用途（USAGE）

BE射流（诱导）风机是专为公路、铁路隧道纵向通风换气系统，并在紧急状态下进行烟雾排放控制而设计的动力机械换气设备。同时亦可用于类似隧道、辅助隧道工程场合的通风换气，适用于海拔高度3500米以内工作运行要求。

BE射流（诱导）风机/轴流式消防排烟风机工作条件可在-25℃~50℃环境下连续工作运行，隧道内发生火灾时，可允许在250℃下短时间运行（不超过1h）。

BE jet blower is a mechanical power designed for the vertical ventilation system in railways and highways and can control the smog at emergency time. it can also be applied to the ventilation system of some projects similar to tunnels and side-tunnels.The highest elevation where it can normally operste is at an elevation of 3500 meters high.

BE jet (induction) fan / axial flow fire smoke exhaust fan can operate continuously at- 25 ℃ ~ 50 ℃. In case of fire in the tunnel, it can operate for a short time at 250 ℃ (no more than 1h).

原理(Principle)

BE射流(诱导)风机叶轮叶片采用选的航空动力学原理而设计，经电动机带动其旋转对空气作功，(在设计规定的几何参数下)能产生最大的推力，将气流经出气段高速射出，并带动其周围的空气一起向前流动。当空气流动到接近滞止状态时，又经下一组风机工作，来达到新空气不断地补充，排础污浊的空气，实现隧道内新鲜洁净的空气循环流动。

The impeller and blade of BE Series Jet Blower is designed by adopting advanced aerial dynamic principles.it is motivated by an electronic montor to rotate and exert work to the air.Under the geometric parameter it's design permites,it can produce the strongest thrust power to jet ut the air through the air let-out passage at high speed and to drive the surrounding air to flow forward together.When the flow of air approaches stagnation,the following blower group will continue to work so as to supply fresh air and let out filthy air- continuously.Therefore,the circulation of fresh and clean air in the tunnel will be .

结构(Structureee）

BE射流(诱导)风机由三段组成

BE jet blower is compossed of the following three sections

1进气消声段:（集风器、防护网、导流器、整流栅、消声器）

Air let-in and muffing section:(air collector,protective net ,diversion set,rectification grid and muffler

2风机段:机壳部、叶轮(动叶)部、静叶(导叶)部、电动机

Blower section:casing part,impeller(moving blade)part,still blade(guide blade)part and electric motor

3出气消声段:(出气消声器)

Air let-out and muffing section:(air let-out muffler)