As the power source of hydraulic system, hydraulic pump determines the reliability and life of the electro-hydraulic dynamic control and actuation system in an aircraft. For hydraulic pump, higher rotation speed and larger load pressure means higher power density, however, as well as stronger multi-field coupling effect and larger stress deformation and thermal deformation of the key rotating and reciprocating components. Research on structural deformation and optimal design of rotating and reciprocating components based on multi-field coupling design theory and method is necessary. Taking slipper-piston component in an aerial axial piston pump as research target, this paper analyzed thermal-structure-friction coupling characteristics of slipper-piston component. And on this basis, the simulations of stress and temperature distribution of slipper-piston have been accomplished through COMSOL software. The stress concentration areas and high-temperature areas in slipper-piston component were marked and analyzed to provide directions for the further structural optimization and design.
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