| Analysis and design of an axial piston water-pump with piston valve
Luo Xiaohui*, Niu Zihua, Shi Zhaocun, Hu Junhua
The Journal of Mechanical Science and Technology, vol. 25, no. 2, pp.371-378, 2011
Abstract : In this paper, we present a novel axial piston water-pump with piston valve, which carries out the flow distribution to drain and sucks
water by the interaction of each piston. This novel water-pump could achieve change in-phase between flow rate and the passage areas of
the intake and outlet ports. In order to completely achieve the in-phase change, the pressure that is assigned a fixed value in the piston
chamber is optimized. On these grounds, the optimum shapes of the intake and outlet ports have been found to be rectangular according
to theoretical analysis. The simulation results indicated that the optimum intake and outlet port shapes keeps the pressure in the piston
chamber constant, and there is almost no pressure surge except for a very small pressure wave in the piston chamber. Finally, the test of
model machine showed that the pressures of the intake and outlet port are very steady, but the leakage is large and the volumetric efficiency
is 74.7%.
Keyword : Axial piston water-pump; Optimum design; Piston valve; Pressure surge |
