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针对航空燃油柱塞泵滑靴副的动静压混合支承下的润滑问题,在建立滑靴副的运动学和动力学数学模型基础上,考虑静压支承与滑靴非规则的空间曲线运动特征所产生的动压润滑效应,建立动静压效应下的滑靴副混合润滑数学模型,并基于有限体积法进行了滑靴副的润滑特性仿真计算研究,分别对混合润滑机理下的油膜厚度变化规律,油膜压力分布影响因素和滑靴抗倾覆性能进行了仿真分析研究。仿真结果表明:动静压混合支承所得到的油膜厚度变化趋势更符合滑靴副实际的润滑状态;中心油膜厚度、滑靴最大倾斜角、转子转速主要对动压效应产生影响,而滑靴副进口压力即柱塞泵供油压力主要影响油膜的静压作用;提高滑靴的抗倾覆能力可通过增大滑靴底面工作半径或者减小滑靴中心油池半径来增强油膜的动压效应,抵消滑靴受到的倾覆力矩。
Aiming at the lubrication problems under the static and dynamic pressure mixed support of the slipper pair of the aviation fuel piston pump, based on the mathematical model of the kinematics and dynamics of the slipper pair, the non-regular spatial curve movement characteristics of the static pressure support and slipper are considered The dynamic pressure lubrication effect is established and the mathematical model of the slippery shoes deputy mixed lubrication under the static pressure and the static pressure effect is established. Based on the finite volume method, the lubrication performance of the slipper pair is simulated and studied. The influence factors of the oil film pressure distribution and the anti-overturning performance of the shoe are simulated and analyzed. The simulation results show that the change tendency of the oil film thickness obtained by hybrid support is more in line with the actual lubrication condition of the slipper pair. The thickness of the center oil film, the maximum tilt angle of the shoe, and the rotor speed mainly affect the dynamic pressure effect, The pressure that the plunger pump oil pressure mainly affects the static pressure of the oil film; improve the anti-tipping ability of the shoe by increasing the working radius of the bottom of the shoe or reduce the center radius of the shoe to enhance the dynamic pressure effect of the oil film, Slipper moment of overturn.