802170 HIGH PRESSURE SHUTOFF VALVE

高压关断活门

一、名称

HIGH PRESSURE SHUTOFF VALVE

高压关断活门

二、件号

802170-1~-12

三、章节号

36-12-14

四、适用机型

B747-400/B767

五、系统

36 PNEUMATIC

气源

六、安装位置

发动机

七、部件原理

1. Description

A. The High Pressure Shutoff Valve (Figure 1 for PN 802170-1 thru -8, Figure 2 for PN 802170-9 thru -12) is a 5.5-inch (139.7000 mm) butterfly valve powered by a half-area pneumatic actuator. The actuator, which is bolted to the high temperature alloy valve body, is a piston-type design which drives the butterfly valve through a connecting link and crank.

B. The valve utilizes two plunger-type valve position switches. Both of the switches are used for built in test equipment (BITE) indications. Only the close switch is used for flight panel indication of valve closure.

C. The valve switch actuating lever is hex shaped to allow manual positioning of the valve. A positioning screw, normally stored in the actuator cap, may be removed to vent actuator servo pressure and threaded into the switch actuating lever to lock the valve in the closed position.

D. Visual valve position indication is shown by the position of the switch actuation lever to O (open) and S (shut) markings on the actuator housing.

1.说明

A.高压关断活门（图1适用于PN 802170-1至-8，图2适用于PN 802.170-9至-12）是一个5.5英寸（139.7000毫米）的蝶阀，由半面积气动作动器提供动力。作动器通过螺栓固定在高温合金壳体上，采用活塞式设计，通过连杆和曲柄驱动蝶板。

B.该活门采用两个柱塞式活门位置开关。这两个开关都用于内置测试设备（BITE）指示。只有关闭开关用于飞行面板指示阀门关闭。

C.阀门开关驱动杆为六角形，允许手动定位阀门。通常存储在作动器盖中的定位螺钉可以被移除以释放致动器伺服压力，并拧入开关作动杆以将活门锁定在关闭位置。

D.活门位置的视觉指示是通过致动器外壳上O（打开）和S（关闭）标记的开关致动杆的位置来显示的。

2. Operation

A. The High Pressure Shutoff Valve operates in response to pneumatic servo pressure (Figure 3). This pressure enters the valve actuator and acts against a piston which is loaded toward the closed position by a spring and inlet pressure. Sufficient servo pressure moves the actuator piston and attached links and crank to open the valve.

B. If the controller servo pressure is lost or shut off, the spring-loaded piston and the inlet pressure moves the valve to the closed position.

C. In the valve closed position both position switches are closed (Figure 4). The valve closed position switch provides a signal to the flight panel and the BITE module. The valve open position switch provides a signal only to the BITE module.

2.操作

A.高压关断活门根据气动伺服压力进行操作（图3）。该压力进入活门作动器，并作用在活塞上，活塞在弹簧和入口压力的作用下被加载到关闭位置。足够的伺服压力使作动器活塞和连接的连杆和曲柄移动，以打开活门。

B.如果控制器伺服压力丢失或关闭，弹簧加载的活塞和入口压力会将活门移动到关闭位置。

C.在活门关闭位置，两个位置开关都关闭（图4）。活门关闭位置开关向飞行面板和BITE模块提供信号。活门打开位置开关仅向BITE模块提供信号。

八、工作参数

九、在飞机系统中的工作原理及互联

The HPSOV opens and closes because of pneumatic servo pressure from the HPC. This pressure enters the valve actuator and acts against a spring and inlet pressure loaded piston. Sufficient servo pressure (10 psi minimum) from the HPC moves the actuator piston and attached links and cranks to open the valve. The valve is spring loaded to fully close if servo pressure is lost.

HPSOV因HPC的气动伺服压力而打开和关闭。该压力进入活门作动器，并作用于弹簧和入口压力加载活塞。来自HPC的足够伺服压力（最小10 psi）移动执行器活塞和连接的连杆和曲柄以打开阀门。如果伺服压力损失，阀门将通过弹簧加载完全关闭。