本文選題：液壓挖掘機(jī)　切入點(diǎn)：回轉(zhuǎn)系統(tǒng)　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：摘要：回轉(zhuǎn)系統(tǒng)作為液壓挖掘機(jī)的重要子系統(tǒng)之一,其工作性能直接影響挖掘機(jī)整機(jī)性能。大型液壓挖掘機(jī)回轉(zhuǎn)系統(tǒng)具有典型大慣性負(fù)載系統(tǒng)的特點(diǎn)。由于整機(jī)質(zhì)量和負(fù)載質(zhì)量大,其回轉(zhuǎn)系統(tǒng)的啟動性能較差。本文對大型液壓挖掘機(jī)回轉(zhuǎn)系統(tǒng)的啟動特性進(jìn)行理論研究和仿真分析,為改善大型液壓挖掘機(jī)回轉(zhuǎn)系統(tǒng)啟動節(jié)能性能找到了有效途徑。論文的主要工作如下： 對大型液壓挖掘機(jī)回轉(zhuǎn)啟動時回轉(zhuǎn)平臺的運(yùn)動規(guī)律、回轉(zhuǎn)系統(tǒng)的負(fù)載特性、回轉(zhuǎn)與動臂液壓回路的流量分配特性進(jìn)行分析。 利用液壓分析軟件AMESim和動力學(xué)分析軟件ADAMS建立液壓挖掘機(jī)回轉(zhuǎn)系統(tǒng)的機(jī)械-液壓聯(lián)合仿真模型,并通過實(shí)驗(yàn)對仿真模型的正確性進(jìn)行驗(yàn)證。仿真分析回轉(zhuǎn)平臺轉(zhuǎn)動慣量、摩擦力矩、馬達(dá)排量、減速比以及回轉(zhuǎn)溢流閥設(shè)定的壓力對回轉(zhuǎn)啟動性能的影響。通過仿真分析,得到了回轉(zhuǎn)啟動溢流損失過大的主要原因。 針對回轉(zhuǎn)啟動溢流損失過大的問題,提出了回轉(zhuǎn)溢流切斷控制回路的優(yōu)化方案,搭建了優(yōu)化方案的機(jī)械-液壓聯(lián)合仿真模型,利用該模型分別對回轉(zhuǎn)平臺180單回轉(zhuǎn)動作和回轉(zhuǎn)與動臂下降復(fù)合動作進(jìn)行了聯(lián)合仿真,將仿真結(jié)果與優(yōu)化前的仿真結(jié)果進(jìn)行對比分析,優(yōu)化方案在不影響回轉(zhuǎn)啟動性能的情況下,節(jié)能效果顯著。
[Abstract]:Abstract: Rotary system is one of the important subsystems of hydraulic excavator. Its working performance directly affects the whole machine performance of excavator. The rotary system of large hydraulic excavator has the characteristics of typical large inertial load system. The starting performance of the rotary system is poor. In this paper, the starting characteristics of the rotary system of the large hydraulic excavator are studied theoretically and simulated. An effective way to improve the starting energy saving performance of the rotary system of large hydraulic excavator is found. The main work of this paper is as follows:. This paper analyzes the motion law of the rotary platform, the load characteristics of the rotary system and the flow distribution characteristics of the hydraulic circuit of the rotary and arm during the rotary start-up of the large hydraulic excavator. By using the hydraulic analysis software AMESim and the dynamics analysis software ADAMS, the mechanical-hydraulic joint simulation model of the rotary system of hydraulic excavator is established, and the correctness of the simulation model is verified by experiments. The moment of inertia of the rotary platform is simulated and analyzed. The effects of friction torque, motor displacement, deceleration ratio and pressure set by rotary relief valve on the performance of rotary starting are analyzed. Aiming at the problem of excessive overflow loss in rotary start-up, the optimization scheme of rotary overflow cutting control loop is put forward, and the combined mechanical-hydraulic simulation model of optimization scheme is set up. The model is used to simulate the single rotation action of the platform 180 and the composite action of the rotation and arm descent respectively. The simulation results are compared with the simulation results before optimization. The optimized scheme has remarkable energy-saving effect without affecting the performance of rotary startup.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU621

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 何西泠;;回轉(zhuǎn)支承裝置的摩擦阻力矩[J];中國工程機(jī)械學(xué)報;2006年02期

2 郝鵬;何清華;張大慶;;負(fù)載敏感系統(tǒng)測試及特性分析[J];中國工程機(jī)械學(xué)報;2006年03期

3 李宏寶;;中國挖掘機(jī)械行業(yè)2010年市場情況分析[J];工程機(jī)械;2011年02期

4 李建啟;液壓挖掘機(jī)回轉(zhuǎn)節(jié)能裝置的運(yùn)動特性[J];河北建筑工程學(xué)院學(xué)報;1994年02期

5 李建啟;液壓挖掘機(jī)回轉(zhuǎn)節(jié)能裝置的試驗(yàn)研究[J];河北建筑工程學(xué)院學(xué)報;1994年03期

6 劉崇;觀拉斯韋加斯博覽會 談液壓挖掘機(jī)發(fā)展[J];建筑機(jī)械化;2002年04期

7 黃宗益,葉偉,李興華;液壓挖掘機(jī)液壓系統(tǒng)概述[J];建筑機(jī)械化;2003年09期

8 葉偉,黃宗益,李興華;挖掘機(jī)液壓系統(tǒng)泵閥組合[J];建筑機(jī)械化;2003年10期

9 黃宗益,范基,葉偉;挖掘機(jī)回轉(zhuǎn)液壓操縱回路(一)[J];建筑機(jī)械化;2004年01期

10 黃宗益,楊穎子;東芝負(fù)載敏感壓力補(bǔ)償挖掘機(jī)液壓系統(tǒng)[J];建筑機(jī)械化;2005年05期

相關(guān)博士學(xué)位論文 前1條

1 張樹忠;基于液壓式能量回收的挖掘機(jī)動臂節(jié)能研究[D];西南交通大學(xué);2011年

，

本文編號：1619511