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。
Abstract
In order to improve flow field fluctuation characteristics of a cycloid rotor pump, the pump model having a tongue oil groove structure with a capacity of increasing limit oil inlet and outlet areas was established.Using the numerical simulation method, the internal flow field in the pump model with tongue oil groove structure was calculated.The effects of tongue oil groove on pressure fluctuations at the rotor’s tooth top, tooth root and the maximum meshing volume were analyzed and the rotor’s axial pressure unevenness and axial flow field characteristics were studied.The results showed that the tongue oil groove structure can effectively improve the flow field’s pressure fluctuation of the cycloid rotor pump; the pressure fluctuation at the rotor tooth root drops by about 25%, the pressure fluctuation at the maximum meshing volume drops by about 54.2%; the structure has little effect on the pressure fluctuation at the rotor tooth top; the axial unevenness at the tooth root is about 3.5%, that at the tooth top is about 17.9%, that at the maximum meshing volume is about 3.1%; the smaller the volume between teeth, the larger the axial flow resistance to cause the deposition of high pressure fluid and axial unevenness.
关键词
摆线转子泵 /
凸舌油槽 /
压力脉动 /
轴向不均匀度 /
流场
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Key words
cycloid rotor pump /
tongue oil groove /
pressure fluctuation /
axial unevenness /
flow field
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