| Citation: | ZHAO Kaiping, HE Tao, WANG Chuanli, et al. Lubrication characteristics of slipper pair of piston pump under the disturbance of valve distribution pressure pulsation[J]. Journal of Aerospace Power, 2023, 38（6）：1432-1445 doi: 10.13224/j.cnki.jasp.20220441
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The stress state and oil film dynamic boundary value of slipper of valve distribution axial piston pump are different from those of end face distribution pump. In order to study its lubrication characteristics, a coupling model for slipper pair working condition simulation and numerical analysis applied to valve distribution axial piston pump was established to analyze the effects of plunger motion frequency, system load and different graded constant flows on the lubrication characteristics of slipper pair. The results showed that the sliding shoe pair of valve distribution overturned mainly in the direction of friction torque, and eccentric wear was more likely to occur in the transition period from high pressure zone to low pressure zone and in the low pressure zone; the increase of the plunger movement frequency could reduce the risk of overturning and eccentric wear of the slipper, but it may also reduce the stability of the slipper pair; with the increase of the system load, the oil film thickness decreased, and the overturning angle of the slipper in the high pressure area decreased, while the overturning angle of the slipper in the low pressure area increased; under different grading and constant flow rates, when the number of plungers was greater than 3, the slippers were not easy to overturn when the odd number of plungers were combined, while the slippers were easy to overturn and wear when the even number of plungers were combined, and the pressure change range in the high and low pressure zones increased.
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