The reason why the high pressure hose loses stability
Sometimes when we use a high-pressure hose, we will find that it will lose stability, resulting in the high-pressure hose not working properly. Under what circumstances will the high-pressure hose lose stability?
When the high-pressure hose is subjected to a pressure in the axial direction beyond the pressure it can support, it will suddenly bend like a compression rod or a cylindrical coil spring and lose its linear shape stability. This is inevitable. If the high pressure hose is subjected to an internal pressure that exceeds a certain pressure value that it can support, it will also cause instability. Experiments have shown that most of the damage to high pressure hoses in engineering is due to this reason. Whether it is an elastic seal, an axial expansion compensator, or a hose, there is such a problem.
That is to say, the ability of a high pressure hose to withstand internal pressure generally depends on its stability. To study the stability of high-pressure hoses, the critical load can be calculated by referring to the well-known Euler pressure bar formula.
Because of the processing deviations in corrugated geometry, material thickness, etc., the high pressure hose and the PTFE axis are often offset from the original axis of symmetry. That is, there is some initial curvature of the axis of the actual high pressure hose. For the hose, the unevenness of the mesh weave and the inconsistency of the strength of each part also limit the carrying capacity of the high pressure hose.