ABRASIVELY WEARABLE DEVICE ARRANGED ON FAN HOUSING OF GAS-TURBINE ENGINE Russian patent published in 2006 - IPC F01D25/24 

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: invention relates to gas-turbine engine with axle of rotation B containing fan housing and fan proper with movable blades. Clearance is provided between inner surface of housing and free ends of fan blades. Fan bearing is connected with fixed parts of gas-turbine engine by means of tie rods which break in case of definite load on fan blades, and axle of rotation of fan vibrates around axle of rotation B of gas-turbine engine. Fan housing has layer of thermally formed foal placed opposite to free ends of fan blades, glued to inner surface of housing and covering at least part of clearance mentioned above. Layer of thermally formed foam is partially covered with layer of abrasively wearable material. Thickness of layer of said material is chosen to prevent contact of free ends of fan blades at normal functioning of gas-turbine engine with foam layer and in case of excess load of fan, free ends of fan blades, fragmentate, at least partially, said layer of abrasively wearable material.

EFFECT: prevention of damage of fan housing in case of abnormal functioning of engine.