本文選題：滑閥 + 穩(wěn)態(tài)液動力　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：液壓控制閥的性能優(yōu)化是提高液壓技術(shù)水平的重要環(huán)節(jié)。穩(wěn)態(tài)液動力是液壓閥設(shè)計優(yōu)化分析的重要參考依據(jù),完整的設(shè)計過程包括穩(wěn)態(tài)液動力的計算、特性揭示以及補償優(yōu)化,每個過程對應(yīng)得到的結(jié)論都將對液壓控制閥的優(yōu)化設(shè)計提供理論依據(jù)。本文以液壓閥中的滑閥形式為研究對象,分別從壓力分析和動量定理角度對其建立穩(wěn)態(tài)液動力的數(shù)學(xué)計算模型,并將計算模型與數(shù)值計算得到的流場數(shù)據(jù)相結(jié)合。不同計算方法得到的穩(wěn)態(tài)液動力不僅是液動力特性揭示的前提,也是互相驗證計算正確性的依據(jù)之一。對流動過程進(jìn)行簡化假設(shè),建立理想的二維計算模型,計算比較入口節(jié)流出口無節(jié)流和入口無節(jié)流出口節(jié)流兩種流動形式的液動力特性,結(jié)合流場從動量及熵產(chǎn)的角度揭示液動力特性機(jī)理。針對與理論液動力特性不符的流動形式研究結(jié)構(gòu)參數(shù)對其液動力特性的影響,并對影響機(jī)理進(jìn)行闡述總結(jié)。在二維理想化模型計算的基礎(chǔ)上建立三維計算模型,進(jìn)行網(wǎng)格無關(guān)性驗證,并將液動力計算結(jié)果與二維模型進(jìn)行對比,驗證仿真計算的正確性。應(yīng)用動量定理及流動熵產(chǎn)理論研究滑閥的液動力補償,確定可優(yōu)化的結(jié)構(gòu)參數(shù),搭建液動力補償參數(shù)自動優(yōu)化平臺,集成建立計算模型、網(wǎng)格劃分及流場計算三個過程,通過自動修改可優(yōu)化的結(jié)構(gòu)參數(shù)完成液動力補償?shù)淖詣觾?yōu)化。研究優(yōu)化過程中優(yōu)化算法及算法參數(shù)對優(yōu)化效果的影響,找出最佳優(yōu)化算法和算法參數(shù)。搭建液動力實驗臺對液動力進(jìn)行測量,針對仿真計算模型設(shè)計實驗閥,模擬仿真計算的物理邊界條件,驗證不同閥開口下的液動力特性、結(jié)構(gòu)參數(shù)對液動力特性的影響以及補償優(yōu)化閥結(jié)構(gòu)的優(yōu)越性。全文通過壓力分析和動量定理結(jié)合流場數(shù)值計算數(shù)據(jù)計算穩(wěn)態(tài)液動力;應(yīng)用動量定理和流動熵產(chǎn)理論對液動力特性進(jìn)行闡述并總結(jié)結(jié)構(gòu)參數(shù)對液動力特性的影響;搭建液動力補償參數(shù)自動優(yōu)化平臺,探尋最佳優(yōu)化算法和算法參數(shù)完成液動力補償?shù)淖詣觾?yōu)化;設(shè)計液動力測量實驗臺,驗證經(jīng)數(shù)值計算分析得到的液動力特性相關(guān)結(jié)論的正確性。
[Abstract]:The performance optimization of hydraulic control valve is an important link to improve the level of hydraulic technology. The steady-state hydraulic power is an important reference for the optimization analysis of the hydraulic valve design. The complete design process includes the calculation of the steady-state hydraulic power, the disclosure of the characteristics and the optimization of the compensation. The conclusions obtained from each process will provide theoretical basis for the optimal design of hydraulic control valves. In this paper, the sliding valve in hydraulic valve is taken as the research object, and the mathematical calculation model of steady fluid dynamics is established from the angle of pressure analysis and momentum theorem respectively, and the calculation model is combined with the flow field data obtained by numerical calculation. The steady-state hydrodynamic force obtained by different calculation methods is not only the premise to reveal the hydrodynamic characteristics, but also one of the bases for mutual verification of the correctness of the calculation. The flow process is simplified and an ideal two-dimensional computational model is established to calculate and compare the hydrodynamic characteristics of the two kinds of flow modes: the inlet and the outlet without throttling and the inlet without throttling. Combined with the flow field, the mechanism of hydrodynamic characteristics is revealed from the angle of momentum and entropy production. The influence of structural parameters on the hydrodynamic characteristics of the flow forms which are not consistent with the theoretical hydrodynamic characteristics is studied, and the influence mechanism is summarized. On the basis of the two-dimensional idealized model, a three-dimensional computational model is established to verify the grid independence. The results of hydrodynamic calculation are compared with the two-dimensional model to verify the correctness of the simulation calculation. Based on momentum theorem and flow entropy production theory, the hydrodynamic compensation of slide valve is studied. The structure parameters can be optimized, the automatic optimization platform of hydraulic power compensation parameters is set up, the calculation model is integrated, the grid is divided and the flow field is calculated. The automatic optimization of hydrodynamic compensation is accomplished by automatically modifying the structure parameters that can be optimized. The effect of optimization algorithm and algorithm parameters on the optimization effect is studied, and the optimal optimization algorithm and algorithm parameters are found out. The hydraulic power was measured by the hydraulic power test bench. The experimental valve was designed according to the simulation calculation model. The physical boundary conditions of the simulation calculation were simulated to verify the hydrodynamic characteristics under the different opening of the valve. The influence of structural parameters on hydrodynamic characteristics and the superiority of compensation optimization valve structure. In this paper, the steady-state hydrodynamic force is calculated by pressure analysis and momentum theorem combined with the numerical calculation data of the flow field, the hydrodynamic characteristics are expounded by the momentum theorem and the flow entropy production theory, and the influence of structural parameters on the hydrodynamic characteristics is summarized. Build the automatic optimization platform of hydraulic power compensation parameters, explore the optimal optimization algorithm and algorithm parameters to complete the automatic optimization of hydrodynamic compensation. The validity of the conclusions obtained by numerical calculation and analysis is verified.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH137.52

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