tony_tj 发表于 2014-7-5 21:21:42

Booster Stage Bleed Valve （BSBV）中文俗称叫什么？

V2500发动机的Booster Stage Bleed Valve （BSBV）中文俗称叫什么？有知道的大侠说一下哈

ke408219905 发表于 2014-7-5 23:32:12

增强级引气活门 OR 增压级引气活门
N久之前听老师傅说过，不太确定

HelloSky 发表于 2014-7-6 06:43:59

增压机引气活门系统在站位2.5将空气从低压压气机释放到外涵道。改善了发动机启动和过渡态时的喘振裕度。在发动机启动时完全打开，在加速时逐渐关闭，在巡航和降落时完全关闭，在减速和反推操作时完全打开。在喘振时打开以恢复压气机中的气流。BSBV是连续的环形活门，通过旋转来打开和关闭。一对BSBV作动筒通过连杆和作动筒杆驱动十个支撑臂。作动筒以来自FMU的高压燃油作为液压中介，位置是高压压气机两侧的中间级机匣。仅左边的作动筒通过扭力马达与EEC连接，它是主作动筒，而右边的是从作动筒。两个作动筒以液压连接实现同步运作。主作动筒包括了一个LVDT，将作动筒的位置从而BSBV的位置传递给EEC。

其实就是基础执照教材中的放气活门。

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The Booster Stage Bleed V alve (BSBV) System discharges air from the Low Pressure compressor at engine station 2.5 into the fan air duct. The BSBV gives improved surge margin during engine start and transient operation. The bleed valve is controlled by the EEC and is fully modulating, between the fully open and the fully closed positions. For starting the BSBV is fully open and will be progressively close during engine acceleration, while during cruise and take off the valve is fully closed. For deceleration and engine operation in reverse thrust the valve is fully open. In the event of an engine surge the valve is opened to recover the airflow through the compressor. The BSBV is a continuous ring valve that rotates and slides forward to open and rearwards to close. Ten support arms are driven via a lever and actuating rod by both BSBV actuators. The two actuators use the high-pressure fuel from the FMU as a hydraulic medium. The two BSBV actuators use pressurized fuel from the Fuel Metering Unit (FMU) as a hydraulic medium. The actuators are located on the rear of the intermediate casing on both sides of the High Pressure Compressor. Only the left actuator interfaces with the EEC through a torque motor and is identified as the MasterActuator. The actuator on the right hand side is identified as the SlaveActuator. The two actuators are hydraulically linked to carry out a simultaneous operation. The Master Actuator includes a LVDT , which transmits the actuator position and therefore the BSBV position to the EEC.

亦然之路 发表于 2014-7-6 08:54:50

就是只放气活门

正义刀侠 发表于 2014-7-6 13:03:41

经常遇到，原来是这个。

shihan_5201314 发表于 2014-7-17 10:03:52

讲白了就是2.5级放气活门

kli_08 发表于 2014-7-22 07:37:38

增压级放气活门
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