Piston Ring and Piston Curl and Metal Piston Ring

Piston rings are widely used in a variety of power machinery, such as steam engines, diesel engines, gasoline engines, compressors, hydraulic presses, etc., widely used in cars, trains, ships, yachts and so on. Generally, the piston ring is installed in the ring groove of the piston, and it and the piston, cylinder liner, cylinder head and other components of the chamber to do work.

Piston ring is the core component inside the fuel engine, it and cylinder, piston, cylinder wall together to complete the seal of fuel gas. Due to its different fuel performance, its use of piston rings are not the same, the early piston rings are formed by casting, but with the progress of technology, steel high-power piston rings were born, and with the continuous improvement of engine functions, environmental requirements, a variety of advanced surface treatment applications, such as thermal spraying, electroplating, chrome plating, gas nitriding, physical deposition, surface coating, The zinc-manganese phosphating process greatly improves the function of the piston ring.

Function
Piston ring function includes sealing, regulating oil (oil control), heat conduction (heat transfer), guidance (support) four roles. Sealing: refers to sealing gas, do not let the combustion chamber gas leakage to the crankcase, the gas leakage is controlled at a minimum, improve thermal efficiency. Air leakage will not only reduce the power of the engine, but also make the oil deterioration, which is the main task of the gas ring; Adjust the oil (oil control) : the excess lubricating oil on the cylinder wall is scraped off, and the cylinder wall is covered with a thin oil film to ensure the normal lubrication of the cylinder and piston and ring, which is the main task of the oil ring. In modern high-speed engines, special attention is paid to the role of piston ring control oil film; Heat conduction: the heat of the piston is transmitted to the cylinder liner through the piston ring, that is, the cooling effect. According to reliable data, 70 ~ 80% of the heat received by the piston top of the uncooled piston is dispersed through the piston ring to the cylinder wall, and 30 ~ 40% of the cooling piston is dispersed through the piston ring to the cylinder wall; Support: The piston ring keeps the piston in the cylinder, prevents direct contact between the piston and the cylinder wall, ensures smooth movement of the piston, reduces friction resistance, and prevents the piston from knocking the cylinder. Generally, the piston of the gasoline engine uses two gas rings and one oil ring, while the diesel engine usually uses two oil rings and one gas ring.

1、Sealing action
The primary function of the piston ring is to maintain the seal between the piston and the cylinder wall to prevent the gas leakage from the combustion chamber to the crankcase, so as to control the amount of gas leakage to a minimum and improve the thermal efficiency of the engine. This sealing effect is mainly borne by the compression ring (gas ring).

2、Regulating oil
The function of the oil ring (oil ring) is to scrape off the excess lubricating oil on the cylinder wall, and at the same time ensure that a thin oil film is formed on the cylinder wall to ensure the normal lubrication of the cylinder, piston and ring. This not only prevents too much oil from entering the combustion chamber leading to increased fuel consumption and carbon accumulation, but also ensures good lubrication of the engine components.

3、Heat conduction
The piston ring also has the function of heat conduction, which can transfer the high heat generated by combustion to the cylinder wall through the piston ring, thus playing the role of cooling the piston. This process helps maintain the normal operating temperature of the engine and prevents overheating damage.

4、Supporting action
The piston ring also plays the role of supporting the piston, preventing the piston from contacting the cylinder wall directly, thereby reducing the friction resistance and ensuring the smooth movement of the piston in the cylinder. This support helps to reduce engine noise and wear, and extend the service life of the engine.