High-frequency vibration fatigue test device for thin-wall blade parts

Abstract

The invention discloses a high-frequency vibration fatigue test device for thin-wall blade parts. The high-frequency vibration fatigue test device comprises a signal processing and control device, an ultrasonic vibration device, a special blade clamp device and the like. Wherein the ultrasonic vibration device mainly comprises a vibration table, springs, a base and an ultrasonic vibration mechanism, the ultrasonic vibration mechanism is composed of a flange plate, an ultrasonic transducer and an ultrasonic amplitude-change pole, and in the ultrasonic vibration device, a plurality of springs are designed to assist in supporting the vibration table, so that the stress of the ultrasonic vibration mechanism is reduced; and then the ultrasonic generator provides ultrasonic frequency electric energy for the ultrasonic vibration mechanism, so that the ultrasonic vibration mechanism applies high-frequency vibration in two directions to the vibration table, and high-frequency vibration of the ultrasonic vibration device is realized. The pressure sensor is arranged in the special clamp device for the blade, so that the clamping force of the tenon part of the blade is monitored in real time, the clamping force of the blade in a vibration fatigue test is always in a stable area, the stress state of the tenon root is monitored in real time, and the clamping stability of vibration fatigue of the blade is improved.

Description

technical field [0001] The patent of the present invention relates to a high-frequency vibration fatigue test device for thin-walled blade parts, which belongs to the technical field of vibration fatigue test. Background technique [0002] Thin-walled blade parts are one of the key and important parts in aero-engines. Such parts are usually in high temperature, high pressure and high-speed working environments, and are the main failure-prone parts of aero-engines. During the working process, the aero-engine blades are subjected to complex airflow impact, which causes the blades to vibrate. When the vibration impact force exceeds the fatigue limit of the blade, fatigue cracks will appear in the blade, which will gradually develop into fatigue fractures, resulting in failure of the engine during operation, and may even cause serious accidents. Therefore, in the development stage of aero-engine blades, it is necessary to conduct vibration fatigue tests on blades to determine t...

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Problems solved by technology

[0004] Although the ultrasonic machining vibration test device proposed in this document can perform vibration fatigue tests on thin-walled blade parts, it cannot monitor the clamping force in real time in the fixture part, and cannot guarantee the stability and reliability of the vibration test. The horizontal movement of the vibration table translation mechanism cannot be multi-directional and high-frequency vibration, and it is difficult to reflect the actual working environment of the blade, etc.

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