Testing device and method for performing fatigue test on spacer part

Abstract

The invention discloses a testing device for performing a fatigue test on a spacer part. The testing device comprises a lower fixing base and a pressing piece which are used for fixing the spacer part, and a vibration pressing head for applying pressure to the flange fillet part of the spacer part, wherein the lower fixing base is mounted on a fatigue tester base body in a threaded connection manner, the spacer part is placed between the lower fixing base and the pressing piece, the fixing base, the spacer part and the pressing piece are connected through a locking bolt, the vibration pressing head is mounted on the vibration beam of the fatigue tester in a threaded connection manner, and the vibration pressing head contacts with the spacer part in a matched manner. A method using the testing device to perform the fatigue test on the spacer part includes: determining the material of the spacer part, using ANSYS software to analyze the load, deformation displacement and stress of the spacer part in a vibration structure, comparing the measured yield strength and tensile strength of the spacer part with a simulation analysis result to determine the load force of an actual vibration fatigue test, and carrying out the vibration fatigue test of the spacer part. The testing device is short in testing cycle, low in testing cost and accurate and scientific in testing result and can be used for evaluating the fatigue service life of the spacer part and guiding spacer part design.

Description

technical field [0001] The invention belongs to the technical field of component performance detection, and relates to a spacer component fatigue test test device and a test method. Background technique [0002] Helicopter spherical thrust elastic bearings (elastic bearings) are the core components of star-shaped flexible hubs and spherical flexible hubs, which can realize the waving, swinging and pitch-changing motion of the blades while bearing the huge centrifugal force generated by the rotation of the blades. The elastic bearing is composed of a large joint, a small joint and a plurality of spacer parts and rubber laminations. The spacer part and the rubber are bonded to form an elastic body, and the large joints, small joints and elastic body laminations are bonded to form a whole. The elastomeric laminate composed of spacer parts and rubber is a key part of the elastic bearing. In the work of the elastic bearing, it bears axial compression force, radial side pressure...

AI Technical Summary

Problems solved by technology

At present, there is no fatigue test method for spacer parts alone. In order to assess whether the fatigue performance of spacer parts meets the requirements for use, the assembled elastic bearing is often used to carry out the overall component fatigue test. Although the overall component fatigue test method is relatively accurate and Reliable, but the test cycle is long and the cost is high

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