What type of screw pump is divided into, what is the difference between them?
July 25 09:01:58, 2024
Screw pump is divided into single screw pump, twin screw pump, three screw pump. This article describes in detail their structure, characteristics, performance parameters, the difference between the four aspects of the application, as well as their advantages and disadvantages. Such as single-screw pump structure for the single-headed male screw rotors in a special double-headed female screw rotors eccentric (stator is soft), can swing back and forth along the pump center line with the stator always maintain engagement, twin screw pump structure There are two screw shafts of the same size, one is a driving shaft, one is a driven shaft, and a synchronous rotation is achieved through gear transmission. Single screw pump structure: Single-head male Spiral Rotor Eccentric rotation in a special double-headed female spiral stator (the stator is soft), can swing back and forth along the pump center line, and the stator always maintain engagement Features: 1, can transport solids Particulate liquid 2, for fluids of virtually any viscosity, especially for highly viscous and non-Newtonian fluids 3, Limiting working temperature to the stator material Performance parameters: Flow rates up to 150 m³ / h and pressures up to 20 MPa Applications: , Pulp, starch paste, chocolate paste, paint, tar, paraffin, grease, mud, clay, clay and other twin screw pump: Structure: There are two the same size of the screw shaft, a drive shaft, a from Moving shaft, through the gear to achieve synchronous rotation Features: 1, between the screw and the pump body and the screw to maintain 0.05 ~ 0.15mm gap, wear small, long life 2, stuffing box only by the suction pressure less leakage 3, and three Screw pump compared to the impurities are not sensitive Performance parameters: 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 can not be greater than 1500mm² / s Applications: For lubricating oil, grease, crude oil, asphalt, fuel oil and other high viscosity oil Three screw pump structure: By an active screw and two Engaged with the driven screw features: 1, the active screw directly driven driven screw, no gear drive, 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 can get high pressure 4, should not be transported with more than 600μm solid impurities in liquid 5, high-speed operation, is a small high-flow pump, high volumetric efficiency 6, box only with inhalation pressure , Leakage less performance parameters: pressure up to 70 MPa, flow up to 2000m³ / h. Suitable viscosity of 5 ~ 250 mm ² / s media Applications: Suitable for conveying lubricants, heavy oil, light oil and crude oil. Can also be used for glycerol and viscose and other highly viscous liquid delivery