3215618 NOSE COWLANTI-ICE VALVE

前整流罩防冰活门

一、名称

NOSE COWLANTI-ICE VALVE

前整流罩防冰活门

二、件号

3215618-2~-5

三、章节号

30-20-05

四、适用机型

B737-NG

五、系统

30 ICE AND RAIN PROTECTION

防冰防雨

六、安装位置

发动机

、

七、部件原理

(1) This is a pneumatically-actuated pressure regulating and shutoff valve. It is spring loaded closed and gives backup pressure regulation and solenoid shutoff functions. Refer to Figure 5 and Figure 6.

(2) With normal inlet air pressure applied and the solenoid de-energized as shown, the butterfly is closed. When the solenoid is energized, the butterfly opens fully.

（1）这是一种气动作动的压力调节和关断活门。它是弹簧加载关闭的，并提供备用压力调节和电磁阀关闭功能。参见图5和图6。

（2）如图所示，在正常施加进气压力且电磁阀断电的情况下，蝶板（活门板）关闭。当电磁阀通电时，蝶板完全打开。

Operation

A. Nose Cowl Thermal Anti-Ice Valve

(1) The nose cowl thermal anti-ice valve has a visual position indicator and open and closed position switches. Refer to Figure 5 and Figure 6.

(2) Manual Override Operation:

(a) The nose cowl thermal anti-ice valve can be manually operated and is lockable in the closed and open position.

(b) The nose cowl thermal anti-ice valve can be manually locked when the position indicator retaining screw is loosened, the butterfly shaft hex is rotated to the desired position and the lock is slid into the recess in the cover plate. The manual lock is retained in the override position when the position indicator retaining screw is tightened.

(3) (Codes C and D) Relief Valve Operation. Refer to Figure 6:

(a) A relief valve is provided in the downstream pressure sense loop to the closing chamber. In the event of the nose cowl thermal anti-ice valve being operated in the manually locked open mode and inlet pressure to the nose cowl thermal anti-ice valve exceeds the maximum normal operating pressure, the relief valve vents pressure to protect the actuator components from forces that could result in damage.

工作

A. 进气整流罩热防冰活门

（1）进气整流罩热防冰活门有可视的位置指示器和打开和关闭位置开关。参见图5和图6。

（2）手动超控操作：

（a）进气整流罩热防冰活门可手动操作，并可锁定在关闭和打开位置。

（b）当松开位置指示器固定螺钉，将轴六角头旋转到所需位置，并将锁块滑入盖板的凹槽中时，可以手动锁定进气整流罩热防冰活门。当位置指示器固定螺钉拧紧时，手动锁保持在超控位置。

（3）Code C和D）安全阀操作。参考图6：

（a）在通往关闭腔的下游压力感应回路中提供一个安全阀。如果进气整流罩热防冰活门在手动锁定打开模式下操作，并且进气整流罩热防冰活门的入口压力超过最大正常操作压力，则安全阀释放压力，以保护作动器部件免受可能导致损坏的力的影响。

八、工作参数

Inlet Temperature:

Normal：831°F (444°C) maximum

Single failure：1,104°F (596°C)

Inlet Pressure Range: 0 to 202 PSIG (0 to 1,393 kPa)

Ambient Temperature Range：-65 to 250°F (-54 to 121°C)

Mating connector：MS24266R16T10S

九、在飞机系统中的工作原理及互联

气体来源于气源系统（36章）高压级5级引气

Purpose：

The inlet cowl anti-icing system keeps ice from forming on the engine inlet cowl.

General Description：

Each engine has an inlet cowl anti-icing system.

The systems operate in flight and on the ground.

A switch on the P5 forward overhead panel controls the operation of each inlet cowl anti-icing system.

When the system is on, the inlet cowl thermal anti-ice (TAI) valve opens. Hot air from the engine bleed air interstage duct goes through the valve into the hollow inlet cowl. The warm air increases the temperature in the inlet cowl. The warm air then goes overboard through a vent at the bottom of the cowl.

Each engine is the source of its inlet cowl thermal anti-icing air.Thermal anti-icing air is from the engine bleed air interstage duct, upstream of the pressure regulator and shutoff valve.

An inlet cowl TAI pressure switch monitors the pressure in the duct downstream of the inlet cowl anti-icing valve.

目的 ：

进气整流罩防冰系统阻止发动机进气整流罩结冰。

概况介绍 ：

每个发动机有一个进气整流罩防冰系统。

系统可在空中和地面工作。

P5 前顶板上有个电门控制每一个进气整流罩防冰系统的工作。

系统在开位时，进气整流罩热防冰活门打开。从发动机引气总管来的热空气流经活门进入空的进气整流罩。热空气增加进气整流罩的温度。然后经过整流罩底部的排气口流到外部。

进气整流罩热防冰空气来源于发动机。热防冰空气来自发动机引气总管，上流至压力调节器和关断活门。

进气整流罩热防冰压力电门监视进气整流罩防冰活门管道下游压力。

The inlet cowl anti-ice valve is an electrically controlled and pneumatically operated butterfly valve. It is spring loaded to the closed position. When the control signal energizes the valve solenoid, the solenoid lets upstream duct pressure into the valve regulator.The regulator controls the pressure and sends it to the actuator. The actuator opens the valve against spring pressure. A downstream sense line on the valve biases the regulator. The regulator modulates the valve butterfly plate to limit downstream pressure to 50 psi maximum.

Valve limit switches give valve position feedback to the P5-11 module for system status indication.

The inlet cowl TAI valve has a manual override collar. You can manually lock the valve in the full open or full closed position if the valve fails.

