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How to minimize the wear of piston rings  [2014/7/28]
 
Universal joints, steering arm info
Worn piston rings and cylinder liners car between the engine has the following characteristics:
A piston ring between the upper and lower dead point reciprocates speed changes from standstill up to 30m / s or so, to do so repeatedly substantial change.
2 when the reciprocating motion, the operating cycle of the intake, compression, power and exhaust stroke, the cylinder pressure changes greatly. 3 because of the influence of the combustion stroke, the movement of the piston ring is often carried out at elevated temperature, in particular the first ring, at elevated temperature and the chemical action of the combustion products produced, the film is difficult to establish, it more difficult to achieve full lubrication, lubrication and often in a critical state.
Upper and lower end of the piston ring wear mainly because of the mechanical grinding rigid fuel oil residues from entering into the atmosphere, and dust particles in the upper and lower end surfaces are formed, in essence, abrasive wear. However, when there is abnormal thermal deformation of the piston ring groove backlash variable hours, may also occur Fuser wear.
Since many factors affect the wear of piston rings, and these factors are often intertwined. In addition, different types of engines and conditions of use, piston ring wear is also very different, and therefore can not rely on its own to improve the structure of the piston rings and materials to solve problems, mainly from the following aspects to begin: the piston rings and cylinder liners materials and a good match; surface treatment; structural state; lubricants and additives choice; cylinder liners and piston deformation due to the heat caused by the assembly and operation, etc.




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