The working principle of stainless steel screw pump

Stainless steel screw pump uses the rotation of the screw to suck and discharge liquid. The middle screw of the stainless steel screw pump is the active screw, which is rotated by the original idea. The screw on both sides is the driven screw, and it rotates in reverse with the active screw. The threads of the main and driven screws are double-ended threads. Because of the mutual engagement of the screws and the close fit between the screw and the inner wall of the liner, it is divided into one or more sealed spaces between the suction inlet and the discharge outlet of the pump. Following the rolling and meshing of the screw rods, these sealing spaces are continuously formed at the suction side of the pump, the liquid in the suction chamber is sealed therein, and the suction chamber is continuously pushed in the axial direction of the screw to the discharge end, and the liquid in each space will be sealed off. Continuous discharge, as is the case when the same nut is continuously pushed forward while the thread is turning, this is the basic working principle of the stainless steel screw pump.

The stainless steel screw pump mainly includes a motor, a stator and a rotor. The electric motor is connected through a speed reducer, a coupling, and a transmission shaft. The transmission shaft drives the rotor to roll eccentrically in the stator. The suction chamber and the discharge body are in contact with the medium. The inner surface of the pump is sprayed and formed with a Teflon coating or a polyfluorinated ethylene propylene coating. The transmission shaft is connected with the rotor through the second universal joint, the intermediate shaft and the first universal joint, wherein the surfaces of the second universal joint, the intermediate shaft and the first universal joint are sprayed and formed with an alumina ceramic coating. The utility model has the beneficial effects that the stainless steel screw pump solves the transportation frustration of the highly aggressive viscous medium. The service life is 5-10 times longer than that of ordinary austenitic stainless steel screw pumps. Compared with titanium alloy or other corrosion resistant alloys, the cost is reduced by 50%-70%. It is particularly suitable for the chemical industry that uses seawater, salt and brine as raw materials.