内啮合摆线泵静压支承槽的设计

Design of Hydrostatic Bearing Groove for Internal Gerotor Pump

为了平衡一齿差内啮合摆线泵(称摆线泵)工作时外转子所受到的不平衡径向液压力设计出了一种静压支承槽结构。为了确定静压支承槽的范围,建立了理想化的数学模型,得到外转子在x,y方向所受液压力分力,求其合力然后计算得到静压支承槽的范围。接着确定支承槽深度,将油液流入静压支承槽看作一种泄漏方式,通过建立泄漏与槽厚的数学模型来控制泄漏量得到支承槽地的合理深度,据此建立摆线泵静压支承结构模型,抽取流道导入pumplinx中进行仿真。对比支承结构与原始模型排油区压力云图,容积效率。得到结论:静压支承槽虽不能完全抵消外转子所受的不平衡径向液压力,但能在几乎不影响容积效率的前提下有效减轻它,使得外转子与壳体间的磨损减小。

In order to balance the radial hydraulic pressure of the outer rotor when the inner meshing cycloid rotor pump(hereinafter referred to as the rotor pump)works,a static pressure support groove structure is sent.In order to determine the range of the hydrostatic support groove,an idealized mathematical model was established to obtain the hydraulic pressure component of the rotating outer rotor in the x and y directions,and the resultant force was calculated to obtain the range of the hydrostatic support groove.In order to determine the depth of the support groove,the oil flowing into the hydrostatic support groove is regarded as a leakage method,and a reasonable depth of the support groove is obtained by establishing a mathematical model of leakage and groove thickness to control the leakage.Finally,the static pressure supporting structure model of the rotor pump is established,and the extraction flow channel is imported into pumplinx for simulation.Compare the pressure cloud diagram between the teeth of the supporting structure and the original model,and the volumetric efficiency.The conclusion is drawn:Although the hydrostatic support groove cannot completely offset the unbalanced radial force experienced by the outer rotor,it can effectively reduce the contact stress between the outer rotor and the housing,relieve friction to a large extent,and can hardly affect Under the premise of volumetric efficiency,the unbalanced radial hydraulic pressure on the outer rotor is effectively reduced.