| 摘要 |
A cylindrical case body made of a composite material; a linking ring made of Al, which is fitted and fixed to a rear end portion of the case body and has an annular groove which receives a reverse thrust load from a reverse thrust transmission body; and ring constituent bodies made of Ti alloy, each of which is placed in the rear end portion of the case body and has an arcuate groove which undertakes a reverse thrust load larger than that received by the linking ring, are included. The ring constituent bodies are fitted in notches of the linking ring and are brought into contact with, and are fixed to, outward receiving walls of the linking ring, whereby the ring constituent bodies are positioned relative to the case body in the axis direction and in the radial direction respectively, and the annular groove and the arcuate grooves are allowed to continue to each other. The ring constituent bodies made of Ti alloy, which receive a large reverse thrust load, can be placed with high positioning accuracy. Further, it is possible to allow the ring constituent bodies to undertake the reverse thrust load evenly. |
| 主权项 |
1. A fan case that covers fan blades of an aircraft jet engine, the fan case comprising:
a case body in a cylindrical shape, the case body being made of a composite material in which reinforcing fibers are impregnated with a thermosetting resin; a linking ring, the linking ring being made of Al, having an annular groove opened in a centrifugal direction, and being fitted and fixed to an outer peripheral side of a peripheral wall in a rear end portion of the case body, the rear end portion being located on a rear side of the aircraft jet engine, the annular groove being linked to a reverse thrust transmission body and receiving a reverse thrust load; and a ring constituent body, the ring constituent body being made of Ti alloy, having an arcuate groove opened in the centrifugal direction, and being placed on the peripheral wall in the rear end portion of the case body, the arcuate groove being linked to the reverse thrust transmission body and undertaking a reverse thrust load larger than the reverse thrust load received by the linking ring, wherein the ring constituent body is fitted in a notch, the notch being formed in the linking ring and being opened toward rear of the aircraft jet engine, so that the linking ring and the ring constituent body are integrated with each other, the ring constituent body is positioned relative to the case body in an axial direction and in a radial direction respectively by bringing the ring constituent body, placed on the peripheral wall of the case body, into contact with, and fixing the ring constituent body to, an outward receiving wall formed on the linking ring and protruding in the centrifugal direction, and the annular groove of the linking ring and the arcuate groove of the ring constituent body continue to each other. |
