Importance of Labyrinth Seal Through-Flow Deflection for Enlarging Clearance Without Increasing Leakage

Rhode, D. L.; Guidry, M. J.

doi:10.1080/10402009308983186

Cited by 3 publications

(1 citation statement)

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“…Zhu [ 6 ] used the laminar flow model to analyze the flow in the labyrinth spiral and obtained the plane flow solution and the spatial flow solution of the oblique section in the honeycomb body. In addition, some researchers have also conducted theoretical analysis and experimental research on the labyrinth seal structure [ 7 , 8 , 9 ]. These analysis results all showed that the labyrinth spiral structure can produce a greater pumping pressure at high speeds.…”

Section: Introductionmentioning

confidence: 99%

Performance Research and Structure Optimization of Labyrinth Screw Pump

Rong

Zhu

Hu³

2021

Micromachines

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The labyrinth screw pump is a new type of low-flow rotor pump with a simple structure and good sealing performance. It is suitable for the transport of high-viscosity, high-gas-content, and particle-containing media. In this study, a rectangular labyrinth screw pump was used as the research object. The effect of the medium viscosity on the performance of the labyrinth pump was studied through numerical simulations, and the correctness of the simulation method was verified using existing test data. The efficiency and head of the labyrinth screw pump were selected as the optimization objectives, and the pump structural parameters were selected as the optimization parameters. A structural optimization model of the labyrinth screw pump based on response surface theory was established. The structural parameters of the labyrinth pump were reasonably simplified through size correlations, and then parameter sensitivity analysis was performed to determine the important structural parameters that needed to be optimized. The OSFD (optimized space-filling design) was used to combine the optimized parameters and generate the sample space. The response surface theory was combined with a neural network prediction model and a multi-objective genetic algorithm to perform optimization calculations. The results showed that there was an interactive influence between the structural parameters of the stator and rotor of the labyrinth screw pump. Compared with the original model, the optimized model pump had an efficiency increase of 13.55% and a lift increase of 19.53% when conveying a medium with a viscosity of 133 cp.

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Section: Introductionmentioning

confidence: 99%

Performance Research and Structure Optimization of Labyrinth Screw Pump

Rong

Zhu

Hu³

2021

Micromachines

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Computational and Experimental Investigations of Straight-Through Labyrinth Seals

Prasad

V.S.Manavalan

Rao

1997

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration

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Computational and experimental investigations are carried out to estimate leakage flow rate in a static straight-through labyrinth seal. Tests were conducted over a range of pressure ratios, varying from 1.003 to 1.897, for three clearance values of 0.2, 0.36 and 0.6 mm respectively. The measured values of leakage flow parameter are corroborated with the results obtained from the simulations using FLUENT computer package. The agreement was within 8.6%. The flow details, e.g., the stream line pattern, velocity vectors, static pressure and turbulent kinetic energy in a typical seal passage, are presented.

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