810204 FLOW CONTROL AND SHUTOFF VALVE （FCSOV）

流量控制和关断活门

一、名称

FLOW CONTROL AND SHUTOFF VALVE （FCSOV）

流量控制和关断活门

二、件号

810204-1,2,3,4

三、章节号

21-35-01

四、适用机型

B777

五、系统

21 AIR CONDITIONING

空调

六、安装位置

空调舱

七、部件原理

The flow control and shutoff valve controls bleed air flow to the air conditioning pack. The bleed air flow is controlled by the CTC Controller during usual operation. Flow is controlled by the ASCPC Controller when electrical power is lost.

流量控制和关断活门控制流向空调组件的引气流量。在正常工作时，引气流量由CTC控制器控制。断电时，流量由ASCPC控制器控制。

The flow control and shutoff valve has two primary parts: an actuator assembly and a butterfly (flow control) valve assembly.

流量控制和关断活门有两个主要部件：作动器组件和蝶形（流量控制）阀组件。

C. The actuator assembly has a pneumatic actuator, a CACTCS-controlled torque motor, an ASCPC-controlled torque motor, a proximity switch, a plug and filter, and a manual wrenching and locking device.

作动器组件有一个气动作动器、一个CACTCS控制的力矩马达、一个ASCPC控制的力矩马达、一个接近开关、一个插头和过滤器以及一个手动扳手和锁定装置。

The pneumatic actuator has a piston, a piston guide, a diaphragm, a flat spring, and a connecting link which attach to the crank of the flow control valve shaft. The actuator parts operate together to open or close the valve.

气动作动器有一个活塞、一个活塞导向、一个膜片、一个板簧和一个连接到流量控制阀轴曲柄上的连杆。作动器部件一起操作以打开或关闭活门。

The flow control valve attaches to the actuator housing and has a shaft and disk set installed in the bore of the valve housing. The valve shaft crank is installed in the actuator housing and the crank connects to the actuator piston by a link connector. The valve also has a proximity switch that supplies a valve-closed signal for BIT logic.

流量控制活门连接到作动器壳体上，并在活门壳体的孔中安装了一个轴和阀盘组件。活门轴曲柄安装在作动器壳体中，曲柄通过连杆接头连接到作动器活塞上。活门还有一个接近开关，为BIT逻辑提供活门关闭信号。

The valve is mounted by its flanges to the ducts.

活门通过其法兰安装在管道上。

Flow control and shutoff valve PN 830204-1 has insulation installed to reduce heat radiation to the air conditioning pack area. NOTE: Figure 1 shows the flow control and shutoff valve without the insulation installed.

流量控制和关断活门PN 830204-1安装了隔热层，以减少对空调机组区域的热辐射。注：图1显示了未安装隔热层的流量控制和关断活门。

A.The butterfly disk opens and closes to control the air that flows through the flow control and shutoff valve.

蝶板打开和关闭，以控制流经流量控制和关断活门的空气。

B.The inlet pressure to the flow control and shutoff valve is internally sent through a filter to the small area side of the actuator. This supplies a closing force to the actuator, which moves the butterfly disk to a closed position.

流量控制和关断活门的入口压力通过过滤器内部输送至作动器的小面积侧。这将向作动器提供关闭力，从而将蝶板移动到关闭位置。

C.The same inlet pressure source is sent through the CACTCS- and ASCPC-controlled torque motors to the large area side of the actuator. This supplies an opening force to the actuator, which rotates the butterfly disk to an open position.

相同的入口压力源通过CACTCS和ASCPC控制的转矩电机发送到作动器的大面积侧。这向作动器提供打开力，从而将蝶板旋转到打开位置。

D.The CACTCS torque motor controls the servo pressure to the opening side of the actuator during usual operation. The ASCPC torque motor controls the servo pressure to the opening side of the actuator when there is a loss of electrical power to the CTC.

CACTCS力矩马达在正常操作过程中控制作动器打开侧的伺服压力。当CTC失去电力时，ASCPC力矩马达控制作动器开口侧的伺服压力。

E.There is a manual wrenching and locking device to lock the valve closed if the valve does not operate while on the aircraft. Do these steps to lock the valve: • remove the locking screw from the actuator to vent the diaphragm • turn the manual wrench to the closed position • thread the locking screw into the hole in the locking crank.

如果活门在飞机上不工作，有一个手动扳手和锁定装置可以将活门锁定在关闭位。执行以下步骤以锁定阀门：•从作动器上拆下锁定螺钉，使膜片放气•将手动扳手转到关闭位置•将锁定螺钉拧入锁定曲柄的孔中。

八、工作参数

九、在飞机系统中的工作原理及互联

The flow control system controls the quantity of air that goes from the pneumatic system into the air conditioning packs.

流量控制系统控制从气动系统进入空调机组的空气量。

The CTCs and the ASCPCs have logic that control the pack air flow. The ASCPCs have the backup pack flow control.

CTC和ASCPC具有控制空气流量的逻辑。ASCPC具有备份包流量控制功能。

With the air conditioning pack switch off, the two flow control and shutoff valves close. With the pack switch in AUTO, the flow control valves control pack air flow. The valves close if the pack fails, has an overheat condition, or if a higher priority bleed user is on.

