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Raising rotational speed is an effective way to improve the power density of axial piston pumps. However, cavitation tends to happen in the pump’s cylinder chambers at high rotational speeds, which limits the speed increase for a greater power density. The speed-dependent centrifugal effect of fluid is considered as one of important factors influencing this cavitation occurrence. Therefore, this paper...
The electro-hydrostatic actuator (EHA) pump of aircraft is usually characterized as high speed for improved power density. High-speed condition leads to a considerable tilting inertia moment acting on the cylinder block, which has a significant effect on the cylinder block balance. Therefore, the cylinder block spline is required to be designed properly to achieve the cylinder block balance at high...
The speed of Electro-Hydrostatic Actuator pump can recently reach 20,000 rpm and the cylinder block within such high-speed pump is more likely to tilt away from the valve plate, which results in wedge-shape oil film between cylinder block and valve plate and thus increase in leakage flow. In order to realize the cylinder block balance at high speed, more attentions should be given to the dimensional...
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