迷宫密封式液压缸泄漏量建模与分析

摘要

针对液压缸直通式迷宫密封泄漏量分析困难的问题，基于PHOENICS软件对采用k-ε湍流模型的活塞杆导向套中的迷宫密封流场进行了计算，分析了缝隙中液压油为紊流时迷宫密封的凹槽数目、凹槽深度、凹槽宽度及凹槽间距对泄漏量的影响，并利用迷宫中凹槽的摩擦因数曲线验证了结论的正确性。结果表明：凹槽宽度约为间隙的20～30倍，凹槽深度约为间隙的3～5倍，凹槽间距大于间隙的50倍，凹槽深度宽度比为0.2，凹槽间距宽度比大于2.5，为最佳防泄漏条件。%According to the problem that it was difficult to analyze the leakage of straight-through labyrinth seals of hydraulic cyl-inder,k-εturbulent model was used to calculate the leakage of the labyrinth seal in piston rod guide sleeve based on PHOENICS soft-ware.The influences of groove number,groove depth,groove width and groove distance on leakage were analyzed,which correctness was verified by using the groove friction coefficient curve.It is shown that groove width is about 20 ~30 times of clearance,groove depth is about 3~5 times of clearance,groove distance is greater than 50 times of clearance,the groove depth to width ratio is about 0.2 and the groove distance to width ratio is greater than 2.5 have better effect on preventing leakage.