空调组件关闭后，两个FCSOV关闭。当机组开关处于AUTO（自动）时，FCSOV控制机组空气流量。如果空调包出现故障、出现过热情况，或者有更高优先级的引气用户，则活门关闭。

The ozone converter decreases the amount of atmospheric ozone that goes into the cabin. Ozone is in the atmosphere at high altitudes. The ozone converter is serviceable for a longer time if it operates only at high altitudes. At low altitudes the lower flow control valve closes and the upper valve controls flow. At high altitude the upper valve closes and the lower valve controls flow.

臭氧转换器减少了进入客舱的大气臭氧量。臭氧在高海拔的大气中。如果臭氧转换器仅在高海拔地区工作，它可以使用更长的时间。在低海拔时，下部FCSOV关闭，上部FCSOV控制流量。在高空，上部活门关闭，下部活门控制流量。

For some low flow conditions, the flow control system sends signals to the pneumatic system. These signals adjust the engine bleed air temperature or HPSOV set-point. Lower bleed air temperature lets the pack operate with less restriction to air flow. A higher HPSOV set point lets the pneumatic system supply more air at low engine power settings.

对于一些低流量条件，流量控制系统向气动系统发送信号。这些信号可调节发动机引气温度或HPSOV设定值。较低的引气温度使空调包在空气流动阻力较小的情况下运行。较高级的HPSOV设定点使气动系统在低发动机功率设置下提供更多的空气。

The CTC and ASCPC have interfaces with the flow control components and with some of the pack temperature sensors. The CTC and ASCPC measure the pack air flow, control the flow control and shutoff valves, and monitor pack temperatures.

CTC和ASCPC具有与流量控制部件和一些空调包温度传感器的接口。CTC和ASCPC测量机组空气流量，控制FCSOV，并监测机组温度。

If the CTC fails or looses power, the ASCPC gives backup flow control. The upper valve closes and the lower valve controls. For backup up flow control, it is necessary to have valid data from the pack outlet and compressor discharge temperature sensors inside the pack. An overheat condition at either temperature sensor closes the valves.

如果CTC出现故障或失去电源，ASCPC将提供备用流量控制。上部FCSOV关闭，下部FCSOV控制。对于备份流量控制，有必要获得来自空调包出口和空调包内压缩机排气温度传感器的有效数据。任一温度传感器处的过热情况会关闭活门。

The ASCPC sends one of five flow schedules to the CTC. The CTC uses the flow schedule data to make decisions about the amount of air to send to the packs. A stall warning or ground engine start condition causes the ASCPC to send flow schedule 0. The CTC closes the flow control and shutoff valves for flow schedule 0.

ASCPC向CTC发送五个流量计划中的一个。CTC使用流量计划数据来决定要发送到空调包的空气量。失速警告或地面发动机起动条件会导致ASCPC发送流量计划0。CTC关闭流量计划0的FCSOV。

The flow control and shutoff valves operate by a pneumatic actuator which moves the disc in the valve. If there is no air pressure from the pneumatic system, a spring in the actuator closes the valve. With no power to the torque motors, the connections to ambient air pressure close. Supply pressure pushes the valve open against the force of the spring in the actuator. With power applied, the torque motors bleed air from one side of the pneumatic actuator. This permits the spring to move the valve disc to decrease the flow rate.One torque motor connects to the CTC. The other torque motor connects to the ASCPC. Each torque motor can independently control the actuator. The CTC gives normal control of the valve. The ASCPC gives backup pack flow control if the CTC can not operate.A proximity switch sends a signal to the CTC when the valve is closed. 

FCSOV由气动作动器操作，该作动器移动活门中的活门板。如果气动系统没有空气压力，作动器中的弹簧会关闭活门。在力矩马达没有电源的情况下，与环境空气压力的连接关闭。供应压力克服作动器中弹簧的作用力推动活门打开。在供电的情况下，力矩马达从气动作动器的一侧排出空气。这允许弹簧移动活门板以降低流量。一个力矩马达连接到CTC。另一个扭矩电机连接到ASCPC。每个力矩马达都可以独立控制作动器。CTC对活门进行正常控制。如果CTC无法运行，ASCPC将提供备份包流量控制。当活门关闭时，接近开关向CTC发送信号。

The flow control and shutoff valves open and close at specified rates. The rates are different for different conditions. When one valve starts to open, the OFF light in the pack switch goes out. When the two valves close, the OFF light comes on.

FCSOV以规定的速率打开和关闭。不同条件下的速率不同。当一个活门开始打开时，组件开关上的OFF指示灯熄灭。当两个活门关闭时，OFF（关闭）指示灯亮起。

When you put the pack switch to AUTO, the flow control and shutoff valve opens. The valve opens at a rate that gives efficient air cycle machine acceleration. The air flow increases to 60 lb/min in 5 seconds, then increases to the schedule rate in 55 more seconds.

当您将组件开关置于AUTO（自动）位置时，FCSOV打开。活门打开的速率可使空气循环机器有效加速。空气流量在5秒内增加到60磅/分钟，然后在55秒内增加到计划速率。

NOTE: Full pack flow varies based on many conditions such as APU or engines supplying bleed air, trim air off or on, recirc fans off or on, ambient outside temperature, etc.

注：全组流量根据许多条件而变化，如APU或发动机提供引气、配平空气关闭或打开、再循环风扇关闭或打开以及外部环境温度等。

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