Turbine blade fatigue test clamp and device

Abstract

The invention provides a turbine blade fatigue test clamp and a turbine blade fatigue test device comprising the clamp, the clamp comprises an upper clamp and a lower clamp, the lower end face of the upper clamp and the upper end face of the lower clamp are inclined structures matched with each other, one side face of the upper clamp is provided with a mortise, and the lower end face of the upper clamp is provided with a groove. The inclined structure inclines downwards in the direction from outside to inside along the mortise. The device comprises the clamp, a mounting seat and a vibration table, the bottom of the mounting seat is fixedly arranged on the vibration table, a groove matched with the clamp is formed in the side face of the mounting seat, and the clamp is fixedly arranged in the groove. According to the invention, the clamping mode of the turbine blade is changed, so that the turbine blade is tightly clamped and does not slightly move after long-time vibration, the energy transmission rate of the vibration table is improved, and the test efficiency is improved; the clamp is simple in structure, easy to manufacture and popularize and low in cost; the device and the clamp are simple in structure, easy to install and convenient to use and operate.

Description

technical field [0001] The invention belongs to the technical field of turbine blades, in particular to a fixture and device for a turbine blade fatigue test. Background technique [0002] The turbine blades of modern aero-engines work in high temperature and high pressure environments, and are subjected to the alternating effects of thermal stress, inertial force, aerodynamic force and other forces. The working environment is harsh and the working load is complex, so the turbine blades must meet a certain strength. It can work normally within the safe life cycle. Therefore, it is necessary to test the high temperature fatigue characteristics of turbine blades by means of experiments. [0003] Aeroengine turbine blade fatigue test can obtain the S-N curve of the blade or the fatigue life under the specified load, and the working environment of the blade should be simulated as much as possible to make the test results closer to the real situation. Commonly used test devices...

AI Technical Summary

Problems solved by technology

However, the existing device has insufficient pressing force, and there is a slight movement between the tenon of the blade and the tenon and groove of the fixture after long-term vibration, which affects the progress of the test.

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