超温关断活门/涡轮压缩机关断活门
一、名称
Over Temperature Shut-Off Valve/Turbo-Compressor Shut-Off Valve
超温关断活门/涡轮压缩机关断活门
二、件号
4404B000-001/-003/-004
三、章节号
47-11-01
四、适用机型
B747
五、系统
47 INERT GAS SYSTEM
惰性气体系统
六、安装位置
The left ram air duct compartment
左冲压空气管道舱
七、部件原理
The body of the OTSOV/TCSOV has two aluminium alloy parts, the body inlet assembly and the outlet flange. The outlet flange has a V-flange for connection to the aircraft airducts. The two parts are attached by six bolts. An aluminium alloy head valve moves in the cylinder of the inlet assembly. The head valve has a ring assembly installed in the groove in its outside diameter to limit leakage and to give smooth operation of the head valve. The head valve is held in position by a spring and by air pressure and moves along a shaft attached to the inlet assembly. A solenoid valve assembly is attached to the inlet assembly by three bolts and consists of the solenoid valve and an electrical receptacle.
OTSOV/TCSOV的阀体有两个铝合金部件，即阀体进口总成和出口法兰。出口法兰有一个V形法兰，用于连接到飞机气路。这两个部件由六个螺栓连接。一个铝合金头阀在进气总成的气缸中移动。头阀在其外径的凹槽中安装了一个环组件，以限制泄漏并使头阀平稳运行。头阀由弹簧和空气压力固定在适当位置，并沿着连接到入口组件的轴移动。电磁阀总成通过三个螺栓连接到进口总成，由电磁阀和电气插座组成。
The OTSOV/TCSOV is closed in the un-energised state held in place by a spring and air pressure behind it. When the solenoid is energized the head valve opens. The OTSOV will be operated by a controller on system start-up and on system shut down. The OTSOV will close when the temperature switch, located upstream of the OTSOV, reaches 58.7°F (137.7°C). The TCSOV is operated by the controller at different flight envelope stages and flow modes.
OTSOV/TCSOV在未通电状态下关闭，由弹簧和其后面的空气压力保持在原位。当电磁阀通电时，头部阀打开。OTSOV将在系统启动和系统关闭时由控制器操作。当位于OTSOV上游的温度开关达到58.7°F（137.7°C）时，OTSOV将关闭。TCSOV由控制器在不同的飞行包线阶段和流动模式下操作。
八、工作参数
九、在飞机系统中的工作原理及互联
AIR SEPARATION UNIT
空气分离装置
The air separation unit (ASU) is a pallet installed unit in the air conditioning pack bay on the right side of the airplane. The ASU contains the air separation modules (ASMs) and the flow valves that control the quantity and quality (purity) of the nitrogen-enriched air. The nitrogen-enriched air is distributed to the center wing tank to decrease the flammability of the air inside the tank.
空气分离装置（ASU）是一个托盘式装置，安装在飞机右侧的空调机组舱中。ASU包含空气分离模块（ASM）和流量活门，用于控制富氮空气的数量和质量（纯度）。富氮空气被分配到中央机翼油箱，以降低油箱内空气的可燃性。
A. The overtemperature shutoff valve (OTSOV) provides redundant overheat protection for bleed air entering the Air Separation Module (ASM)s.
超温关断活门（OTSOV）为进入空气分离模块（ASM）的引气提供冗余过热保护。
B. The overtemperature shutoff valve (OTSOV) is a 1.5 inch (3.1 centimeter) diameter, normally springload closed valve. A 28 volts direct current (VDC) solenoid controls valve position. The overtemperature shutoff valve (OTSOV) is identical to the Turbo Compressor Shutoff Valve (TCSOV).
