An experimental verification device for crack growth life of a wheel disc

Abstract

An experimental verification device for crack extension life of a wheel disc, which belongs to the technical field of experimental verification of crack extension of wheel discs. The present invention solves the problem that the traditional double-tie rod experimental device cannot ensure that the force and the angle between the two tie rods remain unchanged during the loading process. , the problem that only a single tenon and groove stress verification test can be carried out. The wheel plate sub-model is fixedly installed on the workbench of the MTS testing machine through the wheel plate clamp. The three tenons on the upper end of the wheel plate sub-model are equipped with toothed loading blocks, and the upper ends of the toothed loading blocks are hinged with U-shaped shackles. The fixed frame is symmetrically installed on the columns on both sides of the MTS testing machine through the flange. The second fixed pulley is arranged at the center of the free end of the fixed frame, and the first fixed pulley is arranged above and below the second fixed pulley. The upper end of the wire rope fixed seat is connected to the Output connection of the MTS testing machine. The experimental verification device for crack extension life of the wheel disc of the present invention avoids errors caused by force on the tongue and groove; the starting ends of the three steel wire ropes are stretched synchronously to ensure that the force on each steel wire rope is equal.

Description

technical field [0001] The invention relates to a verification device, in particular to an experimental verification device for crack extension life of a roulette, and belongs to the technical field of experimental verification of crack extension of a roulette. Background technique [0002] One of the important criteria for the design of gas turbine discs is to have sufficient crack growth life. Although the fracture mechanical properties of materials and theoretical calculation of life are important steps in life prediction, the structural factors, cold and hot processing conditions, surface conditions and other factors of the wheel are not fully considered. Therefore, it is necessary to carry out tests on the crack growth life of the disc to verify the accuracy of the crack growth life prediction. [0003] The experimental verification device of the existing wheel sub-model is a double tie rod structure, and the tie rods are required to have a sufficiently long size. The ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an experimental verification device for the crack extension life of the wheel disc, so as to solve the problem that the traditional double tie rod experimental device cannot guarantee the same force on the two tie rods during the loading process, and can only carry out a single tenon groove stress verification test question

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