. It and the piston, cylinder liner, cylinder head and other components form a chamber to do work. Why is the piston ring gas ring white and black? White is the first ring, Black is the second ring, and the outer circle of the white ring belongs to the barrel surface ring (Think about the shape of the barrel)The outer circle of the two-ring black ring belongs to the rectangular ring. The reason is: the engines are all high-speed engines. The piston movement has a short stroke, that is, the piston will swing left and right when running in the cylinder barrel, thus driving the changer to swing left and right. If a ring is a black rectangular ring, this swing will cause the edges and corners of the outer circle of the ring to scratch the inner surface of the cylinder barrel, and will also cause the catch surface to reduce the poor sealing, since the outer circle of the white ring is the barrel surface, no matter how short the stroke of your piston, the outer circle can always be closely attached to the inner circle of the cylinder, which will not cause bad sealing and scraping of the inner circle of the cylinder, during the movement of the piston, one ring swings much larger than the two rings. As the current engine tends to have short stroke and high rotation speed, the motorcycle makes one ring into a barrel ring. The first ring and the second ring are called compression rings and oil rings. One ring is narrow, the edge is smooth, the two rings are wide, and the Edge is stabbed. The two rings are generally black and have good rigidity. The compression ring can be used to seal the compressed air in the combustion chamber; The oil ring is used to scrape off excess oil on the cylinder. Their materials are different. The working environment of the first ring is the worst, and the other rings decrease in turn.

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