Thermal compensation device of special-shaped spray pipe heat shield

Abstract

The invention provides a thermal compensation device of a special-shaped spray pipe heat shield, and relates to the technical field of aero-engine spray pipes. The thermal compensation device comprises the special-shaped heat shield, wherein a plurality of L-shaped supports are evenly fixed to the outer side of the special-shaped heat shield at intervals, lifting lugs are assembled on longitudinalsections of the L-shaped supports, and assembly gaps are reserved in the assembly positions between the lifting lugs and the longitudinal sections of the L-shaped supports, so that the lifting lugs are movably connected with the L-shaped supports; and assembling holes for assembling the lifting lugs on the longitudinal sections of the L-shaped supports are circular holes or kidney-shaped holes. By means of the L-shaped supports, the lifting lugs and an arch-shaped frame combined structure assembled on the outer surface of the special-shaped heat shield, radial heat deformation of the special-shaped heat shield after being heated is effectively converted into the axis direction and the circumferential direction, the molded surface sizes of inner and outer ducts are guaranteed, and the pneumatic and invisible performance of a spray pipe is guaranteed.

Description

technical field [0001] The disclosure relates to the technical field of aeroengine nozzles, in particular to a heat compensation device for a special-shaped nozzle heat shield. Background technique [0002] High stealth performance is the trend of future aircraft research and development. The design technology of the low-detectable and large-curvature special-shaped nozzle is a new stealth technology based on this. The low-detectable large-curvature special-shaped nozzle not only has good stealth performance, but also facilitates integration with the rear body. The advantage of design is a research hotspot in recent years. [0003] Compared with the traditional axisymmetric nozzle, the low-detectable large-curvature special-shaped nozzle has a non-axisymmetric cross-section and a curved centerline, which requires the ability to completely block the rearward visible high-temperature components. precedent. At the same time, when the engine air flow is applied to the non-axi...

AI Technical Summary

Problems solved by technology

[0005] At present, the design of special-shaped nozzles is in its infancy, and the research on the effective thermal compensation connection structure of heat shields for special-shaped nozzles is not yet in-depth. There is an urgent need for a combined thermal compensation connection structure that can adapt to high temperature and high pressure working environments to meet the functional requirements of special-shaped nozzles.

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