Ultrasonic amplitude-change pole assembly, and ultrasonic fatigue loading test device and method

Abstract

The invention discloses an ultrasonic amplitude-change pole assembly. A rod body of the ultrasonic amplitude-change pole assembly comprises a first ultrasonic amplitude-change pole and a second ultrasonic amplitude-change pole, one of the first ultrasonic amplitude-change pole and the second ultrasonic amplitude-change pole is provided with a sealing flange, and the other one of the first ultrasonic amplitude-change pole and the second ultrasonic amplitude-change pole is connected with a sample; and the sealing flange is positioned at a vibration node of the first ultrasonic amplitude-change pole or the second ultrasonic amplitude-change pole. The rod body is sleeved with the sleeve, and an annular cavity gap with the two ends blocked is formed between the sleeve and the rod body. The cooling flow channel comprises an inner flow channel formed in the rod body, and the inner flow channel communicates with the annular cavity gap. The sealing flange is arranged on the rod body, so that the rod body can be effectively integrated with a complex atmosphere cavity or a high-temperature atmosphere cavity; a cooling medium sequentially flows through the inner flow channel and the annular cavity gap and can cool the rod body of the ultrasonic amplitude transformer assembly from inside to outside, so that the refrigeration efficiency is greatly improved. The invention further provides an ultrasonic fatigue loading test device with the ultrasonic amplitude transformer assembly and an ultrasonic fatigue loading test method based on the ultrasonic fatigue loading test device.

Description

technical field [0001] The invention relates to the field of high-cycle and ultra-high-cycle fatigue performance and durability testing of materials, in particular to an ultrasonic horn assembly, an ultrasonic fatigue loading test device and a test method that can be used in high temperature and complex atmosphere environments. Background technique [0002] Aeroengines and ground gas turbines are known as the "crown" of modern industry because of their complex processing and assembly techniques, and they are one of the important symbols of a country's comprehensive strength. The gas inlet temperature of the advanced aero-engine can reach 1380°C, and the thrust can reach 226kN. As the part with the worst service environment, the turbine blade is subjected to huge centrifugal force and aerodynamic force, the blade part bears a tensile stress of about 140MPa, and the blade root part bears an average stress of about 280-560MPa. The leaf body part and the leaf root part bear the...

AI Technical Summary

Problems solved by technology

[0004] Due to the simple structure of conventional ultrasonic fatigue components, it is difficult to place them in a high temperature environment as a whole

Existing ultrasonic fatigue testing instruments in high temperature environments use induction heating coils to inductively heat a small part of the sample, resulting in a large temperature gradient in the sample, and the test results are not accurate

Existing ultrasonic fatigue components are difficult to integrate with complex atmosphere chambers, so it is difficult to conduct ultrasonic fatigue tests in complex atmosphere environments

Further, the existing ultrasonic fatigue components can not realize the ultrasonic fatigue test under high temperature-complicated atmosphere environment

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