The invention belongs to the field of engine bleed air pipeline design, and relates to a high-temperature bleed air anti-backflow device which comprises a first pipeline assembly, a second pipeline assembly, a valve assembly and a quick-release clamp assembly. The valve assembly comprises a base, an inner shell and a sealing cover plate. The outer wall of the base is in sealing fit with the inner walls of the first pipeline assembly and the second pipeline assembly. The inner shell is arranged on the base, the sealing cover plate is rotationally connected with the inner shell, and the sealing cover plate can be driven by airflow to rotate and form an opening state and a closing state; when air flow flows in from the second pipeline assembly, the air flow firstly enters the base position of the valve assembly, the sealing cover plate is pushed to rotate to an open state, and the air flow flows into the second pipeline assembly; when reverse airflow occurs in the second pipeline assembly, the sealing cover plate is driven to rotate from the open state to the closed state, and high-temperature entrained air is prevented from flowing backwards. The valve assembly is small in occupied space and light in weight, and the requirement that the aero-engine core cabin pipeline arrangement space is increasingly strained is met.
本申请属于发动机引气管路设计领域,为一种高温引气防倒灌装置,包括第一管路组件、第二管路组件、活门组件和快卸卡箍组件;活门组件包括底座、内壳体和密封盖板,底座的外壁与第一管路组件和第二管路组件的内壁密封配合;内壳体设于底座上,密封盖板与内壳体转动连接,密封盖板能够在气流的带动下转动并形成开启状态和关闭状态;当气流从第二管路组件内流入时,先进入到活门组件的底座位置,推动密封盖板转动至打开状态,使得气流流入至第二管路组件内;当第二管路组件内出现逆向气流时,带动密封盖板由打开状态转动至关闭状态,防止高温引气倒灌。活门组件占用空间小、重量轻,满足航空发动机核心舱管路布置空间越来越紧张的要求。
High-temperature air-entraining anti-backflow device
一种高温引气防倒灌装置
2023-07-18
Patent
Electronic Resource
Chinese
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