超温关断活门（OTSOV）是一个直径1.5英寸（3.1厘米）、通常为弹簧负载关闭的阀门。一个28伏直流（VDC）电磁阀控制阀的位置。超温关断活门（OTSOV）与涡轮压缩机关断活门（TCSOV）相同。
C. The overtemperature shutoff valve (OTSOV) pneumatically operates from electrical control. The overtemperature shutoff valve (OTSOV) has a spring load to the closed position. When the solenoid energizes, air pressure goes in the opening chamber, and the overtemperature shutoff valve (OTSOV) opens. When the solenoid de-energizes, the air pressure path to the opening chamber closes. The opening chamber has a vent, and spring tension closes the overtemperature shutoff valve (OTSOV).
超温关断活门（OTSOV）通过电气控制气动操作。超温关断活门（OTSOV）在关闭位置具有弹簧负载。当电磁阀通电时，空气压力进入打开室，超温切断阀（OTSOV）打开。当电磁阀断电时，通向开启室的空气压力路径关闭。开启室有一个通风口，弹簧张力关闭超温关断活门（OTSOV）。
The NGS controller energizes the solenoid for normal operation. The NGS de-energizes the solenoid when the system is off. If the NGS controller does not close the valve when the temperature is too high, the ASU thermal switch operates. This de-energizes the solenoid independently from the NGS controller, and the valve closes.
NGS控制器为电磁阀通电以进行正常操作。当系统关闭时，NGS会使电磁阀断电。如果温度过高时NGS控制器没有关闭活门，ASU热开关会工作。这使电磁阀独立于NGS控制器断电，阀门关闭。
The bleed pressure sensor has an airtight sealed electronic circuitry housed within a corrosion-resistant steel shell. Bleed air comes from the pressure sense line and goes into the sensor. The NGS controller supplies power to the sensor which then monitors the bleed air pressure. When the bleed air pressure goes above 67 psig (462 kPa), a signal is sent to the NGS controller. The NGS controller then commands the NGS shutoff valve and the over-temperature shutoff valve (OTSOV) to close. Damage is prevented to the air separation module (ASM) and the center tank.
引气压力传感器有一个气密密封的电子电路，安装在耐腐蚀的钢壳内。放气来自压力感应管路并进入传感器。NGS控制器向传感器供电，然后传感器监测引气压力。当引气压力超过67 psig（462 kPa）时，向NGS控制器发送信号。然后，NGS控制器命令NGS关断活门和超温关断活门（OTSOV）关闭。可以防止空气分离模块（ASM）和中央油箱损坏。
十、系统介绍/拓展知识
NITROGEN GENERATION SYSTEM
氮气生成系统
DESCRIPTION
描述
(1) The nitrogen generation system (NGS) is a safety enhancement system that decreases the flammability of the center wing tank. The NGS is an onboard inert gas system that uses an air separation module (ASM) to separate oxygen and nitrogen from the air. After the two components of the air are separated, the nitrogen-enriched air (NEA) is supplied to the center wing tank. The oxygen-enriched air (OEA) is vented overboard. NEA is produced in sufficient quantities to change the oxygen content in the center wing tank. In most conditions, the oxygen content is decreased to a level where the air volume (ullage) will not support combustion.
(2) The primary fire protection system for the fuel tank system is ignition prevention. The nitrogen generation system is intended to add an additional layer of fire protection to the center wing tank. Ignition prevention, with the added fire protection of the nitrogen generation system, will decrease the flammability of the center wing tank.
（1）氮气生成系统（NGS）是一种安全增强系统，可降低中央翼油箱的可燃性。NGS是一种车载惰性气体系统，使用空气分离模块（ASM）从空气中分离氧气和氮气。在空气的两种成分被分离后，富氮空气（NEA）被供应到中央机翼油箱。富氧空气（OEA）排放到船外。NEA的产生量足以改变中央机翼油箱中的氧气含量。在大多数情况下，氧含量会降低到空气体积（空隙）不支持燃烧的水平。
（2） 燃油箱系统的主要消防系统是防止点火。氮气生成系统旨在为中央翼油箱增加一层额外的防火层。通过增加氮气生成系统的防火保护，防止点火将降低中央翼油箱的可燃性。