Kakuda Branch Office, National Aerospace Laboratory(NAL)
Kakuda Branch Office, National Aerospace Laboratory(NAL)
National Space Development Agency of Japan(NASDA)
Kakuda Branch Office, National Aerospace Laboratory(NAL)
出版者
航空宇宙技術研究所
出版者（英）
National Aerospace Laboratory(NAL)
雑誌名
航空宇宙技術研究所報告
雑誌名(英)
Technical Report of National Aerospace Laboratory TR-1155
A carbon segmented circumferential seal with Rayleigh steps, designed as a helium purge seal for the liquid oxygen turbopump of the LE-7 rocket engine, was experimentally studied to improve its durability over a wide range of operating conditions. Five combinations of sealing materials were tested for long durations using helium purged pressures from 0.3 to 0.8 MPa and speeds from 52 to 105m/s. Friction tests of the sealing materials were also performed to enable comparisons with the seal test results. The effects of the operating conditions and the use of carbon materials, hard coating materials on the runner and MoS2 lubricating films were examined to enable the tribological performance of the sealing surfaces. The test seal having a MoS2 lubrication film sprayed on the carbon sealing surface and a runner coated with a Cr2O3 plasma-sprayed film demonstrated sufficient durability over a wide range of operating conditions.
液体酸素ターボポンプ用カーボンセグメントシールの耐久性能
naltr01155.pdf
(1.91MB)
