The Working Principle Of The Hydraulic Pump

It is a hydraulic component that provides pressurized liquid for hydraulic transmission and is a kind of pump. Its function is to convert the mechanical energy of power engines (such as electric motors and internal combustion engines) into pressure energy of liquids. The figure shows the working principle of a single-plunger pump. The cam is driven by an electric motor to rotate. When the cam pushes the plunger upward, the sealing volume formed by the plunger and the cylinder block is reduced, and the oil is squeezed out of the sealing volume and discharged to the place where it is needed through the check valve. When the cam rotates to the descending part of the curve, the spring forces the plunger downward, forming a certain vacuum degree, and the oil in the tank enters the sealing volume under the action of atmospheric pressure. The cam makes the plunger continuously rise and fall, the sealing volume periodically decreases and increases, and the pump continuously absorbs and drains oil.