Abstract

In order to obtain the optimum structure of the lining pump under the condition of fluid thermosetting coupling, according to the given design parameters, the structural parameters of the pump were calculated, the three-dimensional geometric model was established, and the flow field analysis was carried out by CFD; the inlet angle βb1, outlet angle βb2, wrap angle φ, inlet diameter D1, and outlet diameter D2 of the impeller were selected as the five factors to design orthogonal experiment, and the results were analyzed by range analysis; then, the efficiency and cavitation allowance were obtained as combined parameters under the evaluation index. The displacement deformation and stress distribution under the condition of the coupling field were obtained by the fluid-solid coupling analysis, and the orthogonal experimental table of the impeller structure of the lining plastic pump was established, and then the orthogonal experimental results are analyzed to obtain the influence of each structural parameter under the condition of each evaluation index and the optimum combination parameters. The influence situation and the best combination parameters under the condition of evaluation index, taking the minimum displacement deformation and minimum stress of impeller as the reference index, and the optimum combination parameters under the condition of minimum displacement and stress were as follows: the inlet diameter D1 was 76 mm, the outlet diameter D2 was 252 mm, the inlet angle was 26°, the outlet angle was 24°, and the wrap angle was 115°. Finally, the 3D printing technology was used to print out the physical model to the hydraulic performance experiment verification.

Highlights

  • Pumps are widely used and undertake a very important position in the fields such as agriculture and industry

  • According to the evaluation index, the optimal level combination was A3B1C3D4E4, that is, the inlet diameter D1 was 76 mm, outlet diameter D2 was 252 mm, the inlet angle was 26°, the outlet angle was 32°, the wrap angle was 115°, while the total displacement of the lining plastic pump was minimum, which means that the lining plastic pump under this parameter had the minimum deformation

  • According to the evaluation index, the optimal level combination was A3B1C3D2E2, that is, the inlet diameter D1 was 76 mm, outlet diameter D2 was 252 mm, the inlet angle was 26°, the outlet angle was 24°, and the wrap angle was 105°, while the stress of the lining plastic pump was minimum, which showed that the lining plastic pump under this parameter has minimal stresses

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Summary

Introduction

Pumps are widely used and undertake a very important position in the fields such as agriculture and industry. At present, when most scholars at home and abroad conducting research [8, 9], the conduction of CFD internal flow field analysis and fluid-thermal-structure interaction on the plastic lined pump has been neglected [10, 11]. In this paper, using CFD to analyze the flow field of the lining plastic pump, through orthogonal experiment and range analysis, it could be concluded that the efficiency and cavitation allowance were taken as the combined parameters under the evaluation index. Taking the minimum displacement deformation and minimum stress of impeller as the reference index, the combined weighted scoring method and Taguchi algorithm were used to optimize the parameters of the thermal-solid coupling analysis of the Advances in Materials Science and Engineering lining plastic pump flow, and the optimum combination parameters under the condition of minimum displacement and stress were obtained

Meshing and Flow Field Simulation
Orthogonal Experiment and Range Analysis
1: D1 2: D2 3: βb1
4.10.2. Statistics of Internal Tables
Performance Test of Lining Plastic Pump
Conclusion
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