Since modern military and civilian aircraft generally fly in the sky with a very thin air of about 10,000 meters, the airborne equipment is bound to withstand the harsher low air pressure. The low-pressure environment of the high-temperature and low-pressure test chamber has a great influence on the airborne equipment. The specific performance is as follows:
1. Impact on sealing equipment Generally, when most equipment is produced, its internal pressure is balanced with the local atmospheric pressure. When the ambient atmospheric pressure is lowered, a pressure difference is formed between the inside and the outside of the equipment, and the equipment casing will be subjected to an outward expansion force. This force can deform and rupture the casing, causing equipment failure.
2, the impact on volatile substances Liquid volatilization speed will be greatly accelerated under low pressure conditions. The performance is lost when the aircraft fuel evaporates, the lubricating oil (fat) volatilizes, causing the friction of the moving parts to increase, and the active surface is accelerated to abrade. These volatile substances also pollute the surrounding environment and cause other equipment to be corroded.
3. Influence on electrical performance Atmospheric pressure is reduced, and partial discharge phenomenon occurs in the vicinity of the electrode with strong electric field strength. In severe cases, air gap breakdown occurs, and the normal working state of the device is destroyed.
4. Influence on heat dissipation equipment A considerable part of airborne equipment is a heat-generating device. As the atmospheric pressure is lowered, the heat dissipation of the device is difficult and the temperature is raised.
In summary, due to the reduction in atmospheric pressure, the mechanical and electrical performance of airborne equipment can be greatly affected, sometimes leading to equipment failure. Therefore, there should be low air pressure requirements for airborne equipment. The effect of low air pressure on the equipment cannot be simulated under normal atmospheric conditions. Therefore, equipment that is subject to low air pressure conditions should be tested for low air pressure. The recommended equipment is YSL/DQY-100, YSL/DQY-225, YSL/DQY- 500, YSL/DQY-800, YSL/DQY-010 high and low temperature low pressure test chamber, the specific model is determined according to the sample size.
This catagory includes vaious pet leashes.
Pet Leashes
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