进气整流罩热防冰活门是一个电气控制气源操纵的蝶形活门。有弹簧载荷使它到关闭位。 当控制信号给活门电磁阀时，电磁阀使上游管道压力进入活门调节器。调节器控制压力并使其进入作动筒。作动筒克服弹簧压力打开活门。活门上的下游传感器管旁通调节器。调节器调整蝶形活门限制下游压力最大值至50PSI。

活门限制电门反馈活门位置信号给P5-11 组件，以便系统状态指示。

进气整流罩热防冰活门有一个人工超控轴环。如果活门失效，能人工将活门锁到全开或全关位。

Purpose：The inlet cowl thermal anti-ice (TAI) pressure switch monitors pressure in the inlet cowl TAI duct downstream of the inlet cowl TAI valve.

Location：The inlet cowl TAI pressure switch is on the inlet cowl TAI duct,downstream of the inlet cowl thermal anti-ice valve.

Physical Description：The inlet cowl TAI pressure switch has these parts:

* Sense Line connector

* Electrical connector.

Functional Description：The switch is an aneroid type switch.When the pressure at the sense port is more than 65 psi, the switch closes.

压力电门：

目的 ：进气整流罩热防冰压力电门监视进气整流罩热防冰活门下游进气整流罩热防冰管道压力。

位置 ：进气整流罩热防冰压力电门在进气整流罩热防冰活门下游、进气整流罩热防冰管道上。

具体说明 ：进气整流罩热防冰压力电门有这些部件：

－ 传感管接头

－ 电气接头

功能介绍 ：电门是膜盒电门。

当传感管口压力大于65 Psi 时，电门关闭。

Inlet Cowl Anti-Icing

When you put the ENG ANTI-ICE switch in the ON position, the switch does these things:

* Sends 28v dc to energize the control solenoid on the inlet cowl TAI valve

* Gives an open loop discrete to the EEC (for engine idle control)

* Gives an open loop discrete to the FMC (to bias fuel schedules for bleed loads).

The control panel logic and a dimming diode control the blue COWL VALVE OPEN lights:

* Light is off – the switch is in the OFF position and the valve is closed

* Light is dim – the switch is in the ON position and the valve is open

* Light is bright – the switch position and valve position disagree or the valve is in transit.These things control the bright and dim functions of the COWL VALVE OPEN lights on the anti-ice panel:

* System switch and valve position feedback

* Control panel solid state switch circuits

* Voltage reduction zener diodes (dim mode).

The closed position switch and the open position switch give valve position data.

The closed position switch is in the closed position when the valve is almost closed.

The open position switch is in the open position when the valve is more than 15 degrees open.

Overpressure Indication：

When the inlet cowl TAI pressure switch operates, it causes these lights to come on:

* The amber COWL ANTI-ICE light

* The MASTER CAUTION and ANTI-ICE annunciator lights.

进气整流罩防冰 ：

当把发动机防冰电门打在接通位时，电门有以下作用：

－ 进气整流罩热防冰活门上的控制电磁阀得到28 伏直流电

－ 提供开环离散信号给EEC（为了发动机慢车控制）

－ 提供开环离散信号给FMC（为引气负载旁通燃油计划）。

控制面板逻辑和一个暗亮的二极管控制兰色的整流罩活门打开灯；

－ 灯灭—电门在断开位，活门在关闭位

－ 灯暗—电门在接通位，活门在打开位

－ 灯明亮—电门和活门位置不一致或者活门在转换过程中。

下列部件控制防冰板上的整流罩活门打开灯的明亮和暗亮：

－ 系统电门和活门位置反馈信号

－ 控制面板固态电门回路

－ 齐纳二极管减小电压（暗亮模式）。

关闭和打开的的位置电门提供活门位置数据。

当活门开度小于7 度时，关闭的位置电门在关闭位。

当活门开度大于25 度时，打开的位置电门在打开位。

超压指示 ：

当进气整流罩热防冰压力电门工作时，下述灯亮：

－ 琥珀色整流罩防冰灯

－ 主告诫和防冰指示灯。

CDS Displays：

The common display system (CDS) shows engine inlet cowl TAI status. The display message is TAI. It shows left of each digital N1 speed indication field.

The TAI message is green when the switch is in the ON position and the CTAI valve is open.

The TAI message is amber when the switch and the valve position do not agree for more than 8 seconds.

公共显示系统显示 ：

公共显示系统显示发动机进气整流罩热防冰状态。显示信息是TAI，显示在每一个发动机N1 转速指示域的左边。

电门在开位、整流罩防冰活门在开位时，TAI 信息为绿色。

电门和整流罩热防冰活门不一致超过8秒时，TAI信息为琥珀色。

General Description：

The cowl anti-ice valve opens when the switch is in the ON position on the ground or in flight. The blue COWL VALVE OPEN light shows the valve and switch positions. These are the light indications:

* Light is off – the switch is in the OFF position and the valve is closed

* Light is dim – the switch is in the ON position and the valve is open

* Light is bright – the switch position and valve position are not the same or the valve is in transit.

When the duct pressure downstream of the valve is too high, this is the indication:

* Amber COWL ANTI-ICE light

* MASTER CAUTION and ANTI-ICE annunciator lights.

防冰面板：

地面或空中时，当电门在接通位时，整流罩防冰活门打开。兰色整流罩活门打开灯显示活门和电门位置。灯指示情况如下：

－ 灯灭—电门在断关位及活门关闭

－ 灯暗亮—电门在接通位及活门打开

－ 灯明亮—电门和活门位置不一致或者活门在转换过程中。

当活门下游的管道压力太高，指示如下：

－ 琥珀色整流罩防冰灯亮

－ 主告诫和防冰指示灯亮。