本文關(guān)鍵詞：深海油壓動(dòng)力源液壓泵效率研究　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 深海 齒輪泵 效率 攪油損失 CFD

【摘要】：液壓泵是深海油壓動(dòng)力源的核心部件,其性能決定了動(dòng)力源的使用效果。深海高壓、低溫的特殊環(huán)境勢(shì)必會(huì)對(duì)液壓泵效率造成極大的影響,而效率是評(píng)價(jià)液壓泵性能的重要技術(shù)指標(biāo),因此研究深海環(huán)境對(duì)液壓泵效率的影響尤為重要。本文以11kW深海油壓動(dòng)力源液壓泵為研究對(duì)象,對(duì)其效率進(jìn)行了研究,主要包括以下內(nèi)容:(1)基于深海液壓泵效率損失理論,對(duì)主要效率影響因素及其變化規(guī)律展開研究。確定了深海油壓動(dòng)力源的效率損失主要來(lái)自液壓泵的損失,液壓油的粘度、密度等屬性參數(shù)是影響液壓泵效率的主要因素,分析了不同深海環(huán)境對(duì)主要影響因素的影響。(2)利用CFD與ADAMS動(dòng)力學(xué)仿真結(jié)合的方法,研究了不同深海環(huán)境因素(環(huán)境壓力及海水溫度)及不同工況對(duì)內(nèi)嚙合齒輪泵效率的影響,結(jié)果表明:深海環(huán)境下,海水深度越深,齒輪泵的效率越低。環(huán)境壓力與海水溫度的變化對(duì)齒輪泵的效率均有一定影響,且前者的影響更為顯著。隨著海水深度的增加,環(huán)境壓力對(duì)效率的影響在轉(zhuǎn)速大于1900r/min時(shí)較為明顯,效率降低6%,在轉(zhuǎn)速小于1900r/min時(shí),效率僅降低3%;海水溫度對(duì)效率的影響在轉(zhuǎn)速小于1900r/min時(shí)較為明顯,效率降低4%,轉(zhuǎn)速大于1900r/min時(shí),效率僅降低2.5%。(3)利用CFD方法對(duì)外嚙合齒輪泵進(jìn)行仿真,提出了通過(guò)困油壓力預(yù)測(cè)齒輪泵攪油損失的計(jì)算方法,分析了一個(gè)困油周期內(nèi)攪油損失隨轉(zhuǎn)速、工作壓力的變化情況以及不同深海環(huán)境對(duì)攪油損失的影響規(guī)律。結(jié)果表明.：攪油損失主要受到困油壓力的影響,并隨著轉(zhuǎn)速和工作壓力的增大而增大。隨著海水深度的加深,攪油損失也隨之增大,在海水深度低于2300m時(shí),海水溫度對(duì)攪油損失的影響更顯著,而在2300m之后,環(huán)境壓力的影響更顯著;在深海4500m的環(huán)境中,與大氣環(huán)境相比,只考慮環(huán)境壓力的影響,攪油損失增大了 5.45倍,只考慮海水溫度的影響,攪油損失增大了 3.86倍。(4)進(jìn)行了液壓泵和動(dòng)力源的地面臺(tái)架試驗(yàn)以及動(dòng)力源整機(jī)的深海環(huán)境模擬試驗(yàn),通過(guò)試驗(yàn)得到的效率結(jié)果與仿真結(jié)果近似,驗(yàn)證了仿真方法的正確性。
[Abstract]:Hydraulic pump is the core component of deep-sea oil pressure power source, and its performance determines the use effect of power source. The special environment of deep-sea high pressure and low temperature will have a great impact on the efficiency of hydraulic pump. Efficiency is an important technical index to evaluate the performance of hydraulic pump, so it is particularly important to study the effect of deep-sea environment on hydraulic pump efficiency. The efficiency is studied, including the following: 1) based on the theory of efficiency loss of deep-sea hydraulic pump. The main factors affecting efficiency and its variation law are studied. It is determined that the loss of efficiency of deep-sea oil pressure power source mainly comes from the loss of hydraulic pump and the viscosity of hydraulic oil. Density and other parameters are the main factors that affect the efficiency of hydraulic pump. The influence of different deep-sea environment on the main factors is analyzed. (2) the method of CFD and ADAMS dynamic simulation is used. The effects of different deep-sea environmental factors (environmental pressure and seawater temperature) and different working conditions on the efficiency of the internal gear pump are studied. The results show that the deeper the sea water is in the deep-sea environment. The lower the efficiency of gear pump, the lower the efficiency of gear pump. The change of environmental pressure and seawater temperature have certain influence on the efficiency of gear pump, and the former has more obvious effect, with the increase of sea water depth. The effect of ambient pressure on efficiency is more obvious when the rotational speed is greater than 1900 r / min, and the efficiency is reduced by 6%. When the rotational speed is less than 1900 r / min, the efficiency decreases only 3%. The effect of seawater temperature on efficiency is obvious when the rotational speed is less than 1900 r / min, the efficiency is reduced by 4%, and the rotational speed is greater than 1900 r / min. The CFD method is used to simulate the external meshing gear pump, and the calculation method for predicting the oil loss of the gear pump by the pressure of trapped oil is put forward. The variation of stirring loss with rotation speed, working pressure and the influence of different deep-sea environment on the oil stirring loss are analyzed. The results show that the oil stirring loss is mainly affected by the trapped oil pressure. With the increase of rotational speed and working pressure, the loss of oil stirring increases with the depth of seawater. When the depth of seawater is less than 2300m, the influence of seawater temperature on the loss of oil stirring is more significant. After 2300m, the influence of environmental pressure was more significant. In the deep sea environment of 4500m, compared with the atmospheric environment, only the influence of environmental pressure is considered, the loss of stirring oil increases by 5.45 times, and only the effect of seawater temperature is considered. The loss of stirring oil increased by 3.86 times. 4) the ground test of hydraulic pump and power source and the deep sea environment simulation test of power source machine were carried out. The efficiency result obtained by the experiment was similar to the simulation result. The correctness of the simulation method is verified.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH137.51

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