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为了改善轴向柱塞泵滑靴副的耐磨损性能,建立了滑靴与斜盘摩擦副的瞬态热结构耦合模型,分析压力冲击条件下滑靴的表面温度、应力以及变形的变化规律.研究结果表明:某型轴向柱塞泵中滑靴温度随柱塞腔压力呈周期性变化,滑靴温度范围为45.5~49.8℃,且滑靴的最高温度出现在泵的吸排油过渡区.当滑靴处于泵的排油区时,滑靴的最大轴向应力为250MPa,集中在滑靴油腔与密封带之间的边缘区域.滑靴的轴向应力分层显著,引起滑靴的变形分化,其变形量为12.5~15μm,出现在滑靴的边缘.由于滑靴的输入热流密度增强磨粒的剪切力,加剧滑靴表面的微切削和挤压变形,导致滑靴表面出现条状剥落和凹坑磨损,呈现出黏着和磨粒磨损特征.
In order to improve the wear resistance of axial piston pump pair, the transient thermal structure coupling model between the sliding pair and the swashplate friction pair was established. The surface temperature, stress and deformation of the sliding shoe under pressure shock were analyzed. The results show that the temperature of the sliding shoe in a certain type of axial piston pump periodically changes with the pressure in the plunger. The temperature range of the sliding shoe is 45.5 ~ 49.8 ℃. The maximum temperature of the sliding shoe appears in the transition zone of the pump. When the shoe is in the discharge area of the pump, the maximum axial stress of the shoe is 250 MPa, which is concentrated in the edge area between the shoe oil chamber and the sealing tape. The axial stress of the shoe is significantly stratified, Deformation and differentiation, the deformation of 12.5 ~ 15μm, appeared in the edge of the slipper.Because the heat input density of the slipper increases the shear force of the abrasive particles, aggravating the micro-cutting slipper surface and extrusion deformation, resulting in slipper surface appears Bar-like flaking and crater wear, showing the characteristics of adhesive and abrasive wear.