冲击工况下蜂窝密封封严特性研究  

Study on Sealing Characteristics of Honeycomb Seal under Impact Condition

作　　者：祝圣泉 赵晶[1] ZHU Shengquan;ZHAO Jing(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110000,China)

机构地区：[1]沈阳工业大学机械工程学院,沈阳110000

出　　处：《机械工程师》2024年第7期52-54,58,共4页Mechanical Engineer

摘　　要：大旋转机械系统中经常出现转子与定子的碰摩,已经成为工件损耗的主要因素之一。轻者引起机械故障,重者导致机毁人亡,造成重大经济损失。文中主要运用流固耦合的方法研究在冲击工况下蜂窝密封的泄漏量变化情况,研究发现:在转子与蜂窝密封碰撞瞬间,由于突然冲击破坏气流耗散平衡,泄漏量陡然增大,在腔内气流稳定后泄漏量又逐步减小,最后趋于稳定,当连续冲击时,相邻两次冲击后泄漏量增量大于前两次冲击泄漏量增量。The collision friction of the rotor and stator of the large rotating mechanical system often occurs,has become one of the main factors of workpiece loss.This paper mainly uses the fluid-solid coupling method to study the change of leakage of honeycomb seal under the impact condition,and it is found that at the moment of collision between the rotor and the honeycomb seal,the leakage increases steeply due to the sudden impact that destroys the balance of airflow dissipation.After the airflow in the cavity is stabilized,the leakage decreases gradually and finally stabilizes.When the impacts are continuous,the leakage increment after two adjacent impacts is larger than the leakage increment after the first two impacts.

关 键 词：蜂窝密封 泄漏量 冲击工况 流固耦合 腔内涡旋 

分 类 号：TH122[机械工程—机械设计及理论]