本文關(guān)鍵詞： 大流量液控單向閥 單向流固耦合 動(dòng)態(tài)特性 實(shí)驗(yàn)研究 設(shè)計(jì)方法　出處：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著高產(chǎn)高效采煤工作面的迅速發(fā)展,要求支架用大流量液控單向閥向高壓大流量方向發(fā)展,并對(duì)其可靠性及壽命提出了更高要求。支架卸載時(shí),大流量液控單向閥反向打開,立柱下腔的高水基乳化液大量且快速地溢出,此過程中,系統(tǒng)往往伴隨著巨大的沖擊,過高的沖擊壓力不僅會(huì)損壞支架上的液壓設(shè)備,嚴(yán)重時(shí)還會(huì)造成管路接口的斷裂,導(dǎo)致重大事故。由于缺少設(shè)計(jì)理論指導(dǎo),設(shè)計(jì)方法落后,同時(shí)國(guó)內(nèi)缺少近似工況的大流量液控單向閥性能實(shí)驗(yàn)臺(tái),使得我國(guó)研制的大流量液控單向閥產(chǎn)品與國(guó)外差距較大。針對(duì)此問題,本文對(duì)支架用大流量液控單向閥的設(shè)計(jì)方法及實(shí)驗(yàn)進(jìn)行了研究,主要包括以下幾個(gè)方面:首先,基于FDY800/50大流量液控單向閥進(jìn)行了結(jié)構(gòu)及關(guān)鍵參數(shù)的初步設(shè)計(jì)。建立了三維流道幾何模型,運(yùn)用FLUENT軟件對(duì)大流量液控單向閥的內(nèi)部流場(chǎng)進(jìn)行了流體動(dòng)力學(xué)分析;用ANSYS Workbench對(duì)其大、小閥芯進(jìn)行了單向流固耦合分析。研究了閥芯不同開口度和小閥芯不同半錐角下大流量液控單向閥的流體動(dòng)力學(xué)規(guī)律和大、小閥芯的應(yīng)力以及變形情況。研究表明,閥芯開口度越大、小閥芯半錐角越大,液壓支架卸載過程中的沖擊和流體能量損失越小,大、小閥芯的等效應(yīng)力越小,且都滿足45#鋼的許用強(qiáng)度。其次,應(yīng)用AMESim軟件在大流量液控單向閥動(dòng)態(tài)特性數(shù)學(xué)模型的基礎(chǔ)上,建立了大流量液控單向閥的動(dòng)態(tài)仿真模型。通過仿真得到了大流量液控單向閥的動(dòng)態(tài)特性曲線,對(duì)比分析了不同小閥芯半錐角和不同控制壓力對(duì)大流量液控單向閥動(dòng)態(tài)性能的影響。仿真結(jié)果表明,增大控制壓力和小閥芯半錐角能有效減小卸載時(shí)的壓力沖擊,增加開啟過程中的穩(wěn)定性,顯著地提高大流量液控單向閥的動(dòng)態(tài)特性。最后,搭建蓄能器-增壓缸實(shí)驗(yàn)系統(tǒng),對(duì)大流量液控單向閥進(jìn)行了實(shí)驗(yàn)研究。通過實(shí)驗(yàn)分析研究了大流量液控單向閥的工作過程和動(dòng)態(tài)特性,同時(shí)將實(shí)驗(yàn)結(jié)果與仿真結(jié)果進(jìn)行對(duì)比,驗(yàn)證了仿真結(jié)果的正確性。實(shí)驗(yàn)研究表明,小閥芯半錐角越大、控制壓力越高,大流量液控單向閥的動(dòng)態(tài)性能越好。本文以小閥芯不同半錐角為主線,從結(jié)構(gòu)設(shè)計(jì)、單向流固耦合分析、動(dòng)態(tài)仿真分析和實(shí)驗(yàn)研究方面系統(tǒng)地建立了大流量液控單向閥的設(shè)計(jì)方法,同時(shí)把其關(guān)鍵部件進(jìn)行流單向固耦合分析,為液壓支架用閥的部件設(shè)計(jì)和校核提供了新思路。
[Abstract]:With the rapid development of high yield and high efficiency coal mining face, it is required that the high flow hydraulic control unidirectional valve should be developed to the high pressure and large flow direction, and the reliability and life of the support should be higher. When the support is unloaded, the large flow hydraulic control one way valve opens in reverse. The high water base emulsion in the lower chamber of the column overflows rapidly. In this process, the system is often accompanied by a huge impact, too high impact pressure will not only damage the hydraulic equipment on the support, but also lead to the breakage of the pipe interface. Because of the lack of design theory guidance, the design method is backward, at the same time the domestic lack of large flow hydraulic control valve performance test table, In order to solve this problem, this paper studies the design method and experiment of large flow hydraulic one-way valve for support, which includes the following aspects: first, Based on FDY800/50, the structure and key parameters of the valve are preliminarily designed. A 3D flow channel geometry model is established, and the internal flow field of the valve is analyzed by FLUENT software. The flow field of the valve is analyzed by ANSYS Workbench, and the flow field of the valve is analyzed