深海油压动力源液压泵效率研究

发布时间：2018-01-07 16:23

本文关键词：深海油压动力源液压泵效率研究　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：液压泵是深海油压动力源的核心部件,其性能决定了动力源的使用效果。深海高压、低温的特殊环境势必会对液压泵效率造成极大的影响,而效率是评价液压泵性能的重要技术指标,因此研究深海环境对液压泵效率的影响尤为重要。本文以11kW深海油压动力源液压泵为研究对象,对其效率进行了研究,主要包括以下内容:(1)基于深海液压泵效率损失理论,对主要效率影响因素及其变化规律展开研究。确定了深海油压动力源的效率损失主要来自液压泵的损失,液压油的粘度、密度等属性参数是影响液压泵效率的主要因素,分析了不同深海环境对主要影响因素的影响。(2)利用CFD与ADAMS动力学仿真结合的方法,研究了不同深海环境因素(环境压力及海水温度)及不同工况对内啮合齿轮泵效率的影响,结果表明:深海环境下,海水深度越深,齿轮泵的效率越低。环境压力与海水温度的变化对齿轮泵的效率均有一定影响,且前者的影响更为显著。随着海水深度的增加,环境压力对效率的影响在转速大于1900r/min时较为明显,效率降低6%,在转速小于1900r/min时,效率仅降低3%;海水温度对效率的影响在转速小于1900r/min时较为明显,效率降低4%,转速大于1900r/min时,效率仅降低2.5%。(3)利用CFD方法对外啮合齿轮泵进行仿真,提出了通过困油压力预测齿轮泵搅油损失的计算方法,分析了一个困油周期内搅油损失随转速、工作压力的变化情况以及不同深海环境对搅油损失的影响规律。结果表明.：搅油损失主要受到困油压力的影响,并随着转速和工作压力的增大而增大。随着海水深度的加深,搅油损失也随之增大,在海水深度低于2300m时,海水温度对搅油损失的影响更显著,而在2300m之后,环境压力的影响更显著;在深海4500m的环境中,与大气环境相比,只考虑环境压力的影响,搅油损失增大了 5.45倍,只考虑海水温度的影响,搅油损失增大了 3.86倍。(4)进行了液压泵和动力源的地面台架试验以及动力源整机的深海环境模拟试验,通过试验得到的效率结果与仿真结果近似,验证了仿真方法的正确性。
[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.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH137.51

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