本文關鍵詞：氣體流動阻力損失對反向擴孔氣動沖擊器性能的影響　出處：《西南交通大學學報》2016年06期 　論文類型：期刊論文

  更多相關文章： 反向擴孔氣動沖擊器 氣體流動 壓力損失 計算機仿真

【摘要】：為了研究反向擴孔氣動沖擊器內(nèi)部氣體流動阻力損失對其性能的影響,在簡化復雜的氣路基礎上,從其結構和工作原理出發(fā),分析了沖擊器工作過程中氣體流動所產(chǎn)生的壓力損失;在有壓力損失的條件下,研究沖擊器氣腔內(nèi)氣體變化特性,建立了沖擊器的工作過程數(shù)學模型;根據(jù)數(shù)學模型,應用MATLAB程序進行計算機仿真運算,得到了沖擊器工作過程中壓力損失曲線,以及壓力損失條件下活塞運動特性和各腔壓力變化規(guī)律.研究結果表明:氣體流動阻力損失影響沖擊器破巖效率,使得沖擊器活塞運動末速度從5.05 m/s下降到4.22 m/s,沖擊頻率從5.00 Hz下降到4.28 Hz;沖擊器尾氣壓力僅為0.140 MPa,低于設計值0.185 MPa,影響沖擊器尾氣排屑.
[Abstract]:In order to study the effect of the gas flow resistance loss on the performance of the reverse reaming pneumatic impactor, the structure and working principle of the gas flow impactor are analyzed on the basis of simplifying the complicated gas path. The pressure loss caused by the gas flow during the operation of the impactor is analyzed. Under the condition of pressure loss, the change characteristics of gas in the impactor chamber are studied, and the mathematical model of the working process of the impactor is established. According to the mathematical model, the MATLAB program is used to carry out the computer simulation operation, and the pressure loss curve in the working process of the impactor is obtained. The results show that the loss of gas flow resistance affects the rock breaking efficiency of the impactor. The end velocity of piston is decreased from 5.05 m / s to 4.22 m / s, and the impact frequency is reduced from 5.00 Hz to 4.28 Hz. The exhaust pressure of the impactor is only 0.140 MPa, which is lower than the design value of 0.185 MPA, which affects the exhaust emission of the impactor.
【作者單位】： 中南大學機電工程學院;
【基金】：國家自然科學基金資助項目(51375499)
【分類號】：TU63
【正文快照】： 非開挖技術是一種利用巖土鉆掘設備進行地下管道鋪設和修復的施工技術[1-2],該技術能夠在不進行地表開挖的情況下實現(xiàn)管道鋪設,減少了施工時對交通、環(huán)境和建筑的破壞[3].擴孔器是非開挖施工中巖土鉆掘的重要設備.傳統(tǒng)的擴孔設備在泥層和沙泥層工作很好,但當遇到巖石、卵礫石，

本文編號：1413967