目的 探究大排量柱塞泵滑靴副因底面尺寸大的特点所产生的不同于常规柱塞泵滑靴副的摩擦学性能。方法 首先，在考虑大底面滑靴高速旋转时形成线速度差的基础上，结合热楔效应以及热传导关系，建立一种在剩余压紧力状态下大排量柱塞泵滑靴副摩擦力的数学模型。其次，仿真分析柱塞腔压力、主轴转速以及油液温度对滑靴副摩擦力的影响。最后，搭建滑靴副摩擦力测试装置，并测量滑靴副所受摩擦力，验证所建立的滑靴副摩擦力数学模型的准确性。结果 滑靴副的总摩擦力由黏性摩擦力和犁沟力2部分组成。随着转速的升高，滑靴副的总摩擦力会降低，犁沟力的占比逐渐增大，当转速由800 r/min上升至1 800 r/min时，犁沟力所占比例由3.4%上升至11.9%。随着压力的升高，滑靴副的总摩擦力上升，犁沟力所占比例增大，当压力由3 MPa上升至9 MPa时，犁沟力所占比例由0%上升至21.5%。随着油液温度的升高，滑靴副的总摩擦力上升，犁沟力所占比例增大，当油温由25 ℃上升至55 ℃时，犁沟力所占比例由4.0%上升至17.1%。结论 研究揭示了黏性摩擦力在滑靴副所受摩擦力中的主导作用和犁沟力对摩擦力变化趋势的影响作用，仿真和试验结果的一致性表明所建立的数学模型能够准确描述大排量柱塞泵滑靴副摩擦力影响因素和变化规律。

As the most complex friction pair in the movement mechanism and working condition of large displacement piston pump (LDPP), the friction characteristics of the slipper pair have an important impact on the overall performance of the LDPP. Therefore, the research on the friction characteristics of slipper pair of LDPP has become a hot and difficult issue in the industry. Many experts and scholars have conducted in-depth research on the friction related characteristics of slipper pair. However, due to the test conditions, the research on the friction and wear of slipper pair mainly focuses on the torque loss and power loss caused by the friction of slipper pair of small and medium displacement piston pumps. The slipper pair of LDPP has a large area at the bottom of the slipper, so when the slipper rotates at a high speed, a linear velocity difference will be formed between the inner and outer positions of the slipper pair relative to the center of the swashplate. The cause and change rule of the friction of the slipper pair are different from those of the slipper pair of the small and medium displacement piston pump, while the generation and change rule of the friction of the slipper pair of the relevant LDPP are still lack of systematic analysis.