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膜片式流體濾波器結(jié)構(gòu)設(shè)計(jì)與實(shí)驗(yàn)研究

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  本文選題:壓力脈動(dòng) + 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(dòng)而引發(fā)的振動(dòng)和噪聲沿管路傳播,嚴(yán)重影響系統(tǒng)工作性能,日益成為妨礙液壓技術(shù)進(jìn)步的重要因素之一。分析液壓系統(tǒng)壓力脈動(dòng)特性,提出行之有效的脈動(dòng)抑制方法,對控制液壓系統(tǒng)壓力脈動(dòng),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(dòng)為研究對象,圍繞“壓力脈動(dòng)特性研究”、“流體濾波器設(shè)計(jì)與實(shí)驗(yàn)研究”等技術(shù)問題,主要進(jìn)行如下研究: 1.運(yùn)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?fù)浣Y(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(dòng)測試實(shí)驗(yàn)臺在泵源脈動(dòng)輸入信號激勵(lì)下的壓力脈動(dòng)特性,并與實(shí)驗(yàn)結(jié)果進(jìn)行對比。 2.設(shè)計(jì)一種以結(jié)構(gòu)振動(dòng)方式消減壓力脈動(dòng)的膜片式流體濾波器。采用第四強(qiáng)度理論,對其主要受力部件進(jìn)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(jìn)行靜力學(xué)分析。 3.依托液壓振動(dòng)測試實(shí)驗(yàn)臺,完成濾波器樣機(jī)性能測試。對比分析柱塞泵不同轉(zhuǎn)速下系統(tǒng)壓力脈動(dòng)特性,,研究膜片式流體濾波器在終端封閉管路負(fù)載、終端封閉帶并聯(lián)容腔負(fù)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(shí)驗(yàn)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(dòng),且單一結(jié)構(gòu)振動(dòng)體具有明顯的頻率選擇性。負(fù)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(shí)驗(yàn)建模方法,避免動(dòng)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(shí)驗(yàn)建模中具有推廣應(yīng)用價(jià)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

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