High-temperature high-cycle fatigue test thermal isolation device

Abstract

The invention belongs to the field of high-cycle fatigue test technologies, and relates to a high-temperature high-cycle fatigue test thermal isolation device. The device is characterized by comprising a shell 9 and a cover plate 8 which are welded together. The invention provides a high-temperature high-cycle fatigue test thermal isolation device, which avoids reduction of the system rigidity and the test piece excitation efficiency, improves the long-term effect of thermal barrier, meets the requirement of a vibration table for temperature isolation, and prevents damage to the vibration table.

Description

Technical field [0001] The invention belongs to high-cycle fatigue test technology, and relates to a thermal isolation device for high-temperature high-cycle fatigue test. Background technique [0002] Due to the increasing influence of temperature on the high-cycle fatigue characteristics of the blade, the fatigue limit of the blade obtained by the normal temperature vibration fatigue test is very different from the fatigue limit at the actual working temperature. The high-cycle fatigue test of turbine blades under high temperature conditions is particularly important. The high-cycle fatigue test is a long-term test. Long-term work above 1000 ℃ must solve the problem of overheating of the blade clamping tool and the heat protection of the vibration table for high-cycle fatigue test. , To avoid damage to the vibration table due to insufficient thermal isolation. At present, asbestos mats are usually used as the insulation layer between the vibrating table and the test piece clam...

AI Technical Summary

Problems solved by technology

At present, asbestos pads are usually used as a heat insulation layer between the vibrating table and the clamping tooling of the test piece when performing high-temperature and high-cycle fatigue in China. Although it can also ensure the progress of the test, it has the following defects: First, it will reduce the rigidity of the system , resulting in a great drop in the excitation efficiency of the vibration table to the test piece, and the required vibration stress cannot be achieved.

Second, the long-term effect on thermal insulation is poor, and the isolation temperature cannot meet the requirements of the vibration table, which may easily cause damage to the vibration table

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