Modeling and Experimental Validation of Lubrication Characteristics of Spherical Valve-plate Pairs with Conical Cylinder Block

doi:10.3969/j.issn.1004-132X.2022.20.004

Abstract

Abstract: The lubrication characteristics of oil film of valve-plate pairs were of great significance for reliable operations of axial piston pumps. A simulation model was developed for oil film lubrication characteristics of spherical valve-plate pairs with conical cylinder block， and the effectiveness of the model was validated using experimental tests. First， the forces acting on conical cylinder blocks were analyzed， and the forces acting on cylinder blocks generated by piston-slipper assemblies were obtained by analyzing the kinematics and dynamics of piston-slipper assemblies. Second， the oil film carrying forces were obtained by analyzing the thickness and pressure distributions of oil films in spherical valve-plate pairs. Third， the oil films were discretized using finite volume method， and the oil film lubrication characteristics of spherical valve-plate pairs and the equation of motion of conical cylinder blocks were numerically solved using Newton iterative method. Last， the high-pressure steady-state tests and the surface profile scanning tests were performed， the morphologies of spherical valve plates with different steady-state test durations were obtained， the spherical valve-plate wear profile and the simulated oil film thickness and pressure distributions were compared. Results show that the simulated thick oil film area is in consistence with spherical valve-plate main wear areas， indicating that the oil film lubrication model of spherical valve-plate pairs with conical cylinder block is effective.

Key words: axial piston pump, conical cylinder block, spherical valve-plate pair, lubrication characteristic

摘要： 配流副油膜的润滑特性对轴向柱塞泵的可靠运行有重要影响。建立了锥形缸体球面配流副油膜润滑特性仿真模型，并通过试验验证了模型的有效性。对锥形缸体进行受力分析，通过对柱塞滑靴组件运动学和受力的分析，求解得到柱塞滑靴组件对锥形缸体的作用力；通过对球面配流副油膜厚度分布和压力分布的分析，求解得到球面配流副对锥形缸体的油膜支承力；采用有限容积法对油膜进行离散化处理，通过牛顿迭代法数值求解球面配流副油膜润滑特性和锥形缸体运动方程；开展轴向柱塞泵高压稳态试验和轮廓扫描试验，获得不同稳态试验时长的球面配流盘磨损形貌，对比球面配流盘磨损轮廓与仿真得到的油膜厚度分布和压力分布。研究结果表明，仿真得到的油膜厚度较小区域与配流盘主要磨损区域相近，验证了锥形缸体球面配流副油膜润滑模型的有效性。

关键词: 轴向柱塞泵, 锥形缸体, 球面配流副, 润滑特性

CLC Number:

TH137.51

YE Shaogan, LAI Weiqun, HOU Liang, BU Xiangjian. Modeling and Experimental Validation of Lubrication Characteristics of Spherical Valve-plate Pairs with Conical Cylinder Block[J]. China Mechanical Engineering, 2022, 33(20): 2420-2428，2436.

叶绍干, 赖伟群, 侯亮, 卜祥建. 锥形缸体球面配流副润滑特性建模及试验验证[J]. 中国机械工程, 2022, 33(20): 2420-2428，2436.

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