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The role of lubricants on dredgers

 The following describes the important effects of lubricants on dredgers:
    1. The volume of the dredging machinery and the volume of the fuel tank are small, the amount of lubricant oil installed is also small, and the oil temperature during operation is high, which requires the lubricating oil to have good thermal stability and oxidation resistance.
    2. Due to the harsh environment of the river water, coal dust, rock dust, and moisture, the lubricating oil will inevitably be contaminated by these impurities. Therefore, it is required that the dredger lubricating oil should have good rust, corrosion, and emulsification resistance. When the lubricant is required to be contaminated, its function will not change too much, that is, it will have less sensitivity to pollution.
    3. The temperature of open-air dredgers in winter and summer changes greatly, and the temperature difference between day and night in some areas is also large. Therefore, it is required that the viscosity of lubricating oils should be smaller than the change in temperature. It is necessary to prevent the oil viscosity from becoming too low when the temperature is high. It is not possible to constitute a lubricating film, and it is not possible to achieve a lubricating effect, and it is also necessary to prevent the viscosity from being too high at a low temperature, making it difficult to start and operate.
    4. With regard to certain dredging machinery and equipment, in particular, some machines used in mines that are prone to fires and explosions require the use of good flame retardant lubricants (anti-flammable liquids) and cannot use flammable mineral oils.
    5. It is required that the adaptability of the lubricant to the seal is better and the dredger seal is prevented from being damaged.


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