Country/Region china
Company Chongqing Ogem Trade Co.,Ltd
Categories Cummins Engine Piston
Telephone +86-23-65358329
ICP License Issued by the Chinese Ministry
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4089500 Set, Piston Ring

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Cummins

Terex

4089500 Set, Piston Ring

Piston Ring is the mental ring used for embedding inside the piston groove. It is of two kinds: compression ring and oil ring. Compression ring can be used to seal the combustible gas mixture in combustion chamber; Oil ring is used to shave the redundant oil on the cylinder.

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Description

Piston Ring is the mental ring used for embedding inside the piston groove. It is of two kinds: compression ring and oil ring. Compression ring can be used to seal the combustible gas mixture in combustion chamber; Oil ring is used to shave the redundant oil on the cylinder. Piston ring is a bigger outward expansible deformable of metal elastic ring, assembled into section and its corresponding circular groove.

Depending on the pressure difference between the gas or liquid, reciprocating and rotating piston rings form the seal between the side of , in ring cylindrical surface and cylinder and ring and ring groove formed between a lateral seal.

The effects of piston rings include seal, oil-adjusting ( oil-controling), heat conduction (heat transfer) and direction (supporting). Seal refers to sealing gas, preventing the gas in the combustion leaking into the crankcase, controling the gas leakage at a minimum and improving the thermal efficiency.

Gas leakage not only decreases the engine power, but also makes the oil metamorphic, which is the main task of the gas ring. oil-adjusting ( oil-controling) is to scrape excess lubricating oil on cylinder wall , and also make a thin oil membrane on the cylinder wall to make sure normal lubrication of cylinder, piston and rings, which is the main task of the oil ring.

In the modern high-speed engine, the effect of piston ring controling oil film is paid a special attention. Heat conduction is to transfer the heat from piston rings to cylinder liner, namely cooling effect. According to reliable information, 70 ~ 80% of the heat of the piston top in the non-cooling piston is radiating from piston ring to cylinder wall, while there is 30-40% of the heat for a colling piston.

Supporting is to keep the piston in the cylinder, prevent direct contact bwtween the piston and cylinder wall, ensure smooth movement of piston, reduce the friction resistance, and prevent the piston knocking cylinder. The piston of general gasoline engine uses two gas rings and one oil ring, while diesel engines usually adopts two oil rings and one gas ring.

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