Determine the specific test pressure based on the intended use or flight profile of the equipment.
a. Ground: If the measurement data is not available, the pressure value is determined according to the maximum height of 4570m (corresponding to atmospheric pressure is 57kPA). It is a different type of loading when equipped for the transport aircraft, and the type of the booster system is also different Aircrafts have different "cruising altitudes", which may not reach the normal "cruising altitudes" when transporting extremely heavy equipment. Most pressurization systems only provide outside atmospheric pressure through the cabin before the aircraft reaches a certain altitude. After this height, a specified pressure is maintained. In addition to the equipment design requirements for transportation by aircraft with a specific cargo tank pressure, the following guidance data should be used:
1. For Procedure 1 and Procedure 2, the cargo tank pressure is the pressure corresponding to the height of 4570 (the corresponding atmospheric pressure is 57kpa);
2. For Procedure 3 and Procedure 4, the initial pressure in the cargo tank adopts the pressure corresponding to the height of 2438m (the corresponding atmospheric pressure is 75.2kpa), and the final pressure in the cargo tank after decompression adopts the pressure corresponding to the height of 12192m (The corresponding atmospheric pressure is 18.8kPA).
High and low temperature and low pressure test chamber altitude change rate: If the specific altitude change rate (climb / descent rate) is unknown, or the relevant documents are not specified, the following guidance data can be used for reference: When the military transport aircraft takes full thrust, its average The altitude change rate is usually 7.6m / S. Unless it is proved that the platform environment to be used needs to adopt other altitude change rate or otherwise specified, the test chamber adopts the altitude change rate of 10M / s. High and low temperature low pressure test chamber test pressure
Hard alloy Lianxiang tungsten steel for milling cutter bit
Hard alloy Lianxiang tungsten steel for milling cutter bit
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