气动关断活门109486
一、名称
Four Inch Diameter Pneumatic Butterfly Shutoff Valve (Load Control)
直径四英寸的气动关断活门（负载控制）
二、件号
109486-1-1/-4-1/-5-1/-6-1/-8
三、章节号
49-52-09
四、适用机型
B737-300/400/500
五、系统
49 AIRBORNE AUXILIARY POWER
机载辅助动力装置(APU)
六、安装位置
APU 舱
七、部件原理
Description
描述
(Codes A through E) (See Figure 1) This valve has:
(Codes A through E) (See Figure 1)该活门有：
a pneumatic actuator assembly
气动作动器组件
a solenoid assembly
电磁阀组件
a butterfly valve body assembly
蝶板壳体组件
a position indicator switch assembly
位置指示开关组件
a control pressure regulator and filter
控制压力调节器和气滤
a thermostat connection
恒温器接口
and a regulator supply pressure test port.
以及一个调节器供应压力测试端口。
(Code F) (See Figure 2) This valve has:
(Code F) (See Figure 2)该活门有
a pneumatic actuator assembly
气动作动器组件
a solenoid assembly
电磁阀组件
a butterfly valve body assembly
蝶板壳体组件
a position indicator switch assembly
位置指示开关组件
a thermostat connection
恒温器接口
a actuator supply port
作动器供气口
a check valve
单向阀
and a manual shutoff valve.
以及一个手动关断阀。
The pneumatic actuator has:
气动作动器有：
a spring loaded pneumatic actuator diaphragm and a toggle linkage enclosed in the actuator body.
一个弹簧加载的气动作动器膜片和一个封闭在作动器壳体内的拨动连杆。
The solenoid assembly has:
电磁阀组件有：
an ac/dc electrical solenoid assembly and a double ball switcher.
一个交流/直流电螺线管组件和一个双球切换器。
The actuator body has two chambers:
作动器壳体有两个腔：
Open and Closed.
打开和关闭
The butterfly valve body assembly has:
蝶板壳体组件有：
a valve body
活门壳体
a butterfly convolute disk mounted between two backing plates and a toggle linkage.
安装在两块底板和一个拨动连杆之间的蝶形盘旋胀圈。
The spring-loaded pneumatic actuator diaphragm connects the butterfly convolute disk by the toggle linkage to a serrated shaft.
弹簧加载的气动作动器膜片通过拨动连杆将蝶形盘旋胀圈连接到锯齿状轴上。
(Codes A through E) A spring-loaded rate control diaphragm is positioned between the actuator body and the rate control cover.
(Codes A through E) 弹簧加载式速率控制膜片位于作动器壳体和速率控制盖之间。
(Codes A through E) The rate control diaphragm separates the two chambers. A metering screw with an adjustable orifice is installed.
(Codes A through E) 速率控制膜片将两个腔分隔开来。安装了带可调孔口的计量螺杆。
A poppet valve is installed in the pneumatic actuator assembly.
气动作动器组件中安装了一个提升阀。
A test port in the rate control cover supplies access to the rate control diaphragm stop for adjustment.
速率控制盖上有一个测试口，可进入速率控制膜片止动器进行调节。
The position indicator switch assembly is located next to the solenoid assembly. The position indicator has two sets of contacts which are actuated by the movement of the butterfly disk.
位置指示器开关组件位于电磁阀组件旁边。位置指示器有两组触点，通过蝶板的移动来驱动。
(Codes A through E) The control pressure regulator and filter supply regulated air pressure to operate the pneumatic actuator assembly.
(Codes A through E) 控制压力调节器和气滤提供调节后的气压，以操作气动作动器器组件。
(Codes A through E) A regulator pressure test port and a thermostat connection are supplied to connect with the APU tubing and to supply a means of testing the regulator pressure limits.
(Codes A through E) 提供一个调节器压力测试端口和一个恒温器接口，用于连接 APU 管道，并提供一种测试调节器压力限制范围的方法。
The valve body assembly incorporates a drilled passage in the air inlet side which supplies air pressure for the control pressure.
活门壳体组件在进气侧有一个钻孔通道，为控制压力提供气压。
(Codes A through E) Operation (See Fig 3)
(Codes A through E) 操作（工作）(See Fig 3)
The butterfly is spring-loaded closed. When inlet pressure is available through the control pressure regulator, the valve is pressurized closed as long as the solenoid assembly is de-energized.
蝶板由弹簧加载关闭。当通过控制压力调节器获得入口压力时，只要电磁阀组件断电，阀门就会加压关闭。
With inlet pressure routed through the control pressure regulator to the switcher, the valve will be full-open when the solenoid assembly is energized.
当电磁阀组件通电时，入口压力通过控制压力调节器到达切换器，阀门将全开。
If the inlet pressure drops faster, then the pressure can equalize across the rate control diaphragm. The poppet valve will open, which will reduce the actuator pressure. This will cause the butterfly to move toward the closed position.
