TURBOMACHINE DISC LOCKING ASSEMBLY STRENGTH TEST METHOD Russian patent published in 2020 - IPC G01N3/08 G01M13/00 

FIELD: turbines or turbomachines.

SUBSTANCE: invention relates to turbomachine building. Method consists in that loading rigging is installed in grips of testing machine, which forms tensile force, fixing in the loading tool the imitation model of the interlocking connection of the disc of the turbomachine, which is a disc rim simulator with a imitator of the blade shank installed in the slot of the disc rim simulator, wherein in each of them there is at least one hole for application of tensile forces in the vertical direction, and in the disk rim simulator also holes for application of tensile loads in vertical and horizontal direction, distributing the load from the testing machine to the fasteners of the disc rim simulator and the imitator of the blade shank, creating contact stresses in the vertical and horizontal directions on the contact surfaces of the disc rim simulator and the imitator of the blade shank, setting the sequence of repeated cyclic tensile loads of the calculated value, the ratio of which is equal to the centrifugal force of the blade and the disc rim, observing places of possible crack occurrence within limits of disc rim simulator, recording number of loading cycles of disc rim simulator till destruction.

EFFECT: disclosed method of tests for strength of interlocking connections of disks of turbomachines allows to investigate a wide set of loading conditions of GTE disks, and also to estimate efficiency of those or other constructive actions by criteria of durability and cyclic crack resistance at complex stress condition.

1 cl, 5 dwg