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A thermal isolation device for high temperature and high cycle fatigue test

A high-cycle fatigue and testing technology, used in measuring devices, vibration testing, and testing of machine/structural components, etc., can solve problems such as reducing system rigidity, shaking table damage, failing to achieve vibration stress, etc., to meet temperature isolation requirements. requirements, improve long-term effects, avoid the effects of excitation efficiency

Active Publication Date: 2018-01-16
AECC SICHUAN GAS TURBINE RES INST
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  • Abstract
  • Description
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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

Method used

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  • A thermal isolation device for high temperature and high cycle fatigue test
  • A thermal isolation device for high temperature and high cycle fatigue test

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Embodiment Construction

[0008] The present invention will be described in detail below. A heat isolation device for high temperature and high cycle fatigue tests, characterized in that it is composed of a shell 9 and a cover plate 8 welded; There are three arc-shaped cooling water passages on the upper surface of the housing 9, which are respectively from the outside to the inside: the outer runner 3, the middle runner 4 and the inner runner 2, and the inner runner 2 There is a circular central boss 1 in the center of the shell 9, a water inlet 5 and a water outlet 6 are arranged on the outer cylindrical surface of the housing 9, the water inlet 5 communicates with the water inlet end of the outer flow channel 3, and the water outlet of the outer flow channel 3 The end is connected with the water inlet end of the middle flow channel 4, the water outlet end of the middle flow channel 4 is connected with the water inlet end of the inner flow channel 2, the water outlet end of the inner flow channel 2 i...

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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 heat 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 through the normal temperature vibration fatigue test is very different from the fatigue limit at the actual working temperature. It is particularly important to carry out the high cycle fatigue test of turbine blades under high temperature conditions. The high cycle fatigue test is a long-term test. When working for a long time above 1000°C, it is necessary to solve the problem of overheating of the blade clamping tooling and the thermal protection of the vibration table used for the high cycle fatigue test. , to avoid damage to the vibration table due to insufficient thermal isolation. At present, asbestos pads are usually used as a hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 滕光蓉朱靖李光辉张欢董军肖潇张震相王艳丰陈妍李艳
Owner AECC SICHUAN GAS TURBINE RES INST
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