如果入口压力下降较快，则速率控制膜片上的压力可以达到平衡。提升阀将打开，从而降低作动器压力。这将导致蝶板向关闭位置移动。
The thermostat is connected with a normally closed, bleed off type thermostat. An increase in temperature above the thermostat calibration point will cause it to open, bleeding off the actuator pressure and moves the butterfly to the closed position.
恒温器连接有常闭式排气型恒温器。温度升高到恒温器校准点以上时，恒温器会打开，排出作动器器压力并将蝶阀移到关闭位置。
An electrical position indicator switch is added to indicate when the butterfly is near the closed position.
此外，还增加了一个电气位置指示开关，用于指示蝶阀何时接近关闭位置。
(Code F) Operation (See Figure 4)
(Code F)操作（工作）(See Figure 4)
The butterfly is spring-loaded closed. When the inlet pressure is available, the valve is pressurized closed as long as the solenoid assembly is de-energized.
蝶板由弹簧加载关闭。当进口压力可用时，只要电磁阀组件断电，活门就会加压关闭。
With supply pressure to the switcher, the valve will be fully-open when the solenoid assembly is energized. If the inlet pressure drops faster, then the pressure can equalize across the rate control diaphragm. The poppet valve will open, which will reduce the actuator pressure. This will cause the butterfly to move toward the closed position.
在切换器有供应压力的情况下，当电磁阀组件通电时，活门将全开。如果入口压力下降较快，则速率控制膜片上的压力会达到平衡。提升阀将打开，从而降低作动器压力。这将导致蝶板向关闭位置移动。
The thermostat is connected with a normally closed, bleed off type thermostat. An increase in temperature above the thermostat calibration point will cause it to open, which bleeds off the actuator pressure and moves the butterfly to the closed position.
恒温器连接有常闭式排气型恒温器。温度升高到恒温器校准点以上时，恒温器将打开，从而释放执行器压力并使蝶阀移动到关闭位置。
The valve is also equipped with a manual shutoff valve. Closing the manual shutoff valve will functionally change the valve to operate as a simple open or closed shutoff valve.
该活门还配有一个手动关断阀。关闭手动关断阀将在功能上改变活门的操作，使其成为一个简单的打开或关闭关断活门。
When the manual shutoff valve is closed (as shown in Figure 4), the rate control feature and reference pressure regulator are vented to ambient.
当手动关断阀关闭时（如图 4 所示），速率控制功能和参考压力调节器将向环境排气。
Actuator pressure is then routed to the switcher through the actuator supply port. The valve will open if the solenoid assembly is energized and closed when the solenoid assembly is de-energized.
然后，执行器压力通过作动器供气口进入切换器。如果电磁阀组件通电，活门将打开；如果电磁阀组件断电，活门将关闭。
A check valve is installed to stop pressure at the actuator supply port from feeding backward through the pressure regulator, when the valve is in the shutoff mode.
安装了一个单项阀，以阻止活门处于关闭模式时，作动器供气口的压力通过压力调节器反向输入。
An electrical position indicator switch is added to indicate when the butterfly is near the closed position.
增加了一个电气位置指示开关，用于指示蝶板何时接近关闭位置。
八、工作参数
九、在飞机系统中的工作原理及互联
1 . General
概述
A. The bleed air system for the APU supplies the compressed air for the air conditioning system, engine start system, and other pneumatic components of the airplane. The bleed air system also decreases compressor surge when the airplane is in flight and there in no bleed load. The bleed air system has these components:
(1) the bleed air valve
(2) the bleed air duct
(3) AIRPLANES WITHOUT THE ETC;
the APU control thermostat
(4) AIRPLANES WITH THE ETC;
the proportional control valve
(5) the differential pressure regulator
(6) the surge bleed valve.
A. APU 的引气系统为空调系统、发动机启动系统和飞机的其他气动元件提供压缩空气。当飞机在飞行过程中没有引气负载时，引气系统还能降低压缩机的喘振。引气系统由以下部件组成：
(1) 引气活门
(2) 引气管
(3) 没有引气活门的飞机；
APU 控制恒温器
(4) 有引气活门的飞机
比例控制活门
(5) 压差调节器
(6) 防喘引气活门。
2 . Bleed Air Valve
引气活门
A. The bleed air valve controls the bleed airflow from the APU turbine plenum to the airplane pneumatic ducts. The bleed air valve is installed on the bleed air duct at the front of the APU compartment. The bleed air valve has a main valve, actuator, rate control valve, and switcher valve.
A housing contains the main valve. The main valve is a butterfly valve that is usually in the closed position. The housing for the main valve has a port for a control air connection that is upstream of the butterfly valve. The actuator has a spring-loaded diaphragm and a linkage that closes the switcher valve. The switcher valve is a two-ball selector valve that is operated by a solenoid. The switcher valve controls the airflow to the two sides of the actuator diaphragm. One ball of the switcher valve is a check valve for the control air pressure. The other ball is the check valve for the switcher. The rate control valve controls a poppet-valve that is contained in the housing.
