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过程工程学报 ›› 2022, Vol. 22 ›› Issue (12): 1666-1675.DOI: 10.12034/j.issn.1009-606X.221438

• 研究论文 • 上一篇    下一篇

输油转子泵啮合间隙与转子叶数对泵性能影响规律研究

李琴*， 王慧， 黄志强， 马亚超
  

  1. 西南石油大学机电工程学院，四川 成都 610500
  • 收稿日期:2021-12-27 修回日期:2022-02-23 出版日期:2022-12-28 发布日期:2022-12-30
  • 通讯作者: 李琴 s3457885907@163.com

Research on influence of meshing clearance and number of rotor blades on pump performance

Qin LI*,  Hui WANG,  Zhiqiang HUANG,  Yachao MA   

  1. School of Mechanical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2021-12-27 Revised:2022-02-23 Online:2022-12-28 Published:2022-12-30

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摘要： 为了提高输油转子泵腔内部流动稳定性，同时提高泵的容积效率，建立了5种啮合间隙、3种转子叶数的输油转子泵模型进行对比分析。基于动网格技术和SST κ-ω湍流模型对输油转子泵腔内部进行数值模拟，并通过试验验证了研究方法的可行性，分别研究了啮合间隙、转子叶数对输油转子泵性能影响规律，并对输油转子泵的啮合间隙、转子叶数进行了优化设计。结果表明，啮合间隙从0.1 mm增至0.3 mm，2叶输油转子泵腔内高速流动区域扩大，转子腔内漩涡强度增大，泵腔内流体流动的平稳性和容积效率降低；转子叶数由2增加为4，转子腔内压力变化的多样性增加，3叶转子泵腔内流体流动最平稳。优化设计的输油转子泵腔内流动平稳性得到提高，同时容积效率提高了2.1%，能更好地满足油田输油的需要。

关键词: 输油转子泵, 啮合间隙, 转子叶数, 数值模拟, 容积效率

Abstract: In recent years, the demand for oil has increased year by year. In petroleum engineering, oil transportation is an important process. As an important power equipment for oil transportation in the oil field, the oil rotary pump has the advantages of a wide range of medium viscosity and strong self-absorption, but the fluid flow in the rotary pump cavity is not stable. In order to further improve the performance of the oil rotary pump, numerical simulations by the Fluent software were carried out on oil transfer rotor pumps with 5 meshing clearances and 3 rotor blade numbers. The influence of meshing clearance and rotor blade numbers on the performance of oil transfer rotor pumps was analyzed. The results showed that as the meshing gap increases from 0.1 mm to 0.3 mm, the high-speed flow area in the cavity of the 2-blade oil delivery rotor pump was enlarged, the vortex intensity in the rotor cavity increased, and the smoothness and volumetric efficiency of fluid flow in the pump cavity decreasd. The number of blades increased from 2 blades to 4 blades, the variety of pressure changes in the rotor cavity increased, the fluid flow stability in the rotor pump cavity was improved, and the fluid flow in the 3-leaf rotor pump cavity was the most stable. After the optimized design, the smoothness of the flow in the cavity of the oil transfer rotor pump was improved, and the volumetric efficiency increased by 2.1%, which can better meet the needs of oil transportation in the oil field, and can provide a reference for the further optimization of the oil transfer rotor pump.

Key words: Oil rotor pump, Meshing clearance, Rotational cotyledon number, Numerical Simulation, Volumetric efficiency ?