Below, we introduce the crucial role of lubricants in dredgers.
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 necessitates the lubricant to have excellent thermal stability and antioxidant properties.
Due to the harsh river water conditions, with high levels of 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 rust and corrosion resistance, as well as anti-foaming properties. It is also essential that the oil's performance changes minimally when it becomes polluted, meaning it should be less susceptible to contamination.
3. Open-cut dredgers experience significant temperature variations between summer and winter, and some regions have considerable differences in day and night temperatures. Therefore, it is required that the viscosity of lubricants change minimally with temperature. This ensures that the oil does not become too thin during high temperatures, preventing the formation of a lubricating film and rendering the lubrication ineffective. Similarly, it prevents the oil from becoming too thick during low temperatures, making it difficult to start and operate the equipment.
4. Certain dredging equipment, particularly machinery used in mines, requires the use of good lubricants and prohibits the use of mineral oil.
5. The lubricant must have good adaptability to the sealing components to prevent damage to the dredger's seals.
