本文選題：液壓沖擊 + 蓄能器��； 參考：《南京農(nóng)業(yè)大學(xué)》2012年碩士論文

【摘要】：在液壓傳動(dòng)過程中,經(jīng)常出現(xiàn)液壓沖擊現(xiàn)象。液壓缸的突然運(yùn)動(dòng)或停止,以及換向閥的突然換向引起管路內(nèi)液壓油的速度突變,管路內(nèi)的液體壓力發(fā)生急劇交替升降的波動(dòng)過程,使得管路內(nèi)的峰值壓力比正常工作壓力高很多,產(chǎn)生沖擊振動(dòng),導(dǎo)致密封元件松脫,增加泄漏,有些時(shí)候使某些壓力控制的液壓元件產(chǎn)生錯(cuò)誤動(dòng)作,造成事故。因此,減小液壓沖擊是改善液壓系統(tǒng)工作性能的重要課題。 本論文利用蓄能器減小液壓沖擊的方法,它不僅可以減小液壓沖擊,還可以把多余的液壓油存儲(chǔ)起來,在需要時(shí)釋放出來,維持系統(tǒng)壓力,降低了能量的消耗。其主要思想是將系統(tǒng)中的壓力能轉(zhuǎn)換為蓄能器中氣體的壓縮能,通過兩者之間不停的轉(zhuǎn)化,達(dá)到吸收液壓沖擊力,維持系統(tǒng)穩(wěn)定的目的。 本論文主要研究內(nèi)容如下： 首先論述了蓄能器的類型,結(jié)構(gòu)。分析了蓄能器的工作原理及工作過程。在此基礎(chǔ)上,對(duì)蓄能器進(jìn)行受力分析,推導(dǎo)出了蓄能器二階數(shù)學(xué)模型。詳細(xì)分析了二階系統(tǒng)響應(yīng)性能。 其次,在Maltab/Simulink建立仿真模型,對(duì)蓄能器減小液壓沖擊的響應(yīng)性能進(jìn)行分析,研究了不同充氣壓力對(duì)蓄能器減小液壓沖擊性能的影響。 最后,通過設(shè)計(jì)實(shí)驗(yàn)回路。分別對(duì)實(shí)驗(yàn)回路在加裝與未加裝蓄能器的情況下,進(jìn)行了實(shí)驗(yàn)。驗(yàn)證了蓄能器對(duì)于減小液壓沖擊現(xiàn)象有著明顯的作用。在改變連接管路的基礎(chǔ)上,分別進(jìn)行了實(shí)驗(yàn),確定了不同的連接管路對(duì)于蓄能器工作性能有著重要的影響。 研究結(jié)果表明,在合理選擇蓄能器充氣壓力,以及不同連接管路數(shù)據(jù)的情況下,液壓系統(tǒng)中的沖擊現(xiàn)象可以得到有效控制。
[Abstract]:In the process of hydraulic transmission, hydraulic shock often occurs. The sudden movement or stop of the hydraulic cylinder and the sudden reversing of the directional valve cause the sudden change of the speed of the hydraulic oil in the pipeline, and the fluctuation process of the liquid pressure in the pipeline takes place sharply and alternately. The peak pressure in the pipeline is much higher than the normal working pressure, resulting in shock vibration, resulting in loose release of sealing elements, increasing leakage, and sometimes causing some hydraulic components controlled by pressure to misbehave and cause accidents. Therefore, reducing hydraulic impact is an important task to improve the working performance of hydraulic system. In this paper, the accumulator is used to reduce the hydraulic impact. It can not only reduce the hydraulic impact, but also store the excess hydraulic oil, release it when needed, maintain the pressure of the system and reduce the energy consumption. The main idea is to convert the pressure energy of the system into the compression energy of the gas in the accumulator, and to absorb the hydraulic impact force and maintain the stability of the system through the continuous transformation between the two. The main contents of this thesis are as follows: First, the type and structure of accumulator are discussed. The working principle and working process of accumulator are analyzed. On this basis, the second order mathematical model of accumulator is derived by analyzing the force of accumulator. The response performance of the second order system is analyzed in detail. Secondly, the simulation model is established in Maltab/Simulink to analyze the response performance of accumulator to reduce hydraulic shock, and the effect of different inflatable pressure on the hydraulic impact performance of accumulator is studied. Finally, the experimental circuit is designed. Experiments were carried out on the experimental circuits with and without accumulators. It is verified that accumulator has obvious effect on reducing hydraulic impact. On the basis of changing the connection line, experiments were carried out, and it was determined that different connecting pipes had an important effect on the working performance of the accumulator. The results show that the impact phenomenon in hydraulic system can be effectively controlled under the condition of reasonable selection of charging pressure of accumulator and data of different connecting pipes.
【學(xué)位授予單位】：南京農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH137

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 何海洋;俞科云;陳國琳;黃亞農(nóng);;蓄能器—泵系統(tǒng)壓力緩沖仿真與試驗(yàn)[J];艦船科學(xué)技術(shù);2011年07期

2 張路軍,李繼志,顧心懌,潘偉;蓄能器類型及應(yīng)用綜述[J];機(jī)床與液壓;2001年06期

3 朱志堅(jiān);液壓系統(tǒng)振動(dòng)和噪聲與系統(tǒng)設(shè)計(jì)[J];機(jī)床與液壓;2003年01期

4 孔祥東,權(quán)凌霄;蓄能器的研究歷史、現(xiàn)狀和展望[J];機(jī)床與液壓;2004年10期

5 王海蘭;液壓系統(tǒng)設(shè)計(jì)中有關(guān)液壓沖擊吸收問題的探討[J];機(jī)床與液壓;2004年11期

6 黃興;;液壓技術(shù)創(chuàng)新及發(fā)展趨勢(shì)[J];機(jī)床與液壓;2005年12期

7 王紀(jì)森;王海濤;李仕輝;;蓄能器在液壓試驗(yàn)臺(tái)中的參數(shù)分析與仿真[J];機(jī)床與液壓;2010年15期

8 李華聰;李吉;;機(jī)械/液壓系統(tǒng)建模仿真軟件AMESim[J];計(jì)算機(jī)仿真;2006年12期

9 侯友夫,李龍海,陳飛;SIMULINK在液壓系統(tǒng)仿真中的應(yīng)用[J];江蘇煤炭;2002年01期

10 路甬祥;流體傳動(dòng)與控制技術(shù)的歷史進(jìn)展與展望[J];機(jī)械工程學(xué)報(bào);2001年10期

相關(guān)碩士學(xué)位論文 前2條

1 趙航;蓄能器減小液壓驅(qū)動(dòng)系統(tǒng)液壓沖擊的試驗(yàn)研究[D];長安大學(xué);2006年

2 林東陽;液壓振動(dòng)臺(tái)網(wǎng)管諧振分析及其蓄能器減振研究[D];廣東工業(yè)大學(xué);2008年

，

本文編號(hào)：1788431