本文選題：軟啟動　切入點：差動行星輪系　出處：《湖南大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來，，隨著國民經(jīng)濟的發(fā)展，大功率重載機械設(shè)備在各個行業(yè)應(yīng)用很廣泛。大功率電機負載啟動會產(chǎn)生5～7倍于額定電流的啟動電流，對電機、電網(wǎng)產(chǎn)生很大沖擊。大功率設(shè)備瞬時斷電停機方式會給設(shè)備帶來較強沖擊。多工況交替的大功率設(shè)備平穩(wěn)運行也是個大難題。要解決上述問題，需要對大功率設(shè)備采用真正的可控軟啟動/無級調(diào)速技術(shù)。本文采用差動行星輪系傳動機構(gòu)，并結(jié)合流體傳動控制技術(shù)對整個機械傳動裝置進行控制，既實現(xiàn)主電機的空載啟動，又采用流體傳動的連續(xù)可控性，對重載機械設(shè)備的工作機構(gòu)實現(xiàn)軟啟動、無級調(diào)速、軟停機以及自重下放等功能。本文可為大功率設(shè)備的可控機械軟啟動/調(diào)速技術(shù)奠定良好的理論基礎(chǔ)，對我國大功率重載機械設(shè)備關(guān)鍵共性技術(shù)的發(fā)展具有重要意義。 本文主要開展的工作如下： 1、研究了機電液軟啟動系統(tǒng)的工作原理，對工作機構(gòu)的軟啟動、軟停機、自重下放各階段進行了動力學(xué)分析，建立數(shù)學(xué)模型，對數(shù)學(xué)模型進行數(shù)字化仿真,得到了液壓泵出口壓力的變化規(guī)律。 2、把機械傳動系統(tǒng)的三維裝配模型導(dǎo)入到ADAMS動力學(xué)仿真軟件中，建立動力學(xué)仿真模型并進行仿真試驗。仿真結(jié)果表明，工作機構(gòu)的軟啟動、軟停機、自重下放各階段的運動規(guī)律與設(shè)計值基本相符，驗證了數(shù)學(xué)模型的正確性。 3、以高速級行星輪系、低速級行星輪系和錐齒輪對的體積為優(yōu)化目標，在滿足外界要求的約束條件下，建立優(yōu)化數(shù)學(xué)模型。用MATLAB軟件中的fmincon函數(shù)來對數(shù)學(xué)模型進行優(yōu)化求解，得到最優(yōu)結(jié)構(gòu)參數(shù)，減少了金屬材料用量，降低了生產(chǎn)制造成本。
[Abstract]:In recent years, with the development of national economy, high-power heavy-duty mechanical equipment is widely used in various industries. The power grid has a great impact. The instantaneous shutdown mode of high-power equipment will bring a strong impact to the equipment. The smooth operation of high-power equipment with alternate multi-working conditions is also a big problem. It is necessary to adopt the real controllable soft start / stepless speed regulation technology for the high power equipment. In this paper, the differential planetary gear train transmission mechanism and the fluid transmission control technology are used to control the whole mechanical transmission device. It not only realizes the main motor's no-load start, but also adopts the continuous controllability of the fluid drive, realizes the soft start to the working mechanism of the heavy duty mechanical equipment, and stepless speed regulation, This paper can lay a good theoretical foundation for the soft-start / speed regulation technology of controllable machinery for high-power equipment, and it is of great significance for the development of key common technologies of high-power and heavy-duty mechanical equipment in China. The main work of this paper is as follows:. The main contents are as follows: 1. The working principle of the electromechanical and hydraulic soft start system is studied. The dynamic analysis of the soft start, soft stop and download of the working mechanism is carried out, and the mathematical model is established, and the digital simulation of the mathematical model is carried out. The variation law of outlet pressure of hydraulic pump is obtained. 2. The 3D assembly model of the mechanical transmission system is introduced into ADAMS dynamic simulation software, and the dynamic simulation model is established and the simulation experiment is carried out. The simulation results show that the working mechanism starts and stops. The law of movement in each stage of weight-down is basically consistent with the design value, which verifies the correctness of the mathematical model. 3. Taking the volume of high speed planetary gear train, low speed planetary gear train and bevel gear pair as the optimization target, the optimization mathematical model is established under the constraint condition which meets the external requirements. The optimization model is solved by fmincon function in MATLAB software. The optimum structure parameters are obtained, the amount of metal material is reduced, and the production cost is reduced.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TH132

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