Operation of the vane pump

In a balanced vane pump, the rotor is driven by the driveshaft and rotates inside an oval ring. The vanes are threaded into the slots within the rotor and slide freely in or out.

The « balanced » a part of this pump is explained by the position of the liquid inlet and outlet ports. The pump has two inlet ports, located opposite one another . It also has two outlet ports, also located on one side of the pump and therefore the other. These two installations are connected to a central entrance and exit.

Functioning

As the rotor rotates, the vanes are thrown against the inner surface of the ring by force . When the vanes conform to the contours of the oval ring, they divide the arch-shaped parts between the rotor and therefore the ring into two separate chambers. These chambers expand and shrink twice with each revolution. Entrance ports are located where each chamber begins to expand, while exit ports are located where each chamber begins to shrink.

As the chamber begins to enlarge, liquid flows in to fill the partial vacuum. This liquid is then transported by the pallets. because the chamber begins to shrink, the trapped liquid is pushed towards the outlet. During the last half of the revolution, this action is repeated at the extent within the second installation of entry and exit clearances.