Fixing structure of stress application outer ring header pipe

Abstract

According to the fixing structure of the stress application outer ring header pipe, three first installation structures and a plurality of second installation structures are arranged on a diffuser casing, and in each first installation structure, due to the fact that a hanging lining and an installation base are connected through a rotatable spherical surface, the hanging lining can only swing around the spherical surface and cannot move in the radial direction. The three first installation structures determine a plane, and the first installation structures are installed in a free state and used for determining the position of the overall annular stress application outer ring header pipe structure. In the second mounting structure, the outer surface of the ball body is connected with the blanking cap through the rotatable spherical surface, and meanwhile, the hanging pin can slide in the through hole of the ball body; therefore, the hanging pin not only can rotate and swing around the spherical surface, but also can slide in the through hole of the ball body, and the degree of freedom is increased. The first mounting structure is matched with the second mounting structure, so that the stress concentration of the integral annular stress application outer ring header pipe structure can be avoided, and the assembly stress is reduced.

Description

technical field [0001] The invention relates to the technical field of aero-engine booster outer ring manifold structure, in particular to a fixing structure of booster outer ring manifold. Background technique [0002] The main pipe of the afterburner outer ring is generally designed to connect ear seats on the main pipe, and is fixed to the outer wall of the diffuser by means of built-in tie rods or struts. The header pipe is an important part of the diffuser, and it has relatively high requirements for fixing constraints. If there are fewer fixed fulcrums, in the afterburner, where high and low temperatures alternately exist and the alternating load is large, with the working time increase, the manifold is prone to deformation, which cannot meet its requirements for constraint reliability, stability and flatness. [0003] On the other hand, the afterburner outer ring header is a ring structure formed by welding pipes of different diameters and lugs one by one. The ring w...

AI Technical Summary

Problems solved by technology

At the same time, the main pipe is also subjected to the impact of the gas flow and the vibration stress of the engine during use, resulting in greater stress in actual work.

As the number of fulcrums increases, the assembly stress increases, and the rigidity of the connection is too strong, which is prone to mechanical fatigue wear, wear-out or even fracture, and reduces the service life

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