High-low temperature current-carrying fatigue test system for air-conditioning duct of airplane

Abstract

The invention relates to a high-low temperature current-carrying fatigue test system for an air-conditioning duct for an airplane, and the system comprises a simulation wind path which is used as a test wind path of the test system through simulating a real air-conditioning wind path of the airplane; the simulation unit is used for simulating various environment working conditions of the aircraft air conditioning system in flight; the detection unit comprises a plurality of sensor devices and is used for detecting working condition data and environment data of each link in the simulation wind path; wherein the simulation wind path comprises a plurality of pipelines and pipeline accessories which are scaled according to the equal proportion of a real air conditioner wind path, the simulation unit comprises a plurality of test sections and wraps the multiple sections of wind path pipelines, and the external temperature and the vibration environment of the pipelines in the working process are simulated, so that the simulation wind path can be simulated. And performing a fatigue test on the simulated wind path and analyzing according to fatigue test data.

Description

technical field [0001] The invention relates to the technical field of simulation experiments. Specifically, it relates to a high and low temperature current-carrying fatigue test system for an air-conditioning air duct used in an aircraft. Background technique [0002] With the improvement of people's living standards, aircrafts play an important role in travel, transportation and other applications as large-scale fast transportation; and as people's requirements for aircraft riding experience increase, the comfort in the cabin is getting higher and higher. requirements. In the current related research fields, one is that the air-conditioning system of the aircraft has been in a long-term working state, and the inside of the air duct is in a current-carrying environment with a great difference between high and low temperature for a long time. Various materials of the air duct will have very severe temperature fatigue. question; [0003] Second, due to the compact structu...

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Problems solved by technology

[0003] Second, due to the tight structure of the engine room, the layout of the air duct itself makes it difficult to carry out routine maintenance and repairs, so the design, manufacture and installation of the air duct need to have high reliability;

[0004] Third, as passengers have higher requirements for the air atmosphere in the cabin, the uniformity of air supply from the air-conditioning duct, the controllability of the wind speed, and the uniformity of the temperature in the cabin all directly affect the comfort of passengers; Insulation and sealing in high and low temperature environments will also directly affect the temperature regulation efficiency of the air conditioning unit

[0005] Further, when the aircraft is flying, the difference between the temperature outside the cabin and the temperature inside the cabin can reach tens of degrees; and in the normal working process and during the flight up and down, the temperature inside and outside the pipe of the air duct is also constantly changing; thus it is also possible All kinds of air path problems are generated; common ones are pressure loss caused by pipeline leakage and low air conditioning efficiency; or the strength of the pipeline is reduced due to mechanical fatigue, which eventually leads to abnormal deformation and vibration; further, due to the heat that may be generated at the joints of various components Accumulation, frequent vibration and other reasons are prone to blockage, loosening, leakage and other phenomena after long-term use; therefore, the thermal fatigue and vibration fatigue of the air-conditioning air circuit need to be fully verified before implementation to ensure the safety of the aircraft air-conditioning pipeline sex

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