What are the causes of wear of Pneumatic Cylinders?

1. Inadequate lubrication conditions
The upper part of the Pneumatic Cylinder is close to the combustion chamber, with high temperature and poor lubrication conditions. The fine oil droplets in the fuel mixture will wash the cylinder wall, destroy the oil film formation, cause dry friction or semi-dry friction, and aggravate wear. Too thin or too thick oil, insufficient oil, oil pump failure, etc. will lead to poor lubrication and failure to form an effective protective film; the oil filter is blocked or improperly maintained, and impurities are mixed into the oil to cause abrasive wear.

2. Chemical corrosion wear
Sulfur in the fuel is burned to form sulfur oxides, which combine with water vapor to form sulfuric acid or sulfurous acid, corroding the cylinder wall. The loose layer formed by corrosion peels off during friction, accelerating wear. When the engine runs at low temperature for a long time, the acidic substances produced by incomplete combustion adhere to the cylinder wall, aggravating corrosion; at the same time, the oil has poor fluidity at low temperature and poor lubrication effect.

3. Mechanical wear
The piston ring is close to the cylinder wall under elastic force and gas pressure, and the mechanical friction generated by reciprocating motion leads to progressive wear. Bad driving habits such as sudden acceleration and frequent starting will increase the impact load of the piston on the cylinder, leading to local stress concentration and accelerated wear. Dust in the air, metal debris in the lubricating oil or fuel impurities enter the cylinder, forming abrasive particles that will also scratch the cylinder wall.