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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...
Compared with hydraulic pump used in industry, aerial axial piston pump has quite different working conditions, which are mainly reflected in larger load pressure, higher rotational speed and wider range of working temperature. Research on energy-loss and bearing characteristics of oil film of friction pair under these working conditions is necessary. Slipper pair of an aerial axial piston pump was...
In this paper, addressed to the problems existed in the squeeze film damper (SFD) based on the dynamic pressure bearing in the rotational machinery, a new type of the hybrid squeeze film damper (HSFD) with piezoelectric crystal electrohydraulic active control is proposed. It is composed of dynamic pressure bearing and static pressure bearing. The effectiveness of HSFD is analyzed theoretically, and...
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