FAN HOUSING AND METHOD OF MANUFACTURING THE FAN CASE Russian patent published in 2018 - IPC F04D29/52 F01D25/24 F04D29/60 

FIELD: ventilation.

SUBSTANCE: fan housing comprises cylindrical case body 10 made of a composite material; linking ring 20 made of Al, which is fitted and fixed to a rear end portion of case body 10 and has annular groove 21 which receives a reverse thrust load from reverse thrust transmission body 8; and ring constituent bodies 30 made of Ti alloy, each of which is placed in the rear end portion of case body 10 and has arcuate groove 31 which undertakes a reverse thrust load larger than that received by linking ring 20, are included. Ring constituent bodies 30 are fitted in notches 22 of linking ring 20 and are brought into contact with, and are fixed to, outward receiving walls 23 of linking ring 20, whereby ring constituent bodies 30 are positioned relative to case body 10 in the axis CL direction and in the radial direction respectively, and annular groove 21 and arcuate grooves 31 are allowed to continue to each other. Ring constituent bodies made of Ti alloy, which receive a large reverse thrust load, can be placed with high positioning accuracy.

EFFECT: it is possible to allow the ring constituent bodies to undertake the reverse thrust load evenly.

2 cl, 6 dwg