| Citation: | GU J N，ZHANG X B，XIA T X，et al. Simulation and experimental research for overturning behavior of aviation plunger pump cylinder bodies[J]. Journal of Beijing University of Aeronautics and Astronautics，2026，52（5）：1666-1679 （in Chinese）
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The aviation plunger pump is the core of the aviation hydraulic system, and excessive overturning of its internal parts may cause the performance of the whole system to degrade and fail. How to improve the stability of the aviation plunger pump and reduce the overturning of the parts has been the key issue in the research of its high-pressure and high-speed development. The impact of outlet pressure and plunger pump speed on cylinder overturning was investigated in this article, which created a data-driven high-fidelity dynamics model from the viewpoint of cylinder vibration displacement. Then, an improvement measure to reduce the waist groove size of the distribution plate was proposed and verified through numerical simulation. The results show that reducing the size of the waist groove on the distribution plate can improve the overturning of the cylinder body. The revised model can reflect the actual tilting state, and the relative error with the experimental measurement results is within 5%. The research findings offer theoretical and experimental support for the reliable manufacturing of batch production, as well as research suggestions for the simulation and stability studies of aeronautical piston pumps.
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