Cocoon packaged fire-proof cover of auxiliary power unit
A technology of auxiliary power unit and fire cover, which is applied in the field of aviation, can solve the problems of poor sound insulation, large space, fire detection and complex arrangement of fire extinguishing facilities, etc., and achieve the effects of improving efficiency, reducing noise and reducing consumption
Active Publication Date: 2014-12-24
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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Problems solved by technology
However, the space required to isolate the auxiliary power unit in the engine room is relatively large, the fire detection and fire extinguishing facilities in the cabin are relatively complicated, and the sound insulation performance is poor
Method used
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[0017] The invention will be described in detail below in conjunction with the accompanying drawings.
[0018] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , which is a structural schematic diagram of the cocoon-wrapped auxiliary power unit fire cover of the present invention. The cocoon-wrapped auxiliary power unit fire shield consists of an upper cocoon 1 and a lower cocoon 2 . Wherein, the upper cocoon 1 includes an upper butt joint 5 , a mounting ring joint 7 , a P-shaped sealing ring 8 , a mounting ring 3 , a reinforcing frame 4 and an upper shell 6 . The lower cocoon 2 includes a lower shell 10 and a lower butt joint 9 .
[0019] The upper shell 6 of the upper cocoon 1 is a hollow semi-cylindrical structure, which is connected with the installation flange of the exhaust system. The surface of the upper cocoon 1 is provided with passage holes for the air intake of the auxiliary power unit, the cooling intake pipe, the fire extinguishing pipeline an...
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The invention belongs to the technical field of aviation, and relates to a cocoon packaged fire-proof cover of an auxiliary power unit. The cocoon packaged fire-proof cover of the auxiliary power unit comprises an upper cocoon and a lower cocoon. The upper cocoon comprises an upper butting edges, a reinforced frame, installation rings and an upper shell; the upper butting edge is installed on a side frame of the bottom part of the upper shell through bolts, the two installation rings are arranged on the upper surface of the upper shell, and the reinforced frame is installed between the two installation rings which are arranged on the upper surface of the upper shell. The lower cocoon comprises a lower butting side and a lower shell; and the lower butting side is arranged on the side frame of the top of the lower shell. The upper cocoon and the lower cocoon are butted through the upper butting edge and the lower butting edge to form the cocoon packaged fire-proof cover of the auxiliary power unit. The upper cocoon, the lower cocoon and a P-type sealing ring form the cocoon packaged fire-proof cover, so the structure is compact, the weight is light, the maintenance is convenient, and the sealing performance is good. Simultaneously the design of a fire extinguishing system can be simplified, the use quantity of fire extinguishing agents can be reduced, and fire and noises of the auxiliary power unit can be effectively prevented.
Description
technical field [0001] The invention belongs to the technical field of aviation, and relates to a cocoon-wrapped auxiliary power device fireproof cover. Background technique [0002] According to the airworthiness standard CCAR25, the auxiliary power unit and the aircraft structure should be separated by a firewall. Existing aircraft are generally provided with an independent area in the cabin, and partitions are used to separate the auxiliary power unit from other areas of the aircraft. However, the space required for the isolation of the auxiliary power unit in the engine room is relatively large, and the arrangement of fire detection and fire extinguishing facilities in the cabin is relatively complicated, and the sound insulation performance is poor. Contents of the invention [0003] The purpose of the present invention is to provide a silkworm cocoon-wrapped auxiliary power device fire protection cover with simple structure, convenient disassembly, and functions of ...
Claims
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IPC IPC(8): B64D33/00
Inventor 何晓静钟剑龙缪志松屈展
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA