2780537 WING THERMAL ANTI-ICE PRESSURE REGULATING AND SHUTOFF VALVE ASSEMBLY

机翼热防冰压力调节和关断活门组件

一、名称

WING THERMAL ANTI-ICE PRESSURE REGULATING AND SHUTOFF VALVE ASSEMBLY

机翼热防冰压力调节和关断活门组件

二、件号

2780537-102~-104

三、章节号

30-10-01

四、适用机型

B757/767

五、系统

30 ICE AND RAIN PROTECTION

防冰防雨

六、安装位置

机翼（靠发动机区域）

七、部件原理

Wing Thermal Anti-Ice (TAI) Valves

机翼热防冰(TAI)活门

(1) Wing TAI valves control the flow of pre-cooled engine bleed air into anti-ice ducts. One valve is above the strut position in each wing.The valves are set to keep the duct air pressure between 20-26 psi.

机翼TAI活门控制预冷发动机引气进入防冰管道的流量。每个机翼的支柱位置上方都有一个活门。活门设置为使管道气压保持在20-26 psi之间。

(2) An indicator on the valve shows when it is CLOSED and when it is NOT CLOSED. You can manually set the valve to the full open or full closed position. A switch on the valve housing permits manual operation. You can lock the valve only in the full closed position.

活门上的指示器显示活门何时关闭和何时未关闭。您可以手动将活门设置为全开或全关位置。活门外壳上的开关可用于手动操作。您可以将活门锁定在全关位置。

(3) When the TAI valve solenoid is energized, it opens an upstream air passage to the actuator diaphragm. When the upstream air pressure is more than the forces of the return spring, the return spring closes. The actuator diaphragm opens the valve vane.

当热防冰活门电磁阀通电时,它将打开通往作动器膜片的上游空气通道。当上游空气压力大于回位弹簧的力时,回位弹簧将关闭。作动器膜片将打开活门板。

(4) When electrical power is removed from the TAI valve solenoid, it closes the upstream air passage to the actuator diaphragm. The actuator diaphragm is opened to ambient air. Upstream air pressure on the closing diaphragm and the return spring close the valve vane.Upstream air pressure keeps the valve vane in the closed position.

当TAI电磁阀断电时,它关闭了通往作动器膜片的上游空气通道。作动器膜片打开,与环境空气连通。关闭膜片上的上游空气压力和复位弹簧关闭了活门板。上游空气压力使活门板保持在关闭位置。

(5) The pilot pressure regulator gets input from the downstream (regulated) pressure regulator. If downstream pressure is more than the adjustment setting of the pilot regulator, a valve bleeds off the actuator diaphragm pressure. The closing diaphragm and the return spring partially close the valve vane.

先导压力调节器从下游(调节)压力调节器获取输入。如果下游压力超过先导调节器的调节设置,则活门会从作动器膜片压力中引气。关闭膜片和复位弹簧会部分关闭活门板。

2. Operation

操作

A. The Wing Thermal Anti-Ice Pressure Regulating and Shutoff Valve Assembly is normally closed. It is held closed by a spring acting against the diaphragm and by upstream control air. The control air is also vented through a fixed orifice to the atmosphere.

机翼热防冰压力调节和关断活门组件通常处于关闭状态。它通过一个作用于膜片的弹簧和上游控制空气保持关闭。控制空气还通过一个固定孔口排入大气。

B. When the solenoid is energized, it closes the control air vent, directing the control air to the diaphragm.The control air acting against the diaphragm, overcomes the spring, and moves the diaphragm which opens the vane. The control valve is now in the regulating mode.

当电磁线圈通电时,它关闭控制空气排出,将控制空气引导至膜片。控制空气作用于膜片,克服弹簧的作用,推动膜片打开叶片。控制活门此时处于调节模式。

C. The pilot housing assembly compares downstream air pressure with a preset value. When the downstream air pressure exceeds the preset value, a poppet opens, venting the control air to the atmosphere. The spring-loaded diaphragm closes the vane. When the downstream air pressure is reduced below the preset value, the poppet closes, which allows the upstream control air to again move the diaphragm and open the vane. The switch assembly indicates whether the vane is “CLOSED” or “NOT CLOSED”.

