【摘要】：剪叉式液壓升降平臺，作為液壓升降平臺中的一種重要型式，是一種多功能的起重裝卸機(jī)械設(shè)備，因其結(jié)構(gòu)簡單緊湊、操作方便、升降平穩(wěn)、載重量大、安裝維護(hù)簡單等，在工廠、現(xiàn)代物流、各類高空作業(yè)以及各類大型設(shè)備的制造及維護(hù)中得到了相當(dāng)廣泛的應(yīng)用。但是，傳統(tǒng)生產(chǎn)方式研發(fā)制造的升降平臺由于缺少理論依據(jù)，多為經(jīng)驗生產(chǎn)，其外形較為笨重，各項性能都有待提高，所以通過科學(xué)的手段進(jìn)行分析計算從而對傳統(tǒng)升降平臺的外形與性能進(jìn)行優(yōu)化，得到各方面性能都最優(yōu)的產(chǎn)品已經(jīng)迫在眉睫。 本論文通過提供的相應(yīng)型號剪叉式液壓升降平臺的外形尺寸與技術(shù)參數(shù)，對升降平臺進(jìn)行穩(wěn)定性計算，并確定了相關(guān)參數(shù)。 利用CAD軟件Pro/E建立了實體模型并將其導(dǎo)入ADAMS中，建立樣機(jī)模型，通過對特定型號的升降平臺系統(tǒng)進(jìn)行動態(tài)過程的仿真分析，得到了升降平臺在運(yùn)動過程中的質(zhì)心位移、質(zhì)心速度、質(zhì)心橫向速度、質(zhì)心縱向速度和平臺上方各銷軸的受力變化以及平臺下方各銷軸的受力變化。通過分析表明升降平臺在正常工況條件下的運(yùn)動是平穩(wěn)的，但存在一些速度波動，確定了其產(chǎn)生相應(yīng)波動的原因。 利用ANSYS軟件對剪叉式液壓升降平臺的剪叉臂進(jìn)行了有限元法強(qiáng)度分析。在此的基礎(chǔ)上，通過ANSYS參數(shù)化設(shè)計語言APDL，利用其優(yōu)化設(shè)計模塊進(jìn)行結(jié)構(gòu)優(yōu)化設(shè)計。導(dǎo)出各設(shè)計變量，狀態(tài)變量以及目標(biāo)函數(shù)的變化曲線圖，，給出了最終的優(yōu)化結(jié)果。結(jié)果表明：優(yōu)化后剪叉臂總體積由原來的6661mm3減少到2291.3mm3，降低了65.6%，這將大大降低生產(chǎn)過程中的材料消耗。
[Abstract]:As an important type of hydraulic lifting platform, shear-fork type hydraulic lifting platform is a kind of multi-functional lifting and handling machinery, because of its simple and compact structure, convenient operation, stable lifting, large load, simple installation and maintenance, etc. It has been widely used in factories, modern logistics, all kinds of high-altitude operations and the manufacture and maintenance of large-scale equipments. However, due to the lack of theoretical basis for the development and manufacture of the lifting platform in the traditional mode of production, most of it is experienced production, and its shape is relatively heavy, and all of its performance needs to be improved. So it is urgent to optimize the shape and performance of the traditional lifting platform through scientific analysis and calculation, and get the product with the best performance in all aspects. In this paper, the stability of the lifting platform is calculated by the shape and technical parameters of the corresponding shear-fork hydraulic lift platform, and the relevant parameters are determined. The entity model is established by using CAD software Pro/E and imported into ADAMS, and the prototype model is established. Through the simulation and analysis of the dynamic process of a specific type of lifting platform system, the displacement of the center of mass in the moving process of the lifting platform is obtained. Centroid velocity, transverse velocity of center of mass, longitudinal velocity of center of mass, force change of pin shaft above platform and force change of pin shaft under platform. The analysis shows that the motion of the platform is stable under the normal working conditions, but there are some velocity fluctuations, and the reason of the corresponding fluctuation is determined. The strength of the shear arm of the hydraulic lifting platform is analyzed by finite element method with ANSYS software. On this basis, the structure optimization design is carried out by ANSYS parametric design language APDL, using its optimization design module. The curves of design variables, state variables and objective functions are derived, and the final optimization results are given. The results show that the total volume of the shearing fork arm is reduced from the original 6661mm3 to 2291.3mm ~ 3, and the total volume of the shearing fork arm is reduced by 65.6mm, which will greatly reduce the material consumption in the production process.
【學(xué)位授予單位】：山東輕工業(yè)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH211.6

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