Numerical Simulation And Performance Analysis Of Labyrinth Screw Pump With Separated Structure

Labyrinth screw pump is a kind of low flow and high hydraulic Lift fluid machinery, which is available for single liquid transportation, gas-liquid mixed transportation and solid-liquid mixed transportation. The screw threads of stator and rotor are machined on socket or spindle directly, which is a bit of difficult, especially for stator thread. In this paper, a new structure of LSP is put forward to solve this problem, whose stator and rotor are separated to a series of screw rings. The main contents are as follows:(1)Separated structure designed the LSP, whose diameter is80mm and screw length is180mm.Given the simple structure drawing and assembly drawing, and then,format named the new structures.(2) Analysis the internal flow of LSP and decide simulated model: computational fluid dynamics software Fluent, RNG k-ε turbulence model, solver based on pressure, SIMPLEC algorithm, second order upwind interpolation, MRF, pressure inlet and velocity outlet.(3)Numerical simulated the rotor separated LSP, stator separated LSP, rotor and stator all separated LSP, original LSP respectively, and then compare the hydraulic performance. The results show that stator separated LSP is advantaged in hydraulic Lift while rotor separated LSP is in efficiency. There is no pressure increase in ring slot, but there is pressure surge in initial location of screw.(4) Numerical simulated a complex lead LSP with separated structure, and contrastive analysis the numerical simulation results and experimental dates, it shows that the simulated date which is corrected is approximately equal experimental date.(5)Simulation calculate the separated LSP with complex thread counts, complex diameter and complex tooth, analysis the Lift and efficiency variations qualitatively.