Comparative analysis on relief grooves of high-speed and high-pressure aeroengine fuel gear pumps

Guoning QI; Baohai WU; Jiangfeng FU

doi:10.7527/S1000-6893.2023.29666

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2024 , Vol. 45 >Issue 5: 529666 - 529666

DOI: https://doi.org/10.7527/S1000-6893.2023.29666

Articles

Comparative analysis on relief grooves of high-speed and high-pressure aeroengine fuel gear pumps

Guoning QI ,
Baohai WU ,
Jiangfeng FU

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^1.AECC Xi’an Engine Control Technology Co. Ltd. ，Xi’an 710077，China
^2.Key Laboratory of High-Performance Manufacturing for Aero Engine，Ministry of Industry and Information Technology，Northwestern Polytechnical University，Xi’an 710072，China
^3.Engineering Research Center of Advanced Manufacturing Technology for Aero Engine，Ministry of Education，Northwestern Polytechnical University，Xi’an 710072，China
^4.School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China

E-mail： wubaohai@nwpu.edu.cn

Received date: 2023-09-28

Revised date: 2023-10-08

Accepted date: 2023-10-18

Online published: 2023-11-01

Supported by

National Science and Technology Major Project(J2019-V-0016-0111);Science Center for Gas Turbine Project(P2022-B-V-003-001);Defense Industrial Technology Development Program(JCKY2022607C002);Universities Joint Key Projects of Key Research and Development Plan of Shaanxi Province(2021GXLH-01-16);Industry University Research Cooperation Project of AECC(HFZL2022CXY013)

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Abstract

The relief groove is the most effective measure to alleviate oil trapping of gear pumps； therefore， its design directly affects the working efficiency and service life of the gear pump. This paper presents a performance analysis method for relief grooves based on computational fluid dynamics. A comparative study was conducted to evaluate the performance of different structural forms of relief grooves， focusing on technical indicators such as trapped oil pressure， gas volume fraction， outlet flow rate， and the flow rate non-uniformity coefficient. The results show that the relief groove F， with a flow non-uniformity of only 5.25% and a trapped oil pressure peak of 18 MPa， outperforms the rectangular， circular， and unloading slot E in terms of overall performance， exhibiting advantages of low trapped oil pressure， high volumetric efficiency， and high flow quality. These characteristics make it well-suited for the design of high-speed and high-pressure fuel gear pumps. In addition， increasing the size of the relief groove and positioning it towards the low-pressure chamber can reduce cavitation， oil entrapment， and flow pulsation. Designing the new unloading slot F with these factors in mind can improve its overall performance.

Key words： aeroengines; fuel gear pumps; relief grooves; trapped oil; cavitation

Cite this article

Guoning QI , Baohai WU , Jiangfeng FU . Comparative analysis on relief grooves of high-speed and high-pressure aeroengine fuel gear pumps[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(5) : 529666 -529666 . DOI: 10.7527/S1000-6893.2023.29666

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