【摘要】：閥門作為管道系統(tǒng)中的一個(gè)重要組成部分,能截?cái)嗷蛘{(diào)解管道系統(tǒng)中的介質(zhì)流動(dòng)情況,在流體輸送中發(fā)揮著重要的作用。止回閥被廣泛用于管路系統(tǒng)中,為了防止因正常停泵或動(dòng)力突然失事時(shí),管路中的水錘現(xiàn)象對(duì)管路系統(tǒng)的破壞。礦井排水管路系統(tǒng)在礦井安全生產(chǎn)過(guò)程中起著重要的作用,因此,對(duì)礦井排水管路瞬變流動(dòng)控制及止回閥的研究有重要意義。 本文對(duì)一般供水管路的水錘瞬變過(guò)程用瞬變流動(dòng)理論進(jìn)行了研究,分析了瞬時(shí)關(guān)閉閥門時(shí)水錘波的形成機(jī)理及其傳播過(guò)程,比較了礦井排水管路系統(tǒng)事故停泵過(guò)程的水錘與一般供水管路中的水錘的特點(diǎn),指出兩種水錘產(chǎn)生的根本原因是相同的。利用流體運(yùn)動(dòng)的力學(xué)規(guī)律和連續(xù)性原理,建立了全面表達(dá)水錘現(xiàn)象這種不定常流動(dòng)的數(shù)學(xué)方程。推導(dǎo)了水錘運(yùn)動(dòng)方程和連續(xù)性方程兩個(gè)基本方程,構(gòu)成求解水錘現(xiàn)象的理論基礎(chǔ)。引入特征方向,將描述流體管路瞬態(tài)特性的一階雙曲型擬線性偏微分方程歸結(jié)為常微分方程的求解方法。建立了邊界條件,用特征線法建立了便于計(jì)算機(jī)計(jì)算的管路水錘計(jì)算的數(shù)學(xué)模型。 針對(duì)礦井排水揚(yáng)程高、雜質(zhì)大并有腐蝕性的特點(diǎn)研制一種液壓缸控制止回閥(簡(jiǎn)稱可控閥),利用合理的閥流型以及調(diào)速液壓缸系統(tǒng),操控閥板連續(xù)關(guān)閉過(guò)程。利用CAD繪圖軟件Solidworks建模功能對(duì)可控閥建立三維模型,使用MATLAB軟件分析,結(jié)果顯示利用該連續(xù)關(guān)閉可控止回閥可以有效控制水錘壓升。利用CFD商業(yè)軟件FLUENT仿真軟件對(duì)可控閥的流場(chǎng)分析,和普通旋啟式止回閥的仿真結(jié)果相比表明,該閥可降低流動(dòng)阻力。
[Abstract]:As an important part of pipeline system, valve can cut off or adjust the fluid flow in pipeline system, and plays an important role in fluid transportation. Check valves are widely used in pipeline systems to prevent the water hammer phenomenon in the pipeline from destroying the pipeline system when the pump stops normally or the power suddenly crashes. Mine drainage pipeline system plays an important role in the process of mine safety production, so it is of great significance to study the transient flow control and check valve of mine drainage pipe. In this paper, the transient process of water hammer in general water supply pipeline is studied by transient flow theory, and the formation mechanism and propagation process of water hammer wave during instantaneous valve closure are analyzed. This paper compares the characteristics of water hammer in mine drainage pipeline system with water hammer in general water supply pipeline, and points out that the fundamental causes of the two kinds of water hammer are the same. Based on the mechanical law and continuity principle of fluid motion, a mathematical equation for fully expressing the inconstant flow of water hammer phenomenon is established. Two basic equations of water hammer motion equation and continuity equation are derived, which constitute the theoretical basis for solving water hammer phenomenon. By introducing the characteristic direction, the first order hyperbolic quasilinear partial differential equation describing the transient characteristics of fluid pipeline is reduced to the solution of ordinary differential equation. The boundary condition is established and the mathematical model of pipe water hammer calculation is established by the method of characteristic line. In view of the characteristics of high head, impurity and corrosiveness of mine drainage, a kind of hydraulic cylinder controlled check valve (abbreviated as controllable valve) is developed. The valve plate is continuously closed by using reasonable valve flow pattern and speed regulating hydraulic cylinder system. The three-dimensional model of controllable valve is established by using Solidworks modeling function of CAD drawing software, and analyzed by MATLAB software. The results show that the water hammer pressure rise can be effectively controlled by using this continuously closed controllable check valve. The flow field of the controllable valve is analyzed by CFD commercial software FLUENT, and compared with the simulation results of the conventional rotary check valve, it shows that the valve can reduce the flow resistance.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TD744

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 羅志昌,何紹德;流體管道系統(tǒng)瞬態(tài)流動(dòng)的網(wǎng)絡(luò)分析方法[J];北京工業(yè)大學(xué)學(xué)報(bào);1984年01期

2 楊曉東,朱滿林;液控蝶閥在長(zhǎng)距離壓力管道中的應(yīng)用[J];中國(guó)給水排水;1998年05期

3 李良庚,雷冬梅;泵站水錘防護(hù)[J];機(jī)電設(shè)備;2005年01期

4 謝水波,張浩江,汪興華,陳勝兵;停泵水錘電算中的幾個(gè)問(wèn)題[J];給水排水;2000年02期

5 陳燎原,潘地林;礦井排水可控止回閥系統(tǒng)及降阻的試驗(yàn)研究[J];礦冶工程;2002年01期

6 葉宏開,王學(xué)芳,湯榮銘;防水錘兩階段關(guān)閉止回閥的研究[J];流體工程;1987年06期

7 劉光臨,蔣勁,易鋼敏;泵系統(tǒng)水錘最優(yōu)閥調(diào)節(jié)研究[J];流體工程;1992年06期

8 陳燎原，，陳長(zhǎng)英，潘地林;逆止閥水錘控制及降阻的試驗(yàn)研究[J];煤炭科學(xué)技術(shù);1994年04期

9 鄭銘,陳池,袁壽其;水錘數(shù)值計(jì)算的全特性曲線法[J];農(nóng)業(yè)機(jī)械學(xué)報(bào);2000年05期

10 郭令軍;陳燎原;黃龍;程張;;礦井排水可控止回閥系統(tǒng)的仿真研究[J];煤礦機(jī)械;2013年05期

本文編號(hào)：2268612