In hydraulic systems, what is the role of the fluid?

In hydraulic systems, the primary role of the fluid is to transmit power and force. Hydraulic systems operate on the principle of fluid mechanics, wherein the incompressibility of hydraulic fluids allows for effective force transfer. When force is applied to the hydraulic fluid within a closed system, it is transmitted uniformly throughout the fluid, allowing for the operation of hydraulic cylinders, motors, and other components. This mechanism enables heavy loads to be moved or significant pressure to be generated with relatively little effort, which is why hydraulic systems are widely used in various applications, such as construction equipment, aircraft systems, and automotive brakes. The ability of the fluid to efficiently transmit power is central to the functionality of hydraulic systems, making it a crucial aspect of their design and operation.