凸舌油槽对摆线转子泵脉动特性的影响

In order to improve the pulsation characteristics of the flow field of the cycloidal rotor pump, a structure model of a tongue-shaped oil groove with an increased limit oil inlet and outlet area is established. Using the numerical simulation method, the internal flow field of the cycloidal rotor pump model with the tongue-shaped oil groove structure is calculated, and the influence of the tongue-shaped oil groove structure on the pressure pulsation at the tooth tip, the tooth root and the maximum meshing volume inside the rotor fluid is analyzed, and the axial pressure non-uniformity of the rotor and the axial flow field characteristics are studied. The results show that: the tongue-shaped oil groove structure can effectively improve the pressure pulsation of the flow field of the cycloidal rotor pump; the pressure pulsation at the tooth root decreases by about 25%, and the pressure pulsation at the maximum meshing volume decreases by about 54.2%, with little impact on the tooth tip; the axial non-uniformity at the tooth root is about 3.5%, about 17.9% at the tooth tip, and about 3.1% at the maximum meshing volume; the smaller the inter-tooth volume, the greater the axial flow resistance, causing the deposition of high-pressure fluid and resulting in axial non-uniformity.

为了改善摆线转子泵流场脉动特性,建立一种具有增加极限进出油面积的凸舌油槽结构模型。采用数值模拟方法,对凸舌油槽结构的摆线转子泵模型内部流场进行计算,分析了凸舌油槽结构对转子流体内部齿顶处、齿根处及最大啮合容积处压力脉动的影响,研究了转子轴向压力不均匀度以及轴向流场特性。结果表明:凸舌油槽结构能够有效改善摆线转子泵流场压力脉动;在齿根处压力脉动下降约25%,最大啮合容积处压力脉动下降约54.2%,对齿顶影响不大;齿根处轴向不均匀度约3.5%,齿顶处约17.9%,最大啮合容积处约3.1%;齿间容积越小,轴向流动阻力越大,使得高压流体沉积,导致轴向存在不均匀度。