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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (12): 426037-426037.doi: 10.7527/S1000-6893.2021.26037

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Matching relationship between structural parameters and operating parameters of oil scoop blade for high-speed bearing with under-race lubrication

LYU Yaguo1, JIANG Le1, GAO Xiaoguo2, LIU Zhenxia1, ZHU Pengfei1, GAO Wenjun1   

  1. 1. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China;
    2. Key laboratory of Power Transmission Technology on Aero-engine, Aero Engine Corporation of China, Shenyang 110015, China
  • Received:2021-07-02 Revised:2021-07-29 Published:2021-09-06

Abstract: To study the matching relationship between the structural parameters and the working condition parameters of the oil scoop blade, the effects of the radius difference of the oil scoop blade, the injection angle of the oil jet nozzle, the rotating speed of the oil scoop, and the oil velocity on the oil loss angle and oil capture efficiency are studied by theoretical analysis and numerical simulation. The results show that the impact point position of the oil jet impinging on the outer contour of the oil scoop blade can be changed by adjusting the injection angle and the radius difference of the oil scoop blade. The former has less influence, and the latter can reduce the impact splash amount of the lubricant oil at low oil jet velocity. Considering the influence of wind resistance, the oil loss angle obtained is less than the corresponding theoretical analysis result. The oil capture efficiency can be increased by more than 3.0% by increasing the radius difference of the oil scoop blade at the rotating speed of 11 000 r/min. Adjusting the radius difference of the oil scoop blade within a certain rotating speed range can reduce the impact splash amount of the lubricant oil and improve the oil capture efficiency.

Key words: radial oil scoop, radius difference, injection angle, oil-gas flow, oil capture efficiency

CLC Number: