Turnover-type thermal shock and thermal fatigue test platform

Abstract

The invention relates to a turnover-type thermal shock and thermal fatigue test platform, which belongs to the technical field of test appliances. The turnover-type thermal shock and thermal fatigue test platform comprises a test platform support, a first infrared thermometer, a first test piece, a heat preservation cavity support, a heating device, a second test piece, a heat preservation cavity,a hood, an exhaust manifold, a high-temperature pipe fan, a first clamp, a second infrared thermometer, a swing cylinder, a linear guide rail, a first position sensor, a linear cylinder, a sliding block, a second position sensor, a third infrared thermometer, a T-type rod, a second clamp, a cooling device and a controller. Two test pieces can be tested at the same time, one is heated and the other one is cooled, the two test pieces turn over vertically for 180 DEG under driving of the swing cylinder, and the two test pieces can rotate together with a working platform to exchange working positions under driving of the swing cylinder. The turnover-type thermal shock and thermal fatigue test platform is simple, practical and high in working efficiency, and in the case of simulated experimental study on thermal shock and thermal fatigue of a piston in an internal combustion engine, the test cost can be saved, and the research and development period of related parts can be greatly shortened.

Description

technical field [0001] The invention relates to a flip-type thermal shock and thermal fatigue test platform, which is applied to a test platform for strength assessment of mechanical heated parts and belongs to the technical field of test supplies. Background technique [0002] The automobile industry is one of the most important industries in economically developed countries, and the heart of the automobile is the internal combustion engine. With the rapid development of science and technology, the engine is developing in the direction of high power and high speed. With the continuous increase of engine speed and power, combustion chamber Burst pressure and temperature will continue to increase. The increase of the explosion pressure increases the heat load of the piston, cylinder head, exhaust pipe, turbine, and cylinder liner, resulting in greater thermal stress and thermal deformation. Under the action of the heat load, the piston, cylinder head, and exhaust pipe of the ...

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Problems solved by technology

The increase of the explosion pressure increases the heat load of the piston, cylinder head, exhaust pipe, turbine, and cylinder liner, resulting in greater thermal stress and thermal deformation. Under the action of the heat load, the piston, cylinder head, and exhaust pipe of the engine , The strength and hardness of the turbine and cylinder liner materials have dropped sharply, which has reduced their reliability and life, and are more prone to cracks, cracks, and even fractures. When these heated parts do not make corresponding technical improvements or improvements Improper, such as unreasonable structural design, insufficient cooling capacity, insufficient thermal strength of materials, etc., these heated parts will not meet the requirements of use and will seriously affect the reliability and durability of the whole machine

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