| 摘要 |
1,122,684. Centrifugal separators. GENERAL ELECTRIC CO. 25 March, 1966 [29 March, 1965], No. 13308/66. Heading B2P. [Also in Division F1] Entrained particles such as sand, dust and droplets of water are removed from the airstream entering the compressor (13) of a gas turbine engine (11), Fig. 1 (not shown), by a separator 12 comprising vanes 25 which impart a swirl to the airstream and cause the particles to be directed through an annular slot 29 into a collecting chamber 36. The particles are drawn off to atmosphere through pipe 37 by an engine driven pump (38). Vanes 26 upstream of the compressor inlet guide vanes (18) remove the swirl imparted by vanes 25. Both sets of vanes 25, 26 are mounted on an inner fairing 21. Figures 3 to 5 (not shown) illustrate modified profiles e.g. parabolic, of the wall portions corresponding to the diverging portion 27. In a further modification, Fig. 6 (not shown), the diverging wall portion (55) is formed of well damped rubber to control the bounce of the entrained particles. In the modifications of Figs. 3 to 6 no means are provided for drawing off the particles from the collecting chamber (50), but baffles may be provided within the chamber to reduce turbulence. In a further modification, Fig. 7 (not shown), the swirl imparting and removing vanes (61, 62 respectively) are angularly adjustable to vary the swirl under different operating conditions. The separator 12 may be an 'integral assembly with the engine (11), in which case the compressor inlet guide vanes (18) are omitted and the swirl removing vanes 26 direct the airstream on to the compressor rotor blades. |
