Backflow combustor case head structure and manufacturing method thereof and engine combustor

Abstract

The invention discloses a casing head structure of a backflow combustion chamber, a manufacturing method thereof, and an engine combustion chamber. The casing head structure of the backflow combustion chamber adopts an annular base structure, including bow bearings arranged alternately along the circumferential direction of the ring base structure. The force beam and the nozzle part, the arc-shaped force-bearing beam and the nozzle part are connected by a smooth transition of the arc surface; the arch-shaped force-bearing beam adopts a bow-shaped base structure in cross section, and the radial dimension of the bow-shaped force-bearing beam is from the combustion chamber casing to the turbine casing The direction gradually decreases; the nozzle part includes a nozzle installation surface between two adjacent bow-shaped load-bearing beams and parallel to the head of the flame tube, a connecting surface at the bottom of the nozzle installation surface and perpendicular to the nozzle installation surface, and the nozzle The installation surface and the connection surface are smoothly transitioned and connected. The casing head structure of the recirculation combustion chamber of the present invention is similar to a frame structure, and does not deform when subjected to a load, and always ensures that the engine rotates and the stator is concentric, avoiding problems such as rotor scraping and vibration.

Description

technical field [0001] The present invention relates to the field of gas turbine engine combustion chambers, and in particular, to a casing head structure of a recirculation combustion chamber. In addition, the present invention also relates to a manufacturing method and an engine combustion chamber including the above-mentioned recirculation combustion chamber casing head structure. Background technique [0002] In the field of small and medium-sized aero-engines, in the combustion chamber of a gas turbine engine, the casing of the combustion chamber is used as the casing of the combustion chamber components. Its function is to contain and support the flame tube, form the internal flow channel of the engine, and at the same time undertake the compressor casing and the turbine casing. . As an important load-bearing component of the engine, the combustion chamber casing not only bears the high pressure of the combustion chamber components itself, but also needs to transmit t...

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Problems solved by technology

[0004] The invention provides a casing head structure of a backflow combustion chamber and its manufacturing method and an engine combustion chamber to solve the problem that the stress and load on the casing head of the existing combustion chamber are large, exceed the stress limit allowed by the material, and be easy to use. Local deformation occurs, which affects the technical problems of engine safety

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