高压海淡水轴向柱塞泵平面配流副跨尺度混合非光滑表面关键特性研究

Port plate pair is one key tribopair of the high pressure raw water axial piston pump. It is working in the raw water environment, which has special physical and chemical property. So, the performances of lubrication and sealing, friction and wear, vibration and noise of the port plate pair are poor, which have been the key problems that restrict operation stability and service life of the high pressure raw water axial piston pump.. With the developing of mechanical surface design and performance control, the plain port plate pair of the high pressure raw water axial piston pump with trans-scale hybrid non-smooth surface, which has micro structure with different scale, form and distribution, is conceived. It includes the following scientific problems. Including: (1) revealing the dynamic formation processes of the water film, and establishing water film dynamic lubrication and load model, water leakage model of trans-scale hybrid non-smooth surface plain port plate pair, then exploring the influence rules of trans-scale hybrid non-smooth surface on the lubrication and sealing performance of the plain port plate pair; (2) exploring the frictional loss, wearing mechanism and lubrication condition of the plain port plate pair with trans-scale hybrid non-smooth surface, and exploring the relationship of micro surface structure with different scale, form and distribution on the friction and wear performance of the plain port plate pair with trans-scale hybrid non-smooth surface; (3) exploring the mechanism and behavior of the vibration and noise suppression with trans-scale hybrid non-smooth surface in the plain port plate pair; (4) seeking the multi-objective intelligent collaborative optimization method to optimize the trans-scale hybrid non-smooth surface in the plain port plate pair, and giving the optimal result.. The research work may provide theoretical support and technological guarantee to the design and optimization of plain port plate pair of the high pressure raw water axial piston pump. This project has significant scientific value and social benefit.

配流副是高压海淡水轴向柱塞泵的关键摩擦副，工作在理化性质特殊的海淡水环境中，使其润滑密封差、摩擦磨损严重、振动噪声大，成为制约高压海淡水轴向柱塞泵运行稳定性及服役寿命的关键问题。根据表面功能设计与性能调控的思路，本项目提出具有不同尺度、形态、分布的微结构形成的跨尺度混合非光滑表面的高压海淡水轴向柱塞泵平面配流副，拟解决以下科学问题：①揭示平面配流副跨尺度混合非光滑表面水膜动态建立过程；建立其动态润滑承载及泄漏模型，探究其对润滑密封特性的影响机制；②探索平面配流副跨尺度混合非光滑表面的摩擦损失、磨损机理及润滑状态，及其与表面微结构尺度、形态及分布的关系；③探究平面配流副跨尺度混合非光滑表面的抑振降噪机理及规律；④探求平面配流副跨尺度混合非光滑表面多目标智能协同优化方法并确定优化设计。本项目研究为高压海淡水轴向柱塞泵平面配流副表面设计与优化提供理论支撑和技术保障，具有较好的科学价值和社会效益。

本研究以水压轴向柱塞泵跨尺度混合非光滑表面平面配流副为研究对象，对跨尺度混合非光滑表面润滑水膜的流场进行了数值模拟，研究凹坑尺度、直径、分布与速度变化与润滑水膜的速度场、压力场、表面承载力的关联，并探索非光滑表面润滑水膜的润滑承载机理；在摩擦磨损试验机上开展GF/EPR与CFRPEEK的非光滑表面试样的实验研究，通过分析摩擦系数、介质温度、试样微观形貌、磨损量、粗糙度来确定GF/EPR试样的润滑状态、摩擦磨损特性及机理；仿照水压轴向柱塞泵配流副结构，制作不同类型CFRPEEK非光滑表面试样，开展摩擦磨损实验研究，分析CFRPEEK试样的润滑状态、摩擦磨损特性及机理；基于上述研究，将非光滑表面配流盘装载到水压柱塞泵中开展实验研究，分析非光滑表面配流盘对水压轴向柱塞泵的性能影响。本项目的研究结果对于改善配流副的润滑密封、摩擦磨损性能、延长其工作寿命，揭示其失效机理，建立新的设计方法和设计理论，具有重要的理论意义和广阔的工程应用前景，可为水压轴向柱塞泵平面配流副的减摩耐磨设计提供参考。