A plug nozzle and its sealing structure
A plug-type nozzle and sealing structure technology, applied in jet propulsion devices, machines/engines, etc., can solve the problems of nozzle performance degradation, inaccurate test results, lack of high-temperature gas, etc.
Active Publication Date: 2017-02-01
AECC SHENYANG ENGINE RES INST
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Problems solved by technology
[0002] Due to the requirement of high thrust-to-weight ratio aero-engine core engine test, it is necessary to design a plug nozzle with adjustable throat area to adapt to the flow change of the core engine. Since the gas pressure inside the nozzle is greater than the ambient pressure outside the nozzle, high-temperature gas will leak from the sliding gap during the movement of the rear part of the outer wall, resulting in reduced performance of the nozzle and inaccurate test results
[0003] In the prior art, there is a lack of a sealing structure to solve the above-mentioned problem that high-temperature gas leaks from the sliding gap during the movement of the rear section of the outer wall
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[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The embodiments of the pre...
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The invention discloses a plug type spray pipe and a sealing structure. The plug type spray pipe comprises a first fixing wall, a second fixing wall, a sliding arm and the sealing structure, wherein the first fixing wall is a bent plate and comprises a first plate and a second plate which are mutually perpendicular, the second fixing wall is a bent plate and comprises a third plate and a fourth plate which are mutually perpendicular, the third plate is detachably connected with the first plate, the second plate is opposite to the fourth plate, a branch air channel is formed between the second plate and the fourth plate and is filled with flowing air, the sliding arm is attached to the second plate and can slide with respect to the second plate, the sealing structure is arranged between the sliding arm and the second plate and used for sealing the attached position between the sliding arm and the second plate and preventing flowing air in the branch air channel from flowing out of the attachment position between the sliding arm and the second plate. By means of the structure, the flowing air in the branch air channel can be well prevented from flowing out of the attachment position between the sliding arm and the second plate, and the problem that the attachment position cannot be sealed in the prior art is solved.
Description
technical field [0001] The invention relates to the field of engine nozzles, in particular to a plug nozzle and a sealing structure. Background technique [0002] Due to the requirement of high thrust-to-weight ratio aero-engine core engine test, it is necessary to design a plug nozzle with adjustable throat area to adapt to the flow change of the core engine. The throat area of the plug nozzle can be adjusted through the outer wall of the plug nozzle. Since the gas pressure in the nozzle is greater than the ambient pressure outside the nozzle, the phenomenon of high-temperature gas leakage from the sliding gap will occur during the movement of the rear section of the outer wall, which will reduce the performance of the nozzle and make the test results inaccurate. [0003] In the prior art, there is a lack of a sealing structure to solve the above-mentioned problem of leakage of high-temperature gas from the sliding gap during the movement of the rear section of the outer ...
Claims
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IPC IPC(8): F02K1/78F02K1/82
Inventor 任濬哲张少丽赵春生
Owner AECC SHENYANG ENGINE RES INST