本文選題：液壓泵試驗(yàn) + 功率回收��； 參考：《中南大學(xué)》2011年碩士論文

【摘要】：目前液壓元件的性能和可靠性是制約國內(nèi)液壓技術(shù)發(fā)展的瓶頸,而液壓泵是液壓系統(tǒng)的核心元件,其性能直接影響整個系統(tǒng)的工作特性,因此搭建對其進(jìn)行檢測且具有良好性能的試驗(yàn)系統(tǒng)至關(guān)重要。傳統(tǒng)的液壓泵性能試驗(yàn)系統(tǒng)基本采用非功率回收方式,即采用耗能元件對液壓泵進(jìn)行加載,將能量全部轉(zhuǎn)化成熱能耗散,且需另外增加大規(guī)模的冷卻系統(tǒng),試驗(yàn)系統(tǒng)能耗大,試驗(yàn)成本高,幾乎不可能實(shí)現(xiàn)對大功率液壓泵的長時間壽命試驗(yàn)。而功率回收試驗(yàn)系統(tǒng)能將60%以上的能量回收,節(jié)能效果顯著,裝機(jī)功率小,布局靈活,因此一直受到人們的關(guān)注,應(yīng)用范圍越來越廣泛。但由于功率回收式液壓泵性能試驗(yàn)系統(tǒng)的研究處于起步階段,試驗(yàn)系統(tǒng)還存在著諸如提高加載壓力調(diào)節(jié)性能、降低壓力脈動、合理匹配系統(tǒng)、提高回收效率、完善系統(tǒng)試驗(yàn)功能等一系列的問題亟待研究解決。因此,本文針對上述問題,以新研制的混凝土輸送泵用液壓泵為試驗(yàn)對象,設(shè)計(jì)功率回收式液壓泵性能試驗(yàn)系統(tǒng),并對其性能進(jìn)行研究,主要工作內(nèi)容如下： 1.綜述了現(xiàn)有液壓泵性能試驗(yàn)系統(tǒng)及其特點(diǎn)。根據(jù)液壓泵試驗(yàn)系統(tǒng)的試驗(yàn)內(nèi)容和要求,對液壓泵的試驗(yàn)系統(tǒng)的類型、工作原理進(jìn)行分析總結(jié),指出了存在的主要缺陷,并明確了功率回收式液壓泵試驗(yàn)系統(tǒng)的工作原理和特性要求。 2.對功率回收式液壓泵性能試驗(yàn)系統(tǒng)進(jìn)行了設(shè)計(jì)及性能分析。通過理論分析比較了變頻調(diào)速、馬達(dá)變量、外部補(bǔ)油三種加載壓力調(diào)節(jié)方式的調(diào)節(jié)特性,深入研究系統(tǒng)的流量脈動和壓力脈動,提出了降低系統(tǒng)壓力脈動的方案,設(shè)計(jì)了功率回收式液壓泵性能試驗(yàn)系統(tǒng),同時對系統(tǒng)的匹配要求和回收效率等性能進(jìn)行了詳細(xì)的分析計(jì)算。 3.建立仿真模型,對系統(tǒng)的動態(tài)性能進(jìn)行仿真分析。根據(jù)功率鍵合圖法建立了系統(tǒng)的功率鍵合圖模型、數(shù)學(xué)模型和Simulink仿真模型,代入仿真參數(shù),對系統(tǒng)的加載壓力的調(diào)節(jié)特性、壓力脈動、沖擊試驗(yàn)特性等進(jìn)行仿真研究。 4.在功率回收式液壓泵實(shí)驗(yàn)臺上,進(jìn)行加載特性實(shí)驗(yàn),進(jìn)一步驗(yàn)證了功率回收式液壓泵試驗(yàn)系統(tǒng)具有良好的節(jié)能效果和試驗(yàn)性能。
[Abstract]:At present, the performance and reliability of hydraulic components are the bottleneck restricting the development of domestic hydraulic technology. The hydraulic pump is the core component of hydraulic system, and its performance directly affects the working characteristics of the whole system. Therefore, it is very important to build a testing system with good performance. The traditional hydraulic pump performance test system basically adopts the non-power recovery method, that is, the energy dissipation element is used to load the hydraulic pump, all the energy is converted into heat energy dissipation, and the large scale cooling system is also needed to increase the energy consumption of the test system. The test cost is high and it is almost impossible to realize the long life test of high power hydraulic pump. But the power recovery test system can recover more than 60% of the energy, the energy-saving effect is remarkable, the installation power is small, the layout is flexible, so it has been paid attention to, and the application scope is more and more extensive. However, since the research of performance test system of power recovery hydraulic pump is still in its infancy, there are still some problems in the test system, such as improving the performance of loading pressure regulation, reducing pressure fluctuation, reasonably matching the system, and improving the recovery efficiency. A series of problems, such as perfecting the system test function, need to be solved urgently. Therefore, in order to solve the above problems, this paper takes the newly developed hydraulic pump for concrete transport pump as the test object, designs the power recovery hydraulic pump performance test system, and studies its performance. The main work is as follows: 1. The existing hydraulic pump performance test system and its characteristics are reviewed. According to the test contents and requirements of hydraulic pump test system, the types and working principles of hydraulic pump test system are analyzed and summarized, and the main defects are pointed out. The working principle and characteristic requirements of the power recovery hydraulic pump test system are also clarified. 2. The performance test system of power recovery hydraulic pump is designed and analyzed. Through the theoretical analysis and comparison of the regulating characteristics of three loading pressure regulation modes, frequency conversion speed regulation, motor variable and external oil filling, the flow pulsation and pressure pulsation of the system are studied in depth, and the scheme to reduce the pressure pulsation of the system is put forward. The performance test system of power recovery hydraulic pump is designed, and the matching requirements and recovery efficiency of the system are analyzed and calculated in detail. 3. The simulation model is established and the dynamic performance of the system is simulated and analyzed. According to the power bond graph method, the power bond graph model, mathematical model and Simulink simulation model of the system are established, and the simulation parameters are substituted in the system. The characteristics of load pressure adjustment, pressure pulsation and impact test are simulated and studied. 4. The load characteristic experiment was carried out on the power recovery hydraulic pump test bench, which further proved that the power recovery hydraulic pump test system has good energy saving effect and test performance.
【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】：2011
【分類號】：TH137.51

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 尹偉龍;商用飛機(jī)液壓元件研究平臺開發(fā)[D];浙江大學(xué);2013年

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本文編號：1807515