本文關(guān)鍵詞：基于多物理場(chǎng)耦合分析的高壓柱塞泵結(jié)構(gòu)強(qiáng)度研究　出處：《重慶理工大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 高壓油泵 有限元 多物理場(chǎng) 耦合

【摘要】：隨著柴油發(fā)動(dòng)機(jī)的飛速發(fā)展,燃油噴射的壓力也越來越大,而高壓柱塞泵是燃油噴射系統(tǒng)的核心,其結(jié)構(gòu)緊湊、工作壓力高,在高壓下仍需保持較高的效率。本文利用有限元軟件和松耦合的方法對(duì)高壓柱塞泵進(jìn)行多物理場(chǎng)耦合分析的結(jié)構(gòu)強(qiáng)度研究,提出了比較系統(tǒng)性對(duì)其進(jìn)行研究的方法。主要做了如下工作:⑴高壓油泵在泵油階段的流體動(dòng)力學(xué)分析首先利用Hypermesh有限元軟件建立燃油的流體動(dòng)力學(xué)模型,將模型導(dǎo)入Fluent軟件進(jìn)行流體分析,根據(jù)所給的條件及參數(shù),計(jì)算其泵油過程油壓變化。⑵油泵柱塞偶件流固耦合結(jié)構(gòu)強(qiáng)度分析運(yùn)用Hypermesh建立柱塞與柱塞套的結(jié)構(gòu)有限元模型,其次利用前述流體動(dòng)力學(xué)計(jì)算結(jié)果,導(dǎo)出柱塞與柱塞套的最大油壓時(shí)刻流體壓力分布數(shù)據(jù),將其導(dǎo)入Abaqus軟件里,將油壓載荷映射到固體有限元模型中,計(jì)算柱塞偶件應(yīng)力與變形。⑶凸輪-滾輪-滾輪銷運(yùn)動(dòng)組合的結(jié)構(gòu)力學(xué)分析首先運(yùn)用Adams多體動(dòng)力學(xué)軟件,導(dǎo)入前述柱塞油壓時(shí)間曲線進(jìn)行加載,進(jìn)行多體動(dòng)力學(xué)仿真。然后根據(jù)計(jì)算結(jié)果提取滾輪銷對(duì)滾輪的作用力,利用Abaqus軟件對(duì)凸輪-滾輪進(jìn)行靜力分析。其次利用經(jīng)典的Hertz接觸理論計(jì)算法和有限元法計(jì)算出的最大接觸應(yīng)力進(jìn)行比較。再通過建立Archard磨損方程對(duì)凸輪在一個(gè)周期內(nèi)的磨損做簡(jiǎn)單的估算,為凸輪的耐磨損設(shè)計(jì)提供理論依據(jù)。最后根據(jù)計(jì)算結(jié)果提取凸輪對(duì)滾輪的作用力,利用Abaqus軟件對(duì)滾輪-滾輪銷進(jìn)行靜力分析。⑷電磁閥電磁力分析利用Ansoft Maxwell軟件建立電磁閥模型并計(jì)算一個(gè)周期的電磁力變化。⑸旁通閥電磁、液固耦合動(dòng)態(tài)分析運(yùn)用Hypermesh建立包含旁通閥、旁通閥套、彈簧盤、銜鐵和螺釘?shù)碾姶�、液固耦合有限元模型。然后利用前述流體動(dòng)力學(xué)計(jì)算結(jié)果,導(dǎo)出旁通閥的流體壓力分布數(shù)據(jù)到有限元模型,再利用電磁閥計(jì)算的電磁力作為載荷條件,對(duì)旁通閥關(guān)閉以及泵油過程進(jìn)行動(dòng)態(tài)力學(xué)分析。本文不僅考慮到泵油階段流體對(duì)固體的影響,還利用多體動(dòng)力學(xué)仿真對(duì)凸輪滾輪進(jìn)行分析,并與接觸應(yīng)力的經(jīng)典算法進(jìn)行比較,以及利用電磁分析對(duì)旁通閥的打開、泵油和關(guān)閉過程進(jìn)行動(dòng)態(tài)分析,系統(tǒng)性地對(duì)整個(gè)噴油泵關(guān)鍵部件進(jìn)行了完整的分析,也為其他類似油泵的分析提出了一個(gè)思路。
[Abstract]:With the rapid development of diesel engine, the pressure of fuel injection is increasing, and the high pressure piston pump is the core of fuel injection system, its structure is compact, the working pressure is high. It is necessary to maintain high efficiency at high pressure. In this paper, the structural strength of high pressure piston pump is studied by means of finite element software and loose coupling method. The methods of systematic research are put forward. The main work is as follows:. Firstly, the fluid dynamics model of high pressure oil pump is established by Hypermesh finite element software. The model is imported into Fluent software for fluid analysis, according to the given conditions and parameters. To calculate the oil pressure change during the oil pump. 2. The analysis of the fluid-solid coupling structure strength of the plunger coupling part of the oil pump. The structural finite element model of the plunger and plunger sleeve is established by using Hypermesh. Secondly, the fluid pressure distribution data of the maximum oil pressure time of plunger and plunger sleeve are derived by using the results of the fluid dynamics calculation mentioned above, and imported into Abaqus software. The oil pressure load is mapped to the solid finite element model to calculate the stress and deformation of the plunger coupling. 3. The structural mechanics analysis of the kinematic combination of cam roller and roller pin is carried out by using Adams multi-body dynamics software. Then the force of roller pin on roller wheel is extracted according to the result of calculation by introducing the oil pressure time curve of the plunger to load and carry on the multi-body dynamics simulation. The static analysis of cam-roller is carried out by using Abaqus software. Secondly, the maximum contact stress calculated by classical Hertz contact theory method is compared with that calculated by finite element method. Then Arc is established. Hard wear equation is used to estimate the wear of cam in a period. It provides a theoretical basis for the wear resistant design of the cam. Finally, the force of the cam on the roller is extracted according to the calculation results. Static Analysis of Roller and Roller Pin by using Abaqus Software. .4 electromagnetic Force Analysis of Solenoid Valve using Ansoft. Maxwell software establishes the solenoid valve model and calculates the electromagnetic force variation of a period of 5. 5 bypass valve electromagnetic. Dynamic analysis of liquid-solid coupling using Hypermesh to establish electromagnetic properties including bypass valve, bypass valve sleeve, spring disc, armature and screw. The fluid pressure distribution data of the bypass valve are derived to the finite element model, and the solenoid force calculated by the solenoid valve is used as the load condition. Dynamic mechanical analysis of bypass valve closure and pump oil process is carried out. This paper not only takes into account the effect of pump fluid on solid, but also makes use of multi-body dynamics simulation to analyze the cam roller. Compared with the classical algorithm of contact stress and the dynamic analysis of the opening, pump oil and closing process of the bypass valve by electromagnetic analysis, the key parts of the whole fuel injection pump are systematically analyzed. Also for other similar oil pump analysis proposed a train of thought.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TH322

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