《Table 1 Contrast between simulation and experimental results》

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《二维活塞泵用滚子-凸轮轨道机构的建模和验证（英文）》

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Through simulation and experiment，the flow and revolving speed ripples of the 2D tandem pump at revolving speeds varying from 500 r/min to 5000 r/min are shown and compared with the flow characteristics of the traditional pump with seven pistons in Table 1.The fluctuation of the flow curve depending on experimental data is obvious，but after the flow curve is filtered from clutter，it is close to zero.Although the curve still contains some influence from the ripples of revolving speed，it shows that the structural flow ripple is eliminated in the 2D pump.As Table 1 shows，about 4%of the flow ripple is coming from the structural ripple of the traditional seven-piston pump，and the rest is from reverse flow.The tendencies of the flow ripples after filtration and the simulated flow ripples in the tandem pump are opposite and are mainly caused by other factors.The experimental flow ripple is mainly determined by the ripple from the motor，and the motor runs more steadily as its speed increases，while the revolving speed in the simulated model is completely stable.The simulated flow ripple is mainly decided by reverse flow，and cannot be detected on the test bench of the experimental prototype.