本文選題：擺動(dòng)液壓缸 + 虛擬樣機(jī)技術(shù)��； 參考：《中南大學(xué)》2011年碩士論文

【摘要】：擺動(dòng)液壓缸是一種通過螺旋傳動(dòng)把直線運(yùn)動(dòng)轉(zhuǎn)變成旋轉(zhuǎn)運(yùn)動(dòng)并因此做功的液壓元件,其結(jié)構(gòu)簡單,傳動(dòng)效率高,能夠在較小的結(jié)構(gòu)尺寸下輸出大扭矩,適用于大扭矩、短力臂的工況。本文對(duì)擺動(dòng)液壓缸進(jìn)行了數(shù)字化設(shè)計(jì)、動(dòng)力學(xué)仿真及關(guān)鍵零部件的有限元分析,研究了滿足不同結(jié)構(gòu)要求、輸出要求的擺動(dòng)液壓缸的虛擬樣機(jī)技術(shù)的實(shí)現(xiàn)問題。主要包括以下幾個(gè)方面的工作： 進(jìn)行了零部件的參數(shù)化建模和虛擬裝配,建立了含兩級(jí)漸開線螺旋副的擺動(dòng)液壓缸數(shù)字樣機(jī)。利用該數(shù)字樣機(jī)進(jìn)行了多體動(dòng)力學(xué)仿真分析,分析結(jié)果表明：系統(tǒng)液壓力與輸出扭矩成正比關(guān)系；在30°-60°的螺旋角區(qū)間,45°附近的漸開線螺旋副傳遞效率最高。 對(duì)擺動(dòng)液壓缸的關(guān)鍵零部件進(jìn)行了受力分析,對(duì)其兩級(jí)漸開線螺旋副進(jìn)行了有限元分析。運(yùn)用NXNastran,建立了兩級(jí)漸開線螺旋副在兩種極限工況下的靜力分析有限元模型,分析得到了各零件在極限工況下的最大應(yīng)力、應(yīng)變,進(jìn)行了零件的剛度、強(qiáng)度校核；分別建立了兩級(jí)螺旋副的內(nèi)外齒輪接觸對(duì)的非線性面-面接觸有限元模型,分析了接觸面的應(yīng)力分布,結(jié)果表明齒面應(yīng)力和齒根應(yīng)力分布較均勻。 對(duì)擺動(dòng)液壓缸輸出端旋轉(zhuǎn)角度進(jìn)行了系列化設(shè)計(jì),設(shè)計(jì)了輸出端旋轉(zhuǎn)角度為90°、180°、270°、360°的系列；選取R5優(yōu)先數(shù)列,對(duì)輸出扭矩進(jìn)行了系列化設(shè)計(jì)。對(duì)系列內(nèi)的擺動(dòng)液壓缸可進(jìn)行零部件的虛擬裝配、兩級(jí)螺旋副的動(dòng)力學(xué)仿真、關(guān)鍵零部件的有限元分析。 應(yīng)用擺動(dòng)液壓缸實(shí)驗(yàn)測(cè)試平臺(tái),進(jìn)行了低轉(zhuǎn)速輸出扭矩與輸入壓力的關(guān)系實(shí)驗(yàn),驗(yàn)證了仿真結(jié)果的正確性。
[Abstract]:Swing hydraulic cylinder is a kind of hydraulic element which transforms straight line motion into rotational motion and thus works through spiral drive. Its structure is simple, its transmission efficiency is high, and it can output large torque in smaller structure size, which is suitable for large torque. The working condition of short arm. In this paper, the digital design, dynamics simulation and finite element analysis of the key parts of the oscillating hydraulic cylinder are carried out, and the realization of the virtual prototyping technology of the swinging hydraulic cylinder which meets the requirements of different structure and output is studied. The main work includes the following aspects: parametric modeling and virtual assembly of parts and components are carried out, and a digital prototype of oscillating hydraulic cylinder with two-stage involute screw pair is established. The simulation results show that the hydraulic pressure of the system is proportional to the output torque, and the transmission efficiency of the involute helical pair is the highest in the range of 30 擄-60 擄. The force of the key parts of the oscillating hydraulic cylinder is analyzed, and the finite element analysis of the two-stage involute helical pair is carried out. The static finite element model of the two-stage involute helical pair under two limit conditions is established by using NXNaSS. The maximum stress and strain of each part under the limit condition are obtained, and the stiffness and strength of the parts are checked. The nonlinear plane-plane contact finite element model of the internal and external gear contact pair of the two-stage spiral pair is established, and the stress distribution of the contact surface is analyzed. The results show that the distribution of tooth surface stress and tooth root stress is more uniform. The rotary angle of the output end of the oscillating hydraulic cylinder is serialized, and the series of the rotary angle of the output end is designed, which is 90 擄/ 180 擄/ 270 擄/ 360 擄, and the output torque is serialized by selecting the R5 priority series. Virtual assembly of components, dynamic simulation of two-stage screw pairs and finite element analysis of key parts can be carried out for the oscillating hydraulic cylinders in the series. The relationship between output torque of low speed and input pressure is tested on the experimental platform of oscillating hydraulic cylinder, and the correctness of the simulation results is verified.
【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】：2011
【分類號(hào)】：TH137.51

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 杜孝杰;雙定子擺動(dòng)液壓馬達(dá)的設(shè)計(jì)與研究[D];燕山大學(xué);2012年

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本文編號(hào)：2041227