Screw pump basic working principle of technology applications

The screw pump operates by using the rotational motion of its screws to draw in and expel liquid. Referring to the cross-sectional diagram of a three-screw pump shown here, the central screw serves as the main or active screw, which is powered by the prime mover. On either side of the active screw are the driven screws, which rotate in reverse to the active screw. Both the active and driven screws feature double-headed threads. Because the screws mesh with each other and fit snugly against the inner walls of the pump casing, one or more sealed cavities form between the suction and discharge points. As the screws turn and engage, new sealed spaces continually form at the suction end of the pump, trapping liquid within these chambers and gradually displacing it axially along the length of the screws toward the discharge end. These liquids are then released into separate compartments, much like a nut being pushed forward along a threaded rod during rotation. This process represents the fundamental operational mechanism of the screw pump. The working principle of the screw pump can be further explained as follows: when the pump is in operation, liquid is drawn into the sealed spaces created by the screw threads and the pump housing. As the driving screw turns, the volume of these sealed spaces increases due to the pressure exerted by the screw teeth, which in turn pressurizes the liquid and propels it axially. Given that the screw rotates at a consistent speed, the flow of liquid exiting the pump remains steady and uniform. Despite the complexity of this design, the screw pump offers several advantages, including efficient performance across various pressures and minimal pulsation in liquid delivery. Its smooth operation makes it ideal for applications requiring continuous and reliable fluid transfer, such as in industrial machinery or oil transportation systems. Additionally, the pump's compact structure contributes to its durability and ease of maintenance, making it a popular choice among engineers and technicians alike. With its ability to handle high-viscosity fluids and operate effectively under varying conditions, the screw pump stands out as a robust solution for numerous industries.

CNG Mass Flow Meter

Sealand is a trustworthy manufacturer of CNG Mass Flow Meter, CNG Mass Flowmeter, CNG Flow Meter, CNG Flowmeter, CNG Coriolis Meter, ATEX, IECEx & CE approved.

With its high accuracy, wide rangeability and reliable performance, Sealand meter has been applied in many kinds of industries during the last 8 years. Unlike others who only focus on the measurement of liquid at normal pressure & temperature, Sealand has conquered the difficulty in the measurement under severe conditions, such as high pressure, high viscosity, high & low temperature.
Take CNG (compressed natural gas) for example. As the saying goes, the meter can measure anything else if it can measure CNG. It is quite hard to measure gas under high pressure. The sensor must be able to bear high pressure; in this way, the thickness of flow tube must be increased, so the transmitter shall be more sensitive to detect the signal; however, Sealand made it. Sealand's first model is specially designed for CNG dispenser, and now thousands of this model are put into use on the market.

CNG Mass Flow Meter, CNG Mass Flowmeter, CNG Flow Meter, CNG Flowmeter, CNG Coriolis Meter

Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com