本文關(guān)鍵詞：液壓缸雙梁鉸接式剪叉升降平臺布置方式優(yōu)化設計　出處：《蘭州理工大學》2011年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 剪叉機構(gòu) 液壓缸 雙梁鉸接式 運動學 動力學 優(yōu)化設計

【摘要】：液壓缸驅(qū)動的剪叉升降平臺是一種廣泛應用于倉庫、機場、車站、碼頭、舞臺、自動化生產(chǎn)線中的起重機械。它的性能直接決定了起重升降平臺的承重性和舒適性,載物的剪叉升降平臺要求液壓缸活塞推力盡可能小,載人的剪叉升降平臺則要求升降平臺起升速度平穩(wěn)。同時,液壓缸的布置又因有限的安裝空間而受到約束。因此,如何在有限的空間內(nèi)布置剪叉升降平臺的同時滿足起重升降平臺的承重性和舒適性,是提高起重升降平臺的總體性能過程中急需解決的難題。 本課題以雙梁鉸接式這一液壓缸布置方式的剪叉升降平臺為研究對象,對傳統(tǒng)剪叉升降平臺液壓缸布置方式存在的液壓缸活塞推力大,平臺起升速度不平穩(wěn)的問題進行了全面分析,力求尋找出一種在滿足結(jié)構(gòu)設計要求的條件下,能夠減小液壓缸活塞推力,使平臺升降速度穩(wěn)定的液壓缸布置方式。 本文首先利用理論力學對液壓缸驅(qū)動的雙梁鉸接式升降平臺運動學和動力學的研究,得出液壓缸鉸接位置與升降平臺活塞推力及起升速度的關(guān)系式,分析了升降平臺在升降過程中活塞推力、升降速度的變化規(guī)律,確定了影響升降平臺活塞推力、升降速度的優(yōu)化參數(shù)。 其次,通過機械優(yōu)化設計的相關(guān)理論,確定此機械優(yōu)化設計屬于多目標二元約束優(yōu)化設計。通過比較,分別選取相應的優(yōu)化方法,并根據(jù)各自流程圖編寫優(yōu)化程序。分別得出在選定液壓缸的情況下,活塞推力最小、升降速度最穩(wěn)定以及同時滿足活塞推力最小和升降速度最穩(wěn)定三種不同條件下的液壓缸鉸接位置。并對優(yōu)化結(jié)果進行了分析。 最后,針對以上優(yōu)化結(jié)果,對升降平臺升降高度不足的問題,提出新的解決方案,并對解決方案進行比較,最終確定了整個液壓缸驅(qū)動的剪叉升降平臺的液壓缸布置方案。 通過對液壓缸驅(qū)動的雙鉸接剪叉升降平臺的運動學、動力學分析及機械優(yōu)化設計,為進一步減小液壓缸驅(qū)動的剪叉機構(gòu)活塞推力,提高升降平臺速度穩(wěn)定性提供了理論依據(jù)和可行的優(yōu)化設計方法。
[Abstract]:The shear - fork lifting platform driven by hydraulic cylinder is a lifting platform widely used in warehouse , airport , station , dock , stage and automation production line . Its performance directly determines the load - bearing capacity and comfort of lifting platform . The research object is to study the hydraulic cylinder piston thrust in the hydraulic cylinder arrangement mode of the traditional shear fork lifting platform , and to find out a hydraulic cylinder arrangement mode which can reduce the thrust of the piston of the hydraulic cylinder and stabilize the platform lifting speed under the condition of meeting the structural design requirements . In this paper , the kinematics and dynamics of the double - beam articulated lifting platform driven by hydraulic cylinder are studied by using the theory mechanics , and the relation between the hinge position of the hydraulic cylinder and the piston thrust and lifting speed of the lifting platform is obtained . The changing law of the piston thrust and the lifting speed of the lifting platform during the lifting process is analyzed , and the optimization parameters influencing the piston thrust and the lifting speed of the lifting platform are determined . Secondly , based on the theory of mechanical optimization design , it is determined that this mechanical optimization design belongs to multi - objective binary constrained optimization design . By comparison , the corresponding optimization method is selected , and the optimization procedure is written according to the respective flow chart . Finally , aiming at the above optimization results , the problem of insufficient lifting height of the lifting platform is solved , a new solution is put forward , and the solution is compared , and the hydraulic cylinder arrangement scheme of the whole hydraulic cylinder driven scissor lift platform is finally determined . Through the kinematics , dynamics analysis and mechanical optimization design of the double hinged shear fork lifting platform driven by the hydraulic cylinder , the theoretical basis and feasible optimization design method are provided for further reducing the piston thrust of the scissor mechanism driven by the hydraulic cylinder and improving the speed stability of the lifting platform .

【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH211.6

【引證文獻】

相關(guān)期刊論文 前1條

1 胥軍;李剛炎;楊飛;楊保安;;剪叉式升降機舉升機構(gòu)分析與優(yōu)化[J];機械科學與技術(shù);2013年06期

相關(guān)碩士學位論文 前2條

1 牛文歡;新型剪叉式高空作業(yè)平臺關(guān)鍵結(jié)構(gòu)設計研究[D];山東大學;2013年

2 張志顯;40噸機場集裝箱/板升降平臺車設計研究[D];鄭州大學;2013年

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本文編號：1362702