齿轮泵困油过程的分析及实验研究

发布时间：2018-02-15 23:44

本文关键词： 齿轮泵困油容积仿真实验研究　出处：《东北大学》2014年硕士论文　论文类型：学位论文

【摘要】：本课题对齿轮泵的困油过程做了研究,主要进行了理论分析、UG三维建模、FLUENT压力流场分析、实验研究等方面的探索。本文首先对齿轮泵的瞬时流量及容积效率进行分析,并建立了齿轮泵困油容积变化规律方程,得出困油容积变化曲线近似为二次函数的结论。然后通过三维软件UG对齿轮泵进行建模,分析齿轮泵困油面积的变化规律,利用4ATLAB对所测数据进行多项式拟合,得到了齿轮泵困油面积变化规律曲线,并利用所测数据根据液体体积弹性模量公式得到困油压力在理论上的变化规律曲线；通过FLUENT对齿轮泵困油区域的压力场进行仿真,得到齿轮泵困油压力变化云图。设计液压系统原理图,以仿真结果为依据,对齿轮泵进行改装,将卸荷槽用所设计的盖板挡住,通过UG确定在困油区域压缩过程中所设计孔的位置,并进行实验台的搭建,对齿轮泵困油区域压缩过程的油液进行实际测量。对实验获得的数据进行处理分析可知,在空载时所测流量与理论流量相差较大,说明改装后齿轮泵容积效率比较低,困油区域的油液并没有通过设计的油路完全排出,除了存在泄漏以外,还与齿轮泵工作工程中产生振动有关；通过加载实验所测数据分析,压力较低时,所测油液的体积变化较平缓,随着压力的调高,所测油液的体积越来越小,并且数值波动较大,说明压力的变化对实验结果产生较大影响,所测流量也随着压力的升高减小的越来越快。
[Abstract]:In this paper, the process of gear pump is studied, and the theoretical analysis of UG 3D modeling and fluent pressure flow field analysis, experimental study and so on are carried out. Firstly, the instantaneous flow rate and volumetric efficiency of gear pump are analyzed in this paper. The equation of the change law of the trapped oil volume of gear pump is established, and the conclusion that the change curve of the trapped oil volume is approximate to the quadratic function is obtained. Then, the gear pump is modeled by UG software, and the variation law of the trapped oil area of the gear pump is analyzed. By polynomial fitting of the measured data by 4MATLAB, the curve of the variation law of the trapped oil area of the gear pump is obtained, and the theoretical variation curve of the trapped oil pressure is obtained by using the measured data according to the formula of the volume elastic modulus of the liquid. The pressure field of gear pump is simulated by FLUENT, and the change of gear pump pressure is obtained. Based on the simulation results, the hydraulic system principle diagram is designed and the gear pump is refitted to block the unloading slot with the designed cover plate. Through UG to determine the position of the designed hole in the compression process of the trapped oil area, and to build the experimental bench, to measure the oil in the compression process of the gear pump, and to process and analyze the data obtained from the experiment. The difference between the measured flow rate and the theoretical flow rate in the absence of load shows that the volume efficiency of the modified gear pump is relatively low, and the oil in the trapped oil area is not completely discharged through the designed oil path, except for the leakage. Through the analysis of the data measured in the loading experiment, the volume change of the measured oil is more gentle when the pressure is lower, and the volume of the oil measured becomes smaller and smaller with the increase of the pressure. The variation of pressure has a great influence on the experimental results, and the measured flow rate decreases more and more rapidly with the increase of pressure.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH325

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