高温气冷堆主氦风机主轴的迷宫密封泄漏特性  

Leakage Characteristics of Labyrinth Seal of the Main Helium Fan Used for High Temperature Gas Cooled Reactor

作　　者：丁军 索双富[3] 张妙恬 DING Jun;SUO Shuangfu;ZHANG Miaotian(School of Mechanical and Electrical Engineering,North China Institute of Science and Technology,Langfang Hebei 065201,China;School of Mechanical Electronic&Information Engineering,China University of Mining and Technology Beijing,Beijing 100083,China;School of Mechanical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]华北科技学院机电工程学院,河北廊坊065201 [2]中国矿业大学(北京)机电与信息工程学院,北京100083 [3]清华大学机械工程学院,北京100084

出　　处：《润滑与密封》2022年第7期49-53,共5页Lubrication Engineering

基　　金：国家重点研发计划(2017YYF0108101);中央高校基本科研业务费资助项目(3142015037)。

摘　　要：高温气冷堆作为先进的第四代核电堆型技术,主氦风机是其中非常关键设备。以高温气冷堆主氦风机主轴的迷宫密封为研究对象,通过CFD数值技术分析迷宫密封在不同出入口压差、轴转速、空腔宽度和齿宽下的泄漏特性,同时建立密封试验平台,通过试验研究轴的转速、出入口压差对泄漏特性的影响。结果表明,随着出入口压差的增大,泄漏量增加明显,近似成正比关系;随着转速的增加,泄漏量有所降低,但变化幅度很小,在转速达到5000r/min时,泄漏量最小;随着空腔宽度的增加,泄漏量减小;随着齿宽的增大,泄漏量减小。As the advanced fourth generation nuclear power reactor technology,the main helium fan of the high-temperature gas-cooled reactor is the key equipment.The object of this study is the labyrinth seal between the main helium fan stages of high-temperature gas-cooled reactor.The leakage characteristics of the labyrinth seal under different inlet and outlet pressure difference,shaft speed,cavity width and tooth width were analyzed by CFD numerical technology.At the same time,a sealing test platform is established to study the influence of shaft speed and inlet pressure difference on leakage characteristics.The results show that the leakage increases obviously and is approximately proportional with the increase of the pressure difference between inlet and outlet.With the increase of rotational speed,the leakage decrease,but the change range is small,when the rotational speed reaches 5000 r/min,the leakage amount is the smallest.As the increase of the cavity width,the leakage decrease.As the increase of the tooth width,the leakage decrease.

关 键 词：迷宫密封 高温气冷堆 泄漏量 密封性能 

分 类 号：TH136[机械工程—机械制造及自动化]