Effect of Atomic Oxygen on Leakage Rate of ORing
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摘要: 使用原子氧效应地面模拟设备对硅橡胶材料O型圈进行了原子氧暴露实验;用测压法进行了O型圈在原子氧暴露前后的泄漏率比对实验,并对实验前后O型圈表面形貌特征作了扫描电镜分析.实验表明:原子氧对O型圈表面有很大的剥蚀效应;O型圈经过原子氧暴露后,质量减少、泄漏率明显增大;暴露时间越长,表面形貌受到的损坏越严重、质量减少量越多,泄漏率也就越大.Abstract: Experiments were conducted with an IFM ground equipment to investigate the effect of atomic oxygen on silicone rubber O-rings. By measuring the pressure between two O-rings, leakage rates between the two O-rings before and after exposure to atomic oxygen were compared. In addition, the surface characteristics of O-ring were analyzed by scanning electron microscope. All experiments provethat atomic oxygen erodes the surface of O-ring seriously, resulting in a weight loss and a weakened sealing capacity of the O-ring. The results show that the surface damage, the weight loss and the leakage rate of an O-ring all increase in proportion to its of the time exposed to atomic oxygen.
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Key words:
- silicone rubber /
- oxygen atoms /
- leakage /
- O-ring
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[1] Provinelli V P,Mckibbin A H. Development of mainshaft seal for advanced air breathing propulsion systems. NASA CR-72987,1971 [2] Wilcock D F, Bjerkile J,Cheng H S. Design of floated shoe close clearance seals for supersonic jet engine compressors[J]. Transactions of the ASME, Journal of Lubrication Technology, 1968, 90:500~509 [3] Leger L J. Low earth orbit atomic oxygen effects on surfaces. AIAA 84-0548,1984 [4] Daniel R Coulter, Ranty H Liang. O-Atoms degradation mechanism of materials. N87-26178,1987. 39~46 [5] 沈志刚,赵小虎,王忠涛,等. 灯丝放电磁场约束型原子氧效应地面模拟设备[J].航空学报,2000,21(5):425~430 Shen Zhigang,Zhao Xiaohu,Wang Zhongtao,et al.Ground-based atomic oxygen effects simulation facility with the filament discharge and bound of magnetic field. Acta Aeronautica Et Astronautica Sinica,2000,21(5):425~430(in Chinese) -
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