Threaded Engagement Creates High-Pressure Chambers
The core secret of the screw pump lies in two precisely meshing screws. When the driving screw rotates, the driven screw rotates in opposite directions in sync, creating a continuously moving, sealed space between the threads. This design ensures the liquid is constantly propelled from the suction end to the discharge end, with each chamber acting like a mini-pressurization chamber-the finer the threads, the more chambers are formed, resulting in a more significant pressure superposition effect.
Progressive Compression Achieves Zero Backflow
Unlike the pulsed pressurization of piston pumps, screw pumps employ a progressive pressurization principle:
Stepped Pressurization: The liquid undergoes multiple stages of smooth pressurization between the threads.
No Dead-Angle Propulsion: Rotational motion eliminates flow fluctuations inherent in traditional pumps.
Fluid Guidance: The screw helix angle design controls the axial movement speed of the liquid.
This continuous pushing action, combined with an ultra-long-diameter ratio screw (commonly 3:1 to 5:1), ultimately accumulates into a powerful and stable outlet pressure.
Rigid seals combat liquid backflow. Ordinary pumps are prone to internal leakage under high pressure, while screw pumps exhibit remarkable sealing capabilities:
A precise 0.01-0.05mm gap is maintained between the metal screws, reducing friction and preventing backflow.
High-viscosity media will self-fill the microscopic gaps to form a liquid film seal.
The higher the pressure at the discharge end, the tighter the threaded engagement surfaces adhere.
