基于流场分析的液压泵磨损退化研究  

Research on Wear Degradation Identification Method of Plunger Pump Based on Flow Field Analysis

作　　者：齐建军 郭锐[2] 薛勇 王黎沁 金光俊 石月 QI Jian-jun;GUO Rui;XUE Yong;WANG Li-qin;JIN Guang-jun;SHI Yue(Beijing Special Engineering Design Institution,Beijing 100028,China;Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao 066004,China;Qinhuangdao Yanda Yihua Electromechanical Engineering Technology Research Institute Co.,Ltd.,Qinhuangdao 066004,China)

机构地区：[1]北京特种工程设计研究院,北京100028 [2]燕山大学河北省重型机械流体动力传输与控制重点实验室,河北秦皇岛066004 [3]秦皇岛燕大一华机电工程技术研究院有限公司,河北秦皇岛066004

出　　处：《液压气动与密封》2022年第4期25-32,共8页Hydraulics Pneumatics & Seals

基　　金：国家自然科学基金(52075469);国家自然科学基金(12173054)。

摘　　要：轴向柱塞泵是液压系统的动力元件,其健康状态影响着整个液压系统的性能。磨损是轴向柱塞泵典型的渐进性故障,因此该文针对轴向,在磨损加速寿命实验的基础上,提出了一种基于流场分析轴向柱塞泵磨损退化状态识别方法。首先,对轴向柱塞泵配流副的磨损泄漏机理进行理论分析,通过有限元法计算得到配流副油膜厚度,将其作为柱塞泵内部流场模型的边界条件;其次,采用动态网格技术对轴向柱塞泵内部流场进行仿真模拟,从不同压力、转速、磨损间隙这三个角度,对柱塞泵性能退化进行仿真分析;最后,通过实验对仿真结果进行了验证。结果表明,该方法能够识别六种被试样本的磨损退化状态。研究结果不仅为磨损退化的研究提供了解决方案同时也为柱塞泵的预测性维护提供了强有力的技术支持。Axial plunger pump is the power component in the hydraulic system,and its state affects the performance of the whole hydraulic system.Wear is a typical progressive failure of axial plunger pump.Therefore,aiming at the wear failure of port pair,one of the three friction pairs of axial plunger pump,based on the wear accelerated life experiment,a wear degradation state identification method of axial plunger pump based on flow field analysis is proposed in this paper.Firstly,the wear and leakage mechanism of the distribution pair of axial plunger pump is analyzed theoretically,and the oil film thickness of the distribution pair is calculated by finite element method,which is used as the boundary condition of the internal flow field model of plunger pump;Secondly,the internal flow field of axial plunger pump is simulated by using dynamic grid technology,and the performance degradation of plunger pump is simulated and analyzed from the perspectives of different pressure,speed and wear clearance;Finally,the simulation results are verified by experiments.The results show that this method can identify the wear degradation state of six tested samples.The research results not only provide a solution for the research of wear degradation,but also provide strong technical support for the predictive maintenance of plunger pump.

关 键 词：柱塞泵 状态识别 流场分析 磨损实验 

分 类 号：TH137[机械工程—机械制造及自动化]