The basic working principle of the hydraulic vane pump

The hydraulic vane pump realizes oil suction and discharge according to the change of volume, so it is also called a positive displacement hydraulic pump. A closed cavity is formed. Due to the change of the long and short diameters of the inner curved surface of the stator, the volume of this closed cavity is constantly changing when the rotor rotates. When the inner curved surface of the stator changes from the short diameter to the long diameter, the closed cavity increases and forms The vacuum sucks the oil through the oil suction port of the distribution plate to realize the oil absorption process; when the inner curved surface of the stator changes from the long diameter to the short diameter, the closed cavity is reduced, and the high pressure formed by the blade compression pushes the oil through the oil discharge of the distribution plate The outlet is discharged to realize the oil pressure process.

According to the structure, the hydraulic vane pump can be divided into: single-stage pump, double pump, double-stage pump and compound pump.

    1. Single-stage pump: It consists of a set of pump body parts and a set of internal organs (pump core assembly), with an oil inlet and an oil outlet, which can provide constant pressure and flow to a hydraulic system.

    2. Duplex pump: It consists of a set of pump body parts and two sets of different internal organs (pump core components) connected in parallel, with one oil inlet and two oil outlets, which can provide different pumps to one or two sets of hydraulic systems. pressure and flow.

    3. Two-stage pump: It consists of a set of pump body parts and two sets of identical internal parts (pump core components), with an oil inlet and an oil outlet, which can double the pressure of the low-pressure pump and can be supplied to a set The hydraulic system provides constant pressure and flow.

    4. Compound pump: Combine other valves on the basis of single-stage pumps to form reverse self-locking, liquid flow conversion, constant pressure, stable flow and constant power.