Under normal circumstances, the harm of oil pollution to the hydraulic system mainly has the following aspects:
1. Pollution and wear of components
Various pollutants in the oil cause various forms of wear of the components, solid particles into the motion of the clearance, the surface of the parts to produce cutting wear or fatigue wear. The impact of solid particles in the high velocity liquid stream on the surface of the component causes erosion wear. The water in the oil and the products of oxidative deterioration of the oil have a corrosive effect on the components. In addition, air in the oil of the system causes cavitation, resulting in surface erosion and damage of the components.
2. Component blockage and clamping failure
Solid particles block the gap and orifice of the hydraulic valve, causing the spool to block and clamp, affecting the performance of the work, and even leading to serious accidents.
3. Accelerate the deterioration of oil performance
The water and air in the oil are the main conditions for the oxidation of the oil with its heat energy, and the metal particles in the oil play an important catalytic role in the oxidation of the oil. In addition, the water and suspended bubbles in the oil significantly reduce the movement. The strength of the oil film reduces the lubrication performance.