TURBINE ENGINE AXIAL COMPRESSOR WORKING WHEEL Russian patent published in 2017 - IPC F04D29/38 F01D5/14 

FIELD: engine devices and pumps.

SUBSTANCE: invention can be used in the working wheels of the axial compressors of gas turbine engines (GTE). In the known working wheel of the axial compressor of the gas turbine engine comprising rotor blades mounted on the rotor disc, each of which contains a shank and a feather bounded by convex and concave surfaces with bandage shelves made thereon in the middle part along the height of the blade feather, the band shelves of adjacent blades are interconnected to form at least one antivibration bandage ring of asymmetrical profile, which convex side is located on the disc side along the air current lines in the inter-blade channel. According to the invention, the ring is provided with compensation ribs of symmetrical aerodynamic profile, made on at least one of bandage shelves of each blade and located along air current lines of in the inter-blade channel, at that the size of the ribs in the radial direction is equal to the sum of 0.1 of the blade length and the gap value between the end of the blade and the fixed body. The profile of the shelves forming the antivibration bandage ring is made in the form of a wing profile, two or more bandage shelves can be made on convex and concave surfaces of each blade, and the bandage shelves are made in the middle part of the blade at a distance from the blade edge equal to 0.2…0.7 of its length. Implementation of the invention enables to reduce the level of mechanical stresses in feathers of working blades, locks and discs of the gas-turbine engine rotor due to partial compensation of centrifugal forces by aerodynamic force appearing on antivibration shelves of the working blades when they flown with air (gas).

EFFECT: reduced mechanical stress results in reduction of weight, size and cost of the units, increased operational reliability due to improved operating conditions of antivibration bandage shelves of working blades of the axial compressor.

4 cl, 3 dwg