Screw pump - will pump what others can not afford

Liquids are different. Spring water is clean and transparent, easily flows from vessel to vessel and pumped by any of the types of pumps invented by man. But try to pump even a short distance concrete or even less viscous composition with the addition of the suspended parts, and there is already the majority of devices with the task of simply not cope.

That is to pump specific liquids, with varying degrees of viscosity, and often incorporates various impurities, and was coined by a screw or a screw pump.

The unit is one of the varieties of rotary gear pump, which is characterized by a reduced number of gear teeth and an increased angle of inclination of the teeth. It consists of moving parts (screws, projecting rotor) and a fixed part (the stator-housing). Propeller blades liquid moves along its axis in the chamber that is formed by the walls of the housing and the screw. Anyone who has ever used the meat grinder, understand this principle.

In various fields advantages of screw pumps simply undeniable. They are capable of pumping liquids without damage (changes) of the solid phase, provide high output pressure without the need for multiple injection stages, provide a uniform flow of pumped liquid, have the ability to self-priming pumped substance. Thanks to the good balance of the mechanism, it works with a very low noise level.

Scope of screw (auger) pumps high. They are widely used in mines to remove the charge from the wells are suitable for production of water, oil or gas. Depending on the particular application of the unit may have a metal or elastic body. The latter, however, can not withstand the increased pressure of the fluid.

Deficiencies in this type of pump is not so much. First of all, it is complicated and therefore expensive to manufacture assemblies. They lack the possibility of adjusting the working volume. They can not run the "idle" due to the possibility of overheating until complete failure.

But even taking into account the existing shortcomings screw pump to cope with a job that does not fulfill any more one device - will pump what others can not do.