中国机械工程 ›› 2025, Vol. 36 ›› Issue (11): 2525-2536.DOI: 10.3969/j.issn.1004-132X.2025.11.007

• 机械基础工程 • 上一篇    

轴向柱塞泵织构化柱塞副低压程润滑特性研究

罗刚1,2,3(), 何涛1,2,3(), 王传礼1,2,3, 赵凯平1,2,3, 郑浩1,2,3   

  1. 1.安徽理工大学煤炭无人化开采数智技术全国重点实验室, 淮南, 232001
    2.安徽理工大学机电工程学院, 淮南, 232001
    3.安徽理工大学矿山智能装备与技术安徽省重点实验室, 淮南, 232001
  • 收稿日期:2024-07-03 出版日期:2025-11-25 发布日期:2025-12-09
  • 通讯作者: 何涛
  • 作者简介:罗刚,男,1999年生,博士研究生。研究方向为流体传动与控制。E-mail:lg1469757460@163.com
    何涛*(通信作者),男,1987年生,副教授。研究方向为流体传动与控制、矿山智能装备与技术。E-mail:taoheaust@163.com
  • 基金资助:
    国家自然科学基金(52205041);安徽省高校优秀青年人才支持计划(gxyq2022017);矿山智能装备与技术安徽省重点实验室开放基金(ZKSYS202101);安徽省矿山智能技术与装备科研创新团队(2022AH010052);安徽省新时代育人质量工程项目(2023cxcysj087);安徽省新时代育人质量工程项目(2024xscx074)

Research on Lubrication Characteristics of Textured Piston-cylinder Pairs of Axial Piston Pumps under Low-pressure Stroke

Gang LUO1,2,3(), Tao HE1,2,3(), Chuanli WANG1,2,3, Kaiping ZHAO1,2,3, Hao ZHANG1,2,3   

  1. 1.State Key Laboratory of Digital and Intelligent Technology for Unmanned Coal Mining,Anhui University of Science and Technology,Huainan,Anhui,232001
    2.School of Mechatronics Engineering,Anhui University of Science and Technology,Huainan,Anhui,232001
    3.Anhui Key Laboratory of Mine Intelligent Equipment and Technology,Anhui University of Science and Technology,Huainan,Anhui,232001
  • Received:2024-07-03 Online:2025-11-25 Published:2025-12-09
  • Contact: Tao HE

摘要:

柱塞副的润滑状态是决定轴向柱塞泵使用寿命的关键,因此提出一种织构化柱塞副以降低低压程油膜的失效风险。针对柱塞副的支撑长度可变,基于动态节点网格建立了一种柱塞副织构化表面润滑模型。采用有限差分法对压力方程进行离散处理,通过油膜压力和偏心量的双层循环获取织构化表面的压力和膜厚分布,分析工况参数和织构参数对润滑特性的影响。研究结果表明:更大的织构半径和织构面积率对柱塞副的润滑减摩效果更好,减摩作用的影响顺序(从高至低)为:织构面积率,织构半径,织构深度;增大织构半径和减小织构深度均可增强油膜的承载能力,且30%的织构面积率具有更高的工况适应度;结合负载试验,织构化试件的摩擦因数较无织构时的摩擦因数最大降幅可达29.8%。研究结果可为轴向柱塞泵的摩擦学设计提供参考。

关键词: 轴向柱塞泵, 织构化柱塞副, 润滑特性, 低压程, 偏心量

Abstract:

The lubrication states of piston-cylinder pairs were the key to determining the service life of axial piston pumps. Therefore, a textured piston-cylinder pair was proposed to reduce the failure risk of oil film under low-pressure stroke. A textured lubrication model for piston-cylinder pairs was established based on a dynamic node mesh to address the variable support length of piston. Besides, the pressure equation was discretized by using a finite difference method, the pressure and thickness distribution of oil films were obtained by a double-layer cycle of film pressure and eccentricity. The influences of working parameters and texture parameters on lubrication characteristics were analyzed. The results show that the greater the texture radius and texture area ratio, the better the antifriction effectiveness, and the order of the effect in reducing friction(from high to low) is: texture area ratio, texture radius, texture depth. Both increasing the texture radius and decreasing the texture depth may enhance the bearing capacity of oil film, and a texture area ratio of 30% has higher adaptability. Combined with loading test, the maximum reduction in friction coefficient of textured specimen compared to that of non-textured specimen is as 29.8%. The results may provide some references for frictional design of axial piston pumps.

Key words: axial piston pump, textured piston-cylinder pair, lubrication characteristics, low-pressure stroke, eccentricity

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