A double-walled flame cylinder and its electric nozzle mounting seat

Abstract

An object of the present invention is to provide an electric nozzle mounting seat, which can prevent the inner wall coating of the diverging wall from falling off due to welding. Another object of the present invention is to provide a double-walled flame cylinder, which has the aforementioned electric nozzle mounting seat. The electric nozzle mounting base for achieving the aforementioned purpose includes a first base body, a second base body, a floating base and a connecting piece. The connecting piece and the first seat body are separate moldings, the connecting piece is connected to the first seat body and has a connecting section protruding axially from the first seat body, and the second seat body axially lower side is welded to the connecting section .

Description

technical field [0001] The invention relates to a double-walled flame tube and its nozzle mounting seat. Background technique [0002] The aero-engine mixes the high-pressure gas and fuel oil from the compressor in the combustion chamber and burns violently to generate high-temperature gas, which in turn drives the compressor to rotate after turbo-expansion. The combustion chamber is the area where the aeroengine organizes combustion to generate energy. It is mainly composed of a diffuser, a fuel nozzle, a flame tube, and an ignition nozzle. The ignition nozzle is a device that provides ignition energy to the combustion chamber to ignite the mixture after the engine is started. [0003] The combustion chamber is organized in the flame tube, and the flame tube structure needs to withstand the repeated action of high-temperature gas. High temperature and hot and cold deformation make the flame tube undergo severe tests. Therefore, the material and process requirements of the ...

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Problems solved by technology

[0005] However, the inventors found that the existing floating sleeve structure can only absorb the axial and circumferential displacements, and avoid the collision caused by the axial and circumferential misalignment of the flame tube, but cannot avoid the deformation bands such as angular deflection and torsion of the flame tube. coming question

In addition, when the mounting seat is welded separately to the impact wall and the diverging wall, in order to avoid affecting the installation of the double wall, the diverging wall mounting seat is often not too much higher than the outer wall of the diverging wall, so the impact wall mounting seat of the existing floating sleeve needs to be lowered. Welding to the diverging wall to fix the connection, this method is likely to cause the coating to fall off due to welding too close to the inner wall of the diverging wall, which is easy to cause local overheating risks at the mounting seat of the diverging wall of the bleed flame tube

In addition, the divergent wall mounting seat needs to be welded on the divergent wall hole in the whole circle. The heat-affected area of ​​the whole circle welding is wide and the energy is high, which often leads to the partial collapse of the divergent wall. The length of the impact wall mounting seat into the divergent wall is limited by the double wall. Gap, after local collapse, the overlap between the impact wall mounting seat and the diverging wall mounting seat will become smaller or even fail to overlap, so that it is impossible to weld the double wall mounting seat

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