为了分析齿轮油泵内部的非定常压力特征，基于标准k-ε湍流模型和Immersed solid侵入式实体模型，采用流场分析软件CFX对齿轮油泵内部流场进行三维非定常计算，通过设置监测点，得到不同位置的压力脉动结果,并对压力脉动数据进行频域分析。结果表明：齿腔中齿轮啮合段是齿轮泵的主要振动源，压力信号从啮合段向进出口两侧传递时会逐渐衰减；从进口到出口，沿着圆周方向，各个齿腔的压力幅值是逐渐增加的；主动轮齿腔监测点压力脉动的振幅要明显高于从动轮，进、出口监测点的压力脉动的主频为175 Hz，齿腔内监测点的压力脉动的主频为350 Hz，齿频是影响齿轮泵压力脉动的主要因素。
In order to analyze the characteristic of the unsteady pressure in the internal gear oil pump, based on the standard k-ε turbulence model and the immersed solid model, the three dimensional (3-D) unsteady calculation was carried out about the internal flow field of the gear oil pump by the software CFX of flow field analysis. The monitoring points were set up in the different locations of the internal gear pump, and the results about the pressure pulsation were obtained, and then those data were analyzed in frequency domain. Results show that the meshing segment in gear cavity is the main vibration source, the pressure signal decays gradually passing from the meshing segment to both sides of the inlet and outlet. The pressure amplitude in each gear cavity grows gradually along circumference direction from inlet to outlet. The pressure pulsation amplitude of the monitor in driver gears cavity is much higher than the value in driven gear. The dominant frequency of pressure pulsation is 175 Hz in inlet/outlet monitoring points, and 350 Hz in the diver gears monitor, which is the main factor of influence to the pressure pulsation of gear oil pump.
.[J]. Machine Tool & Hydraulics,2015,43(9):110-113