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<p>The noise optimization of rotor oil pump assembly was studied to solve the noise of an engine in its working speeds. By analysing the noise mechanism of the rotor oil pump, the noise spectrum obtained by engine bench test was used to analyse the noise characteristics and sources. At the same time, the fluid dynamics of the oil pump was analysed in Pumplinx software, and the distribution of oil pressure in the oil pump was obtained through the SIMPLEC algorithm and the RNG <i>k-ε</i> turbulence model. Aiming at noise reduction, the structure of the rotor oil pump assembly was optimized for the prominent acoustic defects. The pressure in the trapped oil area was reduced by adding an oil discharge trough. The howling of the engine has been solved. The results show that the first order vibration speed of the optimized oil pump is reduced, and the maximum pressure in the oil trapped area is reduced by about 56% on average. Also, the order noise is obviously improved and the background broadband energy is reduced. Finally, the maximum and average value of total sound pressure level is reduced by 2.1 dB and 3.2 dB, respectively. The optimization scheme effectively improves the acoustic characteristics of the oil pump assembly and provides a thought for the acoustic optimization of similar structures.</p>

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Optimization Design of an Engine Rotor Oil Pump Based on CFD and Noise Analysis

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Xi Fu,
  • Wenzhao Yang,
  • Lina Zhang,
  • Quan Liu,
  • Xiangming Wang,
  • Zhaoming Yin,
  • Qiang Zhan

摘要

The noise optimization of rotor oil pump assembly was studied to solve the noise of an engine in its working speeds. By analysing the noise mechanism of the rotor oil pump, the noise spectrum obtained by engine bench test was used to analyse the noise characteristics and sources. At the same time, the fluid dynamics of the oil pump was analysed in Pumplinx software, and the distribution of oil pressure in the oil pump was obtained through the SIMPLEC algorithm and the RNG k-ε turbulence model. Aiming at noise reduction, the structure of the rotor oil pump assembly was optimized for the prominent acoustic defects. The pressure in the trapped oil area was reduced by adding an oil discharge trough. The howling of the engine has been solved. The results show that the first order vibration speed of the optimized oil pump is reduced, and the maximum pressure in the oil trapped area is reduced by about 56% on average. Also, the order noise is obviously improved and the background broadband energy is reduced. Finally, the maximum and average value of total sound pressure level is reduced by 2.1 dB and 3.2 dB, respectively. The optimization scheme effectively improves the acoustic characteristics of the oil pump assembly and provides a thought for the acoustic optimization of similar structures.