HC

中文版

English

Español

Русский

APPLICATION

Aerospace

Ocean engineering

Metallurgical industry

Other industries

Aerospace

At present, the hydraulic oil pipeline system of aero-engine usually has a high pressure range between 21MPa and 28MPa. Due to the operation of the hydraulic pump, a certain pulse will be generated, causing the pressure in the pipe to fluctuate, which will greatly affect the service life of the engine conduit. influences. At the same time, because the engine pipeline is a closed circulation system, the pipeline will expand and contract due to thermal expansion and contraction during installation, which will cause stress concentration and eventually lead to the rupture of the pipeline.

Modern aero-engines mainly use metal hoses and non-metal PTFE hoses in two different systems. Metal hose is a pipe fitting with corrugated pipe as the core component, which can compensate between pipes and pipes, pipes and equipment, and has the advantages of light weight, good flexibility, high pressure bearing, and high and low temperature resistance. Non-metal PTFE hoses are mainly pipe fittings with PTFE as the core component. They have the advantages of small size, corrosion resistance and fatigue resistance. They are widely used in ships, mining, metallurgy, petroleum, construction machinery and other fields.

Due to the high temperature resistance of metal hoses, but compared with the characteristics of poor fatigue resistance of PTFE hoses, we are mostly used in bleed air systems in aero-engines, especially the parts where the external casing is connected. Due to the different magnitudes of thermal expansion and contraction of the connecting pipeline, the leakage of the air bleed pipeline. Due to the good fatigue resistance of non-metallic PTFE hoses, the number of hydraulic oil pulses inside the tube can reach more than 250,000 times, so non-metallic PTFE hoses are mostly used in hydraulic oil pipelines such as aviation engine fuel and lubricating oil. system to solve the thermal compensation problem of hydraulic oil pipeline system. These hoses can fully absorb the installation stress, deformation stress, internal stress and other stresses in the pipeline system, compensate the position movement of the pipeline and absorb the vibration of the pipeline system, and can prevent the deformation of the supporting system due to uneven foundation settlement. , leakage, has a good absorption effect on the changes caused by thermal expansion and contraction of the piping system, and is an indispensable and important accessory for modern piping systems. The hose can be bent at will under its own minimum bending radius, so it can meet the installation requirements of most pipelines and has a certain protective effect on the operation of the engine system. Under some special severe conditions (vibration, dust, impact, acceleration, acidic atmosphere, etc.), using hoses to compensate engine pipelines can not only absorb vibration, but also improve the system's ability to resist fatigue damage, corrosion resistance, and even achieve The effect of reducing noise, etc., better improve the performance and service life of aero-engines.