Copeland D8SK Piston is one of the parts of Copeland D8SK machine, and the working conditions are bad. If the diesel engine is used and maintained improperly and the method of assembling Copeland D8SK Piston is incorrect, it will cause abnormal wear of the piston ring. Here is a brief introduction to the characteristics and reasons of Copeland D8SK Piston's abnormal wear and tear:

1. Fatigue damage

1) Features. The upper and lower working surfaces of the Copeland D8SK Piston have severe scratches and severe wear, and the piston ring color is dim; Frist: the piston ring and the cylinder contact surface are seriously worn, and most cylinder piston rings have small scratches along the cylinder axis. Marks; there is a lot of sludge and paint film on the back of the gas ring and around the oil return hole of the oil ring groove.

2) Reasons. The direct cause of the fatigue damage of the Copeland D8SK Piston is the operating mode and improper maintenance of the engine during the break-in period. Requires quality buckets and other accessories to look for smart manufacturing. The main influencing factors are: the diesel engine works under high-speed and high-load conditions for a long time during the running-in operation period, or suddenly turns off when the car is hot; The connecting hose between the air pipes is short-circuited, causing dust to enter the cylinder; the type of lubricating oil added does not meet the specified requirements, and the pollution is serious; the quality of the fuel injection of the injector is poor or the quality of the selected fuel is poor, and the diesel engine works at low temperature for a long time; The oil advance angle is inaccurate, etc.

2. Fracture

1) Features. Copeland D8SK Piston fractures and more damage to the piston ring groove; there are corrugated pull marks on the outer working surface of the piston ring and the upper part of the cylinder; the piston skirt and the upper part of the cylinder are melted and worn; the fracture often occurs in the high point area on both sides of the opening .

2) Reasons. The direct cause of piston ring fracture is due to improper use or maintenance of the engine. The main influencing factors are: the diesel engine works under overheating for a long time, causing the piston ring to jam; the viscosity of the lubricating oil used is too large; the Copeland D8SK Piston is unreasonable or the installation method is incorrect, which causes the stress concentration of the piston ring; The matching clearance of the cylinder is too small; the diesel engine has been working under deflagration conditions for a long time, etc.

3. Sticky ring

1) Features. Copeland D8SK Piston and the piston ring groove have a large amount of sludge, carbon deposits and colloidal deposits; the outer working surface of the piston ring presents a polished luster, and there are deep longitudinal scratches; the elasticity of the piston ring is weak.

2) Reasons. The direct cause of the sticking ring is that the piston ring is bonded by sludge and carbon deposits, and the Copeland D8SK Piston and the cylinder are deformed. The main influencing factors are: severe thermal deformation of piston rings and cylinders, Copeland D8SK Piston backlash and backlash are too small, so that the ring can not move in the ring groove; diesel engine overheating or long-term overload work, causing the lubricating oil to produce high temperature colloid ; Poor quality of lubricating oil; poor quality of fuel injection; poor work of crankcase ventilation device, causing excessive negative pressure or poor cylinder air-tightness, causing oil to run up; unreasonable selection of cylinder liners or improper press-fitting method Cause deformation, etc.