液压系统压力脉动衰减器特性研究

发布时间：2019-02-21 16:46

【摘要】：液压系统作为工程机械、制造机械、船舶机械、农业机械等行业的重要组成部分,在向高压、高速、大功率化发展的同时,其振动和噪声日趋严重,对液压系统的振动和噪声实施有效控制已变得非常重要和紧迫。管道压力脉动是液压系统振动和噪声的主要根源之一,在绝大多数情况下压力脉动对系统的正常运行都是不利的。因此,研制能够有效降低液压系统管道压力脉动的装置,对于提升液压系统性能,以及改善工作环境都具有重要意义。基于频率法和CFD仿真技术,本论文研究了液压系统压力脉动衰减器的衰减特性,并得到了液压系统压力脉动衰减器的结构参数影响特性,研制了四种规格的样机。实验研究结果表明：样机可以有效地衰减液压系统管道压力脉动,并具有良好的流体动力性能。论文的主要内容如下：第一章,简述了课题研究的目的与意义,综述了国内外压力脉动衰减器的研究现状及相关产品,提出了本课题的研究内容。第二章,介绍了基本管道动态分析的数学模型,并以此为基础结合不同的负载模型,以传递矩阵的方式建立了液压系统压力脉动衰减器的数学模型,提出了压力脉动衰减器衰减特性的评价方法。第三章,建立了液压系统压力脉动衰减器的CFD仿真模型,完成相关仿真参数的设置。第四章,对比压力脉动衰减器的数学和CFD仿真分析,优化了仿真参数设置。以CFD仿真为主要手段分析了压力脉动衰减器各结构参数对衰减特性的影响,得到结构参数的影响特性,并分析了负载模型和安装位置等因素对衰减特性的影响。第五章,建立了液压系统压力脉动衰减器的性能实验台架,研制了压力脉动衰减器样机,并编写了性能测试软件。围绕设计指标,开展了压力脉动衰减器的衰减特性实验和流体动力性能实验。第六章,总结了全文内容,并对后续研究方向提出展望。
[Abstract]:As an important part of construction machinery, manufacturing machinery, ship machinery, agricultural machinery and so on, hydraulic system is developing to high pressure, high speed and high power, and its vibration and noise are becoming more and more serious. It is very important and urgent to effectively control the vibration and noise of hydraulic system. Pipeline pressure pulsation is one of the main sources of vibration and noise in hydraulic system. In most cases, pressure pulsation is unfavorable to the normal operation of the system. Therefore, it is of great significance to develop a device that can effectively reduce the pressure pulsation of hydraulic system for improving the performance of hydraulic system and improving the working environment. Based on frequency method and CFD simulation technology, the attenuation characteristics of pressure pulsation attenuator in hydraulic system are studied in this paper. The influence characteristics of structure parameters of pressure pulsation attenuator in hydraulic system are obtained, and four kinds of prototypes are developed. The experimental results show that the prototype can attenuate the pressure fluctuation of hydraulic system effectively and has good hydrodynamic performance. The main contents of this paper are as follows: in the first chapter, the purpose and significance of the research are briefly described, the research status and related products of the pressure pulsation attenuator at home and abroad are summarized, and the research content of this subject is put forward. In the second chapter, the mathematical model of the dynamic analysis of the basic pipeline is introduced, and the mathematical model of the pressure pulsation attenuator of the hydraulic system is established by means of transfer matrix combined with different load models. A method for evaluating the attenuation characteristics of pressure pulsating attenuators is presented. In chapter 3, the CFD simulation model of hydraulic pressure pulsation attenuator is established, and the relevant simulation parameters are set up. In chapter 4, the simulation parameters are optimized by comparing the mathematical and CFD simulation analysis of the pressure pulsation attenuator. The influence of structure parameters on attenuation characteristics of pressure pulsating attenuator is analyzed by CFD simulation. The influence of load model and installation position on attenuation characteristics is also analyzed. In the fifth chapter, the performance test bench of hydraulic pressure pulsating attenuator is established, the prototype of pressure pulsation attenuator is developed, and the performance test software is compiled. According to the design index, the attenuation characteristic experiment and hydrodynamic performance experiment of pressure pulsation attenuator are carried out. The sixth chapter summarizes the content of the paper, and puts forward the prospect of the future research direction.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.8

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