| 摘要 |
927,496. Axial-flow compressors. ROLLSROYCE Ltd. Jan. 30, 1962, No. 3543/62. Class 110 (1). In a multi-stage axial-flow compressor for a gas-turbine engine, the first-stage rotor blades 25 are formed of metal (such as steel or a magnesium alloy, but preferably an aluminium alloy) adapted to withstand the bending stresses and erosive action to which the blades 25 are subjected, the rotor blades 28 of the remaining stage being formed of a synthetic resin. The synthetic resin is preferably an epoxy or a phenolic resin, reinforced with fibres of glass or asbestos. The rotor drum 23 and the rotor disc of each stage are of the metal while the casing 17, stator blades 30, inlet guide vanes 20, nose cone 16 and struts 18 are of the synthetic resin. The rotor blades 25 and, it may be, the rotor blades 28, are pivotally connected to their rotor disc by pins 26 which are selected (e.g. by varying their size or composition) so as to ensure balancing of the rotor. The compressor forms part of a vertical-lift gas-turbine engine comprising combustion equipment 12, a turbine 13 and a short jet pipe 14. |