引气活门控制从 APU 涡轮增压器到飞机气动导管的引气气流。引气活门安装在 APU 舱前部的引气导管上。引气活门包括主阀、作动器、速率控制阀和切换阀。
主阀装在一个外壳内。主阀是一个蝶板阀，通常处于关闭位置。主阀外壳上有一个用于连接控制空气的端口，位于蝶阀的上游。作动器有一个弹簧加载的膜片和一个关闭切换阀的连杆。切换阀是一个由电磁铁操作的双球选择阀。切换阀控制流向作动器膜片两侧的气流。切换阀的一个球是控制气压的单向阀。另一个球是切换器的单向阀。速率控制阀控制一个装在外壳中的提升阀。
B. When the APU engine speed is more than 95%, the solenoid for the bleed air valve is energized. When the solenoid for the bleed air valve is not energized, the switcher valve moves the control air to the bottom of the actuator diaphragm. This keeps the main valve closed. Control air from upstream of the main valve moves to the two sides of the diaphragm of the rate control valve. The pressure of the two sides of the diaphragm is the same. This keeps the poppet valve closed. When the BLEED AIR switch is moved to the ON position, the solenoid for the bleed air valve is energized. This opens the check valve and closes the switcher valve. Also, the control air from the bottom of the actuator diaphragm moves to the top of the actuator diaphragm and opens the main valve. When the main valve opens, the pressure at the rate control valve will decrease in proportion to the quantity of bleed air from the APU. Since the adjustable orifice keeps to a limit the bleed air from the top of the rate control diaphragm, the rate control diaphragm will move down and open the poppet valve. Control air will bleed from the actuator to control the rate that the main valve opens. Also, this controls how much the main valve opens to prevent an overload on the APU. While the pressure of the control air bleeds from the top of the rate control diaphragm, the poppet valve will close slowly. While the poppet valve closes, the pressure from the control air in the actuator will increase and open the main valve more. When the poppet valve is fully closed, the main valve is fully open. The adjustable orifice is usually set to make the main valve open in 12 to 14 seconds.
当 APU 发动机转速超过 95% 时，引气活门电磁阀通电。当引气活门电磁阀未通电时，切换阀将控制空气移至作动器膜片底部。这将保持主阀关闭。主阀上游的控制空气移动到速率控制阀膜片的两侧。膜片两侧的压力相同。这使得提升阀保持关闭。当BLEED AIR开关移至接通（ON）位置时，引气活门电磁阀通电。这将打开单向阀并关闭切换阀。同时，作动器膜片底部的控制空气移动到作动器膜片顶部，打开主阀。当主阀打开时，速率控制阀的压力将与来自 APU 的引气量成比例地降低。由于可调节流孔将来自速率控制膜片顶部的引气控制在一定范围内，速率控制膜片将向下移动并打开提升阀。控制空气将从作动器中引气，以控制主阀的开启速度。此外，这还可以控制主阀的开启程度，以防止 APU 过载。当控制空气的压力从速率控制膜片顶部引气时，提升阀将缓慢关闭。在提升阀关闭的同时，作动器中控制空气的压力会增加，并使主阀进一步打开。当提升阀完全关闭时，主阀完全打开。可调节流孔通常设定为主阀在 12 至 14 秒内打开。
Operation (Fig. 2)
操作 (Fig. 2)
A. When the APU engine speed is more than 95%, electrical power is supplied to the circuit for the bleed air valve. With the BLEED AIR switch on the P5 forward overhead panel in the ON position, the solenoid for the bleed air valve is energized. The bleed air valve will open. With the bleed air valve open, the airplane pneumatic system can use the bleed air from the APU.
当 APU 发动机转速超过 95% 时，将向引气活门电路供电。当 P5 前顶板上的BLEED AIR 开关处于接通位置时，引气活门的电磁阀通电。引气活门将打开。引气活门打开后，飞机气动系统可以使用来自 APU 的引气。
B. AIRPLANES WITH THE ETC;
配备ETC的飞机；
When the airplane pneumatic system uses the bleed air from the APU, the proportional control valve supplies the overload protection for the APU.
In an overload condition, the EGT will increase. The proportional control valve will bleed the compressed air from the bleed air valve. The bleed air valve will close and the EGT will decrease.
当飞机气动系统使用来自APU的引气时，比例控制活门为APU提供过载保护。
在过载的情况下，EGT将会增加。比例控制阀将从引气活门中排出压缩空气。引气活门将关闭，EGT将下降。
C. AIRPLANES WITHOUT THE ETC;
未配备ETC的飞机；
When the airplane pneumatic system uses the bleed air from the APU, the APU control thermostat supplies the overload protection for the APU. In an overload condition, the EGT will increase. The APU control thermostat will bleed the compressed air from the bleed air valve. The bleed air valve will close and the EGT will decrease.
当飞机气动系统使用来自APU的引气时，APU控制恒温器为APU提供过载保护。在过载的情况下，EGT将会增加。APU控制恒温器将排出引气活门中的压缩空气。引气活门将关闭，EGT将下降。
