In this paper, the differences between single screw pump, twin screw pump and triple screw pump are analyzed in detail from the aspects of screw pump structure, characteristics, performance parameters and application occasions, as well as their respective advantages, disadvantages and applications. Type Construction Features Performance Parameters Applications Single-screw male single-headed male Spiral rotors rotate eccentrically within a special double-headed female helical stator (the stator is soft) that swings back and forth along the pump centerline and remains engaged with the stator. Conveying solid particles containing liquids 2 for fluids of virtually any viscosity, especially for highly viscous and non-Newtonian fluids 3 Limiting operating temperature to 150 m³ / h with stator material and pressures up to 20 MPa for molasses, flesh, Starch paste, chocolate paste, paint, asphalt, paraffin, grease, mud, clay, clay and other twin-screw pump has two screws of the same size, a drive shaft, a driven shaft, through the gear To achieve synchronous rotation 1, the screw and the pump body, and between the screw to maintain 0.05 ~ 0.15mm gap, wear small, long life 2, the packing box only by the suction pressure less leakage 3, compared with the three screw pump, the impurities do not Sensitive pressure is generally about 1.4MPa, viscous liquid maximum 7 MPa, the viscosity of the liquid up to 3 MPa, the flow is generally 6 ~ 600m³ / h, the maximum 1600 m³ / h, liquid viscosity may not For 1500mm² / s for lubricating oil, grease, crude oil, asphalt, fuel oil and other high viscosity oil three screw pump consists of a driving screw and two engaged with the driven screw 1, the active screw direct drive Driven screw, no gear transmission, simple structure 2, the pump itself as a screw bearing, no need to install radial bearings 3, the screw does not bear the bending load, can be made very long, so get high pressure 4, should not be transported Liquid 5 with solid impurities above 600μm for high-speed operation is a small, high-flow pump with high volumetric efficiency 6, the stuffing box communicates only with suction pressure with less leakage up to 70 MPa and flow up to 2000 m³ / h . Suitable viscosity of 5 ~ 250 mm² / s medium suitable for transporting lubricating oil, heavy oil, light oil and crude oil. Can also be used for glycerol and viscose and other highly viscous liquid delivery and pressure