先导阀壳组件将下游空气压力与预设值进行比较。当下游空气压力超过预设值时,提升阀打开,将控制空气排放到大气中。弹簧载荷膜片关闭活门板。当下游空气压力降低到预设值以下时,提升阀关闭,上游控制空气再次推动膜片并打开活门板。开关组件指示活门板是“关闭”还是“未关闭”。

D. The control vane can be manually operated to the full open or fully closed position, but can be locked only in the closed position.

控制活门板可以手动操作到完全打开或完全关闭的位置,但只能锁定在关闭位置。

八、工作参数

九、在飞机系统中的工作原理及互联

Wing TAI valves control the flow of pre-cooled engine bleed air into anti-ice ducts.

机翼热防冰活门控制预先冷却的发动机引气流入防冰导管。

Wing Thermal Anti-Icing

机翼热防冰

The wing thermal anti-icing (TAI) system uses engine bleed air to prevent ice on the leading edge slats. The system components include the wing TAI valves, wing temperature switches, wing pressure switches, telescoping ducts, flexible couplings, spray tubes, wing and engine anti-ice control panel, and test panel.

机翼热防冰(TAI)系统利用发动机引气防止前缘襟翼结冰。系统组件包括机翼热防冰活门、机翼温度开关、机翼压力开关、伸缩管、柔性联轴器、喷管、机翼和发动机防冰控制面板以及测试面板。

Functional Description

功能描述

(1) The WING ANTI-ICE switch on the M10397 panel controls the operation of the wing thermal antiice (TAI) system during flight.

M10397面板上的机翼防冰开关在飞行期间控制机翼热防冰(TAI)系统的操作。

(2) During flight, when you put the Wing Anti-Ice switch to the on position, it energizes the wing TAI control relay. The amber L and R VALVE lights on the M10397 panel come on. After two seconds,the wing TAI control time delay (T/D) relay closes and the TAI valves open. The L and R VALVE lights go off.

在飞行过程中,当您将机翼防冰开关置于开启位置时,它将为机翼热防冰控制继电器供电。M10397面板上的琥珀色L和R VALVE指示灯亮起。两秒钟后,机翼热防冰控制延时(T/D)继电器关闭,热防冰活门打开。L和R VALVE指示灯熄灭。

(3) If the position of a wing’s TAI valve does not agree with its commanded position, that wing’s VALVE light comes on and applicable EICAS message L or R WING ANTI-ICE will show.

如果机翼热防冰活门的位置与其指令位置不一致,则该机翼的“活门”指示灯亮起,并显示相应的EICAS信息L或R WING ANTI-ICE。

(4) If the duct pressure is more than 34 psi, the L and R wing TAI pressure switches close to the ground position and applicable EICAS message L WING TAI VALVE and R WING TAI VALVE will show.

如果管道压力超过 34 psi,则左、右机翼热防冰压力开关将关闭至接近地面位置,并显示相应的 EICAS 信息 L WING TAI VALVE 和 R WING TAI VALVE。

(5) With the airplane on the ground, when you put the Wing Anti-Ice switch to the on position , the L and R VALVE lights do not come on.

当飞机停放在地面时,将机翼防冰开关置于开启位置,L和R活门指示灯不会亮起。

(6) With the airplane on the ground, when you put the Wing Anti-Ice switch to the on position , the L and R VALVE lights come on. In 4 seconds or less, the EICAS messages L WING ANTI-ICE and R WING ANTI-ICE will show.

当飞机停放在地面时,将机翼防冰开关置于开启位置,L和R活门指示灯会亮起。4秒或更短的时间内,EICAS将显示L WING ANTI-ICE和R WING ANTI-ICE信息。