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Structural optimization design of small‑displacement submersible progressive cavity pumps based on transient flow field analysis
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Haiying ZU, Lingzhi FU, Weidong YE, Yongpeng LIU, Weiliang ZHANG
Fluid Machinery | 2025, 53(6) : 58 - 66
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Fluid Machinery | 2025, 53(6): 58-66
Structural optimization design of small‑displacement submersible progressive cavity pumps based on transient flow field analysis
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Haiying ZU, Lingzhi FU, Weidong YE, Yongpeng LIU, Weiliang ZHANG
Affiliations
  • School of Mechanical Science and Engineering，Northeast Petroleum University，Daqing 163318，China
Published: 2025-06-30 doi: 10.3969/j.issn.1005-0329.2025.06.008
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To address the low volumetric efficiency caused by significant leakage in small‑displacement submersible progressive cavity pumps，this study takes the GLB-20 pump as the research object.Using Ansys Fluent software，a fluid simulation model was constructed based on user‑defined functions（UDF） and dynamic mesh technology to simulate transient and steady‑state flow fields.The influence laws of structural parameters including eccentricity，stator lead，and clearance on flow velocity and leakage were investigated.Experimental validation of optimization results yielded the optimal design scheme.Results show the pump exhibits significant harmonic variation during operation，with flow pulsating twice per cycle matching the stator‑rotor lead ratio.Transient flow fields conform better to actual conditions than steady‑state fields.Clearance is the most critical factor affecting leakage and flow velocity：stator lead influences flow velocity more than eccentricity，while eccentricity affects leakage more than stator lead.Optimized parameters via Box-Behnken design （BBD） method are eccentricity 1.8 mm，stator lead 78 mm，clearance 0.3 mm.Leakage decreased by 12.7%，volumetric efficiency significantly improved，and flow stability enhanced.This research provides design basis for small‑displacement submersible progressive cavity pumps.

small‑displacement submersible progressive cavity pump  /  transient flow field  /  user‑defined functions（UDF）  /  BBD response surface methodology  /  structural optimization design
祖海英, 付灵芝, 叶卫东, 刘永鹏, 张维良. 基于瞬态流场分析的小排量潜油螺杆泵的结构优化设计. 流体机械, 2025 , 53 (6) : 58 -66 . DOI: 10.3969/j.issn.1005-0329.2025.06.008
Haiying ZU, Lingzhi FU, Weidong YE, Yongpeng LIU, Weiliang ZHANG. Structural optimization design of small‑displacement submersible progressive cavity pumps based on transient flow field analysis[J]. Fluid Machinery, 2025 , 53 (6) : 58 -66 . DOI: 10.3969/j.issn.1005-0329.2025.06.008
Appendix
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Year 2025 volume 53 Issue 6
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Article Info
doi: 10.3969/j.issn.1005-0329.2025.06.008
  • Receive Date：2024-11-03
  • Online Date：2026-10-20
  • Published：2025-06-30
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  • Received：2024-11-03
  • Revised：2025-03-26
Affiliations
    School of Mechanical Science and Engineering，Northeast Petroleum University，Daqing 163318，China
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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