A retractable gas supply duct for a slender combustion chamber

Abstract

The invention provides a telescopic gas supply pipeline for a slender combustion chamber, and belongs to the technical field of aerospace propulsion power systems. The telescopic gas supply pipeline for the slender combustion chamber comprises an outermost pipeline, an innermost pipeline, a middle pipeline, a pipeline sealing ring, a guide rod, a guide structure, a driving device and a fixing device. The driving device comprises a frequency modulation motor, a motor base and a gear. The fixing device comprises a bearing end cover, a cylindrical roller bearing, a flange plate, a fixing rod, a sleeve, a bearing end cover sealing ring and a supporting rod. The pipeline can be controlled in a single side, the continuous extension and shortening of the pipeline are achieved in a limited space,the stretching at different speeds and rapid stopping switching can be achieved, and the function switching is rapid. Through screw thread transmission of a screw rod, the telescopic supply is accurate and reliable, and the pipeline has good sealing performance and is suitable for operation and use in a high-pressure environment. The telescopic gas supply pipeline for the slender combustion chamber of the invention is simple in structure, stable in operation and convenient to maintain, and can be simply modified to be suitable for working environments with different depths, lengths and spaces.

Description

technical field [0001] The invention relates to a telescopic air supply pipeline for a slender combustion chamber, belonging to the technical field of aerospace propulsion power systems. Background technique [0002] During the design and use of aerospace engines, thermoacoustic instability is usually faced. Thermoacoustic instability is an unstable phenomenon caused by the mutual coupling and amplification of unstable heat release and sound waves. It involves various aspects such as fluid, combustion, heat transfer, and acoustics, and occurs in various power devices. Its serious destructiveness and strong noise have triggered in-depth research in various aspects. [0003] In 1859, Rijke placed a hot wire mesh at a certain position in the lower half of a pipe (that is, a combustion chamber) that was open at both ends and placed vertically, and immediately there was a strong sound vibration in the pipe. In the slow flow of air in the pipeline, there are two states of compre...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem that the length and position of the gas supply pipeline of the burner cannot be effectively adjusted due to the limitation of the structural space of the combustion chamber in the Rijke tube experiment, resulting in the inability to flexibly adjust the position of the heat source. A retractable gas supply duct for a slender combustion chamber

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