Device and method for testing high-temperature low-cycle fatigue performance of rotor blade

Abstract

The invention relates to a device and a method for testing high-temperature low-cycle fatigue performance of a rotor blade, and belongs to the field of precise instruments. A tensile loading module is connected with a supporting platform through bolts on an X-direction moving platform, a servo hydraulic cylinder of a bending fatigue loading module is rigidly connected with the supporting platform, a sliding table of a high-temperature environment building module is rigidly connected with an upper supporting frame, and a first auxiliary supporting assembly and a second auxiliary supporting assembly of the supporting and positioning module are rigidly connected with the supporting platform. The first auxiliary supporting assembly is connected with a first middle connecting piece of the tensile loading module, and the second auxiliary supporting assembly is connected with a second middle connecting piece of the bending fatigue loading module. The device has the advantages that 0-10 kN static tensile load loading and 0.001-5 Hz low-frequency bending fatigue loading of the blade are achieved respectively, the high-temperature environment construction module can achieve high-temperature testing environment construction of the blade, and the high-temperature tensile-bending combined load condition borne by the aircraft blade in the actual service process is accurately simulated.

Description

technical field [0001] The invention belongs to the field of precision instrument science, in particular to an instrument and method for testing the high-temperature and low-cycle fatigue performance of aircraft rotor blades. Background technique [0002] Low-cycle fatigue of aircraft blades is the fatigue caused by the unit to the blades in a cycle of starting, running, and stopping. As the most important part of an aeroengine, the working environment of aircraft blades is very harsh. They are subjected to centrifugal loads during work, and are continuously subjected to alternating loads of airflow excitation force and high temperature loads. Therefore, once the blade fatigue damage occurs, it will lead to very serious consequences. The service safety assessment and reliability prediction of aircraft blades has become a key issue in the aviation industry, and the fatigue failure of blades is also a serious threat to national security and the development of the national eco...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a rotor blade high-temperature low-cycle fatigue performance testing device and method to solve the problem existing in the prior art that the actual service conditions of the aircraft blade cannot be completely simulated based on the single load type of the aircraft blade.

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