The oil tank of a dredger, in addition to storing oil in the hydraulic system, also serves functions such as heat dissipation, separating air bubbles from the oil, and settling impurities. The oil tank is equipped with many auxiliary components, such as coolers, heaters, air filters (for filtering impurities), and level gauges.
Oil tanks can be divided into two types: open tanks and closed tanks. In open tanks, the liquid level is open to the atmosphere, and an air filter is installed on the tank cover (for filtering impurities). Open tanks have a simple structure, are easy to install and maintain, and are widely used in hydraulic systems. Closed tanks are generally used as pressure tanks, filled with a certain pressure of inert gas, with a filling pressure of up to 0.05 MPa. Based on the shape of the tank, they can also be divided into rectangular tanks and cylindrical tanks. Rectangular tanks are easy to manufacture, and hydraulic components are easily installed on them, so they are widely used; cylindrical tanks have high strength, are lightweight, and easy to clean, but they are more difficult to manufacture and occupy more space. They are often used in large metallurgical equipment.
