High vacuum gear pump works

The GZB high vacuum gear pump separates the pump body into an oil suction chamber and a pressure oil chamber by the mutual meshing of the main driven gears. The oil suction chamber gradually disengages due to the meshing gear teeth, and the sealing work volume gradually increases to form a partial vacuum. Therefore, the oil in the oil tank enters the oil suction chamber through the oil suction tube under the influence of the external atmospheric pressure, and fills the interdental groove. And with the rotation of the gear, bring the oil to the pressure chamber on the left side. On the side of the pressure zone, as the gear teeth gradually come into engagement therewith, the volume of the sealed working chamber continues to decrease, and the oil is forced out of the pressure chamber into the pressure line.

When the motor is running, the propulsion device runs at high speed along with the spindle. The propulsion device is similar to an axial flow pump. The rate of emptying (vacuuming) of the propulsion device is much greater than the rate of gear engagement and evacuation. With the propulsion of the propulsion device, the gear The meshing anti-leakage is blocked and the ultimate vacuum formed is naturally greatly improved. The oil in the lower position is rapidly sucked into the pump chamber and then discharged through the oil discharge chamber.

When the resistance (pressure) in the oil circuit exceeds the set safe pressure, the safety valve is activated, so that the oil in the oil discharge chamber returns to the oil suction chamber so as to keep the pressure from rising and the safety valve acts as an overload protection.