中文摘要：

间隙密封旋转接头在高速旋转过程中，密封间隙大小容易受到外界干扰而变化，从而引起接头体和芯轴的磨损以及泄漏量加剧。通过采用CFD技术对内部环形间隙进行仿真，分析了均压槽分布在芯轴表面和接头体内壁面两种不同形式以及芯轴转速对泄漏量的影响，得出了间隙流场内流体压力、速度分布和泄油口的流量。结果显示：间隙流场的压力呈线性分布；均压槽两种不同分布形式对旋转接头的泄漏量无影响，均压槽分布在芯轴表面具有更好的抗磨损作用：旋转接头的泄漏量随着转速的提高而减小。

英文摘要：

During the high speed rotation of clearance seals rotary joint, the sealing clearance varies vulnerable to outside interference, which will cause the wear between joint body and the mandrel or increase the leakage. Studying the inner flow field of the clearance seals rotary joint by CFD technology,the effects of the amount of leakage was analyzed on different forms of pressure-equalizing grooves distribution and different spindle speed. The distribution of flow field pressure and velocity field was obtained, and the amount of leakage was calculated.The results show： the different forms of pressure-equalizing grooves distribution had no effect on the leakage of the rotary joint,pressure-equalizing grooves distribution had a better wear resistant in the surface of the mandrel; the leakage of rotary joint was decreased with increasing of the rotational speed.