Progressive cavity pumps are a common positive displacement pump whose unique operating principle allows it to play an important role in the field of liquid transfer. Below, we'll take a closer look at how progressive cavity pumps work to help better understand this efficient and stable liquid transfer device.
The basic structure of the progressive cavity pump:
The progressive cavity pump is mainly composed of a main screw and a slave screw, which are located in the pump body and form a spiral motion. The gap between the inner wall of the pump body and the screw is called the spiral groove through which the liquid is transported.
How it works:
Inhalation Phase:When the progressive cavity pump starts working, the main screw and the slave screw rotate separately. At this stage, the suction inlet of the pump body is opened and the liquid is introduced into the pump body.
Liquid filling:As the screw rotates, the liquid in the pump chamber begins to be drawn in gradually. The liquid fills the spiral groove while synchronizing with the spiral motion of the screw.
Discharge Phase:As the screw continues to rotate, the liquid is pushed from the spiral groove to the outlet of the pump body. At this stage, the discharge port of the pump body is opened and the liquid is discharged smoothly.
Continuous Cycle:The above process is continuous, and the progressive cavity pump realizes the positive, continuous and stable delivery of the liquid through the continuously rotating screw.
Key Points of Working:
Principle of positive displacement:A progressive cavity pump is a positive displacement pump, i.e. it is capable of fixing the volume of liquid with each rotation, ensuring precise delivery.
No pump chamber latching:The progressive cavity pump does not have the problem of locking the pump chamber during the working process, which helps to maintain the stable flow of fluid.
Adaptable:Progressive cavity pumps are suitable for a wide range of liquids, including liquids with different characteristics such as high viscosity, high temperature, and containing particles.
Overall, the progressive cavity pump smoothly transports the liquid out in a positive displacement manner through the rotation of the screw. Its simple and effective working principle makes it widely used in a variety of application scenarios and has become an important technology in the field of liquid transportation.