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无扩口导管拧紧力矩对其密封性能的影响
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“中国制造 2025” 四川行动资金项目(40207000120X)


Influence of Tightening Torque on Sealing Property of Non-flared Tube
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    摘要:

    以某型飞机中无扩口液压导管为研究对象,结合飞机液压导管实际安装以及保压工况,利用有限元软件ANSYS中多线性随动强化来模拟导管弹塑性本构模型;对处于不同安装力矩以及恒定压力下的导管连接件进行仿真分析,研究安装力矩对导管管接头处的应力应变以及密封性能的影响,并给出参考安装力矩。构建液压导管安装试验台,利用力矩扳手采集拧紧力矩值并使用液压油车对导管进行加压试验,验证不同安装力矩对导管管接头密封性能的影响。结果表明:导管与卡套之间的胀形区域产生的大变形以及应力集中是引起导管管接头渗漏的主要原因之一;所提出的密封性能仿真方法可以较为准确地模拟拧紧力矩与密封性能的关系,为实际工程中导管安装提供依据

    Abstract:

    The non-flared hydraulic conduit of a certain type of aircraft was taken as the research object.Combined with the actual installation and pressure-holding conditions of the aircraft hydraulic conduit,the multilinear follow-up reinforcement was used to simulate the elastoplastic constitutive model of the duct,ANSYS was used to simulate and analyze the conduit joints under different installation torques and constant pressures.The effects of installation torque on the stress and strain at the joint of the conduit and the sealing performance were studied,and the reference installation torque was obtained.The hydraulic conduit installation test bench was constructed,the value of the tightening torque was collected by using a torque wrench,and the pressure test of the catheter was carried out by the hydraulic pump.The test results verified the effects of different mounting torques on the sealing performance of the conduit fittings.The test results show that the large deformation and stress concentration caused by the bulging region between the catheter and the ferrule is one of the main causes of leakage of the conduit fitting.The sealing performance simulation method can accurately simulate the relationship between tightening torque and sealing performance,which provides a basis for catheter installation in practical engineering

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郑世伟,丁晓,梁红琴,彭炳康,祝孟豪,张永建.无扩口导管拧紧力矩对其密封性能的影响[J].润滑与密封,2020,45(5):30-35.
. Influence of Tightening Torque on Sealing Property of Non-flared Tube[J]. Lubrication Engineering,2020,45(5):30-35.

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  • 在线发布日期: 2020-12-15
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