What Is Hydraulic Pump?

Hydraulic pump is an energy conversion device, which converts mechanical energy into liquid pressure energy to provide pressure oil for the system. Hydraulic pump according to the structure can be divided into gear pump, plunger pump, vane pump and screw pump.

The basic condition of the hydraulic pump is that there is a sealed volume, and the sealed volume has periodic changes; There is a flow distribution mechanism, and the flow distribution mechanism is used to separate the oil suction port and the oil pressure port; The absolute pressure of the volume in the tank must be equal to or greater than the atmospheric pressure; The tank must communicate with the atmosphere, or use a sealed pressurized tank. Hydraulic pump is one of the important components in the hydraulic system, mainly used to provide sufficient pressure oil for the hydraulic system, its performance will affect the performance of a single equipment or even the whole system.

Hydraulic pumps are mainly used to drive and control various mechanical equipment in various ships. Specifically, the applications of hydraulic pumps on ships mainly include: steering gear, winch, crane, anti-roll fin, hatch cover, propeller control, hydraulic steering gear and so on.

The working principle of the hydraulic pump is based on the change of the sealed volume. Specifically, the hydraulic pump consists of a closed volume and a flow distribution mechanism. When the closed volume increases, a local vacuum is formed, and the atmospheric pressure pushes the oil into the volume; When the closed volume is reduced, the oil is squeezed and the pressure is raised, thus completing the conversion of mechanical energy to hydraulic energy. The function of the distribution mechanism of the hydraulic pump is to separate the oil suction port and the oil pressure port to ensure the continuous flow of hydraulic oil.

The working principle of the hydraulic pump is based on PASCAL's principle, that is, the liquid in a closed container, when the pressure is applied, the pressure of the liquid is transferred in all directions. Therefore, when the hydraulic pump produces high pressure oil, the actuator components such as the cylinder and the oil motor can be pushed to achieve linear or rotational motion.

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