Multi-degree-of-freedom sealing pipeline joint of aero-engine

Abstract

The invention relates to a multi-degree-of-freedom sealing pipeline joint of an aero-engine. The multi-degree-of-freedom sealing pipeline joint comprises a flat pipe nozzle, a spherical pipe joint, a flat pipe nozzle fastening block and an additional nut, the pipe joint is in a spherical shape, the front end of the pipe joint is provided with a horn mouth, and the spherical surface of the pipe joint is a sealing surface; the fastening block is spherical and is provided with an inner mounting edge spherical surface; a sealing pipe connecting nozzle arranged at the front end of the flat pipe nozzle is hemispherical, the inner spherical surface of the sealing pipe connecting nozzle is a concentric sealing surface, and the outer spherical surface is matched with the concentric spherical surface of the fastening block; the fastening block is sleeved on the outer spherical surface of the sealing pipe connecting nozzle of the flat pipe nozzle, and the front spherical surface of the pipe joint is matched with the inner spherical surface of the flat pipe nozzle to form a spherical sealing strip; the additional nut is sleeved on the fastening block and the pipe joint, the rear spherical surface of the pipe joint is matched with the inner spherical surface of the upper end of the additional nut, the inner spherical surface of the lower end of the additional nut is matched with the outer spherical surface of the fastening block, and tightening torque is converted into concentric force. The assembly stress of the guide pipe can be reduced to the minimum, so that the dynamic stress level of the pipeline is reduced, and safe and reliable work of the pipeline is guaranteed.

Description

Technical field [0001] The present invention relates to the field of aeroengi line joints, in particular, an aero-engine multi-freedom sealing pipe joint. Background technique [0002] Aviation engine pipe joints are generally consisting of inserted structures, cone on ball joints and cone tapered structures, and existing pipe joint structures require high coaxial degrees at both ends of the pipe joints, which in turn can achieve assembly to ensure sealing effect. . However, once there is a certain deviation between the pipe joints such as the axial dimension of the pipe joint or the angular deviation, the line cannot be assembled, and the pipe is not assembled, and the engine guide is required to be corrected, and the assembly time of the engine is increased, and the sealing of the pipeline If you don't guarantee, there is a big probability that the pipeline sealing failure problem occurs. Inventive content [0003] It is an object of the present invention to provide an aeronau...

AI Technical Summary

Problems solved by technology

However, once there is a certain deviation at both ends of the pipe joint, such as the axial dimension deviation or angular deviation of the pipe joint, the pipeline cannot be assembled, and the engine pipe needs to be removed for correction, which increases the assembly time of the engine, and the tightness of the pipeline If it is not guaranteed, there is a high probability that the pipeline seal failure problem will occur

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