by ANSYS Workbench. The unidirectional fluid-solid coupling analysis of small spool is carried out. The hydrodynamic law, stress and deformation of large flow hydraulic unidirectional valve with different opening degree and different half cone angle of small valve core are studied. The larger the opening degree of the valve core, the greater the half cone angle of the small valve core, the smaller the impact and the loss of fluid energy during unloading of the hydraulic support, the smaller the equivalent stress of the small valve core, and all of which meet the allowable strength of 4 steel. Secondly, Based on the mathematical model of the dynamic characteristics of the large flow hydraulic control one way valve, the dynamic simulation model of the large flow hydraulic control one way valve is established by using AMESim software, and the dynamic characteristic curve of the large flow liquid control one way valve is obtained by simulation. The effects of different half cone angle of small valve core and different control pressure on the dynamic performance of liquid controlled unidirectional valve with large flow are analyzed. The simulation results show that increasing the control pressure and the half cone angle of small valve core can effectively reduce the pressure shock during unloading. The stability of the valve during the opening process is increased, and the dynamic characteristics of the hydraulic one-way valve with large flow rate are significantly improved. Finally, an experimental system of accumulator and pressurized cylinder is built. In this paper, the working process and dynamic characteristics of the large flow hydraulic control one-way valve are analyzed and compared with the simulation results, and the experimental results are compared with the simulation results. The experimental results show that the larger the half cone angle of the small valve core is, the higher the control pressure is, the better the dynamic performance of the large flow hydraulic control one-way valve is. The main line of this paper is the different half cone angle of the small valve core. In the aspects of unidirectional fluid-solid coupling analysis, dynamic simulation analysis and experimental research, the design method of large flow hydraulic control one-way valve is systematically established. At the same time, the key components of the valve are analyzed by flow unidirectional solid coupling analysis. It provides a new idea for the design and checking of the valve for hydraulic support.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD355

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 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

2 馮靜;陶然;馬勝鋼;;功率鍵合圖-狀態(tài)方程法在新型安全閥動(dòng)態(tài)特性研究中的應(yīng)用[J];機(jī)床與液壓;2009年08期

3 王慧;席亞兵;王超;謝鑫;;基于FLUENT的液壓支架雙極保護(hù)安全閥的仿真研究[J];煤礦機(jī)械;2009年12期

4 韓偉;;大流量液控單向閥防沖擊技術(shù)研究[J];煤礦開采;2009年02期

相關(guān)碩士學(xué)位論文 前1條

1 張秋菊;高水基安全閥流場(chǎng)的CFD仿真[D];太原理工大學(xué);2008年

，

本文編號(hào)：1501375