As the trend in pump design is gradually moving towards high efficiency and low noise (Yang and Pan, 2015), it is necessary to keep both pressure pulsation and swash plate vibration as low as possible. High pressure pulsation and swash plate vibration cause low efficiency and high noise, even failure of the aircraft pump and the hydraulic system. High rotation speed and high discharge pressure are two of the most important characteristics of such pumps, and are liable to lead to high pressure pulsation and swash plate vibration. The pressure-compensated axial-piston pump is one of the key components of aircraft hydraulic systems.
#TEAM Z 2 PIECE LS MOTOR PLATE FULL#
The full FSIs model is much more accurate in predicting the vibration of the swash plate and the pulsation of the discharge pressure than the non FSI model. The full FSIs simulation shows that the swash plate vibration is strongly influenced by the pressure pulsation through the control actuator mechanism (FSI-2) and the control valve mechanism (FSI-3), but the non FSI model does not show the same result.
The results of the two models show that the discharge pressure pulsation mostly depends on the kinematic relations of the piston slipper-shoe units (FSI-1), and is almost isolated from the swash plate vibration. The numerical simulation results of the forces on the swash plate and the flow rate of the outlet chamber are presented and compared. The simulation results of the discharge pressures at different rotation speeds in the synthesized pump model and experiments show good agreement.
Models of the swash plate piston pumps with three FSIs (named full FSIs and non FSI) are given. In this paper, dynamic analyses of the swash plate vibration and pressure pulsation of an aircraft piston pump based on fluid-structure interactions (FSIs) are presented.
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