【摘要】：隨著國民經(jīng)濟(jì)的快速發(fā)展,我國鋼鐵、能源、航空航天、國防、船舶等行業(yè)迅速崛起,這些行業(yè)對于重型機(jī)械裝備的要求越來越高。電液比例插裝閥作為大中型液壓系統(tǒng)中關(guān)鍵控制元件之一,其性能直接決定了液壓系統(tǒng)的動(dòng)態(tài)品質(zhì)和穩(wěn)態(tài)特性。但國內(nèi)的電液比例插裝閥主要依賴進(jìn)口,為了開發(fā)具有國內(nèi)自主知識產(chǎn)權(quán)的電液比例插裝閥,本文從電液比例插裝閥的關(guān)鍵部件閥芯和閥套入手,利用仿真和實(shí)驗(yàn)手段,對不同結(jié)構(gòu)的閥芯和閥套進(jìn)行研究,為電液比例插裝閥的國產(chǎn)化研究奠定了理論基礎(chǔ)。 首先通過理論計(jì)算的方法,計(jì)算插裝閥不同閥芯節(jié)流孔結(jié)構(gòu)時(shí)插裝閥的過流面積,從而得到插裝閥的理論流量,為插裝閥的結(jié)構(gòu)優(yōu)化奠定理論基礎(chǔ)。建立DN80插裝閥的物理模型,采用Gambit軟件對建立好的流體流動(dòng)區(qū)域的模型進(jìn)行網(wǎng)格劃分,利用FLUENT軟件對流體流動(dòng)區(qū)域進(jìn)行數(shù)值模擬,從而得到整個(gè)流體流動(dòng)區(qū)域的流場。 通過數(shù)值模擬方法得到不同閥芯節(jié)流孔結(jié)構(gòu)和不同閥套通孔結(jié)構(gòu)下的整個(gè)插裝閥流動(dòng)區(qū)域的流場,探討了插裝閥在不同結(jié)構(gòu)下的流量特性、流場的壓力和速度分布特征以及閥芯和閥套的受力情況,揭示了不同閥芯節(jié)流孔結(jié)構(gòu)和不同閥套通孔結(jié)構(gòu)對流量特性的影響規(guī)律,闡明了不同閥芯和閥套結(jié)構(gòu)時(shí)插裝閥流場的優(yōu)缺點(diǎn)。最后,基于相似原理對插裝閥進(jìn)行相似理論分析,得到相似模型,并對相似模型進(jìn)行了可視化實(shí)驗(yàn)研究,驗(yàn)證了仿真模擬結(jié)果的正確性,為插裝閥的優(yōu)化及研發(fā)提供了技術(shù)支撐。
[Abstract]:With the rapid development of the national economy, China's steel, energy, aerospace, national defense, shipping and other industries are rapidly rising, these industries for heavy machinery and equipment more and more demanding. As one of the key control components in large and medium hydraulic system, the performance of electro-hydraulic proportional valve directly determines the dynamic quality and steady-state characteristic of hydraulic system. In order to develop the electro-hydraulic proportional cartridge valve with independent intellectual property rights in China, this paper starts with the valve core and valve sleeve, which is the key component of the electro-hydraulic proportional plug valve, and makes use of simulation and experimental means. The study of valve core and valve sleeve with different structures lays a theoretical foundation for the localization of electro-hydraulic proportional valve. Firstly, through the theoretical calculation method, the overflow area of the cartridge valve with different valve core orifice structure is calculated, and the theoretical flow rate of the cartridge valve is obtained, which lays a theoretical foundation for the structural optimization of the cartridge valve. The physical model of DN80 cartridge valve is established, the model of the established fluid flow region is meshed by Gambit software, and the flow field of the whole fluid flow region is obtained by numerical simulation of the fluid flow region with FLUENT software. The flow field of the whole valve flow region under different valve core throttle orifice structure and different valve sleeve through hole structure is obtained by numerical simulation, and the flow characteristics of cartridge valve under different structure are discussed. The pressure and velocity distribution characteristics of the flow field and the stress situation of the valve core and valve sleeve reveal the influence of different orifice structure of the valve core and the through hole structure of the valve sleeve on the flow characteristics. The advantages and disadvantages of cartridge valve flow field with different valve core and valve sleeve structure are expounded. Finally, based on the similarity theory, the similar model is obtained, and the simulation results are verified by visual experiment. It provides technical support for the optimization and R & D of cartridge valve.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137.52

【引證文獻(xiàn)】

相關(guān)博士學(xué)位論文 前3條

1 彭志威;基于計(jì)算流體力學(xué)的虹吸式流道形狀優(yōu)化設(shè)計(jì)[D];湖南大學(xué);2009年

2 梁桂華;柴油機(jī)缸內(nèi)流場的PIV技術(shù)應(yīng)用研究及數(shù)值模擬[D];大連理工大學(xué);2009年

3 姚靜;鍛造油壓機(jī)液壓控制系統(tǒng)的關(guān)鍵技術(shù)研究[D];燕山大學(xué);2009年

相關(guān)碩士學(xué)位論文 前1條

1 曾清平;新型高頻振動(dòng)閥的設(shè)計(jì)與研究[D];中北大學(xué);2013年

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本文編號：2415059