Multi-nozzle ejector for inflating civil aircraft slides

Abstract

The invention discloses a multi-nozzle ejector for inflating civil aircraft slides. The ejector comprises a sucking chamber and a mixing chamber, the lower end of the sucking chamber is sleeved with the upper end of the mixing chamber, a nozzle assembly is arranged between the sucking chamber and the mixing chamber, an air inlet in the upper end of the sucking chamber is provided with a shutoff valve, the air inlet end of the nozzle assembly is connected with a high-pressure gas connector, the nozzle assembly includes a plurality of nozzles, and the nozzles are connected with the mixing chamber; the nozzle assembly comprises a plurality of annular air inlet branch pipes which are concentrically arranged and a main air inlet pipe, the main air inlet pipe transversely penetrates through theannular air inlet branch pipes and is communicated with each annular air inlet branch pipe, a plurality of nozzles are evenly distributed on each annular air inlet branch pipe and face the mixing chamber, and the air inlet end of the main air inlet pipe is connected with the high-pressure gas connector. The ejection efficiency is improved, the structure is simple and reliable, the size and lengthare reduced, and the package size and weight of the slide products are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of slide inflation equipment, in particular to a multi-nozzle injector used for inflation of civil aircraft slides. Background technique [0002] The emergency evacuation slide is an inflatable off-board life-saving equipment used after an emergency land (water) landing of large and medium-sized civil aviation airliners. The inflation time of the slide generally requires 4 to 6 seconds to reach the working pressure, and the installation interface of the aircraft has strict restrictions on the size of the slide. , making it impossible to expect to use an oversized cylinder to solve the problem of rapid inflation. The ejector can use the high-pressure gas in the onboard gas cylinder as the working fluid, and use the Venturi effect formed inside the ejector to suck a large amount of air into the slide from the external environment, which can quickly inflate the slide. The purpose is to meet the requirements of...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the structure and layout of the nozzle, the ejector has low ejection efficiency and large volume, and the one-way sealing mechanism generally adopts a spring-driven linkage mechanism, which has a complicated structure and is difficult to manufacture and assemble.

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