Professional complete set of dosing device factory, screw pump is also known as screw water pump and Archimedes screw pump. A pump that uses the rotation of the spiral blade to make the water spirally rise along the axial direction. It is composed of shaft, spiral blade and shell. When pumping water, the pump is tilted into the water, so that the inclination angle of the main shaft of the pump is less than that of the spiral blade, and the lower end of the spiral blade contacts with the water.

When the prime mover drives the screw pump shaft to rotate through the speed change device, the water enters the blade and rises along the screw channel until it flows out. It has the advantages of simple structure, convenient manufacture, large flow, small head loss, high efficiency and convenient maintenance, but it needs to set up speed change device for low head and low speed. It is mainly used for irrigation, drainage, sewage, sludge, etc. It has been used in China since the 1970s.

The device of screw pump includes prime mover, variable speed transmission device and screw pump, as shown in Figure 1, which is composed of screw blade 1, pump shaft 2, bearing seat 3 and shell 4. The screw pump is obliquely installed between the upper and lower pools, and the lower blade of the screw pump is immersed below the water surface. When the pump shaft rotates, the spiral blade pushes the water in the pool into the blade groove, and the water rises along the spiral shaft under the action of the spiral blade.

To the outlet of the screw pump. The screw pump only changes the potential energy of the fluid, which is different from the vane pump which converts the mechanical energy into the potential energy and kinetic energy of the liquid. Screw pump according to the number of screws into. Single screw pump - single screw in the pump body thread groove in the bite rotation of the pump. Twin screw pump - a pump in which two screws engage each other to deliver liquid. Three screw pump - a pump in which multiple screws are engaged to deliver liquid.

The three screw is mainly composed of a bushing (pump cylinder) fixed in the pump body, a driving screw inserted into the pump cylinder and two driven screws engaged. Three mutually occluded screws form a sealing chamber in the pump cylinder according to each guide, causing the sealing between the suction ports.