Metal Hose Manufacturers Teach You How To Use Metal Hoses


    Metal hose has the advantages of light weight, small volume, high pressure, corrosion resistance, high and low temperature resistance, fatigue resistance, good flexibility, etc. It can absorb vibration, compensate for installation offset and pipeline displacement, and is widely used in aviation, aerospace, ship and Weapons and other fields. At present, metal hoses on aero engines are often used to compensate for manufacturing deviations and thermal deviations, while compensating for large motion displacements has not been applied in the development of large and medium-sized turbojet and turbofan engines in China. In this paper, the ability of the metal hose to compensate for the displacement of the tubular shape during operation is analyzed and studied.

    The metal hose is welded by the mesh part and the joints at both ends, wherein the mesh body is welded by a metal bellows, a pipe, a ring and a wire mesh sleeve. Limited by the structure of the metal bellows, the metal hose cannot be excessively bent and subjected to axial load, and the life is greatly shortened when subjected to torsional stress or alternating stress. Therefore, the metal hose needs to be properly installed and fixed in a limited space on the engine, and it is also difficult to meet the motion displacement compensation requirement.

    (1) A pipe interface connection between the engine and the aircraft accessory casing.

    (2) The engine and the equipped aircraft accessories machine share the lubricating oil system, and the metal hose realizes the working medium of the conveying oil system.

    (3) According to the space position and interface requirements of a certain type of engine and aircraft accessory casing, the metal hose adopts a combination structure of hard pipe and hose, and the space angle between the engine and the aircraft accessory casing interface is adopted through the hard pipe parts at both ends. Converted to a flat angle, the flexible part of the hose is in the form of a circular arc in one plane. The structural dimensions of the metal hose.


    (1) In the design of a certain type of engine metal hose, inherit the mature technology of the existing metal hose from the aspects of structure and process, and reduce the development risk.

    (2) The metal hose length and static bending radius meet the installation and fixing requirements on the engine; the minimum radius of curvature during operation meets the dynamic bending radius requirements.

    (3) The metal hose can meet the displacement compensation requirements of the engine.

    The above is the application of metal hoses shared by metal hose manufacturers on aero engines.

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