本文選題：壓力脈動 + 流體濾波器��； 參考：《長沙理工大學(xué)》2012年碩士論文

【摘要】：液壓系統(tǒng)中因壓力脈動而引發(fā)的振動和噪聲沿管路傳播，嚴重影響系統(tǒng)工作性能，日益成為妨礙液壓技術(shù)進步的重要因素之一。分析液壓系統(tǒng)壓力脈動特性，提出行之有效的脈動抑制方法，對控制液壓系統(tǒng)壓力脈動，提高系統(tǒng)可靠性及元件壽命，具有重要意義。 本文以高壓液壓系統(tǒng)壓力脈動為研究對象，圍繞“壓力脈動特性研究”、“流體濾波器設(shè)計與實驗研究”等技術(shù)問題，主要進行如下研究： 1.運用流體網(wǎng)絡(luò)理論，以基本管道分布參數(shù)模型為基礎(chǔ)，分析分支管路系統(tǒng)及樹形拓撲結(jié)構(gòu)管網(wǎng)建模方法，采用傳遞矩陣建立液壓管網(wǎng)系統(tǒng)傳遞函數(shù)數(shù)學(xué)模型。應(yīng)用MATLAB軟件，研究液壓振動測試實驗臺在泵源脈動輸入信號激勵下的壓力脈動特性，并與實驗結(jié)果進行對比。 2.設(shè)計一種以結(jié)構(gòu)振動方式消減壓力脈動的膜片式流體濾波器。采用第四強度理論，對其主要受力部件進行應(yīng)力分析。建立濾波器Pro/E三維模型，并應(yīng)用ANSYS有限元分析軟件，進行靜力學(xué)分析。 3.依托液壓振動測試實驗臺，完成濾波器樣機性能測試。對比分析柱塞泵不同轉(zhuǎn)速下系統(tǒng)壓力脈動特性，，研究膜片式流體濾波器在終端封閉管路負載、終端封閉帶并聯(lián)容腔負載形式下衰減特性。 4.提出辨識膜片式流體濾波器四端網(wǎng)絡(luò)參數(shù)的實驗建模方法，建立流體濾波器傳遞矩陣模型。 研究表明：膜片式流體濾波器能夠衰減液壓系統(tǒng)中、低頻壓力脈動，且單一結(jié)構(gòu)振動體具有明顯的頻率選擇性。負載形式的變化對濾波器消聲性能影響不明顯，證明濾波器具有一定的自適應(yīng)性。本文提出的實驗建模方法，避免動態(tài)流量的測量，參數(shù)辨識過程簡便，精度高，在液壓元件實驗建模中具有推廣應(yīng)用價值。
[Abstract]:The vibration and noise caused by pressure pulsation in hydraulic system propagate along the pipeline, which seriously affect the working performance of the system and become one of the important factors hindering the progress of hydraulic technology. It is of great significance to analyze the pressure fluctuation characteristics of hydraulic system and to put forward an effective method to restrain the pressure pulsation in hydraulic system and to improve the system reliability and component life. In this paper, the pressure pulsation of high pressure hydraulic system is taken as the research object. The main research is as follows: "study on pressure fluctuation characteristics", "fluid filter design and experimental study" and so on. 1. Based on the basic pipeline distribution parameter model, the modeling method of branch pipeline system and tree topology pipe network is analyzed by using fluid network theory, and the transfer function mathematical model of hydraulic pipe network system is established by transfer matrix. The pressure pulsation characteristics of the hydraulic vibration test bench under the excitation of pump source pulsation input signal are studied by using MATLAB software, and the results are compared with the experimental results. 2. A diaphragm fluid filter is designed to reduce pressure pulsation by structural vibration. The fourth strength theory is used to analyze the stress of the main components. The three-dimensional model of filter Pro/E is established, and the statics analysis is carried out by using ANSYS finite element analysis software. 3. Based on the hydraulic vibration test bench, the performance test of the filter prototype is completed. By comparing and analyzing the pressure pulsation characteristics of the piston pump at different rotational speeds, the attenuation characteristics of the diaphragm fluid filter in the form of the terminal closed pipe load and the terminal closed belt parallel capacitive load are studied. 4. An experimental modeling method for identifying the four-terminal network parameters of a membrane fluid filter is presented, and a transfer matrix model of the fluid filter is established. The results show that the diaphragm fluid filter can attenuate the low frequency pressure pulsation in hydraulic system and the single structure vibrator has obvious frequency selectivity. The change of load form has no obvious influence on the noise performance of the filter, which proves that the filter has certain adaptability. The experimental modeling method proposed in this paper avoids the measurement of the dynamic flow rate, the parameter identification process is simple, the precision is high, and the method has the value of popularization and application in the hydraulic component experimental modeling.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137.7

【參考文獻】

相關(guān)期刊論文 前10條

1 鄭容;;齒輪泵用液壓濾波器的研制與應(yīng)用[J];機床與液壓;1991年05期

2 梁仕云;龐庭階;;傳遞矩陣法在管系液體振動研究中的應(yīng)用[J];機床與液壓;1993年05期

3 姜榮俊,何琳;一種新型的流體脈動衰減器[J];機床與液壓;2005年01期

4 單長吉,劉曉紅,王國志;高壓柱塞泵用壓力脈動衰減器的流體特性CFD解析[J];機床與液壓;2005年07期

5 杜潤;柯堅;劉凱;于蘭英;;二級液壓脈動衰減器的共振頻率分析[J];機床與液壓;2010年09期

6 徐兵;童章謙;周高明;;軸向柱塞泵的振動噪聲測試分析及基于殼體的結(jié)構(gòu)優(yōu)化[J];機床與液壓;2010年13期

7 竇雨淋;張濤;;艦船管路流體脈動衰減器的性能研究[J];中國艦船研究;2008年04期

8 吳志章;羅群賢;;復(fù)雜管路系統(tǒng)壓力諧振特性仿真研究[J];計算機仿真;1989年03期

9 賀尚紅,李旭宇,鐘掘;復(fù)雜流體網(wǎng)絡(luò)動態(tài)建模與仿真新方法[J];機械工程學(xué)報;2001年03期

10 邢科禮,劉山,葛思華,何鉞;壓力脈動衰減器衰減效果的評價方法[J];機械研究與應(yīng)用;1998年04期

相關(guān)博士學(xué)位論文 前1條

1 杜潤;液壓系統(tǒng)脈動衰減器的特性分析[D];西南交通大學(xué);2010年

相關(guān)碩士學(xué)位論文 前4條

1 張智慧;水刺頭供水管網(wǎng)液流脈動特性研究[D];鄭州大學(xué);2010年

2 楊小聰;頻率可調(diào)共振式液壓濾波器研究[D];長沙理工大學(xué);2010年

3 呂亞國;飛機燃油系統(tǒng)計算研究[D];西北工業(yè)大學(xué);2006年

4 李赫;可變頻充液管道消聲器設(shè)計與實驗研究[D];哈爾濱工程大學(xué);2009年

本文編號：1924232