项目名称： 多场耦合下海淡水液压马达振动噪声产生机理及其抑制研究

项目编号： No.51505111

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 王志强

作者单位： 杭州电子科技大学

项目金额： 20万元

中文摘要： 本项目以低速直驱大扭矩海淡水液压马达为研究对象，针对多场耦合作用下水液压马达的振动、噪声问题，开展其固、液、声、热等多场耦合叠加机制的研究，仿生非光滑表面织构的减阻降噪及润滑理论的研究等主要科学问题。主要包括：①建立定子柱塞的流体润滑热机耦合模型，探究定子柱塞结构各参数对其敲击噪声的影响规律②建立扭矩突变下的转子轴承系统动力学模型，揭示扭矩变化在转子轴承系统中的耦合传递规律。③研究不同表面形态的仿生织构样品在海淡水中的摩擦噪声，寻找流体的流动特性、摩擦副表面的粘附特性与仿生表面微结构间的协同对降低摩擦噪声的可能性及作用机理。④建立包含结构振动、压力流量振动、气蚀冲击振动在内的多场耦合振动模型，揭示各振动信号在复合振动场中的耦合叠加机制。本项目的研究对于提高水液压马达的转换效率，延长关键零部件的工作寿命，揭示其失效机理，建立新的设计方法及设计理论，具有重要的理论意义和广阔的工程应用前景。

中文关键词： 水液压马达；摩擦副；振动噪声；仿生非光滑表面织构；多场耦合

英文摘要： This proposal takes low speed direct-driven high torque sea and fresh water hydraulic motor as object. As to the problems of operating noises and vibrations of water hydraulic motor in multiple coupled fields, this project prepare to investigate the major scientific problems as multi-field coupling mechanism of fluid-liquid-sound-thermal interaction, lubricating mechanism and the drag and noise reduction of bionic non-smooth surface texture. Include (1) establishing fluid lubrication and thermo-mechanical coupling model of the stator plunger pair and exploring the influence of structure parameters of stator and plunger on water hydraulic motor; (2) establishing dynamic model of rotor-bearing system with torque mutation and revealing the coupling transfer rule of torque variation in rotor-bearing system; (3) Investigating friction-induced noise of the friction pairs with different bionic surface texture form in sea and fresh water and seeking the synergie effect of flowing characteristics of fluids, adhesion characteristics of the surface of tribopairs and bionic surface microstructure on friction-induced noise reduction; (4) establishing multi-field coupling vibration model of structural vibration, pressure flow vibration and cavitation shock vibration and revealing coupling superposition mechanism of these vibration signals in compound vibration field. The research work may improve the converting efficiency and prolong the no-failure lifetime of key parts and reveal failure mechanism and establish new design theories and methods of water hydraulic motor. Therefore, studies this project, not only has important theory significance, and has a vast application prospect.

英文关键词： water hydraulic motor;friction pairs;vibration and noise;bionic non-smooth surface texture;multi-field coupling