Comparison of the advantages and disadvantages of screw pumps for transporting slurry: those with reducers and those without them

This requires a professional to carry out the calculations, and a considerable amount of data is needed.

There is no issue of whether it’s good or bad; the key is whether the speed of the motor can match that of the pump. If they don’t match, then a reducer must be used

Those with a reducer have a lower speed but a longer lifespan, and are definitely more useful than those without a reducer.

Single-screw pumps are suitable for transporting media with high viscosity and impurity particles; a standard single-screw pump setup consists of the pump + reducer + motor. Pumps with direct connection are more commonly manufactured in the South. With a direct connection, single-screw pumps operate at higher speeds and thus have higher efficiency; however, in terms of service life, pumps with direct connection are usually equipped with 6-stage or 8-stage motors, giving them rotational speeds of 960 revolutions per minute or 720 revolutions per minute. Pumps equipped with reducers have a relatively low rotation speed. The choice of specific rotation speed depends on the viscosity of the medium being transported; the higher the viscosity, the lower the rotation speed. If you choose two screw pumps with the same diameter and equip them either with direct-drive motors or gearboxes, those equipped with gearboxes will have a lower flow rate but a longer service life, while those with direct-drive motors will have a higher flow rate but a shorter service life. It is recommended to use screw pumps equipped with gearboxes. ,