Prediction Method of Performance of Intelligent Hydraulic Components Based on Lubrication Mechanism

Abstract

Abstract: The hydraulic pump was taken as an example, and the slipper pair, the weakest link were the research object, and the wear of slipper was used as the causes of performance degradation. The oil film lubrication characteristic equations of the shoe wear processes were established by combining the mathematical description equation of the wear of slipper, the leakage flow formula and the instantaneous change model of piston chamber pressure. The failure mechanism of hydraulic pump performance was revealed and the failure critical points were calculated. The performance degradation states of hydraulic pump were divided into different regions, and the variation law of slipper wear, oil film lubrication characteristic parameters and performance degradation parameters of the hydraulic pump in different states were analyzed, a performance prediction model was established. The correctness of the theoretical model was verified by simulation analyses, and the validity and accuracy of the prediction model were verified by hydraulic pump performance tests. The results show that the built model may accurately predict hydraulic pump performance.

Key words: performance prediction, hydraulic pump, slipper pair, wear of slipper, lubrication characteristic of oil film

摘要： 以液压泵为例，以其最为薄弱的环节——滑靴副为研究对象，并以滑靴磨损作为性能退化原因，结合滑靴磨损数学描述方程、泄漏流量公式和柱塞腔压力瞬时变化模型，建立了滑靴磨损过程的油膜润滑特性方程组；揭示了液压泵性能失稳失效机理，计算了失稳和失效临界点；对液压泵性能退化状态进行区域划分，分析液压泵不同状态下滑靴磨损量与油膜润滑特性参数及性能退化参数的变化规律，建立了性能预测模型；通过仿真分析验证理论模型的正确性，通过液压泵性能测试试验验证预测模型的有效性和预测精度，结果表明，所构建的模型能够精确预测液压泵性能。

关键词: 性能预测, 液压泵, 滑靴副, 滑靴磨损, 油膜润滑特性

CLC Number:

TH137.51

LIU Siyuan1,2;WANG Guangda1,2;SUN Hongmei3;LIU Jianxun4;JIANG Wanlu1,2. Prediction Method of Performance of Intelligent Hydraulic Components Based on Lubrication Mechanism[J]. China Mechanical Engineering.

刘思远1,2;王广达1,2;孙红梅3;刘建勋4;姜万录1,2. 基于润滑机理的智能液压元件本体性能预测方法[J]. 中国机械工程.

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