Long and thin double-engine air inlet channel structure and assembling method

An air inlet and flange technology, which is applied in the field of slender dual-engine air inlet structure and assembly, can solve the problems of many frames in the air inlet assembly area, difficulty in demoulding the forming tool, and limited connection channels, etc. The effect of good surface quality, easy accurate positioning and assembly, and low process risk

Active Publication Date: 2021-11-12
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the difficulty in demoulding the composite material molding tooling of the slender and complex cross-section air inlet in the prior art. There are many frames in the air inlet assembly area and are not segmented, the connecting passage will be limited, and the assembly Difficult insufficiency, providing a slender double engine inlet structure and assembly method

Method used

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  • Long and thin double-engine air inlet channel structure and assembling method
  • Long and thin double-engine air inlet channel structure and assembling method
  • Long and thin double-engine air inlet channel structure and assembling method

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Effect test

Embodiment 1

[0050] A dual engine inlet structure, such as Figure 1-3 As shown, it includes two air inlets arranged side by side, and the two air inlets have the same structure; they are arranged symmetrically in the frame structure. Among them, the total length of each air inlet is 2285mm, and the air inlet is irregularly flat and gradually transitions to a circle. Each air inlet includes a front section 1 of the air inlet and a rear section 2 of the air inlet that are detachably connected; From the front section 1 of the air intake duct to the rear section 2 of the air intake duct, a plurality of assembly frames for fixing to the frame are sequentially arranged at intervals. The first half of the inlet is S-shaped, and the second half is straight. The cross-section width of the air inlet is 85-290mm, and the diameter of the straight section of the air inlet is 166mm.

[0051] Specifically, the assembly frame includes a first fixed frame 4, a second fixed frame 5, a third fixed frame 6...

Embodiment 2

[0060] A kind of assembly method of double-engine inlet, such as Figure 4-9 As shown, the double-engine intake port structure comprising embodiment 1 specifically includes the following steps:

[0061] Step 1, respectively fixing the flange, the first connecting ring and the second connecting ring on corresponding positions of the air inlet;

[0062] Step 2. Position and assemble the lower half frame of the second fixed frame, the third fixed frame, the fourth fixed frame, the lower half frame of the fifth fixed frame and the sixth fixed frame in the body skeleton; The fixed frame, the upper half frame of the second fixed frame and the upper half frame of the fifth fixed frame are pre-assembled, and disassembled after the pre-assembly is completed;

[0063] Step 3. Put the front section of the air inlet into the body frame from front to back, and put the rear section of the air inlet into the body frame from back to front;

[0064] Step 4: Reinstall the lip in step 2 and th...

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Abstract

The invention belongs to the field of aircraft structure design, and particularly relates to a long and thin double-engine air inlet channel structure and an assembling method. The double-engine air inlet channel comprises two air inlet channels which are symmetrically arranged in parallel, and each air inlet channel comprises an air inlet channel front section and an air inlet channel rear section which are detachably connected; and a plurality of assembly frames used for being fixed to a rack are sequentially arranged from the air inlet channel front section to the air inlet channel rear section at intervals. According to the long and thin double-engine air inlet channel structure, due to the limitation of the complex structure of the air inlet channel, in the assembling process, the connecting channel of the air inlet channel structure is limited, and assembling is difficult; the double-engine air inlet channel is designed to be of a front and rear segmented structure, smooth demolding of an air inlet channel forming tool is facilitated, the quality of the inner molded surface of the air inlet channel is guaranteed, in the assembling process, the front section of the air inlet channel is placed in a variable-angle mode before self-propulsion, the rear section of the air inlet channel is placed in a variable-angle mode after self-propulsion, and then multiple assembling frames fixed to a rack are reasonably arranged; the quick assembly of the air inlet channel is realized, and the technical problem of difficulty in manufacturing and assembly is solved.

Description

technical field [0001] The invention belongs to the field of aircraft structure design, in particular to a slender double-engine air intake structure and an assembly method. Background technique [0002] At present, the competition in the domestic small and medium-sized UAV industry is very fierce, and cost control and manufacturing and assembly efficiency are one of the development goals. Cost control, first, depends on the complexity of the structural shape; second, it depends on the choice of structural materials; third, it depends on the ease of manufacturing; fourth, it depends on the ease of assembly. [0003] The slender double-engine inlets of existing small and medium-sized UAVs generally have complex curved surfaces, and sheet metal structures can be used, but there are many pieces, and the sheet metal parts are very easy to deform, making positioning and assembly difficult. In order to make the double-engine inlet with metal structure have stealth performance, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D33/02B64F5/10
CPCB64D33/02B64F5/10
Inventor 罗丹杜发喜杨文方雄王珏熊建华沈彬
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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