本文關(guān)鍵詞： 氣液聯(lián)合式破碎錘 數(shù)學(xué)模型 過流面積 仿真分析 工作性能　出處：《中南大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：氣液聯(lián)合式破碎錘是一種高效率的液壓碎石機(jī)械,它以結(jié)構(gòu)緊湊、能量密度高、適應(yīng)性強(qiáng)和可靠性高等特點(diǎn)在破碎機(jī)械中占據(jù)重要地位。氣液聯(lián)合式?jīng)_擊器是該類破碎錘的核心工作機(jī)構(gòu),其運(yùn)動(dòng)特性和工作性能對(duì)破碎效率的影響很大。本文以山河智能SWHB系列氣液聯(lián)合式破碎錘為研究對(duì)象,對(duì)該類破碎錘的數(shù)學(xué)模型、仿真模型和運(yùn)動(dòng)特性進(jìn)行較為深入和細(xì)致的研究,主要工作如下： 運(yùn)用液壓沖擊機(jī)構(gòu)的設(shè)計(jì)理論對(duì)氣液聯(lián)合式破碎錘進(jìn)行運(yùn)動(dòng)特性分析,得到了各運(yùn)動(dòng)件的運(yùn)動(dòng)學(xué)方程；提出一種利用液壓容腔的分析方法對(duì)活塞前、后腔和配流閥高壓腔進(jìn)行分狀態(tài)研究,建立了相應(yīng)的數(shù)學(xué)模型。 根據(jù)氣液聯(lián)合式破碎錘的工作特性,得到建立模型的原則和方法。分析液壓沖擊器的內(nèi)部結(jié)構(gòu)和運(yùn)動(dòng)特性,提出利用計(jì)算過流面積的方法,結(jié)合該類破碎錘的實(shí)際工況,利用AMESim軟件搭建了破碎錘的仿真模型。 以SWHB58氣液聯(lián)合式破碎錘為實(shí)驗(yàn)對(duì)象,利用氣壓法進(jìn)行了實(shí)驗(yàn)測(cè)試,將實(shí)驗(yàn)結(jié)果與仿真結(jié)果對(duì)比分析,驗(yàn)證了模型的真實(shí)性和準(zhǔn)確性。在此基礎(chǔ)上,分別改變初始充氣壓力和輸入流量,利用模型進(jìn)行仿真,得到了沖擊性能的曲線,研究了初始充氣壓力和輸入流量對(duì)該類破碎錘工作性能的影響。論文同時(shí)還針對(duì)不同活塞質(zhì)量和前腔液壓油作用面積、配流閥正負(fù)開口形式以及蓄能器和氮?dú)馐胰莘e大小等進(jìn)行了研究,探討了關(guān)鍵結(jié)構(gòu)參數(shù)對(duì)工作性能的影響規(guī)律。 本文的研究方法為深入分析破碎錘的運(yùn)行規(guī)律提供了一種新的思路,研究結(jié)果對(duì)破碎錘的設(shè)計(jì)與生產(chǎn)具有一定的實(shí)用價(jià)值和理論指導(dǎo)意義。
[Abstract]:The gas-liquid combined crushing hammer is a kind of high efficiency hydraulic crushed stone machinery, which is compact in structure and high in energy density. The characteristics of high adaptability and high reliability occupy an important position in the crushing machinery. The gas-liquid combined impactor is the core working mechanism of this kind of crushing hammer. The movement characteristics and working performance of the hammer have great influence on the crushing efficiency. In this paper, the mathematical model of this kind of hammer is studied by taking the intelligent SWHB series of gas-liquid combined crushing hammer as the research object. The simulation model and motion characteristics are studied deeply and meticulously. The main work is as follows: Based on the design theory of hydraulic impact mechanism, the motion characteristics of gas-liquid combined crushing hammer are analyzed, and the kinematics equations of each moving part are obtained. In this paper, a method of analyzing hydraulic chamber is put forward to study the state of piston front, back cavity and high pressure chamber of distribution valve, and the corresponding mathematical model is established. According to the working characteristics of gas-liquid combined crushing hammer, the principle and method of establishing model are obtained. The internal structure and motion characteristics of hydraulic impactor are analyzed, and the method of calculating overcurrent area is put forward. According to the actual working conditions of this kind of hammer, the simulation model of the hammer is built by using AMESim software. Taking the SWHB58 gas-liquid combined crushing hammer as the experimental object, the experimental results are compared with the simulation results by using the air pressure method to verify the authenticity and accuracy of the model. The initial inflatable pressure and the input flow are changed, and the impact performance curves are obtained by simulation using the model. The effects of initial gas pressure and input flow rate on the working performance of this kind of hammer are studied. At the same time, different piston mass and working area of front chamber hydraulic oil are also studied. The positive and negative opening form of flow distribution valve and the volume size of accumulator and nitrogen chamber were studied, and the influence of key structural parameters on the working performance was discussed. The research method in this paper provides a new way of thinking for analyzing the running rule of crushing hammer, and the research results have certain practical value and theoretical guiding significance for the design and production of crushing hammer.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH69

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