Working principle of screw pump
Three screw pump is mainly fixed in the pump body of the bushing (pump cylinder) and inserted in the pump cylinder of the active screw and its meshing of two driven screw.
Three mutually meshing screw, in the pump cylinder according to each lead to form a sealed cavity, causing the seal between the suction nozzle.
The threads of the active screw and the driven screw mesh with each other to form several sealing lines.
These sealing lines with screw and single screw pump sleeve hole between the wall of the clearance seal to form a number of closed working chamber, and the pump suction room and discharge chamber separated.
So that the pump suction end of the working chamber can be in the screw rotation, volume gradually increased, suction liquid, with the screw continues to rotate, the liquid sealed in the working chamber, and sent to the pump discharge end;
With the rotation of the screw, the volume of the working chamber at the discharge end is gradually reduced, and the delivered liquid is extruded out of the working chamber and discharged into the output pipeline of the pump to complete the delivery of liquid.
Three screw pump, active screw diameter and section area are larger, when the pump work to bear the main load.
The main function of the driven screw is to prevent the liquid from leaking back into the suction chamber, and the meshing of the active screw and the driven screw also prevents the liquid from rotating with the screw.
At each turn of the screw, the supplied liquid moves one lead along the axial direction of the screw from the pump suction end to the outlet end.
The screw rotates continuously and the pump carries the liquid continuously.
Three screw pump series of products by the special shape of the curve of the spiral surface, in the work depends on the volume change of the screw meshing space to transport medium, can transport a variety of non-solid particles, non-corrosive lubricity of different liquids.
Three screw pump has been widely used in machinery, petroleum, chemical industry, metallurgy, steel, electric power, ships, building materials and other industries, a large number of use in these industries in the hydraulic, lubrication, fuel oil, transmission and other fields, in many occasions three screw pump has completely replaced diaphragm pump and gear pump.