PERFECCIONAMIENTOS EN LOS GENERADORES PARA MISILES

摘要

An air turbine generator 10 for a missile which is driven in motion by ram air hitting a turbine impeller 19 is made to a simple and inexpensive design by moulding a stator coil 14 and iron yoke 13 in a body 12 of thermoplastic or thermosetting resin formed with an axial passage 15 which has widened portions 16 and 33. The widened portion 16 contains a race of needle roller bearings to provide a journal bearing for a shaft 18 extending along the passage. The shaft carries the turbine impeller 19 and a permanent magnet rotor 22 having a plurality of poles to align with pole pieces of the iron yoke. A thrust bearing for the shaft consists of a ball 31 bearing against the end of the shaft and held to a thrust plate 28 biased by a compression washer 32. The ball makes point contact with the shaft to reduce friction and resilience of the washer relieves axial forces on the impeller while taking up little axial space.