本文關(guān)鍵詞： 插裝平衡閥 平衡回路 AMESim Fluent 正交試驗(yàn)法　出處：《天津理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：液壓閥是流體傳動(dòng)和控制技術(shù)的基礎(chǔ)元件，控制液壓回路中液體的壓力、流量及流動(dòng)方向。插裝閥以其高壓、大容量、小型、通流能力大、閥芯阻力小等優(yōu)點(diǎn)成為液壓閥發(fā)展的必然趨勢(shì)。本文所研究插裝平衡閥，使用在活塞下行的回油路上，防止立式液壓缸與垂直工作載荷由于自身重力導(dǎo)致的活塞下滑。論文根據(jù)此類閥在實(shí)際應(yīng)用中出現(xiàn)的流量小，泄漏大，壓降不平穩(wěn)等問題，結(jié)合實(shí)驗(yàn)數(shù)據(jù)和理論知識(shí)，對(duì)液壓系統(tǒng)進(jìn)行設(shè)計(jì)，完善插裝平衡閥的內(nèi)部結(jié)構(gòu)，最終達(dá)到對(duì)整個(gè)閥的性能優(yōu)化。論文以一舉升系統(tǒng)為研究對(duì)象，首先對(duì)其液壓系統(tǒng)進(jìn)行設(shè)計(jì)，并著重分析了其平衡回路，應(yīng)用CFD和正交試驗(yàn)對(duì)插裝平衡閥進(jìn)行分析優(yōu)化。本文主要研究的內(nèi)容包括以下內(nèi)容。 （1）對(duì)插裝平衡閥的工作原理進(jìn)行分析，建立整個(gè)平衡閥三維模型并分析其結(jié)構(gòu) 1）根據(jù)液壓系統(tǒng)的理論知識(shí)，結(jié)合平衡閥在液壓系統(tǒng)中的實(shí)際作用，對(duì)舉升液壓系統(tǒng)的分析，完成舉升液壓系統(tǒng)的方案設(shè)計(jì)，使其滿足該液壓系統(tǒng)的工作需求。 2）結(jié)合流體力學(xué)有關(guān)知識(shí)和插裝平衡閥的結(jié)構(gòu)特點(diǎn)，建立插裝平衡閥的內(nèi)部流場(chǎng)模型。利用理論分析和計(jì)算機(jī)仿真模擬技術(shù)，對(duì)插裝平衡閥靜、動(dòng)態(tài)特性以及平衡回路的穩(wěn)定性進(jìn)行分析和研究，為設(shè)計(jì)、選擇和優(yōu)化插裝閥結(jié)構(gòu)參數(shù)提供必要的理論依據(jù)，也為增強(qiáng)整個(gè)系統(tǒng)穩(wěn)定性和可靠性奠定基礎(chǔ)。 （2）對(duì)插裝平衡閥的結(jié)構(gòu)進(jìn)行改進(jìn)，性能進(jìn)行優(yōu)化 1）通過(guò)分析計(jì)算，確定插裝平衡閥內(nèi)部結(jié)構(gòu)的尺寸范圍，用Fluent流體軟件對(duì)插裝平衡閥內(nèi)部流場(chǎng)進(jìn)行靜態(tài)分析，用AEMSim軟件對(duì)插裝平衡閥進(jìn)行動(dòng)態(tài)分析,并最終得流量，，壓力特性曲線。 2）通過(guò)正交試驗(yàn)，對(duì)影響插裝平衡閥性能的各種因素對(duì)比分析，最終找到影響插裝平衡閥性能的最主要因素。改進(jìn)插裝平衡閥的內(nèi)部流道結(jié)構(gòu)和選取合適的彈簧剛度，使插裝平衡閥壓力特性，流量特性以及穩(wěn)定性等性能達(dá)到最佳。
[Abstract]:Hydraulic valve is the basic component of fluid transmission and control technology. It controls the pressure, flow rate and flow direction of liquid in hydraulic circuit. The advantages of small core resistance have become an inevitable trend in the development of hydraulic valves. To prevent the vertical hydraulic cylinder and vertical working load from sliding due to their own gravity, the paper combines the experimental data and theoretical knowledge according to the problems such as small flow rate, large leakage, non-steady pressure drop and so on, which appear in the practical application of this kind of valve. The hydraulic system is designed, the internal structure of the balance valve is improved, and the performance of the whole valve is optimized. Firstly, the hydraulic system is designed, and the balance loop is analyzed. CFD and orthogonal test are used to analyze and optimize the balance valve. The main contents of this paper are as follows. 1) analyze the working principle of the balance valve, set up the three-dimensional model of the balance valve and analyze its structure. 1) according to the theoretical knowledge of hydraulic system and the actual function of balance valve in hydraulic system, the lifting hydraulic system is analyzed, and the scheme design of lifting hydraulic system is completed to satisfy the working requirements of the hydraulic system. 2) based on the knowledge of hydrodynamics and the structural characteristics of the balance valve, the internal flow field model of the balance valve is established. The dynamic characteristics and the stability of the balance circuit are analyzed and studied, which provides the necessary theoretical basis for designing, selecting and optimizing the structural parameters of the cartridge valve, and also lays a foundation for enhancing the stability and reliability of the whole system. 2) improving the structure and optimizing the performance of the balance valve. 1) through the analysis and calculation, the size range of the internal structure of the insert balance valve is determined. The static analysis of the internal flow field of the plug balance valve is carried out with Fluent fluid software, and the dynamic analysis of the plug balance valve is carried out with the AEMSim software, and the final flow rate is obtained. Pressure characteristic curve. 2) through the orthogonal test, the factors affecting the performance of the balance valve are compared and analyzed. Finally, the main factors affecting the performance of the balance valve are found. The internal structure of the balance valve is improved and the suitable spring stiffness is selected. The pressure characteristics, flow characteristics and stability of the balance valve are optimized.
【學(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH137.52

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