Briefly Introduce the Working Principle of Hydraulic Pump


The hydraulic pump is the power component of the hydrau […]

The hydraulic pump is the power component of the hydraulic system. It is driven by the engine or electric motor. It sucks the oil from the hydraulic oil tank, forms a pressure oil and sends it to the actuator. The hydraulic pump is divided into gear pump, plunger pump, vane pump and screw pump according to the structure.

Working principle of hydraulic pump

The working principle of the hydraulic pump is that the movement brings about a change in the volume of the pump cavity, thereby compressing the fluid so that the fluid has pressure energy. The necessary condition is that the pump chamber has a sealed volume change.

A hydraulic pump is a type of hydraulic component that provides pressurized liquid for hydraulic transmission. It is a type of pump. Its function is to convert the mechanical energy of power machines (such as electric motors and internal combustion engines) into the pressure energy of liquids. Its cam is driven by the motor to rotate.

When the cam pushes the plunger upward, the seal volume formed by the plunger and cylinder decreases, and the oil squeezes out of the seal volume and is discharged to the required place through the check valve. When the cam rotates to the descending part of the curve, the spring forces the plunger downward to form a certain degree of vacuum, and the oil in the oil tank enters the sealed volume under the action of atmospheric pressure. The cam continuously raises and lowers the plunger, the sealing volume decreases and increases periodically, and the pump continuously sucks and discharges oil.

There are many factors that affect the service life of the hydraulic pump. In addition to the pump's own design and manufacturing factors, it is also related to the selection of some pump-related components (such as couplings, oil filters, etc.) and the operation during the test run.

You can click here to learn more: China vane pump.