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An embedded spring-loaded vane design enabling high pressure operation at ultra-low speed for a balanced vane pump
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DOI：10.1016/j.mechatronics.2026.103570.png)
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Abstract
En 中文
To satisfy the ultra-low idle speed demands of electric mobile machines, the pumps must maintain stable operation under low-speed and high-pressure conditions. However, conventional pin-loaded vane pumps fail to maintain reliable operation under such conditions, suffering from degraded volumetric efficiency and severe internal leakage. To address this, this paper proposes an embedded spring-loaded vane structure to enhance the volumetric efficiency of balanced vane pumps under ultra-low-speed (below 500 rpm) and high-pressure conditions. A comprehensive lumped-parameter simulation model, integrating kinematics, fluid dynamics, force analysis, and elasto-hydrodynamic lubrication, was developed to systematically compare the performance of ESL and conventional PL vanes. Both numerical and experimental results quantitatively demonstrate that the ESL vane achieves higher volumetric efficiency than the PL vane under target low-speed and high-pressure conditions. Furthermore, at an extreme condition of 100 rpm and 21 MPa, where the PL structure completely fails due to vane detachment, the ESL structure successfully maintains a stable and reliable flow output.
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