【摘要】：液壓系統(tǒng)作為工程機(jī)械、制造機(jī)械、船舶機(jī)械、農(nóng)業(yè)機(jī)械等行業(yè)的重要組成部分,在向高壓、高速、大功率化發(fā)展的同時(shí),其振動(dòng)和噪聲日趨嚴(yán)重,對(duì)液壓系統(tǒng)的振動(dòng)和噪聲實(shí)施有效控制已變得非常重要和緊迫。管道壓力脈動(dòng)是液壓系統(tǒng)振動(dòng)和噪聲的主要根源之一,在絕大多數(shù)情況下壓力脈動(dòng)對(duì)系統(tǒng)的正常運(yùn)行都是不利的。因此,研制能夠有效降低液壓系統(tǒng)管道壓力脈動(dòng)的裝置,對(duì)于提升液壓系統(tǒng)性能,以及改善工作環(huán)境都具有重要意義。 基于頻率法和CFD仿真技術(shù),本論文研究了液壓系統(tǒng)壓力脈動(dòng)衰減器的衰減特性,并得到了液壓系統(tǒng)壓力脈動(dòng)衰減器的結(jié)構(gòu)參數(shù)影響特性,研制了四種規(guī)格的樣機(jī)。實(shí)驗(yàn)研究結(jié)果表明：樣機(jī)可以有效地衰減液壓系統(tǒng)管道壓力脈動(dòng),并具有良好的流體動(dòng)力性能。論文的主要內(nèi)容如下： 第一章,簡(jiǎn)述了課題研究的目的與意義,綜述了國(guó)內(nèi)外壓力脈動(dòng)衰減器的研究現(xiàn)狀及相關(guān)產(chǎn)品,提出了本課題的研究?jī)?nèi)容。 第二章,介紹了基本管道動(dòng)態(tài)分析的數(shù)學(xué)模型,并以此為基礎(chǔ)結(jié)合不同的負(fù)載模型,以傳遞矩陣的方式建立了液壓系統(tǒng)壓力脈動(dòng)衰減器的數(shù)學(xué)模型,提出了壓力脈動(dòng)衰減器衰減特性的評(píng)價(jià)方法。 第三章,建立了液壓系統(tǒng)壓力脈動(dòng)衰減器的CFD仿真模型,完成相關(guān)仿真參數(shù)的設(shè)置。 第四章,對(duì)比壓力脈動(dòng)衰減器的數(shù)學(xué)和CFD仿真分析,優(yōu)化了仿真參數(shù)設(shè)置。以CFD仿真為主要手段分析了壓力脈動(dòng)衰減器各結(jié)構(gòu)參數(shù)對(duì)衰減特性的影響,得到結(jié)構(gòu)參數(shù)的影響特性,并分析了負(fù)載模型和安裝位置等因素對(duì)衰減特性的影響。 第五章,建立了液壓系統(tǒng)壓力脈動(dòng)衰減器的性能實(shí)驗(yàn)臺(tái)架,研制了壓力脈動(dòng)衰減器樣機(jī),并編寫了性能測(cè)試軟件。圍繞設(shè)計(jì)指標(biāo),開展了壓力脈動(dòng)衰減器的衰減特性實(shí)驗(yàn)和流體動(dòng)力性能實(shí)驗(yàn)。 第六章,總結(jié)了全文內(nèi)容,并對(duì)后續(xù)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.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH137.8

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