The working principle of the triple screw pump is as follows:
Forming Sealed Spaces: The triple screw pump mainly consists of the driving screw in the middle and the driven screws on both sides. The three screws are meshed with each other and closely fit with the inner wall of the liner barrel of the pump body, thus forming one or more sealed spaces between the suction port and the discharge port of the pump.
Suction of Liquid: When the driving screw rotates under the drive of the prime mover, due to the rotation and meshing of the screws, new sealed spaces are continuously formed at the suction end of the pump, and these sealed spaces will enclose the liquid in the suction chamber.
Axial Displacement of Liquid: The liquid enclosed in the sealed spaces is continuously displaced axially from the suction chamber to the discharge end along with the rotation of the screws, just like a nut being continuously pushed forward when the thread rotates. Eventually, the liquid is discharged from the pump body, forming a continuous, stable, and axially moving pressurized liquid, providing a stable pressure for the system.
Realizing the Pressure Boosting Function: The threads of both the driving and driven screws are double-start threads, which enables the formation of several stages of dynamic sealed chambers between the inlet and the outlet of the pump. These dynamic sealed chambers axially move the liquid from the inlet of the pump to the outlet and make it pressurize stage by stage.
