Below, we introduce the crucial role of lubricants in dredging ships.
The dredging machinery is compact in size and the fuel tank has a small capacity, requiring less lubricating oil. During operation, the oil temperature is higher, which demands the lubricant to possess excellent thermal stability and antioxidant properties.
2. Due to the harsh river environment, with abundant coal dust, rock dust, and moisture, lubricating oil is inevitably contaminated by these impurities. Therefore, it is required that the dredger's lubricating oil possess excellent anti-rust, anti-corrosion, and anti-foaming properties. It is also essential that the performance of the lubricating oil does not change significantly when it becomes polluted, meaning it should be relatively unaffected by contamination.
3. Open-cast dredgers experience significant temperature variations between seasons, with some regions having considerable day-night temperature differences. Consequently, it is required that the viscosity of the lubricant changes minimally with temperature. This ensures that the oil's viscosity does not become too low during high temperatures, preventing the formation of a lubricating film and its intended lubricating function, and also avoids excessively high viscosity during low temperatures, making start-up and operation difficult.
4. For certain dredging equipment, particularly machinery used in mining, it is required to use good lubricants; mineral oil is not permitted.
5. The lubricant must have good compatibility with the sealing components to prevent damage to the dredger's seals.
